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Chemistry Conversions Mole to Mass Mass to Atoms Moles to Volume

Total questions: 20

Worksheet time: 2hrs 17mins

Name
Class
Date
1.

What is the molar mass of dihydrogen dioxide (H2O2)?

a)

48.0 g/mole

b)

34.0 g/mole

c)

36.5 g/mole

d)

35.5 g/mole

2.

What is the molar mass of (NH4)2CO3 ?

a)

144.0g

b)

138.0 g

c)

96.1 g

d)

78.1 g

3.

How many particles are in 13.5 grams of Beryllium?

a)

1.50 particles

b)

9.03 particles

c)

4.00x1023 particles

d)

9.03x1023 particles

4.

How many moles are in 98.3 g of Aluminum Hydroxide (Al(OH)3)?

a)

78.0 mol

b)

1.30 mol

c)

6.60 mol

d)

5.90 mol

5.

How many grams are in 3.3 mol of Potassium Sulfide (K2S)?

a)

3.6 x 10 2 g

b)

454 g

c)

238 g

d)

3.6399 x 10 2 g

6.
A mole of potassium chloride (KCl) contains 6.02 x 1023 _____.
a)
atoms
b)
formula units
c)
ions
d)
molecules
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.

How many water molecules are in 5.2 moles of water?

a)

6.02 x 1023

b)

5.2

c)

3.1 x 1024

d)

8.6 x 10 -24

9.
What is the difference between a formula unit and a molecule?
a)
formula unit - ionic bond
molecule - covalent bond
b)
formula unit - big
molecule - small
c)
formula unit - covalent bond
molecule - ionic bond
d)
formula unit - small
molecule - big
10.

Avogadro's number of representative particles is equal to one_____.

a)

liter

b)

gram

c)

molecule

d)

mole

11.

How many moles are in 3.01 x 1022 atoms of magnesium?

a)

0.0500 moles

b)

1.81 x 1046 moles

c)

5.00 x 1021 moles

d)

5.00 moles

12.
Which of the following dimensional analysis setups will correctly convert 27.76g of Li to atoms of Li?
a)
A
b)
B
c)
C
d)
D
13.

Which of the following dimensional analysis setups will correctly convert 4.00x1023atoms of cobalt to moles of cobalt? How many moles of colbalt are there?

a)

setup B : 0.6644mol Co

b)

setup A: 2.41x1047mol Co

c)

setup A : 0.664mol Co

d)

setup B: 2.41x1047mol Co

14.

Which of the following is not a representative particle?

a)

Element

b)

Molecule

c)

Formula Unit

d)

Atoms

15.
What volume is occupied by 4 moles of hydrogen molecules (H2) at standard conditions?
a)
2.4 x 1024 molecules ?
b)
89.6 liters
c)
5.6 liters
d)
72 liters
16.
How many moles of O2 are their in 89.6 liters?
a)
2 moles
b)
16 moles
c)
4 moles
d)
1 mole
17.
Which conversion factor should be used to solve the following, "How many moles in 28 grams of CO2?"
a)
1 mol = 22.4 L 
b)
1 mol = 44.01 g
c)
1 mol = 6.02x1023 atoms
d)
more than one
18.
A container with a volume of 893 L contains how many moles of air at STP?
a)
20003.2 L
b)
39.9 L
c)
22.4 L
d)
none of the choices
19.
What are the units for molar mass?
a)
grams
b)
amu
c)
grams/mole
d)
liters
20.
How many grams are in
1.2 x 1024 atoms of C?
a)
23.9 grams
b)
24 grams
c)
6.02 grams
d)
1.2 grams