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  4. Which one of the following is the lightest?

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Q. Which one of the following is the lightest?

Some Basic Concepts of Chemistry

Solution:

Weight of $H _{2}=$ mole $\times$ molecular wt.
$=0.2 \times 2=0.4 \,g$
(b) $6.023 \times 10^{23}=1$ mole
Thus $6.023 \times 10^{22}=0.1$ mole
Weight of $N _{2}=0.1 \times 28=2.8 \,g$
(c) Weight of silver $=0.1 \,g$
(d) Weight of oxygen $=32 \times 0.1=3.2\, g$