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WorksheetsEmpirical formula
Total questions: 7
Worksheet time: 31mins
An empirical formula:
is the simplest whole-number ratio of moles of elements in the compound,
is a formula that calculates the coefficients of a compound in a balanced equation.
Which pair has the same empirical formula?
NaCrO4 and Na2Cr2O7
C2H4O2 and C6H12O6
C3H6O3 and C2H6O2
CH4 and C2H6
A 5.00 g sample of a compound consisting of calcium and chlorine contains 1.82 g of calcium and 3.23 g of chlorine. What is the empirical formula
CaCl2
Ca2Cl2
Ca2Cl4
Ca4Cl2
A 154 g sample of a compound contains 15.01 g of C and 62.03 g of Cl. What is the empirical formula for this compound.
CCl3
C4Cl
CCl4
CCl
What is the empirical formula if you have 36.84% nitrogen and 63.16% oxygen?
NO
N2O4
N2O3
N2O5
You are given the following percentages: 40.05% S and 59.95% O. Find the empirical formula for these elements. (keep two decimal places throughout calculations.)
SO
SO2
SO3
SO4
What is the empirical formula if you have 88.80% copper and 11.20% oxygen?
Cu3C8
Cu2O
CuO4
Cu4O10
