(a) Classify each of the following as a pure substance, a solution, or a heterogeneous mixture: a...

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(a) Classify each of the following as a pure substance, a solution, or a heterogeneous mixture: a gold coin, a cup of coffee, a wood plank.
(b) What ambiguities are there in answering part (a) from the descriptions given?
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Chemistry The Central Science

ISBN: 978-0321696724

12th edition

Authors: Theodore Brown, Eugene LeMay, Bruce Bursten, Catherine Murphy, Patrick Woodward

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