Answers:
_______________________
1) Which increase the rate of a chemical reaction?
___________________________________________
Answer: [A]: a catalyst .
___________________________________________
Note: A catalyst increases the rate of chemical reaction without altering the chemical reaction itself.
_______________________________________________
2) How does a catalyst appear in a chemical equation?
____________________________________________
Answer: [A]: it uses does usually appear in an equation.
____________________________________________
Note: Since a catalyst is not used up or changed during the chemical reaction, catalysts usually do not appear in a chemical equation.
{Occasionally, the catalyst is denoted above the "arrow" in the chemical equation, for emphasis that the catalyst was used."}.
___________________________________________
