# Chapter 2 Atoms, Molecules, and Ions - Study Questions - Page 95c: 64

a) $0.696\ mol$ b) $7.38\times10^{-3}\ mol$ c) $1.7\times10^{-5}\ mol$ d) $7.49\times10^{-3}\ mol$

#### Work Step by Step

Atomic weights: $Na: 22.990u,\ Sn: 118.71u,\ Pt: 195.08u,\ Xe: 131.29u$ a) $16.0\ g \div 22.990\ g/mol = 0.696\ mol$ b) $0.876\ g \div 118.71\ g/mol = 7.38\times10^{-3}\ mol$ c) $0.0034\ g \div 195.08\ g/mol = 1.7\times10^{-5}\ mol$ d) $0.983\ g \div 131.29\ g/mol = 7.49\times10^{-3}\ mol$

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