In the drawing above, the distance from the ground to the floor of the trailer is 30 inches. The length of the ramp is 60 inches. What is
the mechanical advantage of this simple machine?
A. 30
B. 112
C. 2
D. 113

Which of these conditions most likely produces an unstable isotope?

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.

Calculate the concentration of all species in a 0.165 m solution of h2co3.