(a)[2]
The kinetic theory of gases rests on several assumptions about gas molecules. State the assumption linked to the molecules' volume.
(b)
An ideal gas has a volume of $2.40 \times 10^{-2}\text{ m}^3$ at a pressure of $4.60 \times 10^{5}\text{ Pa}$ and a temperature of $23^{\circ}\text{C}$.
(b(i))[3]
Calculate how many molecules are in the gas.
(b(ii))[3]
Each molecule has a diameter of about $3 \times 10^{-10}\text{ m}$. Estimate the overall volume of the gas molecules.
(c)[1]
Using your answer in (b)(ii), explain why the assumption in (a) is reasonable.