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Author Question: The natural abundance of calcium in the earth's crust is 3.4% by mass. How many calcium atoms are ... (Read 126 times)

ec501234

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on: Jul 8, 2021

Question 1

The mass number of an atom of 14C is:
◦ 6
◦ 20
◦ 8
◦ 14
◦ 10

Question 2

The natural abundance of calcium in the earth's crust is 3.4% by mass. How many calcium atoms are present in a 1.50 g sample of the earth's crust?
◦ 6.6 × 1023 atoms
◦ 3.1 × 1022 atoms
◦ 7.7 × 1020 atoms
◦ 7.7 × 1022 atoms
◦ 5.1 × 1020 atoms
General Chemistry: Principles and Modern Applications ¦ Petrucci, Herring, Madura, Bissonnette ¦ 11th Edition
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Marked as best answer by ec501234 on Jul 8, 2021

bitingbit

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Reply #1 on: Jul 8, 2021
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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ec501234

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Reply 2 on: Jul 8, 2021
Excellent

31809pancho

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Reply 3 on: Yesterday
:D TYSM

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