Question

A sample of a perfect gas occupies a volume V at a pressure P and absolute temperature T. The mass of each molecule is m. Which of the following expressions gives the number of molecules in the sample ?

• A. $\frac{PV}{m}$
• B. $\frac{k}{PVT}$
• C. $\frac{m}{k}$
• D. $\frac{PV}{kT}$

Answer 1

Answer: (D)

$\frac{PV}{kT}$

Answer 2

PV = NKT Ž N = $\frac{PV}{KT}$