Question

Calculate the molar mass of benzene?

Answer 1

Hint: As we know that the benzene is an aromatic chemical compound having the chemical formula, $C_6{H}_6$. The benzene contains six numbers of carbon atoms and each of the carbon is attached with one hydrogen atom in a planar ring. And the benzene contains only carbon and the hydrogen atoms and it is considered as a hydrocarbon. The benzene is light yellow in colour at room temperature and it is highly flammable which evaporates very quickly into the air.

Complete answer:
We have to remember that the molar mass of a compound can be found out by adding the molar mass of each compound and it is multiplied with the number of each atom present in the compound. The atoms present in the substance are carbon and hydrogen.
The molar mass of carbon $=12.01g/mol$
The molar mass of hydrogen $=1.01g/mol$
Multiply these molar masses with the number of each element present in the benzene. The number of carbon atoms present in the benzene is equal to six and the number of hydrogen atoms is equal to six. Hence,
$C:12.011g/mol\times 6=72.066g/mol$
$H:1.00g/mol\times 6=6.048g/mol$
Adding these values to get the molar mass of the benzene.
$6.04g/mol+2.066g/mol=78.114g/mol$
The molar mass of benzene is equal to $78.114g/mol$

Note:
As we know, the molar mass of the chemical element can be calculated by adding the standard atomic masses in g/mol of correspondent atoms. And the molar mass of benzene is equal to$78.114g/mol$. There are three alternative double bonds present in the benzene and it is soluble in the organic solvents and it has an aromatic odor. The density of benzene is less than water.