WorksheetsEmpirical Formulas
Total questions: 10
Worksheet time: 28mins
A compound is 56.58% K, 8.69% C, and 34.73% O by mass. What is its empirical formula.
KCO
K2CO
KCO3
K2CO3
A compound is 52.14%C, 13.13%H, and 34.73% O by mass. What is its empirical formula?
CH3OH
CH3CH2OH
CH3CH2CH2OH
CHO
A compound is 27.7% Mg, 23.6% P, 48.7% O by mass. What is its empirical formula?
MgPO4
Mg3PO4
Mg3(PO4)2
Mg2(PO4)3
A compound is 77.27% U, 10.4% O, and 12.3% F. What is its empirical formula?
UOF
UO2F2
U2OF
U2O2F
A compound is 16.3% C, 32.1% Cl and 51.6% F by mass. What is the empirical formula?
C3Cl2F6
C1.5Cl F3
C2Cl3F6
C3Cl6F2
What is the % nitrogen in NH4NO3?
28.0 %
14.0 %
80.0 %
35.0 %
Which compound has the highest percent copper?
cuprite, Cu2O
copper pyrite, CuFeS2
malachite, CuCO3Cu(OH)2
copper (I) permanganate, Cu(MnO4)2
Determine the empirical formula for a compound that is 63.53 % Fe and 36.47 % S by mass.
Fe2S3
FeS
FeS2
Fe3S2
Determine the empirical formula for a compound that is 23.3% Co, 25.3% Mo and 51.4% Cl by mass. What is the empirical formula?
Co Mo Cl4
Co3Mo2Cl11
Co2MoCl3
Co2MoCl9
3.245 g of a compound containing titanium and chlorine is separated into elements. If 0.819 g of the sample is titanium, what is the empirical formula of the compound? HINT: find the mass of chlorine first.
TiCl4
TiCl
TiCl3
TiCl2
