How many atoms of O are in 2.12 miles of NO3

38.3*10²³ atoms of oxygen

Explanation:

Given dа ta:

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