Answer:
The molecular formula for this compound is C4H8 (option A)
Explanation:
Step 1: Data given
Empirical formula of the compound is CH2
Molar mass of the compound is 56 g/mol
Step 2:
Since the empirical formula is CH2, this means we have 1 mol C for each 2 mol H
The molar mass of the empirical formula = 12 + 2*1 = 14 g/mol
To find the molecular formula we have to multiply the empirical formula by n.
n = molar mass of molecular formula / molar mass of empirical formula
n = 56 / 14
n = 4
Molecular formula = 4*(CH2) = C4H8
We can check this by calculating the molar mass of this formula
4*12 + 8*1 = 48+8 = 56 g/mol
The molecular formula for this compound is C4H8 (option A)
