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

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metals#

SubstanceMolecular formulaMolar mass
[g / mol]
aluminum (pure)Al26.98153843
ironFe55.8452

liquids#

SubstanceMolecular formulaMolar mass
[g / mol]
acetone(CH3)2CO58.08
glycerinC3H5(OH)392.1
ethanolC2H5OH46.07
liquid hydrogenH22.01588
liquid nitrogenN228.0134
mercuryHg200.6
water 0°CH2O18.01528
water 4°CH2O18.01528
water 20°CH2O18.01528
water 25°CH2O18.01528
n-hexaneC6H1486.18
methanolCH3OH32.04
acetate acidCH3COOH60.05
benzeneC6H678.12
chloroformCHCl3119.4
tetrachloromethaneCCl4153.8
diethyl ethere(C2H5)2O74.12
n-pentaneC5H1272.15
n-heptaneC7H16100.21
n-octaneC8H18114.23
n-nonaneC9H20128.2
n-decaneC10H22142.29
undecaneC11H24156.31
dodecaneC12H26170.33
tridecaneC13H28184.37
tetradecaneC14H30198.39
hexadecaneC16H34226.41
propan-2-ol (isopropyl alcohol)C3H7OH60.1
hexafluoronenzeneC6F6186.06

alcohols#

SubstanceMolecular formulaMolar mass
[g / mol]
ethanolC2H5OH46.07
methanolCH3OH32.04
propan-2-ol (isopropyl alcohol)C3H7OH60.1

other materials#

SubstanceMolecular formulaMolar mass
[g / mol]
ice (frozen water, 0°C)H2O18.01528

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
hydrogenH22.01588
methaneCH416.04
nitrogenN228.0134
carbon dioxideCO244.01
hydrogen chlorideHCl36.46
hydrogen jodideHI127.91
hydrogen sulfurideH2S34.08
propaneC3H844.1
n-buthaneC4H1058.12
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
n-hexaneC6H1486.18
propaneC3H844.1
n-buthaneC4H1058.12
ethene (ethylene)C2H428.05
benzeneC6H678.12
n-pentaneC5H1272.15
n-heptaneC7H16100.21
n-octaneC8H18114.23
n-nonaneC9H20128.2
n-decaneC10H22142.29
undecaneC11H24156.31
dodecaneC12H26170.33
tridecaneC13H28184.37
tetradecaneC14H30198.39
hexadecaneC16H34226.41
octadecaneC18H38254.5
isocane (eicosane)C20H42282.5475
naphthaleneC10H8128.1705

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

solids#

SubstanceMolecular formulaMolar mass
[g / mol]
octadecaneC18H38254.5
isocane (eicosane)C20H42282.5475
naphthaleneC10H8128.1705

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\dfrac{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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