3.2: Use of amount of substance in relation to masses of pure substances

Question 1

What is a mole? (1)

Answer 1

Chemical​ ​amounts​ ​are​ ​measured​ ​in​ ​moles.​ ​The​ ​symbol​ ​for​ ​the​ ​unit​ ​mole​ ​is​ ​mol.

You​ ​can​ ​convert​ ​between​ ​moles​ ​and​ ​grams​ ​by using​ the​ ​equation:​ ​mass​ ​=​ ​moles​ ​x molar​ ​mass

Question 1

What is a mole? (2)

Answer 1

One​ ​mole​ ​of​ ​a​ ​substance​ ​contains​ ​the​ ​same number​ ​of​ ​the​ ​stated​ ​particles,​ ​atoms,​ ​molecules or​ ​ions​ ​as​ ​one​ ​mole​ ​of​ ​any​ ​other​ ​substance

The​ ​mass​ ​of​ ​one​ ​mole​ ​of​ ​a​ ​substance​ ​in​ ​grams​ ​is​ ​numerically​ ​equal​ ​to​ ​its
relative​ ​formula​ ​mass.