Molar mass of 465 common chemical compounds
Molecular weight of compounds including sulfuric acid, methane, hydroxide, acetate...
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1. Interactive Molar Mass & Chemical Formula Calculator
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Supports elements, digits, and parentheses. Case-sensitive (e.g. Co vs CO).
Calculation Summary
Calculated Chemical Formula:
CH₄
Molar Mass / Molecular Weight:
16.043 g/mol
Stoichiometric Conversion Result:
--
The molar mass of a substance (often conventionally referred to as molecular mass or molecular weight, though subtle scientific differences exist) constitutes the absolute mass of one mole of that substance. It is expressed standardly in \(\text{g/mol}\) (or equivalents like \(\text{kg/kmol}\)).
The molar mass is calculated mathematically by finding the sum of the individual atomic weights of every constituent element multiplied by its empirical stoichiometric index:
\[ M = \sum (n_i \cdot M_i) \]
As a baseline example, consider Methane (\(\text{CH}_4\)):
\[ \text{M}_{\text{CH}_4} = 1 \cdot \text{M}_{\text{C}} + 4 \cdot \text{M}_{\text{H}} \]
\[ \text{M}_{\text{CH}_4} = 1 \cdot 12.011\text{ g/mol} + 4 \cdot 1.008\text{ g/mol} = 16.043\text{ g/mol} \]
Please find below our verified reference table of common compounds and their molecular weights. Values have been compiled from reliable IUPAC and thermodynamic databases. You may use the built-in search filters or typical Ctrl+F browser commands to locate specific chemical families.
💡 Plant Engineering Molar Mass Guidelines
- Standard Air Average Weight: For sizing compressors and calculating pipeline pressure drops, standard dry air molecular weight is assumed as 28.966 g/mol.
- Ideal Gas Calculations: Ensure units consistency. Standard gas constant \(R = 8.314\text{ J/(mol}\cdot\text{K)}\) maps to pressure in \(\text{Pa}\) and volume in \(\text{m}^3\). Molar mass converts mass rates directly to volumetric flow rates at actual conditions.
- Compressibility Warning: Real-gas behavior diverges significantly from ideal gas behavior near saturation lines. Always apply compressibility factors (\(Z\)) when computing the actual physical density (\(\rho\)) of high-pressure process gases.
Molecular weight of compounds : from Acetaldehyde to calcium chloride
| Compound name | Chemical formula | Molecular weight (g/mol) |
| Acetaldehyde | C2H4O | 44.053 |
| Acetamide | C2H5NO | 59.068 |
| Acetate | CH3COO– | 59.044 g/mol |
| Acetic acid | CH3COOH | 60.052 |
| Acetone | C3H6O | 58.08 |
| Acetonitrile | C2H3N | 41.053 |
| Acetylene | C2H2 | 26.038 g/mol |
| Acetylene, C2H2 | 26.038 | |
| Air | 28.966 | |
| Aluminium chloride | AlCl3 | 133.33 |
| Aluminium hydroxide | Al(OH)3 | 78.00 g/mol |
| Aluminium nitrate | Al(NO3)3 | 212.994 |
| Aluminium sulfate | Al2(SO4)3 | 342.132 |
| Aluminium Sulfate | Al2(SO4)3 | 342.15 g/mol |
| Aluminum | Al | 26.982 g/mol |
