The total population of the world is now believed to be about `4.2 xx 10^9` . How many moles of people is this? If you had one sulphur atom for each person, what would be the weight of the sulphur sample?

Explanation

To solve the problem, we will follow these steps:

### Step 1: Calculate the number of moles of people
To find the number of moles of people, we will use Avogadro's number, which is approximately \(6.022 \times 10^{23}\) entities (atoms, molecules, or in this case, people) per mole.

Given the total population of the world is \(4.2 \times 10^9\):

\[
...