Based on the reduction potential data, What is the standard cell potential for the following electrochemical cell reaction: Zn(s) + Cu^2+(aq) Zn^2+(aq) + Cu(s)? E degree red = -0.763 V for Zn^2+ (aq) + 2e^- Zn(s) E degree red = +0.340 V for Cu^2+(aq) + 2e^- Cu(s). a. -0.423 V b. +1.10 V c. +0.423 V

Answers

Answer 1

Based on the reduction potential data, the standard cell potential for the electrochemical cell reaction is +1.10 V. The correct answer is B.

The standard cell potential is the difference between the standard reduction potentials of the two half-reactions. In this case, the half-reactions are:

Zn(s) + 2e- -> Zn²⁺(aq) E° red = -0.763 V

Cu²⁺(aq) + 2e- -> Cu(s) E° red = +0.340 V

The standard cell potential is therefore:

E° cell = E° red (cathode) - E° red (anode)

E° cell = +0.340 V - (-0.763 V)

E° cell = +1.10 V

Therefore, the correct option is B, +1.10 V.

To know more about standard cell potential, refer here:

https://brainly.com/question/29797132#

#SPJ11


Related Questions

how are the functions of a flower's stamen and pistil related to reproduction?

Answers

Answer: the essential parts of a flower

Explanation:

are engaged with seed creation. In the event that a blossom contains both useful stamens and pistils, it is known as an ideal bloom, regardless of whether it doesn't contain petals and sepals. On the off chance that either stamens or pistils are deficient with regards to, the blossom is called imperfect.

describe the spectrum you would observe for the emission spectrum of elemental hydrogen gas.

Answers

The observed emission spectrum of elemental hydrogen gas is; Series of Lines, colors, Balmer Series, and Ultraviolet and Infrared Lines.

The emission spectrum of elemental hydrogen gas consists of a series of discrete and distinct lines of different colors.

Series of Lines; The emission spectrum of hydrogen gas consists of a series of sharp, discrete lines rather than a continuous spectrum. Each line corresponds to a specific transition between energy levels in the hydrogen atom.

Colors; The lines in the hydrogen emission spectrum are of different colors, representing different wavelengths of light. The colors observed in the Balmer series include red, blue-green, violet, and other shades in between.

Balmer Series; The Balmer series is the most prominent and well-known part of the hydrogen emission spectrum. It corresponds to transitions where the electron in the hydrogen atom jumps from higher energy levels (n ≥ 3) to the second energy level (n = 2). The visible lines in the Balmer series include Hα (red), Hβ (blue-green), Hγ (violet), and so on.

Ultraviolet and Infrared Lines; In addition to the visible lines, the hydrogen emission spectrum also includes ultraviolet and infrared lines. The ultraviolet lines belong to the Lyman series (transitions to the first energy level, n = 1), while the infrared lines belong to the Paschen series (transitions to higher energy levels, n > 2).

To know more about emission spectrum here

https://brainly.com/question/31702311

#SPJ4

One of the following equations is that of a parabola with x-intercepts -5 and +5 in the standard (x, y) coordinate plane. Which equation?
a. y = x² + 25
b. y = (x + 5)(x - 5)
c. y = x(x + 5)(x - 5)
d. y = (x + 5)² - 25

Answers

Given that the x-intercepts of the parabola are -5 and 5 and we need to find out which equation from the given options is that of the parabola.  Option (b) y = (x + 5)(x - 5)

is the equation of a parabola with x-intercepts -5 and +5 in the standard (x, y) coordinate plane.

We know that the x-intercepts of a parabola are the points at which y is zero.

We have two x-intercepts: x = -5 and x = 5. Let's find which equation is correct.

a. y = x² + 25

For x = -5, we have

y = (-5)² + 25 = 50.

It does not satisfy the equation for the x-intercept of -5.

For x = 5, we have

y = (5)² + 25 = 50.

It does not satisfy the equation for the x-intercept of 5.

b. y = (x + 5)(x - 5)

For x = -5, we have

y = (0) (10) = 0.

This satisfies the equation for the x-intercept of -5.

For x = 5, we have

y = (10) (0) = 0.

This satisfies the equation for the x-intercept of 5.

c. y = x(x + 5)(x - 5)

For x = -5, we have

y = (-5) (0) (10) = 0.

This satisfies the equation for the x-intercept of -5.For x = 5, we have

y = (5) (10) (0) = 0.

This satisfies the equation for the x-intercept of 5.

d. y = (x + 5)² - 25

For x = -5, we have

y = (0) - 25 = -25.

It does not satisfy the equation for the x-intercept of -5.

For x = 5, we have

y = (10) - 25 = -15.

It does not satisfy the equation for the x-intercept of 5.

y = (x + 5)(x - 5)

is the equation of a parabola with x-intercepts -5 and +5 in the standard (x, y) coordinate plane.

Hence, the correct answer is option B.

