A 76.5 g sample of ground water is found to have a lead concentration of 12.77 ppm. Calculate the mass of lead in the sample in milligrams?

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  • Fern
    Lv 7
    7 months ago

    12.77 grams Lead /10^6 grams x 10^3 milligrams/gram = 0.01277 milligrams lead / gram

    0.01277 miilgrams lead / gram x 76.5 gram sample = 0.977 milligrams lead

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