N 0, 0825 MOLN 0, 045 MOL 3 4B O ASAL TA CĨ
Câu 27:
n 0, 0825 moln 0, 045 mol 3
4
B
O
aS
Al
Ta cĩ :
n 0, 015 mol n n 0, 045 mol
2
3
Al(OH)
Mg
n 0, 015 mol
Mg(OH)
2
2
SO
4
aS
BTNT
m 22,1175 n 0, 0225 molAl O
MgO