Which equation represents a decomposition reaction?
(1) caco3(s) ==> cao(s) + co2(g)
(2) cu(s) + 2agno3(aq) ==> 2ag(s) + cu(no3)2(aq)
(3) 2h2(g) + o2(g) ==> 2h2o(l)
(4) koh(aq) + hcl(aq) ==> kcl(aq) + h2o(l)

Elements that do not have full outer electron shells will donate, share, or take electrons from other atoms. choose the items that have the correct binary ionic formula.

Which of the following is a physical property flammability heat of combustion solubility and toxicity

The graph indicates the running route for tobias. which best describes his run? from time 0 to 6, he went fast and then slowed down. from time 6 to 10, he was at his slowest. from time 12 to 14, he went very slow. from time 14 to 18, he went toward the starting point.