a) \(n_{KClO_3}=\frac{24,5}{122,5}=0,2\left(mol\right)\)
\(2KClO_3\underrightarrow{t^O}2KCl+3O_2\)
0,2_________0,2____0,3(mol)
b) \(V_{O_2}=0,3.22,4=6,72\left(l\right)\)
c) nO2=0,3(mol)
\(2Mg+O_2\underrightarrow{t^O}2MgO\)
0,6_____0,3____0,6(mol)
\(m_{Mg}=0,6.24=14,4\left(g\right)\)
\(m_{MgO}=0,6.40=24\left(g\right)\)
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