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141. Solving a chemistry problem

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5. A sample of a nonferrous alloy weighing m g was dissolved and by electrolysis at a constant current intensity I during time t, copper was completely isolated at the cathode and lead in the form of PbO2 at the anode.
Determine the mass fraction (%) of copper and lead in the alloy, if the current efficiency was 100% -
Option 1
m, g. 1.525
I, A. 0.200
t, min 45.0
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