Calculate the two principal molar heat capacities of oxygen if their ratio is 1.40. Density of oxygen at s. t.p = 1.43 kg m-3, one standard atmosphere = 1.01 x 105 Pa and molar mass of oxygen = 32.0 x 10-3 kg mol-1. (For 1 mole of an ideal gas, pV =RT).

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.