65. Solving a chemistry problem

65. Solving a chemistry problem

655. Write the reaction equations by which the following transformations can be carried out:
a) Mn → MnSO4 → H2MnO4 → MnO2 → MnCl2;
b) Mn → Mn(OH)2 → Mn(NO3)2 → HMnO4 → MnO2.

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