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Empirical formula is  the simplest ratio of elements in a formula. chemists use it to make big molecules easier to work with when doing calculations.

An example of a working out an empiri...

MgCO₃ +2HCl --> MgCl₂ + H₂O +CO₂

For this kind of question, I would always try to convert what I can into moles because tha...

In chemistry if a substance is oxidised it loses electrons in a reaction.

If a substance is reduced it gains electrons in a reaction.

A reaction that has both oxidation and ...

A catalyst provides an alternative pathway for a reaction to take place and therefore helping the reaction to take place at a lower activation energy. In an equilibrium process, a catalyst has no effect o...

Covalent bonds are a type of chemical bond formed by a shared pair of electrons between atoms. 

Covalent bonds tend to occur between non-metal type atoms ...