Question

What is the mass of 4 moles of aluminium atoms?

Answer 1

The atomic mass of aluminium is given to be 27 u. 

So, 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 x 4 g

= 108 g

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