\(a)Ancol : C_nH_{2n+2}O\\ n_C = n_{CO_2}= \dfrac{17,6}{44} = 0,4(mol)\\ n_H = 2n_{H_2O} = 2.\dfrac{9}{18} = 1(mol)\\ \Rightarrow \dfrac{n}{2n+2} = \dfrac{0,4}{1}\\ \Rightarrow n = 4\\ CTPT: C_4H_{10}O\)
b)
\(CH_3-CH_2-CH_2-CH_2-OH\) : butan-1-ol (bậc 1)
\(CH_3-CH(OH)-CH_2-CH_3\) : butan-2-ol (bậc 2)
\(CH_3-CH(CH_3)-CH_2-OH\) : 2-metyl propan-1-ol (bậc 1)
\(CH_3-C(CH_3)_2-OH\) : 2-metyl propan-2-ol (bậc 3)