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A racemic mixture contains a 50-50 mixture of two optical isomers. Optical isomers are identical in molecular structure but rotate the plane of polarized light in different directions (one rotates clockwi...

These are two different GCSEs that some students, including myself when I was starting KS4, find difficult to understand the varying skills that each require. For optimum success in GCSE English Language,...

Structurally, DNA and RNA are very similar. They're both composed of a backbone of sugar, a phosphate group and a chemical base. However, the sugar in DNA is a deoxyribose sugar and the sugar in RNA is a ...

You’ve been taught elimination and substitution. (You should also be able to solve simultaneous equations graphically.) In the elimination method, you multiply up the equations to make them have a term th...

First concentrate on expanding out the first set of brackets: 4(2x+1).Multiply the contents of the bracket by 4, giving 8x+4.Next concentrate on expanding out the second set of brackets not forgetting ...