Question

#1: What happens to a catalyst as a result of a chemical reaction?

A. It is consumed.

B. It slows a chemical reaction.

C. It changes to something else.

D. It is not consumed.

***MY answer: D

@jim_thompson5910 is that right? :)

Answer 1

#2: What happens in a reaction if it is at chemical equilibrium?

A. The rate of the forward reaction exceeds that of the reverse reaction.

B. The rate of the reverse reaction exceeds that of the forward reaction.

C. The rate of the forward reaction equals the rate of the reverse reaction.

D. All of the products are used up.

***my answer; C

is this right? :)

Answer 2

#3: A chemical reaction is at equilibrium. What will be the effect if more of the product is added?

A. The reaction will shift to the left (toward the reactants).

B. There will be no effect; the reaction will stay at equilibrium.

C. The reaction will shift to the right (toward the products).

***my answer; A

is that right? :)

Answer 3

#4: Which of the following is likely to occur if more reactants are added to a reaction that is at chemical equilibrium?

A. There will be no effect; the reaction will stay at equilibrium.

B. The reaction will shift to the left (toward the reactants).

C. The reaction will shift to the right (toward the products).

***My answer: C

what do you think of this one? :D

Answer 4

# 1

http://en.wikipedia.org/wiki/Catalysis

"...Unlike other reagents in the chemical reaction, a catalyst is not consumed..."

Answer 5

#5: Consider the reaction 2NaN3 --> 2Na + 3N2, which is the first reaction that occurs when an air bag expands in a car undergoing a collision. This reaction happens very quickly, as you might suspect. A graph showing the amount of nitrogen gas (N2) could be best described as which of the following?

A. The graph line's general trend is absolutely horizontal.

B. The graph line's general trend is increasing from left to right.

C. The graph line's general trend is decreasing from left to right.

D. The graph line's general trend is nearly horizontal.

***i'm not too sure on this one.. what do you think? i'm leaning towards either B or D... :/

Answer 6

1D is correct

Answer 7

yay :)

Answer 8

# 2

http://en.wikipedia.org/wiki/Chemical_equilibrium

"In a chemical reaction, chemical equilibrium is the state in which both reactants and products are present at concentrations which have no further tendency to change with time.[1] Usually, this state results when the forward reaction proceeds at the same rate as the reverse reaction"

2C is correct

Answer 9

awesome !! :)

Answer 10

3A is correct

Answer 11

wootwoot :)

Answer 12

4 is the opposite, so that would be C, you got it

Answer 13

yayy :)

Answer 14

2NaN3 --> 2Na + 3N2

means you're going from 2NaN3 to 2Na + 3N2

Answer 15

so you start with 2NaN3 and end up with 2Na + 3N2

Answer 16

mhmm :)

Answer 17

idk what that means though :(

Answer 18

not very sure on this one :/

Answer 19

so that means we start out with no N2 and end up with a lot of N2

Answer 20

so the N2 amount is ______

Answer 21

ermm 2 ? ;/

Answer 22

yep, B. The graph line's general trend is increasing from left to right.

Answer 23

the amount of N2 is increasing as the airbag expands

Answer 24

okay! awesome :) thank you!! :D ahh i see :P

Answer 25

okay! awesome :) thank you!! :D ahh i see :P