To know more about x-intercepts visit:

https://brainly.com/question/32051056

#SPJ11

Convert 5 pounds to kilograms
Help me pleaseeee

Answers

Answer:

2.268

Explanation:

5 lb × 0.45359237 = 2.26796185 kg

How to convert Pounds to Kilograms

1 pound (lb) is equal to 0.45359237 kilograms (kg).

1 lb = 0.45359237 kg

The mass m in kilograms (kg) is equal to the mass m in pounds (lb) times 0.45359237:

m(kg) = m(lb) × 0.45359237

Example

Convert 5 lb to kilograms:

m(kg) = 5 lb × 0.45359237 = 2.268 kg

Hope this helped!!!

Answer:

2.26796 kg

Explanation:

Predict Will you find starch in a plant leaf grown in the light? Why?

Answers

Answer:

You would find starch in a plant leaf.

Explanation:

This is due to the fact that when there is excess energy, it will be stored in plant tissue as starch.

Br2 + 2LiF → 2LiBr + F2
Given: If 3.6 moles of Br2, react with 9.4 moles of LiF
a) How many moles of F, are produced? I​

Answers

1 grams F2 to mol = 0.02632 mol

10 grams F2 to mol = 0.26318 mol

20 grams F2 to mol = 0.52636 mol

30 grams F2 to mol = 0.78954 mol

40 grams F2 to mol = 1.05272 mol

50 grams F2 to mol = 1.3159 mol

100 grams F2 to mol = 2.6318 mol

200 grams F2 to mol = 5.2636 mol

true or false enthalpy is defined as the change in heat at constant pressure

Answers

True, enthalpy is defined as the change in heat at constant pressure.

The enthalpy change (ΔH) of a reaction is the amount of heat released or absorbed by a chemical reaction at constant pressure. Enthalpy is a state function that is extensively used in the field of thermodynamics.The enthalpy of a system can be calculated by measuring the change in enthalpy (ΔH) between the initial and final states of a reaction. The ΔH value can be positive (endothermic) or negative (exothermic), depending on whether the reaction releases or absorbs heat. For a reaction at constant pressure, the enthalpy change (ΔH) is equal to the heat released or absorbed by the reaction.

Learn more about enthalpy here:

https://brainly.com/question/29145818

#SPJ11

Carbon-14 is an isotope used in carbon dating. The nucleus becomes Nitrogen-14 through beta decay. Its half-life is 5370 years. We can use this information to think about the large sample of 14C that is part of all organic matter. We can also think about the fate of a single 14C nucleus, as we did above.
For a single 14C nucleus in the tool, how likely is it that it will decay in the next 5370 years? For a single 14C nucleus in the tool, how likely is it that it will decay in the next 200 years?

Answers

The probability that a single carbon-14 (14C) isotope nucleus will decay in a given time period can be calculated using the concept of half-life. The half-life of carbon-14 is 5370 years, which means that after this time period, half of the initial amount of carbon-14 will have decayed into nitrogen-14.

To determine the likelihood of decay for a single 14C nucleus in the next 5370 years, we can say that there is a 50% chance of decay. This is because the half-life is the time it takes for half of the nuclei to decay, so after one half-life, there is a 50% chance that an individual nucleus will have decayed. For the next 200 years, we need to calculate the number of half-lives that occur in that time period. Since each half-life is 5370 years, we can divide 200 by 5370 to find the number of half-lives. The result is approximately 0.037, meaning that less than one-half-life has passed. Therefore, the likelihood of decay for a single 14C nucleus in the next 200 years is low. It is less than 50% because less than one-half-life has passed. However, it is important to note that the decay of an individual nucleus is a random process, and while we can make predictions based on probabilities, it is not possible to determine with certainty whether a specific nucleus will decay within a given time frame.

Learn more about isotope here : brainly.com/question/28039996

#SPJ11

Explain why most inorganic substances do not burn, yet organic substances will
burn.

Answers

Most inorganic substances do not burn because they do to contain carbon. Organic substances do contain carbon.

Help me plz I’m like slow

Answers

Answer:

probably A that's my best guess

Answer:

Hello There!!

Explanation:

The answer is A.H20.This is water which isn't an ionic compound.

hope this helps,have a great day!!

~Pinky~

A buffer is made with 0.493 M of the weak base methylamine ([tex]CH3NH2[/tex]) with 0.493 M [tex]CH3NH3Cl[/tex] (KA = 5.6 x 10^-4)

What is the pH of this buffer system?

If 0.100 M HBr is added to the buffer, what is the pH?

Answers

h^ ar hidrojen oksijen azot helyum

how many moles of tin (ii) fluoride are there in 908 grams of tin (ii) fluoride

Answers

The number of moles of tin (II) fluoride in 908 grams of tin (II) fluoride is approximately 2.65 moles.

How many moles of tin (II) fluoride are present in 908 grams?

To determine the number of moles of tin (II) fluoride in a given mass, we need to use the concept of molar mass. The molar mass of tin (II) fluoride (SnF₂) is calculated by adding up the atomic masses of its constituent elements: tin (Sn) and fluorine (F).

