The density of air is 1.28 g litre^-1. Express it in:

(a) g cm^-3

(b) kg m^-3

The dimensions of a hall are 10 m x 7 m x 5 m. If the density of air is 1.11 kg m^-3, find the mass of air in the hall.

The density of alcohol is 600 kg m^-3. Express it in g cm^-3.

A piece of zinc of mass 438.6 g has a volume of 86 cm³. Calculate the density of zinc.