wayground logo

Free Printable Worksheets

Font size

S
M
L
XL
Worksheets

First Semester Exam Pretest

Total questions: 120

Worksheet time: 2hrs 0mins

Name
Class
Date
1.
What is the formula for Boyle's Law?
a)
P1V1=P2V2
b)
P1V1/P2V2
c)
P1V2=P2V1
d)
P1/V1=P2/V2
2.
When Pressure increases then the Volume must...
a)
Increase
b)
decrease
3.
When Volume increases then Pressure must...
a)
Increase
b)
Decrease
4.
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
5.
A gas at a volume of 4 liters is at a pressure of 2 atm. The volume is changed to 16 Liters, what must the new pressure be?
a)
2 atm
b)
12 atm
c)
10 atm
d)
0.5 atm
6.
Which container will have a lower pressure?
a)
left
b)
right
c)
they both have the same pressure
d)
I don't know
7.
What type of relationship to pressure and volume have?
a)
direct
b)
inverse
c)
no relationship
d)
I don't know
8.

Charles's Law relates which 2 variables?

a)

pressure and volume

b)

temperature and pressure

c)

temperature and volume

d)

amount and volume

9.

What units are used to measure volume? CHECK ALL CORRECT ANSWERS

a)

Liters

b)

mL

c)

L

d)

Kelvin

e)

Celsius

10.

What units for temperature must be used in gas law equations?

a)

T

b)

Celsius

c)

Liters

d)

Kelvin

11.

What type of relationship is Charles' Law?

a)

Direct

b)

Inverse

12.

A balloon with 3L of air starts at a pressure of 233 kPa, then it rises several thousand feet to a pressure of 190 kPa. Which gas law would let you solve for the new volume?

a)
b)
c)
d)
13.

5. According to Charles Law, if Temperature of a gas increases Volume will also....

a)

Increases

b)

Stays the same

c)

Decreases

14.

10. A 500L container filled with a gas. This gas heated from 200K to 400K. If the pressure remains constant, what is the new volume of the container?

a)

250 L

b)

1000 L

c)

500 L

d)

2000 L

15.
Directly proportional means that as one value increases ....................
a)
the other stays the same 
b)
the other increases as well
c)
the other decereases
d)
the other goes to zero
16.
The word inverse means.......
a)
the same
b)
opposite 
17.

A gas occupies 900.0 mL at a temperature of 27.0 °C. What is the volume at 132.0 °C?

(a)  

18.

600.0 mL of air is at 20.0 °C. What is the volume at 60.0 °C?

(a)  

19.

What is the variable for V for idea gas laws

a)

mm Hg

b)

mL

c)

gallons

d)

L

20.

How can you convert from mL to L

(a)  

21.

What is the variable for T ideal gas

a)

K

b)

oC

c)

F

22.

How do you convert from oC to K

(a)  

23.

What are the variables we can use for P in ideal gas

a)

mm HG

b)

kPa

c)

Pa

d)

atm

24.

What is the variable for n in ideal gas

a)

g

b)

mol

25.

What does R stand for

a)

Ideal gas constant

b)

Real gas constant

c)

Temperature constant

d)

Ideal gas law

26.

Which is a correct unit for R?

a)

L.atm/mol.k

b)

L.atm

c)

mmHg/mol.K

d)

L.atom/mol

27.

What is the equation for Ideal Gas Law (hint what we have been studying)

(a)  

28.

1 atm =

a)

760 mm Hg

b)

920 mm Hg

c)

102 mm Hg

d)

786 mm Hg

29.

