Most of the energy captured by photosynthesis is stored in chemical bonds in

Iknow the answer to 13 is b and 14 is d. i just need to know why the correct answers are correct

H2so4(aq) + mg(s)—> mgso4(aq) +h2(g) which substance is the acid in the reaction?

If i initially have a gas at a pressure of 12 atm, a volume of 23 liters, and a temperature of 200 k, and then i raise the pressure to 14 atm and increase the temperature to 300 k, what is the new volume of the gas?