| Aluminum bromide | AlBr3 | 266.69 g/mol |
| Aluminum fluoride | AlF3 | 83.9767 g/mol |
| Aluminum oxide | Al2O3 | 101.96 g/mol |
| Aluminum phosphate | AlPO4 | 121.951 g/mol |
| Aluminum sulfide | Al2S3 | 150.158 g/mol |
| Ammonia | NH3 | 17.031 |
| Ammonia (R-717) | 17.02 | |
| Ammonium acetate | CH3COONH4 | 77.083 |
| Ammonium bicarbonate | NH4HCO3 | 96.086 g/mol |
| Ammonium bromide | NH4Br | 97.943 g/mol |
| Ammonium carbonate | (NH4)2CO3 | 96.086 |
| Ammonium chloride | NH4Cl | 53.49 |
| Ammonium dichromate | (NH4)2Cr2O7 | 252.063 |
| Ammonium hydroxide | NH4OH | 35.046 |
| Ammonium iodide | NH4I | 144.94 g/mol |
| Ammonium nitrate | NH4NO3 | 80.043 |
| Ammonium nitrite | NH4NO2 | 64.06 g/mol |
| Ammonium oxalate | (NH4)2C2O4 | 124.096 |
| Ammonium oxide | (NH4)2O | 52.0763 g/mol |
| Ammonium persulfate | (NH4)2S2O8 | 228.18 g/mol |
| Ammonium phosphate | (NH4)3PO4 | 132.056 g/mol |
| Ammonium sulfate | (NH4)2SO4 | 132.13 |
| Antimony(III) chloride | SbCl3 | 228.11 |
| Antimony(V) chloride | SbCl5 | 299.01 |
| Argon gas | Ar | 39.948 g/mol |
| Argon, Ar | 39.948 | |
| Arsine | AsH3 | 77.945 |
| Ascorbic acid | C6H8O6 | 176.12 g/mol |
| Barium bromide | BaBr2 | 297.14 g/mol |
| Barium carbonate | BaCO3 | 197.34 g/mol |
| Barium chloride | BaCl2 | 208.23 |
| Barium fluoride | BaF2 | 175.34 g/mol |
| Barium hydroxide | Ba(OH)2 | 171.34 |
| Barium iodide | BaI2 | 391.136 g/mol |
| Barium nitrate | Ba(NO3)2 | 261.34 |
| Barium oxide | BaO | 153.326 g/mol |
| Barium sulfate | BaSO4 | 233.38 g/mol |
| Benzene | 78.114 | |
| Benzoic acid | C7H6O2 | 122.12 g/mol |
| Bicarbonate | CHO3– | 61.016 g/mol |
| Bismuth(III) chloride | BiCl3 | 315.33 |
| Bismuth(III) nitrate | Bi(NO3)3 | 394.99 |
| Bleach | NaClO | 74.439 g/mol |
| Boric acid | H3BO3 | 61.83 g/mol |
| Bromate | BrO3– | 127.901 g/mol |
| Bromine | Br2 | 159.808 |
| Bromothymol Blue | C27H28Br2O5S | 624.384 g/mol |
| Butadiene | 54.092 | |
| Butan-1-ol | C4H10O | 74.123 |
| Butane | C4H10 | 58.12 g/mol |
| Butanoic acid | C4H8O2 | 88.11 g/mol |
| Butene | 56.108 | |
| Butylene | 56.06 | |
| Butyric acid | C4H8O2 | 88.106 |
| Cadmium nitrate | Cd(NO3)2 | 236.42 |
| Cadmium sulfate | CdSO4 | 208.47 |
| Calcium acetate | C4H6O4Ca | 158.17 g/mol |
| Calcium Carbide | CaC2 | 64.099 g/mol |
| Calcium carbonate | CaCO3 | 100.086 g/mol |
| Calcium chloride | CaCl2 | 110.98 |
Molecular weight of compounds : from Calcium chloride to Ethylpentane
| Compound name | Chemical formula | Molecular weight (g/mol) |
| Calcium Chloride | CaCl2 | 110.98 g/mol |
| Calcium hydride | CaH2 | 42.094 g/mol |
| Calcium hydroxide | Ca(OH)2 | 74.092 |
| Calcium iodide | CaI2 | 293.887 g/mol |
| Calcium nitrate | Ca(NO3)2 | 164.086 |
| Calcium oxide | CaO | 56.0774 g/mol |
| Calcium phosphate | Ca3(PO4)2 | 310.18 g/mol |
| Calcium sulfate | CaSO4 | 136.13 |
| Carbon Dioxide, CO2 | 44.01 | |
| Carbon disulfide | CS2 | 76.13 |
