What is the percent hydrogen in ammonium sulfide

Concerning the 10.0 ml of 0.50 m nacl to 100 ml of solution: when a solution is diluted, does it change the number of moles dissolved?

If you add 10ml of hot water to 10ml of cold water and the change in tempature 8°c calculate how much energy is gained by the cold water

Which of these statements explains the difference between nuclear binding energy and the strong nuclear force ?