The mass fraction of carbon in the saturated hydrocarbon is 83%. Find the molecular formula

The mass fraction of carbon in the saturated hydrocarbon is 83%. Find the molecular formula if the vapor density of this substance for hydrogen is 29.

M = 29 * 2 = 58 g / mol
let’s say we have 1 mole of substance
then the mass of carbon in it will be equal to 58 * 0.83 = 48
48:12 = 4 – carbon atoms in the compound
this is butane C4H10



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