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A 10-cm^3 sample of an unknown liquid has a mass of 1.4 x 10^4 mg. What is the density of the liquid in g/cm^3?

April 26, 2017Education help homework liquid mass Reference sample unknown

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A 10-cm^3 sample of an unknown liquid has a mass of 1.4 x 10^4 mg. What is the density of the liquid in g/cm^3?

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Divide mass by volume to get density. (1.4 x 10^4)mg/10cm^3 is equal to 1.4 x 10^3 mg/cm^3. But your answer requires conversion to grams, so divide that answer by 1000 (conversion factor for mg to g) and you get 1.4 x 10^0 g/cm^3. Simplify 10^0 to 1, get 1.4 x 1 g/cm^3, which becomes 1.4 g/cm^3. The answer is choice C.