5. What is the magnitude of the force that is exerted on a 15 kg mass to give it an acceleration of 5.0 m/s2?
a. 3N
b. 10 N
C.20 N
d. 75 N

What does the mass of 0.7891 mol of ferric oxide (fe2o3)

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.

What is the percentage of hydrogen in c2h4