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We need to find the value of X (the water of crystallisation) and to do this we can start by calculating the moles of water lost and the moles of the anhydrous salt (the salt product without water), we do...

As can be seen by studying the gradients of sin(x) at key points such as 0, 90, 180, 270, 360 degrees, the gradient of sin(x) at any point, x, is equal to cos(x). [This would be shown on sketches of the f...

First Past the Post is the voting system used across the UK (although used in combination with the Party List System in Scotland!). In this system, each voter places a single vote for a candidate standing...

Lorenz and Harlow studied animals as a way to find out about attachments. Lorenz used Greylag goose eggs and randomly divided them into two groups. Half of the eggs were raised with their mother in their ...

AQA recommends spending 40 minutes answering this exam question, but you should definitely spend the first 5-10 minutes of that time planning. First of all break down the question; we have a quote and we ...