Hello I need ur guys help on my test its my last take opportunity and I did most of it but some im stumped on so please... put a real answer I only have 16 points left and its due tonight at 11:59pm and I have to go to bed in an HOUR HEELP ME PLZ

At 450 mm hg a gas has a volume of 760 l, what is its volume at standard pressure

Can someone me with 6 to 10 plz this is for masteries test.

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.