Chemistry College

Element A has two isotopes. The first isotope is present 19.52% of the time and has a mass of 265.1.
The second isotope has a mass of 182.27. Calculate the atomic mass of element A. (To two decimals
places)

Answers

Answer 1

The atomic mass of element A is 198.39 (to two decimal places).

To calculate the atomic mass of element A, we need to consider the relative abundance of each isotope and its corresponding mass. The atomic mass is the weighted average of the masses of all the isotopes, taking into account their relative abundance.

Given:

Isotope 1: Relative abundance = 19.52%, Mass = 265.1

Isotope 2: Relative abundance = 100% - 19.52% = 80.48%, Mass = 182.27

To calculate the atomic mass, we multiply the relative abundance of each isotope by its mass and sum up the results.

Atomic mass = (Relative abundance of Isotope 1 * Mass of Isotope 1) + (Relative abundance of Isotope 2 * Mass of Isotope 2)

Atomic mass = (19.52/100 * 265.1) + (80.48/100 * 182.27)

Calculating the values:

Atomic mass = (0.1952 * 265.1) + (0.8048 * 182.27)

Atomic mass = 51.72752 + 146.661296

Atomic mass = 198.388816

Rounding to two decimal places, the atomic mass of element A is 198.39.

For more such question on mass. visit :

https://brainly.com/question/24191825

#SPJ8

Related Questions

What are two types of fibres obtained from the fleece of a sheep? Which one is used to make wool?​

Answers

Answer: The two types of fibres obtained from the fleece of a sheep are beard hair, which are coarse and fine, and soft under hair, which grow near the skin. The under hair are used to make wool

Answer:

Answer: The two types of fibres obtained from the fleece of a sheep are beard hair, which are coarse and fine, and soft under hair, which grow near the skin. The under hair are used to make wool.

Explanation:

mark brainly please!

(I didn't copy the person above me! I just realized we had the same answer.)

If you have 2.60 X 1023 molecules of (NH4)3PO4, how many grams do you have?

Answers

If you have 2.60 x 10²³ molecules of (NH₄)₃PO₄, you have 64.7 grams of it.

The number of particles contained in a sample is measured in terms of the mole. One mole of a compound is the quantity of that substance that has a mass in grams equal to its relative atomic or molecular mass (atomic weight).To find the number of moles of (NH₄)₃PO₄, we'll need to use the Avogadro constant, which is 6.02 x 10²³. We can use the formula:moles = particles ÷ Avogadro constantThe number of particles is given as 2.60 x 10²³. Substituting the values:moles = 2.60 x 10²³ ÷ 6.02 x 10²³moles = 0.432Molar massNow that we have the number of moles of (NH₄)₃PO₄, we can compute its mass. The molecular mass of (NH₄)₃PO₄ is 149.0 g/mol. We can use the formula:mass = moles x molecular mass Substituting the values:mass = 0.432 x 149.0mass = 64.7 grams

For more such questions on molecules

https://brainly.com/question/475709

#SPJ8

help please! predict whether each substance will dissolve in water.

Answers

The compound n - hexane as shown does not dissolve in water.

Why does n - hexane not dissolve in water?

Due to a large difference in polarity between the two compounds, n-Hexane does not dissolve in water.

Water is a polar molecule, which means that one end of it (the hydrogen side) has a slight positive charge and the other end (the oxygen side) has a slight negative charge. The unequal distribution of electrons within the water molecule, which produces a dipole moment, is the cause of this polarity.

N-Hexane, on the other hand, is a nonpolar molecule. The electrons are uniformly distributed throughout the molecule, which is made up of carbon and hydrogen atoms bound together in a straight chain. N-Hexane lacks a substantial dipole moment as a result.

