That's not true. The molar volume of a gas is always greater
than the molar volume of a liquid. I can't think of any exceptions
to this.
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Molar gas volume is the volume of ONE moel of gas. It only
depends on the pressure and temperature, not on the kind of gas.
Molar volume at standard temperature and standard pressure is
always 22,4 Litres (for any gas)
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The molar volume at STP(22.4 L/mol) can be used to calculate the molar mass of the gas.
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No. Specific volume is the inverse of density. Molar volume
specific volume divided by mols. (i.e. g/(mLxMols)