For the diprotic weak acid H2A, Ka1=3.3×10−6 and Ka2=6.8×10−9 . What is the pH of a 0.0400 M solution of H2A ?

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

what is the question here. i think you messed up.

you need to have a picture of the atom that way we can answer it

idk i'm not smart

explanation:

t h