Ammonia gas occupies a volume of 57.9 L at a pressure of 532.4 atm. If the pressure were lowered to 256.8 atm, what would the new volume be

Use the periodic table to determine the electron configuration of dysprosium (dy) and americium (am) in noble-gas notation.

Answer asap need to be answered 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.

Ab c or d ? i’m not sure what the answer is