\(2KClO_3\rightarrow2KCl+3O_2\)
1__________________1,5
\(n_{O2}=\frac{42}{32}=1,5\left(mol\right)\)
\(m_{KClO_3}1.\left(39+35,5+16.3\right)=122,5\left(g\right)\)
\(2P+\frac{5}{2}O_2\rightarrow P_2O_5\)
_____1,5_____ 0,6
\(m_{P2O5}=0,6.\left(31.2+16.5\right)=85,2\left(g\right)\)