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nydimaria [60]
3 years ago
11

An x-ray beam with wavelength 0.170 nm is directed at a crystal. As the angle of incidence increases, you observe the first stro

ng interference maximum at an angle 62.5 ∘. What is the spacing d between the planes of the crystal?
Chemistry
1 answer:
xeze [42]3 years ago
3 0

The distance between the scattering planes in the crystal is d = 0.95 A°

<u>Explanation</u>:

The Bragg's equation is given by

                                      2d sinθ = nλ

where,

d is the distance between the scattering planes in the crystal.

θ is the angle of diffraction.

n is the order of diffraction.

λ is the wavelength of X rays.

Given λ = 0.17 nm = 1.7 A°, angle = 62.5

                          2 \times d \times sin(62.5)    = 1 \times 1.7 A°  

                                                    d = 0.95 A°  

The distance between the scattering planes in the crystal is d = 0.95 A°

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Answer:

It would increase the final quantity of products

Explanation:

According to the Le- Chatelier principle,

At equilibrium state when stress is applied to the system, the system will behave in such a way to nullify the stress.

The equilibrium can be disturb,

By changing the concentration

By changing the volume

By changing the pressure

By changing the temperature

Consider the following chemical reaction.

Chemical reaction:

2NO₂ ⇄ N₂O₄

In this reaction the equilibrium is disturb by increasing the concentration of reactant.

When the concentration of reactant is increased the system will proceed in forward direction in order to regain the equilibrium. Because when reactant concentration is high it means reaction is not on equilibrium state. As the concentration of NO₂ increased the reaction proceed in forward direction to regain the equilibrium state and more product is formed.

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3 years ago
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2 years ago
Which best explains what happens when an electron moves from an excited state to the ground state? The electron absorbs energy a
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B) A company president would like to offer a 4.00 L cylinder containing 500 g of chlorine in the new catalog. The cylinders you
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Answer:

43.1atm is the pressure using gas law and 27.2atm using Van der Waals Law.

Explanation:

Ideal gas law is:

PV = nRT

<em>Where P is pressure in atm</em>

<em>V is volume = 4.00L</em>

<em>n are moles of the gas (For chlorine Molar Mass: 70.90g/mol):</em>

<em>500g * (1mol / 70.90g) = 7.052 moles</em>

<em>R is gas constant = 0.082atmL/molK</em>

<em>T is absolute temperature = 25°C + 273 = 298K</em>

To solve the pressure, P:

P = nRT/V

P = 7.052mol*0.082atmL/molK*298K / 4.00L

P = 43.1atm is the pressure using gas law.

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P + a(\frac{n}{V})^2 * (V-nb) = nRT

<em>Where a is 6.58L²atm*mol⁻²</em>

<em>b = 0.056Lmol⁻²</em>

Solving for pressure:

P + a(\frac{n}{V})^2 = \frac{nRT}{(V-nb)}

P  = \frac{nRT}{(V-nb)}-a(\frac{n}{V})^2

P  = \frac{7.052mol*0.082atmL/molK*298K}{(4.00L-7.052mol*0.056L*mol)}-6.58L^2mol^{-2}(\frac{7.052mol}{4.00L})^2

P = 172.323 / 3.6051 - 20.4866

P = 27.2atm using Van der Waals Law

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