How to Balance Equations
2 Cu + 1 O2 2 CuO

Cu O-O Cu-O
Cu Cu-O
You can change the number of molecules by typing new numbers in front You cannot change the number of atoms in each molecule.
The object is to have the same number of each kind of atom on both sides.
Two Cu atoms
Two O atoms
Two Cu atoms
Two O atoms
Hint: Numbers must be in lowest terms. Ex. 1,2,1 is correct 2,4,2 or 3,6,3 is wrong.
When you have completed balancing the equation, press the Balanced button.

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