Free Printable Moles Unit Test Review

1.

The mole is.....

a)

A type of element

b)

A type of animal

c)

A specific number

d)

A random number

2.

How would you find the molar mass of an element?

a)

Add the atomic numbers of elements

b)

Find the atomic number of the element

c)

Find the average atomic mass of the element

d)

Add the atomic masses of the elements

3.

How would you find the molar mass of an compound?

a)

Add the atomic numbers of elements

b)

Find the atomic number of the element

c)

Find the average atomic mass of the element

d)

Add the atomic masses of the elements

4.

What is the molar mass of Copper (Cu)?

a)

$6.02\ X\ 10^{23}$

b)

63.5

c)

127

d)

Impossible to tell

5.

What is the molar mass of $K_2S$ ?

a)

71

b)

110

c)

103

d)

Impossible to tell

6.

What is the molar mass of $K_2SO_4$ ?

a)

174

b)

110

c)

87

d)

270

7.

What is the molar mass of $Ca\left(ClO_4\right)_2$ ?

a)

139.5

b)

91.5

c)

203.5

d)

239

8.

What is the first step to calculating percent composition of a compound?

a)

Find the Molar Mass of the Compound

b)

Find the atomic number of the first element

c)

Divide each component element by the total

d)

Find the number of atoms in the compound

9.

What must you do once you find the molar mass of a compound when calculating the percent composition?

a)

Find the number of atoms in the compound

b)

Divide the mass of each component element by the total

c)

Find the atomic numbers of each element

d)

Find the molarity of the solution

10.

What should the total percentage be after you add all of the component percentages together?

a)

10%

b)

1000%

c)

100%

d)

Impossible to know

11.

What is the percent composition of Hydrogen in $H_2O$

a)

11%

b)

89%

c)

6%

d)

94%

12.

What is the percent composition of Oxygen in $H_2O$

a)

11%

b)

89%

c)

6%

d)

94%

13.

What is the percentage of Lead (Pb) in $PbCr_2O_7$

a)

24.5%

b)

75.3%

c)

26.5%

d)

49%

14.

What is the percentage of Chromium (Cr) in $PbCr_2O_7$

a)

24.5%

b)

75.3%

c)

26.5%

d)

49%

15.

What is the percentage of Oxygen in $PbCr_2O_7$

a)

24.5%

b)

75.3%

c)

26.5%

d)

49%

16.

What is the percent composition of Iron (Fe) in $Fe_2\left(SO_4\right)_3$ ?

a)

48%

b)

28%

c)

54%

d)

37%

e)

24%

17.

What is the percent composition of Sulfur in $Fe_2\left(SO_4\right)_3$ ?

a)

48%

b)

28%

c)

21%

d)

31%

e)

24%

18.

What is the percent composition of Oxygen in $Fe_2\left(SO_4\right)_3$ ?

a)

48%

b)

28%

c)

21%

d)

31%

e)

24%

19.

In order to convert between units, there must be a .

(a)

20.

The conversion factor for converting between moles and particles is .

(a)

21.

The conversion factor for converting between moles and grams is .

(a)

22.

How many atoms are in 14 moles of cadmium?

a)

$8.43\ X\ 10^{24}$

b)

14

c)

$6.02\ X\ 10^{23}$

d)

112.4

e)

1573.6

23.

How many moles are in 4.3 x 10²² molecules of H₃PO₄?

a)

417

b)

6.02 x 10²³

c)

.71

d)

25.9

24.

How many moles are in 40.0 grams of water (H₂O)

a)

2.41 X 10²⁵

b)

6.02 X 10²³

c)

720

d)

2.2

25.

There are grams are in 3.7 moles of Na₂O?

(a)

26.

How many molecules are in 48.0 grams of NaOH?

a)

1.2

b)

7.2 x 10²³

c)

40

d)

6.02 X 10²³

27.

How many grams are in 4.63 x 10²⁴ molecules of CCl₄?

a)

2.8 x 10²⁴

b)

6.02 X 10²³

c)

1184

d)

7.7

28.

Convert 182g of PbNO₃ to molecules.

Moles Unit Test Review

Total questions: 28

Worksheet time: 47mins

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