Question

a hydrocarbon contains 82.7% C and 17,24% H by mass. 1 mole of hydrocarbon weighed 58g. find the molecular formula of the hydrocarbon

Answer 1

a hydrocarbon contains 82.7% C and 17,24% H by mass. 1 mole of hydrocarbon weighed 58g. find the molecular formula of the hydrocarbon

$$\begin{array}{l} C _ {X} H _ {Y} \\ X: Y = \frac {\omega (C)}{M (C)}: \frac {\omega (H)}{M (H)} = \frac {8 2 . 7}{1 2}: \frac {1 7 . 2 4}{1} = 6. 8 9: 1 7. 2 4 = 1: 2. 5 = 2: 5 \\ C _ {4} H _ {1 0} \\ M = 1 2 * 4 + 1 * 1 0 = 5 8 g / m o l \\ \end{array}$$ $$\mathbf {C} _ {4} \mathbf {H} _ {1 0}$$