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Define the "standard enthalpy change of atomisation".

This is a standard definition question that is relatively common in A level papers. The standar molar enthalpy change of atomisation is defined as the enthalpy change when 1 mol of an element in its standard...
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Answered by Daniel G. • Chemistry tutor
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What are the key steps in the light dependent reaction of photosynthesis?

Light energy from the Sun excites electrons in chlorophyll and the excited electrons are emitted.2. The chlorophyll molecule is now positively charged and chemically less stable. The lost electrons get repla...
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Answered by Aditi A. • Biology tutor
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What are the steps involved in the mark-release-recapture technique and which factors does it rely upon?

Mark-release-recapture is a technique used to estimate the size of a population of a particular species. The steps involved are:1. Capture and count animals.2. Mark them in a way which is not toxic/harmful t...
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Answered by Aditi A. • Biology tutor
39928 Views

How do you solve an equation by completing the square?

Firstly, you can only complete the square on quadratic functions (functions in the form Ax 2 +Bx+C) If A=1, C onsider B, the coefficient of x. Substitute it into ( x + (B/2) ) 2 . We know if we multiply this...
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Answered by Emma J. • Maths tutor
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How do I write a poetry comparison essay?

The most important part of any English essay is the planning: you need to make sure that you know what you are writing about before you start. With a poetry comparison essay, you will usually be looking for ...
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