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
Vlad1618 [11]
3 years ago
12

Pennies are made of zinc coated with copper. Copper has a work function of 4.7 eV. The ozone layer blocks nearly all solar radia

tion with wavelength shorter than 320nm, but a very small amount of 200 nm light still manages to reach the Earth's surface. Can direct sunlight produce photoelectrons from a penny?
Chemistry
1 answer:
Vadim26 [7]3 years ago
4 0

Answer:

yes  it can  λ =265  nm

Explanation:

Here we will use  the relationship

   E = h c/λ  ∴   λ  = E/ hc  where

                                          h= Plank's constant

                                           c= Speed of light

                                           λ = Wavelength = ?

Substituting

note need E in J ,

E = 4.7 eV x 1.602 x 10⁻¹⁹ J/eV = 7.5 x 10⁻¹⁹ J)

λ = 7.5 x 10 ⁻¹⁹ J / (  6.626 x 10⁻³⁴ Js x 3 x 10^8) =  2.65 x 10⁻⁷ m = 2.65

=  2.65 x 10⁻⁷ m x 1 x 10⁹ nm/m = 265 nm

You might be interested in
Out of the 3 of these
Delvig [45]
Electrons can be transformed from on object to another , (can you mark me brainlyest)
6 0
3 years ago
You plug in an extension cord and have to be very careful around the electrical outlet. However, you can handle the extension co
evablogger [386]
Because the cord is wrapped in rubber or plastic and they are not good conductors
4 0
3 years ago
Read 2 more answers
Define energy and power and describe the relationship that exists between them.
bagirrra123 [75]
Energy is ability to work or function. Power is the amount of energy transferred to an object.
When energy is transferred to an object or has energy it moves and power is the energy put in a object, meaning they work together to move the object
4 0
2 years ago
S<br> SIO₂ +3C Sic +20o<br> Sic ? mass in grams<br> С c-
seraphim [82]

Answer:

26.74g

Explanation:

The equation of the reaction is;

SIO₂ + 3C --> SiC +2CO

From the balanced equation, the relationship between SiC and C is;

3 mol of C produces 1 mol of SiC

Converting mol to mass using; Mass = moles * Molar mass

Mass of SiC = 1 mol * 40.11 g/mol = 40.11g

This means;

3 mol of C produces 40.11g of SiC

2 mol of C produces xg of SiC

3 = 40.11

2 = x

x = 2 * 40.11 / 3 = 26.74g

6 0
3 years ago
According to the Brensted-Lowry model write the equation for provided acid showing
Taya2010 [7]

Answer:

i dont know sorry

Explanation:

3 0
2 years ago
Other questions:
  • A cyclist rode at an average speed of 10 mph for 15 miles. How far was the ride
    14·2 answers
  • Determine the root-mean square speed of CO2 molecules that have an average kinetic energy of 4.2 x10-21 J per molecule.
    9·1 answer
  • Heat required to raise 1 g of a substance 1°C
    8·1 answer
  • Why males on average have VO2max than females?
    13·1 answer
  • Choose the ground state electron configuration for Cr3+.
    8·1 answer
  • If a compound contains an anion which is the conjugate base of a weak acid, the addition of hydronium ion solubility does what ?
    7·1 answer
  • What is an example of conduction, raditaon convection
    14·1 answer
  • Answer this i’m so confused
    10·1 answer
  • Plz answer plzplzpzlpl​
    12·1 answer
  • What are two things that interact that determine if there is a phase change or not HELP
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!