Calculate the pka value of the weakly basic aromatic amine in procaine from the data given below. Absorbance of a fixed concentration of procaine in 0.1M HCI at 296 nm = 0.031; absorbance in 0.1M NaOH = 1.363; absorbance in buffer at pH 2.6=0.837.​

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answer:

the answer is 6 valence electrons.

explanation:

valence is the # of electrons on the outer most shell of an atom.

oxygen has 6.

although, the valency of oxygen is 2, because it only needs to make 2 covalent bonds, or gain 2 electrons, to achieve the stable octet configuration of a noble gas.

that's it!

if you need further assistance, let me know: )

~ trueboss72

answer:

technetium is the most reactive. this is followed by silver. the least reactive out of these three elements is strontium.

level 4 to level 2 : ))