Calculate number of moles of Cu&S from 39.62% copper and 20.13% of sulphur(Cu=63,S=32)
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%of Cu=39.62
%of Cu=mass of Cu/molar mass of Cu × 100
39.62=x/63 ×100
x =39.62×63/100
x=24.96 approx = 25
now, this is weight of Cu
now ,no.of moles of copper= W /MW
= 25/63
=0.397approx= 0.4
in the same way we can first find the weight of sulphur which comes to as 6.4,then no of moles by substituting weight and molecular weight in formula which comes to as 0.2 moles.
I hope this helped you!
%of Cu=mass of Cu/molar mass of Cu × 100
39.62=x/63 ×100
x =39.62×63/100
x=24.96 approx = 25
now, this is weight of Cu
now ,no.of moles of copper= W /MW
= 25/63
=0.397approx= 0.4
in the same way we can first find the weight of sulphur which comes to as 6.4,then no of moles by substituting weight and molecular weight in formula which comes to as 0.2 moles.
I hope this helped you!
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