Brass is a substitutional alloy consisting of a solution of
coppe...

Question

Brass is a substitutional alloy consisting of a solution of
copper and zinc. A particular sample of red brass consisting of 80.0 % Cu and 20.0 % Zn by mass has a density of
8750 kg>m3. (a) What is the molality of Zn in the solid
solution?

Accepted Answer

Hi everyone here we have a question asking us to calculate the morality of 10 and a 6870 kg solid solution of bronze composed of 77% copper and 23% by mass. With the density of 8.73 kg per meters cubed. So we're starting off here with our 870 kg And we're gonna multiply that by 77g of copper Per a 100 g sample. And that gives us 0.9 kg of copper. So we have our kg sample -5289. kg of copper equals .1 kg. A 10. And now that we have our 1,580. kg of 10. We're going to multiply that by 1000 g over one kg times one mole over tens molar mass, which is .71g. And our kg are canceling out and our g are canceling out. And that gives us 13, .58883 moles of 10. So our morality Is going to equal 13,000 .5883 moles of 10, divided by 5289. kilograms of tin. Because morality is moles over kilogram And that equals 2.5 to morality. And that is our final answer. Thank you for watching. Bye

Brass is a substitutional alloy consisting of a solution of copper and zinc. A particular sample of red brass consisting of 80.0 % Cu and 20.0 % Zn by mass has a density of 8750 kg>m3. (a) What is the molality of Zn in the solid solution?

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