Question

What is the mass of 2 litres of nitrogen at 22.4 atmospheric pressure and 273K

• A. 28g
• B. $14 \times 22.4$g
• C. 56 g
• D. None of these

Answer 1

Answer: (A)

28g

Answer 2

$\mu = \frac{PV}{RT} = \frac{22.4 \times 1.01 \times 10^{5} \times 2 \times 10^{- 3}}{8.31 \times 273} \approx 2$

Ž Mass of 2litre nitrogen

Ž m ´ M = 2 × 14 = 28 gm.