Given the equation representing a reaction at
equilibrium:
N2(g) + 3H2(g) <==> 2NH3(g) + energy
Which change causes the equilibrium to shift to
the right?
(1) decreasing the concentration of H2(g)
(2) decreasing the pressure
(3) increasing the concentration of N2(g)
(4) increasing the temperatur

Increasing the concentration of N2(g) will causes the equilibrium to shift to the right.Chemical equilibria can be shifted by changing the conditions that the system experiences. We say that we "stress" the equilibrium. When we stress the equilibrium, the chemical reaction is no longer at equilibrium, and the reaction starts to move back toward equilibrium in such a way as to decrease the stress.According to Le Chatelier's principle, a change in one of the variables that describe a system at equilibrium produces a shift in the position of the equilibrium that counteracts the effect of this change.In the synthesis of ammonia the equilibrium will shift to right only when we increase the concentration of N2(g). Because increasing nitrogen gas causes more ammonia to be produced, so the concentration of ammonia must increase.To know more about equilibrium shifthttps://brainly.com/question/11582988#SPJ1