Representations of Solutions

AP Chemistry· difficulty 2/5

"5 ppm of lead" in water means

A
$5% by mass$
B
$5 mol per liter$
C
$5 mg of lead per liter (or 5 µg per gram)$
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D
$5 g of lead per liter$

Explanation

ppm = parts per million. For dilute aqueous solutions: 1 ppm \approx 1 mg/L.

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