Molar Mass of Chlorine (2025)

Solving for the atomic mass of Chlorine (Cl)

Need to know the atomic mass of a Chlorine molecule? Our molar mass calculator uses the periodic table and the chemical formula to solve for the molar mass of a chemical compound based on the compound's empirical formula. The calculator takes the elemental composition of the compound and weighs the elements to get an empirical formula mass. Note that the calculator assumes a pure substance - if you're aware of dilution or impurities, make appropriate adjustments for the molarity of a given substance.

This project started with as a molar mass calculator for chemical reactions. You can use our calculator to solve forthe theoretical yield of an experiment. We also have a percent yield calculator which can help you apply this to actual experiments.Use the mole ratio and empirical formula to understand the limits of the reactants.

Other terms: atomic mass of Chlorine, molar mass of Chlorine, molecular mass,

How Does The Molar Mass Calculator Work?

We take the formula you provide (NaCl - common table salt - in our default example) and unpack it into the component elements. Then we compare each atom against a table of the standard atomic weights for that element. We present the results in a table at the bottom ofthe molar mass calculator - it will show the count of atoms, the atomic weight of each element, and the molecular weight for the molecule. It solves for total mass of a molecular formula (average molecular weight).

From there we break the formula for Chlorine into parts - a Chlorine atom, etc.

We don't have brackets implemented (yet), so you will need to unpack any bracketed expressions. They don't affect the weight anyhow.Simply take each element and multiple it by the number of times the bracketed structure occurs. For example: (C₆H₅)₃PCCO => C18H15PCCO

Finding Molar Mass for Other Chemical Compounds

Our molar mass calculator has this for a variety of other compounds: sodium chloride,carbon dioxide, sulfuric acid, glucose...

• Molar Mass of Ammonium aluminium sulfate (AlNH4(SO4)2)
• Molar Mass of Ammonium nitrate (NH4NO3)
• Molar Mass of Barium sulfate (BaSO4)
• Molar Mass of Calcium carbonate (CaCO3)
• Molar Mass of carbolic acid (C6H5OH)
• Molar Mass of graphite (C)
• Molar Mass of methane (CH4)
• Molar Mass of hydrogen cyanide (HCN)
• Molar Mass of sodium bicarbonate (CHNaO3)
• Molar Mass of Sodium bisulphate (NaHSO4)
• Molar Mass of Hydrogen Peroxide (H2O2)
• Molar Mass of Hexane (C6H14)
• Molar Mass of Trinitrotoluene (C6H2(NO2)3CH3)
• Molar Mass of Chloroauric acid (HAuCl4)
• Molar Mass of Hydroiodic acid (HI)
• Molar Mass of Mannitol (C6H14O6)
• Molar Mass of Perchloric acid (HClO4)
• Molar Mass of Potassium permanganate (KMnO4)
• Molar Mass of Sodium carbonate (Na2CO3)
• Molar Mass of Sodium nitrate (NaNO3)
• Molar Mass of Sulfurous acid (H2SO3)
• Molar Mass of Zinc sulfate (ZnSO4)
• Molar Mass of Iron Oxide (Fe2O3)
• Molar Mass of Sodium Oxide (Na2O)
• Molar Mass of Ammonium acetate (C2H3O2NH4)
• Molar Mass of Dichloromethane (CH2Cl2)
• Molar Mass of Phosphorus pentachloride (PCl5)
• Molar Mass of Ammonium bromide (NH4Br)
• Molar Mass of Zinc sulfide (ZnS)
• Molar Mass of Silver carbonate (Ag2CO3)
• Molar Mass of Hypoiodous acid (HIO)
• Molar Mass of Ethylene (C2H4)
• Molar Mass of silver perchlorate (AgClO4)
• Molar Mass of gold cyanide (AuCN)
• Molar Mass of gold trisulfide (Au2S3)
• Molar Mass of ketene (CH2CO)
• Molar Mass of Methanediol (CH4O2)
• Molar Mass of Dicarbon Monoxide (C2O)
• Molar Mass of Magnesium cyanide (MgCN)

Bookmarking, Save, and Share Results

The tool is designed so you can flip between different parts of a problem set. We recommend you bookmark it so you can refer back to it.You can also share results with a study partner or tutor by hitting calculate and copying the URL for this page. When your study partneropens up the URL, they will see your calculations. It's easy share & save results via email. (Be sure to hit calculate first, however)

You also have the option of saving links to the calculations in your research notes files, so you can quickly re-open or check them later.Again - hit calculate first so the URL is updated with your most recent changes. Then copy and save the url.

FAQ - Molar Mass Calculator

What is Molar Mass in Chemistry?

Molar mass is an important concept in adapting chemical formulas to real world conditions. We may be able to balance a chemical equationand determine that one molecule of hydrogen combines with two of oxygen to make water (or the compound of your choice). But how would youset up the materials in the laboratory? Or if you were, for example, buying oxygen for a process, how would you determine how much to useto make a given quantity of water? Molar mass allows us to convert a chemical reaction into specific amounts of reagents required for theprocess. By converting the atomic interaction into grams, we can measure and use an appropriate amount of the necessary reagents. Formula mass helps us solve for this.

What Is Relative Atomic Mass / Relative Molecular Mass / Average Molecular Weight?

The relative atomic mass of a compound is the ratio of the average mass of the elements in a chemical compound to theatomic mass constant, which is defined as 1/12 the mass of a carbon 12 atom. For a single sample, the relative atomicmass of the sample is the weighted arithmetic mean of the masses of the individual atoms present in the sample (alsoknown as the average atomic mass). This will vary by isotope of the element (carbon-12 vs. carbon-13, for example, since the two isotopes have a different atomic mass due to additional neutrons). In thereal world, this can vary based on where the sample was collected - due to variances in the specific isotopes of theelements present (driven by differences in radioactive decay and how the material was aggregated to begin with).

How to find Molar Mass

Take a standard chemistry formula for a molecule, split it up into the component atoms, and look up the molar weight of each atom. Add the weight of the atoms in the molecule and you have the molar mass for the molecule.

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