wayground logo

Free Printable Worksheets

Font size

S
M
L
XL
Worksheets

Chemistry Review

Total questions: 70

Worksheet time: 15hrs 40mins

Name
Class
Date
1.

Is the following equation balanced?

4Fe + 3O2 ---> 2Fe2O3

a)

YES

b)

NO

2.
2 NH3+ 1 H2SO4 ----> 1 (NH4)2SO4
a)
Synthesis (or combination)
b)
Decomposition
c)
Single displacement
d)
Double displacement
3.
CaCO3 ----> CaO + CO2
a)
Synthesis (or combination)
b)
Decomposition
c)
Single displacement
d)
Double displacement
4.
Pb + FeSO4 ----> PbSO4 + Fe
a)
Synthesis (or combination)
b)
Decomposition
c)
Single displacement
d)
Double displacement
5.
Na3PO4 + 3 KOH ----> 3 NaOH + K3PO4
a)
Synthesis (or combination)
b)
Decomposition
c)
Single displacement
d)
Double displacement
6.

What type of reaction is the following:
C11H24+17O2−> 11CO2 + 12H2OC_{11}H_{24}+17O_2->\ 11CO_2\ +\ 12H_2O  

a)

Combination

b)

Decomposition

c)

Single Replacement

d)

Double Replacement

e)

Combustion

7.

Is the following equation balanced?

Al + O2 ---> 2Al2O3

a)

YES

b)

NO

8.

Which of the following is a reactant in the following equation?


O2 + C6H12O6 > CO2 + H2O

a)

CO2

b)

H2O

c)

O2

9.

How do we know a chemical reaction has taken place?

a)

Substances change in appearance

b)

Substances change in size

c)

Substances change in states, like from a liquid into a solid.

d)

New substances are formed

10.

Which of the following is a product in the following equation?


O2 + C6H12O6 > CO2 + H2O

a)

CO2

b)

C6H12O6

c)

O2

11.

In which of the following has a chemical reaction taken place?

a)

An apple turning brown

b)

Milk developing a sour taste

c)

Smoke being released as a candle burns

d)

All of the previous

12.

Which of the following is an example of a PHYSICAL change?

a)

Neutralizing vinegar with baking soda

b)

Breaking your iPad with a rock due to school stress

c)

Creating a precipitate by mixing Lead Nitrate and Sodium Iodide

d)

Burning popcorn in the microwave

13.

Which of the following is an example of a CHEMICAL change?

a)

Shattering a window with a baseball

b)

Ripping paper into 1,000,000,000 tiny pieces

c)

Rusting an iron bar on a humid day

d)

Melting a block of copper metal

14.

Which of the following describes the basic structure of single replacement reactions?

a)

A + B --> C

b)

A + B --> AB

c)

A + BC --> AC + B

d)

AB + CD --> AD + CB

15.

What are the products of ALL combustion reactions?

a)

Carbon Dioxide and Water

b)

Smoke and Ash

c)

Fire and Carbon Dioxide

d)

Water and Ash

16.

What type of reaction is this?


2NaHCO3 --> Na2CO3 + H2O + CO2

a)

Single Replacement

b)

Combustion

c)

Decomposition

d)

Synthesis

17.

What type of reaction is this?


2Na + 2H2O --> 2NaOH + H2

a)

Single Replacement

b)

Double Replacement

c)

Synthesis

d)

Decomposition

18.

What does the symbol (aq) stand for?

a)

Aquatic

b)

Aqueous

c)

Aqua

d)

Aquarium

19.

Which coefficient should be placed in front of O2 to balance this equation?


C2H6 + O2 --> H2O + CO2

a)

3.5

b)

7

c)

9

d)

14

20.

Which law states that Matter cannot be created or destroyed?

a)

Law of Conservation of Matter

b)

Law of Gravity

c)

Law of Equivalent Exchange

d)

Law of Matter ad Infinitum

21.
Balance this reaction: ____ Na3PO4 + ____ KOH ---> ____ NaOH + ____ K3PO4
a)
1,3,3,1
b)
1,3,2,1
c)
2,3,3,1
d)
1,1,3,1
22.
Balance this reaction: ____ NaF + ____ Br2 ---> ____ NaBr + ____ F2
a)
3,1,2,1
b)
1,2,3,4
c)
2,1,2,1
d)
1,2,1,2
23.
Balance this reaction: ____ GaF3 + ____ Cs ---> ____ CsF + ____ Ga
a)
1,1,3,1
b)
1,2,3,1
c)
2,3,3,1
d)
1,3,3,1
24.
Balance this reaction: ____ C5H14 + ____ O2 ----> ____ CO2 + ____ H2O
a)
1,8,5,7
b)
2,12,5,14
c)
3,27,15,24
d)
2,17,10,14
25.
What is the molar mass of CH4
a)
16.05
b)
16.04
c)
16.03
d)
16.02
26.
How many grams are in one mole of Oxygen
a)
16
b)
32
c)
15.99
d)
31.98
27.
How many grams are in 3.3 mol of Potassium Sulfide?
a)
360 g
b)
454 g
c)
238 g
d)
132 g
28.
What is the little number after an element in a chemical equation called.
Example: H2
a)
Coefficient 
b)
Subscript
c)
Atom
d)
Equation
29.
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

