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Author Question: Zinc has five naturally occurring isotopes, Zn-64, Zn-66, Zn-67, Zn-68 and Zn-70. Calculate the ... (Read 124 times)

JGIBBSON

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on: Nov 18, 2019

Question 1

Carbon has two naturally occurring isotopes, carbon-12 and carbon-13. The more common isotope of carbon is carbon-12 with an abundance of 98.93% while carbon-13 has an atomic mass of 13.00335 u. Calculate the atomic mass of carbon-12 if the atomic mass of carbon is 12.0107 u.
◦ 12.8 u
◦ 12.4 u
◦ 12.0 u
◦ 13.1 u
◦ 13.0 u

Question 2

Zinc has five naturally occurring isotopes, Zn-64, Zn-66, Zn-67, Zn-68 and Zn-70. Calculate the atomic mass of zinc given the following abundances and atomic masses for the isotopes:

Zn-6463.9291 u48.61%
Zn-6665.9260 u27.9%
Zn-6766.9271 u4.1%
Zn-6867.9248 u18.75%
Zn-7069.9253 u0.62%

◦ 64.8 u
◦ 66.3 u
◦ 65.4 u
◦ 65.1 u
◦ 66.7 u
Chemistry: A Molecular Approach (Canadian) ¦ Tro, Fridgen, Shaw ¦ 2nd Edition
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Marked as best answer by JGIBBSON on Nov 18, 2019

jsm54321

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Reply #1 on: Nov 18, 2019
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
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JGIBBSON

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Reply 2 on: Nov 18, 2019
Gracias!

xiaomengxian

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Reply 3 on: Yesterday
Excellent

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