Can someone tell me how to find molecular mass using vapour density?
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molecuale mass = 2 × vapour density
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Vapour density is the density of a vapour in relation to that of hydrogen. It may be defined as mass of a certain volume of a substance divided by mass of same volume of hydrogen.
vapour density = mass of n molecules of gas / mass of n molecules of hydrogen.
Therefore:
vapour density = molar mass of gas / molar mass of H2
vapour density = molar mass of gas / 2.016
vapour density = ~½ × molar mass
(and thus: molar mass = ~2 × vapour density) For example, vapour density of mixture of NO2 and N2O4is 38. 3.Vapour density is a unitless quantity.
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vapour density = mass of n molecules of gas / mass of n molecules of hydrogen.
Therefore:
vapour density = molar mass of gas / molar mass of H2
vapour density = molar mass of gas / 2.016
vapour density = ~½ × molar mass
(and thus: molar mass = ~2 × vapour density) For example, vapour density of mixture of NO2 and N2O4is 38. 3.Vapour density is a unitless quantity.
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Turbo11:
thank you for the help
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