A) MG + 2HCL → MGCL2 + 2 (1)MGO + 2HCL → MGCL2 + H2O (2)B) THEO PTHH (...

Câu 2 :a) Mg + 2HCl → MgCl

2

+

2

(1)MgO + 2HCl → MgCl

2

+ H

2

O (2)b) Theo PTHH (1) có n

Mg

= n

khí

= 0,05 mol→ m

Mg

= 0,05.24 = 1,2 gam; m

MgO

= 9,2 – 1,2 = 8 gam.