Hi,

Molecular weight of CaCO3 is 100g/mol.

The molecular weight of CaCO3 can be calculated as -

Mass of Ca =              40

Mass of carbon =      12

Mass of oxygen = 16

So

Mass of CaCO3 = 40 + 12 + 16 ×3

= 40 + 12+ 48

=100

Calcium carbonate has the chemical formula CaCO3. The molar mass of CaCO3 is 100.0869 g/mom

Mass of Calcium40

Mass of Carbon12

Mass of Oxygen16

Multiply mass of each element by number of atoms of that element.

Add all the masses obtained after multiplication.

CaCO3

=1×40+1×12+3×16

=40+12+48

=100

Hello Saikumar,

The molecular weight of the molecule of CaCO3 is 100.0869 g/mol

This compound is also known as Calcium Carbonate. (https://www.convertunits.com/molarmass/Calcium+Carbonate)

Percent Composition Of Element,

Calcium-Ca-40.078-40.043%

Carbon-C-12.0107-12.000%

Oxygen-O-15.994-47.957%

CaCO3 is called calcium carbonate and it comprises of more than 4% of earth crust and is found throughout the earth. it's common natural forms are limestone, chalk and marble produced by sedimentation of shells of small fossilized snails. Its molecular weight is 100 gram/ mol.