Moles :)

i have learnt a lot about mole concept during chemistry lesson today. i am also able to see how concentration, mass, volume and Avogadro's Constant are connected to moles.

To calculate moles, i can use many formulas. Some examples are:

1. mole = mass/ Mr
2. mole= concentration/ volume
3. mole= no. of particles/ Avogadro's Constant.


i also learnt how to find Ar by this formula:

I and Y are isotopes of an element.

Ar= ( relative isotopic mass of I x % abundance of I) + ( relative isotopic mass
of substance Y x % abundance of substance Y) / 100