Search over 10,000 free study notes

The subjunctive is a mood used in French to express uncertainty, doubt, volition, fear and other emotions. Its use can be triggered by certain verbs or subordinative conjunctions. It is used in subordinat...

Defintions

Rationalising the denominator means rewriting a fraction so that the bottom only contains rational numbers.

Remember: A rational number is one that can be ...

Cancer: what is it?

A cancer happens when cells begin to divide out of control.

Benign tumours are growths of abnormal cells which are contained in one area, usually within ...

Initially drawing a diagram of the two lines helps to establish whether values should be positive or negative and gives a rough approximation of where the answer may be:

By...

Lets say we have 0.89 mol dm-3 of CH3COOH, a weak acid, with a ka of 1.7X10^-5.We want to find Ph, but to do this we first need to know [H+] because PH = -log10[H+].Because CH3COOH is a weak acid, it only...