Question

The density of air is 1.28 g/litre. Express it in:
i) $gc{m}^{-3}$
ii) $kg{m}^{-3}$

Answer 1

i) 1 litre = 1000 ml = 1000$c{m}^{-3}$
So, 1.28/1000$gc{m}^{-3}$ = 1.28 x ${10}^{-3}$ $gc{m}^{-3}$
ii) 1.28 $kg{m}^{-3}$