A school playground is 100 metres long and 100 metres
wide. It has an area of
10,000 m2. One day 10 mm of
rain falls of the playground.
That is equal to 100,000 litres
of water- enough to fill four
large tankers! Write a short
description of what might
happen to all that water.​

1.59 × 10²⁴ molecules

Explanation:

Step 1: Convert the mass to grams

We will use the relationship 1 lb = 453.59 g.

2 lb × (453.59 g/1 lb) = 907.18 g

Step 2: Calculate the moles corresponding to 907.18 grams of sucrose (table sugar)

The molar mass of sucrose is 342.3 g/mol.

907.18 g × (1 mol/342.3 g) = 2.65 mol

Step 3: Calculate the molecules in 2.65 moles of sucrose

We will use Avogadro's number: there are 6.02 × 10²³ molecules of sucrose in 1 mole of sucrose.

2.65 mol × (6.02 × 10²³ molecules/1 mol) = 1.59 × 10²⁴ molecules