Molar MassThe list is arranged by kind of compound: acids, bases, salts, oxides, elements and gases, organic compounds and hydrates. Each entry shows the formula and the molar mass in grams per mole. Search by an everyday name too: "baking soda", "bleach", "fitkari" and "Epsom salt" all work, because each page records the common names of its compound.
Every figure is calculated from the IUPAC abridged atomic weights, never typed by hand, so the list, the pages and the calculator agree to the last digit. School books that use whole-number atomic masses will give answers that differ slightly; each compound page shows both.
Acids 12
- Hydrogen chloride HCl · 36.46
- Sulphuric acid H2SO4 · 98.07
- Nitric acid HNO3 · 63.01
- Phosphoric acid H3PO4 · 97.99
- Acetic acid CH3COOH · 60.05
- Carbonic acid H2CO3 · 62.02
- Hydrogen fluoride HF · 20.01
- Hydrogen bromide HBr · 80.91
- Citric acid C6H8O7 · 192.12
- Oxalic acid H2C2O4 · 90.03
- Formic acid HCOOH · 46.02
- Hydrogen sulphide H2S · 34.08
Bases and alkalis 8
- Sodium hydroxide NaOH · 40.00
- Potassium hydroxide KOH · 56.10
- Calcium hydroxide Ca(OH)2 · 74.09
- Magnesium hydroxide Mg(OH)2 · 58.32
- Ammonia NH3 · 17.03
- Aluminium hydroxide Al(OH)3 · 78.00
- Barium hydroxide Ba(OH)2 · 171.34
- Ammonium hydroxide NH4OH · 35.05
Salts 46
- Sodium chloride NaCl · 58.44
- Potassium chloride KCl · 74.55
- Calcium carbonate CaCO3 · 100.09
- Sodium carbonate Na2CO3 · 105.99
- Sodium hydrogencarbonate NaHCO3 · 84.01
- Copper(II) sulphate CuSO4 · 159.60
- Silver nitrate AgNO3 · 169.87
- Potassium permanganate KMnO4 · 158.03
- Potassium dichromate K2Cr2O7 · 294.18
- Ammonium chloride NH4Cl · 53.49
- Ammonium nitrate NH4NO3 · 80.04
- Ammonium sulphate (NH4)2SO4 · 132.13
- Calcium chloride CaCl2 · 110.98
- Magnesium chloride MgCl2 · 95.21
- Magnesium sulphate MgSO4 · 120.36
- Sodium sulphate Na2SO4 · 142.04
- Potassium nitrate KNO3 · 101.10
- Sodium nitrate NaNO3 · 84.99
- Barium sulphate BaSO4 · 233.39
- Silver chloride AgCl · 143.32
- Lead(II) sulphate PbSO4 · 303.26
- Lead(II) nitrate Pb(NO3)2 · 331.21
- Iron(II) sulphate FeSO4 · 151.90
- Iron(III) chloride FeCl3 · 162.19
- Zinc sulphate ZnSO4 · 161.44
- Zinc chloride ZnCl2 · 136.28
- Aluminium sulphate Al2(SO4)3 · 342.13
- Aluminium chloride AlCl3 · 133.33
- Sodium phosphate Na3PO4 · 163.94
- Calcium phosphate Ca3(PO4)2 · 310.17
- Calcium sulphate CaSO4 · 136.13
- Potassium iodide KI · 166.00
- Potassium bromide KBr · 119.00
- Sodium fluoride NaF · 41.99
- Sodium thiosulphate Na2S2O3 · 158.10
- Sodium hypochlorite NaClO · 74.44
- Potassium chlorate KClO3 · 122.55
- Calcium carbide CaC2 · 64.10
