The action or power of focusing one's attention or mental effort.
a substance produced by a living organism that acts as a catalyst to bring about a specific biochemical reaction.
a substance that slows down or prevents a particular chemical reaction or other process, or that reduces the activity of a particular reactant, catalyst, or enzyme.
Organic chemistry is the study of molecules containing carbon, so A
There are two scales, one is a Ritcher scale and another one is called a Mercalli scale.
