57. Solving a chemistry problem
9. In what direction will electrons move in the external circuit of the following galvanic cells: a) Mg|Mg2 ||Pb2 |Pb; b) Pb|Pb2 ||Cu2 |Cu; c) Cu|Cu2 ||Ag |Ag, if all electrolyte solutions are unimolar? Which metal will dissolve in each of these cases?
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