Two identical sampling bulbs have the same internal volume and the same mass when empty. One bulb is completely filled with a pure substance as a liquid. The other contains the same substance as a gas filling the bulb. The bulb containing the gas has a smaller mass when filled.
Explain this difference in mass and what it shows about the densities of the two samples. Use ideas about particles in your answer.
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.