Calculate the number of moles in the 2.1-l volume of air in the lungs of the average person. note that the air is at 37.0ºc (body temperature). use standard atmospheric pressure.

Write a hypothesis that answers the lesson question, “while observing a chemical reaction, how can you tell which reactant is limiting? ” hypothesis: if a substance is the limiting reactant, then . . because . .

Which statement correctly describes metallic bonds? a. they form when certain atoms lose electrons and other atoms gain electrons. b. they involve an attraction between anions and cations. they always involvpoth a metal and a nonmetal. d. they can only form between atoms of the same element. e. they form because electrons can move freely between atoms.

What does the mass of 0.7891 mol of ferric oxide (fe2o3)