The molecular mass of a gas is:

Q. The molecular mass of a gas is:
Answer: twice its vapour pressure
Notes: The molecular weight (molar mass) of any gas is the mass of one particle of that gas multiplied by Avogadro’s number (6.02 × 1023). It is twice its vapor pressure since the molecular mass of any gas is twice its density in relation to hydrogen which has 2 atoms in one molecule.

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