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Molecular weightalso called molecular massmass of a molecule of a substance, based on 12 as the atomic weight of carbon The molecular weight of a hydrogen molecule chemical formula H 2 is 2 after rounding off ; for many complex organic molecules e. Molecular weight. Info Print Cite. Submit Feedback. Thank you for your feedback. Molecular weight chemistry.

See Article History. Alternative Titles: molecular mass, relative molecular mass. Read More on This Topic. The molecular weight of proteins cannot be determined by the methods of classical chemistry e.

Learn More in these related Britannica articles:. Heavy gases are often more viscous than light gases, but there are many exceptions, and no simple pattern is apparent. Atomic weights are given in atomic mass units; in the case of water, for example, a single water molecule, made up of one oxygen….

History at your fingertips. Sign up here to see what happened On This Dayevery day in your inbox! Email address. By signing up, you agree to our Privacy Notice. Be on the lookout for your Britannica newsletter to get trusted stories delivered right to your inbox. More About.In chemistry, the formula weight is a quantity computed by multiplying the atomic weight in atomic mass units of each element in a chemical formula by the number of atoms of that element present in the formula, then adding all of these products together.

If the formula used in calculating molar mass is the molecular formula, the formula weight computed is the molecular weight. The percentage by weight of any atom or group of atoms in a compound can be computed by dividing the total weight of the atom or group of atoms in the formula by the formula weight and multiplying by Formula weights are especially useful in determining the relative weights of reagents and products in a chemical reaction.

These relative weights computed from the chemical equation are sometimes called equation weights. When calculating molecular weight of a chemical compound, it tells us how many grams are in one mole of that substance. The formula weight is simply the weight in atomic mass units of all the atoms in a given formula. A common request on this site is to convert grams to moles. To complete this calculation, you have to know what substance you are trying to convert.

The reason is that the molar mass of the substance affects the conversion. This site explains how to find molar mass. Using the chemical formula of the compound and the periodic table of elements, we can add up the atomic weights and calculate molecular weight of the substance. We use the most common isotopes. This is how to calculate molar mass average molecular weightwhich is based on isotropically weighted averages.

This is not the same as molecular mass, which is the mass of a single molecule of well-defined isotopes. For bulk stoichiometric calculations, we are usually determining molar mass, which may also be called standard atomic weight or average atomic mass. Molecular weight of C2H5Cl.Enabling you to identify and mitigate the intrinsic risk in your operations, supply chains and business processes.

Learn More. Evaluating how your products and services meet and exceed quality, safety, sustainability and performance standards. Validating the specifications, value and safety of your raw materials, products and assets. Formally confirming that your products and services meet all trusted external and internal standards.

A polymer's properties and performance are influenced by its molecular weight distribution. Our polymer testing laboratories regularly perform molecular weight Mw determination for polymer materials helping our clients to progress new polymer development and material selection, address degradation or materials failure issues and monitor quality across production.

Our experts apply a range of analytical techniques to study the integrity of the material and establish any deviations which may lead to problems such as breakage, crazing and long term degradation. The molecular weight properties of a polymer may vary over the life cycle of a material as the polymer progresses through stages such as raw material, molding, sterilization, and storage.

Our testing, insight and advice can assist you in your decision making process and help to ensure the integrity of the product. Intertek uses gel permeation chromatography GPCalso known as size exclusion chromatography SEC techniques including high temperature GPC, to analyze organic soluble polymers with a MW ranging from — over MW of polymers, soluble in organic solvents eg.

Intertek's polymer scientists perform MW determination for a wide range of polymer materials including acrylics, acrylates, polystyrene, polycarbonates, polysiloxanes. Intertek Global Website. Toggle navigation Intertek. Industries Services. Assurance Enabling you to identify and mitigate the intrinsic risk in your operations, supply chains and business processes. Testing Evaluating how your products and services meet and exceed quality, safety, sustainability and performance standards.

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Molecular weight of C6H5CH2CH3

Need help or have a question? X Title.In chemistry, the formula weight is a quantity computed by multiplying the atomic weight in atomic mass units of each element in a chemical formula by the number of atoms of that element present in the formula, then adding all of these products together.

When calculating molecular weight of a chemical compound, it tells us how many grams are in one mole of that substance. The formula weight is simply the weight in atomic mass units of all the atoms in a given formula. Using the chemical formula of the compound and the periodic table of elements, we can add up the atomic weights and calculate molecular weight of the substance. If the formula used in calculating molar mass is the molecular formula, the formula weight computed is the molecular weight.

