chemistry

A 100-watt light bulb radiates energy at a rate of 100 J/s. (The watt, a unit of power or energy over time, is defined as 1 J/s.) If all of the light emitted has a wavelength of 525 nm , how many photons are emitted per second?

okay so i do:
((6.626*10^-34)(3.00*10^3))/(5.25*10^-7)
and i got 3.7862 *10^-24 J
then
(100J/S)*(photons/3.7862 *10^-24 J)
i got = 2.641*10^20 photons/second

im doing this on mastering chemistry and its saying its wrong!!??? i don't understand where my mistake is.

  1. 👍 1
  2. 👎 0
  3. 👁 6,803
  1. okay so i do:
    ((6.626*10^-34)(3.00*10^3))/(5.25*10^-7)
    and i got 3.7862 *10^-24 J
    THAT IS ENERGY PER PHOTON.

    then
    energy/photon*numberphotons/sec=100J/sec
    Number Photons/sec=100/3.7862 *10^-24=2.64117057e25

    1. 👍 1
    2. 👎 9
    👨‍🏫
    bobpursley
  2. yeah, thanks haha i was off by 10^5 ughhh thank you so much, though

    1. 👍 0
    2. 👎 2
  3. Isn't the speed of light 3.0*10^8 though instead of 3.0*10^3?

    1. 👍 3
    2. 👎 1
  4. Hi, I have for a constant for c is 3.00 x 10^8 and for the denominator ( 5.25 x 10^-9) after I converted it from nm to m. why are you exponents different? thanks

    1. 👍 0
    2. 👎 0

Respond to this Question

First Name

Your Response

Similar Questions

  1. Algebra

    An amplifier has a 50 watt output and a 5 watt input. What is the gain in decibels for this amplifier, rounded to the nearest decibel?

  2. Physics

    A 100 watts light bulb has an average life of 2000 hours. How much energy does it consume over its lifetime? The only thing I got was power=100 watts and time = 2000 hours but I need to convert to seconds and I don't kn how to do

  3. Physics

    Suppose you were to drop a 9 lb bowling ball from the top of the Empire State Building, which is about 440 m tall, onto a machine that would catch it and then convert its kinetic energy into electrical energy. For how long could

  4. English

    Which of the following statements in a research paper would need citation? A. Washington, D.C. is the capital of the United States. B. The landing on the moon is one of the most exciting events in recent history.*** C.

  1. HVAC

    two HVAC technician are discussing units of energy.Technician A says that a BTU is defined as the work performed by a force of 1 neton[N] moving and object over a distance of 1 meter[M].Technician B says that that if you have a 60

  2. math

    calculate the resistances of (a) 100-watt 120-volt incandescent lamp, (b) a 750-watt 115-volt toaster, (c) a 1300 watt 110-volt portable iron.

  3. Math

    By what percent is a 100-watt light bulb brighter than a 60-watt light bulb? Round to the nearest tenth. 40/60 = 2/3 = 2 รท 3 = 0.666667 0.666667 x 100 = 66.6667% Answer: 66.7% Is this correct?

  4. Physics

    This question makes no sense to me. . . A 100-watt lamp glows brighter than a 25-watt lamp. What do you know about the resistances of these two lamps? ???? That they have different watts...thats all I can think of. Physics is not

  1. physics

    The amount of energy dissipated by a 100-W bulb in a common parallel circuit ____________________. a. All of these. b. None of these. c. is normally 100 joules per second. depends on the voltage supplied to the lamp. d. depends on

  2. Physics

    A 100-W light bulb has an average lifetime of 800 h. how many electrons Move through the bulb in its life?

  3. Physics

    A 100-Watt light bulb plugged into a 120-Volt outlet is left on for 60 seconds. How much energy (in Joules) is used up by the bulb during this time?

  4. Physics

    How many days does it take for a perfect blackbody cube (0.0100m on a side, 30.0 degree C)to radiate the same amount of energy that a one-hundred-watt light bulb uses in one hour? I got no idea to do it. Please give me some

You can view more similar questions or ask a new question.