Question

a balanced chemical reaction obeys the law of
a ideal gases.
b definite proportions.
c conservation of matter.
d conservation of energy.

Explanation:

A balanced chemical reaction ensures that the number of atoms of each element is the same on both the reactant and product sides, which is in accordance with the law of conservation of matter stating that matter is neither created nor destroyed in a chemical reaction. The law of ideal gases relates to the behavior of gases, the law of definite proportions pertains to the fixed ratios of elements in a compound, and conservation of energy is about energy - not matter - in a reaction.

Answer:

C. conservation of matter