Question

Which statement is always true about conservation of matter? Please Highlight the correct response.

a) If a gas forms, the mass of a system decreases.
b) If a solid forms, the mass of a system increases.
c) The mass of a system does not change during a chemical reaction.
d) The mass of a system changes when a substance changes from liquid to gas, but it does not change in a chemical reaction.

Answer 1

The correct answer is option (C). The mass of a system does not change during a chemical reaction. Matter can change form, but cannot be created or destroyed. This means that the mass of the reactants must be equal to the mass of the products.

Step-by-step explanation:

The statement that is always true about the conservation of matter is c) The mass of a system does not change during a chemical reaction.

The law of conservation of mass states that the total mass of substances taking part in a chemical reaction is conserved during the reaction. Matter can change form, but it cannot be created or destroyed. This means that the mass of the reactants must be equal to the mass of the products.