Question

A chemical formula written above or below the yield sign indicates:

A. that a gas is formed.

B. that the substance is used as a catalyst.

C. that heat must be supplied.

D. a reversible reaction.

Answer 1

B. that the substance is used as a catalyst. i took the test

Answer 2

I believe the correct answer from the choices listed above is option B. A chemical formula written above or below the yield sign indicates that the substance is used as a catalyst. I am certain with this answer. Hope this helps. Have a nice day.