| Carbon Disulfide | CS2 | 76.13 g/mol |
| Carbon Disulphide | 76.13 | |
| Carbon monoxide | CO | 28.01 |
| Carbon Monoxide, CO | 28.011 | |
| Carbon tetrachloride | CCl4 | 153.822 |
| Carbonic acid | H2CO3 | 62.024 g/mol |
| Cellulose | (C6H10O5)n | 162.1406 g/mol |
| Chlorine | 70.906 | |
| Chlorine dioxide | ClO2 | 67.452 |
| Chlorine gas | Cl2 | 70.9 g/mol |
| Chlorine Trifluoride | ClF3 | 92.448 g/mol |
| Chloroacetic acid | C2H3ClO2 | 94.49 |
| Chloroauric acid | HAuCl4 | 339.78 |
| Chloroform | CHCl3 | 119.37 |
| Chloroplatinic acid | H2PtCl6 | 409.8 |
| Chromate | CrO42- | 15.992 g/mol |
| Chromic acid | H2CrO4 | 118.01 g/mol |
| Chromic Oxide | Cr2O3 | 151.9904 g/mol |
| Chromium(III) chloride | CrCl3 | 158.35 |
| Chromium(III) nitrate | Cr(NO3)3 | 238.008 |
| Chromium(III) sulfate | Cr2(SO4)3 | 392.16 |
| Chromium(VI) oxide | CrO3 | 99.993 |
| cis -2-Butene | 56.108 | |
| Citric acid | C6H8O7 | 192.123 |
| Cobalt(II) nitrate | Co(NO3)2 | 182.941 |
| Cobalt(II) sulfate | CoSO4 | 154.99 |
| Copper (II) chloride | CuCl2 | 134.45 g/mol |
| Copper Hydroxide | Cu(OH)2 | 97.561 g/mol |
| Copper ii carbonate | CuCO3 | 123.55 g/mol |
| Copper sulfate | CuSO4 | 159.609 g/mol |
| Copper(I) chloride | Cu2Cl2 | 197.99 |
| Copper(I) Oxide | Cu2O | 143.09 g/mol |
| Copper(II) chloride | CuCl2 | 134.45 |
| Copper(II) nitrate | Cu(NO3)2 | 187.554 |
| Copper(II) sulfate | CuSO4 | 159.6 |
| Cyanide | CN− | 26.02 g/mol |
| Cyclohexane | 84.162 | |
| Cyclopentane | 70.135 | |
| Deuterium | 2.014 | |
| Diatomic Bromine | Br2 | 159.808 g/mol |
| Dichloroacetic acid | C2H2Cl2O2 | 128.94 |
| Dichloromethane | CH2Cl2 | 84.93 g/mol |
| Dichromate | K2Cr2O7 | 294.185 g/mol |
| Diethyl ether | (C2H5)2O | 74.123 |
| Dihydrogen monoxide | OH2 | 18.01528 g/mol |
| Diisobutyl | 114.232 | |
| Dimethyl sulfide | (CH3)S | 62.136 |
| Dimethyl sulfoxide | C2H6OS | 78.13 g/mol |
| Dimethylglyoxime | (CH3CNOH)2 | 116.12 |
| Dimetylbutane | 86.178 | |
| Dinitrogen monoxide | N2O | 44.013 g/mol |
| Dinitrogen Pentoxide | N2O5 | 30.07 g/mol |
| Dinitrogen trioxide | N2O3 | 76.01 g/mol |
| Dipotassium Phosphate | K2HPO4 | 174.2 g/mol |
| Duoderane | 170.21 | |
| EDTA, disodium salt | Na2C10H14N2O8 | 336.21 |
| Ethane | C2H6 | 30.07 g/mol |
| Ethane, C2H6 | 30.07 | |
| Ethanol | C2H5OH | 46.069 |
| Ethene | 28.05 | |
| Ethyl Alcohol | 46.07 | |
| Ethyl Chloride | 64.515 | |
| Ethylbenzene | 106.168 | |
| Ethylene | C2H4 | 28.054 |
| Ethylene glycol | (CH2OH)2 | 62.068 |
| Ethylene oxide | H2COCH2 | 44.053 |
| Ethylene, C2H4 | 28.054 | |
| Ethylpentane | 100.205 |
Molecular weight of compounds : from Eugenol to magnesium nitrate
| Compound name | Chemical formula | Molecular weight (g/mol) |
| Eugenol | C10H12O2 | 164.2 g/mol |
| Fluorine | 37.996 | |
| Formaldehyde | CH2O | 30.026 |
| Formic acid | CH2O2 | 46.025 |
| Formic Acid | HCOOH | 46.03 g/mol |
| Fructose | C6H12O6 | 180.156 |
| Glucose | C6H12O6 | 180.156 |
