Câu 1:
\(Mg+Br_2\rightarrow MgBr_2\\ n_{Br_2}=\dfrac{11,2}{160}=0,07\left(mol\right)=n_{Mg}=n_{MgBr_2}\\ a=m_{Mg}=0,07.24=1,68\left(g\right)\\ m_{MgBr_2}=184.0,07=12,88\left(g\right)\)
Mg+Br2->MgBr2
0,07--0,07----0,07
n Br2=\(\dfrac{11,2}{160}\)=0,07 mol
=>m Mg=0,07.24=1,68g
=>m MgBr2=0,07.184=12,88g
Câu 2:
\(n_{Al}=\dfrac{14,58}{27}=0,54\left(mol\right)\\ 2Al+3Cl_2\rightarrow\left(t^o\right)2AlCl_3\\ n_{AlCl_3}=n_{Al}=0,54\left(mol\right)\\ n_{Cl_2}=\dfrac{3}{2}.0,54=0,81\left(mol\right)\\ V_{Cl_2\left(đktc\right)}=0,81.22,4=18,144\left(l\right)\\ m_{AlCl_3}=0,54.133,5=72,09\left(g\right)\)
2Al+3Cl2-to>2AlCl3
0,54--0,81-----0,54
n Al=\(\dfrac{14,58}{27}\)=0,54 mol
=>VCl2=0,81.22,4=18,114l
=>m AlCl3=0,54.133,5=72,09g