Answer:
38.3×10²³ atoms of oxygen
Explanation:
Given data:
Moles of NO₃ = 2.12 mol
Atoms of oxygen = ?
Solution:
One mole of any substance contain 6.022 × 10²³ atoms.
The number 6.022 × 10²³ is called Avogadro number.
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.
One mole of NO₃ = 6.022 × 10²³ atoms
one molecule of NO₃ contain three atoms of oxygen thus in 2.12 moles number of oxygen atoms are:
2.12×3× 6.022 × 10²³ atoms = 38.3×10²³ atoms of oxygen
