Which of the following happens when a reaction reaches dynamic equilibrium in a closed system?

a. the concentrations of the reactants and products increase.

b. the concentrations of the reactants and products decrease.

c. the rate of the forward reaction equals the rate of the reverse reaction.

d. the rate of forward reaction is slower than the rate of the reverse reaction.

the rate of the forward reaction equals the rate of the receverse reaction

Explanation:

the equation that correctly represent the reaction for formation of ammonia is

n2+ 3h2 → 2nh3 (answer d)

1 mole of nitrogen gas (n2) react with 3 moles of hydrogen gas (h2) to form 2 moles of ammonia ( nh3). this is in a process known as haber process were iron is used as a catalyst and reaction take place that a higher temperature and pressure. the process is exothermic hence energy is released.

since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.