\(n_{Cl2}=0,3\left(mol\right)\)
\(n_{NaBr}=0,4\left(mol\right)\)
\(n_{NaI}=0,3\left(mol\right)\)
\(Cl_2+2NaI\rightarrow2NaCl+I_2\)
0,15___0,3_____0,3_________
\(Cl_2+2BaBr\rightarrow2NaCl+Br_2\)
0,15___0,3_______0,3_________
\(\Rightarrow m_{Cr}=m_{NaCl}+m_{NaBr_{Dư}}=45,5\left(g\right)\)