Necesito un ejemplo de la vida cotidiana o algo simple donde se vea una reaccion quimica de cada uno de estos tipos sintesis
descomposicion
desplazamiento
doble desplazamiento

Modern pennies are composed of zinc coated with copper. a student determines the mass of a penny to be 2.482 g and then makes several scratches in the copper coaling (to expose the underlying zinc). the student puts the scratched penny in hydrochloric acid, where the following reaction occurs between the zinc and the hcl (the copper remains undissolved): zn(s) + 2 hcl(aq) → h2(g) + zncl(aq)the student collects the hydrogen produced over water at 25 °c. the collected gas occupies a volume of 0.899 l at a total pressure of 79 j mmhg. calculate the percent zinc (by mass) in the penny. (assume that all the zn in the penny dissolves.)

What is the chemical name of the compound ti2o3? use the list of polyatomic ions and the periodic table to you answer.

The temperature of a lead fishing weight rises from 26 °c to 38 °c as it absorbs 11.3 j of heat. what is the mass of the fishing weight in grams?