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what on earth is a mole, and why is it used in balancing equations

Well... chemistry is the study of very tiny particles (electrons, atoms, molecules). It would be very hard for us to work with, and make calculations with, a single particle. A 'mole' is just 6.022x10^23 of ...
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Answered by Jonjo C. • Chemistry tutor
2185 Views

Solve: a) 5t + 17 = 2. b) x^3 - 25 = 103 - x^3.

a) 5t + 17 = 2. We want to work out what t is. t = ?.To do this we need to get t on it's own , so first we move all the other numbers to equal t.We do this by subtracting 17 from both sides and we should fin...
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Answered by James A. • Maths tutor
3489 Views

Factorise the Quadratic: 3x^2 + 2x - 1.

When we are asked to factorise a quadratic we essentially need to tidy it up by putting it into brackets.For a quadratic we look to work out the sum and the product, however this time it's a bit different as...
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Answered by James A. • Maths tutor
5931 Views

How do I tackle questions that seem only vaguely related to the course I've covered?

These questions are particularly stressful, because they seem completely random. But the most important thing to do is relax and think back to your syllabus. Can you make any links to the topic at hand and s...
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Answered by Juliet S. • Biology tutor
2856 Views

How can I incorporate my work experience into a personal statement for medicine?

I like to think of it in terms of 'point, quote, explanation' the algorithm for structuring answers in English, which you may be familiar with. Start with a transferable skill you want to demonstrate, follow...
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