Which statement correctly compares the sun and planets? A. Planets have an atmosphere; the sun does not. B. Planets gives off energy; the sun does not. C. Planets orbit the sun; the sun is at the center of the solar system. D. Planets are all made of solid materials; the sun is made of gases.

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.