Videos are arranged into playlists according to topics/modules so the channel is easy to navigate. There are some very good calculation videos and each one includes example exam questions to help put it into context. Freesciencelessons

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Cambridge International As and A Level Chemistry Revision Guide is edited by David Bevan and published by Hodder Education, UK in 2011. This book is intended to help you to prepare for your University of Cambridge International AS and A level chemistry examinations. It is a revision guide, which you can use alongside your usual textbook as you work through your course, and also towards the end when you are revising for your examination. The parties do not intend that any provisions of this Agreement shall be enforceable by virtue of the Contracts (Rights of Third Parties) Act 1999 by any person not a party to it. 11. Entire Agreement