Identify the products and reactants involved and the type of chemical reaction shown below.

SO3 (g) + H2O (l) → H2SO4 (aq)

The reactants and products involved in the chemical reaction are written on the left and right hand side of the equation, respectively. Thus, the reactants are SO3 (g) and H2O (l). The product is H2SO4 (aq). This reaction is an example of synthesis wherein two reactant combine to form one product.