Đề bài trog ảnh

`a)`

`n_C=n_{CO_2}={57,94}/{44}≈1,32(mmol)`

`->m_C=1,32.12=15,84(mg)`

`n_H=2n_{H_2O}=2.{11,85}/{18}≈1,32(mmol)`

`->m_H=1,32.1=1,32(mg)`

`->m_O=20,63-1,32-15,84=3,47(mg)`

`b)`

`n_O={3,47}/{16}≈0,22(mmol)`

`n_C:n_H:n_O=1,32:1,32:0,22=6:6:1`

`->` CTTN: `(C_6H_6O)_n`

`c)`

`M_Y=(12.6+6+16).n=94`

`->n=1`

`->Y:C_6H_6O`