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boyakko [2]
3 years ago
9

Using Bohr's equation for the energy levels of the electron in the hydrogen atom, determine the energy (J) of an electron in the

n = 4 level?
Chemistry
1 answer:
padilas [110]3 years ago
8 0

Answer:

1.36x10^-19 J

Explanation:

First, we need to write the bohr's equation for the energy levels:

E(n) = -1/n² * 13.6 eV

Now, the question is asking this energy in Joules, so at the end we will use the conversion of eV to Joules.

As the energy level is 4, we just replace the value of n = 4 in the equation and solve for the energy in eV first:

E(4) = -1/4² * 13.6

E(4) = -0.85 eV

Now, the conversion for eV to Joules is the following:

1 eV = 1.6022x10^-19 J

Therefore, we just need to multiply the obtained value of Energy in eV with this factor, and we have the energy in Joules as required:

E = -0.85 * 1.6022x10^-19

E = 1.36x10^-19 J

This is the energy in Joules for an electron in the level 4.

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What atomic component contributes to many of the trends of elements
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Draw the structure of the bromohydrin formed when (Z)-3-hexene reacts with Br2/H2O. Use the wedge/hash bond tools to indicate st
Ipatiy [6.2K]

Answer:

(3R,4R)-4-bromohexan-3-ol

Explanation:

In this case, we have  reaction called <u>halohydrin formation</u>. This is a <u>markovnikov reaction</u> with <u>anti configuration</u>. Therefore the halogen in this case "Br" and the "OH" must have <u>different configurations</u>. Additionally, in this molecule both carbons have the <u>same substitution</u>, so the "OH" can go in any carbon.

Finally, in the product we will have <u>chiral carbons</u>, so we have to find the absolute configuration for each carbon. On carbon 3 we will have an "R" configuration on carbon 4 we will have also an "R" configuration. (See figure 1)

I hope it helps!

5 0
3 years ago
What volume of a 0.155 M potassium hydroxide solution is required to neutralize 25.7 mL of a 0.388 M hydrobromic acid solution
vekshin1

Answer: Therefore, the volume of a 0.155 M potassium hydroxide solution  is 56.0 ml

Explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per Liter of the solution.

According to the neutralization law,

n_1M_1V_1=n_2M_2V_2

where,

M_1 = molarity of HBr solution = 0.338 M

V_1 = volume of HBr solution = 25.7 ml

M_2 = molarity of KOH solution = 0.155 M

V_2 = volume of KOH solution = ?

n_1 = valency of HBr = 1

n_2 = valency of KOH = 1

1\times 0.338\times 25.7=1\times 0.155\times V_2

V_2=56.0ml

Therefore, the volume of a 0.155 M potassium hydroxide solution  is 56.0 ml

8 0
3 years ago
What is the chemical formula for the compound magnesium perchlorate? Use the list of polyatomic ions and the periodic table to h
8_murik_8 [283]

The chemical formula for the compound magnesium perchlorate is Mg(ClO₄)₂

Magnesium perchlorate or Mg(ClO₄)₂ is an ionic compound.

Perchlorate here is an anion which is represented by ClO₄⁻. Perchlorate is a polyatiomic anion, where one Cl atom is bonded to four O atoms.

The magnesium cation is represented by Mg²⁺

So one Mg²⁺ cation combines with two ClO₄⁻ anion to form one molecule of Mg(ClO₄)₂


6 0
3 years ago
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