Indoor Air Unit Conversion Background - US EPA
benzene (which has a molecular weight of 78.11 g/mole) occupies the following volume: = 3.866 x 10-5 L or 0.03866 mL. Dividing this by the sample volume in m. 3(=1 3 m ) gives us our result in ppmV: 123.45 µg/m. ... Here are some other useful conversions: ppmV x 1,000 = ppbV .
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