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A 0.250-g sample of a magnesium-aluminum alloy dissolves completely in an excess of  HCl(aq). When the liberated...

A 0.250-g sample of a magnesium-aluminum alloy dissolves completely in an excess of  HCl(aq). When the liberated H2(g)is collected over water at 29 ∘C and 752 Torr, the volume is found to be 323 mL . The vapour pressure of water at 29 ∘C is 30.0 Torr. What is the mass percentage of aluminum in this alloy?

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Answer #1

Assume mass of Al = x gram

Then, mas of Mg = (0.250-x) gram

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