Question

1.47 litre of a gas is collected over water at 30∘C and 744mm of Hg . If the gas weight 1.98g and vapour pressure of water at 30∘C is 32mm , What is the molecular weight of gas?

Answer 1

w = 1.98g

V = 1.47 litre

T = 303 K

P = 744 - 32 = 712mm = 712760 atm

Since For dry gas , PV=wmRT

=712760×1.47=1.98m×0.0821×303

∴m=35.76g

Answer 2

Answer:

35.76 g

Explanation:

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