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QUESTION
What is the correct chemical formula for carbonic acid?
##H_2CO_3##
Carbonate (##CO_3##) has a charge of ##-2## and ##H## has a charge of ##+1## therefore two ##H## ions are required and one ##CO_3## polyatomic ion is required to make the substance balanced.
This is why the formula is ##H_2CO_3##.
