6 A student has a mass of 6.35 x 10^1 kg. What number below is the
equivalent to the student's mass? *
O A. 6.35 x 10^-2 g
B. 6.35 x 10^4 g
O C.635 g
O D. 215 lb.
Answer:
B. 6.35 x 10^4 g
Explanation:
Quantities such as mass have more than units that are interconvertible. Mass can be measured in kilograms (kg), grams (g), etc.
However, 1kg equals 1000grams
Hence, a measurement of 6.35 x 10^1 kg will be equivalent to grams (g) by multiplying by 1000units
That is, 6.35 × 10^1 × 1000
= 6.35 × 10^1 × 10^3
Multiplication in index means to add the powers
= 6.35 × 10^ (1+3)
= 6.35 × 10^4grams
Therefore, an equivalent measurement of 6.35×10^1 kg is 6.35×10^4 g.
Plzzzzz help!!!!
Use complete sentences to differentiate between acids and bases on the basis of their behavior when dissolved in water. Give an example of each type.
Explanation:
Hey there!!
The differences between them are:
The acids are the substances which produces hydrogen ion dissolving in water. Eg: [tex]h2so4 = 2 {h}^{ + } + s {o4}^{ - - } [/tex]Base are the substances which produces hydroxyl ion while dissolving in water. Eg:[tex]naoh = {na}^{ + } {oh}^{ - } [/tex]Hope it helps....
Your lab partner accidentally spills some acid on his wrist and watchband. You should: (Check all that apply.)
Answer: Remove the watch and watchband immediately, and rinse his wrist for at least 15 minutes to be sure all hazardous material has been washed away. Let the TA inspect his wrist to see if it is okay.
Explanation:
The question is incomplete, the choices are:
a. Take him to the safety shower, and make sure he stands under it for at least 15 minutes to be sure all hazardous material has been washed away. b. Remove the watch and watchband immediately, and rinse his wrist for at least 15 minutes to be sure all hazardous material has been washed away. c. Let the TA inspect his wrist to see if it is okay.
d. Rinse the watch band before allowing him to put it back on.
An acid is traditionally considered to be any chemical compound that, when dissolved in water, produces a solution with greater hydronium cation activity than pure water, i.e., a pH less than 7. Both corrosive acids (and also corrosive bases) are capable of destroying skin by catalyzing the hydrolysis of fats, which are chemically esters. Also, when acids attack metals, hydrogen gas is often released.
This is why your lab partner should remove the watch and watchband immediately, and rinse his wrist for at least 15 minutes to be sure all hazardous material has been washed away. This ensures that the acid is can not damage the skin. And also the person should make sure that someone qualified checks it to see if it is okay.
1. For each of the following numbers, by how many places must the decimal point be
moved to express the number in scientific notation?
II. For each number, will the exponent be positive, negative, or zero?
0.0000089911
______is used in production of hard disk. 1 platinum 2 silver 3 gold
Answer:
Platinum
Explanation:
Tokyo, Japan is 8817.6 km from California. how many millimeters is this? answer in scientific notation.
Answer:
[tex]d=8.817\times 10^9\ mm[/tex]
Explanation:
It is given that,
Japan is 8817.6 km from California. We need to convert this distance in millimeters.
We know the conversion from km to mm is as follows :
1 km = 1000000
To convert mm km to mm use the unitary method as follows :
8817.6 km = 8817.6 × 1000000
[tex]d=8.817\times 10^9\ mm[/tex]
Hence, the distance between Japan and California [tex]8.817\times 10^9\ mm[/tex].
Convert 1.4 x 10-4 cm to decimeters
Answer:
1.4 x 10^-5 dm
Explanation:
Centimeters (cm) and decimeters (dm) are interconvertible S.I units of length.
- A centimeter is one-hundredth of a meter i.e. 100cm = 1m
- A decimeter is one-tenth of a metre i.e. 10dm = 1m
Based on this, a centimeter is one-tenth of a decimeter i.e. 1dm = 10cm
Hence, to convert 1.4 x 10^-4 cm to dm, we divide the value by 10
= 1.4 x 10^-4 ÷ 10
= 0.00014 ÷ 10
= 0.000014
Convert back to scientific notation by counting the decimal point forward to have: 1.4 x 10^-5
Hence, 1.4 x 10^-4 cm is equivalent to 1.4 x 10^-5 dm.
two difference between rhombic and monoclinic sulphur
Answer:
The key difference between rhombic and monoclinic sulphur is that the rhombic sulphur is the most stable allotropic form of sulphur that exists as rhombic octahedral crystals whereas the monoclinic sulphur exists as long, needle-shape prisms but, it is stable only at temperatures between 96◦C and 119◦C.
