Viết PTHH chuyển hóa sau:
a/ H\(_2\) \(\underrightarrow{\left(1\right)}\) H\(_2\)O \(\underrightarrow{\left(3\right)}\) O\(_2\) \(\underrightarrow{\left(1\right)}\) ZnO
b/ KMnO\(_4\) \(\underrightarrow{\left(3\right)}\) O\(_2\) \(\underrightarrow{\left(1\right)}\) CuO \(\underrightarrow{\left(3\right)}\) Cu
a) 2H2 + O2 ---t0 --> 2H2O
2H2O --- đp ---> 2H2 + O2
2Zn + O2 --- t0 ---> 2 ZnO
b) 2KMnO4 ---t0 --> K2MnO4 +MnO2 +O2
2Cu + O2 --- t0--> 2CuO
CuO + H2 -- t0--> Cu + H2O
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