3 years ago

Please help thanks very much extra points given

Chemistry

2 answers:

Zepler [3.9K]3 years ago

4 0

Because paper cannot withstand water. not any type of paper. plus it also states that it can hold up to 8 mL of water

V125BC [204]3 years ago

4 0

It is the strongest and most absorbent brand

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jenyasd209 [6]

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The pKa of the α‑carboxyl group of serine is 2.21 , and the pKa of its α‑amino group is 9.15 . Calculate the average net charge

sleet_krkn [62]

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Net charge in serine at pH equal to 8.30 is "0"

Explanation:

At pH > $pK_{a}$ , carboxyl group exists as $-CO_{2}^{-}$ (charged)

At pH < $pK_{a}$ , carboxyl group exists as -COOH (neutral)
At pH > $pK_{a}$ , amino group exists as $-NH_{2}$ (neutral)
At pH < $pK_{a}$ , amino group exists as $-NH_{3}^{+}$ (charged)
So, at pH = 8.30, both carboxyl and amino group exists in charged state.
Net charge in serine at pH equal to 8.30 is "0".
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3 years ago

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3 years ago

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3 years ago

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