Explanation:
Thanks . I hope you got help
What is the speed of 550 meters per second in kilometers per second?
what are 2 examples of ethical research behaviour?
Answer:
Respect ConfidentialityExplanation:
*Hope this helps*
what is the color of the sun? (wrong answers only!) haha [drop ur instagram so we can be friends! :)]
Answer:
I need points for my Ap Calculs class
Explanation:
bsbsjsjsjd
Answer:
pink ;)
Explanation:
the.alyssayork
Round the following numbers to the number of significant figures indicated:
345 (2 s.f.) ___________
7850 (1 s.f.) ___________
24.68 (3 s.f) ___________
8.005 (3 s.f) ___________
0.005758 (3 s.f) ___________
1.25x1012 (2 s.f) ___________
Explanation:
Above we have simply looked the condition that where we put decimal point that gives your needed answer after round off.
For example:
we have to make 2 s.f from 345 so we kept decimal after 3 and we rounded off to make 3.5 from 3.45
Hope you got it
Which of the following is a unit of volume in the metric system? (5 points)
Gallon
Liter
Pint
Quart
A litre is a unit of volume in the metric system. Hence, option B is correct.
What is volume?Volume – How much space an object or substance takes up.
Measured in cubic meters (m3), litres (L) & millilitres (mL).
Volume is the measure of the 3-dimensional space occupied by matter, or enclosed by a surface, measured in cubic units.
The SI unit of volume is the cubic meter (m3), which is a derived unit.
Volume is the measure of the capacity that an object holds.
For example, if a cup can hold 100 ml of water up to the brim, its volume is said to be 100 ml.
Volume can also be defined as the amount of space occupied by a 3-dimensional object.
Hence, option B is correct.
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0.056 g/s = ? g/min
an atom has 23 protons, 25 neutrons and 23 electrons.
what is the element symbol
what is the atomic number
what is the mass number
Element symbol V
Atomic Number 23
Mass Number 50.9415
What is the atomic number?The atomic number is the number of protons in the nucleus of an atom.
Vanadium is a chemical element with the symbol V and atomic number 23. Classified as a transition metal, Vanadium is a solid at room temperature.
Hence,
Element symbol V
Atomic Number 23
Mass Number 50.9415
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Which of the following can be formed by physically combining pure substances? a. an element c. a compound b. a mixture d. all of the above
Answer:Which of the following can be formed by physically combining pure substances?a. an element c. a compound b. a mixture d. all of the above Weegy: It is true.The formula for Density is Mass divided Volume.
Explanation:
Answer:
It is B. a mixture
Explanation:
A is wrong because an element is part of a compound and can't be physically mixed, C is wrong because atm don't jin by just physically mixing then there must be a change in smething at the physical level
also correct on edg.
How many significant figures are in this number?
9.678 grams
Answer:
4 significant figures
Reason
The reason is count from 9 and all the decimal. it would be different if there was 0.09768.
WILL GIVE BRAINLETS
What is one element a topographic map shows? A.Climate B.Landforms C.Space D.Weather
Answer:
B
Explanation:
landforms.....this is it
the pencil is material or mixture ?please help
Answer:
mixture
Explanation:
What is the mass of 2.86 moles of silver (Ag)?
Answer:
308,4796 g.
Explanation:
1 mol equals to 107,86 g, now times 2,86 mol, 308,4796 g.
Hi! I need help on 1-4 ASAP! Thanks!
Answer:
5. a. false b. true c. false d. true e. false
6. it has to be something that can be supported or refuted through carefully crafted experimentation or observation
What does this diagram represent? (4 points) A glycerol molecule losing an H atom, and a fatty acid chain losing OH, forming H2O. 1. A saturated fat becoming unsaturated 2. A fat molecule forming through dehydration synthesis 3. The saturation of a triglyceride molecule 4. Dehydration synthesis breaking down a fat molecule
Answer:
This question is incomplete because of the absence of the diagram
Explanation:
The absence of the diagram makes the question incomplete, but it appears as if the content of the diagram has been described in the question (which is not totally clear).
The description provided in the question suggests the loss of a water during the formation of a triglyceride. This process described here is called dehydration synthesis. Dehydration synthesis is the process of joining two substances/compounds together leading to the loss of water molecule in the process.
From the explanation above, the correct option is 2. The fat molecule being formed is the triglyceride (through the process of dehydration synthesis).
