Question

What is the mass of u of 4 moles of aluminium atom?

Answer 1

mass of 4 moles Al = 4×27 = 108g

Answer 2

Answer:

Atomic mass of aluminium is given to 27 u. This means that 1 mole of aluminium atoms has a mass of 27 grams.

Now, 1 mole of aluminium atoms = 27 g

So, 4 moles of aluminium atoms = 27 × 4 g

= 108 g

Thus, the mass of 4 moles of aluminium atoms is 108 grams.