30.
2H2   +   O2  →  2H2O
How many moles of water can be produced if 8 moles H2 are used?
a)
4 moles
b)
8 moles
c)
16 moles
d)
2 moles
31.
Using the following equation:
4NH3(g) + 5O2(g) --> 4NO(g) + 6H2O(l)
How many grams of oxygen gas are needed to react with 56.8 grams of ammonia?
a)
45.08 g O2
b)
133.33 g O2
c)
260.77 g O2
d)
75.92 g O2
32.
2Na + 2H2O → 2NaOH+ H2
How many grams of hydrogen are produced if 120 g of Na are available?
a)
5.2 g
b)
2.6 g
c)
690 g
d)
45 g
33.
Cl2 + 2 KBr → Br2 + 2 KCl
How many grams of potassium chloride can be produced from 356 g of chlorine and 356 g of potassium bromide?
a)
749 g
b)
223 g
c)
479 g
d)
814 g
34.
How many atoms of iodine are in a mole of iodine?
a)
53
b)
63.55g
c)
126.9
d)
6.02 x 1023
35.
What is the molar mass of NaCl?
a)
58.45g/mol
b)
28g/mol
c)
12g/mol
d)
6.02 x 1023
36.
What is the mass of 0.75 moles of (NH4)3PO4?
a)

101.75 g

b)

121.75 g

c)

111.75 g

d)

131.75 g

37.
How many molecules are there in 5.9 moles of NaCl?
a)
3.5x1024molecules
b)
9.79x10-24molecules
c)
1.02x1023molecules
38.
Which would have more atoms?
a)

1 mole of Li

b)

1 mole of Au

c)

1 mole of Si

d)

None, all are equal

39.

Convert 62 miles/hour to feet/second

a)

5,456 feet/second

b)

0.003 feet/second

c)

90.9 feet/second

d)

909 feet/second

40.

Convert 9,500 feet/year to inches/day

a)

2.2 inches/day

b)

312.3 inches/day

c)

3,123.4 inches/day

d)

31.23 inches/day

41.

Convert 40 ounces to pounds. (16oz = 1lb)

a)

2.5 pounds

b)

0.4 pounds

c)

2/5 pounds

d)

5 pounds

42.

How many kilograms of calcium are there in 173 pounds of calcium?

(1 pound = 454 grams; 1 kg = 1000 g)

a)

1.10 kg

b)

78.5 kg

c)

110 kg

d)

78500 kg

43.
What is it called when you go from this form to this next form?
0.0088 to 8.8 x 103
a)
Standard form to scientific notation
b)
Scientific notation to regular form
c)
Scientific notation to standard form
d)
Standard form to regular form
44.
How would you write 4.3756 x 104 in standard form?
a)
437,560,000
b)
0.00043756
c)
43,756
d)
4,3756
45.
Which number is correctly written in scientific notation?
a)
5.67 x 105
b)
56.7 x 103
c)
0.567 x 106
46.
How do you write
8.317 x 106
in standard form?
a)
8, 371, 000
b)
83, 170, 000
c)
837, 100
d)
8, 317, 000
47.

What is the name of the compound SO2

a)

Monosulfate oxide

b)

Sulfur Dioxide

c)

Monosulfur dioxide

48.
N2 +  3H2 → 2NH3 
How many moles of hydrogen are needed to react with 2 moles of nitrogen?
a)
6
b)
2
c)
3
d)
1
49.
For the Balanced Reaction: 3 Mg + 1 Fe2O3 → 3 MgO + 2 Fe; What is the Ratio of moles of MgO to moles Fe?
a)
3mol Mg / 2 mol Fe
b)
2 mol Mg/ 3 mol Fe
c)
1 mol Fe/ 2 mol Fe
d)
3 mol MgO / 2 mol Fe
50.
N2 +  3H2 → 2NH3 
How many moles of hydrogen are needed to react with 2 moles of nitrogen?
a)
6
b)
2
c)
3
d)
1
51.
2H2   +   O2  →  2H2O
How many moles of water can be produced if 8 moles H2 are used?
a)
4 moles
b)
8 moles
c)
16 moles
d)
2 moles
52.
For the Balanced Reaction: 3 Mg + 1 Fe2O3 → 3 MgO + 2 Fe; What is the Ratio of moles of MgO to moles Fe?
a)
3mol Mg / 2 mol Fe
b)
2 mol Mg/ 3 mol Fe
c)
1 mol Fe/ 2 mol Fe
d)
3 mol MgO / 2 mol Fe
53.
Cl2 + 2KBr → Br2 + 2KCl
How many grams of potassium chloride (KCl) can be produced from 356 g of potassium bromide (KBr)?
a)
749 g
b)
223 g
c)
479 g
d)
814 g
54.
CH4 + 2 O2 → CO2 + 2 H2O
How many moles of carbon dioxide are produced from the combustion of 110 g of CH4?
a)
13.7 mol
b)
2.75 mol
c)
6.11 mol
d)
6.85 mol
55.
B2H6 + 3O2 -->2 HBO2 + 2 H2O
 What mass of O2 will be needed to burn 36.1 g of B2H6?
a)
13.8 g O2
b)
3.86 mol of O2
c)
125.2 g O2
56.
Balance the following reaction :
 
