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$n_{Zn}=0,15mol; n_{Al}=0,1mol;n_{HNO_3}=0,5mol;n_{H_2So_4}=0,15mol$ $n_{SO_4^{2-}}=0,15mol;n_{Zn^{2+}}=0,15mol; n_{Al^{3+}}=0,1mol$ ưu tiên tạo muối sunfat $\Rightarrow m_{muối}=m_{Zn^{2+}}+m_{Al^{3+}}+m_{SO_4^{2-}}+m_{NO_3^-}$ $=9,75+2,7+0,15.96+(0,15.2+0,1.3-0.15.2).62=45,45(g)$
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