As you move from left to right across a period, what happens to the atomic radil?
Answer:
Moving Across a Period
Moving from left to right across a period, the atomic radius decreases. The nucleus of the atom gains protons moving from left to right, increasing the positive charge of the nucleus and increasing the attractive force of the nucleus upon the electrons
How does carbon dioxide gas in the atmosphere cause climate change?
Chemists use letters of the alphabet as ____ for the elements.
Answer:
The symbol is the right answer.
Explanation:
The “ Symbol” is the correct answer because chemist uses the letters of the alphabet to denote the element. For instance, the element oxygen is denoted by the letter of the alphabet “O”, the hydrogen is denoted by the letter of alphabet “H”, Boron is denoted by the letter of alphabet “B”, etc. Here these are the examples that use one letter but there are other elements that use more than 1 letter as the symbol. For example, the Chlorine is represented by the Cl.
The letters of the alphabet are used by chemists as symbols in chemistry.
Symbols in chemistryThe “ Symbol” is the correct answer because the chemist uses the letters of the alphabet to denote the element. For instance, the element sulfur is denoted by the letter of the alphabet “S”, the hydrogen is denoted by the letter of the alphabet “H”. Other elements that use more than 1 letter as the symbol. For example, Chlorine is represented by the Cl.
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Which parallel runs through Canada
Answer:
The 49th Parallel and the 60th Parallel are the most significant.
What types of fertilizer will make grass grow greener?
Answer:
Milorganite 0636 Organic Nitrogen Fertilizer
Explanation:
According to gardenhelpful.com they list a few grass proudcuts to make your grass more green.
When 2891 is written in scientific notation, the exponent indicating the power of
10 is?
Answer:
For numbers less than 1, the power of 10 in scientific notation has negative exponent and for numbers greater than 1, the power is either zero or has positive exponent. Explanation of Solution The given number is 2891, to write the scientific notation, decimal should be placed after first non-zero digit.
Explanation:
Solid aluminum hydroxide is added to a solution of potassium phosphite.
Give the following
Complete reaction
Complete ionic equation
Net ionic equation
Answer :
The complete balanced equation will be,[tex]Al(OH)_3(aq)+K_3PO_3(aq)\rightarrow AlPO_3(s)+3KOH(aq)[/tex]
The complete ionic equation in separated aqueous solution will be,[tex]Al^{3+}(aq)+3OH^{-}(aq)+3K^{+}(aq)+PO_3^{3-}(aq)\rightarrow AlPO_3(s)+2K^+(aq)+3OH^{-}(aq)[/tex]
The net ionic equation will be,[tex]Al^{3+}(aq)+PO_3^{3-}(aq)\rightarrow AlPO_3(s)[/tex]
Explanation :
In the net ionic equations, we are not include the spectator ions in the equations.
Spectator ions : The ions present on reactant and product side which do not participate in a reactions. The same ions present on both the sides.
The complete balanced equation will be,
[tex]Al(OH)_3(aq)+K_3PO_3(aq)\rightarrow AlPO_3(s)+3KOH(aq)[/tex]
The complete ionic equation in separated aqueous solution will be,
[tex]Al^{3+}(aq)+3OH^{-}(aq)+3K^{+}(aq)+PO_3^{3-}(aq)\rightarrow AlPO_3(s)+2K^+(aq)+3OH^{-}(aq)[/tex]
In this equation, [tex]K^+\text{ and }OH^-[/tex] are the spectator ions.
By removing the spectator ions from the balanced ionic equation, we get the net ionic equation.
The net ionic equation will be,
[tex]Al^{3+}(aq)+PO_3^{3-}(aq)\rightarrow AlPO_3(s)[/tex]
An Olympic swimming pool is 50 meters long. You swim from one end to the other four times How many kilometers do you swim?
Answer:
You would swim 200 time's.
Hope this help's :)
An Olympic swimming pool is 50 meters long. You swim from one end to the other four times, and the kilometers that you swim are 200 kilometers.
What are meters and kilometers?Meters are kilometers are measurement units used to measure length. They are used to write the value of the measurements. There are seven basic units of measurement. The values are liters, kg, meters, grams, milliliters, etc.
Meter is a SI unit, it is denoted by small m, kilometers is unit of length which is denoted by km. The SI unit is the internation unit system of measurement.
One meter is equals to 1000 kilometers. An Olympic swimming pool is 50 meters long. A person swims 4 time of 50 kilometers.
So, 50 x 4 = 200 km.
Thus, the kilometers that you swim are 200 kilometers.
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