CO2 + H20 - H2CO3 The reaction above is classified as
a combustion reaction
b double displacement
c synthesis
d decomposition
e single displacement

the correct answer is option A

in chemistry, a solution’s concentration is how much of a dissolvable substance, known as a solute, is mixed with another substance, called the solvent. the standard formula is c = m/v, where c is the concentration, m is the mass of the solute dissolved, and v is the total volume