The illustration below shows a 1:1 mixture of neon (green) and krypton (blue) at 400 K.

What will be the illustration if the temperature of the mixture is lowered to 200 K?

Consider the sample below: 

Identify the flask below that has a pressure 3 times that of the sample above assuming constant volume and temperature.

Consider two identical clear flasks containing different gases at the same temperature (70 °C) and pressure. How can you differentiate bromine gas from helium gas under these conditions?