The mass fraction of carbon in the hydrocarbon is 83.33%. The density of hydrocarbon vapor in air is 3.93.
| November 30, 2020 | education
The mass fraction of carbon in the hydrocarbon is 83.33%. The density of hydrocarbon vapor in air is 3.93. Determine the molecular formula of this substance.
molecular formula of hydrocarbon CxHy
if the mass fraction of carbon is 83.33 then the mass fraction of hydrogen is 16.67
x: y = 83.33 / 12: 16.67 / 1 = 7: 16
substitute and get
C7H16
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