Which best describes is the ∆g, ∆h, ∆s and t of a forest fire?
∆g=negative, ∆h= positive, ∆s= positive, t = large
∆g=positive, ∆h= positive, ∆s= positive, t = large
∆g=negative, ∆h= negative, ∆s= positive, t = large
∆g=negative, ∆h= positive, ∆s= negative, t = large
∆g=positive, ∆h= positive, ∆s= negative, t = large

Which of the following elements is a representative element? a. chromium (cr) b. aluminum (al) c. mercury (hg) d. silver (ag)

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.

Aman applies a force of 500n to push a truck 100m down the street how much does he do?