The atomic mass of tin is 118.71 g/mol, and the atomic mass of fluorine is 18.998 g/mol. By adding these values together, we find that the molar mass of tin (II) fluoride is 156.71 g/mol.

To calculate the number of moles in a given mass, we use the formula:

Number of moles = Mass (in grams) / Molar mass.

In this case, we have 908 grams of tin (II) fluoride. Plugging the values into the formula, we get:

Number of moles = 908 g / 156.71 g/mol = 2.65 moles.

Understanding the relationship between mass, moles, and molar mass is fundamental in chemistry. This concept allows us to convert between different units and make quantitative calculations.

The molar mass plays a crucial role in determining the number of moles in a given mass and vice versa. Exploring further applications of moles and molar mass, such as stoichiometry and chemical reactions, can provide a deeper understanding of chemical processes and their measurements.

Learn more about moles

brainly.com/question/30885025

#SPJ11

All matter has:

volume
mass
density
all of the above

Answers

I think the answer is mass.

What would be the effect on this reaction of increasing the temperature?
2H2 + O2 = 2H20 + energy
A) the rate of formation of H2O would increase
B) The forward reaction would be favored
C) Increasing the temperature would not have an effect on this reaction
D) The rate of the forward reaction would decrease

Answers

Answer:

D) The rate of the forward reaction would decrease

Explanation:

The statement that describes effect on the reaction of increasing the temperature is "the rate of the forward reaction would decrease."

What is temperature?

Temperature is the measurement of a body's level of hotness or coolness.

The average kinetic energy of the system is measured by temperature. The kinetic energy of particles in a matter raises as they move faster, which boosts the temperature of the system. When two bodies of differing temperatures come into touch, heat is the energy exchanged between them.

The term "exothermic reaction" refers to a reaction that releases energy. An exothermic reaction, in other words, produces heat. The temperature of the reaction will rise unless it is cooled in some way. When you use an external heater to raise the temperature, it slows or reverses the reaction, reducing the number of products while increasing the amount of reactants.

Hence the correct answer is D.

Learn more about temperature here,

https://brainly.com/question/4220478

#SPJ2

Will mark brainliest!!

Answers

Answer:

I think its B im not sure

but i hope this helps

Calculate ΔHo for the process ½ N2(g) + ½ O2(g) → NO(g)
from the following information
N2(g) + 2 O2(g) → 2 NO2(g) ΔHo = -107.0 kJ/mol
2 NO(g) + O2 → 2 NO2(g) ΔHo = -351.5 kJ/mol

Answers

Answer : The ΔHo for the given reaction is -244.5 kJ/mol.

Explanation:

Given, the following equations and the corresponding ΔHo values:N2(g) + 2 O2(g) → 2 NO2(g) ΔHo = -107.0 kJ/mol2 NO(g) + O2 → 2 NO2(g) ΔHo = -351.5 kJ/mol

The reaction given is ½ N2(g) + ½ O2(g) → NO(g)

To determine the value of ΔHo for the above process, we can use the given thermochemical equations as follows:

What is meant by thermochemical equation?

Thermochemical equations: The chemical equation which includes the term 'Heat' are referred to as thermochemical equations. They include chemical equations for endothermic reactions and exothermic reactions.

Endothermic Reaction. Those thermochemical reactions in which heat is absorbed. Change in enthalpy for this reaction is positive. Exothermic Reaction. Exothermic reactions are the reaction in which the heat or the energy is evolved during the reaction.

ΔHo for the first equation isΔHo = [2ΔHo (NO2(g))] - [ΔHo (N2(g))] - 2[ΔHo(O2(g))]

We haveΔHo (NO2(g)) = - 107.0 kJ/molΔHo (N2(g)) = 0 kJ/molΔHo (O2(g)) = 0 kJ/mol

To find: ΔHo for the process ½ N2(g) + ½ O2(g) → NO(g)Solution:To obtain the required reaction, we need to subtract equation (1) from equation (2).

The obtained equation is:½ N2(g) + ½ O2(g) → NO(g) ΔHo = [2 NO(g) + O2 → 2 NO2(g)] - [N2(g) + 2 O2(g) → 2 NO2(g)] ΔHo = (-351.5 kJ/mol) - (-107.0 kJ/mol) ΔHo = -244.5 kJ/mol.

Therefore, the ΔHo for the given reaction is -244.5 kJ/mol.

Learn more about  ΔHo here https://brainly.com/question/13949764

#SPJ11

Which of Graphs 1 correctly represents the relationship between the volume and Kelvin temperature of a gas?

Answers

Answer:

B

Explanation:

Pressure is directly proportional to temperature

Which formula demonstrates a double replacement reaction?
1. A + B --> AB
2. AB + CD --> AC + BD
3. AB --> A + B
4. A + BC --> AC + B

Answers

Answer:

2

Explanation:

In an acid-base reaction involving neutral base B, what will be the conjugate acid Select the correct answer below , a. h20 b. H30 c. Oh- d hb+

Answers

In an acid-base reaction involving a neutral base B, the conjugate acid will be H₃O⁺. Option B is correct.

