If one mole of aluminium contains 6 x 10²³ atoms of aluminium, how many atoms are contained in 0.9g of aluminium?
(Al = 27)

• A.1.0 x 10²¹
• B.6.6 x 10²¹
• C.2.0 x 10²²
• D.1.0 x 10²²
• E.5.4 x 10²³