28 mL of 0.36 mol/L acetic acid is titrated with a standardized 0.43 mol/L KOH solution. Calculate the pH of the solution after 21 mL of the KOH solution has been added. Assume the Ka of acetic acids is 1.8 x 10^-5.

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.