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QUESTION
What is the formula for lead (IV) oxide?
Pb##O_2##
For each ## Pb^(4+) ## we need two negative oxide ions ##O^(2-)## to balance out total positive and total negative charge.
The ratio of ## Pb^(4+) ## and ##O^(2-)## ios is 1:2 and hence the formula is Pb##O_2##.
