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WorksheetsMole Convesions Quiz
Total questions: 11
Worksheet time: 25mins
Name
Class
Date
1.
How many molecules are in 2.5 mol of NaCl?
a)
1.51x1023
b)
146
c)
4.15
d)
1.51x1024
2.
How many atoms of carbon are in 6.00g of carbon?
a)
1.20x1024atoms C
b)
6.02x1023atoms C
c)
3.01x1023atoms C
d)
1.50x1023atoms C
3.
How many grams are in 1.2 x 1024 molecules of CO?
a)
28 grams
b)
56 grams
c)
6.02 grams
d)
1.2 grams
4.
What is the molar mass of table salt (NaCl)?
a)
116.886 g/mol
b)
35.453 g/mol
c)
22.990 g/mol
d)
58.443 g/mol
5.
How many moles of copper are 4.57 x 1013 atoms of copper?
a)
7.59 x 10-11 moles
b)
2.75 x 1037 moles
c)
7.59 x 1011 moles
d)
2.75 x 1033 moles
6.
How many molecules of water are in a 821.3 g sample?
a)
45.58 molecules
b)
8.232 x 1025 molecules
c)
8.909 x 1027 molecules
d)
2.744 x 1025 molecules
7.
Which conversion factor should be used to solve the following, "How many moles of argon atoms are present in 11.2 L of argon gas at STP?"
a)
1 mol = 22.4 L
b)
1 mol = 39.95 g
c)
1 mol = 6.02x1023 atoms
d)
More than 1
8.
How many molecules are in 9.44 moles of AlCl3?
a)
5.68 molec AlCl3
b)
5.68x1024 molec AlCl3
c)
0.705 molec AlCl3
d)
1.25x1023 molec AlCl3
9.
What are the units for molar mass?
a)
grams
b)
amu
c)
grams/mole
d)
liters
10.
What is the mass in grams of 5.90 mol C8H18?
a)
.0512 g
b)
19.4 g
c)
674 g
d)
389 g
11.
How many grams are in 4.50 L of sulfur trioxide gas at STP?
a)
101 g
b)
16.1 g
c)
5.98 x 10-22 g
d)
1.21 x 1023 g
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