\(\begin{array}{l}
1)\\
AgN{O_3} + NaCl \to AgCl + NaN{O_3}\\
nAgCl = nNaCl = 0,1 \times 0,1 = 0,01\,mol\\
\Rightarrow mAgCl = 0,01 \times 143,5 = 1,435g\\
2)\\
KCl{O_3} + 6HCl \to 3C{l_2} + KCl + 3{H_2}O\\
nKCl{O_3} = \dfrac{{24,5}}{{122,5}} = 0,2\,mol\\
\Rightarrow nC{l_2} = 0,2 \times 3 = 0,6\,mol\\
2Fe + 3C{l_2} \to 2FeC{l_3}\\
nFe = \dfrac{{0,6 \times 2}}{3} = 0,4\,mol\\
mFe = 0,4 \times 56 = 22,4g\\
3)\\
KCl{O_3} + 6HCl \to 3C{l_2} + KCl + 3{H_2}O\\
C{l_2} + 2KI \to 2KCl + {I_2}\\
nC{l_2} = n{I_2} = \dfrac{{38,1}}{{254}} = 0,15\,mol\\
nKCl{O_3} = \dfrac{{0,15}}{3} = 0,05\,mol\\
mKCl{O_3} = 0,05 \times 122,5 = 6,125g
\end{array}\)