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Chemistry / Principles of General Chemistry 2 / Chapter 4 / Problem 86P

Principles of General Chemistry | 2nd Edition | ISBN: 9780073511085 | Authors: Martin S. Silberberg

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QUESTION: Problem 86P

There are various methods for finding the composition of an alloy (a metal-like mixture). Show that calculating the mass % of Mg in a magnesium-aluminum alloy (d = 2.40 g/cm3) gives the same answer (within rounding) using each of these methods:

(a) a 0.263-g sample of alloy (d of Mg = 1.74 g/cm3;d of A1 = 2.70 g/cm3); (b) an identical sample reacting with excess aqueous HC1 forms 1.38 × 10–2 mol of H2; (c) an identical sample reacting with excess O2 forms 0.483 g of oxide.

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QUESTION: Problem 86P

There are various methods for finding the composition of an alloy (a metal-like mixture). Show that calculating the mass % of Mg in a magnesium-aluminum alloy (d = 2.40 g/cm3) gives the same answer (within rounding) using each of these methods:

(a) a 0.263-g sample of alloy (d of Mg = 1.74 g/cm3;d of A1 = 2.70 g/cm3); (b) an identical sample reacting with excess aqueous HC1 forms 1.38 × 10–2 mol of H2; (c) an identical sample reacting with excess O2 forms 0.483 g of oxide.

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