Question

yellow metal is an alloy containing 60% copper 40% zinc by weight.calculate the no. of moles of zinc atoms in 260g of alloy?

Answer 1

1.59 moles

Step-by-step explanation:

`mass \: of \: zinc \: = 40\% \: of \: mass \: of \: alloy \\ mass \: of \: zinc = (40)/(100) * 260g = 104g \\ number \: of \: moles \: = (mass)/(molar \: mass) \\ molar \: mass \: of \: zinc \: = 65.38 \\ number \: of \: moles \: of \: zinc = (104)/(65.38) = 1.59`