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What is a buffer?
A buffer is a solution that resists a change in pH when small amounts of acid or base are added. It is composed of either a weak acid or a weak base wit...
As well as learning key dates, facts and issues, a really important revision tip would be to go over past paper questions where you can get access to them. The benefit of this is to enable you to think...
Definite integrals produces a numerical answer. It is asking the question: what is the area under the curve f(x) between x=a and x=b.
Indefinite integrals produces a function. It is askin...
Monopolies generate economic profit and are therefore better able to invest in research & development which may improve their productive effiency, making them more dynamically efficient over time.
Usually in clauses that express purpose, intention, doubt or past allegations. Such examples would include purpose clauses, indirect questions, conditional clauses and result clauses.
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