What is the power usage of device that uses 3.0A of current at a voltage of 120 V? How much energy ( in kilowatt-hours) does this device use if it is left on for 2.0hr?

In reversible reaction chemistry equilibrium is attained when the forward and reverse reactions are taking place at the same rate, thus, the concentrations of reactants and products remain the same. a reversible reaction is a chemical reaction where the reactants form products that, in turn, react together to give the reactants back. in irreversible reactions on the other hand, the reactants react to form the products, which cannot revert back into reactants.

Yeah give more information 

Ihonestly was looking for an answer not trying to give one