WorksheetsMole Practice
Total questions: 9
Worksheet time: 54mins
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.
A mole of carbon dioxide contains 6.02 x 1023 _____.
a)
atoms
b)
formula units
c)
ions
d)
molecules
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.
Determine the number of
atoms in
2.50 moles of zinc.
atoms in
2.50 moles of zinc.
a)
1.51 x 1024 atoms
b)
4.15 x 10-24 atoms
c)
2.71 x 10-22 atoms
d)
163 atoms
5.
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
6.
How many grams of silicon (atomic mass = 28.1 amu) would there be in a sample that contained 9.99 x 1052 atoms? (atoms to grams)
a)
1.69 x 1028
b)
4.66 x 1030
c)
1.66 x 1073
d)
1.69 x 1078
7.
How many grams of NaCl (molar mass = 58.45g) are present in 11.00 moles? (moles to grams)
a)
0.4500 g
b)
156.6 g
c)
331.0 g
d)
642.9 g
8.
What are the units for molar mass?
a)
grams
b)
amu
c)
grams/mole
d)
liters
9.
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
100 %
