The relative plane of the hydrocarbon in terms of hydrogen is 28 mass fraction of carbon is 0.8641 mass

The relative plane of the hydrocarbon in terms of hydrogen is 28 mass fraction of carbon is 0.8641 mass fraction of hydrogen 0.1429 Determine the molecular formula and write down the abbreviated structural formula It is known that carbon contains one double bond.

Let’s implement the solution in stages:
1. Let’s write down the hydrocarbon formula schematically – CxNy.
2. Let’s calculate the molecular weight by the formula: M (CXNU) = M (H2) * D (H2) = 2 * 28 = 56 g / mol.
3. Determine the amount of moles of carbon, hydrogen, if the mass fractions are known:
Y (C) = 86.41 / 12 = 7.2 mol;
Y (H) = 14.29 / 1 = 14.29 mol.
4. Ratio: X: Y = C: H = 7.2: 14.29 = 1: 2.
5. The simplest formula: CH2.
6. Hydrocarbon refers to alkenes, hence the general formula: CnH2n.
7. Let’s make the calculations:
CnH2n = 56 g / mol;
12n + 2 = 56;
12n = 54;
n = 4.5
8. Molecular formula – C4H8 (butene).
9. Structural formula: H3C – CH2 – CH = CH2.
Answer: C4H8 (butene).