Carbonic acid (H2CO3) forms when carbon dioxide (CO2) dissolves in water according to this equation:
CO2 + H2O
H2CO3
How many moles of CO2 must dissolve in excess water to produce 12 moles of
H2CO3?
Enter your answer as a number only; no units.

2fe + 3h2so4 -> fe2(so4)3 + 3h2

it is necessary to balance equations in order to get the proper amount of reactants as well as products in order not to make a miscalculation.

you cannot change the subscripts as that would change the substance itself. for instance, diatomic elements such as h2 only have the subscript two when a gas. another example would be so4, if you were to change the subscript, the element would no longer be sulfate.

we change the coefficients instead as that only changes the number of molecules rather than the substance itself.

hope this !

- lead + phosphoric acid = hydrogen + lead(ii) phosphate

c. is the answer

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