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  2. Useful conversions and formulas for air dispersion modeling

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

    Atmospheric pollutant concentrations expressed as mass per unit volume of atmospheric air (e.g., mg/m 3, μg/m 3, etc.) at sea level will decrease with increasing altitude because the atmospheric pressure decreases with increasing altitude.

  3. Template:Convert/list of units - Wikipedia

    en.wikipedia.org/wiki/Template:Convert/list_of_units

    The table below lists units supported by {{convert}}. More complete lists are linked for each dimension. For a complete list of all dimensions, ... mg gr; microgram:

  4. Template:Convert/list of units/mass - Wikipedia

    en.wikipedia.org/wiki/Template:Convert/list_of...

    Mass; system unit unit-code symbol or abbrev. notes sample default conversion combinations SI: kilogram: kg kg 1.0 kg (2.2 lb) kg lb. kg lb st; kg st. kg st lb; gram: g g

  5. List of conversion factors - Wikipedia

    en.wikipedia.org/wiki/List_of_conversion_factors

    ≡ 3 + 1 ⁄ 6 gr = 205.196 548 3 mg carat (metric) ct ≡ 200 mg = 200 mg clove: ≡ 8 lb av = 3.628 738 96 kg: crith: ≡ mass of 1 L of hydrogen gas at STP: ≈ 89.9349 mg dalton: Da 1/12 the mass of an unbound neutral atom of carbon-12 in its nuclear and electronic ground state and at rest: ≈ 1.660 539 068 92 (52) × 10 −27 kg ‍ [20 ...

  6. Grain (unit) - Wikipedia

    en.wikipedia.org/wiki/Grain_(unit)

    C-13 The unit formerly used by jewellers to measure pearls, diamonds, and other precious stones, called the jeweller's grain or pearl grain, is equal to 1 ⁄ 4 carat (50 mg; 0.77 gr). [5] The grain was also the name of a traditional French unit equal to 53.115 mg. [5]

  7. Orders of magnitude (mass) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude_(mass)

    The tonne (t) is an SI-compatible unit of mass equal to a megagram (Mg), or 10 3 kg. The unit is in common use for masses above about 10 3 kg and is often used with SI prefixes. For example, a gigagram ( Gg ) or 10 9 g is 10 3 tonnes, commonly called a kilotonne .

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  9. Equivalent weight - Wikipedia

    en.wikipedia.org/wiki/Equivalent_weight

    In chemistry, equivalent weight (also known as gram equivalent [1] or equivalent mass) is the mass of one equivalent, that is the mass of a given substance which will combine with or displace a fixed quantity of another substance.