AnswersLA-Chemistry AIntroduction to Stoichiometry

Studying for Tests Answers

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Potassium permanganate (KMnO4) reacts with hydrochloric acid (HCl) to form potassium chloride (KCl), manganese chloride (MnCl2), water (H2O), and chlorine gas (Cl2). The balanced chemical equation is 2KMnO4 + 16HCl → 2KCl + 2MnCl2 + 8H2O + 5Cl2. Select the correct ratios of each of the following substances.KMnO4:KCl =

A
2:2
B
1:2
C
2:1
2
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HCl:H2O =

A
1:1
B
16:8
C
8:16
3

KMnO4:Cl2 =

A
2:1
B
5:2
C
2:5
4

HCl:MnCl2 =

A
1:2
B
16:2
5

Sequential note-taking is a good solution when you need to

A
record information to commit to memory.
B
make note of dates in chronological order.
C
show how concepts relate to each other.
D
identify any questions on the material.
6

What is one reason to create a study checklist?

A
to place main ideas on a graphic organizer
B
to make note of dates in chronological order
C
to show how concepts relate to each other
D
to identify any questions on the material
7

Peyton has a hard time studying because it can be difficult to see the pages of his textbook.

A
He can find a more comfortable chair.
B
He can create a well-organized area.
C
He can remove any possible distractions.
D
He can choose an area with more light.
8

Which best describes distractions in study environments?

A
It is hard to focus if a student is distracted.
B
Everyone is distracted by the same things.
C
Music is always a distraction while studying.
D
Friends are always a distraction while studying.
9

Kendrick has a hard time studying because it is difficult to find things on his crowded desk.

A
He can find a more comfortable chair.
B
He can create a well-organized area.
C
He can move to an isolated area.
D
He can have more resources available.
10

Why might a student create a study checklist? Select three options.to make note of all assignmentsto create a list of vocabulary termsto keep track of upcoming deadlinesto show how concepts are connectedto record ideas and details from a textbook

A
to make note of all assignments
B
to create a list of vocabulary terms
C
to keep track of upcoming deadlines
D
to show how concepts are connected
E
to record ideas and details from a textbook
11

For the reaction2Fe + 3Cl2 → 2FeCl3which of the following options gives the correct reactant:reactant ratio?

A
Fe:Cl2 = 1:1
B
Fe:Cl2 = 2:3
C
Fe:Cl2 = 3:2
D
Fe:FeCl3 = 1:1
12

Question text not available

A
0.835 mol O2
B
1.67 mol O2
C
3.34 mol O2
D
6.68 mol O2
13

A quantity of NH3 decomposes to produce 0.0351 mol N2. How many moles of H2 are produced?

A
0.0351 mol H2
B
0.0117 mol H2
C
0.105 mol H2
D
0.0702 mol H2
14

What is the main reason to create flash cards?

A
to record information to commit to memory
B
to place main ideas on a graphic organizer
C
to show how concepts relate to each other
D
to identify any questions on the material
15

Potassium permanganate (KMnO4) reacts with hydrochloric acid (HCl) to form potassium chloride (KCl), manganese chloride (MnCl2), water (H2O), and chlorine gas (Cl2). The balanced chemical equation is 2KMnO4 + 16HCl → 2KCl + 2MnCl2 + 8H2O + 5Cl2. Select the correct ratios of each of the following substances.KMnO4:KCl =

A
2:2
B
1:2
C
2:1
16

For the reaction2Fe + 3Cl2 → 2FeCl3which of the following options gives the correct reactant:reactant ratio?

A
Fe:Cl2 = 1:1
B
Fe:Cl2 = 2:3
C
Fe:Cl2 = 3:2
D
Fe:FeCl3 = 1:1
17

A quantity of NH3 decomposes to produce 0.0351 mol N2. How many moles of H2 are produced?

A
0.0351 mol H2
B
0.0117 mol H2
C
0.105 mol H2
D
0.0702 mol H2
18

Question text not available

A
Yes, and I got the correct answer.
B
Yes, but I got the wrong answer because I made a mathematical error.
C
No, I did not set up the equation correctly.
19

Question text not available

A
Yes, and I got the correct answer.
B
Yes, but I got the wrong answer because I made a mathematical error.
C
No, I did not set up the equation correctly.
20

For the reaction2C6H5COOH + 15O2 → 14CO2 + 6H2Owhich of the following options gives the correct product:product ratio?

A
CO2:H2O = 14:6
B
CO2:H2O = 6:14
C
CO2:H2O = 1:1
D
O2:H2O = 15:6

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