# What is the molar mass of NaCl (table salt)?

##### 2 Answers

#### Explanation:

*Sodium chloride*, also known as table salt, is an ionic compound composed of sodium cations, *formula unit*

The *molar mass* of an anionic compound tells you what the mass of **one mole** of *formula units* of that respective compound is.

You know that sodium chloride's formula unit contains

one sodium atomone chlorine atom

This means that sodium chloride's *molar mass* will be the **sum of the molar masses** of those two atoms.

#M_"M NaCl" = M_" MNaCl" + M_"M Cl"#

A quick look in the periodic table and you'll see that the molar masses of sodium and chlorine, respectively, are

#"Na " -> " 22.989770 g/mol"# #"Cl " -> " 35.453 g/mol"#

Therefore, the molar mass of sodium chloride will be

#M_"M" = "22.989770 g/mol" + "35.453 g/mol" = color(green)("58.44277 g/mol")#

In stoichiometric calculations, this value is often used as

The molar mass of sodium chloride is 58.44 g/mol.

#### Explanation:

The molar mass of sodium is 22.990 g/mol. The molar mass of chlorine is 35.45 g/mol.

To calculate the molar mass of NaCl, multiply the subscript of each element times its molar mass, then add them together. If there is no subscript, it is understood to be