Here we calculate the molar mass of sucrose and explain the brief introduction of sucrose. Do you know what is molar mass and how we calculate it?
Molar mass is the mass of one mole of a substance expressed in a gram. Molar mass is measured in grams per mole (g/mol). The formula to calculate the molar mass of the substance is given:
M = m/n
- M = molar mass
- m = mass of substance express in grams
- n = number of moles of substance
How Do You Find the Molar Mass of Sucrose (C12H22O11)?
Sucrose is the most common sugar also known as table sugar (scientific name). People used sucrose every day to sweeten the food. It is manufactured from sugar beets or sugar cane. It is one of the commercial organic chemical which is manufactured in large quantity in pure form. The main source of sucrose is sugarcane. The Residue known as bagasse, is used in the manufacture of paper or as a fuel.
Now we find the molar mass of sucrose. The chemical formula of sucrose is C12H22O11. Sucrose contains carbon, hydrogen, and oxygen atoms.
- The atomic mass of a carbon atom is 12.01 g
- The atomic mass of a hydrogen atom is 1.008 g
- The atomic mass of an oxygen atom is 16.0 g
Molar mass of sucrose = 12 × atomic mass of a carbon atom + 22 × atomic mass of a hydrogen atom × atomic mass of an oxygen atom
Molar mass of sucrose = (12 × 12.01) + (22 × 1.008) + (11 × 16.0)
Molar mass of sucrose = 144.12 g + 22.18 g + 176.0 g
Molar mass of sucrose = 342.3 g
What Exactly is Molar Mass?
As we know that the relative atomic mass of an element is expressed in terms of “u”. The relative atomic mass of an element expressed in grams instead of “u” is called gram atomic mass. Now let’s take a few elements and try to find their gram atomic mass. The gram atomic mass of the oxygen atom is 16 g. As we know that the relative atomic mass of oxygen atom is 16 u, we just need to replace the unit “u” by grams and we get the gram atomic mass of oxygen.
Similarly, helium has a relative atomic mass of 4 u, so its gram atomic mass becomes 4 g. In the same way, sodium has a relative atomic mass of 23 u, so its gram atomic mass becomes 23 g.
We also know the term relative molecular mass of compounds and it is also expressed in “u”. The relative molecular mass of a compound expressed in grams instead of “u” is called gram molecular mass. Now let’s find out the gram molecular masses of some molecules like oxygen, water, sodium hydroxide, etc. The relative molecular mass of the oxygen molecule, O2 is 32 u. When we replace “u” with grams, we get the gram molecular mass of oxygen. So, the gram molecular mass of oxygen O2 is 32 g.
Similarly, water molecules have a relative molecular mass of 18 u. Thus the gram molecular mass of the water molecule is 18 g. In the same way, a sodium hydroxide molecule has a gram molecular mass of 40 g since its relative molecular mass is 40 u.
Now we have learned about two things, gram atomic mass, and gram molecular mass. The term gram atomic mass applies to atoms or ions or elements but on the other hand, the term gram molecular mass is applied to molecules or compounds. These two terms (gram atomic mass and gram molecular mass) are collectively called molar mass. So we can be defined as,
Molar Mass of an Element
The molar mass of an element is its relative atomic mass expressed in grams.
Molar Mass of a Compound
The molar mass of a compound is its relative molecular mass expressed in grams.
What are the Difference Between the Two Units “u” and “grams”?
In the above diagram, we conclude that the unit “u” is much much smaller or we can say extremely smaller as compared to the unit “grams”.
UO Chemists’ Molar Mass Calculator is the perfect tool for chemists and scientists of all levels. Whether you’re a student or a professional, our calculator will help you accurately determine the molecular weight of any compound.