Answer:
High pressure and low temperature, because particles are forced closer together and moving slower, so the volume of the particles is less significant
a group of unicellular microorganisms
147.2g
Explanation:
The full solution can be found in the image attached. Graham's law was applied to the problem. The rate of diffusion of a gas is inversely proportional to its molar mass or vapour density. Molar mass= 2vapour density