Natural gas, which is essentially methane, needs to be delivered to a redistributing station at a rate of 2.0 kmols/s and a pressure of 170 kpa. the pumping station is situated 160 km away and the pressure at the inlet to the line is 680 kpa. assuming the flow is isothermal at 22 °c and firiction factor is equal to 0.0027, determine the diameter of the pipe required. 1.003 m

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.