The relative density of vapors of organic matter in nitrogen is 6.5 Mass fraction of carbon in this substance is 39.56%

The relative density of vapors of organic matter in nitrogen is 6.5 Mass fraction of carbon in this substance is 39.56% Mass fraction of hydrogen is 7.69% Mass fraction of oxygen is 52.75% Derive the molecular formula of organic matter

The molecular weight of nitrogen is 28 g / mol. Let’s find the molecular weight of organic matter:
28 * 6.5 = 182 g / mol;

Find the molecular weight of carbon in the compound:
182 * 0.3956 = 72 g / mol;

Let’s find the number of carbon atoms in the compound (the relative atomic mass of carbon is 12):
72/12 = 6 atoms;

Find the molecular weight of oxygen in the compound:
182 * 0.5275 = 96 g / mol;

Let’s find the number of oxygen atoms in the substance (the relative atomic mass of oxygen is 16):
96/16 = 6 atoms;

Find the molecular weight of hydrogen in the compound:
182 * 0.0769 = 14 g / mol (the relative atomic mass of hydrogen is 1, therefore there are 14 hydrogen atoms in organic matter)

Answer: the formula for organic matter is C6H14O6.