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List of orders of magnitude for molar concentration; Factor (Molarity) SI prefix Value Item 10 −24: yM 1.66 yM: 1 elementary entity per litre [1]: 8.5 yM: airborne bacteria in the upper troposphere (5100/m 3) [2]
mmol millimole 10 3 mol kmol kilomole 10 −6 mol μmol micromole 10 6 mol Mmol megamole 10 −9 mol nmol nanomole 10 9 mol Gmol gigamole 10 −12 mol pmol picomole 10 12 mol Tmol teramole 10 −15 mol fmol femtomole 10 15 mol Pmol petamole 10 −18 mol amol attomole 10 18 mol Emol examole 10 −21 mol zmol zeptomole 10 21 mol Zmol zettamole
Molar concentration or molarity is most commonly expressed in units of moles of solute per litre of solution. [1] For use in broader applications, it is defined as amount of substance of solute per unit volume of solution, or per unit volume available to the species, represented by lowercase : [2]
The enzyme unit, or international unit for enzyme (symbol U, sometimes also IU) is a unit of enzyme's catalytic activity. [1]1 U (μmol/min) is defined as the amount of the enzyme that catalyzes the conversion of one micro mole of substrate per minute under the specified conditions of the assay method.
The rate of a reaction is the concentration of substrate disappearing (or product produced) per unit time (mol L −1 s −1).. The % purity is 100% × (specific activity of enzyme sample / specific activity of pure enzyme).
A certain amount of univalent ions provides the same amount of equivalents while the same amount of divalent ions provides twice the amount of equivalents. For example, 1 mmol (0.001 mol) of Na + is equal to 1 meq, while 1 mmol of Ca 2+ is equal to 2 meq.
However, there is another cluster containing many metabolic substances like cholesterol and glucose at the limit with the blue part (g/L or mmol/L). [ citation needed ] The unit conversions of substance concentrations from the molar to the mass concentration scale above are made as follows:
The following table lists the Van der Waals constants (from the Van der Waals equation) for a number of common gases and volatile liquids. [ 1 ] To convert from L 2 b a r / m o l 2 {\displaystyle \mathrm {L^{2}bar/mol^{2}} } to L 2 k P a / m o l 2 {\displaystyle \mathrm {L^{2}kPa/mol^{2}} } , multiply by 100.