Answer: 1.806 x 10∧24 particles
Step-by-step explanation:
A mole is the amount of a substance that contains 6.02 x 10∧23 respective particles of that substance.
It means that 1 mole of Aluminium contain 6.02 x 10∧23 particles (Avogadro's Number).
∴ 3 moles of Aluminium would contain;
3 x 6.02 x 10∧23 = 1.806 x 10∧24 particles