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WorksheetsEmpirical and Molecular Formula
Total questions: 16
Worksheet time: 29mins
Name
Class
Date
1.
Which pair has the same empirical formula?
a)
NaCrO4 and Na2Cr2O7
b)
C2H4O2 and C6H12O6
c)
C3H6O3 and C2H6O2
d)
CH4 and C2H6
2.
A formula with the lowest whole # ratio of elements in a compound is called
a)
empirical formula
b)
chemical formula
c)
covalent formula
d)
molecular formula
3.
A chemical formula that shows the actual # and kinds of atoms present in one molecule of a compound is called_________
a)
ionic formula
b)
covalent formula
c)
empirical formula
d)
molecular formula
4.
C2H6
a)
Empirical
b)
Molecular
5.
C6H12
a)
Empirical
b)
Molecular
6.
What is the empirical formula for the following molecular formula: C5H12
a)
C5H12
b)
CH3
c)
CH2
d)
C2.5H6
7.
Which pair has the same empirical formula?
a)
NaCrO4 and Na2Cr2O7
b)
C2H4O2 and C6H12O6
c)
C3H6O3 and C2H6O2
d)
CH4 and C2H6
8.
What is the molecular formula if the empirical formula is CH2O and the molecular molar mass is 180.18?
a)
CH2O
b)
C2H4O2
c)
C4H8O4
d)
C6H12O6
9.
Which pair has the same empirical formula?
a)
NaCrO4 and Na2Cr2O7
b)
C2H4O2 and C6H12O6
c)
C3H6O3 and C2H6O2
d)
CH4 and C2H6
10.
How many Carbons "C" are in C18H34O3
a)
18
b)
34
c)
3
d)
37
11.
What is the best definition for subscript?
a)
The big number that tells you the number of molecules.
b)
The atomic number
c)
The little number that tells the number of atoms for each element.
12.
Molecular Formula = C2F6
Choose the correct empirical formula.
a)
CF
b)
C2F6
c)
C3F
d)
CF3
13.
Which pair has the same empirical formula?
a)
NaCrO4 and Na2Cr2O7
b)
C2H4O2 and C6H12O6
c)
C3H6O3 and C2H6O2
d)
CH4 and C2H6
14.
Molecular Formula = Si2F6
Choose the correct empirical formula.
a)
SiF
b)
Si2F6
c)
SiF3
d)
Si4F12
15.
What is the empirical formula of K2SO4?
a)
K2SO4
b)
KSO2
c)
K2SO2
d)
KSO8
16.
A chemical formula that shows the actual # and kinds of atoms present in one molecule of a compound is called_________
a)
ionic formula
b)
covalent formula
c)
empirical formula
d)
molecular formula
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