1. the products of a combustion reaction do not include a. water b. carbon dioxide c. carbon monoxide d. hydogen 2. which of the following is a blanced equation representing the decomposition of lead(iv) oxide? a. pbo2 -> pb + 2o b. pbo2 -> pb + o2 c. pb2o -> 2pb + o d. pbo -> pb + o2

The equation below shows the reaction of zinc with hydrochloric acid (hcl). zn (s) + 2 hcl (aq) —> zncl2 (aq) + h2 (g) what will happen if the concentration of hcl is decreased? a. more zncl2 will be produced. b. the reaction rate will slow down. c. the hydrochloric acid will become more acidic. d. the reaction will produce water instead of hydrogen gas.