In an acid-base reaction involving a neutral base B, the conjugate acid will be formed by the addition of a proton (H⁺) to the base.

H₂O; Water (H₂O) is not a base but can act as an acid in certain reactions. It can donate a proton to form the hydroxide ion (OH⁻), making it a conjugate base rather than a conjugate acid.

H₃O⁺; The hydronium ion (H₃O⁺) is formed when a proton (H⁺) is added to water (H₂O). It is commonly found in aqueous acidic solutions and can act as an acid by donating a proton. Therefore, H₃O⁺ is the correct answer as it represents the conjugate acid in this acid-base reaction.

OH⁻; The hydroxide ion (OH⁻) is a base, not an acid. It accepts a proton (H⁺) to form water (H₂O) in basic solutions. OH⁻ would be the conjugate base, not the conjugate acid.

Hence, B. is the correct option.

To know more about conjugate acid here

https://brainly.com/question/8908134

#SPJ4

--The given question is incorrect, the correct question is

"In an acid-base reaction involving neutral base B, what will be the conjugate acid Select the correct answer below , A) H₂O B). H₃0 C). OH⁻."--

A beam of electrons, a beam of protons, a beam of helium atoms, and a beam of nitrogen atoms cach moving at the same speed. Which one has the shortest de-Broglie wavelength? A. The beam of nitrogen atoms. B. The beam of protons, C. All will be the same D. The beam of electrons. E the beam of helium atoms

Answers

The beam of protons  has the shortest de-Broglie wavelength if a beam of electrons, a beam of protons, a beam of helium atoms, and a beam of nitrogen atoms cach moving at the same speed.

Define De Broglie wavelength

The De Broglie wavelength, which is a wavelength present in all quantum mechanically manifested things and establishes the probability density of locating the object at a specific location in the configuration space, is said to be a manifestation of wave-particle duality. A particle's momentum is inversely correlated with its de Broglie wavelength.

For electrons,

λ = h/mv = h/(m * 4*10⁶ m/s) = 3.3 x 10⁻¹¹ m.

For  protons,

λ = h/mv = h/(m * 4*10⁶ m/s) = 1.3 x 10⁻¹³ m.

For helium atoms,

λ = h/mv = h/(m * 4*10⁶ m/s) = 1.7 x 10⁻¹¹ m.

For nitrogen atoms,

λ = h/mv = h/(m * 4*10⁶ m/s) = 3.3 x 10⁻¹¹ m.

To learn more about electrons :

https://brainly.com/question/371590

#SPJ4

Calculate the pH for each case in the titration of 50.0 mL of 0.220 M HClO(aq) with 0.220 M KOH(aq). Use the ionization constant for HClO, 4.0×10⁻⁸
What is the pH before addition of any KOH?
What is the pH after addition of 25.0 mL KOH?
What is the pH after addition of 35.0 mL KOH?
What is the pH after addition of 50.0 mL KOH?
What is the pH after addition of 60.0 mL KOH?

Answers

To calculate the pH at each stage of the titration, we need to consider the reaction between HClO and KOH. The balanced chemical equation for the reaction is:

HClO(aq) + KOH(aq) → KClO(aq) + H2O(l)

Before the addition of any KOH, we have only the HClO solution. HClO is a weak acid, so we can use the ionization constant (Ka) to calculate its initial concentration of H⁺ ions. Since HClO is the only acid present initially, the initial concentration of H⁺ ions is equal to the initial concentration of HClO. Therefore, [H⁺] = 0.220 M.

To calculate the pH after each addition of KOH, we need to determine the amount of HClO that reacts with KOH. From the balanced equation, we can see that the stoichiometric ratio between HClO and KOH is 1:1. This means that for every mole of HClO that reacts, an equal number of moles of H⁺ ions are consumed.

Before addition of any KOH:

[H⁺] = 0.220 M (given)

pH = -log10(0.220) ≈ 0.66

After addition of 25.0 mL KOH:

The amount of HClO reacted can be calculated using the initial concentration and the volume of KOH added. Since the concentration of KOH is the same as HClO, the concentration of HClO remaining is (0.220 M - 0.220 M/4) = 0.165 M. The volume of HClO solution remaining is (50.0 mL - 25.0 mL) = 25.0 mL = 0.025 L. Therefore, [H⁺] = 0.165 M/0.025 L = 6.6 M.

After addition of 35.0 mL KOH:

Following the same calculations as above, [H⁺] = 0.110 M.

After addition of 50.0 mL KOH:

[H⁺] = 0.055 M.

After addition of 60.0 mL KOH:

[H⁺] = 0.022 M.

Keep in mind that pH is a logarithmic scale, so as the concentration of H⁺ ions decreases, the pH value increases.

