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The amount of chemical substance per unit volume

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\rho_m = \frac{\nu}{V}  = \frac{\rho}{M}= \frac{1}{V_m}

where

LaTeX Math Inline
bodyV_m

molar volume of a given substance

LaTeX Math Inline
bodyV

volume of a given substance

LaTeX Math Inline
body\rho

density of a given substance

LaTeX Math Inline
body\nu

amount of a given substance

LaTeX Math Inline
bodyM

molar mass of a given substance
DimensionSI unitsOil metric unitsOil field units
L-3m-3cc-1ft-1


Molar Density 

LaTeX Math Inline
body\rho_m
  is inverse to Molar volume 
LaTeX Math Inline
bodyV_m

LaTeX Math Block
anchorZFTII
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\rho_m = \frac{1}{V_m}


In case of 
fluid which satisfies Real Gas EOS @model the Molar Density 

LaTeX Math Inline
body\rho_m
 can be expressed in terms of Z-factor 
LaTeX Math Inline
bodyZ(p, T)
:

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anchor4R31X
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\rho_m = \frac{p}{ZRT}

where

LaTeX Math Inline
bodyT

temperature

LaTeX Math Inline
bodyp

pressure

LaTeX Math Inline
bodyR

gas constant


See also


Natural Science / Physics / Molecular Physics

Density ] [ Molar Mass ]