Determination of the molecular formula of alcohols

Exercise 4

    

$ 1\;g$ monocyclic saturated mono-alcohol is burned to provide $2.45\; g$ carbon dioxide 1) Determine the molecular formula! 2) Find all possible stylized (line-angle) formulas and names.

1) General formula: $C_nH_{2n}O$ Carbon mass in $CO_2$ = $m_C$ $=$ $\frac{2.45\cdot 12}{44}$ = $0.67\; g$ = Carbon mass in $1\;g$ alcohol Percentage of $C$ in the alcohol: $\frac{12n}{12n+2n+16}$ $=$ $\frac{0.67}{1}$ $n$ $=$ $4$ Molecular formula: $C_4H_8O$ 2)