Antimony is alloyed with lead to increase the rigidity, Ask an Expert

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Antimony is alloyed with lead to increase the rigidity ofcomponents used in the construction of lead storage batteries.
2.668 g of a particular metallic alloy, compounded of only Pb andSb, can be quantitatively converted into a 3.101-g mixture of theoxides PbO2 and Sb2O4. What was the percentage (by mass) of antimony in the alloy?

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