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