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What is the difference between pH and pKa?

pH is the measure of the concentration of proton in an aqueous environment, which is denoted as: pH = -log[H 3 O + ]. pKa however, is prefered when comparing how strong an acid is because it's the pH at whic...
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Answered by Anthony M. Chemistry tutor
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How do you know when to use sin, cos and tan?

First draw the triangle and label all the information you have as well as the unknown angle or side length. There should be at least one angle labelled with some informtion - use this angle to label the oppo...
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Answered by Anna W. Maths tutor
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What are the four stages of aerobic respiration in humans?

Glycolysis which is where glucose is broken down into 2 molecules of pyruvate releasing 2ATP and 2NADH. Second is the link reaction. This links glycolysis to the Krebs Cycle. Pyruvate molecules are decarboxy...
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Answered by Taqua K. Biology tutor
7878 Views

Find the indefinite integral of 3x - x^(3/2) dx

To find the integral of a function you must first incease the power of x by one then divide to coefficient by the new power. So, by increasing the powers first you get 3x^2 - x^(5/2) and then dividing by the...
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Answered by Alex J. Maths tutor
5816 Views

What does my teacher mean when he says my essay doesn't link?

Unlike in GCSE History, at A Level the arguments you make in your essay need to link together to then provide an answer to the question. Let's take the question "why did war break out in North America i...
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Answered by Ruairidh C. History tutor
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