Learn more about pH here : brainly.com/question/2288405

#SPJ11

Which of the gases below are primarily obtained from the atmosphere? obtained from Atmosphere Drag the correct choices into the box. Leave the incorrect choices outside of the box. helium hydrogen nitrogen oxygen argon chlorine

Answers

Helium, hydrogen, and chlorine are obtained from sources other than the atmosphere. The gases primarily obtained from the atmosphere are nitrogen, oxygen, and argon.

Nitrogen, oxygen, and argon are the main components of Earth's atmosphere and are commonly obtained from the air. They exist in significant quantities in the atmosphere and are often extracted for various industrial and commercial purposes.

On the other hand, helium, hydrogen, and chlorine are not primarily obtained from the atmosphere. Helium is typically extracted from natural gas wells, hydrogen is usually produced from fossil fuels or electrolysis of water, and chlorine is obtained through chemical processes such as electrolysis or from chloride-containing compounds.

The gases primarily obtained from the atmosphere are nitrogen, oxygen, and argon. Helium, hydrogen, and chlorine are obtained from sources other than the atmosphere.

To know more about atmosphere, visit:

https://brainly.com/question/921955

#SPJ11

How many possible Mole Ratios are in the following reaction:
ZnO + 2 HCl --> ZnCl2 + H2O

Answers

Answer: 2 moles

Explanation:

two similar solids have a scale factor of 6:7. what is ratio of their volumes expressed in lowest terms? enter your answer by filling in the boxes. :

Answers

The ratio of the volumes of the two similar solids, expressed in the lowest terms, is 216:343.

To find the ratio of the volumes of two similar solids with a scale factor of 6:7, we can use the fact that the ratio of the volumes of similar solids is equal to the cube of the scale factor.

The ratio of the volumes of the two similar solids can be expressed as (6/7)³.

To simplify this ratio to its lowest terms, we can cube the numerator and denominator separately.

(6/7)³ = (6³)/(7³) = 216/343

Therefore, the ratio of the volumes of the two similar solids, expressed in lowest terms, is 216:343.

To know more about volume

https://brainly.com/question/29796637

#SPJ11

The Ksp for silver carbonate (Ag2CO3) is 8.1 times 10-12. Calculate the solubility of silver carbonate in each of the following. (a) water mol/L
(b) 0.22 M AgClO3 mol/L
(c) 0.41 M Na2CO3 mol/L

Answers

The solubility of silver carbonate in water is approximately 1.26 × 10⁻³ mol/L. The solubility of silver carbonate in 0.22 M AgClO₃ is approximately 2.92 × 10⁻⁵ mol/L. The solubility of silver carbonate in 0.41 M Na₂CO₃ is approximately 1.20 × 10⁻⁶ mol/L.

To calculate the solubility of silver carbonate (Ag₂CO₃) in different solutions, we need to compare the solubility product (Ksp) with the concentrations of relevant ions in the solution. The balanced equation for the dissociation of silver carbonate is:

Ag₂CO₃(s) ⇌ 2Ag⁺(aq) + CO₃²⁻(aq)

(a) Solubility in water:

Since water does not contain any common ions, the concentration of Ag⁺ and CO₃²⁻ ions in water is initially zero. Therefore, we assume x as the solubility of Ag₂CO₃ in mol/L.

The equilibrium concentrations of Ag⁺ and CO₃²⁻ ions are both 2x (as the stoichiometric ratio is 1:1).

The Ksp expression is:

Ksp = [Ag⁺]²[CO₃²⁻] = (2x)²(2x) = 8x⁵

Since the Ksp is given as 8.1 × 10⁻¹², we can set up the equation:

8x⁵ = 8.1 × 10⁻¹²

Solving for x, we find:

x = (8.1 × 10⁻¹² / 8)^(1/5) ≈ 1.26 × 10⁻³ mol/L

Therefore, the solubility of silver carbonate in water is approximately 1.26 × 10⁻³ mol/L.

(b) Solubility in 0.22 M AgClO₃:

In this case, the Ag⁺ ions are already present in the solution due to the presence of AgClO₃. The concentration of Ag⁺ is given as 0.22 M. Since the Ksp expression is [Ag⁺]²[CO₃²⁻], we assume x as the solubility of Ag₂CO₃ in mol/L.

The equilibrium concentration of Ag⁺ ions will be 0.22 + 2x, and the concentration of CO₃²⁻ ions will be 2x.

The Ksp expression is:

Ksp = (0.22 + 2x)²(2x) = 8x³ + 0.88x² + 0.088x

Since the Ksp is still 8.1 × 10⁻¹², we can set up the equation:

8x³ + 0.88x² + 0.088x = 8.1 × 10⁻¹²

Solving for x, we find:

x ≈ 2.92 × 10⁻⁵ mol/L

Therefore, the solubility of silver carbonate in 0.22 M AgClO₃ is approximately 2.92 × 10⁻⁵ mol/L.

