What is meant by the term 'mole' (and its unit, 'mol') in chemistry? (Hint: not a small burrowing mammal)
The number is chosen, though, so that a large quantity of quantum-sized objects (i.e. atoms, molecules, etc) can be described in more manageable, less awkward values.
For instance, instead of saying we have
#6.022xx10^23 cancel"atoms" xx ("1 mol")/(6.022xx10^23 cancel"atoms")#
#=# #color(blue)("1 mol of atoms")#
It's just a new unit to express a large quantity of things.
We have defined our units so that, for example, the atomic mass of
Suppose we have
The molar mass of
#25 cancel("g N"_2) xx ("1 mol N"_2)/(28.014 cancel("g N"_2))#
#~~ "0.892 mol",#
which is a smaller number and easier to work with.