Chemistry Practice Problems ppm Practice Problems Solution: A water sample contains the pollutant chlorobenzen...

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Solution: A water sample contains the pollutant chlorobenzene with a concentration of 16 ppb (by mass). What volume of this water contains 5.01×102 mg of chlorobenzene? (Assume a density of 1.00 g/mL.)

Problem

A water sample contains the pollutant chlorobenzene with a concentration of 16 ppb (by mass). What volume of this water contains 5.01×102 mg of chlorobenzene? (Assume a density of 1.00 g/mL.)

Solution

We will solve this problem through these steps:

  • Find grams of chlorobenzene
  • Find the mass of solution using the ppb formula
  • Find volume of solution using density


The formula for ppb is:

<math xmlns="http://www.w3.org/1998/Math/MathML"><mi>p</mi><mi>p</mi><mi>b</mi><mo>&#xA0;</mo><mo>=</mo><mo>&#xA0;</mo><mfrac><mrow><mi>g</mi><mo>&#xA0;</mo><mi>s</mi><mi>o</mi><mi>l</mi><mi>u</mi><mi>t</mi><mi>e</mi></mrow><mrow><mi>g</mi><mo>&#xA0;</mo><mi>s</mi><mi>o</mi><mi>l</mi><mi>u</mi><mi>t</mi><mi>i</mi><mi>o</mi><mi>n</mi></mrow></mfrac><mo>&#xD7;</mo><msup><mn>10</mn><mn>9</mn></msup></math>


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