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
Kamila [148]
3 years ago
11

How much energy does an X-ray with an 8 nm (8 x 10-9m) wavelength have?

Chemistry
1 answer:
myrzilka [38]3 years ago
3 0

Answer:

it would be option C

Explanation:

Speed of light = 3×10^8m/s

Planck's constant = 6.626×10^-34 Js

Wavelength = 8 x 10^-9 m

Energy = [(3×10^8) * (6.626×10^-34)] / 8 x 10^-9

Energy = [19.878×10^(8-34)] / 8 x 10^-9

Energy = 2.48475 × 10^(-26+9)

Energy = 2.48×10^-17 J

You might be interested in
Two gases have the same temperature but different pressures. The kinetic-molecular theory does not predict that a. molecules in
olganol [36]

Answer: Option (c) is the correct answer.

Explanation:

Kinetic molecular theory states that particles of a matter are continuously in motion and these molecules represent perfect elastic collision.

So, at the same temperature but different pressures the two gases will have all collisions of the molecules as elastic in nature. It is also possible that molecules in both gases have the same average kinetic energies under given conditions as their molecules might be moving with the same speed.

But we cannot determine the densities of these gases.

Thus, we can conclude that the kinetic-molecular theory does not predict that both gases have the same densities.

8 0
3 years ago
How do we determine the central atom in a chemical bond? How information is need to determine the shape that results in the bond
EastWind [94]

Answer:

- the central atom is usually the atom with the lowest subscript in the molecular formula and the atom that can form the most bonds. If all of the atoms usually form the same number of bonds, the least electronegative atom is usually the central atom.

- molecular shape (the shape that a single molecule has) is important in determining how the molecule interacts and reacts with other molecules. Molecular shape also influences the boiling point and melting point of molecules. If all molecules were linear then life as we know it would not exist.

7 0
3 years ago
For the balanced equation shown below, how many moles of O2 will react with 0.3020 moles of CO2?
andrezito [222]
Answer is: 0,453 <span> moles of oxygen will react </span><span>with 0.3020 moles of carbon(IV) oxide</span><span>.
</span>n(CO₂) = 0,302 mol.
From chemical reaction: n(CO₂) : n(O₂) = 4 : 6.
n(O₂) = 6 · 0,302 mol ÷ 4.
n(O₂) = 0,453 mol.
n - amount of substance.
6 0
3 years ago
Read 2 more answers
How many moles of nitric acid are present in 35.0 ml of a 2.20 M solution?
vodomira [7]

Answer:

There are 77 millimoles of nitric acid present in 35.0 mL of a 2.20 M solution

Explanation:

Molarity of the solution = 2.20 M

Molarity=\frac{number\:of\:moles}{Volume\:of\:Solution\:in\:L}\\\\Number\:of\:moles=Molarity\times(Volume\:of\:Solution\:in\:L)\\\\Volume\:of\:Solution=35\:mL=35\times10^{-3}L\\\\Number\:of\:moles=2.20\times35\times10^{-3}=77\times10^{-3}\:moles\:of\:HNO_{3}

Therefore, there are 77 millimoles of nitric acid present in 35.0 mL of a 2.20 M solution

8 0
3 years ago
Give one example of an element and one compound.<br><br> Can someone help me with this pls
Mrac [35]

Element: Helium, Oxygen

Compound: H2O, CO2

3 0
3 years ago
Other questions:
  • when a large object fell into a "full" swimming pool, it displaced 35.1 gallons of water. The density of the object is 1.65 g/mL
    8·1 answer
  • Which of the following would you expect to cause the evolution of a gas when added to hydrogen peroxide? a. A piece of raw carro
    8·1 answer
  • What mean hoax and thanks ❤❤❤​
    15·2 answers
  • You burn 270 grams of glucose during respiration. How
    14·1 answer
  • What are three ways a fire Extinguisher can put out a fire?
    11·1 answer
  • Hydrogen bonds can be found between molecules of which substance? NH3 H2 HI CH4
    6·1 answer
  • In the balanced chemical equation for the formation of ammonia (NH3) from
    12·1 answer
  • HELP!! PLEASE 10+ points!
    10·1 answer
  • What property of water is primary for living organisms? (SC.6.E.7.4) *
    13·2 answers
  • A food web is a diagram that shows how different food chains connect. true or false​
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!