Which of the two Lewis/electron dot structure representations, which is the correct one for phosphorus trifluoride? PICTURE BELOW

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.

A5.00 g of a in . g of at aa 5.00 g of b in . g of .?at .

Will a solution form when the solvent and solute are both nonpolar? a. not likely b. never c. most likely