Free Printable Exam 3 Review

1.

Which of the following is the correct formula for calculating molarity?

a)

moles/liters of solution

b)

moles/kg of solvent

c)

# particles/Avogadro's #

d)

theoretical yield/actual yield

2.

Which noble gas has the highest boiling point?

a)

Xe

b)

Kr

c)

Ar

d)

He

3.

What are the correct coefficients for this balanced equation?
___Na + ___NaNO3 ___Na2O + ___N2

a)

6; 5; 2; 9

b)

3; 9; 3; 4

c)

10; 2; 6; 1

d)

1; 1; 1; 1

4.

You need to make 10.0 L of 1.2 M KNO₃. What molarity would the potassium nitrate solution need to be if you were to use only 2.5 L of it?

a)

6.7 M

b)

4.8 M

c)

5.2 M

d)

7.6 M

5.

LiOH + KCl -> LiCl + KOH

A scientist began this reaction with 20 grams of lithium hydroxide and an unlimited amount of KCl. What is the theoretical yield of lithium chloride (grams)?

a)

10 g LiCl

b)

125 g LiCl

c)

35 g LiCl

d)

58 g LiCl

6.

Is O₂ paramagnetic or diamagnetic?

a)

Paramagnetic

b)

Diamagnetic

7.

What is the concentration in molarity (M) of a solution made by dissolving 24 grams of glucose (C $_6$ H $_{12}$ O $_6$ , Molar mass = 180 g/mol) in enough water to make 2 liters of solution?

a)

0.0667 M

b)

0.133 M

c)

0.267 M

d)

0.533 M

8.

Is the PCl₃ molecule non-polar or polar?

a)

Polar

b)

Non-polar

9.

True or False? The higher the concentration of a solution the less solutes it has in it.

a)

True

b)

False

10.

Which of the following is a sign of a chemical reaction?

a)

Change in state of matter

b)

Change in temperature

c)

Dissolving of a substance

d)

Change in volume

11.

Which of the following molecules is nonpolar?

a)

$\text{CH}_4$

b)

$\text{NH}_3$

c)

$\text{H}_2\text{O}$

12.

Reactivity (bubbling, fizzing) is a --- property.

a)

Chemical

b)

Physical

13.

Balance the following equation: $\text{Fe} + \text{O}_2 \rightarrow \text{Fe}_2\text{O}_3$

a)

$2\text{Fe} + \frac{3}{2}\text{O}_2 \rightarrow \text{Fe}_2\text{O}_3$

b)

$4\text{Fe} + 3\text{O}_2 \rightarrow 2\text{Fe}_2\text{O}_3$

c)

$2\text{Fe} + 2\text{O}_2 \rightarrow \text{Fe}_2\text{O}_3$

d)

$3\text{Fe} + 2\text{O}_2 \rightarrow \text{Fe}_2\text{O}_3$

14.

Which of the following images represents a Trigonal Planar molecular geometry?

a)

b)

c)

d)

15.

What type of reaction is defined by a hydrocarbon reacting with oxygen to produce carbon dioxide and water?

a)

Addition

b)

Dehydration

c)

Hydrolysis

d)

Combustion

16.

Hydrocarbons will have which type of intermolecular forces?

a)

Dispersion

b)

dipole

c)

hydrogen bonds

17.

What is the hybridization of this molecule shown above

a)

sp

b)

sp²

c)

sp³

d)

sp⁴

18.

How many sigma bonds are in the following molecule?

a)

0

b)

1

c)

2

d)

5

e)

6

19.

Type of intermolecular force present in I₂, Br₂, and Cl₂.

a)

dipole dipole

b)

H-bond

c)

dispersion

d)

metallic

20.

Solubility, the ability to dissolve, is a --- property.

a)

Chemical

b)

Physical

Exam 3 Review

Total questions: 20

Worksheet time: 11mins

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