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A2.   First thing to work out is the moles of NaOH added, since moles = concentration x volume, = 0.0108 mol/dm^3 x 50ml, but need volume to be in units of Litres to match with the units of dm^3 so the fo...

A1.   First it is important to know that nitric acid (HNO3) is a strong acid and so [HNO3] = [H+]    Beaker A contains 100cm^3 = 100ml   Final volume is 150ml (50cm^3 of distilled water is added to beaker...

The main difference is that order of objects matters for permutations. Both involve choosing k objects from a group of size n. Permutations are used to ...

Students may discuss how men and women use language 'differently', by analysing a text in a number of ways. Students may examine differences in the following areas of language: lexis and semantics (the vo...

The left ventricle has a thicker muscular wall and therefore produces stronger contractions.