Describe the body form of a sponge. A sponge is closed at the bottom and open at the top.
A sponge is open at the bottom and closed at the top.

The chart shows the bid provided by four contractors to complete a job. which contractor is the most cost-effective?

Which are forms of frozen water? check all that apply. dew frost hail rain sleet

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.