What type of reaction occurs when H+ (aq) reacts with OH- (aq)

What is the formula for calcium iodide

An atom of which element reacts with an atom of hydrogen to form a bond with the greatest degree of polarity ?

The activation energy for the reaction no2(g)+co2(g)⟶no(g)+co(g) is ea = 300 kj/mol and the change in enthalpy for the reaction is δh = -100 kj/mol . what is the activation energy for the reverse reaction?