Which of these groups includes organisms that are most closely related? a) class b) family c) genus d) species

Calculate the molar mass of aluminum oxide (al2o3). express your answer to four significant figures.

Identify the lewis base in this balanced equation: fe3+ h2o fe(h2o)63+

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.