PLEASE SHOW WORK
1) You have a solution of acetic acid that has a K a of 3.5 × 10 –8 . If the concentration of the acetic acid were 2.40 M, what would be the concentration of H + at equilibrium?
2) You have a solution that is 1.75 M HCN. If the K a is 9.9 × 10 –8 , calculate the pH of the solution.
3) How many grams of KOH are needed to neutralize 35.0 mL of 1.8 M HCl?
4) How many mL of 2.20 M KOH are needed to neutralize 20.0 mL of 1.40 M HNO 3 ?

c. because step up transformer steps up the input voltage i.e increases the input voltage  

the number of turns are greater on the secondary side of step up transformer  

transformer does not handle dc current

a 20-cm-long, cylindrical graphite (pure carbon) rod is inserted into an oxidizing atmosphere at 1145 k and 1.013 x 105 pa pressure. the oxidizing process is limited by the diffu- sion of oxygen counterflow to the carbon monoxide that is formed on the cylindrical surface.

since electrons are negative the answer is neagtaive

it is b that is the answer.