Molecular Formula Determination Problems

The empirical formula of a compound is NO2. It's molecular mass is 92g/mol

What is its molecular formula?

• NO

• NO2

• N2O

• N2O4

The empirical formula of a compound is CH2. Its molecular mass is 70g/mol.

What is its molecular formula?

• CH2

• C2H2

• C5H10

• C5H5

A compound is found to be 40% carbon, 6.7% hydrogen, and 53.5% oxygen.

Its molecular mass is 60 g/mol. What is its molecular formula?

• CHO

• CH2O

• C2H4O2

• CH2O2

A compound is 64.9% carbon, 13.5% hydrogen, and 21.6% oxygen.

Its molecular mass is 74g/mol. What is its molecular formula?

• CH2O

• C4H10O

• C4H8O

• C4H10O2

A compound is 54.5% carbon, 9.1% hydrogen, and 36.4% oxygen. Its molecular mass is 88g/mol. What is its molecular formula?

• CH2O

• C4H6O

• C4H8O2

• C4H8O

What is the empirical formula of a compound 75% carbon and 25% hydrogen?

• CH2

• C2H4

• CH3

• CH4

What is the empirical formula of a compound that is 52.7% potassium and 47.3% chlorine?

• K2Cl

• KCl

• KCl2

• K2Cl2

What is the empirical formula of a compound that is 22.1% Al, 25.4% P, and 52.5% O?

• AlPO4

• AlPO3

• AlPO2

• Al2PO4

What is the empirical formula for a compound 13% Mg and 87% Br?

• MgBr

• MgBr2

• Mg2Br

• Mg2Br2

What is the empirical formula for a compound 32.4% sodium, 22.5% sulfur, and 45.1% oxygen?

• NaSO4

• Na(SO4)2

• Na2SO4