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We can work this out by observing the changes in oxidation state of sulphur in concentrated sulphuric acid (H₂SO₄) when this compound reacts with KCl, KBr and KI individually.
A...

ATP is a molecule called adenosine triphosphate, used to provide energy for various reactions within the cell and hence sometimes called 'universal currency' of the cell. ATP molecule is made of adenine, ...

For this question I would consider different methods for finding the roots of quadratics and remind the student that an exam could ask for a particular method to be used (as on one of the recent GCSE math...

Firstly I would state the substitution rule, letting 5xCos(3x)=w(x), and differentiating with respect to w(x). This gives y'(x)=2w'(x)(w(x)).I would then demonstrate the product rule stating ...