Learn more abaout hexane:https://brainly.com/question/30364285

#SPJ1

Other Questions
You are evaluating the possibility that your company bids $150,000 for a particular construction job. (a) If a bid of $150,000 corresponds to a relative bid of 1.20, what is the dollar profit that your company would make from winning the job with this bid? Show your work. (b) Calculate an estimate of the expected profit of the bid of $150,000 for this job. Assume that, historically, 55 percent of the bids of an average bidder for this type of job would exceed the bid ratio of 1.20. Assume also that you are bidding against three other construction companies. Show your work. Find an equation of the line of intersection of planes below, and the acute angle between these two planes. P. : x + 2y z = 1 and P2 : x + y + z = 1. Liabilities Assets Cash $55,000 Current Liabilities $60,000 Accounts Receivable $30,000 Common Stock $200,000 Inventory $70,000 Retained Earnings $125,000 Land $30,000 Building $200,000 Total Assets $ As discussed in class, Zappos has experimented with a unique organizational structure termed 'holacracy'. If you were an employee of an organization that suddenly switches over to a 'flatarchy' (no lines of reporting at all and everyone works in their own 'circle' , as at Zappos), what is the biggest problem you would experience ? You are free to offer your own perspective on the issue ; if you feel that there would be no problem at all in working in a 'holacracy', explain why you believe this is so. T/F : if a set s = {u1,...., up} g has the property that ui*uj uj d 0 whenever i j , then S is an orthonormal set A company reports the following income statement and balance sheet information for the current year:Net income$429,000Interest expense75,700Average total assets5,150,000Determine the return on total assets. The U.S. government provided substantial fiscal stimulus from spring of 2020 to summer 2021. During this time, public health interventions reduced the production of services, but not of goods. Use the AS/AD framework to answer the following questions. a) How should the stimulus policies be represented in aggregate demand and aggregate supply? On a graph, show how the curves shift when the stimulus goes into effect in a recession. Show how the increase in spending is reflected in the AD and AS equations. b) Explain (using graphs and simple equations) how inflation and output might respond to the expenditure increase. c) Your answer to part b shows how inflation and output change over time. Explain how consumption (C/Y) and investment (1/) change at over the same period. (Use the IS-MP diagram to help explain.) d) In response to the Covid-19 lockdowns, the Fed lowered the fed funds rate (which had only been recently raised). Use your AS/AD model to explain how this would affect output and inflation in the absence of the stimulus payments. Revise the following sentences to avoid confusing jargon, slang, clichs, and wordiness.1 Our manager insists that we must think outside the box in promoting our new kitchen tool.2 Although we got burned in the last contract, you can be sure we will stand our ground this time.3 Beyond the shadow of a doubt, our lousy competitor will make another snarky claim that is below the belt.4.If you refer back to our five-year plan, you will see that there are provisions for preventing blowing the budget.5.Btw, have you heard the latest buzz about hackers ripping off customer info from best buy? French andRaven (1959) developed a taxonomy to classify different types ofpower according to their source. This taxonomy includes fivedifferent types of power (Listandexplain those fivetypes). When considered as a root cause for cancer, which of the following is linked to at least 17 types of human cancer? eating a low-fat diet ALL OF THESE smoking eating a high-fat diet not exercising regularly Consider functions f(x) = x and g(x) = e-* defined on C[-1,1]. Use the inner product (f.g) = ('.f(x)g(x)dx to find: a) Distance d(f.g). b) "Angle" between f and g. Janet has $4,000 in undergraduate education expenses. Which of the following is her best choice for a tax credit based on this, if her adjusted gross income is $50,000? a. Student interest deduction b. American Opportunity Credit c. Student tuition deduction d. Lifetime Learning Credit ..... is a credit reference letter written by the depositor's bank. On February 1, 2021, Arrow Construction Company entered into a three-year construction contract to build a bridge for a price of $8,240,000. During 2021, costs of $2,080,000 were incurred with estimat Use the following information for the next two items: On June 30, 2019, Ledsen Corporation leased a vehicle to Sleeping Co. Ledsen Corporation had purchased the vehicle on that day for its fair value of P89,721. The lease agreement, which cost Ledsen Corporation P1,457 to have drawn up, contained the following. Lease term - 4 years Economic life of vehicle - 6 years Annual payment, payable in advance on June 30 each year - P23,900 Estimated residual value at end of lease term - P15,000 Residual value guarantee - P7,500 Interest rate implicit in the lease (known to Sleeping) - 7% Sleeping's incremental borrowing rate - 8% Included in the annual payment is an amount of P1,900 to cover reimbursement for the costs of insurance and maintenance paid by the lessor. The asset will be returned to the lessor at the end of the lease term. Sleeping Co.'s fiscal year end is June 30. Note: Round off present value factors to four decimal places. Round off amounts to the nearest peso. Based on the information above, answer the following: 1. How much is the initial measurement of the right of use asset?2. What is the current portion of the lease liability as at June 30, 2020? true/false. using evidence-based practice, what screening would you need to make to ensure these patients are getting adequate care and health promotion. Why might some immigrant parents be especially conservative in their attitudes toward their children dating? The parents' cultural or religious values might have limited their own dating opportunities, and therefore their knowledge of typical dating practices. Immigrant parents typically come from liberal cultural backgrounds, and therefore "tone down" their attitudes, but to too great an extent. Immigrant children have a limited pool of other immigrants to date, so it's easier to just not date at all. N O Most immigrant parents fear their children will be rejected by majority group dating partners, so they want to protect their feelings. A student wait to see if the correct answers to multiple chole problems are evenly distributed. She heard a rumor that if you don't know the answer you should always pick C. In a sample of 100 multiple choice questions from prior tests and quickes, the distribution of correct answers are given in the table below. In all of these questions, there were four optiote (A, B, C, D) Correct Atwets (n = 100) A B C D Count 12 21 31 The Test: Tat the clinim that correct answers for all multiple choice questions are not evenly dis tributed. Test this claim at the 0.06 significance loved one population mean A sample of 38 items is chosen from a normally distributed population with a sample mean of x = 12.5 and a population standard deviation of S = 2.8. a. At the 0.05 level of significance test the null hypothesis that the population mean is less than 14. b. find a 95% confidence interval QUESTION 1 Which one of the following is not a requirement for or a characteristic of perfect competition? A. all market participants should have perfect knowledge of market conditions. B. the good must be homogeneous. C. there should be no government intervention. D. every firm must have the power to set its price. 36.ROA (return on assets) is measured by Earnings beforeinterest & tax / Average total assetsAssume ROA is less than 100% and that the cash balance remainspositive.State the effect the followi