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A normal cubic meter (Nm 3) is the metric expression of gas volume at standard conditions and it is usually (but not always) defined as being measured at 0 °C and 1 atmosphere of pressure. A standard cubic foot (scf) is the USA expression of gas volume at standard conditions and it is often ( but not always ) defined as being measured at 60 ...
Some express the concentrations as ppmv (parts per million by volume) and some express the concentrations as mg/m 3 (milligrams per cubic meter), while others require adjusting or correcting the concentrations to reference conditions of moisture content, oxygen content or carbon dioxide content.
Its units are in parts per million (ppm) for gases and in milligrams per cubic meter (mg/m 3) for particulates such as dust, smoke and mist. The basic formula for converting between ppm and mg/m 3 for gases is ppm = (mg/m^3) * 24.45 / molecular weight. This formula is not applicable to airborne particles.
Chemical regulation is sometimes [clarification needed] expressed in parts per million (ppm), but often [clarification needed] in milligrams per cubic meter (mg/m 3). [2] Units of measure for physical agents such as noise are specific to the agent.
mg/m 3 ppm 7782-50-5: 0126: Chlorine: 29 mg/m 3: 10 ppm: 7782505: 100-44-7: 0016: Benzyl chloride (used in chemical weapons) [6] 51.8 mg/m 3: 10 ppm: 100447: 77-78-1: 0148: Dimethyl sulfate (used in chemical weapons) [7] 36.1 mg/m 3: 7 ppm: 77781, carcinogenic substance 76-06-2: 0750: Chloropicrin: 13.44 mg/m 3: 2 ppm: 76062: 75-44-5: 0007 ...
Small business owners face severe penalties if they don't report to the federal government by year's end. Thousands of businesses may not realize they are subject to a new reporting process ...
At 1 ppm the solution is a very pale yellow. As the concentration increases the colour becomes a more vibrant yellow, then orange, with the final 10,000 ppm a deep red colour. In science and engineering , the parts-per notation is a set of pseudo-units to describe small values of miscellaneous dimensionless quantities , e.g. mole fraction or ...
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