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30 April, 12:46

The maximum contaminant level (MCL) set by the EPA of cadmium in drinking water is 0.0050 mg/L. Convert the MCL of cadmium from milligrams per liter to parts per billion (ppb).

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  1. 30 April, 13:09
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    5 ppb of Cd

    Explanation:

    Given, Concentration = 0.0050 mg/L

    To find this concentration in parts per billion

    As,

    1 mg per liter = 1 ppm

    Parts per billion is defined as the number of the units of the mass of contaminant per thousand million units of the total mass. The relation between ppm and ppb is shown below as:

    1 ppm = 1000 ppb

    Concluding as:

    1 mg per liter = 1000 ppb

    So,

    0.0050 mg/L = 1000 * 0.0050 ppb = 5 ppb of Cd
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