# How to calculate the molar mass ## Contents

• 1 How to calculate the molar mass
• 2 molar mass
• 3 Examples of molar mass account 3.1 molar mass of the elements 3.2 molar mass of molecules 3.3 molar mass compounds
• 3.1 molar mass of the elements
• 3.2 molar mass of molecules
• 3.3 molar mass compounds
• 4 References

## How to calculate the molar mass

The molar mass account, or block one mole of any element or molecule by following these steps: 

• Find the atomic mass of each element through the use of atomic masses in the periodic table, or in the atomic weights table.
• Multiplying the number of atoms of the element in the atomic mass for him.
• Collection of atomic masses of the elements in the molecule to obtain molecular mass in the case of molecules.

## Molar mass

Molar mass is a unit to calculate the weight of any chemical substance, whether an element or a compound, which is the sum of all atomic masses in the chemical formula,  as they block the mall one of the sample, and is expressed in molar mass unit pg / Mall. 

## Examples of molar mass account

### Molar mass of the elements

Can molar mass account for sodium element (Na) by found directly from the periodic table, which is equal to one mole of sodium, ie 22.99 g / mol, as can the molar mass of the oxygen account (O2) by finding a block mall and one of it, and as the oxygen It is a divalent molecule, and the atomic weight is 16.00 grams has the molar mass = 2 * 16.00 = 32.00 g / mol. 

### Molar mass of molecules

Can the molar mass of the water account (H2O) by atomic mass collection of elements in a molecule of water to get the molecular mass as follows: 16.00 * 1 (oxygen) 1.008 * 2 (hydrogen) = 18.02 g / mol. 

### Molar mass of vehicles

The molar mass account for a compound of sodium carbonate as follows: 

• Use the chemical formula of a compound of sodium carbonate, which is (Na2CO3) to determine the number of atoms of each element present therein.
• Find the product of the molar mass of each element with the number of female relative in the compound as follows: (2 * 23.0 sodium), and (1 * 12.0 carbon), and (3 * 16.0 oxygen).
• Collection of atomic masses of the elements to find the molar mass of the compound, which is equal to 46.0+ 12.0+ 48.0 = 106 g / mol.

## References

• ^ أ ب ت Anne Marie Helmenstine, Ph.D. (5-2-2018), "Molar Mass Example Problem"، www.thoughtco.com, Retrieved 31-3-2018. Edited.
• ↑ "Definition of molar mass", www.chemistry-dictionary.com, Retrieved 31-1-2018. Edited.
• ↑ " Computing molar mass (molar weight)", www.webqc.org, Retrieved 31-3-2018. Edited.
• ↑ "Stoichiometry Tutorial Finding Molar Mass", www.occc.edu, Retrieved 31-3-2018. Edited.

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