Air is made up of what percentage of each type of molecule?

At room temperature what happens to the average kinetic energy of the molecules of a solid, liquid, and a gas

How many grams of co(g) are there in 74.5 ml of the gas at 0.933 atm and 30o c?

A5.000 g sample of niso4 h2o decomposed to give 2.755 g of anhydrous niso4. what is the formula of the hydrate? what is the full chemical name for the hydrate? what is the molar mass of the hydrate? niso4•_h2o what is the mass % of water in the hydrate?