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expeople1 [14]
3 years ago
15

An electron in a hydrogen atom moves from level 1 to level 4. The electron then drops from level 4 to level 2. Which statement d

escribes the most likely result?
Chemistry
2 answers:
Step2247 [10]3 years ago
5 0
It would be B. In the first move energy was absorbed, because when energy is gained an electron moves to a higher energy level. In the second move energy was released because that is how an atom moves to a lower energy level.  The jump from level 1 to  4 was bigger than the drop from 4 to 2, because in the first move it moved from more orbitals.
Misha Larkins [42]3 years ago
5 0

Answer:

B

Explanation:

The energy absorbed in the first move is greater than the energy released in the second move.

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Pure silver has a brilliant white metallic luster. How many moles of silver, Ag, are in 7.54 × 1023 atoms of silver?
AleksAgata [21]

The number of moles of silver, Ag, that are in 7.54 × 10²³ atoms of silver is 1.25 moles

From the question,

We are to determine the number of moles of silver, Ag, that are present in 7.54 × 10²³ atoms of silver

From the formula

Number\ of\ moles  =\frac{Number\ of\ atoms}{Avogadro's\ constant}

Avogadro's  constant = 6.022 × 10²³  atoms mol⁻¹

and

From the given information

Number of silver atoms = 7.54 × 10²³ atoms

Putting the parameters into the formula, we get

Number of moles of silver present = \frac{7.54\times 10^{23} }{6.022\times 10^{23}}

Number of moles of silver present = 1.2520757 moles

Number of moles of silver present ≅ 1.25 moles

Hence, the number of moles of silver, Ag, that are in 7.54 × 10²³ atoms of silver is 1.25 moles

Learn more on calculating number of moles here: brainly.com/question/15839520

7 0
2 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
An isolated insulated cylinder contains 15.40 grams of neon gas and a 62.30-gram bronze medal in thermal contact. When the bronz
Katen [24]

Answer:

its 57.56

Explanation:

dont ask me how it is just is trust me

5 0
3 years ago
Nguyên tố A có cấu hình electron phân lớp cuối cùng là 4p3. A phải
Studentka2010 [4]

Answer: ?

Explanation: I translated this and It makes no sense.

Tôi đã dịch điều này và nó không có ý nghĩa.

4 0
3 years ago
Write an equation that shows the formation of a chromium(ii) ion from a neutral chromium atom.
daser333 [38]
The   equation  that  shows  the  formation  of  chromium (ii) ion  from  neutral  chromium  atom  is  as  follow
Cr ---> cr^2+   +  2e-
Cr^2+ is  the  chromium  ion   with  oxidation  state  of  two  which  is  one  of  the  common  ion  of  chromium.  Other  common  ion   of  chromium  include  chromium  of  oxidation  state  6  and  3

8 0
4 years ago
Read 2 more answers
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