**Steps i took:**

**1. Find moles.**

CO2 -> 0.0373moles, H2O -> 0.0448moles

**2. Find mass of C and H:**

C: 0.448g, H: 0.0905g

**3. Find % composition:**

C: 83.3%, H: 16.7%

^ this answer is correct, but...

**4. Find Empirical formula:**

I assume that there are 100g of sample.

So C will be 83.3g and H will be 16.7g. Then i find the number of moles, which is 6.93 (for C) and 16.5 (for H)... And get the smallest ratio which is 1:2, but the book says it's C5H12. ._.?