28.7.Solve:(a)Each gold atom has one conduction electron. Using Avogadro’s number and nas the number ofmoles, the number of atoms isNnNmMNVMNrLMN====()AAAAAAAρρπ2The density of gold is =19,300 kg/m3, the atomic mass is MA=197 g mol−1, r=0.5 ×10−3m, L=0.1 m, and NA=6.02 ×1023mol−1. Substituting these values, we get N=4.63 ×1021electrons.(b)If all the electrons are transferred a charge of (4.63
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