Question

Give one word or phrase for the following.
The ratio of the mass of a certain volume of a gas to the mass of an equal volume of hydrogen under the same conditions of temperature and pressure.

Answer 1

Vapour density:-

1. It is defined as the ratio of a certain mass of a gas or vapour to the mass of the same volume of hydrogen at, temperature and pressure.
2. It is given by the formula $\mathrm{Vapour}\mathrm{density}=\frac{\mathrm{mass}\mathrm{of}1\mathrm{molecule}\mathrm{of}\mathrm{a}\mathrm{subtacne}}{\mathrm{mass}\mathrm{of}1\mathrm{atom}\mathrm{of}\mathrm{hydrogen}.}$

Therefore, The ratio of the mass of a certain volume of a gas to the mass of an equal volume of hydrogen under the same conditions of temperature and pressure- vapour density