1 atm =

a)

1829 kPa

b)

91.9 kPa

c)

101.3 kPa

d)

111.3 kPa

30.
What pressure, in atm, is exerted by 2.50 L of gas containing 1.35 mol at 320 K?
PV=nRT
a)
14.19 atm
b)
16.53 atm
c)
18.42 atm
d)
22.54 atm
31.
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
32.
Determine the Kelvin temperature required for 0.0470 mol of gas to fill a balloon to 1.20 L under .998 atm pressure. 
a)
0 K 
b)
107 K 
c)
207 K 
d)
307 K 
33.
Calculate the volume that a 0.323-mol sample of a gas will occupy at 265 K and a pressure of 0.900 atm.
a)
7.18 L 
b)
7.81 L
c)
4.63 L
d)
4.36 L
34.
If the temperature of a gas increase, the pressure...
a)
Decreases
b)
Increases
c)
Does not change
35.
If a balloon is cooled what will happen to the volume?
a)
Volume will increase
b)
Volume will decrease
c)
Volume will not change
36.
Which container will have lower pressure?
a)
left
b)
right
c)
they both have the same pressure
37.

If a hairspray can is heated, what can be expected of the pressure of the gas inside the can?

a)

The pressure will increase

b)

The pressure will decrease

c)

The pressure will remain constant

d)

The pressure will equalize

38.
In order to convert to Kelvin, you add ______ to the Celsius measurement.
a)
372
b)
273
c)
237
d)
732
39.

Pressure is

a)

defined as the mass that an object exerts when at rest.

b)

not a measurable in gases.

c)

defined as the number of moles of substance divided by the mass of the substance.

d)

created by the force of the gas particles impacting the walls of the container.

40.

A student inflates a balloon with helium then places it in the freezer. The student should expect

a)

the balloon's volume to increase

b)

the balloon's volume to decrease

c)

the balloon's moles to increase

d)

the balloon's moles to decrease

41.
Which of the following would increase the (gas) pressure of a system?
a)
Increase the Temperature
b)
Pump in more gas
c)
Decrease the volume
d)
All of these
42.
You have a gas that has a pressure of 2 ATM and a volume of 10L.  What would be the new volume if the pressure was changed to 1 ATM?
a)
5 L
b)
20 L
c)
It would stay at 10L
d)
1 L
43.
If I have 5.6 liters of gas in a piston at a pressure of 1.5 atm and compress the gas until its volume is 4.8 L, what will the new pressure inside the piston be?
a)
1.75 atm
b)
1.8 atm
c)
1.3 atm
d)
1.29 atm
44.
A sample of gas with a volume of 30.0 mL at 25.0oC is heated to 50.0oC.  What is the new volume of the gas?
a)
60.0 mL
b)
15.0 mL
c)
27.5 mL
d)
32.5 mL
45.
A sample of oxygen gas has a volume of 150.0 mL when its pressure is .947 atm. What will the volume of the gas be if it is lowered to a pressure of 0.658 atm and the temperature remains constant?
a)
72 mL
b)
144 mL
c)
216 mL
d)
288 mL
46.
Determine the initial temperature of a random gas when the initial volume is 2.2 L and it is cooled to 88K with a volume of 0.85 L. 
a)
0.029 K
b)
0.021 K
c)
227.76 K
d)
34 K
47.
When the temperature is constant (k) inside a balloon, if you add pressure on it, the volume will ..... 
a)
Decrease
b)
Increase
c)
Not Change at all
d)
Particles will solidify 
48.
If a nitrogen gas occupies a volume of 500. ml at a pressure of 0.971atm. What volume will the gas occupy at a pressure of 1.50 atm, assuming the temperature remains constant?  
a)
324 ml
b)
728 ml
c)
772 ml
d)
None of the above
49.
A sample of a gas has a volume of 852 mL at 298 K. What temperature is necessary for the gas to have a volume of 945 mL?
a)
57.5⁰C
b)
57.5 K
c)
331 K
d)
330 ⁰C
50.
A sample of oxygen at 28.0°C has 340.0 kPa. What will its temperature be at 150.0 kPa?
a)
132.8 K
b)
132.8 °C
c)
682.2 K
d)
12.35 K
51.

IF we are using Boyles' law and our Pressure goes UP, what must our volume do?

a)

Go UP

b)

Go DOWN

c)

Stay the same

d)

Wrong law.

