NOTE: Unlike real life, you will have to put a '1' in the box if it needs it.
When you think it is balanced, click on the 'Balanced' button on the right.
Question 1 of 11
How to play
the game
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Fe
+
S
FeS
Fe
S
Fe-S
Fe
S
Fe-S
Fe
S
Fe-S
Fe
S
Fe-S
Fe
S
Fe-S
Fe
S
Fe-S
Fe
S
Fe-S