Resposta:Segue as respostas abaixo na explicação
Explicação:
1)n1=23 mols,n2=62 mols,ns-?,x1=?,x2=?
ns=mn1+n2 x1=n1/ns x2=n2/ns
ns=23+62 x1=23/85 x2=62/85
ns=85 mols x1=0,27 molar x2=0,73 molar
2)n1=12 mols,n2=30 mols,ns-?,x1=?,x2=?
ns=mn1+n2 x1=n1/ns x2=n2/ns
ns=12+30 x1=12/42 x2=30/42
ns=42 mols x1=0,286 molar x2=0,714 molar
3)n1=15 mols,n2=22 mols,ns-?,x1=?,x2=?
ns=mn1+n2 x1=n1/ns x2=n2/ns
ns=15+22 x1=15/37 x2=22/37
ns=37 mols x1=0,4 molar x2=0,6 molar
4)n1=12 mols,n2=31 mols,ns-?,x1=?,x2=?
ns=mn1+n2 x1=n1/ns x2=n2/ns
ns=12+31 x1=12/43 x2=31/43
ns=43 mols x1=0,28 molar x2=0,72 molar
5)n1=20 mols,n2=47 mols,ns-?,x1=?,x2=?
ns=mn1+n2 x1=n1/ns x2=n2/ns
ns=20+47 x1=20/67 x2=47/67
ns=67 mols x1=0,3 molar x2=0,7 molar
6)n1=10 mols,n2=50 mols,ns-?,x1=?,x2=?
ns=mn1+n2 x1=n1/ns x2=n2/ns
ns=10+50 x1=10/60 x2=50/60
ns=60 mols x1=0,17 molar x2=0,83 molar