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Chemistry: The Central Science | 13th Edition | ISBN: 9780321910417 | Authors: Theodore E. Brown; H. Eugene LeMay; Bruce E. Bursten; Catherine Murphy; Patrick Woodward; Matthew E. Stoltzfus
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Brass is a substitutional alloy consisting of a solution

Chapter , Problem 13.57

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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? (b) What is the molarity of Zn in the solution?

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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? (b) What is the molarity of Zn in the solution?

ANSWER:

Problem 13.57Brass is a substitutional alloy consisting of a solution of copper and zinc. A particular sample ofred brass consisting of 80.0% Cu and 20.0% Zn by mass has a density of 8750 kg/m . (a) What 3is the molality of Zn in the solid solution (b) What is the molarity of Zn in the solution Step-by-step solution Step 1 of 3 (A) Let the volume of the sample be 1L 1m = 100 cm 1m = 10 cm 3 3 3 10 cm = 1L 3 Thus 1m = 1000L mass of the sample = Density kg/L x volume (L) = 8750 kg/L x 1L 1000 = 8.750 kg

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