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Empirical formula is  the simplest ratio of elements in a formula. chemists use it to make big molecules easier to work with when doing calculations.

An example of a working out an empiri...

As is often the case in tackling English questions, there is no right or wrong answer, the key is in choosing a few strong ideas which you can support with evidence from the text and which you can communi...

King Lear is one of those plays which Shakespeare uses to tackle a wide variety of themes, all of which can be analysed deeply individually, but also in terms of their interconnected nature. Some of the m...

There are a range of methods commonly used for differentation, but my favoured method is as follows:E.g. Differentiate 3x^21) Separate into three separate parts - the Coefficient (the number at the front,...

Although differentiation is often taught in an abstract way, it's applications are virtually limitless. It's primary purpose is to determine the gradient of a line at a given point on a curve. Unlike with...