Write an equation for the formation of each compound from its elements in their standard states , and find Hrxn for each from Appendix IIB . a. NO2(g) b. MgCO3(s) c. C2H4(g) d. CH3OH(l)

Why does ammonia, nh3, behave as a base when it reacts with an acid? z

Which of the following is an example of how telecommunication devices people do their jobs? a.) a security guard checks the time using a digital watch. b.) a banker does some quick math using a solar calculator. c.) a nurse uses a digital thermometer to take a patient’s temperature. d.) a construction worker reports in to his office using a cell phone.

Match each term to its description. match term definition excess reactant a) reactant that can produce a lesser amount of the product limiting reactant b) amount of product predicted to be produced by the given reactants theoretical yield c) reactant that can produce more of the product