Question

How many moles are there in 1.3 x 1024 atoms of Calcium?

A. 0.05 moles of Ca
B. 84.18 moles of Ca
C. 2.2 moles of Ca
D. 3.5 x 10-24 moles of Ca

Answer 1

Number of moles in 6.23 * 10^23 atoms = 1
So, in 1.3 * 10^24 = 1.3 * 10^24 / 6.23 * 10^23
= 2.2 Moles

In short, Your Answer would be Option C

Hope this helps!