Year 12 Quantitative Chemistry
Molar Mass Race
A cooperative/competitive activity
NaBr
NaBr
NaBr
NaBr
NaBr
P2O5
P2O5
P2O5
P2O5
P2O5
Calcium sulfate
Calcium sulfate
Calcium sulfate
Calcium sulfate
Calcium sulfate
Sodium oxide
Sodium oxide
Sodium oxide
Sodium oxide
Sodium oxide
Calcium
carbonate
Calcium
carbonate
Calcium
carbonate
Calcium
carbonate
Calcium
carbonate
Lead hydroxide
Lead hydroxide
Lead hydroxide
Lead hydroxide
Lead hydroxide
(NH4)3PO4
(NH4)3PO4
(NH4)3PO4
(NH4)3PO4
(NH4)3PO4
Teacher’s Instructions
Make one or two copies of this page depending on class size.
Cut into vertical strips.
Give each team a strip.
Have a list of the answers ready!
RULES:
 In groups of 3, 4 or 5.
 Calculate the molar mass of each compound in turn – bring your answer to me.
 I will only accept one answer at a time – and I will not accept any subsequent
answers until the one you are on is correct. Between correct answers you must
run around the room to your desk (to make the distance fair for all.)
 I will only say “yes” or “no” regarding your answer
 The first team to finish the race wins!