Question

Jack is performing an experiment using two compounds, Q and R. He puts compound Q and R in a test tube. The compounds then undergo a chemical reaction to form compounds S and T. Which of the following would be the strongest evidence to show that a chemical reaction has occurred?

A. The total mass of compounds S and T is equal to the total mass of compounds Q and R.

B. Compounds S and T have different melting points than compounds Q and R.

C. Compound S can be physically separated from compound T.

D. Compounds Q and R are both part of a mixture.

Answer 1

Hello! The answer would be (B.) Compounds S and T have different melting points than compounds Q and R. The reason it is the strongest evidence is because the chemical reaction created a new substance, hence the new melting point.

Answer 2

Answer: B. Compounds S and T have different melting points than compounds Q and R.

Explanation: It has the strongest evidence

Hope this helps!!!