Asubstance that speeds up the rate of a chemical reaction is called
a. a catalyst
b. a substrate.
c. an enzyme.
d. both a and c

What was the procedure by which case united states vs lopez went to court

Which of these best describes an ionic bond?

Write a hypothesis that answers the lesson question, “while observing a chemical reaction, how can you tell which reactant is limiting? ” hypothesis: if a substance is the limiting reactant, then . . because . .