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Molar conversions #2

Total questions: 15

Worksheet time: 39mins

Name
Class
Date
1.

Which has more molecules?

a)

1 mole H2O

b)

1 mole CH4

c)

1 mole Cl2

d)

They're are all the same.

2.

One mole of sulfur (S) is equal to home many atoms?

a)

32 atoms

b)

16 atoms

c)

1.20 x 1023 atoms

d)

6.02 x 1023 atoms

3.

5.11 x 1023 atoms of lithium (Li) is equal to how many moles?

a)

1.18 moles

b)

0.351 moles

c)

1.34 moles

d)

0.849 moles

4.

Which conversion factor would you use to calculate correctly the mass of 2 moles of the element titanium?

a)

47.86 g Ti / 1 mol Ti

b)

1 mol Ti / 47.84 g Ti

c)

47.84 mol / 1 g Ti

d)

47.87 g Ti / 1 mol Ti

5.

Find the mass in grams of 2.25 x 1024 atoms of calcium.

a)

40.0 grams

b)

255.1 grams

c)

150 grams

d)

9.02 x 1024 grams

6.

What is the molar mass of gold(III)chloride?

a)

96.00 g/mol

b)

130.00 g/mol

c)

232.51 g/mol

d)

303.32 g/mol

7.
If I have 6.02 x1023 molecules of CO2, what is the mass?
a)
44.0 g
b)
2.65 x1023 g
c)
1.37 x1022 g
d)
96.0 g
8.

What is the molar mass of fluorine gas?

a)

19.00 g/mol

b)

38.00 g/mol

c)

9 g/mol

d)

18 g/mol

9.
Molar mass is in units of ________.
a)
grams
b)
grams/mole
c)
mole
d)
moles/gram
10.

Which compound has the smallest molar mass?

a)

CO

b)

CO2

c)

H2O

d)

H2O2

11.

Which conversion factor should be used to solve the following, "Find the mass in grams of 2.00 x 1023 molecules of F2."

a)

1-Step Mole Conversion

b)

2-Step Mole Conversion

12.
How many moles are 2.85 x 1018 atoms of iron?
a)
4.73 x 10-6 moles
b)
1.72 x 1042 moles
c)
1.72 x 10-42 moles
d)
4.73 x 106 moles
13.

What is the volume of 160 g of oxygen gas at STP?

a)

112 L

b)

22.4 L

c)

78.8 L

d)

114.24 L

e)

224 L

14.
How many molecules are in 32.4 grams of phosphorous pentoxide?
a)
1.76 x 1023 molecules
b)
0.29 moles
c)
1.76 x 1022 molecules
d)
0.29 molecules
15.
How many atoms would be contained in 454 grams of iron (Fe)?
a)
6.02x1023 atoms
b)
8.14 atoms
c)
4.90x1024 atoms
d)
55.85x1023 atoms