I2=(U2.I1)/U1=(36.I1)/U1

nO2=4,4/32=0,1375(mol)

VO2=0,1375.22,4=3,08(l)

nO2=4,4/16=0,275(mol)

VO2=0,275.22,4=6,16 l

3Fe + 2O2 --to--> Fe3O4

Fe3O4 + 8HCl ---> 2FeCl3 +fecl2 + 4H2O

h2 vao h2O khong co hien tuong ma ban

n Al2O3=25,5/102=0,25(ml=ol)

4Al + 3O2 --to-> 2Al2O3

0,5 0,375 <--- 0,25

mAl=0,5.27=13,5(g)

VO2=22,4.0,375=8,4(l)

nxh3=1.12/22,4=0,05(mol)

Mxh3=0.85/0,05=17(g/mol)

X=17-3=14(g/mol)

vay x la N.cthh cua hop chat laNH3

cau1; mg + cl2 -nhiet do-> mgcl2

cau3;fe+2hcl ---> fecl2 +h2

o,1--> 0.1

nfe=5,6/56=0.1 mol

vh2=0,1.22,4=2.24(l)

tinh so mol cua p la:np=15,5/31=0,5(mol) viet pt suy mol cua p2o5 sau do tinh m p2o5 va suy so mol cua oxi dung ct v=n/22,4

al td voi cl tao khi tinh mol khi suy he pt tinh khoi luong al lay khoi luong hh - khoi luong al tinh duoc khoi luong nhom oxit sau do tinh thanh phan phan tram.b)tu im

2 so mol cua 2 hon hop suy he pt tinh mol cua hcl tinh m hcl sau do tinh mddhcl dung cong thuc v=m/d tinh duoc vdd can t