CHÚC BẠN HỌC TỐT!
PTHH: \(2Al+6HCl\rightarrow2AlCl_3+3H_2\uparrow\)
ADĐLBTKL, ta có: \(m_{Al}+m_{HCl}=m_{AlCl3}+m_{H2}\)
\(\Rightarrow m_{Al}=m_{AlCl3}+m_{H2}-m_{HCl}\)
\(\Rightarrow m_{Al}=8,9+0,2-7,3=1,8\left(g\right)\)
Vậy............
nhớ ghi m nữa nhan.
al+hcl=alcl3+h2
al+7.3=8.9+0.2
al=(8.9+0.2)-7.3
al=1.8