How many molecules are contained in 0.500 moles of hydrogen gas?

A.

1.20 x 1024 molecules

B.

6.02 x 10-23 molecules

C.

3.01 x 10-23 molecules

D.

3.01 x 1023 molecules

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.