Câu hỏi của Thành

Question

Hoàn thành phương trình hóa học:

1: Mg + O2 --> MgO

2  Fe + O2 --> Fe3O4

3: Zn + HCl --> ZnCl2 + H2

4: C + O2 --> CO2

5: KMnO4 --> K2MnO4 + MnO2 + O2

6: Ca(OH)2 + CO2 --> CaCO3 + H2O

7: Na + H2...

B.Thị Anh Thơ · Accepted Answer

$2Mg+O_2\rightarrow2MgO$

$3Fe+2O_2\rightarrow Fe_3O_4$

$Zn+2HCl\rightarrow ZnCl_2+H_2\uparrow$

$C+O_2\rightarrow CO_2\uparrow$

$2KMnO_4\rightarrow K_2MnO_4+MnO_2+O_2\uparrow$

$Ca\left(OH\right)_2+CO_2\rightarrow CaCO_3\downarrow+H_2O$

$2Na+2H_2O\rightarrow2NaOH+H_2\uparrow$

$2Cu+O_2\rightarrow2CuO$Câu trả lời: $2Mg+O_2\rightarrow2MgO$

$3Fe+2O_2\rightarrow Fe_3O_4$

$Zn+2HCl\rightarrow ZnCl_2+H_2\uparrow$

$C+O_2\rightarrow CO_2\uparrow$

$2KMnO_4\rightarrow K_2MnO_4+MnO_2+O_2\uparrow$

$Ca\left(OH\right)_2+CO_2\rightarrow CaCO_3\downarrow+H_2O$

$2Na+2H_2O\rightarrow2NaOH+H_2\uparrow$

$2Cu+O_2\rightarrow2CuO$

nguyễn thị phong lam · Answer

1) 2Mg  +  O2  ->  2MgO

2)  3Fe  +  2O2  ->  Fe3O4

3)  Zn  +  2HCl  -> ZnCl2  +  H2

5)  2KMnO4  ->  K2MnO4  +  MnO2  + O2

7)  2Na  +  2H2O  ->  2NaOH  +  H2Câu trả lời: 1) 2Mg  +  O2  ->  2MgO

2)  3Fe  +  2O2  ->  Fe3O4

3)  Zn  +  2HCl  -> ZnCl2  +  H2

5)  2KMnO4  ->  K2MnO4  +  MnO2  + O2

7)  2Na  +  2H2O  ->  2NaOH  +  H2

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