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QUESTION
A student is given four samples of solids: W, X, Y and Z, all of which have a metallic luster. She is told the fours solids are: gold, lead sulfide,...
A student is given four samples of solids: W, X, Y and Z, all of which have a metallic luster. She is told the fours solids are: gold, lead sulfide, mica (which is quartz, or SiO2), and iodine. The results of her investigation are:
