Carbonic acid forms when carbon dioxide dissolves in water according to this equation:

Question

CO2+H2O =H2CO3
How many moles of CO2 must dissolve in an excess of water to produce 3 moles of H2CO3?

Answer 1

Everything is a one to one ratio.

1 mole needs 1 mole, 2 moles needs 2 moles, and 3 moles needs 3 moles.

3 moles.