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Chemistry Final Exam Review 2020-2021

Total questions: 42

Worksheet time: 1hrs 21mins

Name
Class
Date
1.

What are the two REACTANTS in a combustion reactions?

a)

hydrocarbon and carbon dioxide

b)

hydrocarbon and oxygen

c)

carbon dioxide and water

d)

oxygen and carbon dioxide

2.

Which of these is a chemical property?

a)

The density of water is 1 g/mL

b)

Water's freezing point is 0 degrees Celsius.

c)

Calcium will react with water..

d)

Water is a gas at 105 degrees Celsius.

3.

Which of the following is NOT an example of a physical change?

a)

crumpling paper

b)

sharpening a pencil

c)

ice melting

d)

a nail rusting

4.

Convert this number into scientific notation: 0.068

a)

6.9 x 106

b)

6.8 x 10-9

c)

6.8 x 10-2

d)

None of the above

5.

Calculate the molar mass of Cu2O.

a)

37 g/mol

b)

45 g/mol

c)

79.5 g/mol

d)

143 g/mol

6.

Determine the mass of 4.20 moles of C6H12

a)

353 g

b)

0.0499 g

c)

337 g

d)

2.53 x 1024 g

7.

How many grams are in 1.2 x 1024 molecules of CO?

a)

28 grams

b)

56 grams

c)

6.0 grams

d)

1.2 grams

8.

Sulfur dioxide, SO2, is what kind of compound?

a)

ionic compound

b)

molecular compound

c)

metallic element

d)

non-metallic element

9.

What is the name of CCl4?

a)

carbon tetrachloride

b)

monocarbon tetrachloride

c)

tetracarbon monochloride

d)

carbon chloride

10.

What is the correct formula for sodium oxide?

a)

NaO

b)

NaO2

c)

Na2O

d)

Na2O2

11.

Name the following compound: FeCl3

a)

iron chloride

b)

iron(III) chloride

c)

iron trichloride

d)

monoiron trichloride

12.

MgF2 is the formula for which of the following?

a)

magnesium fluoride

b)

manganese difluoride

c)

magnesium(III) fluoride

d)

magnesium fluoride(II)

13.

Which of the following reactions represents solid sodium reacting with chlorine gas to produce solid sodium chloride?

a)

NaCl(s) → Cl (g) + Na (s)

b)

Na (s) + Cl2 (g) → NaCl2( s)

c)

2Na (s) + Cl2 (g) → 2NaCl (s)

d)

Na (s) + Cl (g) → NaCl (s)

14.

What type of chemical reaction will this be?

Al(OH)3 -->

a)

decomposition

b)

combustion

c)

synthesis

d)

single replacement

15.
Based on the activity series, will this reaction occur?
Au (s) + HCl (l) →
a)
Yes
b)
No
16.
What is the percent composition of Benzene, C6H6?
a)
C = 50%
H = 50%
b)
C = 85.7 %
H = 14.3%
c)
C = 92.2%
H = 7.8%
d)
C = 71.9%
H = 28.1%
17.

If a gas is at 0.95 atm, how many kPa is this?

a)

0.35 kPa

b)

1.07 kPa

c)

96 kPa

d)

400,025 kPa

18.

There are 65 liters of helium in a balloon at 35 K. If the temperature of the balloon is increased to 40 K, what will the new volume of the balloon be?

a)

40 L

b)

79 L

c)

74.3 L

d)

75.9 L

19.
A gas occupies 4.98 L at 2.6 atm of pressure. What volume does it occupy at 1.8 atm pressure?
a)
12.9 L
b)
0.72 L
c)
7.2 L
d)
3.44 L
20.

A rigid plastic container holds 1.00 L methane gas at 0.9 atm pressure when the temperature is 22.0°C. How much more pressure will the gas exert if the temperature is raised to 44.6°C?

a)

0.97 atm

b)

1.82 atm

c)

0.97oC

d)

1.82oC

21.

