su la chat khi thi CM cung tinh nhu thuong CM=n/V
pt N2+3H2-->2NH3
tpu1        1     
pu 0.2     0.6    0.4
cb0.8   0.4        0.4
=>Kc=[NH3]^2/([N2]*   [H2]^3)
tupt=>hieu suat tinh theo H2=>H%=[H2](pu)/[H2](bd) *100
vi them N2 thi H% van tinh theo H2
Kc ko doi 
pt N2+3H2-->2NH3
tpu(1+x)        1     
pu 0.2     0.6    0.4
cb(0.8+x)   0.4        0.4
=>Kc=[NH3]^2/([N2]*   [H2]^3)  thay kc cau a vao
=>x=>n=CM*V
pt N2+3H2-->2NH3
tpu1        2     2
pu 0.5a   1.5a      a
cb(1-0.5a)  (2-1.5a) (2+a)
=>Kc=[NH3]^2/([N2]*   [H2]^3)=>a
hoac la tinh H% so voi bd neu H%>H