When the equation below is balanced and all coefficients are in the lowest, whole number ratio, the coefficients are:

Bi + O2 �¨ Bi2O3

1 answer

2Bi + (3/2)O2 = Bi2O3
But we don't have 1/2-molecules, so double everything to get

4Bi + 3O2 = 2Bi2O3