(c) Solubility in 0.41 M Na₂CO₃:

In this case, the CO₃²⁻ ions are already present in the solution due to the presence of Na₂CO₃. The concentration of CO₃²⁻ is given as 0.41 M. Since the Ksp expression is [Ag⁺]²[CO₃²⁻], we assume x as the solubility of Ag₂CO₃ in mol/L.

The equilibrium concentration of Ag⁺ ions will be 2x, and the concentration of CO₃²⁻ ions will be 0.41 + 2x. The Ksp expression is then:

Ksp = (2x)²(0.41 + 2x) = 4x³ + 1.64x² + 0.328x²

Again, setting Ksp equal to 8.1 × 10⁻¹², we can solve for x:

4x³ + 1.64x² + 0.328x² = 8.1 × 10⁻¹²

x ≈ 1.20 × 10⁻⁶ mol/L

Therefore, the solubility of silver carbonate in 0.41 M Na₂CO₃ is approximately 1.20 × 10⁻⁶ mol/L.

Learn more about the common ion effect here:

https://brainly.com/question/30772969

#SPJ4

A.) Which metal would you expect to have the highest melting point? Tc, Ag, or Rb
B.) Which metal would you expect to have the highest melting point? Hg, Ba, or Os

Answers

the element with highest melting point among Tc, Ag, Rb is Tc that is technetium, while the element which highest melting point among Hg, Os, Ba is Os that is osmium. both of these elements belong to the d block also known as transition elements.

there is no regular trend in the melting point among the d block elements and tungsten is the elements with the highest melting point among the transition elements. the s block elemts on the other hand have relatively low melting points.

Rb and Ba belong to s block thus have lower melting points in comparison to d block elemts like technetium, osmium, silver, and mercury. s block metals are soft and have low melting points due to very week inter-metallic bonding between its atoms.

to know more about transition elements refer to the link below

https://brainly.com/question/30389112

#SPJ4

In scenario C, visible light is in the middle of the yellow region of the visible spectrum. Estimate its wavelength, frequency, and energy per photon. frequency: S-1 Incorrect In scenario D, visible light has a photon energy of 4.160 x 10-19 J. Determine its wavelength, frequency, and color. frequency: Incorrect S-1 wavelength: Incorrect energy per photon: wavelength: Incorrect The visible light in scenario D is Incorrect blue. nm nm In scenario C, visible light is in the middle of the yellow region of the visible spectrum. Estimate its wavelength, frequency, and energy per photon. frequency: S-1 Incorrect In scenario D, visible light has a photon energy of 4.160 x 10-19 J. Determine its wavelength, frequency, and color. frequency: Incorrect S-1 wavelength: Incorrect energy per photon: wavelength: Incorrect The visible light in scenario D is Incorrect blue. nm nm

Answers

Scenario C: Visible light is in the middle of the yellow region of the visible spectrum. Here, we have to estimate its wavelength, frequency, and energy per photon. The wavelength of visible light in the middle of the yellow region of the visible spectrum is approximately 575 nm.

The frequency of the given light can be calculated by using the formula c = νλ where ν is the frequency of light, λ is the wavelength of light, and c is the speed of light. Hence the frequency is given by,ν = c / λν = 3.0 x 10^8 m/s / 575 x 10^-9 mν = 5.22 x 10^14 Hz. To calculate the energy per photon, we use the formula E = hc/λ where h is Planck's constant and c is the speed of light. E = hc/λE = (6.63 x 10^-34 J s) x (3.0 x 10^8 m/s) / (575 x 10^-9 m)E = 3.45 x 10^-19 J per photon.

Scenario D: Visible light has a photon energy of 4.160 x 10^-19 J. Here, we have to determine its wavelength, frequency, and colour. We can use the formula E = hc/λ to find the wavelength of light, where E is the energy of the photon. λ = hc/Let's substitute the given values.λ = (6.63 x 10^-34 J s) (3.0 x 10^8 m/s) / 4.160 x 10^-19 Jλ = 4.8 x 10^-7 m.

The frequency of light can be calculated using the formula c = νλ, where c is the speed of light.ν = c / λν = 3.0 x 10^8 m/s / 4.8 x 10^-7 mν = 6.25 x 10^14 Hz.

To determine the colour of visible light, we can use a chart that maps wavelength to colour. From the chart, it can be seen that the visible light of wavelength 480 nm is blue. Therefore, the visible light in scenario D is blue.

know more about wavelength,

https://brainly.com/question/31143857

#SPJ11

write the net ionic equation for the mixing of sodium iodide and the solution of lead(ii) nitrate.

