In an experiment 3.1 gram of Phosphorous reacts with 24 grams of Bromine to form Phosphorous Bromide. Calculate the empirical formulae of Phosphorous Bromide. The relative atomic mass of Phosphorous is 31 and Bromine is 80.

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.