C6H12O6 -mr-> 2C2H5OH + 2CO2
180____________92________88
60_____________30.67______88/3
Khối lượng C2H5OH: 30.67kg
H%= 21.12:88/3 *100%= 72%
60kg = 60000g
C6H12O6 => (men rượu,to) 2CO2 + 2C2H5OH
nC6H12O6 = 60000/180 = 1000/3 (mol)
==> nC2H5OH = 2000/3 (mol)
=> mC2H5OH = 2000/3 x 46 = 30666 g = 30.67 kg
nCO2 thu được = m/M = 21.12/44 = 0.48 (mol)
H% = 0.48 x 100/2/3 = 72 %