I really need help guys in order to pass this. its kinda urgent!

How would the number of moles (n) of o2 change if the atmospheric pressure doubled but all other variables stayed the same

Which process does not require the presence of a physical substance in order to transfer heat? air in the atmosphere is heated by the ground. this warm air then rises, and cooler air falls. this is an example of what type of process? how is conduction different from radiation?

Mary is conducting an experiment on how pollution affects plant growth. how can she ensure that her data are reliable?