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lesantik [10]
3 years ago
11

A line in the lyman series of hydrogen has a wavelength of 122 nm. from what state did the electron originate?

Chemistry
1 answer:
ra1l [238]3 years ago
4 0
Lyman series is when the electron transitions from n≥2 to n=1. So, for the Lyman series, the Rydberg formula becomes

1/λ = R(1 - 1/n²)
where λ is the wavelength and R is the Rydberg constant for hydrogen (0.010972 nm⁻¹)

1/122 = 0.010972(1 - 1/n²)
Solving for n,
n = 1.988≈2

<em>Thus, the electron originated from the 2nd energy level.</em>
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Phosgene is a highly toxic gas made up of carbon, oxygen, and chlorine atoms. Its density at 1.05 atm and 258C is 4.24 g/L. (a)
VikaD [51]

Answer:

Molar mass = 99 g/mol

Explanation:

Phosgene contains carbon, oxygen and chlorine atoms. Its molecular formular is; COCl2

The molar mass is given as the sum off the individual atomic mass of the elements in the compound.

Molar mass = C + O + 2Cl

Molar mass = 12 + 16 + 2(35.5)

Molar mass = 99 g/mol

5 0
3 years ago
Mendeleev organized the elements:
pashok25 [27]

Answer: (3)

Medeleev arranged elements in order of increasing atomic weight and similar properties

He noticed that similar elements were grouped together by using this.

4 0
3 years ago
What is an atom?explain it plz.
Contact [7]
It is the smallest unit it is what makes up everything

joke-Don't trust Atoms they make up everything
6 0
3 years ago
A gas starts at a volume of 23 L and a pressure of 1.23 atm. What is the new pressure if you
Anna71 [15]

Answer:

<h2>1.89 atm</h2>

Explanation:

The new volume can be found by using the formula for Boyle's law which is

P_1V_1 = P_2V_2

Since we are finding the new volume

V_2 =  \frac{P_1V_1}{P_2}  \\

From the question we have

V_2 =  \frac{1.23 \times 23}{15}  =  \frac{28.29}{15}  \\  = 1.886

We have the final answer as

<h3>1.89 atm</h3>

Hope this helps you

7 0
2 years ago
When the isotonic saline solution described in part A is connected to an unknown solution via a semipermeable membrane, the unkn
ozzi

B. The unknown solution had the lower concentration.

Explanation:

Osmosis is a phenomenon in which the molecules of the solvent has a tendency to move through a membrane which is semipermeable from lower concentrated side to the higher concentration side, so that the concentrations on both sides of the membrane must be equal.

So the unknown solution may have lesser concentration than the isotonic solution so that molecules of that solution move from less concentrated side to the more concentrated side, so its level drops.

3 0
3 years ago
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