Worksheets01-27-2024Quiz
Total questions: 10
Worksheet time: 34mins
Name
Class
Date
1.
A compound consists of 72.2% magnesium(Mg) and 27.8% nitrogen(N) by mass. What is the empirical formula?
a)
Mg4N3
b)
MgN2
c)
Mg3N2
d)
MgN
2.
Which of the following is considered an empirical formula?
a)
C2H4CO2
b)
C6H12O6
c)
H2O
3.
What percentage of the total atomic mass of carbon monoxide (CO) is composed of oxygen?
a)
29%
b)
43%
c)
57%
d)
73%
4.
What percentage of the total atomic mass of magnesium bromide (MgBr2) is composed of magnesium?
a)
13%
b)
43%
c)
63%
d)
87%
5.
What percentage of the total atomic mass of lithium phosphide (Li3P) is composed of lithium? Hint - consider all three atoms of lithium in your calculation.
a)
13%
b)
29%
c)
40%
d)
60%
6.
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
7.
What is the empirical formula for C4H6?
a)
CH
b)
CH3
c)
C2H3
d)
C4H6
8.
Which pair has the same empirical formula?
a)
NaCrO4 and Na2Cr2O7
b)
C2H4O2 and C6H12O6
c)
C3H6O3 and C2H6O2
d)
CH4 and C2H6
9.
You are given 40.05g S and 59.95g O. Find the empirical formula for these elements.
a)
SO
b)
SO2
c)
SO3
d)
SO4
10.
Empirical Formula = CF2
Molecular formula mass = 192 g/mol
Molecular Formula = ?
a)
C4F8
b)
C8F4
c)
C3F6
d)
C2F4
100 %
