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3 years ago

The pictures below show water in a glass and oil in a beaker.

Chemistry

2 answers:

ryzh [129]3 years ago

7 0

Answer:

Explanation:

Archy [21]3 years ago

3 0

Answer: is letter D. Because minerals are solid.

Explanation:

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Why do you think most lampshades are made of translucent materials instead of transparent materials?

Gala2k [10]

Explanation:

because translucent shades lets the light through easily (gentle diffusion)

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1 year ago

The liter is used to measure _____. weight mass volume length

Ket [755]

the answer to your question is

volume

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3 years ago

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Plz help me with this pt.3

hichkok12 [17]

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I think the answer is

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2 years ago

Select all that apply.

kap26 [50]

I think it is A and C!

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2 years ago

The activation energy for proline isomerization of a peptide depends on the identity of the preceding residue and obeys Arrheniu

MAVERICK [17]

Answer:

Activation energy of phenylalanine-proline peptide is 66 kJ/mol.

Explanation:

According to Arrhenius equation- $k=Ae^{\frac{-E_{a}}{RT}}$ , where k is rate constant, A is pre-exponential factor, $E_{a}$ is activation energy, R is gas constant and T is temperature in kelvin scale.

As A is identical for both peptide therefore-

$\frac{k_{ala-pro}}{k_{phe-pro}}=e^\frac{[E_{a}^{phe-pro}-E_{a}^{ala-pro}]}{RT}$

Here $\frac{k_{ala-pro}}{k_{phe-pro}}=\frac{0.05}{0.005}$ , T = 298 K , R = 8.314 J/(mol.K) and $E_{a}^{ala-pro}=60kJ/mol$

So, $\frac{0.05}{0.005}=e^{\frac{[E_{a}^{phe-pro}-(60000J/mol)]}{8.314J.mol^{-1}.K^{-1}\times 298K}}$

$\Rightarrow$ $E_{a}^{phe-pro}=65705J/mol=66kJ/mol$ (rounded off to two significant digit)

So, activation energy of phenylalanine-proline peptide is 66 kJ/mol

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2 years ago