Question

Part AHow many copper atoms are in a pure copper statue with a mass of 154 kg ?

Answer 1

First, we write what Avogadro's number states:

1 mol of Cu = 63.54 g of Cu = 6.02x10^23 atoms of Cu

Now, we proceed like this:

(1 kg = 1000 g) ====> 154 kg = 154,000 g

63.54 g Cu ---------- 6.02x10^23 atoms Cu

154,000 g Cu---------- X

X = 1.46x10^27 atoms Cu

Answer: 1.46x10^27 atoms Cu