Paper 1 October/November 2016 CHEMISTRY (9701/11) IGCSE

The diagram shows the apparatus used to find the relative molecular mass of a volatile liquid.
When 0.10 g of a volatile liquid is injected into the syringe, all of the volatile liquid evaporates and the volume increases by 85 cm$^3$.
The heater maintains a temperature of 400K and the experiment is carried out at a pressure of 101 300Pa.
If the vapour of the volatile liquid behaves…