# What is the molar mass of C_6H_6?

Feb 14, 2016

The molar mass of the compound $\text{C"_6"H"_6}$ is $\text{78.1118 g/mol}$.

#### Explanation:

The molar mass of a compound is the mass of one mole in g/mol. It is determined by multiplying the subscript of each element by its molar mass, which is its relative atomic mass on the periodic table in g/mol.

Determine the Molar Mass of $\text{C"_6"H"_6}$

First determine the molar mass of each element by using the periodic table.

Molar mass of $\text{C:}$ $\text{12.0107 g/mol}$

Molar mass of $\text{H:}$ $\text{1.00794 g/mol}$

Next determine the molar mass of $\text{C"_6"H"_6}$.

(6xx12.0107"g/mol")+(6xx1.00794"g/mol")="78.1118 g/mol"

The molar mass of the compound $\text{C"_6"H"_6}$ is $\text{78.1118 g/mol}$.

Note: Some periodic tables give the relative atomic mass of carbon as 12.011 and 1.008 for hydrogen.

Also Note: If you aren't required to show how to calculate the molar mass, there are reliable websites where you can look it up. One site, believe it or not, is Wikipedia. Another site is The Pubchem Project at http://pubchem.ncbi.nlm.nih.gov/.