When 5 grams of salt dissolve in 30 grams of water, what is the resulting mass of the mixture?

The resulting mass would be 35 grams.

Explanation: Mass cannot be destroyed, there would be no need to re-measure the mass. Therefore, if we add the masses we get 35.

3

explanation:

every chemical equation adheres to the law of conservation of mass, which states that matter cannot be created or destroyed. therefore, there must be the same number of atoms of each element on each side of a chemical equation.