wayground logo

Free Printable Worksheets

Font size

S
M
L
XL
Worksheets

C3 EoUA

Total questions: 25

Worksheet time: 3570secs

Name
Class
Date
1.

In chemistry, a "mole" is:

a)

the mass of an atom

b)

a large number used to count particles

c)

based on the volume of a substance

2.

Which has more particles?

a)

1 mole H2O

b)

1 mole Al(OH)3

c)

1 mole NaCl

d)

They are all the same

3.

How many atoms of iodine are there in a mole of iodine?

a)

53

b)

63.55g

c)

126.9

d)

6.02 x 1023

4.
The Law of Conservation of Mass states
a)
that matter exists in all states and reacts the same
b)
that matter can only be changed into new substances by introducing a catalyst
c)
that matter exists in the same state throughout any chemical change
d)
that matter cannot be created or destroyed and that the mass of the products must equal the mass of the reactants
5.

What is the Ar of Li?

a)

3

b)

4

c)

7

6.

What is the Mr of H2O?

a)

16

b)

17

c)

18

d)

20

7.

What would be the mass of 1.5mol H2O

a)

20g

b)

27g

c)

32g

d)

40g

8.

What is the Mr of Ca(OH)2

a)

18

b)

26

c)

57

d)

74

9.

What is the Mr of CO2

a)

28

b)

44

c)

56

d)

66

10.
What is the molar mass of C2H4O2?
a)
40g
b)
50g
c)
60g
d)
68g
11.

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 grams

12.
The ______________ yield is the maximum amount of product possible in a reaction. This determines the amount of product that should be produced in a perfect setting
a)
Percent
b)
actual
c)
stoichiometry
d)
theoretical
13.

When reacting Na with Cl2, we calculated that the theoretical yield should be 13.0 grams. Our actual yield was 12.5 grams. What is the percent yield?

a)

100%

b)

104%

c)

96%

d)

1.04

14.

What does percent yield indicate?

a)

The amount of product we should get

b)

The efficiency of the reaction

c)

The amount of product we actually got

d)

nothing

15.
Theoretical yield = 73g
Actual yield = 62g
Calculate the percent yield.
a)
1.16%
b)
116%
c)
85%
d)
76%
16.
Percent yield = 100%
Theoretical yield = 88 grams
What is your actual yield?
a)
88 grams
b)
88%
c)
100 grams
d)
22%
17.
How many Al atoms are in this compound?         4Al2O3
a)
2
b)
8
c)
6
d)
4
18.

Why are chemical equations always balanced? Select ALL that apply.

a)

Matter cannot be created.

b)

Matter cannot be destroyed.

c)

Matter can only be rearranged/conserved.

d)

Matter doesn't matter.

19.

How many moles are there in 72g of Mg

a)

6.02 x 1023

b)

1

c)

2

d)

3

20.

Find the mean and range of these numbers:

2, 2, 3, 4, 4, 24

a)

mean = 3 range = 22

b)

mean = 3 range = 2

c)

mean = 6.5 and range = 2

d)

mean = 6.5 and range = 22

21.

What is the Mr of CH4

a)

5

b)

13

c)

16

d)

52

22.

43 g of NaCl is dissolved in 500 cm3 of water. What is the concentration?

a)

86 g/dm3

b)

0.86 g/cm3

c)

86 g/cm3

d)

8.6 g/dm3

23.

What is the electron structure of sodium?

a)

1, 2, 8

b)

2, 8, 1

c)

8, 8, 1

d)

1, 8, 2

24.

What are the units of concentration?

a)

g/ cm2

b)

g/dm3

c)

g/dm2

d)

kg/dm2

25.

Mg is burnt in an excess of air to produce MgO. Name the limiting reactant.

a)

Oxygen

b)

Magnesium

c)

Magnesium Oxide

d)

There isn't one

Similar Resources on Wayground

Safety & Lab Review Quiz

21 questions

Safety & Lab Review Quiz

quiz

Worksheet

•

9th Grade

Periodic Table Quiz

20 questions

Periodic Table Quiz

quiz

Worksheet

•

8th - 10th Grade

Chemistry Ch#4&5

20 questions

Chemistry Ch#4&5

quiz

Worksheet

•

9th Grade

REVISION CHEM P2,P4,P6

20 questions

REVISION CHEM P2,P4,P6

quiz

Worksheet

•

9th - 10th Grade

BM3 REVIEW

20 questions

BM3 REVIEW

quiz

Worksheet

•

9th - 12th Grade

Mixed Stiochiometry

20 questions

Mixed Stiochiometry

quiz

Worksheet

•

9th - 12th Grade

7.1 Air

20 questions

7.1 Air

quiz

Worksheet

•

7th - 9th Grade