What is the mass of 4 moles of aluminium atoms?(Atomic mass of Al = 27 u) A 100 g C 140 g B 108 g D 160 g

The mass of one mole of a substance, in grams, is numerically equal to the atomic mass of that substance. So, the atomic mass of Aluminium (Al) is 27 atomic mass units (u).

Step 1: Identify the atomic mass of Aluminium (Al) which is 27 u.

Step 2: Since the atomic mass of Al is equal to the mass of 1 mole of Al, we can say that 1 mole of Al is 27 grams.

Step 3: To find the mass of 4 moles of Al, we multiply the mass of 1 mole of Al by 4.

27 g/mole * 4 moles = 108 g

So, the mass of 4 moles of aluminium atoms is 108 grams. Therefore, the correct answer is B 108 g.