Question

Two substances are combined with each other. In this case, what does the conservation of mass mean? A. The two substances together have more mass before they are mixed. B. The two substances together have less mass before they are mixed. C. The resulting mixture has the same properties as the two substances. D. The two substances together have the same mass as the mixture.
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Answer 1

Answer:

$\boxed {\boxed {\sf D. \ The \ two \ substances \ have \ the \ same \ mass \ as \ the \ mixture}}$

Explanation:

The Law of Conservation of Mass states that matter/mass cannot be created or destroyed.

In a chemical reaction, this means that the mass of the reactants has to equal the mass of the products.

In this case:

• The reactants are the two substances.
• The product is the mixture.
• They have to have the same mass

Therefore, the best answer choice is D: The two substances have the same mass as the mixture.

Answer 2

The two substances together have the same mass as the mixture.