If the temperature of a gas increases, which of the following will happen?

a)

The molecules will move slower and will hit the walls of the container less.

b)

The molecules will move slower and will hit the walls of the container more.

c)

The molecules will move faster and will hit the walls of the container less.

d)

The molecules will move faster and will hit the walls of the container more.

22.
A neutral atom of the isotope 2612Mg would consist of
a)
12 protons, 26 neutrons, 26 electrons
b)
26 protons, 12 neutrons, 26 electrons
c)
26 protons, 14 neutrons, 14 electrons
d)
12 protons, 14 neutrons, 12 electrons
23.
What is the right ratio of chemicals for the BCE (Balanced Chemical Equation)?__CH4 + __O2 --> __CO2+ __H2O
a)
2,1 --> 2,1
b)
1,2 --> 1,1
c)
1,2 --> 1,2
d)
1,2 --> 2,1
24.

6CO2 + 6H2O --> C6H12O6 + 6O2

What is the total number of moles of water needed to make 2.5 moles of C6H12O6?

a)

2.5

b)

6

c)

12

d)

15

25.

Measure the volume using correct sig figs.

a)

63.5 mL

b)

63 mL

c)

63.55 mL

d)

6 mL

26.

You are given the following percentages: 40.05% S and 59.95% O. Find the empirical formula for these elements.

a)

SO

b)

SO2

c)

SO3

d)

SO4

27.

Which of these is an empirical formula?

a)

C6H12O6

b)

C12H22O11

c)

N2O4

d)

C2H6

28.
If 10 mg of iodine 131 is given to a patient, how much is left after 24 days? The half-life of iodine-131 is 8 days.
a)
1.25mg
b)
1.25g
c)
10g
d)
10mg
29.

When drawing the energy level diagram for carbon, where should the next arrow go?

a)

facing down in the first orientation of 2p

b)

facing up in the first orientation of 2p

c)

facing up in the second orientation of 2p

d)

facing down in the third orientation of 2p

30.
If the pressure exerted by a gas at 25 degrees C in a volume of 0.044 L is 3.81 atm, how many moles of gas are present?
a)
.002766 mole
b)
.0069 mol
c)
2.766 mol
d)
9.887 mol
31.
What is the molecular formula if the empirical formula is CH2O and the molecular molar mass is 180.18?
a)
CH2O
b)
C2H4O2
c)
C4H8O4
d)
C6H12O6
32.
The following is what type of reaction:
PbCl2 + AgNO3 → Pb(NO3)2 + AgCl
a)
Synthesis
b)
Decomposition
c)
Single Replacement
d)
Double Replacement
33.

Oxygen is a

a)

metal.

b)

nonmetal.

c)

metalloid.

d)

compound.

34.

How many orientations are there in the d orbital?

a)

1

b)

3

c)

5

d)

7

35.

A mole of carbon dioxide contains

6.02 x 1023 _____.

a)

grams

b)

formula units

c)

ions

d)

molecules

36.

This equation shows the radioactive decay of thorium (Th). Which of the following particles is released in this reaction?

a)

alpha

b)

beta

c)

neutron

d)

gamma

37.

Which of the following dimensional analysis setups will correctly convert 27.76 g of Li to atoms of Li?

a)

A

b)

B

c)

C

d)

D

38.

Which components of a fission reactor are used to slow neutrons during a fission reaction?

a)

moderators

b)

shields

c)

coolants

d)

control rods

39.

Frank has a paper clip. It has a mass of 9 g and a volume of 3 cm3. What is its density?

a)

3 g/cm3

b)

0.3 g/cm3

c)

27 g/cm3

d)

39 g/cm3

40.

What comes next in the electron configuration for chromium (Cr)?

1s2 2s2 2p6 3s23p64s2

a)

4p4

b)

3d4

c)

4f4

d)

1p4

41.
Which pair has the same empirical formula?
a)
NaCrO4 and Na2Cr2O7
b)
C2H4O2 and C6H12O6
c)
C3H6O3 and C2H6O2
d)
CH4 and C2H6
42.

Which orbital is filled after 2p?

a)

3p

b)

2d

c)

1p

d)

3s

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