What is a mole?

A mole is a unit of measurement for the amount of a substance. One mole is 6.02 x 10^23 particles in a substance, known as Avogadro's constant. This is because this is the number of atoms in  12g of Carbon- 12(the relative atomic mass of the carbon atoms). The molar mass is always equal to the atomic mass of an atom, for example 1 mole of oxygen is equal to 16 grams.

LM
Answered by Liam M. Chemistry tutor

3491 Views

See similar Chemistry A Level tutors

Related Chemistry A Level answers

All answers ▸

Consider the following reaction: C2H4 + HBr -> ?. a) What is the product of the reaction? Name the compound and give the structural formula. b) What is the type of the reaction? c) Draw a reaction mechanism.


When you are given a table of half cells with values for electrode potentials, how do you find the strongest oxidising and reducing agent?


Explain why the trend in ionisation energy changes between group 5 and 6


Which has a lower boiling point chlorine or bromine, and why?


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

MyTutor is part of the IXL family of brands:

© 2025 by IXL Learning