What is the mass (in g) of 5.43 moles of calcium sulfate

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

Ants live on acacia trees in south america. the ants feed on sugars secreted by the trees. the trees provide room for the ants to live. the ants sting any other insect or animal that comes to eat the trees. what type of relationship is this?

What is happening when the water inside a kettle heats up and begins to boil