Question

Calculate the number of oxygen atoms in 10g of substance

Answer 1

Explanation:

atomic weight of CaCO3 is 100,

given wt. -10g

no. of moles given wt. Atomic wt.

therefore no. of moles =0.1

no. of atoms in 1 CaCO3 molecule = 5

no. of atoms in o.1 mole = 5x0. 1xAvagadro's no.