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  4. 84 g of a gas occupies the same volume as 96.00 g of oxygen under similar conditions of temperature and pressure. The molecular weight of the gas is ( O =16)

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Q. $84 \,g$ of a gas occupies the same volume as $96.00 \,g$ of oxygen under similar conditions of temperature and pressure. The molecular weight of the gas is $( O =16)$

Some Basic Concepts of Chemistry

Solution:

Equal volumes are occupied by equal number of moles of gases under identical conditions of temperature and pressure.

$\frac{84}{M}=\frac{96}{32}$

$ \Rightarrow M=28$