16How many neutrons are in the most common isotope of Ag?62What is the atomic mass of Magnesium?a.12b.30.97B. Nickel is a(n).element.a.inner transitionb.transition9. An element with 20 protons, 18 electrons, and 20 neutrons is a(n)?a.anionb.cation10. What is the normal charge on O as an ion? (Write the ion with a + or2-11. How many neutrons does an ion of Bromine with a -1 charge have?12. How many electrons does a typical Li ion have?Grade and SubmitStart Over

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16 How many neutrons are in the most common isotope of Ag? 62 What is the atomic mass of Magnesium? a. 12 b. 30.97 Nickel is a(n) element. a. inner transition b. transition 9. An element with 20 protons, 18 electrons, and 20 neutrons is a(n)? a. anion b. cation 0. What is the normal charge on O as an ion? (Write the ion with a + on 2- 11. How many neutrons does an ion of Bromine with a -1 charge have? 12. How many electrons loes a typical Li ion have?

16 How many neutrons are in the most common isotope of Ag? 62 What is the atomic mass of Magnesium? a. 12 b. 30.97 Nickel is a(n) element. a. inner transition b. transition 9. An element with 20 protons, 18 electrons, and 20 neutrons is a(n)? a. anion b. cation 0. What is the normal charge on O as an ion? (Write the ion with a + on 2- 11. How many neutrons does an ion of Bromine with a -1 charge have? 12. How many electrons loes a typical Li ion have?

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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17.A hypothetical element X is found to have an atomic mass of 37.45 amu. Element X has 2 isotopes, X -37 and X-38. The X- 37 has a fractional abundance of 0.7721 and an exact isotopic mass of 37.24. What is the isotopic mass of the second isotope?
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a. A fictitious element X has an average atomic mass of 122.264 u.122.264 u. Element X has two naturally occuring isotopes. The most abundant isotope has an isotopic mass of 121.752 u121.752 u and a relative abundance of 63.97%.63.97%. Calculate the isotopic mass of the least abundant isotope. b.Suppose that fictional element X has an average atomic mass of 75.531 u.75.531 u. Element X has two isotopes. One isotope has a mass of 72.203 u72.203 u and a percent abundance of 17.26%.17.26%. Calculate the mass of the second isotope. c. A 1.7878 g1.7878 g sample of sodium containing a mixture of Na23Na23 and Na22Na22 has an apparent "atomic mass" of 22.9743 u22.9743 u. Find the mass of Na22Na22 contained in this sample.
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As we saw in the previous problem, lithium has two naturally occurring isotopes: Li-6 (natural abundance 7.5%; mass 6.0151 amu) and Li-7 (natural abundance 92.5%; mass7.0160 amu). Without doing any calculations, determine which mass is closest to the atomic mass of Li. a. 6.00 amu b. 6.50 amu c. 7.00 amu
9. Lithium hydroxide crystals are used in manned space vehicles to remove carbon dioxide gas from the air exhaled by the astronauts. The symbolic equation for this reaction is 2LIOH + CO₂ → Li₂CO3 + H₂O a. The formula and charge of a lithium ion is Lit Deduce the formula and charge of the carbonate ion. Explain your answer. b. A space vehicle carries a crew of 7 astronauts. Each astronaut exhales 18 moles of carbon dioxide every day. Calculate the total number of moles of carbon dioxide that the crew will exhale during a mission into space which lasts 10 days. Show your working. c. Calculate the mass of lithium hydroxide crystals which must be loaded on board the space vehicle to react with all the carbon dioxide exhaled during the mission. Show your working.
Part B A certain element X has four isotopes. • 4.350% of X has a mass of 49.94605 amu. • 83.79% of X has a mass of 51.94051 amu. • 9.500% of X has a mass of 52.94065 amu. • 2.360% of X has a mass of 53.93888 amu. What is the average atomic mass of element X? Express your answer numerically to four significant figures. ► View Available Hint(s) 52.00 amu Submit Previous Answers Correct Part C What is the identity of element X from Part B? Express your answer as a chemical symbol.