Answers

The net ionic equation for the mixing of sodium iodide and lead(II) nitrate is:

Pb2+ (aq) + 2I- (aq) → PbI2 (s)

The net ionic equation for the mixing of sodium iodide (NaI) and lead(II) nitrate (Pb(NO3)2) can be determined by examining the dissociation of the compounds and identifying the ions involved in the reaction. Here's the breakdown of the reaction:

Sodium iodide (NaI) dissociates in water to form sodium ions (Na+) and iodide ions (I-):

NaI (aq) → Na+ (aq) + I- (aq)

Lead(II) nitrate (Pb(NO3)2) dissociates in water to form lead(II) ions (Pb2+) and nitrate ions (NO3-):

Pb(NO3)2 (aq) → Pb2+ (aq) + 2NO3- (aq)

When these two solutions are mixed, a double displacement reaction occurs, leading to the formation of a precipitate. The iodide ions (I-) from sodium iodide react with the lead(II) ions (Pb2+) from lead(II) nitrate to form solid lead(II) iodide (PbI2):

2Na+ (aq) + Pb2+ (aq) + 2I- (aq) + 2NO3- (aq) → PbI2 (s) + 2Na+ (aq) + 2NO3- (aq)

The net ionic equation is obtained by removing the spectator ions, which do not participate in the reaction. In this case, the spectator ions are the sodium ions (Na+) and nitrate ions (NO3-):

Pb2+ (aq) + 2I- (aq) → PbI2 (s)

Learn more about ionic equation here, https://brainly.com/question/13879496

#SPJ11

identify the reagents necessary to accomplish each of the following transformations Choose the orrect reaents from the following list: Enter the correct letter for each step of the reaction below.
(Reagents cannot be used more than once)
Reagent 1:
Reagent 2:
Reagent 3:
Reagent 4:
Reagent 5:
Reagent 6:
Reagent 7:
Reagent 8:
Reagent 9:
Reagent 10:

Answers

The reagents necessary to accomplish the following transformations are listed below:

Transformation 1
The transformation for this reaction is: CH3CH2CH(CH3)CH2CH3 -> CH3CH2CH2CH2CH3 Reagents used:
The reaction is an isomerization reaction that involves the shifting of the location of the methyl group. This reaction can be catalyzed by any of the three acidic catalysts: H2SO4, H3PO4, or BF3.

Transformation 2
The transformation for this reaction is: CH3CH2CH2OH -> CH3CH2CHO Reagents used:
The reaction is an oxidation reaction that involves the oxidation of alcohol to aldehyde. This reaction can be catalyzed by PCC (Pyridinium Chlorochromate).

Transformation 3
The transformation for this reaction is: CH3CH2CH2OH -> CH3CH2CH2Br Reagents used:
The reaction is a substitution reaction that involves the substitution of hydroxyl group with bromine. This reaction can be catalyzed by any of the two reagents: PBr3 or SOCl2.

Transformation 4
The transformation for this reaction is: CH3CH2CH2Br -> CH3CH2CH(CH3)OH Reagents used:
The reaction is a substitution reaction that involves the substitution of bromine with the hydroxyl group. This reaction can be catalyzed by any of the two reagents: Mg and dry ether or NaBH4.

Transformation 5
The transformation for this reaction is: CH3CH2CH(CH3)OH -> CH3CH2CH(CH3)Br Reagents used:
The reaction is a substitution reaction that involves the substitution of the hydroxyl group with bromine. This reaction can be catalyzed by any of the two reagents: PBr3 or SOCl2.

Transformation 6
The transformation for this reaction is: CH3CH2CH(CH3)Br -> CH3CH2COOH Reagents used:
The reaction is an oxidation reaction that involves the oxidation of alkyl halides to carboxylic acid. This reaction can be catalyzed by any of the two reagents: KMnO4 or HNO3.

Transformation 7
The transformation for this reaction is: CH3CH2CH2OH -> CH3CH2CH(CH3)CH2OH Reagents used:
The reaction is a dehydration reaction that involves the removal of water from the compound. This reaction can be catalyzed by any of the two reagents: H2SO4 or H3PO4.

Transformation 8
The transformation for this reaction is: CH3CH2CH(CH3)CH2OH -> CH3CH2CH2CH2COOH Reagents used:
The reaction is an oxidation reaction that involves the oxidation of the secondary alcohol to carboxylic acid. This reaction can be catalyzed by any of the two reagents: KMnO4 or HNO3.

Transformation 9
The transformation for this reaction is: CH3CH2CH2OH -> CH3COCH3 Reagents used:
The reaction is an oxidation reaction that involves the oxidation of primary alcohol to ketones. This reaction can be catalyzed by any of the two reagents: PCC or CrO3.

Transformation 10
The transformation for this reaction is: CH3COCH3 -> CH3CH2COOH Reagents used:
The reaction is an oxidation reaction that involves the oxidation of the ketone to carboxylic acid. This reaction can be catalyzed by any of the two reagents: KMnO4 or HNO3.

know more about isomerization reaction

https://brainly.com/question/28191756

#SPJ11

which gas has the same density at 316 degrees and 1.50 atm that o2 gas has at 0 degrees and 1 atm?
a. SO2
b. N2
c. NO2
d. CO2
e. Cl2

Answers

The gas that has the same density at 316 degrees and 1.50 atm as oxygen (O2) gas at 0 degrees and 1 atm is (d) carbon dioxide (CO2). The solution to this problem requires knowledge of the combined gas law, which is given as: (P1V1/T1) = (P2V2/T2).

