\(n_{CO_2}=\dfrac{1,4}{22,4}=0,0625\left(mol\right)\)
\(n_{H_2O}=\dfrac{1,35}{18}=0,075\left(mol\right)\)
Bảo toàn C: nC = 0,0625
Bảo toàn H: nH = 0,15
=> \(n_O=\dfrac{1,3-0,0625.12-0,15}{16}=0,025\left(mol\right)\)
Xét nC : nH : nO = 0,0625 : 0,15 : 0,025 = 5 : 12 : 2
=> CTPT: C5H12O2