What are the products of the chemical reaction that occurs when zinc metal is added to an aqueous solution of hydrochloric acid?

When hydrochloric acid reacts with potassium hydroxide solution, the following reaction occurs. hcl (aq) + koh (aq) h2o (l) + kcl (aq) the reaction gives off heat energy, so it is an reaction.

An object of mass 10.0 kg and volume 1000 ml and density 10 g/ml sinks in water who’s density is 1.0 g/ml. what is the mass of the water which has been displaced in kilograms

If a fast moving car making a loud noise approaches and moves past the person what will happen as the distance between the two increases?