The vapor density of organic matter for SO3 is 1.1, and the mass fractions of carbon

The vapor density of organic matter for SO3 is 1.1, and the mass fractions of carbon, hydrogen and oxygen are, respectively, 68.18%, 13.63%, 18.18%

Let’s implement the solution:
1. Given: CxHyOz – organic matter
D (SO3) = 1.1;
M (SO3) = 80 g / mol;
W (C) = 68.18%
W (H) = 13.63%
W (O) = 18.18%
Determine: molecular formula.
2. Calculation:
M (CxHyOz) = M (SO3) * D (SO3) = 80 * 1.1 = 88 g / mol.
3. Find the number of moles:
Y (C) = m / M = 68.8 / 12 = 5.7;
Y (H) = 13.6 / 1 = 13.63;
Y (O) = 18.18 / 16 = 1.13.
4. Ratio:
X: Y: Z = 5.7: 13, 6: 1.13 = 5: 12: 1;
Formula: С5Н12О;
C5H11OH – pentanol;
Checking: M (C5H12O) = 88 g / mol.
Answer: С5Н11ОН – amyl alcohol.