Need help with 1,2,3 ASAP

Aconcentrated solution of ammonia is 14.8m and has a density of 0.899g/l. what is the concentration of ammonia in this solution in weight percent (%w/w)?

Atoms contain subatomic particles called protons and neutrons. when these protons and neutrons spilt, a lot of energy is released

The student repeated the experiment using a higher concentration of acid. the same volume of acid and the same mass of magnesium ribbon were used. what volume of hydrogen gas would have been produced after 60 seconds?