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  2. Equivalent concentration - Wikipedia

    en.wikipedia.org/wiki/Equivalent_concentration

    Normality is defined as the number of gram or mole equivalents of solute present in one liter of solution.The SI unit of normality is equivalents per liter (Eq/L). = where N is normality, m sol is the mass of solute in grams, EW sol is the equivalent weight of solute, and V soln is the volume of the entire solution in liters.

  3. Useful conversions and formulas for air dispersion modeling

    en.wikipedia.org/wiki/Useful_conversions_and...

    The conversion equations depend on the temperature at which the conversion is wanted (usually about 20 to 25 degrees Celsius). At an ambient air pressure of 1 atmosphere (101.325 kPa), the general equation is: = / ()

  4. Maximum contaminant level - Wikipedia

    en.wikipedia.org/wiki/Maximum_Contaminant_Level

    The legally enforced MCL is then set as close as possible to the MCLG. The MCL for a contaminant may be higher than the MCLG because of difficulties in measuring small quantities of a contaminant, a lack of available treatment technologies , or if EPA determines that the costs of treatment would outweigh the public health benefits of a lower MCL.

  5. Osmotic concentration - Wikipedia

    en.wikipedia.org/wiki/Osmotic_concentration

    Osmotic concentration, formerly known as osmolarity, [1] is the measure of solute concentration, defined as the number of osmoles (Osm) of solute per litre (L) of solution (osmol/L or Osm/L). The osmolarity of a solution is usually expressed as Osm/L (pronounced "osmolar"), in the same way that the molarity of a solution is expressed as "M ...

  6. Heat of combustion - Wikipedia

    en.wikipedia.org/wiki/Heat_of_combustion

    Since the heat of combustion of these elements is known, the heating value can be calculated using Dulong's Formula: HHV [kJ/g]= 33.87m C + 122.3(m H - m O ÷ 8) + 9.4m S. where m C, m H, m O, m N, and m S are the contents of carbon, hydrogen, oxygen, nitrogen, and sulfur on any (wet, dry or ash free) basis, respectively. [8]

  7. Nearly 30% of US drugstores closed in one decade, study shows

    www.aol.com/nearly-30-us-drugstores-closed...

    Black and Latino neighborhoods were most vulnerable to the retail pharmacy closures, which can chip away at already-limited care options in those communities, researchers said in a study published ...

  8. Could bird flu strain the US public health system as seasonal ...

    www.aol.com/could-bird-flu-strain-us-100256645.html

    As seasonal influenza ramps up, and with bird flu continuing to circulate, some public health experts are worried there may be a strain on the public health system. Since the bird flu outbreak ...

  9. Molar volume - Wikipedia

    en.wikipedia.org/wiki/Molar_volume

    The ideal gas equation can be rearranged to give an expression for the molar volume of an ideal gas: = = Hence, for a given temperature and pressure, the molar volume is the same for all ideal gases and is based on the gas constant: R = 8.314 462 618 153 24 m 3 ⋅Pa⋅K −1 ⋅mol −1, or about 8.205 736 608 095 96 × 10 −5 m 3 ⋅atm⋅K ...