Which statement is true? a. energy can be created or destroyed. b. electrical energy is created from other forms of energy. c. energy in a battery makes new energy called electrical energy. d. stored energy in a battery can be transformed into electrical energy.

Liquid ammonia is produced at high temperatures and under great pressure in a tank by passing a mixture of nitrogen gas and hydrogen gas over an iron catalyst. the reaction is represented by the following equation. n2(g) + 3h2(g) → 2nh3(g) changing all but one experimental condition will affect the amount of ammonia produced. that condition is a) increasing the concentration of both reactants b) changing the temperature within the tank c) decreasing the pressure within the tank. d) increasing only the amount of nitrogen present.