vi la axit no ,ho nen co ct ptu la C(3n/2)H(5n/2)(COOH)3n/2ma la axit no nen bao toan ngtu hidro ta co 3n/2+5n/2=2\times3n/2+2 \Rightarrow n=2 CTPT la C3H5(COOH)3
vi la axit no ,ho nen co ct ptu la C(3n/2)H(5n/2)(COOH)3n/2ma la axit no nen bao toan ngtu hidro ta co 3n/2+5n/2=2*3n/2+2 suy ra n=2 CTPT la C3H5(COOH)3