An equation is a mathematical expression that contains an equals symbol. Equations often contain algebra. Algebra is used in Maths when we do not know the exact number in a calculation - this unknown ...

SN1 and SN2 reactions are fundamental types of nucleophilic substitution in organic chemistry, each with distinct mechanisms ...

To use Singapore Bar Modelling you need to be able to set up bars. These bars are just rectangles. It is important, where possible, that we draw the bars in proportion. For example if one bar is worth ...