Question

The molar gas constant is the same for all gases because at the same temperature and pressure, equal volumes of gases have the same :

• A. number of molecules
• B. average potential energy
• C. ratio of specific heats
• D. density

Answer 1

The correct option is A number of molecules

We know, $R=\frac{PV}{nT}$
assuming P,V and T to be constant.
Also we know, that equal volume of gases contain equal number of molecules, hence the value of R is also constant.