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Table of molar mass of substances
Tables show molar mass of various chemical compounds.

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liquids

SubstanceMolecular formulaMolar mass [g/mol]
acetone(CH3)2CO58.08
glycerinC3H5(OH)392.1
ethanolC2H5OH46.07
mercuryHg200.6
methanolCH3OH32.04
acetate acidCH3COOH60.05
benzeneC6H678.12
chloroformCHCl3119.4
tetrachloromethaneCCl4153.8
diethyl ethere(C2H5)2O74.12
hexafluoronenzeneC6F6186.06

alcohols

SubstanceMolecular formulaMolar mass [g/mol]
ethanolC2H5OH46.07
methanolCH3OH32.04

other inorganic

SubstanceMolecular formulaMolar mass [g/mol]
ammoniaNH317.03
phosphinePH334
argonAr39.35
nitrogenN228.01
heliumHe4.003
kryptonKr83.8
xenonXe131.3
neonNe20.18
ozoneO347.998

gases

SubstanceMolecular formulaMolar mass [g/mol]
ammoniaNH317.03
methaneCH416.04
carbon dioxideCO244.01
hydrogen chlorideHCl36.46
hydrogen jodideHI127.91
hydrogen sulfurideH2S34.08
ethene (ethylene)C2H428.05
nitrogen (II) oxideNO30.01
phosphinePH334
sulfur (IV) oxideSO264.06
chlorineCl270.91
hydrogenH22.016
oxygenO231.999
steamH2O18.016
vinyl chloride (chloroethene)CH2CHCl64.51
nitrogenN228.01
fluorineF238
heliumHe4.003
kryptonKr83.8
xenonXe131.3
neonNe20.18
ozoneO347.998

hydrocarbons

SubstanceMolecular formulaMolar mass [g/mol]
methaneCH416.04
ethene (ethylene)C2H428.05
benzeneC6H678.12

oxides

SubstanceMolecular formulaMolar mass [g/mol]
carbon dioxideCO244.01
carbon monoxideCO28.01
nitrogen (II) oxideNO30.01
sulfur (IV) oxideSO264.06

hydrides

SubstanceMolecular formulaMolar mass [g/mol]
arsenic hydrideAsH377.95

inorganic acids

SubstanceMolecular formulaMolar mass [g/mol]
hydrogen bromideHBr80.92
hydrogen chlorideHCl36.46
hydrogen jodideHI127.91
hydrogen sulfurideH2S34.08
sulfurous (VI) acidH2SO498.08

carboxylic acids

SubstanceMolecular formulaMolar mass [g/mol]
acetate acidCH3COOH60.05

other organic

SubstanceMolecular formulaMolar mass [g/mol]
chloroformCHCl3119.4
tetrachloromethaneCCl4153.8
diethyl ethere(C2H5)2O74.12
vinyl chloride (chloroethene)CH2CHCl64.51
hexafluoronenzeneC6F6186.06

halogens

SubstanceMolecular formulaMolar mass [g/mol]
chlorineCl270.91
fluorineF238

Some facts

  • The molar mass is simply the mass of one mole of substance, i.e. the mass of the sample containing about 6,023×1023 6,023 \times 10 ^ {23} atoms or molecules (→ see Avogadro number).
  • The unit of molar mass in the SI system is kilogram per mole:
    kgmol\frac{kg}{mol}
  • However, in practice more often the molar mass is given in grams per mole (g/mol).
  • The molar mass only makes sense for pure substances, i.e. it doesn't make sense for mixtures.
  • The molar mass is specific for a given chemical substance. It results directly from the masses of atoms contained in the molecule.
  • Knowledge of molar masses is useful in all kinds of stoichiometric calculations e.g. when converting molar concentration into percentages or determining the mass of substrates needed to perform the reaction.

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