52.
What is the formula for Boyle's Law?
a)
P1V1=P2V2
b)
P1V1/P2V2
c)
P1V2=P2V1
d)
P1/V1=P2/V2
53.
What is the formula Charles' Law?
a)
V = T
b)
VT = VT
c)
T1 / V1 = T2 / V2
d)
V1 / T1 = V2 / T2
54.
What is 50 C in Kelvin?
a)
223
b)
323
c)
100
d)
50
55.
The volume of a sample of a gas at 273 oC is 200 liters. If the volume is decreased to 100 liters at constant pressure, what will be the new temperature of the gas?
a)
0 K
b)
546 K
c)
273 K
d)
100 K
56.
Gas Laws involve what three terms?
a)
Solid Liquid Gas 
b)
Speed Velocity Acceleration 
c)
Elements Compounds Mixtures 
d)
Pressure Temperature Volume 
57.
Is this equation balanced?
a)
yes
b)
no
c)
Not enough information
d)
Left side is balanced
58.
Fill in the blanks with coefficient:
PCl5+_ H2O→_ HCl+H3PO4
a)
4, 5
b)
1, 6
c)
3, 8
d)
2,2
59.
Which problem is balanced?
a)
PbO2 + 2H2--> H2SO4
b)
SO2 + H20 --> H2SO4
c)
2Na + 2H2O --> 2NaOH + H2
d)
2Na + 2H2O --> 2NaOH + H
60.
What is a coefficient?
a)
The small number on the right of the chemical symbol.
b)
The large number to the left of a formula.
61.
Balance this equation
_Zn+_HCl-->_ZnCl2 +_H2
a)
1,1,2,1
b)
1,1,1,2
c)
1,2,1,1
d)
2,1,1,1
62.
Balance this equation.
_Mg + _Cl2 --> _MgCl2
a)
1, 2,1
b)
already balanced
c)
2,1,1
d)
1,1,2
63.
How many atoms of aluminum are on each side of the following equation: 4Al + 3O2 --> 2Al2 O3
a)
2
b)
6
c)
1
d)
4
64.
The blue numbers in the image below represent ________
a)
Charges
b)
coefficients
c)
subscripts
d)
none of the answers are correct
65.
Finish a blalanced equation:
Mg(OH)2 --> __________
a)
Mg(OH)2 --> MgOH
b)
Mg(OH)2 --> MgO+ H2O
c)
Mg(OH)2 --> MgO+ H2
d)
Mg(OH)2 --> Mg+ H2O
66.
Balance this equation:
P4+O2  -->  P2O3
a)
3 P4+ O2 --> 2 P2O3
b)
 P4+ O2 --> 2 P2O3
c)
 P4+ 3 O2 --> 2 P2O3
d)
 P4+ 2 O2 --> 3 P2O3
67.
At the end of chemical reactions, what is the total mass of the reactants compared to the total mass of the products?
a)
the product is doubled
b)
the product is half the mass of the reactants
c)
the mass is the same
d)
the mass changes depending on the reaction
68.
Balance this equation,            
Al2O3 --> Al + O2 
a)
Cannot be balanced
b)
2Al2O3 --> 2Al+3O2 
c)
2Al2O3--> 4Al+3O2 
d)
3Al2O3--> 2Al+O2 
69.
Which elements are(is) not balanced?
LiNO3 +CaBr2 --> Ca(NO3)2 +  LiBr   
a)
Li
b)
Ca and Li
c)
O and N
d)
Ca
70.
Which of the following has the most number of O?
a)
2Mg3(PO4)2
b)
4AlPO4
c)
3Al(NO3)3
d)
15KOH
71.
Balance the equation:
Si(OH)4+NaBr--> SiBr4+NaOH
a)
Si(OH)4+2NaBr--> SiBr4+NaOH
b)
Si(OH)4+4NaBr--> SiBr4+4NaOH
c)
Si(OH)4+NaBr--> SiBr4+4NaOH
d)
Si(OH)4+2NaBr--> SiBr4+2NaOH
72.
N2 + H2 = NH4
a)
Balanced
b)
Unbalanced
73.
What does the Law of Conservation of Mass state?
a)
Matter cannot be gained or lost in a chemical reaction.
b)
Matter can only be lost in a chemical reaction.
c)
Matter can only be gained in a chemical reaction.
d)
Matter can be gained and lost in a chemical reaction. 
74.
What are the coefficient used to balance the equation below?
__Ag2O →__ Ag +___O2
a)
2,4,1
b)
1,1,1
c)
2,1,2
d)
2,2,2
75.

