WorksheetsEmpirical Formula Practice
Total questions: 12
Worksheet time: 25mins
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.
What is the empirical formula of the following molecular formula: C3H6
a)
C3H6
b)
CH2
c)
C2H4
d)
CH3
3.
What is the empirical formula for the following:
Pb5Cr5O20
Pb5Cr5O20
a)
Pb2Cr2O10
b)
PbCr2O7
c)
Pb9Cr4O2
d)
PbCrO4
4.
Which pair has the same empirical formula?
a)
NaCrO4 and Na2Cr2O7
b)
C2H4O2 and C6H12O6
c)
C3H6O3 and C2H6O2
d)
CH4 and C2H6
5.
What is the empirical formula for hydrogen peroxide (H2O2)?
a)
H2O
b)
H2O2
c)
HO
d)
HO2
6.
Glucose has the formula C6H12O6. Maltose has the chemical formula C12H22O11. Do the have the same empirical formula?
a)
Yes
b)
No
7.
Which of these is NOT an empirical formula?
a)
CH2
b)
C2H5
c)
C6H4
d)
C3H7
e)
C5H17
8.
Molar mass is in units of ________.
a)
grams
b)
grams/mole
c)
mole
d)
moles/gram
9.
Calculate the molar mass of water (H2O).
a)
10 g/mol
b)
17 g/mol
c)
18 g/mol
d)
34 g/mol
10.
What is the empirical formula for N2S3?
a)
NS
b)
N3S2
c)
N2S3
d)
N1S1.5
11.
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
12.
What is the empirical formula if you have 36.84% nitrogen and 63.16% oxygen?
a)
NO
b)
N2O4
c)
N2O3
d)
N2O5
100 %
