Which statement describes the molecules in a reaction once it reaches equilibrium? A. They are mixed together but vary in concentration.
B. They continue to react.
C. They consist mainly of product molecules.
D. They are in motion but do not change.

Nitric oxide (no) can be formed from nitrogen, hydrogen and oxygen in two steps. in the first step, nitrogen and hydrogen react to form ammonia: n2(g) + 2 h_2(g) rightarrow 2 nh_3 (g) delta h = -92. kj in the second step, ammonia and oxygen react to form nitric oxide and water: 4 nh_3(g) + 5 o_2(g) rightarrow 4no(g) + 6 h_2o(g) delta h = -905. kj calculate the net change in enthalpy for the formation of one mole of nitric oxide from nitrogen, hydrogen and oxygen from these reactions. round your answer to the nearest .

What happened to the amount of carbon dioxide in the atmosphere from 2010–2017?

Which of the following units is not an official si unit? mole liter kilogram ampere