A beam of electrons (m= 9.11x10^-31 kg/electron) has an average speed of 1.3x10^8 m/s. What is the wavelength of electrons having this average speed, in picometers? a) 559 pm
b) 0.559 pm
c) 5.59x10^-12 pm
d) 5.59 pm

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.