Which of the following changes are chemical changes?

When baking soda and vinegar react, the surface bubbles. What does this most likely indicate?

Which property of physical changes explains why matter is conserved in a physical change?

If there are 8 g of a substance before a physical change, how much will there be afterwards?

What must be done to be certain that a chemical change has taken place?

When a substance changes states (melts, evaporates, etc.) it is often what type of change?

Which actions are evidence that a chemical reaction has occurred? Check all that apply.

Which of the following is a clue that a chemical change has taken place?