Question

a) Mg +O2 - MgO

b) Fe +Cl2 - FeCl3

c) Al (OH)3 -Al2O3 +H2O

d) CaCO3 +HCl - CaCl2 +H2O +CO2

Answer 1

a/ 2Mg + O₂ ==> 2MgO

b/ 2Fe + 3Cl₂ ===> 2FeCl₃

c/ 2Al(OH)₃ =(nhiệt)=> Al₂O₃ + 3H₂O

d/ CaCO₃ + 2HCl ===> CaCl₂ + CO₂ + H₂O

Answer 2

a) 2 Mg +O₂ ->2 MgO

b)2 Fe +3 Cl₂ -> 2 FeCl₃

c)2 Al(OH)₃ -> Al₂O₃ +3 H₂O

d) CaCO₃ +2 HCl -> CaCl₂ +H₂O +CO₂

Answer 3

a) \(2Mg+O_2\rightarrow2MgO\)

b) \(2Fe+3Cl_2\rightarrow2FeCl_3\)

c) \(4Al\left(OH\right)_3\rightarrow2Al_2O_3+6H_2O\)

d)\(CaCO_3+2HCl\rightarrow CaCl_2+H_2O+CO_2\)

Answer 4

2Mg+O2--»2MgO2

Fe+3Cl2--»2FeCl3

2Al(OH)3+Al2O3+3H2O

CaCO3+2HCl--»CaCl2+H2O+CO2