Question

can i please have help

Answer 1

What is the expected outcome of adding a catalyst to a chemical reaction?

A.
The reaction will speed up.

B.
Chemical equilibrium will not be reached.

C.
The reaction will slow down.

D.
No change will occur.

Answer 2

i think it's B

Answer 3

can you please help me

Answer 4

look at your last post aand see what I said about a catalyst

Answer 5

you said a catalyst promotes a reaction

Answer 6

It is not B, because equilibrium can still be reached. The right answer is actually A. The reaction will speed up.

Answer 7

thank you i have a few more

Answer 8

Oh yeah, exactly. The catalyst will promote the reaction (speed it up).

Answer 9

Which statement describes chemical reactions that take place at different rates?

A.
One reaction produces more products than the other.

B.
One reaction begins with more reactants than the other.

C.
One reaction takes place in less time than the other.

D.
One reaction involves a color change and the other does not.

Answer 10

it's not D

Answer 11

The correct answer is C. If two reactions have different rates, one must be faster than the other.

Answer 12

unless they are very different reactions, but that is not specified in the question.

Answer 13

i have one more

Answer 14

sure

Answer 15

What action will slow down the rate of a reaction?

A.
Raising the temperature of the reactants

B.
Decreasing surface area of a solid reactant

C.
Increasing the concentration of the reactants

D.
Adding a catalyst to the reaction

Answer 16

it's not a

Answer 17

thank you for helping me

Answer 18

Since a catalyst speed up a reaction by reacting with the molecules, decreasing the surface area will limit the interaction with the molecules. Therefore the answer is B.

Answer 19

No problem.

Answer 20

i got 80%

Answer 21

hmm

Answer 22

Ashworth?

Answer 23

tell me what you got wrong. Ill help.

Answer 24

i can't go back and see what i got wrong

Answer 25

do you want to do 5 more or no

Answer 26

Which statement is a correct expression of the Law of Conservation of Mass?

A.
The total mass is unpredictable in a chemical reaction.

B.
The total mass remains the same during a chemical reaction.

C.
The total mass decreases during a chemical reaction.

D.
The total mass increases in a chemical reaction.

Answer 27

it's not C

Answer 28

or a

Answer 29

you still there

Answer 30

sorry

Answer 31

im back

Answer 32

Its B

Answer 33

Mas is conserved - that means it stays the same.

Answer 34

Yeah

Answer 35

Yeah

Answer 36

B is correct

Answer 37

So next question??

Answer 38

Which element(s) are not balanced in this equation?

Fe2O3 + 3 CO → Fe + 3 CO2

A.
Only the Fe is unbalanced.

B.
Only the O is unbalanced

C.
Fe and O are both unbalanced.

D.
C and O are both unbalanced

Answer 39

Fe is not balanced because the reactant has Fe2 and the product has only one Fe.

Answer 40

So im pretty sure its D.

Answer 41

u still on?