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Worksheetsempirical and molecular formulas practice
Total questions: 10
Worksheet time: 20mins
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.
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
3.
Given the following: 42.07% Na, 18.89% P, and 39.04% O, determine the empirical formula.
a)
NaPO2
b)
Na2PO3
c)
Na3PO4
d)
NaPO4
4.
What is the molecular formula for a compound with the empirical formula: K2SO4 and a molecular mass of 696g.
a)
K2SO4
b)
K8SO16
c)
K8S4O8
d)
K8S4O16
5.
What is the empirical formula for the following molecular formula: C6H14
a)
C6H14
b)
C3H7
c)
CH2
d)
CH3
6.
What is the molecular formula if the empirical formula is CH2O and the molecular molar mass is 120?
a)
CH2O
b)
C2H4O2
c)
C4H8O4
d)
C6H12O6
7.
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
8.
Choose the correct empirical formula for this molecular formula C4H6
a)
CH
b)
CH3
c)
C2H3
d)
C4H6
9.
What is the empirical formula for this molecular formula C25H45
a)
C25H45
b)
CH
c)
C5H9
d)
C9H5
10.
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