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
Leno4ka [110]
3 years ago
11

A photon with 2.3 eV of energy can eject an electron from potassium. What is the corresponding wavelength of this type of light?

Please answer in nm. 1 eV = 1.60 x 10-19 J Speed of light = 3.0 x 108 m/s Planck's constant = 6.626 x 10-34 Js socratic.
Chemistry
1 answer:
Ira Lisetskai [31]3 years ago
3 0

Answer:

\lambda=540.16\ nm

Explanation:

Given that:

The energy of the photon = 2.3 eV

Energy in eV can be converted to energy in J as:

1 eV = 1.60 × 10⁻¹⁹ J

So, Energy = 2.3\times 1.60\times 10^{-19}\ J=3.68\times 10^{-19}\ J

Considering

Energy=\frac {h\times c}{\lambda}

Where,  

h is Plank's constant having value 6.626\times 10^{-34}\ Js

c is the speed of light having value 3\times 10^8\ m/s

\lambda is the wavelength of the light being bombarded

Thus,  

3.68\times 10^{-19}=\frac {6.626\times 10^{-34}\times 3\times 10^8}{\lambda}

\frac{3.68}{10^{19}}=\frac{19.878}{10^{26}\lambda}

3.68\times \:10^{26}\lambda=1.9878\times 10^{20}

\lambda=5.40163\times 10^{-7}\ m=540.16\times 10^{-9}\ m

Also,  

1 m = 10⁻⁹ nm

So,  

\lambda=540.16\ nm

You might be interested in
If she suddenly dropped the books, this would increase their energy. If she instead decided to hold the books over her head, thi
Anna35 [415]

Answer:

the answer is is is true

7 0
3 years ago
How many significant digits in 0.23100
Reil [10]

Answer:

There are 5 significant digits in 0.23100.

Explanation:

This is because all non-zero digits are considered significant and zeros after decimal points are considered significant.

4 0
3 years ago
you are holding a bowling ball with a mass of 6 kg at a height of 1 meter. How much gravitational potential energy does the bowl
Bumek [7]

The formula for GPE is PE=mgh, where “m” is the mass of the object, “g” is the acceleration due to gravity (~9.8 m/s^2 on Earth’s surface), and “h” is the height of the object from the ground. Therefore,

PE=mgh

PE=(6 kg)(9.8 m/s^2)(1 m)

PE=58.8 kg•m^2/s^2 or 58.8 Newtons

The GPE of the bowling ball under these conditions would be about 59 Newtons.

Hope this helps!

7 0
4 years ago
Ethanol can react with hydrochloric acid to form chloroethane and water. When sulfuric acid is added, the
kaheart [24]

Answer: 1.Sulfuric acid is a catalyst

2. Vanadium(v) oxide is a catalyst

6 0
3 years ago
How many moles are there in 3.612 x 1024 formula units of Na2SO4?
vitfil [10]

Answer:

<h3>Theanswer is 6 moles</h3>

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

n =  \frac{N}{L}  \\

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

n =  \frac{3.612 \times  {10}^{24} }{6.02 \times  {10}^{23} }  \\

We have the final answer as

<h3>6 moles</h3>

Hope this helps you

5 0
3 years ago
Other questions:
  • The equilibrium constant for A + 2B → 3C is 2.1 * 10^-6
    15·1 answer
  • What are the reactants in the following chemical equation: Zn + CuSO4 -----&gt; ZnSO4 + Cu
    6·1 answer
  • You are given a 1.00 molal solution of an unknown solute dissolved in water and told that you must determine if the solute is a
    14·1 answer
  • Consider this equilibrium for a buffer solution: CH3COOH + H2O CH3COO- + H3O + . When a small amount of acid is added to this sy
    6·1 answer
  • At the end of an experiment, the product is a mixture of the starting material, which is benzoic acid and the product, which is
    11·1 answer
  • 5.0 mL of 0.050 M Ba(NO3)2 M and 100.0 mL of 0.10 M KIO3 are added together in a 250 mL erlenmeyer flask. In this problem, ignor
    10·1 answer
  • PLEASE HELP WILL GIVE BRAINLIEST
    12·1 answer
  • Question 3
    9·1 answer
  • if you push the head of a nail against your skin and then push the point of the same nail against your skin with the same force
    9·1 answer
  • For the reaction SO3 + H2O  H2SO4 , how many grams of SO3 are required to produce 18. 3 g H2SO4 ? a 14. 9 g b 3. 09 g c 42. 0 g
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!