- Sodium nitrite NaNO2 · 69.00
- Potassium sulphate K2SO4 · 174.25
- Potassium carbonate K2CO3 · 138.20
- Copper(II) chloride CuCl2 · 134.45
- Mercury(II) chloride HgCl2 · 271.49
- Lead(II) iodide PbI2 · 461.00
- Iron(III) sulphate Fe2(SO4)3 · 399.86
- Calcium fluoride CaF2 · 78.07
Oxides 22
- Water H2O · 18.02
- Carbon dioxide CO2 · 44.01
- Carbon monoxide CO · 28.01
- Sulphur dioxide SO2 · 64.06
- Sulphur trioxide SO3 · 80.06
- Nitrogen dioxide NO2 · 46.01
- Nitrogen monoxide NO · 30.01
- Dinitrogen monoxide N2O · 44.01
- Calcium oxide CaO · 56.08
- Magnesium oxide MgO · 40.30
- Iron(III) oxide Fe2O3 · 159.69
- Iron(II,III) oxide Fe3O4 · 231.53
- Aluminium oxide Al2O3 · 101.96
- Silicon dioxide SiO2 · 60.08
- Copper(II) oxide CuO · 79.55
- Zinc oxide ZnO · 81.38
- Manganese(IV) oxide MnO2 · 86.94
- Hydrogen peroxide H2O2 · 34.01
- Sodium oxide Na2O · 61.98
- Phosphorus pentoxide P2O5 · 141.94
- Titanium dioxide TiO2 · 79.86
- Lead(II) oxide PbO · 223.20
Elements and common gases 10
- Oxygen O2 · 32.00
- Nitrogen N2 · 28.01
- Hydrogen H2 · 2.02
- Chlorine Cl2 · 70.90
- Ozone O3 · 48.00
- Helium He · 4.00
- Methane CH4 · 16.04
- Bromine Br2 · 159.81
- Iodine I2 · 253.80
- Argon Ar · 39.95
Organic compounds 25
- Glucose C6H12O6 · 180.16
- Sucrose C12H22O11 · 342.30
- Ethanol C2H5OH · 46.07
- Methanol CH3OH · 32.04
- Ethane C2H6 · 30.07
- Propane C3H8 · 44.10
- Butane C4H10 · 58.12
- Ethene C2H4 · 28.05
- Ethyne C2H2 · 26.04
- Benzene C6H6 · 78.11
- Octane C8H18 · 114.23
- Acetone CH3COCH3 · 58.08
- Urea CO(NH2)2 · 60.06
- Chloroform CHCl3 · 119.37
- Carbon tetrachloride CCl4 · 153.81
- Phenol C6H5OH · 94.11
- Benzoic acid C6H5COOH · 122.12
- Aspirin C9H8O4 · 180.16
- Caffeine C8H10N4O2 · 194.19
- Glycerol C3H8O3 · 92.09
- Propanoic acid C2H5COOH · 74.08
- Aniline C6H5NH2 · 93.13
- Formaldehyde HCHO · 30.03
- Naphthalene C10H8 · 128.17
- Lactic acid C3H6O3 · 90.08
Hydrates 12
- Copper(II) sulphate pentahydrate CuSO4·5H2O · 249.68
- Sodium carbonate decahydrate Na2CO3·10H2O · 286.14
- Magnesium sulphate heptahydrate MgSO4·7H2O · 246.47
- Iron(II) sulphate heptahydrate FeSO4·7H2O · 278.01
- Calcium sulphate dihydrate CaSO4·2H2O · 172.16
- Sodium thiosulphate pentahydrate Na2S2O3·5H2O · 248.17
- Oxalic acid dihydrate H2C2O4·2H2O · 126.06
- Zinc sulphate heptahydrate ZnSO4·7H2O · 287.54
- Ammonium iron(II) sulphate hexahydrate FeSO4·(NH4)2SO4·6H2O · 392.12
- Potassium aluminium sulphate dodecahydrate KAl(SO4)2·12H2O · 474.37
- Barium chloride dihydrate BaCl2·2H2O · 244.26
- Calcium chloride dihydrate CaCl2·2H2O · 147.01
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