a) \(n_{Mg}=\frac{m_{Mg}}{M_{Mg}}=\frac{7,2}{24}=0,3\left(mol\right)\)
\(2Mg+O_2\underrightarrow{t^o}2MgO\)
\(0,3\) \(0,15\) \(0,3\) \(\left(mol\right)\)
\(m_{MgO}=n_{MgO}.M_{MgO}=0,3.40=12\left(g\right)\)
b) \(V_{O_2}=n_{O_2}.22,4=0,15.22,4=3,36\left(l\right)\)
\(V_{O_2}=\frac{1}{5}.V_{kk}\Rightarrow V_{kk}=5.V_{O_2}=5.3,36=16,8\left(l\right)\)
c) \(2KClO_3\underrightarrow{t^o}2KCl+3O_2\)
\(0,1\) \(0,1\) \(0,15\) \(\left(mol\right)\)
\(m_{KClO_3}=n_{KClO_3}.M_{KClO_3}=0,1.122,5=12,25\left(g\right)\)
