What is a mole also called?
Avogadro’s constant.
What number is a mole?
6.02 x 10 ^23
What is so special about a mole?
One mole of atoms or molecules of any substance will have a mass in grams equal to the relative particle mass (Ar or Mr) for that substance.
What is the formula for number of moles?
Number of moles = mass (g) ÷ Mr or Ar