An experiment similar to ours was completed by a group of 7th grade students there were 8 times recorded 7.48 7.45 7.90 7.37 7.25 7.40 7.55 7.60
the distance traveled was 30 meters
what was the average time of all the times recorded ?
what was the average velocity ?
if the mass was 432 grams what was the ke developed ?

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.