PLEASE HELP WILL RATE THE BRAINLIEST Describe Thomson's "plum pudding" model of the atom, and then explain how the results of Rutherford's gold foil experiment resulted in a change to the atomic model. (3 points)

How many moles of air are there in a human lung with a volume of 2.4 l at stp? explain your answer

If 90.0 grams of ethane reacted with excess chlorine,how many grams of dicarbon hexachloride would form

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.