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The equivalent (symbol: eq or Eq), sometimes termed the molar equivalent, is a unit of amount of substance used in chemistry and the biological sciences.
The equivalent is formally defined as the amount of a substance which will either:
The mass of one equivalent of a substance is called its equivalent weight.
A historical definition, used especially for the chemical elements, describes an equivalent as the amount of a substance that will react with one gram of hydrogen, or with eight grams of oxygen, or with 35.5 grams (1.25 oz) of chlorine, or displaces any of the three.
In practice, the amount of a substance in equivalents often has a very small magnitude, so it is frequently described in terms of milliequivalents (mEq or meq), the prefix milli denoting that the measure is divided by 1000. Very often, the measure is used in terms of milliequivalents of solute per litre of solvent (or milliNormal, where mEq/L = mN). This is especially common for measurement of compounds in…
High-End Computing Terascale Resource–can handle 63 trillion calculations per second, which is the equivalent processing power of 12,000 desktop systems…