WorksheetsMolar Mass and Molecular Mass
Total questions: 15
Worksheet time: 25mins
Name
Class
Date
1.
The molar mass of an element is equal to its...
a)
Atomic mass
b)
Atomic number
c)
Oxidation number
d)
Valence electrons
2.
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
3.
What is the mass of one mole of aluminum?
a)
27 g
b)
13 g
c)
54 g
d)
14 g
4.
How many particles are in a mole?
a)
602
b)
602 million
c)
602 moles
d)
6.02 x 1023
5.
Calculate the molar mass for Al(OH)3
a)
78.0 g/mol
b)
72 g/mol
c)
28 g/mol
d)
25 g/mol
6.
Molar mass is in units of ________.
a)
grams
b)
grams/mole
c)
mole
d)
moles/gram
7.
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
8.
What is the Molar Mass of Potassium Sulfide?..... :-) You get to figure out the formula.
a)
110.262 g/mol
b)
71.164 g/mol
c)
174.258 g/mol
d)
158.259 g/mol
9.
Which of the following is needed to determine the molar mass of a molecule?
a)
Types of elements in the molecule
b)
Quantity of elements in the molecule
c)
Mass of the elements in the molecule
d)
All are correct and needed.
10.
What is the molar mass of NaOH?
a)
40 g/mol
b)
38.989 g/mol
c)
23.998 g/mol
d)
57.004 g/mol
11.
Calculate the molar mass of Cu2O.
a)
37 g/mol
b)
45 g/mol
c)
79.5 g/mol
d)
143 g/mol
12.
The mass of one mole of substance is called...
a)
molecular mass
b)
mole constant
c)
molar mass
d)
atomic weight
13.
What is the molar mass of sodium?
a)
11 g/mol
b)
23 g/mol
c)
45.98 g/mol
d)
3 g/mol
14.
What is the molar mass of fluorine gas?
(beware -check your diatomics!)
a)
18.998 g/mol
b)
38 g/mol
c)
9 g/mol
d)
18 g/mol
15.
Avogadro’s number is:
a)
6.02 x 1022
b)
6
c)
6.02 x 1023
d)
3.01 x 1023
100 %