Balance this equation.

__SnO2 +__H2-->__Sn +__H2O

a)

1,1,2,1

b)

1,2,1,1

c)

1,2,1,2

d)

1,2,2,1

76.

Balance this equation.

__CF4 + __Br2 --> __CBr4 + __F2

a)

2,1,2,1

b)

1,2,2,1

c)

1,2,1,2

d)

2,2,2,2

77.

Balance this equation

__Al +__HCl -->__H2 +__AlCl3

a)

2, 6, 3, 2

b)

it is already balanced

c)

4, 12, 3, 4

d)

2, 1, 4, 5

78.

Balance this equation.

__CH4 + __O2 --> __CO2 + __H2O

a)

1,2,1,1

b)

2,1,2,1

c)

1,2,1,2

d)

0,2,0,2

79.
Which problem is balanced?
a)
PbO2 + 2H2
b)
SO2 + H20 --> H2SO4
c)
2Na + 2H2O --> 2NaOH + H2
80.
Is the equation balanced?: 2H2O + O2 --> 4MgO + 3Fe
a)
Yes
b)
No
81.

Balance this equation

__Zn +__HCl-->__ZnCl2 +__H2

a)

1,1,2,1

b)

1,1,1,2

c)

1,2,1,1

d)

2,1,1,1

82.

Balance this equation.

__Mg + __Cl2 --> __MgCl2

a)

1, 2,1

b)

already balanced

c)

2,1,1

d)

1,1,2

83.
KNO3 --> KNO2 + O2
What coefficients are needed to balance the reaction?
a)
2, 2, 1
b)
2, 3, 2
c)
1, 2, 2
d)
1, 3, 1
84.
Balance this equation-
__P4 + __O2 --> __P2O3
a)
it is already balanced
b)
2, 1, 3
c)
1, 2, 3
d)
1, 3, 2
85.

Balance this equation.

__Mg + __Cl2 --> __MgCl2

a)

1, 2,1

b)

already balanced

c)

2,1,1

d)

1,1,2

86.
Balance this equation.
_CH4 + _O2 --> _CO2 + _H2O
a)
1,2,1,1
b)
2,1,2,1
c)
1,2,1,2
d)
0,2,0,2
87.

Balance this equation

__Zn +__HCl-->__ZnCl2 +__H2

a)

1,1,2,1

b)

1,1,1,2

c)

1,2,1,1

d)

2,1,1,1

88.

__KNO3 --> __KNO2 + __O2

What coefficients are needed to balance the reaction?

a)

2, 2, 1

b)

2, 3, 2

c)

1, 2, 2

d)

1, 3, 1

89.

How many HCl molecules do you need to balance this equation?

2Mg + ​ (a)   HCl ---> 2MgCl2 + 2H2

Choose from the below words
4
1
2
3
90.

What coefficient should be used to make the following equation balanced?

N2+O2--> __?__NO

a)

1

b)

2

c)

3

d)

4

91.

Drag and drop the coefficients that balance this equation 2 FeFe   + ​ (a)   Cl2Cl_2  ---->  ​ (b)     FeCl3FeCl_3  

Choose from the below words
3
2
92.

Balance this equation ​ (a)   N2 + ​ (b)   H2 --> ​ (c)   NH3

Choose from the below words
1
3
2
93.

