1: What is a mole?

No, but moles are fascinating animals – they eat 50% of their weight in worms daily and scent-mark
their tunnels.

No, this is chicken mole. Yummy, but no cigar.

Yes, these bars each represent 1 mole of a particular metal –
copper, iron, zinc, or aluminium.


To be a little more exact, a mol is approximately 6.022 × 1023 atoms or molecules. The unit of mole is ‘mol’. A mol is not a measure of WEIGHT – rather, it is a measure of NUMBER, similar to a “dozen”. You can have a dozen eggs, and that would weigh about 600 grams. A dozen donuts would weigh about 700 grams, and a dozen cornflakes would weigh about 6 grams. So,

1 dozen = 12 of something

1 mol = 602,200,000,000,000,000,000,000 of something