Answer:
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
