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WorksheetsThe Mole Chemistry
Total questions: 23
Worksheet time: 24mins
Name
Class
Date
1.
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
2.
What is Avogadro's Number?
a)
6.02 x 1023
b)
- 6.02 1023
c)
6.02 x 1022
d)
6,020,000,000,000
3.
Avogadro's number of representative particles is equal to one_____.
a)
kilogram
b)
gram
c)
kelvin
d)
mole
4.
A mole of Neon contains
6.02 x 1023 _____.
6.02 x 1023 _____.
a)
atoms
b)
formula units
c)
ions
d)
molecules
5.
The molar mass of an element is the mass of one ____ of the element.
a)
atom
b)
molecule
c)
mole
d)
gram
6.
What is the molar mass of one mole of Nitrogen N2?
a)
14.01 amu
b)
14.01 g
c)
28.02 g
d)
28.02 amu
7.
What is the molar mass of Carbon Dioxide (CO2)?
a)
12 amu
b)
12 g
c)
44 g
d)
44 amu
8.
What is the molecular formula if the empirical formula is C2H5 and the molecular molar mass is 58.14 g/mol?
a)
C2H5
b)
C4H10
c)
C1H2.5
d)
C4H8
9.
Find the percent composition of N2S2.
a)
N: 69.6% S: 30.4%
b)
N:36% S: 75.6%
c)
N: 96.6% S: 3.4%
d)
N: 30.4% S: 69.6%
10.
T/F
If 2 compounds have the same empirical formula, they are the same (same properties, structure, etc.)
If 2 compounds have the same empirical formula, they are the same (same properties, structure, etc.)
a)
True
b)
False
11.
Find the percent composition of Mg in Mg3(PO4)2.
a)
27.75% Mg
b)
23.57% Mg
c)
48.68% Mg
d)
13.45% Mg
12.
How many atoms of iodine are in a mole of iodine?
a)
53
b)
63.55g
c)
126.9
d)
6.02 x 1023
13.
Which has more molecules or formula units?
a)
1 mole H2O
b)
1 mole Al(OH)3
c)
1 mole NaCl
d)
There are all the same
14.
Which one is empirical?
a)
H2O2
b)
C2H6O12
c)
CaCl2
d)
N2O8
15.
How many moles are in 3.01 x 1022 atoms of magnesium?
a)
0.0500 moles
b)
1.81 x 1046 moles
c)
5.00 x 1021 moles
d)
5.00 moles
16.
A mole of potassium chloride contains 6.02 x 1023 _____.
a)
atoms
b)
formula units
c)
ions
d)
molecules
17.
How many molecules are in 2.00 moles of H2O?
a)
124x1024 molecules of H2O
b)
1.20x1023 molecules of H2O
c)
1.20x1024 molecules H2O
d)
124
18.
How many atoms are in 1.50 moles of Hg?
a)
9.03x1023 atoms Hg
b)
9.03x1024 atoms Hg
c)
903 atoms of Hg
d)
9.03 atoms of Hg
19.
What are the units for molar mass?
a)
grams
b)
amu
c)
grams/mole
d)
liters
20.
How many water molecules are in 5.2 moles of water?
a)
6.02 x 1023
b)
5.2
c)
3.1 x 1024
d)
8.638 x 10-24
21.
What type of particle is: Ag
a)
Atom
b)
Molecule
c)
Formula Unit
d)
Ion
22.
What type of particle is: KCl
a)
Atom
b)
Molecule
c)
Formula Unit
d)
Ion
23.
What type of particle is: NO2
a)
Atom
b)
Molecule
c)
Formula Unit
d)
Ion
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