Chemistry 6.1 & 6.2 PRACTICE TEST
Light wave A has a greater frequency than light wave B. Which has a greater wavelength? A) Wave A B) Wave B C) They're equal D) Not enough info
B. Wave B
What is the frequency of a photon if the energy is 7.26 × 10⁻¹⁹ J? (h = 6.626 × 10⁻³⁴ J • s)
1.09 x 10 ^15 s-1
What is the energy of a mole of photons that have a wavelength of 701 nm? (h = 6.626 × 10⁻³⁴ J • s and c = 3.00 × 10⁸ m/s)
1.7 x 10 ^5 J
What is the energy of light that must be absorbed by a hydrogen atom to transition an electron from n = 3 to n = 6?
1.82 x 10 ^ -19 J
What is the wavelength (in nm) of a photon if the energy is 7.26 × 10⁻¹⁹ J? (h = 6.626 × 10⁻³⁴ J • s)
273.8 nm
What is the wavelength of blue light that has a frequency of 6.68 × 10¹⁴ s⁻¹? (c = 3.00 × 10⁸ m/s)
4.5 x 10^ -7 m
What is the wavelength of light (in nm) emitted when an electron transitions from n = 5 to n = 2 in a hydrogen atom?
434.2 nm
What is the energy of a photon with a frequency of 7.00 × 10¹⁴ s⁻¹? (h = 6.626 × 10⁻³⁴ J • s)
46.58 x 10 ^ -20 J
What is the frequency of green light that has a wavelength of 531 nm? (c = 3.00 x 10⁸ m/s)
5.6 x 10^44 s-1
In the photoelectric effect, if the intensity of light shone on a metal increases, what will happen? A) Ejected electrons will be faster B) Ejected electrons will be slower C) There will be more electrons ejected D) There will be fewer electrons ejected E) No change
C. There will be more electrons ejected
What happens to the energy of a photon if the wavelength is doubled? A) Energy doubles B) Energy quadruples C) No change in energy D) Energy is reduced by one-half E) Energy is reduced by one-quarter
D. Energy is reduced by one-half
Red light has a _____ frequency and a _____ wavelength than ultraviolet rays. A) higher, shorter B) higher, longer C) lower, lower D) lower, longer E) lower, shorter
D. lower, longer ;)
Which color (frequency) of light travels the fastest in a vacuum? A) Red B) Yellow C) Green D) Violet E) All have the same speed
E. All have the same speed
Which of the following forms of radiation has the highest frequency? A) red light B) microwaves C) ultraviolet rays D) radio waves E) gamma rays
E. gamma rays
