how does oxygen form an ionic bond? *
it gains 2 electrons from a metal
it transfers 6 electrons to a nonmetal
it gains 8 electrons from a metal or nonmetal
it shares 2 electrons with another nonmetal

Answerit curves up and levels out.explanationwe assume that the container contains absolutely no ammonia to begin with as it states that "nitrogen gas and hydrogen gas" react to "produce ammonia."at dynamic equilibrium, the product and reactant concentrations are equal.this means that, starting from a concentration of zero, [nh₃] must curve "up" from zero and then level out to a constant concentration.

I'd say your answer would be the sides of a metal pan become hot when the pan is placed on the stove burner

The internal energy of the system we can term it as total potential energy and kinetic energy. energy flows out of the surrounding from the system then we can say that the internal energy of the final state is lower than its initials. the sign of  δesystem is negative.δesystem = efinal - einitial=-ve  efinal  ∠einitial.