Question

Which of the following statements about a catalyst is true?

Question 14 options:

A catalyst can be changed chemically during a reaction.

A catalyst can accelerate the rate of a reaction.

A catalyst can initiate a reaction.

A catalyst can be consumed during a reaction.
Question 15 (4 points)
Which of the following statements about a catalyst is true?
Question 15 options:

A catalyst can initiate a reaction.

A catalyst can accelerate a reaction.

A catalyst can be consumed during a reaction.

A catalyst can be changed during a reaction.
Question 16 (4 points)
According to the rate law, the reaction rate is directly proportional to the molar concentration of the reactant.
Question 16 options:
True
False
Question 17 (4 points)
A(n) _____ exists in the same physical state as that of the reaction it catalyzes.
Question 17 options:

heterogeneous catalyst

homogeneous catalyst

inhibitor

product
Question 18 (4 points)
Most chemical reactions consist of sequences of two or more simpler reactions.
Question 18 options:
True
False
Question 19 (4 points)
The potential energy of an activated complex is at a maximum.
Question 19 options:
True
False
Question 20 (4 points)
If a collision between molecules is very gentle, the molecules are
Question 20 options:

more likely to be oriented favorably.

less likely to be oriented favorably.

likely to react.

likely to rebound without reacting.
Question 21 (4 points)
Chemists can change the rate of a reaction by changing the concentrations of the reactants.
Question 21 options:
True
False
Question 22 (4 points)
Which of the following factors does not affect the rate of reaction?
Question 22 options:

The size of the container used.

The temperature at which the reaction is carried out.

The amount of the reactants.

The physical state of the reactants.
Question 23 (4 points)
A/An _____ is a substance that slows down the rate of a reaction.
Question 23 options:

catalyst

inhibitor

reactant

product
Question 24 (4 points)
The upward-sloped straight line of the graph below indicates which type of relationship between the concentration of H2O2 and the initial reaction rate?

Question 24 options:

indirect

direct

absolute

inverse
Question 25 (4 points)
The rate of a chemical reaction is defined as the change in concentration of a reactant or product in a given time interval.
Question 25 options:
True
False

10 of 25 questions saved

Answer 1

A catalyst initiates a reaction
_______________________

False

___________

Homogenous catalyst

_____________________


True

________


True

______


More likely to be oriented favorably

_________________________________

True

_______


Size of the container used

_________________________


Inhibitors

__________


24 don’t know

_____________


True...




Tried my best friend

Answer 2

14. A catalyst can be changed chemically during a reaction.

15. A catalyst can be changed during a reaction.

16. True

17. homogeneous catalyst

18. True

19. true

20. likely to rebound without reacting.

21. False

22. The temperature at which the reaction is carried out.

23. inhibitor

24. Don't know

25. True

Step-by-step explanation: