Vapour in a sealed cooling system condenses. The liquid occupies 0.100% of the volume previously occupied by the vapour and has a density of 1250 kg/m3. What was the density of the vapour, to three significant figures?
1250 kg/m31250\ \mathrm{kg/m^3}1250 kg/m3
1.25×106 kg/m31.25\times10^6\ \mathrm{kg/m^3}1.25×106 kg/m3
125 kg/m3125\ \mathrm{kg/m^3}125 kg/m3
1.25 kg/m31.25\ \mathrm{kg/m^3}1.25 kg/m3
87 exam-style questions on Edexcel GCSE Physics 14.1 Density and states of matter, covering 14.1.1 Kinetic theory and states of matter, 14.1.2 Density, and 14.1.3 Density and changes of state. Each one has a worked solution and a mark scheme showing where the marks go.