The acid HA has pKa = 4.00. Use Equations to find the fraction in the form HA and the fraction in the form A- at pH = 5.00. Does your answer agree with what you expect for the quotient [A-]/[HA] at pH 5.00?

Which type of orbits are found in the principal energy level n = 2 a - s b - s, f c - s, d d - s, p e - s, p, d

Electrons are extremely important to what area of technology? a) anti-aging research b) household product development c) electronics d) drug discovery

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.