If 115 g of a substance reacts with 84 g of another substance, what will be the mass of the products after the reaction?

The mass of the products after the reaction can be determined by the law of conservation of mass. This law states that matter cannot be created or destroyed, only transformed. Therefore, the total mass of the reactants before the reaction should be equal to the total mass of the products after the reaction.

Here are the steps to find the mass of the products:

1. First, find the total mass of the reactants. This is done by adding the mass of the first substance to the mass of the second substance.

   115 g (first substance) + 84 g (second substance) = 199 g

2. According to the law of conservation of mass, the total mass of the products should be equal to the total mass of the reactants. Therefore, the mass of the products after the reaction should also be 199 g.