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VikaD [51]
3 years ago
10

In which of the following processes will delta S be negative? Select one from above

Chemistry
1 answer:
Alona [7]3 years ago
3 0

Answer:

CO2 (s) -->Co2 (g) will be the answer

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Biểu thức định luật Raoul là?
Dennis_Churaev [7]

Answer: Định luật Raoult là một định luật hóa học vật lý, với ý nghĩa trong nhiệt động lực học. Được thành lập bởi nhà hóa học người Pháp François-Marie Raoult vào năm 1887, nó nói rằng áp suất một phần của mỗi thành phần của một hỗn hợp chất lỏng lý tưởng bằng với áp suất hơi của thành phần tinh khiết nhân với phần nốt ruồi của nó trong hỗn hợp. Kết quả là, việc giảm áp suất hơi tương đối của dung dịch pha loãng của chất tan không lây bằng với phần nốt ruồi của chất tan trong dung dịch.

Explanation: hope this helps :)

5 0
3 years ago
Consider the following chemical reaction of bromothymol blue indicator. It appears yellow in undissociated form and blue in its
TiliK225 [7]

The addition of hydrogen carbonate to bromothymol blue turns the solution blue. Thus, option B is correct.

The balanced equation for the dissociation of bromothymol blue is:

\rm HC_2H_3O_2\;\leftrightharpoons H^+\;+\;C_2H_3O_2^-

The color of dissociated form is yellow and undissociated form is blue.

<h3>What is the final color of solution?</h3>

The addition of hydrogen carbonate results in the dissociated ions as:

\rm H_2CO_3\;\rightarrow\;2\;H^+\;+\;CO_3^-

The dissociation results in the increased hydrogen ion concentration. The undissociated form in the reaction mixture increases.

Thus, the color of the solution will turn blue. Hence, option B is correct.

Learn more about bromothymol blue, here:

brainly.com/question/24319054

6 0
3 years ago
Select the sentences in the paragraph that explain only the dark lines that are produced in the absorption spectra. Select all t
Nady [450]

Answer:

Gaps are produced in the light spectra that correspond to wavelengths of absorbed photons.

Explanation:

When electrons in atoms absorb energy, they move from a lower energy level to a higher energy level. With time, they revert to the their original energy state emitting a photon of light of appropriate wavelength.

The absorbed photons do not show up in the spectrum. They appear as dark lines in the spectrum. Hence, the absorption spectrum is the exact inverse of the emission spectrum. The  dark lines in the spectrum indicates that the colors that ought to occupied those points there have been absorbed.

5 0
3 years ago
Floor 19 is an isotope of fluorine It has different number of?—————
vitfil [10]
Try B, but i don’t know
5 0
3 years ago
What is the concentration of h+ ions in a solution of hydrochloric acid that was prepared by diluting 15.0 ml of concentrated (1
il63 [147K]
HCl is a monoprotic acid, which means that each mole of HCl releases one mole of hydrogen ions upon dissociation. Therefore, we calculate the moles of HCl present using:

Moles = Molarity * Volume (in liters)

Moles = 11.6 * 0.015
Moles = 0.174 moles of HCl = moles of H+ ions

Now, we use the same formula to calculate the molarity of the new solution, since the number of moles remains constant.

0.174 = M * 0.5
M = 0.348 M

The molarity of the new solution is 0.348
7 0
3 years ago
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