To find the molecular formula of this compound, what we're going to do is to follow up the steps:
Step 1: Pass all the percentages to grams. This is, just to change the unit:
Step 2: Divide each mass by respective molar mass to obtain the moles of each element:
Step 3: Divide all the amounts in moles through by smaller value obtained:
These are the subscripts for C and H respectively. Thus our empirical formula is CH2. We're asked to find the molecular formula so, we could use the fact that the compound has a molecular weight of 112 g/mol. If we analyze, CH2 has a molecular weight of 14g/mol, so:
Step 4: We're going to divide the molecular weight of the compound with molecular formula through by the molecular weight of the compound with empirical formula:
This means that our molecular formula will be eight times the subscripts of the empirical formula. Therefore, the answer is: