So, what actually is a mole?

A mole is simply a unit of measurement of any substance that contains as many atoms as there are in 12 grams of Carbon-12.

 

Why Carbon-12?

Carbon-12 is the standard by which we compare the mass of any other molecule however; it was not the first option. Originally Hydrogen-1 was used but this was soon discarded as they realized that because of its low mass it was very inaccurate. This is because Hydrogen-1 had a mass of 1.007825- you can imagine how hard it would be to calculate precisely every time! Whereas, Carbon-12 has a mass of 12.000000 so this allows for more precise answers when working out the mass of other molecules.

PQ
Answered by Patrick Q. Chemistry tutor

3732 Views

See similar Chemistry GCSE tutors

Related Chemistry GCSE answers

All answers ▸

What is an exothermic reaction?


How many moles are in 6g of carbon?


Diamond and Graphite are both giant covalent structures. If they are both made of carbon why does diamond have a higher melting point?


Balance the equation and write the products of this reaction. _Mg + _HCl -> _...... +_ ......


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences