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ahrayia [7]
4 years ago
14

Using the particle-in-the-box model for the hydrogen atom and treating the atom as an electron in a one-dimensional box of lengt

h 150. pm, predict the wavelength of radiation emitted when the electron falls from the level with n 3 to that with n 2

Chemistry
1 answer:
Levart [38]4 years ago
8 0
The model has resulted into a formula called the Rydberg formula. It also came about from the electron transfer within the hydrogen atom. The formula is shown in the picture, where RH is the Rydberg constant and λ is the wavelength . Thus, the solution is as follows:

1/λ = (1.0973731×10⁷ m⁻¹)(1/2² - 1/3²)
Solving for λ,
<em>λ = 6.56×10⁻⁷ m</em>


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Some sugar is added to cold water in a beaker.
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3 years ago
How many significant figures are in the measurement 81,140 grams
GrogVix [38]
Answer:

5

Explanation:

In order to be able to say how many sig figs are used for the measurement 811.40 g, you need to know that

<span><span>non-zero digits are always significant</span><span>a trailing zero that follows a decimal point and a non-zero digit is always significant</span></span>

In your case, the measurement

<span>811.40</span>

has four non-zero digits and one significant trailing zero.

<span><span><span>8,1,1,4</span>→</span> non-zero digits<span><span>8,1,1,</span>0→</span> significant trailing zero</span>

Therefore, you can say that this measurement has <span>five significant figures</span>

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8 0
3 years ago
Draw a structural formula of an alkene or alkenes (if more than one) that undergo acid-catalyzed hydration and without rearrange
AfilCa [17]
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3 0
3 years ago
You have a total body concentration of 300 mOsM and total body volume of 3 liters. If you add 0.5 L of a solution containing 150
Archy [21]

Answer:

The new total body concentration would be 300 mOsM

Explanation:

In order to do this, we need to convert all concentrations to moles.

First, with the total body concentration, we have the initial volume of 3 liters and the concentration of 300 M (I will omit til the end the part of mOs)

The moles of the body concentration in this volume is:

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To this moles, we add 150 moles of NaCL so, the total moles now is:

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Finally, we can calculate the concentration with the new volume of 3.5 L (the sum of 3 and 0.5 liters added):

M = 1050 / 3.5

<em>M = 300 mOsM</em>

<em>So the concentration remains the same as initial</em>

5 0
3 years ago
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