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WorksheetsMole and Molar Mass
Total questions: 28
Worksheet time: 2hrs 37mins
Name
Class
Date
1.
What is the definition of molar mass?
a)
number of grams per one mole of a substance
b)
whole number ratio that is a multiple of a chemical formula
c)
simplest, whole number ratio of a chemical formula
d)
6.02 x 10^23 particles per one mole of a substance
2.
Molar mass is in units of ________.
a)
grams
b)
grams/mole
c)
mole
d)
moles/gram
3.
What is the molar mass of AuCl3?
a)
96 g
b)
130 g
c)
232.5 g
d)
303.3 g
4.
What is the definition for Avogadro's number?
a)
number of grams per one mole of a substance
b)
whole number ratio that is a multiple of a chemical formula
c)
simplest, whole number ratio of a chemical formula
d)
6.02 x 10^23 particles per one mole of a substance
5.
Which would have more atoms?
a)
1 mole of Li
b)
1 mole of Au
c)
1 mole of Si
d)
None, all are equal
6.
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
7.
How many moles are present in 32.3 grams of carbon dioxide (CO2)?
a)
44.01 moles
b)
1421.52 moles
c)
32.3 moles
d)
0.73 moles
8.
What is the mass in grams of 5.90 mol C8H18?
a)
.0512 g
b)
19.4 g
c)
673 g
d)
389 g
9.
What is the mass of 2.50 mol of oxygen gas O2?
a)
40 g
b)
80 g
c)
16 g
d)
32 g
10.
How many water molecules are in 5.2 moles of water?
a)
6.02 x 1023
b)
5.2
c)
3.1304 x 1024
d)
8.638 x 10-24
11.
What is the molar mass of AuCl3?
a)
96 g
b)
130 g
c)
232.5 g
d)
303.3 g
12.
How many grams are in 11.9 moles of chromium?
a)
50 g
b)
619 g
c)
0.23 g
d)
4.4 g
13.
1 mole of Ca and 1 mole of Na have the same number of atoms.
a)
True
b)
False
14.
1 mole is equivalent to 6.02 x 1023
a)
False
b)
True
15.
Which conversion factor should be used for the following question " How many molecules are there in 4.00 moles of glucose, C6H12O6?
a)
1 mole = 78.12 g
b)
1 mole = 22.4 L
c)
1 mol = 6.02x 1023 particles
d)
more than one
16.
What is the molar mass of Hydrogen Peroxide (H2O2)?
a)
48 g/mole
b)
34.02 g/mole
c)
36.5 g/mole
d)
35.5 g/mole
17.
The number 6.02 x 1023, which is the number of particles found in a mole.
a)
molar mass
b)
mole
c)
Avogadro's number
d)
hydrate
18.
How many atoms of iodine are in 1 mole of iodine?
a)
53
b)
63.55
c)
126.9
d)
6.02 x 1023
19.
How many particles would be in 8.4 moles of Octane (C8H18)?
a)
5.77 x 1023
b)
5.04 x 1024
c)
5.77 x 1026
d)
5.04 x 1023
20.
Which has more molecules?
a)
1 mole H2O
b)
1 mole Al(OH)3
c)
1 mole NaCl
d)
They all contain the same number of molecules
21.
What is the mole used for?
a)
To measure the amount of grams in a substance
b)
To measure the amount of atoms or molecules in a substance
c)
To measure the amount of energy in a substance
d)
To measure the amount of bonding in a substance
22.
How many molecules are there in 5.5 moles potassium chloride?
a)
4.08 x 10-24
b)
3.31 x 1024
c)
33.11
d)
0.98
23.
How many moles are in 4.50 x 1023 atoms of aspirin?
a)
9.03 x 1046 moles
b)
0.757 moles
c)
4.73 moles
d)
0.0131 moles
24.
Convert 1.5 moles of naproxen to molecules
a)
25.01 molecules
b)
9.0 x 1023 molecules
c)
0.12 molecules
d)
1.80 x 1024 molecules
25.
How many atoms of each element are in a molecule of Mg(NO3)2?
a)
Mg: 1
NO : 2
b)
Mg: 1
N: 2
O: 5
c)
Mg: 2
N: 2
O: 6
d)
Mg: 1
N: 2
O: 6
26.
Which list of number of atoms in K3PO3 is right?
a)
K: 3
PO: 3
b)
K: 3
P: 1
O: 3
c)
K : 3
P: 4
O: 1
d)
K: 3
P: 5
O: 4
27.
How many molecules are in 9.4 moles of ibuprofen?
a)
5.66
b)
5.66x1024
c)
0.705
d)
1.25x1023
28.
How many molecules are in 2.5 mol of acetaminophen?
a)
1.51x1023
b)
146
c)
4.15
d)
1.51x1024
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