The empirical formula of a compound is NO2. Its molecular mass is 9.2g/mol. What is its molecular formula?

Molecular formula = N2O4

Explanation:

The empirical formula of a compound is NO2. Its molecular mass is 92g/mol. What is its molecular formula?

Step 1: Data given

The empirical formula = NO2

The molecular formula = NO2

Molar mass N = 14 g/mol

Molar mass O = 16 g/mol

Step 2: Calculate molecular mass of the empirical formula

Molar mass NO2 = molar mass N + Molar mass of 2*O

Molar mass NO2 = 14 + 2*16

Molar mass = 46 g/mol

Step 3: Calculate the molecular formula

We have to multiply the empirical formula by n

n = molecular mass / molecular mass of the empirical formula

n = 92 g/mol / 46 g/mol

n = 2

We have to multiply the empirical formula by 2

Molecular formula = 2 * (NO2)

Molecular formula = N2O4