(i). If the volume of a fixed mass of a gas is reduced to half at constant temperature the gas pressure doubles.
(ii). Boyle’s law also helps to relate pressure to density.
P1V1 = P3V3 (Boyle’s law)
\(P_1\frac{m}{d_1}=P_2\frac{m}{d_2}\)
Where ‘m’ is the mass, d1 and d2 are the densities of gases at pressure P1 and P2 . The density of the gas is directly proportional to pressure.