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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...

As the charge of an ion increases, so does its charge density. The ion can therefore form stronger electrostatic forces of attraction, resulting in stronger bonds. As these bonds form to produce a lattice...

An aldehyde will react with Tollen's reagent to form a characteristic silver mirror, whereas a ketone will not react. This is because an aldehyde can be oxidised to a carboxylic acid, reducing Tollen's re...