Question

The density of a gas is 0.002g/mL at stp .its molar mass is?

Answer 1

Given,

Density (ρ) = 0.002 g/mL

Any gas at S.T.P means that it shall have a volume of 22.4 L or 22400 mL,

Volume (V) = 22400 mL

∴ ρ = Molar Mass/V

= 0.002 = M/22400

= 44.8 g = Molar Mass

Hence, Molar Mass is 44.8 g.

I hope this helps.