For an alloy that consists of 35 at% Zn and 65 at% Cu, what are the concentrations (a) of Zn (in weight percent), and (b) of Cu (in weight percent)?
Solution:
Given that 35%Zn and 65% Cu
consider total alloy=100
then 35moles of Zn and 65moles of Cu
weight of 1mole of Zn=65.3g
weight of 35moles=65.3*35=2285.5g
weight of Cu=63.5g
weight of 65 moles = 65*63.5=4127.5g
total weight Zn + Cu=4127.5+2285.5g
=6413g
Zn weight percent =(2285.5/6413)*100
=35.65%
Cu weight percent=4127.5/6413)*100=64.35%
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