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First of all before sitting an exam practice not only writing essays, but also writing plans. A good plan should be detailed and you can take 10 minutes at the start of your exam to make a thorough plan s...

With this question it is important to focus on the human contribution to global warming rather than explaining why global warming is happening. 

Start your answer by explaining that carbo...

A freely falling object in air (or any other fluid for that matter) experiences two forces: the gravitational force and the force due to air resistance (or drag force).
While the gravitational fo...

Phenol (which is a benzene ring with one substituted carbon with a hydroxyl or alcohol group) does not require a halogen carrier to be halogenated whereas benzene itself cannot react with a halogen alo...

The best way to think of a mole is the same way you would consider a dozen to be 12 but in this case a mole is 6.2 x 10²³ molecules. 

You can use moles to work out the mass of ...