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WorksheetsMole Practice
Total questions: 18
Worksheet time: 2hrs 30mins
Name
Class
Date
1.
What is the molar mass of AuCl3?
a)
96 g
b)
130 g
c)
232.5 g
d)
303.3 g
2.
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
3.
How many molecules are there in 31.8 moles of water?
a)
5.28 x 10-23 molecules
b)
1.91 x 1025 molecules
c)
5.28x 10-25
d)
1.91 x 1022
4.
How many moles of sulfur atoms are there in 5.0 g of sulfur?
a)
160 mol
b)
8.3 x 10-24 mol
c)
0.16 mol
d)
2.7 x 10-22 mol
5.
Find the Molar Mass of:
Ga2(SO3)3
Ga2(SO3)3
a)
280 g/mol
b)
400 g/mol
c)
380 g/mol
d)
480 g/mol
6.
What is the mass of 1.2 moles of IrI3?
a)
570 g
b)
690 g
c)
320 g
d)
957 g
7.
How many grams are in 3.3 mol of Potassium sulfide (K2S)?
a)
360 g
b)
454 g
c)
238 g
d)
132 g
8.
Calculate the number of moles in 20.9 grams of N2
a)
1.49 moles
b)
0.746 moles
c)
0.37 moles
d)
1.74 moles
9.
How many grams of silicon would there be in a sample that contained 9.99 x 1022 atoms?
a)
1.69 g
b)
4.66 g
c)
1.66 g
d)
1.79 g
10.
What are the units for molar mass?
a)
grams
b)
amu
c)
grams per mole
d)
liters
11.
You have 8.65 x 1025 atoms of arsenic. How many grams do you have?
a)
144 g As
b)
10,765 g As
c)
107 g As
d)
None of these
12.
How many molecules are in 3.6 grams of NaCl?
a)
0.06
b)
1.0x1021
c)
1.3x1026
d)
3.7x1022
13.
Calculate the number of atoms in 4.00 x 10-5 g of sodium.
a)
1.05 x 1018 atoms
b)
3.92 x 1019 atoms
c)
3.24 x 1023 atoms
d)
5.54 x 1020 atoms
14.
What is the mass of 1.0 x 1012 molecules of O2?
a)
1.9 x 1013 g
b)
6.0 x 1011 g
c)
5.3 x 10-11 g
d)
1.7 x 10-12 g
15.
How many moles of Cu(ClO3)2 contain 1.45x121 formula units?
a)
8.73x1044
b)
1.20x1024
c)
0.00241
d)
1.45
16.
How many grams are in 1.2 x 1024 atoms of C?
a)
28 grams
b)
24 grams
c)
6.02 grams
d)
1.2 grams
17.
How many grams are inn 9.4 x 1025 molecules of H2
a)
1.98 g
b)
200g
c)
315g
d)
452g
18.
How many grams are in 3.01 x 1022 atoms of magnesium?
a)
1.22 grams
b)
1.215 grams
c)
1.2 grams
d)
1.22x1046 grams
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