4.4 g of a gas at STP occupies a volume of 2.24 L. The gas can be:

At STP, 1 mole of any gas occupies a volume of 22.4 L 4.4 g of a gas at STP occupies a volume of 2.24 L Hence, the number of moles of gas =(22.4/2.24)=0.1 moles. 0.1 moles of a gas = 4.4 g. 1 mole of a gas =4.4×(1/0.1)=44 g. Thus, the molecular weight of gas is 44 g/mol. It is the molecular weight of CO2 (carbon dioxide) gas.

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