The percentage by weight of any atom or group of atoms in a compound can be computed by dividing the total weight of the atom or group of atoms in the formula by the formula weight and multiplying by A common request on this site is to convert grams to moles.

molecular weight of c6h12cl3n

To complete this calculation, you have to know what substance you are trying to convert. The reason is that the molar mass of the substance affects the conversion. This site explains how to find molar mass. We use the most common isotopes. This is how to calculate molar mass average molecular weightwhich is based on isotropically weighted averages. This is not the same as molecular mass, which is the mass of a single molecule of well-defined isotopes.

For bulk stoichiometric calculations, we are usually determining molar mass, which may also be called standard atomic weight or average atomic mass. Formula weights are especially useful in determining the relative weights of reagents and products in a chemical reaction. These relative weights computed from the chemical equation are sometimes called equation weights. Molecular weight of CH3CH3.Simple Structure Advanced History.

Comment on this record. Featured data source. Nitrogen Lost. Stickstoff Lost. Tris 2-chloroethyl amine [Wiki]. Ethanamine, 2-chlor o-N,N-bis 2-chloro ethyl. Ethanamine, 2-chlor o-N,N-bis 2-chloro ethyl - hydrochlor ide. Tris-N-lost [German]. A [DBID]. R 47 [DBID]. NIST Spectra nist ri Microcolumn Sep.

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molecular weight of c6h12cl3n

Click to predict properties on the Chemicalize site. Search ChemSpider: Compounds with the same molecular formula Compounds with the same skeleton Use this molecule in a structure search. Trichloromethane is a solvent, as a chemical intermediate, and in pesticide formulations.

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molecular weight of c6h12cl3n

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Molecular weight

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NIH Substance Repository. Protein 3D Structures. Spectroscopy Databases. Substance Vendors.In chemistry, the formula weight is a quantity computed by multiplying the atomic weight in atomic mass units of each element in a chemical formula by the number of atoms of that element present in the formula, then adding all of these products together. A common request on this site is to convert grams to moles. To complete this calculation, you have to know what substance you are trying to convert.

The reason is that the molar mass of the substance affects the conversion. This site explains how to find molar mass.

Avogadro's Number, The Mole, Grams, Atoms, Molar Mass Calculations - Introduction

Using the chemical formula of the compound and the periodic table of elements, we can add up the atomic weights and calculate molecular weight of the substance. When calculating molecular weight of a chemical compound, it tells us how many grams are in one mole of that substance.

The formula weight is simply the weight in atomic mass units of all the atoms in a given formula. We use the most common isotopes. This is how to calculate molar mass average molecular weightwhich is based on isotropically weighted averages. This is not the same as molecular mass, which is the mass of a single molecule of well-defined isotopes. For bulk stoichiometric calculations, we are usually determining molar mass, which may also be called standard atomic weight or average atomic mass.

If the formula used in calculating molar mass is the molecular formula, the formula weight computed is the molecular weight. The percentage by weight of any atom or group of atoms in a compound can be computed by dividing the total weight of the atom or group of atoms in the formula by the formula weight and multiplying by Formula weights are especially useful in determining the relative weights of reagents and products in a chemical reaction.

These relative weights computed from the chemical equation are sometimes called equation weights. Molecular weight of C6H5CH3.The molecular mass or molecular weight is the total mass of a compound. It is equal to the sum of the individual atomic masses of each atom in the molecule.

It's easy to find the molecular mass of a compound with these steps:. For example, to find the molecular mass of NH 3the first step is to look up the atomic masses of nitrogen N and hydrogen H. Next, multiply the atomic mass of each atom by the number of atoms in the compound. There is one nitrogen atom no subscript is given for one atom.

Search for Species Data by Molecular Weight

There are three hydrogen atoms, as indicated by the subscript. Note the calculator will give an answer of Here's a more complicated example: Find the molecular mass molecular weight of Ca 3 PO 4 2. The tricky part is figuring out how many of each atom are present in the compound. There are three calcium atoms, two phosphorus atoms, and eight oxygen atoms.

How did you get that? If part of the compound is in parentheses, multiply the subscript immediately following the element symbol by the subscript that closes the parentheses.

molecular weight of c6h12cl3n

The final answer uses the correct number of significant figures. In this case, it's five digits from the atomic mass for calcium. Share Flipboard Email. Anne Marie Helmenstine, Ph. Chemistry Expert. Helmenstine holds a Ph. She has taught science courses at the high school, college, and graduate levels.