Mole Concept Question

Question

Calculate the number of moles of molecules in 2.4*10²⁴ atoms of hydrogen

Answer 1

2.4 • 10²⁴ divided by Avogadro constant equals number of moles

2.4 • 10²⁴ / 6.022 • 10²³ is approximately 3.985 moles of hydrogen

Answer 2

Number of atoms of He = 2.4 x 10²⁴ atoms

Number of moles of He = ?

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.

The number 6.022 x 10²³ is called Avogadro number.

1 mole = 6.022 x 10²³ atoms

2.4 x 10²⁴ atoms × 1mol / 6.022 x 10²³ atoms

0.398 x 10¹ mol

3.98 mol ≅ 4 mol