What is the difference between moles and molar?

Lets start with what a concentration is. Concentration is the amount of something in a volume. For example, 1 gram of sugar in one litre of water is 1 gram per litre. This can be written as 1g/L (the division sign means "per"). When we are talking about moles, we are talking about an amount of something. 1 mole actually equals a certain amount of molecules (6.03x10^23 molecules to be exact). So one mole of sodium hydroxide literally means 6.03x10^23 molecules of sodium hydroxide.

Molar is a concentration. It means "moles per litre". So because mole is an actual amount, this means the amount of a molecule in a litre of liquid. For example, 1 molar sodium hydroxide would mean 1 mole of sodium hydroxide (6.03x10^23 molecules) in 1 litre.

BR
Answered by Ben R. Chemistry tutor

52393 Views

See similar Chemistry GCSE tutors

Related Chemistry GCSE answers

All answers ▸

Calculate the pH of the buffer solution resulting from mixing 250 cm^3 of 0.3 moldm^-3 ethanoic acid with 250cm^3 of 0.2 moldm^-3 sodium hydroxide. The Ka of ethanoic acid is 1.8 x 10^-5.


What are the relative masses of protons, neutrons and electrons?


Explain why graphite conducts electricity. The answer should include structure and bonding of graphite.


Nitric acid reacts with magnesium and fizzing occurs. Write a word equation and a balanced chemical equation for this reaction.


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