Use hormone and feedback mechanism in the same sentence

When determining the shape of a molecule, it is important to draw a lewis dot structure first in order to see the total number a. electrons within the moleculeb. bonding and unshared pairs around central atomc. unshared pair within the molecule( i really need it )

How would the number of moles (n) of o2 change if the atmospheric pressure doubled but all other variables stayed the same

Ineed to find the answer of this question because i dont understand it