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
kirill115 [55]
3 years ago
15

The 488 nm laser is shine on a lithium metal whose work function is 2.9 eV will you be able to see any photoelectrons? if yes wh

at is the kinetic energy of the electrons if no what wavelength of light should be used to see the photoelectrons
Chemistry
1 answer:
nalin [4]3 years ago
3 0

Answer:

There will not be any ejection of photoelectrons

Explanation:

Energy of the photon= hc/λ

Where;

h= Plank's constant

c= speed of light

λ= wavelength of the incident photon

E= 6.6×10^-34 × 3 ×10^8/488 × 10^-9

E= 4.1 ×10^-19 J

Work function of the metal (Wo)= 2.9 eV × 1.6 × 10^-19 = 4.64 × 10^-19 J

There can only be ejected photoelectrons when E>Wo but in this case, E<Wo hence there will not be any ejection of photoelectrons.

You might be interested in
sample of atmospheric gas collected at an industrial site is stored in a 250 mL amber glass bottle that has a pressure of 1.02 a
Nady [450]

Answer:- New pressure is 0.942 atm.

Solution:- The volume of the glass bottle would remain constant here and the pressure will change with the temperature.

Pressure is directly proportional to the kelvin temperature. The equation used here is:

P_1T_2=P_2T_1

Where, T_1 and T_2 are initial and final temperatures, P_1 and P_2 are initial and final pressures.

T_1 = 20.3 + 273.15 = 293.45 K

T_2 = -2.0 + 273.15 = 271.15 K

P_1 = 1.02 atm

T_2  = ?

Let's plug in the values in the equation and solve it for final pressure.

1.02atm(271.15K)=P_2(293.45K)

P_2=\frac{1.02atm*271.15K}{293.45K}

P_2 = 0.942 atm

So, the new pressure of the jar is 0.942 atm.


5 0
3 years ago
Identify the property of the substance that is changing. A. composition B. volume C. boiling point
Colt1911 [192]

Property of Volume changes.

7 0
3 years ago
Read 2 more answers
Yes thank you I love and appreciate this so much woooo
Natali5045456 [20]
Thank you for the points

Hope you have a great day/night
4 0
3 years ago
Read 2 more answers
How does distillation work.
Usimov [2.4K]

Answer:

Distillation is an important commercial process that is used in the purification of a large variety of materials. However, before we begin a discussion of distillation, it would probably be beneficial to define the terms that describe the process and related properties. ... Elevation of the boiling point with an increase in external pressure, while important in cooking and sterilizing food or utensils, is less important in distillation.

Explanation:

8 0
2 years ago
I will not stop asking until someone answer hurry up already
Reil [10]

Answer:

Gravity.

Explanation:

4 0
2 years ago
Other questions:
  • When K2SO4 is separated into its ions, how is it written?
    15·2 answers
  • Using charge to describe an atom
    10·1 answer
  • Describe an experiment for the preparation and collection of Oxygen sodium peroxide​
    5·1 answer
  • How much time would it take for 12000 atoms of nitrogen-13 (half-life is 7.13 s) to decay to 750 atoms?
    15·1 answer
  • Occurs when energy is added or removed
    5·1 answer
  • What atom has 19 protons and 20 neutrons
    8·2 answers
  • Propose the structure of the following HNMR data.
    14·1 answer
  • Which of the following is an example of velocity
    6·1 answer
  • Can somebody please help me!!!!
    13·1 answer
  • I don’t get this- it’s due tmrw
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!