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  4. The density in grams per litre of a mixture containing an equal number of moles of methane and ethane at STP is

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Q. The density in grams per litre of a mixture containing an equal number of moles of methane and ethane at STP is

Some Basic Concepts of Chemistry

Solution:

Suppose 1 mole of each $CH _{4}$ and $C _{2} H _{6}$ is there.

Mass of gaseous mixture $=16+30=46 \,g$

Volume of gaseous mixture $=2 \times 22.4=44.8 L$

Density $=\frac{46}{44.8}=1.03 \,g / L$