Question

How many moles of carbon dioxide is formed when 4.0 moles of carbonic acid decomposes (water is the other product)?

Answer 1

`4.0` mol `"CO"_2`

Explanation:

The chemical equation for this reaction is

`"H"_2"CO"_3"(aq)" rightleftharpoons "CO"_2"(g)" + "H"_2"O(l)"`

You'll notice that all the reagents in this reaction have equal amounts of relative moles, so if `4.0` moles of `H_2CO_3` decomposes completely, there will be `4.0` moles of each water and carbon dioxide produced.

Answer 2

Four (4).

Explanation:

Carbonic acid is a chemical compound with the chemical formula `H_2CO_3`.
Thus, each mole of carbonic acid can only produce one mole of carbon dioxide because there is only one mole of carbon per mole of carbonic acid.