Check all statements below that ar true.
heating air under the balloon will cause the
air inside to expand.
the air inside will have the same mass but
more volume.
heating the air under the balloon will cause
the entire balloon to rise.
the outside temperature will have no affect
on the height of the balloon.
the only way to make the balloon sink is to
let out the air.

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.