Pliss HELP ME only if you know the answer =] ​

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.

In an exothermic reaction, energy may be released to the surroundings in the form of question 4 options: heat light thermal all of the above

Find the midpoint of a segment with endpoints of 4-3i and -2+7i