One step in making para-aminobenzoic acid, PABA, an ingredient in some sunscreens, involves replacing one of the hydrogen atoms in a toluene molecule (C7H8) with an NO2 group. Water is also formed. Calculate how many molecules of the nitrotoluene product you can make if you start with 550g of toluene and plenty of nitric acid.

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.