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
padilas [110]
3 years ago
7

X-ray photons with a wavelength of 0.135 nm . express the energy numerically in kilojoules per mole.

Chemistry
2 answers:
Novay_Z [31]3 years ago
8 0

Answer:

884.9×10^3 KJ mol-1

Explanation:

From E= hf

E= Energy of the photon

h= Plank's constant

f= frequency of the radiation

But f= c/λ

c= speed of light

λ= wavelength

Hence

E= hc/λ

E= 6.63×10^-34 × 3×10^8/135×10^-12

E= 147×10^-17 × 6.02×10^23

E= 884.9×10^3 KJ mol-1

STALIN [3.7K]3 years ago
7 0
Using E=hν where h is Planck's constant and v is the frequency of the photon. In the question above,the wavelenght is given so we can find the frequency of the photon using c=λν. c is a constant =3*10^8 so frequency is equal to
(3*10^8)/0.135*10^-9. Then use ur frequency in the eqn above using h 6.626*10^-34
You might be interested in
Explain two ways that bills penguin toy is similar to the water cycle
Alja [10]

All the water on the earth is the same water that has been here since

<h2><u><em>BRAINLIST </em></u></h2>
3 0
3 years ago
Melissa is interested in her family tree and how her family has changed over its many generations. Melissa probably more closely
tresset_1 [31]

Answer: A Confucian

Explanation:

In the year 2005, the Guinness Book of World Records recognized the Confucius genealogical line as the longest family tree in history. They have a record of 86 generations over 2,500 years. Confucius (551 to 479 BCE) is believed to have about 3 million descendants all over the world.

So the interest Melissa has in her family tree and also wanting to know how her family has changed over its many generations probably suggests that Melissa more closely resembles a Confucian.

6 0
3 years ago
Read 2 more answers
Determine the number of molecules in a 100. gram sample of CCl4
enyata [817]
100. g CCl4* (1 mol CCl4/ 153.8 g CCl4)* (6.02*10^23 CCl4 molecules/ 1 mol CCl4)= 3.91*10^23 CCl4 molecules.
(Note that the units cancel out so you get the answer)

Hope this helps~
8 0
3 years ago
explain why it is a common laboratory procedure to heat analytical reagents and store them in a dessicated atmosphere (a sealed
Readme [11.4K]

Explanation:

Most reagent forms are going to absorb water from the air; they're called "hygroscopic".  Water presence can have a drastic impact on the experiment being performed  For fact, it increases the reagent's molecular weight, meaning that anything involving a very specific molarity (the amount of molecules in the final solution) will not function properly.

Heating will help to eliminate water, although some chemicals don't react well to heat, so it shouldn't be used for all.  A dessicated environment is simply a means to  "dry."  That allows the reagent with little water in the air to attach with.

6 0
3 years ago
Is the bond C=O polar or non polar
rewona [7]

Answer:

Non Polar

Explanation:

Non Polar molecule because of its linear symmetric shape

6 0
3 years ago
Other questions:
  • What element behaves MOST like magnesium (Mg)?<br> A) S <br> B) Si <br> C) Sn <br> D) Sr
    14·2 answers
  • The specific heat of mercury is 380 j/kg/k. How much energy is required to raise the temperature of 42g of mercury from 25°C to
    5·1 answer
  • A permanent magnet can affect:
    6·1 answer
  • Why is photosynthesis so important to plants, and can't animals use it?
    10·2 answers
  • Question 1
    10·1 answer
  • A solution containing 8.3 g of a nonvolatile, nondissociating substance dissolved in 1.00 mol of chloroform, CHCl3, has a vapor
    10·1 answer
  • Answer the two questions by using the pictures, thanks!
    15·1 answer
  • What's the correct answer
    13·1 answer
  • 1. What is the frequency of the following:
    10·1 answer
  • Which compound in each pair is more soluble in water?(b) Calcium phosphate or magnesium phosphate
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!