Calculate the weight of $C O_{2}$ , which occupies a volume of 11.2 dm $^{3}$ at STP.

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Solution

As we know,
One mole of gaseous substance occupies 22.4 litre $(22.4 d m^{3})$ .
here as $C O_{2}$ occupies 11.2 litre so mole of $C O_{2} = 22.4 / 11.2 = 1 / 2$ mole.
mass of 1/2 mole $C O_{2} = 44 / 2 = 22$ gm

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