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:

Which fact represents evidence for the big bang theory?

How many molecules are in 6.0 moles of methane

What amount of heat is exchanged when 106.2 grams of substance y goes from a liquid at 35 degrees celsius to a solid at the same temperature? melting point of substance y = 35 degrees c; δhvaporization = 3.67 j/mol; δhfusion = 3.30 j/mol. mwsubstance y = 28.22 g/mol. −12.4 j −3.51 x 102 j 1.24 x 101 j 351 j