C4H9COOH+C3H7OH=C4H9COOC3H7+H2O
CH3-CH2-CH2-CH2-OH + HCl = CH3-CH2-CH2-CH2-Cl + H2O
Xg 80.3g
C6H10O3+2HCl=C5H12O3Cl2
130g 203g
x=130*80.3/203=51.4g
Дано
m(H2) = 20 g
------------------------
m(Zn) -?
Zn+2HCL-->ZnCL2+H2
M(H2) = 2 g/mol
n(H2) = m/M = 20/2 = 10 mol
n(Zn) = n(H2) = 10mol
M(Zn) = 65 g/mol
m(Zn) = n*M = 65*10 = 650 g
ответ 650 г