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

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.

A chemical formula written above or below the yield sign indicates that the substance is used as a catalyst. The answer is letter B.