The avogadro constant and the mole

Question 1

What is relative atomic mass (Ar)?

Answer 1

• the average mass of an atom in relation to 1/12 the relative atomic mass of an atom of carbon 12

Question 2

What is relative molecular mass (Mr)?

Answer 2

The average mass of a molecule compare to 1/12 the relative atomic mass of an atom of carbon 12

Question 3

What is a mole?

Answer 3

The amount of substance that contains 6.-22*10^23 particles which is the same number of atoms that’s in one gram hydrogen

Question 4

How do you work out moles?

Answer 4

moles (n) = Mass (g)/ Mass of one mole (Mr)