WorksheetsMole Test Review 1st
Total questions: 25
Worksheet time: 34mins
Name
Class
Date
1.
Determine the molar mass for CCl4
a)
158.8 g/mol
b)
47.54 g/mol
c)
189.35 g/mol
d)
82.9 g/mol
2.
What is the percent composition of oxygen in water?
a)
1.125%
b)
112.5%
c)
0.889%
d)
88.9%
3.
If the empirical formula for a sugar is CH2O, what is a possible molecular formula for that sugar?
a)
C6H12O6
b)
C2H2O2
c)
CH4O
d)
none of the above
4.
What is the molar mass of sodium?
a)
11
b)
22.990
c)
45.98
d)
3
5.
What are the units for molar mass?
a)
grams
b)
amu
c)
grams/mole
d)
liters
6.
What is the mass of one mole of aluminum?
a)
26.982 g
b)
13 g
c)
53.985 g
d)
14 g
7.
What is the molar mass of table salt (NaCl)?
a)
116.886 g/mol
b)
35.453 g/mol
c)
22.990 g/mol
d)
58.443 g/mol
8.
The empirical formula for a compound that contains 36 g C, 8.0 g O, and 6.0 g H is
a)
C4H6O
b)
C6H12O
c)
C9H2O4
d)
C6H12O6
9.
How many moles are in 4.5x1024 particles?
a)
0.747 particles
b)
0.747 mol
c)
2.71x1047 mol
d)
2.71x1047 particles
10.
What is the molar mass of Mg3N2?
a)
191.6 g/mol
b)
76.64 g/mol
c)
38.32 g/mol
d)
100.95 g/mol
11.
How many moles of carbon atoms are there in 5g of carbon?
a)
60 mol
b)
17 mol
c)
0.42 mol
d)
7 mol
12.
How many molecules are there in 5.9 moles of NaCl?
a)
3.5x1024molecules
b)
9.79x10-24molecules
c)
1.02x1023molecules
13.
How many molecules are present in 69.0 moles of SrO?
a)
4.16x1025molecules
b)
8.72x1021molecules
c)
7,149.78 molecules
d)
6,893.32 molecules
14.
How many moles are there in 12.7g of CaF2?
a)
0.20 mol
b)
1,000.76 mol
c)
6.14 mol
d)
0.16 mol
15.
What is the mass of 9.4 moles of B2(Cr2O7)3?
a)
6.41 x 1022g
b)
5.67x1024 g
c)
49.11 g
d)
4,339.23 g
16.
How many moles of (NH4)2O are present in 74.9 g?
a)
3,907.0 moles
b)
1.44 moles
c)
8.67x1023moles
d)
0.79 moles
17.
How many molecules are present in 25 g of NaBr?
a)
102.96 molecules
b)
0.24 molecules
c)
1.45x1023 molecules
d)
2.34 x 1020molecules
18.
What is the mass of 54.3x1045molecules of BeO?
a)
3.27x1070 g
b)
9.01 x1022g
c)
2.25 x1024 g
d)
1.31 x1069g
19.
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
20.
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
21.
Avogadro's number of representative particles is equal to one_____.
a)
kilogram
b)
gram
c)
kelvin
d)
mole
22.
Where do you look to calculate the molar mass?
a)
avogadros number
b)
periodic table
23.
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
24.
The mass of one mole of an element is equal to
a)
its atomic number from the periodic table, but in amus.
b)
its atomic mass from the periodic table, but in amus.
c)
its atomic mass from the periodic table, but in grams.
d)
its atomic number from the periodic table, but in grams.
25.
How many formula units are in 2.5 moles of NaCl?
a)
1.5 x1024 formula units
b)
1.5 formula units
c)
4.2 formula units
d)
4.2 x10-24 molecules
100 %