Balance this equation. _CF4 + _Br2 → _CBr4 + _F2

a)

3,1,2,1

b)

1,2,1,2

c)

2,2,2,2

94.
What is the total number of atoms present in 5Na3PO4
a)
5
b)
40
c)
55
d)
8
95.
Which of the following equations are correctly balanced?
a)

12CO2 +H2O --> C6H12O6 + O2

b)

CO2 + 9H2O --> C6H12O6 + O2

c)

CO2 + H2O --> 3C6H12O6 + O2

d)

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

96.

What's unbalanced about this equation? 

Al + O2 --> Al2O3

a)

Oxygen (O) only

b)

Aluminum (Al) only

c)

Both oxygen and aluminum

d)

Nothing; it is balanced.

97.

What is wrong with how this student balanced the equation?

Original equation: Ag + O2 ---> Ag2O

Solution: Ag + O2 ---> 2Ag2O

a)

They changed the molecular structure of the products/reactants.

b)

The silver (Ag) still isn't balanced.

c)

The oxygen (O) still isn't balanced.

d)

They left out the reactants.

98.

Balance this equation:

​ (a)   Fe + ​ (b)   O2 --> ​ (c)   Fe2O3

Choose from the below words
4
3
2
1
0
99.

What is the correct coefficient for Fe in the balanced equation below?

__Fe + 3O2 → 2Fe2O3

a)

4

b)

3

c)

1

d)

2

100.

Which of the following equations is NOT balanced?

a)

CaCO3 → CaO + CO2

b)

2K + Cl2 → 2KCl

c)

Na + H2O → NaOH + H2

d)

2H2 + O2 → 2H2O

101.

Using the following equation:

_Fe2O3(s) + 3H2(g) → 2Fe(s) + 3H2O(l)

How many moles of iron can be made from 6 moles H2?

a)

4 moles Fe

b)

6 moles Fe

c)

9 moles Fe

d)

2 moles Fe

102.

2 NaClO3 (s) → 2NaCl (s) +3 O2 (g)

12.00 moles of NaClO3 will produce how many grams of O2?

a)

64 g of O2

b)

576 g of O2

c)

288 g O2

d)

0.563 g O2

103.
2H2  +   O2  →  2H2O
How many moles of oxygen are consumed if 8 moles H2 are used?
a)

2

b)

4

c)

6

d)

8

104.
2 KClO3 → 2 KCl + 3 O2
How many moles of oxygen are produced when 6.7 moles of KClO3 decompose completely?
a)
6.7 mol
b)
1.0 mol
c)
10.1 mol
d)
4.5 mol
105.
Using the following equation:
Fe2O3(s) + 3H2(g) → 2Fe(s) + 3H2O(l)
How many moles of iron can be made from  6 moles H2? 
a)

4 moles Fe

b)

6 moles Fe

c)

9 moles Fe

d)

2 moles Fe

106.
Using the following equation:
Fe2O3(s) + 3H2(g) → 2Fe(s) + 3H2O(l)
How many moles of iron can be made from  6 moles H2? 
a)

4 moles Fe

b)

6 moles Fe

c)

9 moles Fe

d)

2 moles Fe

107.
2 NaClO3 (s) --> 2NaCl (s) +3 O2 (g)  
12.00 moles of NaClO3 will produce how many grams of O2?
a)

256 g of O2

b)

576 g of O2

c)

288 g O2

108.
Mg(s) + 2 HCl(aq)  -->  MgCl₂(aq)   + H₂(g)
How many moles of HCl are consumed in the production of 7.5 moles of MgCl₂?
a)

3.8 moles

b)

15 moles

c)

7.5 moles

d)

23 moles

109.
 CaC₂(s) + 2H₂O(l)   -->   C₂H₂(g)   + Ca(OH)₂(aq)
how many grams of Ca(OH)₂ would be formed with 3.20 moles of CaC₂?
a)

119 g

b)

21.2 g

c)

114 g

d)