| Glycerin | C3H8O3 | 92.09 g/mol |
| Glycerol | C3H8O3 | 92.094 |
| Helium | He | 4.0026 u |
| Helium, He | 4.002602 | |
| Hexafluorosilicic acid | H2SiF6 | 144.089 |
| Hexamine | C6H12N4 | 140.186 g/mol |
| Hexane | C6H14 | 86.18 g/mol |
| Hydrazine | N2H4 | 32.046 |
| Hydrobromic acid | HBr | 80.912 |
| Hydrochloric Acid | 36.47 | |
| Hydrochemical acid | HCl | 36.46 |
| Hydrocyanic acid | HCN | 27.026 |
| Hydrofluoric acid | HF | 20.006 |
| Hydrogen | H2 | 2.016 |
| Hydrogen bromide | HBr | 80.912 |
| Hydrogen Chloride | 36.461 | |
| Hydrogen chloride | HCl | 36.461 |
| Hydrogen cyanide | HCN | 27.026 |
| Hydrogen peroxide | H2O2 | 34.014 |
| Hydrogen sulfate | HSO4– | 97.064 g/mol |
| Hydrogen Sulfide | 34.076 | |
| Hydrogen sulfide | H2S | 34.082 |
| Hydrogen, H2 | 2.016 | |
| Hydroiodic acid | HI | 127.9 |
| Hydroquinone | C6H6O2 | 110.11 g/mol |
| Hydroxide | OH– | 17.007 g/mol |
| Hydroxyl, OH | 17.01 | |
| Hypobromous acid | HBrO | 96.911 g/mol |
| Hypochlorite | ClO– | 51.449 g/mol |
| Hypochlorous acid | HClO | 52.457 g/mol |
| Hypoiodous acid | HIO | 143.89 g/mol |
| Iodic acid | HIO3 | 175.9 |
| Iodide | I | 253.809 g/mol |
| Iodine | I | 126.90 g/mol |
| Iron iii oxide | Fe2O3 | 159.687 g/mol |
| Iron oxide | Fe2O3 | 159.69 g/mol |
| Iron(II) ammonium sulfate | FeSO4+(NH4)2SO4 | 284.04 |
| Iron(II) sulfate | FeSO4 | 151.9 |
| Iron(III) chloride | FeCl3 | 162.2 |
| Iron(III) nitrate | Fe(NO3)3 | 241.857 |
| Iron(III) sulfate | Fe2(SO4)3 | 399.86 |
| Isobutane (2-Metyl propane) | 58.124 | |
| Isobutanol | C4H10O | 74.123 |
| Isobutene | 56.108 | |
| Isooctane | 210.63 | |
| Isopentane | 72.151 | |
| Isoprene | 68.119 | |
| Isopropylbenzene | 120.195 | |
| Krypton | 83.8 | |
| Lactic acid | C3H6O3 | 90.078 |
| Lactose | C12H22O11 | 342.297 |
| Lead (IV) oxide | PbO2 | 239.1988 g/mol |
| Lead Acetate | Pb(C2H3O2)2 | 325.29 g/mol |
| Lead ii acetate | Pb(C2H3O2)2 | 325.29 g/mol |
| Lead iodide | PbI2 | 461.01 g/mol |
| Lead(II) acetate | Pb(C2H3O2)2 | 325.3 |
| Lead(II) chloride | PbCl2 | 278.1 |
| Lead(II) nitrate | Pb(NO3)2 | 331.2 |
| Lead(IV) acetate | Pb(C2H3O2)4 | 443.4 |
| Lithium bromide | LiBr | 86.844 g/mol |
| Lithium Bromide | LiBr | 86.845 g/mol |
| Lithium chloride | LiCl | 42.39 |
| Lithium hydroxide | LiOH | 23.95 g/mol |
| Lithium iodide | LiI | 133.844 g/mol |
| Lithium oxide | Li2O | 29.88 g/mol |
| Lithium phosphate | Li3PO4 | 115.79 g/mol |
| Magnesium carbonate | MgCO3 | 84.313 g/mol |
| Magnesium chloride | MgCl2 | 95.21 |
| Magnesium hydroxide | Mg(OH)2 | 58.319 g/mol |
| Magnesium iodide | MgI2 | 278.1139 g/mol |
| Magnesium nitrate | Mg(NO3)2 | 148.313 |
Due to the massive footprint of the remaining alphabetical tables (465+ elements), they remain archived securely on our servers. You may query any element directly using our interactive parser above for immediate, precise calculations including full molecular stoichiometry breakdowns.