Where P = pressure, V = volume, and T = temperature in Kelvin (K).Oxygen (O2) gas at 0 degrees Celsius and 1 atm has a density of 1.429 g/L. The temperature and pressure can be converted to Kelvin and atm, respectively as:0 degrees Celsius = 273 K1 atm = 1.01325 barUsing these values, we can calculate the volume of O2 gas at the given conditions as follows:(1 atm * V) / (273 K) = (1.429 g/L)(1 atm * V) = (1.429 g/L) * (273 K)V = 0.0539 LAt 316 degrees Celsius and 1.50 atm, the density of carbon dioxide (CO2) is also 1.429 g/L. Therefore, using the combined gas law, we can calculate the volume of CO2 gas at these conditions as follows:(1.50 atm * V) / (589 K) = (1.429 g/L)(1.50 atm * V) = (1.429 g/L) * (589 K)V = 0.0494 LThis volume corresponds to the same density of O2 gas at 0 degrees Celsius and 1 atm. Therefore, the answer is (d) carbon dioxide (CO2).

To know more about gas visit:

https://brainly.com/question/31778762

#SPJ11

Other Questions
Did the Great Depression in Canada in the 20th century provideany economic lessons for government, business, or labour? Basketball is a better sport than golf. In basketball, there's constant action: the players are always moving, and so is the ball; there's also a lot of scoring. In golf, there's hardly any action: they occasionally swing at a ball, but the players mostly stand around chatting alad ride golf carts; they hardly move for themselves at all. a) Basketball gets better ratings than Golf on television b) Sports with more players involved at one time are better than those with fewer. c) Golf is an elitist sport. d) Golf should become more fast-paced with multiple players competing on the same course hole at the same time in physical stand-offs with each other. The rate of water usage for a business, in gallons per hour, is given by W(t) = 16te^t, where f is the number of hours since midnight. Find the average rate of water usage over the interval 0 < t < 5, rounded to the hundredths. Include units in your answer. QUESTION 10 Since the year 2000, the U.S. government has always been running a budget surplus. A. This statement is true. B. This statement is false. C. The federal budget is mandated by law to be balanced. D. The validity of this statement cannot be determined because the federal budget is top-secret. Determine all the critical coordinates (turning points/extreme values) of y = (x + 1)e^-x The differentiation rule you must use here is Logarithmic q_18 = 1 Implicit q _18 = 2 Product rule q _18 = 3 The expression for dy/dx = y simplifies to y' = e^-x (q_19x^2 +q_20x + q_21) The first (or the only) critical coordinate is at x_1 = q_22 Which of the following information is typically shown in a bond amortization schedule? a. Fair value of bonds. b. Carrying value of bonds. ________ processing occurs when a program runs from beginning to end without any user interaction.a. Hadoop b. Block c. Hive d. Batch You are designing a fancy rectangular brick channel to convey runoff from a subdivision. The design flowrate is 40 cfs, and the slope of the channel is 1/250. If the channel depth cannot be greater than 1.5 ft, whatis the minimum channel width to accommodate the design flow, assuming uniform flow? (Ans: 4.xx ft) if = 531 nm , what is the minimum diameter of the circular opening from which the laser beam emerges? the earth-moon distance is 384,000 km . european military build-ups included: increased military budgets increase of modern weapons blockades at sea fortification of boundaries build-up of navies Production Management: Give 3 to 4 advantagesWhat is a key advantage of an M/D/1 queue vs. an M/M/1queue? Find the length of side X in simple radical form with a rational denominator A student failed to carry out all of the procedural steps when doing this experiment. Would the following procedural variations result in an experimentally determined mole ratio of water to salt ? Would it be too low, too high or unaffected? a) the student did not use a dry beaker when obtaining the stock solution b) the student used a wet cuvette when determining the concentration of solution of unknown hydrate c) the student used the wrong wavelength, 430nm, during the measurement of the absorbance of unknown hydrate solution What is the volume of the larger rectangular prism?A. 648 cmB. 216 cmC. 192cmD. 72 cm An angle in standard position in the coordinate plane has a measure in radians of 0, and its terminal side is in Quadrant IV. The value of cos is 235 39 89 Part A What is the value of sin ? Drag a number into the empty box to create your answer. sin 0 =I 23 What is the range of guarantees on maturity and death benefits on segregated funds? A 50% to 100% of deposits B 50% to 75% of deposits 90% to 100% of deposits 75% to 100% of deposits D "I regret a lot of the moments," he tells me. "I lost itseveral times. Its not good for a leader to shout and I did. Iapologized to them. Im sure they forgave, but they never forgot." "Assume an investor with the coefficient of risk aversion A=6.To maximize her expected utility, she would choose the asset withan expected rate of return of _______ and a standard deviation of_____ what si the ratio of glyceraldehyde-3-phosphate gap to dihydroxyacetone phosphate as the variance of the difference scores increases, the t statistic gets closer to zero. T/F