A 128-gram sample of copper is heated with sulfur to
A 1.28-gram sample of copper is heated with sulfur to produce 1.60 grams of a copper sulfide compund. Calculate the mass percentages of copper and sulfur in the compund.
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a 128-gram sample of copper is heated with sulfur to produce 160 grams of a copper sulfide compund calculate the mass
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A 2016 survey of undergraduate students considered this further and found that compared with students that did not use cannabis at least once
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