How many moles of helium are needed to fill a balloon to a volume of 6.3 L at 28 °C and 320 mmHg?
Round answer to 0.01 decimals

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.