WorksheetsUnit Six - The Mole
Total questions: 16
Worksheet time: 52mins
Name
Class
Date
1.
What is the molar mass of dihydrogen dioxide?
a)
48 g/mole
b)
34.02 g/mole
c)
36.5 g/mole
d)
35.5 g/mole
2.
What is the mass of one mole of aluminum?
a)
26.982 g
b)
13 g
c)
53.985 g
d)
14 g
3.
Which of the following dimensional analysis setups will correctly convert 4.00x1023atoms of cobalt to moles of cobalt? How many moles of colbalt are there?
a)
B : 0.664mol Co
b)
A: 2.41x1047mol Co
c)
A : 0.664mol Co
d)
B: 2.41x1047mol Co
4.
What do we call the SI unit for amount of a substance?
a)
Avogadro's number
b)
kilogram
c)
mole
d)
liter
5.
What is the relationship between 1 mol of a substance and its mass in grams?
a)
Its molar mass found on the Periodic Table
b)
Avogadro's Number
c)
Its atomic number found on the Periodic Table
d)
Planck's Constant
6.
Which of the following dimensional analysis setups will correctly convert 2.50 moles of sodium to grams of sodium?
a)
A
b)
B
c)
C
d)
D
7.
Based on the info below, solve for the molecular formula:
Empirical formula = NO
Molecular formula mass = 59.98g
Empirical formula = NO
Molecular formula mass = 59.98g
a)
NO
b)
N2O3
c)
N2O2
d)
N4O4
8.
What is the mass of one mole of aluminum?
a)
26.98 g
b)
13 g
c)
53.985 g
d)
14 g
9.
What is the percent composition of a compound that contains 40.8 g carbon and 54.4 g oxygen?
a)
42.9 % carbon; 57.1% oxygen
b)
57.1 % carbon; 42.9 % oxygen
c)
40.8 % carbon; 54.4 % oxygen
d)
54.4 % carbon; 40.8% oxygen
10.
Avogadro's number of representative particles is equal to one_____.
a)
kilogram
b)
gram
c)
kelvin
d)
mole
11.
What do we call 6.022 x 1023?
a)
Avogadro's Number
b)
Avocado Number
c)
A dozen
d)
Louis
12.
What are the units for molar mass?
a)
grams
b)
amu
c)
grams/mole
d)
liters
13.
What is the molar mass of calcium hydroxide (Ca(OH)2)?
a)
74.10 g/mole
b)
57.12 g/mole
c)
58.19 g/mole
d)
none of the above
14.
Determine the molar mass for CCl4
a)
153.8 g/mol
b)
47.54 g/mol
c)
189.35 g/mol
d)
82.9 g/mol
15.
What is the molar mass of (NH4)2CO3 ?
a)
144.05 g
b)
138.24 g
c)
96.09 g
d)
78.14 g
16.
You are given the following percentages: 40.05% S and 59.95% O. Find the empirical formula for these elements. (keep two decimal places throughout calculations)
a)
SO
b)
SO2
c)
SO3
d)
SO4
100 %
