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WorksheetsQuantitative Chemistry
Total questions: 18
Worksheet time: 21mins
Name
Class
Date
1.
What is the relative formula mass of CO2?
a)
44
b)
32
c)
16
d)
56
2.
What is the unit for molar mass?
a)
no unit
b)
g
c)
g mol-1
3.
What is the formula for iron(III) oxide?
a)
FeO
b)
Fe3O
c)
Fe3O2
d)
Fe2O3
4.
Calculate the number of gold atoms in a 4 mole sample of gold.
a)
2.41x1024
b)
3.01x1023
c)
4.82x1024
d)
6.02x1023
5.
Calculate the number of moles of Aluminum in a 2.04 mole sample of aluminum oxide, Al2O3.
a)
2.04 moles
b)
4.08 moles
c)
6.12 moles
d)
1.02 moles
6.
Calculate the mass of oxygen present in a 55g sample of Aluminum oxide, Al2O3.
a)
29.28
b)
19.95
c)
11.36
d)
32.33
7.
Calculate the % composition by mass of oxygen present in H2SO4.
a)
16.3%
b)
65.25%
c)
32.6%
d)
57.14%
8.
What is the empirical formula of a compound if the molecular formula is W18O9?
a)
W18O9
b)
W2O
c)
W6O3
d)
none of the above
9.
Which represents the greatest mass of sulfur?
a)
1 gram of sulfur
b)
1 molecule of sulfur
c)
0.5 mole of sulfur
d)
6.02 x 1023 atoms of sulfur
10.
What is the mass of one mole of aluminum?
a)
27 g
b)
13 g
c)
54 g
d)
14 g
11.
What is the molar mass of CO2?
a)
12
b)
16
c)
32
d)
44
12.
What is the mass percentage of Carbon in carbon dioxide (CO2)?
a)
27.3%
b)
42.9%
c)
57.1%
d)
72.7%
13.
Formula mass of KBr
a)
119
b)
117g
c)
54
d)
62g
14.
Moles of Al2O3 in 40g
a)
40%
b)
0.39
c)
4080
d)
2.55
15.
How much CO2 could you make from 6g of C?
C + O2 --> CO2
C + O2 --> CO2
a)
12g
b)
44g
c)
22g
d)
32g
16.
Mass of one mole of Mg(OH)2
a)
58g
b)
42g
c)
82g
d)
41g
17.
Formula mass of CaCO3
a)
100
b)
100g
c)
50
d)
50g
18.
Formula mass of HF
a)
20g
b)
10g
c)
11
d)
20
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