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Volgvan
3 years ago
10

what is the wavelength of a photon emitted when an electron jumps from n=2 to n= 1 energy level of a single ionized helium atom

?​
Chemistry
1 answer:
Neko [114]3 years ago
7 0

Answer:

I hope it help you the wavelength is 1.9130E-28

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The colision of two plates causes the fomation of _____<br> mountain
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The collision of two plates causes the formation of fold mountains.
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Which of the following on the periodic table corresponds to a principal energy level?
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Write the equilibrium reaction for (CH3)3N acting as a weak base in water. Be sure to include the phase labels for practice. The
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<u>Answer:</u> The equilibrium reaction of trimethylamine with water is written below.

<u>Explanation:</u>

According to the Bronsted-Lowry conjugate acid-base theory:

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  • A base is defined as a substance which accepts protons and thus forming conjugate acid.

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(CH_3)_3N(aq.)+H_2O(l)\rightleftharpoons (CH_3)_3NH^+(aq.)+OH^-(aq.)

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4 years ago
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3 years ago
How long will it take for the concentration of A to decrease from 0.850 M to 0.205 for the reaction A → Products? (k = 0.0882 M⁻
Delicious77 [7]

Answer:

16.1 s

Explanation:

The reaction,  A → Products, follows first order kinetics.

So,

ln[A] = ln[A]o - kt

Where;

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[A]o = initial concentration

k= rate constant

t = time taken

ln(0.205) = ln(0.850) - 0.0882t

ln(0.205) -  ln(0.850) = - 0.0882t

-1.5847 - (-0.1625) = - 0.0882t

-1.5847 + 0.1625 = - 0.0882t

-1.4222 = - 0.0882t

t = -1.4222/- 0.0882

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