What is the mass of arsenic that is contained in a 50.0 g sample if the concentration is 5 ppm?

The mass of arsenic found in the sample is 0.25 mg

Explanation:

ppm is the amount of solute (in milligrams) present in kilogram of a solvent. It is also known as parts-per million.

To calculate the ppm of oxygen in sea water, we use the equation:

Both the masses are in grams.

We are given:

Concentration of arsenic = 5 ppm

Mass of sample = 50 g

Putting values in above equation, we get:

Conversion factor used:  1 g = 1000 mg

Hence, the mass of arsenic found in the sample is 0.25 mg

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