WorksheetsEmpirical Formulas
Total questions: 8
Worksheet time: 13mins
Name
Class
Date
1.
What is the empirical formula if you have 36.84% nitrogen and 63.16% oxygen?
a)
NO
b)
N2O3
c)
N2O4
d)
N2O5
2.
An empirical formula:
a)
is a formula that calculates the coefficients of a compound in a balanced equation.
b)
is the simplest whole-number ratio of moles of elements in the compound.
3.
What do you do when you get a half in the ratio?
a)
add 2 to each element
add two to only the one with the half
add two to only the one with the half
b)
multiply the one with the half only by two
c)
multiply all of them by two
d)
add two to all of the ratios
4.
What is the empirical formula if you have 88.80% copper and 11.20% oxygen?
a)
Cu3O8
b)
CuO4
c)
Cu2O
d)
Cu4O10
5.
What is the empirical formula of the following molecular formula: C3H6
a)
C3H6
b)
CH2
c)
C2H4
d)
CH3
6.
Which one is empirical?
a)
H2O2
b)
C2H6O12
c)
CaCl2
d)
N2O8
7.
What is the empirical formula for a compound containing the following ratio:
3Na:1P:4O
3Na:1P:4O
a)
NaPO4
b)
Na3P4O
c)
Na3PO4
d)
NaPO
8.
A compound came out with the following ratio
3 Carbon: 1.49 Phosphorus: 2 Oxygen- what would be the empirical formula?
3 Carbon: 1.49 Phosphorus: 2 Oxygen- what would be the empirical formula?
a)
Ca6P3O4
b)
C3PO2
c)
C6P3O4
d)
C3P3O2
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