Question

In 100 g of CaCO₃

a. Find out the number of moles of each element and atom. 

b. Find out the total number of atoms of each element.

Answer 1

a. In 100 g of CaCO₃, number of moles

in molecules = \(\frac{100}{100}\) = 1

(GMM of CaCO₃ = 100)

1 mole CaCO₃, Ca = 1mole;

Carbon = 1 mole; Oxygen = 3 moles

b. Total number of atoms Ca

= 6.022 x 10²³; C = 6.022 x 10²³;

Oxygen = 3 x 6.022 x 10²³