Find the density of a substance whose volume is 5 cm^3 and whose mass is 25 g.

Which statement justifies that phosphine (ph3) is a polar molecule?

The point along a planet's orbit where it is closest to the sun is called the

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.