Ineed figuring out this equation. i know you have to use stoichiometry. i just dont understand how to do it. calculate the mass of o2 produced if 3.450g potassium chlorate is completely decomposed by heating in the presence of a catalyst (manganese dioxide).

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.