CaC₂(s)   +   H₂O(l)   -->   C₂H₂(g)   +   Ca(OH)₂(aq)
a)
1,2,2,2
b)
1,2,1,1
c)
2,1,1,1
d)
2,1,2,1
57.
Using the following equation:
Fe2O3(s) + 3H2(g) → 2Fe(s) + 3H2O(l)
How many moles of iron can be made from 3 moles of Fe2O3?
a)
6 moles Fe
b)
4 moles Fe
c)
2 moles Fe
d)
1 moles Fe
58.

4 Al + 3 O2 –> 2 Al2O3 How much aluminum would be needed to completely react with 45 grams of O2?

a)

1.05 moles

b)

3.75 moles

c)

0.875 grams

d)

1.875 moles

59.
2Al + 3H2SO4 -> Al2(SO4)3 + 3H2
How many grams of aluminum sulfate would be formed if 250g H2SO4 completely reacted with aluminum?
a)
0.85 g
b)
290 g
c)
450 g
d)
870 g
60.

3 Mg + 1 Fe2O3 → 3 MgO + 2 Fe

Identify the mole ratios for the following pairs:

​ ​ ​ (a)   Mg : ​ (b)   Fe

​ (c)   Fe2O3 : ​ (d)   Fe

​ 1 Fe2O3 : ​ (e)   MgO

Choose from the below words
3
2
1
61.

What is the percent composition of oxygen in MgO?

a)

20%

b)

40%

c)

50%

d)

60%

62.

What is the percent composition of sodium in NaCl?

a)

39%

b)

61%

c)

35%

d)

65%

63.
2Na + 2H2O → 2NaOH+ H2
How many grams of hydrogen are produced if 120 g of Na are available?
a)
5.2 g
b)
2.6 g
c)
690 g
d)
45 g
64.
CH4  +  2O2  →  CO2  +  2H2O
24 grams of CH4 was added to the above reaction. Calculate the theoretical yield of CO2.
a)
66 grams
b)
132 grams
c)
33 grams
d)
8.72
65.

2Fe2O3 + C → Fe + 3CO2

You add 28 grams of carbon. You find the actual yield to be 181.2 grams of CO2. What is the percent yield of CO2?

a)

58.83%

b)

308%

c)

6435%

d)

15.5

66.
A reactant that remains after a chemical reaction stops
a)
stoichiometry
b)
mole ratio
c)
excess reactant
d)
limiting reactant
67.
What is a limiting reactant?
a)
the reactant that determines how much product can be made
b)
the reactant that is in excess
c)
the product that you can make the most of
d)
the amount of reactants that react with each other
68.
Mg + 2HCI → MgCI2 + H2. If 0.02 mol Mg and 0.03 mol HCI added, which is in excess?
a)
Mg
b)
HCI
c)
H2
d)
MgCI2
69.

2Al + 3H2SO4 --> Al2(SO4)3+ 3H2

If 50.0 g of aluminum and 50.0 g of sulfuric acid are reacted, how much excess reactant is left over?

a)

40.8 g

b)

58.1 g

c)

9.16 g

d)

48.9 g

70.
How many oxygen molecules are in 3.36 L of oxygen gas at STP?
a)
0.150 mol O2
b)
2.02 x 1024 molecules O2
c)
2 molecules O2
d)
9.03 x 1022 molecules O2

Similar Resources on Wayground

Ultimate Frisbee

10 questions

Ultimate Frisbee

quiz

Worksheet

•

9th - 12th Grade

YEAR 5 ICT BRAIN TEASER

10 questions

YEAR 5 ICT BRAIN TEASER

quiz

Worksheet

•

5th Grade

Chapter 9 Pre-Quiz

10 questions

Chapter 9 Pre-Quiz

quiz

Worksheet

•

Professional Development

Chinh phục Hóa 8

10 questions

Chinh phục Hóa 8

quiz

Worksheet

•

8th Grade

PEMBENTUKAN MALAYSIA

10 questions

PEMBENTUKAN MALAYSIA

quiz

Worksheet

•

Professional Development

PENGEMBANGAN DIRI 3 PEDAGOGIK 3

10 questions

PENGEMBANGAN DIRI 3 PEDAGOGIK 3

quiz

Worksheet

•

2nd Grade

English Week 2

10 questions

English Week 2

quiz

Worksheet

•

2nd Grade

4TH-SOCIAL STUDIES

10 questions

4TH-SOCIAL STUDIES

quiz

Worksheet

•

4th Grade