Question

1. Which of the following does NOT indicate that a chemical change may have taken place?

A. fracture formation
B. gas production
C. precipitate formation
D. energy transfer

2. What happens to matter during a chemical reaction?
A. matter is neither destroyed or created.
B. some matter is destroyed
C. some matter is created
D. some matter is destroyed and some is created.

Answer 1

1. Which of the following does NOT indicate that a chemical change may have taken place?
A. fracture formation
B. gas production
C. precipitate formation
D. energy transfer
it is (a.)