suppose that you have amino acid with three dissociated group (α-carboxyl group; α-amino group and basic r-group), with the three pkas are 3, 9, 11 respectively).
a- draw the titration curve (indicate the pka clearly)
b- what is the pi:
c- what is the net charge at ph 6:

16

explanation:

the marks go by 4s

answer: any goods being imported from another country may be subject to issued by the federal government are tariffs

explanation:  

tariffs are a tax on anything that are imported from abroad. government use them to protect and boost their local industries and the thought is that they encourage consumers to buy local instead of importing and they will hope will protect jobs and economy in the country that implements them  

c. orbital shape i hope this is correct