Q-25: Green light shining on sodium surface causes photoelectrons with maximum kinetic energies of 0.02 e V to be emitted. If the work function of sodium is 2.28 e V, what is the frequency of the light and threshold frequency (h = 6.63 x 10-34 J x sec c = 3x 108 m/s; 1 e V = 1.60 x10-19 J)

A beam produces light at 5.27 * 10^-7 meters. How many photons of light from this beam would be necessary to increase the temperature of a metal with a mass of 4.56 g, and a heat capacity of 0.72 J/gC, by 1 degree C?

The diagram above represents the photoelectric effect for a metal. When the metal surface is exposed to light with increasing frequency and energy of photons, electrons first begin to be ejected from the metal when the energy of the photons is 3.3 × 10-19 J. 11. Which of the following is closest to the frequency of the light with photon energy of 3.3 × 10¬19 J? (A) 5.0 x 10-53 -1 S -1 (В) 5.0 х 10-16 (С) 5.0 х 1014 s-1 (D) 5.0 × 1052 s-1 12. Color Wavelength Red 647 – 760 nm Orange 585 – 647 nm Yellow 575 – 585 nm Green 491 – 575 nm Blue 424 – 491 nm Violet 300 – 424 nm Using the wavelength information provided above, what is the color of the light?

Pls help me with the following qiestion, explain and make sure its correct, thanks!!

What is the energy of the emitted photon when an electron in a hydrogen atom makes a transition from the n = 3 state to the n = 1 state? Note: In problems dealing with frequencies, wavelengths, photon energies, or electron transitons in hydrogen atoms, you may need some of the following equations: Av = c where c = 2.99792458 x 108 m s1 Ep = h v where h = 6.6260755 x 10-34 j .s %3D En = -RH / n2 where RH 2.1798741 x 10 18 J %3D

Green light has a frequency of about 6.00×1014s-1. What is the energy of a photon of green light? Express your answer to three significant figures and include the appropriate units.

Use the Heisenberg uncertainty principle to calculate Δx for an electron with Δv = 0.895 m/s. By what factor is the uncertainty of the (above) electron's position larger than the diameter of the hydrogen atom? (Assume the diameter of the hydrogen atom is 1.00×10-8 cm.) Use the Heisenberg uncertainty principle to calculate Δx for a ball (mass = 150 g, diameter = 6.85 cm) with Δv = 0.895 m/s. The uncertainty of the (above) ball's position is equal to what factor times the diameter of the ball?

Content/24SSEM_CHEM_114 X Aktiv Chemistry - Work b Home | bartleby x + ← → с app.aktiv.com Question 8 of 39 Consider these electron transitions in a hydrogen atom: I. n 2 n 1 Il. n 3 n = 1 III. n=1 → n = 4 Which of the electron transitions would release the most energy? A B с | III D I, II, and III release the same amount of energy + Submit

8,9,10 please

1a) What is the wavelength of a photon of light (in nm) whose frequency is 3.74 x 10^14 Hz? 1b)Consider a photon with wavelength 552 nm. What is the energy of a mole of photons of this wavelength (in kJ)?