Two identical observation cells have the same internal volume. One cell is completely filled with a pure substance in its liquid state. The other is filled with the same substance in its gas state. The liquid is 240 times as dense as the gas. Which statement compares the contents of the two cells?
The liquid has 240 times the mass and 240 times the number of molecules.
Both cells contain the same mass and the same number of molecules.
The gas has 240 times the mass and 240 times the number of molecules.
The liquid has 240 times the mass, but both cells contain the same number of molecules.
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.