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The ratio of the mass of a certain volum...

The ratio of the mass of a certain volume of gas to the mass of an equal volume of hydrogen under the same conditions of temperature and pressure is known as_______

A

Vapour density

B

Empirical formula

C

Molecular formula

D

Percentage composition

Text Solution

Verified by Experts

The correct Answer is:
A
Vapour density is the ratio of the mass of a volume of a gas, to the mass of an equal volume of hydrogen, measured under the same conditions of temperature and pressure. It is obtained by dividing the molecular weight of the vapour by the average molecular weight of air thus, it is unitless.
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