2.2 A chemist is making a mixture that needs to contain 15% magnesium ions by mass. Calculate the mass of magnesium in 200 g of this mixture.

It takes 945.kj/mol to break a nitrogen-nitrogen triple bond. calculate the maximum wavelength of light for which a nitrogen-nitrogen triple bond could be broken by absorbing a single photon.

Determine the empirical formula for succinic acid that is composed of 40.60% carbon, 5.18% hydrogen, and 54.22% oxygen.

What is the effect of returning nuclear reactor cooling water back into bodies of water?