During the work-up step, aqueous hydrochloric acid is added to the reaction and a gas is observed. What is the composition of the gas? A. Water
B. Carbon Dioxide
C. Hydrogen
D. Nitrogen
E. Ether

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.