Chemical formula of vinegar

Solution: (1) Analyze and solve according to the sum of the relative atomic masses of the atoms that make up the molecule.

(2) Calculate according to the mass fraction of an element in the compound = [relative atomic mass × atomic number/relative molecular mass ]× 100%.

The molecular weight of (1)CH3COOH is12+1× 3+12+1= 60;

(2) The mass fraction of carbon in acetic acid is [12× 2/60 ]×100% = 40%.

So the answer is:

( 1)60; (2)40%.

The main component of vinegar is acetic acid, and the chemical formula is CH 3COOH. Please calculate:

The relative molecular weight of (1) acetic acid;

(2) The mass fraction of carbon in acetic acid.