The aluminum in a 0.767 g sample of an unknown material was precipitated as aluminum hydroxide, Al(OH)3, which was then converted to Al2O3 by heating strongly. If 0.143 g of Al2O3 is obtained from the 0.767 g sample, what is the mass percent of aluminum in the sample? %

The aluminum in a 0.767 g sample of an unknown material was precipitated as aluminum hydroxide, Al(OH)3, which was then converted to Al2O3 by heating strongly. If 0.143 g of Al2O3 is obtained from the 0.767 g sample, what is the mass percent of aluminum in the sample? %

Chemistry & Chemical Reactivity

10th Edition

ISBN:9781337399074

Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Chapter4: Stoichiometry: Quantitative Information About Chemical Reactions

Section: Chapter Questions

Problem 27PS

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Question

The aluminum in a 0.767 g sample of an unknown material was
precipitated as aluminum hydroxide, Al(OH)3, which was then
converted to Al2O3 by heating strongly. If 0.143 g of Al2O3 is
obtained from the 0.767 g sample, what is the mass percent of
aluminum in the sample?
%

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