Question

Cân bằng các PTHH sau:

1) K + Cl2 −−→ KCl

2) Fe + O2 −−→ Fe3O4

3) N2 + H2 −−→ NH3

4) Fe2O3 + H2 −−→ Fe + H2O

5) Mg + CO2 −−→ MgO + C 

Answer 1

Answer 2

\(1,2K+Cl_2-->2KCl\)

\(2,3Fe+2O_2-->Fe_3O_4\)

\(3,N_2+3H_2-->2NH_3\)

\(4,Fe_2O_3+3H_2-->2Fe+3H_2O\\ 5,2Mg+CO_2-->2MgO+C\)

Answer 3

1/ \(2K+Cl_2\rightarrow2KCl\)

 

2/  \(3Fe+2O_2\underrightarrow{t^o}Fe_3O_4\)

 

3/\(N_2+3H_2< ->2NH_3\)

 

4/\(Fe_2O_3+3H_2\underrightarrow{t^o}2Fe+3H_2O\)

 

5/ \(2Mg+CO_2\underrightarrow{t^o}2MgO+C\)

Answer 4