CE chem pastpaper MC 疑難

(2)consider the following information:

compound (relative molecular mass)
CH3 CH2 OH (46)
CH3 CH2 OCH3 (60)
CH3 CH2 CO2 CH3 (88)
C6 H12 O6 (180)

When 1g of each of these compounds undergoes complete combustion, which one will produce the greatest number of moles of carbon dioxide?
A. CH3 CH2 OH
B. CH3 CH2 OCH3
C. CH3 CH2 CO2 CH3
D. C6 H12 O6 ( ans: B )