Could Someone tell me what the equations are to this?

Question

Carbonic Acid: _____ + _____ -> __________

Carbonate Rock: _____ + _____ -> __________

Fossil Fuel Combustion:

_________ + _________ ->________ +________

Please fill in the blanks with the right equation. Thank you!

Answer 1

H2O + CO2 ->H2CO3 : Carbonic Acid

I don't think there is a equation for carbonate rock because it is a class for the Sedimentary rock. ( The first link is for this )

What kind of fossil fuel is this? ( Look at the second link )

I hope this information can be useful. Sorry.