Question

The critical density of the gas CO2 is 0.44 g cm–3 at a certain temperature. If r is the radius of the molecule, r3 in cm3 is approximately. (N is Avogadro number)

• A. $\frac{25}{\pi N}$
• B. $\frac{100}{\pi N}$
• C. $\frac{6}{\pi N}$
• D. $\frac{25}{4N\pi}$

Answer 1

Answer: (C)

$\frac{6}{\pi N}$

Answer 2

VC = 3 × N × $\frac{4}{3}$p r3 × 0.44