237 g

110.
Use the following equation:
NaIO3(aq) + 6HI(aq) --> 3I2(s) + NaI(aq) + 3H2O(l)
How many moles of iodine can be made from 6.55 moles of NaIO3?
a)
4.55 moles I2
b)
23.18 moles I2
c)
19.65 moles I2
d)
34.99 moles I2
111.
Using the balanced equation in question 1,
Mg(s)   +   HCl(aq)  -->   MgCl₂(aq)   +   H₂(g)
How many grams of HCl are consumed by the reaction of 2.50 moles of magnesium?
a)
5.00 g
b)
7.29
c)
182 g
d)
218 g
112.
 Using the balanced equation in question 5, CaC₂(s)   +   H₂O(l)   -->   C₂H₂(g)   +   Ca(OH)₂(aq)
how many grams of H₂O are needed if 3.20 moles of CaC₂ are consumed?
a)

115 g

b)

28.8 g

c)

0.0889 g

d)

6.40 g

113.

Determine the mass of lithium hydroxide produced when 0.38 grams of lithium nitride reacts with water according to the following unbalanced chemical equation: Li3N (s) + H2O (l) → NH3 (g) + LiOH (aq)

(a)   g LiOH

114.

What mass of sodium chloride is produced when chlorine gas reacts with 0.29 grams of sodium iodide? The unbalanced equation is given below: NaI (s) + Cl2 (g) → NaCl (s) + I2 (g)

(a)   g NaCl

115.

Determine the mass of carbon dioxide produced when 0.85 grams of butane (C4H10) reacts with oxygen according to the following balanced chemical equation: 2 C4H10 (l) + 13 O2 (g) → 8 CO2 (g) + 10 H2O (g)

4 lines
116.

Determine the mass of antimony produced when 0.46 grams of antimony (III) oxide reacts with carbon according to the following balanced equation: Sb2O3 (s) + 3 C (s) → 2 Sb (s) + 3 CO (g)

4 lines
117.

Hydrogen peroxide decomposes to produce oxygen gas and water. What mass of hydrogen peroxide (H2O2) must decompose to produce 0.77 grams of water?

4 lines
118.

In the combustion of carbon monoxide, what mass of CO is required to produce 0.69 grams of carbon dioxide? The unbalanced equation is shown below: CO (g) + O2 (g) → CO2 (g)

4 lines
119.

Determine the mass of sodium nitrate produced when 0.73 grams of nickel (II) nitrate reacts with sodium hydroxide according to the following unbalanced chemical equation: Ni(NO3)2 (aq) + NaOH (aq) → Ni(OH)2 (aq) + NaNO3 (aq)

4 lines
120.

Determine the mass of calcium hydroxide produced when calcium carbide (CaC2) reacts with 0.64 grams of water according to the following balanced chemical equation: CaC2 (s) + 2 H2O (l) → Ca(OH)2 (aq) + C2H2 (g)

4 lines

Similar Resources on Wayground

Structure of the Atom (Chapter 4)

124 questions

Structure of the Atom (Chapter 4)

quiz

Worksheet

•

10th - 12th Grade

IGCSE CHEMISTRY: ORGANIC CHEMISTRY 2

125 questions

IGCSE CHEMISTRY: ORGANIC CHEMISTRY 2

quiz

Worksheet

•

9th - 10th Grade

Final Exam Practice Questions

123 questions

Final Exam Practice Questions

quiz

Worksheet

•

9th - 11th Grade

Unit 2 Test REVIEW

118 questions

Unit 2 Test REVIEW

quiz

Worksheet

•

9th - 12th Grade

7.5 Molecular Geometry Bank

122 questions

7.5 Molecular Geometry Bank

quiz

Worksheet

•

10th - 12th Grade

PS Unit 3 Review

115 questions

PS Unit 3 Review

quiz

Worksheet

•

10th Grade

2025 Midterm Exam Review

115 questions

2025 Midterm Exam Review

quiz

Worksheet

•

9th - 11th Grade

HPS Unit 5 & 6 Test

122 questions

HPS Unit 5 & 6 Test

quiz

Worksheet

•

9th - 12th Grade