Question

1. The masses of equal volumes of a gas and hydrogen are 25.6 g and 0.8 g respectively under
same conditions of temperature and pressure. Find the molecular mass of the gas.
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Answer 1

Answer:32g

Explanation:

(In the question it is not specified whether it is hydrogen atm or molecule.Here I I'm considering hydrogen atom.)

Mass of hydrogen atom=0.8 gram Volume of the given mass of hydrogen=0.8 × 22.4 litre

Since the mass of hydrogen and the given gas is equal therefore the

volume of the given gas= (0.8 ×22.4 litre)

One mole of the gas weighs 2.56 / 0.8=32

Therefore the molecular mass of the given gas is 32 gram.