a,\(2Zn+O_2\rightarrow2ZnO\)
\(n_{ZnO}=\frac{81}{81}=1\left(mol\right)\)
\(n_{O2}=\frac{1}{2}n_{ZnO}=\frac{1}{2}n_{Zn}=0,5\left(mol\right)\)
\(\Rightarrow m_{Zn}=1.65=65\left(g\right)\)
\(m_{O2}=0,5.32=16\left(g\right)\)
b,\(2KClO_3\rightarrow2KCl+3O_2\)
\(n_{O2}=\frac{1}{80}.100=1,25\left(mol\right)\)
\(n_{KClO3}=0,83\left(mol\right)\)
\(\Rightarrow m_{KClO3}=0,83.122,5=102,083\left(g\right)\)
Câu a của bạn dưới đúng, câu b em xem nhé!
b) PTHH: 2 KClO3 -to-> 2 KCl + 3 O2
1/3______________________0,5(mol)
Vì : H= 80% => nKClO3(TT)= 1/3 : 80%=5/12(mol)
=> \(mKClO3\left(TT\right)=\frac{5}{12}.122,5\approx51,042\left(g\right)\)
