A sample of unknown gas at STP has a density of 0.50 g per liter. What is the gram molecular
mass of this gas?
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How do I estimate gas densities at STP?
Find the molar volume. At STP, one mole of an ideal gas will occupy 22.414 L. ...
Find the molar mass. You know the mass of one mole of each gas from its molecular weight.
Density is mass over volume, so dividing the molar mass by the molar volume gives you the density.
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