mole數

(a)
Mole ratio C : H : O
= 54.5/12 : 9.1/1 : (100 - 54.5 - 9.1)/16
= 4.54 : 9.1 : 2.28
= 2 : 4 : 1

Let (C2H4O)n be the molecular formula.
(12x2 + 1x4 + 16)n = 88
44n = 88
n = 2

Hence, the molecular formula = C4H8O2

b)
One possible structure of Y: CH3COOCH2CH3
Its systematic name: ethyl ethanonate

c)
CH3COOH (ethanoic acid)
CH3CH2OH (ethanol)
Concentrated H2SO4 (concentrated sulphuric acid)
=