Ta có: \(n_{Zn}=\dfrac{26}{65}=0,4\left(mol\right)\)
\(a.PTHH:2Zn+O_2\overset{t^o}{--->}2ZnO\)
b. Theo PT: \(n_{ZnO}=n_{Zn}=0,4\left(mol\right)\)
\(\Rightarrow m_{ZnO}=0,4.81=32,4\left(g\right)\)
c. Theo PT: \(n_{O_2}=\dfrac{1}{2}.n_{Zn}=\dfrac{1}{2}.0,4=0,2\left(mol\right)\)
\(\Rightarrow m_{O_2}=0,2.32=6,4\left(g\right)\)