if-a-samples-mass-ratio-changes-after-a-reaction-what-can-be-inferred-about-the-

Question

If a sample's mass ratio changes after a reaction, what can be inferred about the sample?

Accepted Answer

A chemical change has occurred.

Answer

The sample's mass ratio remains fixed.

Answer

The sample is in a different physical state.

Answer

The sample has become a pure element.