If a sample of pure silver (ag) contains 3.35 x 10^22 atoms of iodine, how many moles of silver are in the sample?
a. 17.9 mol
b. 2.82 mol
c. 0.180 mol
d. 0.0556 mol

The anwer roght here is the last one d. 0.0556 mol. The next procedure says why this is right:

3.35 x 10^22 atoms x (1 mol / 6.02 x 10^23 atoms) = 0.0556 mol 

I hope this can help you greatly

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It would be true sodium reacts with water in a violent way