Based on the chemical equation, use the drop-down menu to choose the coefficients that will balance the chemical equation: ()h2o → ()h2 + ()o2

The coefficients are 2, 2 and 1.

Explanation: According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants.

The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.

The balanced chemical equation for the given reaction is:

the answer is barium and copper bromide