Select the statement that best describes a buffer.
a. A buffer causes acidic solutions to become alkaline, and alkaline solutions to become acidic.
b. A buffer stabilizes the pH of a solution by preventing acids or bases from dissociating.
c. A buffer resists change in pH by accepting hydrogen ions when acids are added to the solution and donating hydrogen ions when bases are added.
d. A buffer prevents the pH of a solution from changing when an acid or base is added.
e. Buffered solutions are always neutral, with a pH of 7.

am i too late?

explanation:

a. the law of proportion states the combination of 2 atoms in a specific ratio to produce multiple compounds such as the given statement of question ‘1st compound contains 88.8 % cu ’ indicates 88.8 g of cu is present along with 11.2 g oxygen in 100 g of compound whereas the statement ‘2st compound contains 79.9 % cu ’ indicates 79.9 g of cu is present along with 20.1 g oxygen in 100 g of compound

1st compound contains 88.8 g cu

for cu

m = 63 g /mol

atomic % = 88.8 /63 = 1.42

for o

m = 16 g /mol

atomic % = 11.2 /16 = 0.7

b. the emperical formula of 1st compound is

cu1.4o0.7

cu2o