Problem Set 3.2:
Basic Mole Conversions
Complete the chart calculating the mass or moles of each substance.
Name or Formula
Mass
sodium bromide
50.0 g
Mole
1.
2.
FeSO3
1.25 mol
3.
4.
magnesium
phosphate
6.4 mol
CaSiO3
1.24 x 10-4 g
5.
sodium chlorite
2.03 kg
6.
Al(CN)3
4.5 mmol
7.
sulphur
4.00 kmol
Name or Formula
8.
Mass
Mole
lead (II) carbonate
945.78 g
9.
10.
dinitrogen
pentaoxide
4.88 x 103 µg
CoS2O3•2H2O
8.0 x 103 g
11.
(NH4)2HPO4
6.48 mol
12.
13.
sodium bicarbonate
decahydrate
2.40 g
C2N5
560.4 mol
14.
glucose
0.000 56 mol
15.
vanadium (IV)
hypochlorite
10.00000 g
Name or Formula
Number of Particles
Moles
16.
sodium bromide
4.56 mol
17.
F2
1.24 x 1022 molecules
18.
FeSO3
0.047 mol
19.
magnesium
phosphate
6.8 x 1026 formula units
CaSiO3
2.724 x 1023 formula units
sodium
8.524 x 1018 atoms
20.
21.
22.
Al(CN)3
9.044 x 10-5 mol
phosphorus
16.000 mol
23.
Complete the chart. You do not have to show work for this chart.
Name
Formula
Molar Mass
Mass of Given
Sample
24.
bromine
40.0 g
25.
carbon
dioxide
17.6 g
26.
helium
27.
28.
30.
32.
15.4 mol
MgS
water
sulphur
trioxide
684.0 g
2.0 g
H2O2
lithium
0.009 mol
360.0 g
CaO
33.
34.
154.0 g
lead
31.
Number of
Particles
4.2 x 1026 atoms
N2
29.
Moles
510.0 g
1.66 x 1024 atoms
Problem Set: Basic Mole Conversions ANS KEY
Complete the chart calculating the mass or moles of each substance. Show
your work using unit analysis.
1.
Name or Formula
Mass
Mole
102.89 g/mol
50.0 g
0.486 mol
1.70 x 102 g
1.25 mol
1.7 x 103 g
6.4 mol
1.24 x 10-4 g
1.07 x 10-6 mol
2.03 kg
22.4 mol
0.47 g
4.5 mmol
1.03 x 106 g
4.00 kmol
945.78 g
3.5396 mol
sodium bromide
2.
135.91 g/mol
FeSO3
3.
262.87 g/mol
magnesium
phosphate
4.
116.17 g/mol
CaSiO3
5.
90.44 g/mol
sodium chlorite
6.
105.04 g/mol
Al(CN)3
7.
256.48 g/mol
sulphur
8.
267.20 g/mol
lead (II) carbonate
9.
108.02 g/mol
dinitrogen
pentaoxide
4.88 x 103 µg
4.52 x 10-5 mol
10.
207.09 g/mol
8.0 x 103 g
39 mol
CoS2O3•2H2O
11.
132.08 g/mol
856 g
6.48 mol
2.40 g
9.08 x 10-3 mol
5.272 x 104 g
560.4 mol
0.10 g
0.000 56 mol
10.00000 g
0.03894991 mol
(NH4)2HPO4
12.
264.21 g/mol
sodium
bicarbonate
decahydrate
13.
94.07 g/mol
C2N5
14.
180.18 g/mol
glucose
15.
256.74 g/mol
vanadium (IV)
hypochlorite
16.
sodium bromide
2.75 x 1024 formula units
4.56 mol
17.
F2
1.24 x 1022 molecules
0.0206 mol
18.
FeSO3
2.8 x 1022 formula units
0.047 mol
19.
magnesium
phosphate
6.8 x 1026 formula units
1.1 x 103 mol
20.
CaSiO3
2.724 x 1023 formula units
0.4525 mol
21.
sodium
8.524 x 1018 atoms
1.416 x 10-5 mol
22.
Al(CN)3
5.444 x 1019 formula units
9.044 x 10-5 mol
23.
phosphorus
9.6320 x 1024 molecules
16.000 mol
Complete the chart. You do not have to show work for this
chart.
Name
Formula
Molar
Mass
Mass of
Given
Sample
Moles
Number of
Particles
24.
bromine
Br2
159.80
g/mol
40.0 g
0.250 mol
1.51 x 1023
molec
25.
carbon
dioxide
CO2
44.01
g/mol
17.6 g
0.400 mol
2.41 x 1023
molec
26.
helium
He
4.00 g/mol
2.8 x 103 g
7.0 x 102 mol
4.2 x 1026
atoms
27.
nitrogen
N2
28.02
g/mol
154.0 g
5.496 mol
3.309 x 1024
molec
28.
lead
Pb
207.19
g/mol
3.19 x 103 g
15.4 mol
9.27 x 1024
atoms
29.
magnesium
sulphide
MgS
56.37
g/mol
0.5 g
0.009 mol
5 x 1021 f.u.
30.
water
H2O
18.02
g/mol
360.0 g
19.98 mol
1.203 x 1025
molec
31.
calcium
oxide
CaO
56.08
g/mol
684.0 g
12.20 mol
7.343 x 1024
f.u.
32.
sulphur
trioxide
SO3
80.06
g/mol
2.0 g
0.025 mol
1.5 x 1022
molec
33.
hydrogen
peroxide
H2O2
34.02
g/mol
510.0 g
14.99 mol
9.024 x 1024
molec
34.
lithium
Li
6.94 g/mol
19.1 g
2.76 mol
1.66 x 1024
atoms