Based on these data, what is the value of the formation constant, kf, of [cu(nh3)4]2+? [cu 2+ ]=6.47x10 -15 kf=

As changes in energy levels of electrons increase, the frequencies of atomic line spectra they emit

Answer asap need by wednesday morning explain how a buffer works, using an ethanoic acid/sodium ethanoate system including how the system resists changes in ph upon addition of a small amount of base and upon addition of a small amount of acid respectively. include the following calculations in your i. calculate the ph of a solution made by mixing 25cm3 0.1m ch3cooh and 40cm3 0.1m ch3coo-na+. [ka = 1.74 x 10-5 m] ii. calculate the ph following the addition of a 10cm3 portion of 0.08 m naoh to 500cm3 of this buffer solution. iii. calculate the ph following the addition of a 10cm3 portion of 0.08 m hcl to 200cm3 of the original buffer solution.

How many moles of no2 will form when 3.3 moles of cu are reacted with excess hno3?