Worksheets#8C Quizziz Stoichiometry: Percent Composition Determining
Total questions: 10
Worksheet time: 1hrs 12mins
Name
Class
Date
1.
A formula with the lowest whole # ratio of elements in a compound is called
a)
Molecular Formula
b)
Chemical Formula
c)
Empirical Formula
d)
Distance Formula
2.
Which of the following is considered an empirical formula?
a)
CH3COOH
b)
C6H12O6
c)
H2O
3.
What is the empirical formula for the following:
Pb5Cr5O20
Pb5Cr5O20
a)
Pb2Cr2O10
b)
PbCr2O7
c)
Pb9Cr4O2
d)
PbCrO4
4.
What is the percent composition of oxygen in MgO?
a)
20%
b)
40%
c)
50%
d)
60%
5.
What is the percent composition of magnesium in MgO?
a)
20%
b)
40%
c)
50%
d)
60%
6.
What is the percent composition of sodium in NaCl?
a)
39%
b)
61%
c)
35%
d)
65%
7.
What is the percent composition of chlorine in NaCl?
a)
39%
b)
61%
c)
35%
d)
65%
8.
What is the percent composition of sulfur in the compound MgSO4?
a)
20%
b)
27%
c)
46%
d)
53%
9.
What is the percent composition of magnesium in the compound MgSO4?
a)
20%
b)
27%
c)
46%
d)
53%
10.
What is the percent composition of Benzene, C6H6?
a)
C = 50%
H = 50%
H = 50%
b)
C = 85.7 %
H = 14.3%
H = 14.3%
c)
C = 92.2%
H = 7.8%
H = 7.8%
d)
C = 71.9%
H = 28.1%
H = 28.1%
100 %
