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3 years ago

What three things happen to plates at the plate boundaries (where two or more plates come together)?

Chemistry

1 answer:

Sergio [31]3 years ago

7 0

Explanation:

a. A divergent plate boundary process takes place

b. A convergent plate boundary process takes place

c. A transform plate boundary process takes place

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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]

Answer:

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".
Structure of serine at pH equal to 8.30 has been shown below.

8 0

3 years ago

What is Keq for the reaction N₂ + 3H2 = 2NH3 if the equilibrium

hram777 [196]

The Keq for the reaction N₂ + 3H2 = 2NH3 if the equilibrium concentrations are Keq = 1.5. The correct option is D.

Keq is the ratio of the concentration of reactant to the concentration of the product.

The balanced equation is

N₂ + 3H₂ = 2NH₃

The equilibrium constant is $\rm \dfrac{[NH_3]^2}{[N_2]\; [H_2]^3}$

The given concentrations of the compounds have been:

Ammonia = 3 M

Nitrogen = 1 M

Hydrogen = 2 M

$\rm \dfrac{9}{1\times 8} = 1.5$

Thus, the correct option is D. Keq = 1.5.

Learn more about Keq

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3 0

2 years ago

Why do elements have different<br> properties?

Ann [662]

I think because each element has its own number of protons and neutrons, giving it its own atomic number and mass (correct me if I’m wrong please)

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3 years ago

Created from the ...... of ..... in layers over long periods of time

Setler79 [48]

Sedimentary rocks. Not sure though

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3 years ago

Which is the correct Lewis dot structure of NH2?<br><br> A.A<br> B.B<br> C.C<br> D.D<br> E.E

Anarel [89]

I think D is your answer

5 0

2 years ago

Read 2 more answers