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It's really useful to know that 'phile' means love.

Electrophiles 'love' negative charge - this means they are attracted to regions of negative charge. And as such they tend to be positiv...

A relevant equation is:

mass = moles x relative formula mass 

Also written:

m = n*M_r

This reaction is a 1:1 ratio of salicylic acid to...

When approaching a question like this I always find it easier to write out the equation with the known quantities written underneath each individual compound. ...

Bond lengths - a single bond is 0.153nm while a double bond is 0.134nm, making Kekulé's model of alternating single and double bonds asymmetric. Other evidence shows benzene to be symmetr...