1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Jobisdone [24]
3 years ago
12

Given that diatomic chlorine is the most stable form of the element, and that the ΔHf° value for atomic chlorine is +121.7 kJ/mo

l, calculate the maximum wavelength that can dissociate diatomic chlorine into monoatomic chlorine. What type of radiation (UV-A, UV-B, UV-C) does this wavelength correspond to?
Chemistry
1 answer:
Alenkinab [10]3 years ago
4 0

Answer:

The maximum wavelength of light that can dissociate diatomic chlorine into the monatomic chlorine form is 984 nm.

Explanation:

Given: ΔHf° value for atomic chlorine is +121.7 kJ/mol

1 Step

Converting kJ/mol into kJ (knowing that in 1 mol there is 6.023*10^23 molecules)  

ΔHf° in kJ = 121.7 kJ/mol* 1 mole / 6.023*10^23

ΔHf° = 2.02*10^-22 kJ

ΔHf° = E = 2.02*10^-19 J

2 Step

Converting ΔHf° to a wavelength:

knowing the E = h*C/У

h = 6.626 x 10^-34 J·s

C = 3.00 x 10^8 m/s

У = h*C/E = (6.63 x 10^-34 J·s)(3.00 x 108 m/s) / 2.02*10^-19 J

У = 9.84*10^-7 m = 984 nm

3 Step (What type of radiation?)

UV-A wavelength range = 315 nm to 400 nm

UV-B wavelength range = 280 nm to 315 nm

UV-C wavelength range = 100 nm to 280 nm

This wavelength is not corresponding to any of the wavelength range (UV-A, UV-B, UV-C).

You might be interested in
5. An example of a muscle that is voluntarily controlled is a muscle that
Shtirlitz [24]

Answer:

A, Makes the leg move

Explanation:

6 0
2 years ago
If a force of 1.4N is applied to a block with a mass of 7kg, what is the acceleration of the block in meters per second squared?
Anton [14]

Answer:

<h2>0.2 m/s²</h2>

Explanation:

The acceleration of an object given it's mass and the force acting on it can be found by using the formula

a =  \frac{f}{m}  \\

f is the force

m is the mass

From the question we have

a =  \frac{1.4}{7} =  \frac{1}{5}   \\

We have the final answer as

<h3>0.2 m/s²</h3>

Hope this helps you

5 0
2 years ago
Read 2 more answers
One atom of silicon can properly be combined in a compound with
aev [14]
B. two atoms of oxygen
3 0
3 years ago
A 118-ml flask is evacuated and found to have a mass of 97.129 g. when the flask is filled with 768 torr of helium gas at 35 ?c,
Inessa05 [86]
The full question asks to decide whether the gas was a specific gas. That part is missing in your question. You need to decide whether the gas in the flask is pure helium.

To decide it you can find the molar mass of the gas in the flask, using the ideal gas equation pV = nRT, and then compare with the molar mass of the He.

From pV = nRT you can find n, after that using the mass of gass in the flask you use MM = mass/moles.

1) From pV = nRT, n = pV / RT

Data:
V = 118 ml = 0.118 liter
R = 0.082 atm*liter/mol*K
p = 768 torr * 1 atm / 760 torr = 1.0105 atm
T = 35 + 273.15 = 308.15 K

n = 1.015 atm * 0.118 liter / [ 0.082 atm*liter/K*mol  * 308.15K] =0.00472 mol

mass of gas = mass of the fask with the gas - mass of the flasl evacuated = 97.171 g - 97.129 g = 0.042

=> MM =  mass/n = 0.042 / 0.00472 = 8.90 g/mol

Now from a periodic table or a table you get that the molar mass of He is 4g/mol

So the numbers say that this gas is not pure helium , because its molar mass is more than double of the molar mass of helium gas.
7 0
3 years ago
Iron has a mass of 7.87 g per cubic centimeter of volume, and the mass of an iron atom is 9.27 × 10-26 kg. If you simplify and t
Talja [164]
<span>(a) what is the average volume (in cubic meters) required for each iron atom
For this case, the density of Iron would be </span>7.87g/cm³
<span>
V = 9.27 x 10^-26 kg / </span>7.87g/cm<span>³ ( 1 kg / 1000 g)
</span>V = 1.18 x 10-23 cm³<span>

(b) what is the distance (in meters) between the centers of adjacent atoms?
We assume the atoms as cube, so we use the volume of the cube to calculate the distance of the atoms.

V = </span>1.18 x 10-23 cm<span>³ = s</span>³
s = 2.28 x 10^-8 cm
7 0
2 years ago
Read 2 more answers
Other questions:
  • Imagine you pour some hot soup into a bowl. You place you hands on the outside of the bowl and feel that that the bowl is very w
    10·2 answers
  • Consider the reaction pathway graph below.
    11·2 answers
  • Which of the following are chemicals? (1) clothing (2)food (3)fuels (4)all of the above
    14·2 answers
  • Which is true of a mechanical wave? (Hurry up please, do quick)
    11·1 answer
  • Which best describes the flow of the gulf stream? A. southwest B. northeast C. southeast D. northwest
    14·2 answers
  • What kind of change is burning paper​
    10·2 answers
  • Someone please help me
    9·1 answer
  • The function of the cell wall is to
    5·2 answers
  • When an atom of Calcium (Ca) bonds with an atom of Oxygen (O), the Calcium atom will have which ionic charge?
    14·1 answer
  • A saturated solution of Al(OH)3 has a molar solubility of2.9x J0-9 Mat a certain temperature. What is the solubility product con
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!