Question

de dieu che khi oxi nguoi ta dung kclo3nhiet phan 

a, viet phuong trinh phan ung tren 

b, tinh the tich khi oxi thu dc ( o dctc ) khi nhiet phan 73,5 g kclo3

c, tinh khoi luong zno duoc tao thanh khi cho luong khi oxi sinh ra o tren tac dung vs 13g zn 

Answer 1

Kclo3nhiet là j vậy

Answer 2

a,\(2KClO_3\rightarrow2KCl+3O_2\)

b, \(n_{KClO_3}=m_{KClO_3}:M_{KClO_3}=73,5:\left(39+35,5+3.16\right)=0,6\left(mol\right)\)

THeo PTHH: \(n_{O_2}=\frac{3}{2}n_{KClO_3}=\frac{3}{2}.0,6=0,9\left(mol\right)\)

\(\Rightarrow V_{O_2}=n_{O_2}.22,4=0,9.22,4=20,16\left(l\right)\)

c, \(2Zn+O_2\rightarrow2ZnO\)

\(n_{Zn}=m_{Zn}:M_{Zn}=13:65=0,2\left(mol\right)\)

Theo PTHH: \(n_{ZnO}=n_{Zn}=0,2\left(mol\right)\)

\(\Rightarrow m_{ZnO}=n_{ZnO}.M_{ZnO}=0,2.\left(65+16\right)=16,2\left(g\right)\)