Question

Find the molecular weight of mass number of the following?

1. calcium carbonate caco3

2.water H2o

3.Sulphuric acid H2 So4

4.nitric acid HNo3

5.zinic sulphuric So4

6.carbon oxide Co2

7.sulphuric dioxide S02​

Answer 1

Chemical formula of calcium carbonate ⟶CaCO3.

Mass of Calcium⟶40.

Mass of Carbon⟶12.

Mass of Oxygen⟶16.

Add all the masses obtained after multiplication.⟶CaCO3.

=1×40+1×12+3×16.

=40+12+48.

=100.

Mass of two moles of Hydrogen atoms = 2x 1 g/mol = 2 g/mol. On adding all the above-obtained values we get, Mass of one mole of water = 2 g/mol + 16 g/mol = 18 g/mol.

molar mass of H2SO4is98. 08 g/mol

The molar mass of the chemical substance is equal to the sum of the atomic mass of the individual atoms. (1 × 1) +(1 × 14) + (16×3) = 63 u.

The molecular mass of carbon dioxide is 44.01amu. The molar mass of any compound is the mass in grams of one mole of that compound. One mole of carbon dioxide molecules has a mass of 44.01g, while one mole of sodium sulfide formula units has a mass of 78.04g. The molar masses are 44.01g/mol and 78.04g/mol