Determine the number of molecules contained in 1 mole of sodium sulfate

6.022 * 10²³ Molecules of Na₂SO₄

Explanation:

Mole is an amount unit. One mole of any substance contains exactly 6.022 * 10²³ particles which is also called as Avogadro's Number. So in order to calculate the number of molecules contained by 1 mole (incase if the moles given are not 1 then following method is used) of Na₂SO₄, we will use following relation,

Moles = Number of Molecules : 6.022 * 10²³ Molecules. mol⁻¹

Solving for Number of Molecules,

Number of Molecules = Moles * 6.022 * 10²³ Molecules. mol⁻¹

Putting values,

Number of Molecules = 1.0 mol * 6.022 * 10²³ Molecules. mol⁻¹

Number of Molecules = 6.022 * 10²³ Molecules of Na₂SO₄

Hence,

There are 6.022 * 10²³ Molecules present in 0.280 moles of Br₂.