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Mole Conversions
Test Description: Simple mole conversions
Instructions: Answer all questions to get your test result.
1) What is the molar mass of aa compound if 5 moles has a mass of 100 g?
A
500 g
B
20 g/mol
C
0.05 mol/g
D
5 g/mol
2) A 39 g portion of LiF contains how many moles?
A
1.0 mol
B
0.5 mol
C
2.0 mol
D
1.5 mol
3) What is the mass of 3.0E23 atoms of helium?
A
8.00 g
B
2.00 g
C
3.50 g
D
4.00 g
4) What is the molar mass of calcium nitrate?
A
70.0 g/mol
B
102 g/mol
C
164 g/mol
D
150 g/mol
5) A sample containing 1.5E23 nitrogen molecules contains the same number of molecules as
A
1.0 mol hydrogen
B
2.0 mol helium
C
0.5 mol Ne
D
0.25 mol oxygen
6) How many moles of oxygen atoms are contained in 44 g of cabon dioxide?
A
1.6 mol
B
1.0 mol
C
2.0 mol
D
4.4 mol
7) Which has the largest molar mass?
A
Titanium
B
Lithium chloride
C
Carbon dioxide
D
Water
8) The molar mass of H₂O₂ is
A
The same as the molar mass of water
B
Twice the molar mass of water
C
16 g greater than the molar mass of water
D
8 grams greater than the molar mass of water
9) Which has the largest molar mass?
A
Magnesium sulfate
B
Lithium sulfate
C
Calcium sulfate
D
Sodium sulfate
10) Bromine is a diatomic element. The molar mass of elemental bromine is
A
120 g/mol
B
160 g/mol
C
79.9 g/mol
D
40.0 g/mol
11) How many helium atoms are in 6.44 E-24 g of helium?
A
1000 atoms
B
2 atoms
C
1 atom
D
4 atoms
12) How many moles of oxygen are in 17 moles of Ba₃(PO₄)₂?
A
102 mol
B
34 mol
C
17 mol
D
136 mol
13) How many moles of Fe2O3 are in 79.85 g Fe₂O₃?
A
0.1000 mol
B
0.2500 mol
C
0.5000 mol
D
1.000mol
14) How many total atoms are in 1.0 mol of Ca₃N₂?
A
1.2 E24
B
3.0 E24
C
1.8 E24
D
6.0 E23
15) What mass of chlorine contains the same number of atoms as 63 g of sodium?
A
63 g
B
126 g
C
80 g
D
96 g
16) What is the mass of 3.0 E23 molecules of CO₂?
A
44 g
B
22 g
C
66 g
D
88 g
17) What is the molar mass of (NH₄)₃PO₄
A
113 g/mol
B
149 g/mol
C
121 g/mol
D
404 g/mol
18) Which has the largest molar mass? NO, NO₂, N₂O, or N₂O₄?
A
N₂O₄
B
NO₂
C
N₂O
D
NO
19) Avogadro's number represents the number of atoms in
A
320 g Sulfur
B
18 g Water
C
12.7 g Iodine
D
12 g Carbon
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