3.1.2.2 The Mole And The Avogadro Constant

Question 1

How many atoms are in a mole?

Answer 1

23

6.022 X 10

Question 2

If you have one mole of MgCl, how many atoms do you have?

Answer 2

You have one mole of molecules of MgCl

This means you have one mole of magnesium atoms and one mole of chlorine atoms. This is two moles worth of atoms

Question 3

How do you work out mass from moles?

Answer 3

Mass (g) = moles ✖️ Ar (g mol-1)

Question 4

How do you work out moles from concentration?

Answer 4

Amount (mol) = concentration (mol dm3) ✖️volume (dm3)