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WorksheetsMoles
Total questions: 20
Worksheet time: 24mins
Name
Class
Date
1.
How many moles are in 4.5x1024 particles?
a)
0.747 particles
b)
0.747 mol
c)
2.71x1047 mol
d)
2.71x1047 particles
2.
What is the molar mass of Mg3N2?
a)
191.6 g/mol
b)
76.64 g/mol
c)
38.32 g/mol
d)
100.95 g/mol
3.
What is the mass of one mole of Al2(SO4)3?
a)
75.04 g
b)
342.14 g
c)
75.04 mol
d)
342.14 mol
4.
How many moles of carbon atoms are there in 5g of carbon?
a)
60 mol
b)
17 mol
c)
0.42 mol
d)
7 mol
5.
How many molecules are there in 5.9 moles of NaCl?
a)
3.5x1024molecules
b)
9.79x10-24molecules
c)
1.02x1023molecules
6.
How many molecules are present in 69.0 moles of SrO?
a)
4.16x1025molecules
b)
8.72x1021molecules
c)
7,149.78 molecules
d)
6,893.32 molecules
7.
How many moles are there in 12.7g of CaF2?
a)
0.20 mol
b)
1,000.76 mol
c)
6.14 mol
d)
0.16 mol
8.
What is the mass of 9.4 moles of B2(Cr2O7)3?
a)
6.41 x 1022g
b)
5.67x1024 g
c)
49.11 g
d)
4,339.23 g
9.
How many moles of (NH4)2O are present in 74.9 g?
a)
3,907.0 moles
b)
1.44 moles
c)
8.67x1023moles
d)
0.79 moles
10.
How many molecules are present in 25 g of NaBr?
a)
102.96 molecules
b)
0.24 molecules
c)
1.45x1023 molecules
d)
2.34 x 1020molecules
11.
What is the mass of 54.3x1045molecules of BeO?
a)
3.27x1070 g
b)
9.01 x1022g
c)
2.25 x1024 g
d)
1.31 x1069g
12.
Mass of one mole of CO2
a)
44
b)
44g
c)
28
d)
28g
13.
Formula mass of KBr
a)
119
b)
117g
c)
54
d)
62g
14.
Moles of H2PO4 in 20g?
a)
0.206
b)
0.103
c)
0.412
d)
8
15.
Find the mass in grams of 0.75 moles of magnesium (Mg).
a)
32 grams
b)
18 grams
c)
2.21 x 10 ^23 grams
16.
How many atoms would be contained in 454 grams of iron (Fe)?
a)
6.02 x 10^23 atoms
b)
8.14 atoms
c)
4.90 x 10^24 atoms
17.
A mole of Neon contains
6.02 x 1023 _____.
6.02 x 1023 _____.
a)
atoms
b)
formula units
c)
ions
d)
molecules
18.
Avogadro's number of representative particles is equal to one_____.
a)
kilogram
b)
gram
c)
kelvin
d)
mole
20.
What do we call the SI unit for amount of a substance?
a)
Avogadro's number
b)
kilogram
c)
mole
d)
liter
20.
What do we call the SI unit for amount of a substance?
a)
Avogadro's number
b)
kilogram
c)
mole
d)
liter
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