Question

What is the molar mass of acetic acid?

Answer 1

Hint: Acetic acid is the compound that comes under the group of carboxylic acid because there is a –COOH group present in the compound and there are two carbon atoms present in it. The formula is $C{{H}_{3}}COOH$so, to find the molar mass, add all the atomic mass of the elements present in it.

Complete answer:
When we calculate the mass of one mole of a particular substance or element is known as the molar mass of that substance or element. We can also define the molar mass of a substance as the number of grams per mole of a substance. We know that in one mole of a substance there are a large number of atoms or molecules of that specific compound and the total mass of all the atoms or molecules is known as molar mass.
So, we have to find the molar mass of acetic acid. Acetic acid is the compound that comes under the group of carboxylic acid because there is a –COOH group present in the compound and there are two carbon atoms present in it. The formula is ,$C{{H}_{3}}COOH$, so there is a total of 2 carbon atoms present, 4 hydrogen atoms, and 2 oxygen atoms present.
The molar mass of the carbon atom is 12.01 g/ mol, the molar mass of the hydrogen atom is 1.008 g/ mol, and the molar mass of the oxygen atom is 32 g/ mol.
So, molar mass of $C{{H}_{3}}COOH$, will be:
$2\text{ x 12}\text{.01 + 4 x 1}\text{.008 + 2 x 16}\text{.00 = 60}\text{.05 g/ mol}$
Therefore, the molar mass of acetic acid is 60.05 g/ mol.

Note:
The other name of acetic acid is Ethanoic acid because there are two carbon atoms present in it. Do not forget to multiply the number of atoms of the element present in the compound.