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To identify a liquid substance, a student determined its density. Using a graduated cylinder, she measured out a 45-mL sample of the substance. She then measured the mass of the sample, find ing that it weighed 38.5 g. She knew that the substance had to be either isopropyl alcohol (density 0. 785 g/ mL) or toluene ( density 0.866g/ mL). What are the calculated density and the probable identity of the substance?
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