CEM 141 - EXAM 2 EXAM WITH
CORRECT QUESTIONS AND ANSWERS
2025
mole - correct-answers6.022 x 10^23 things
number of particles that allows us to convert from the molecular to the macroscopic level
limiting reactant/reagent - correct-answersamount of one of the reactants which limits how
much product can be formed. smallest amount.
percent yield - correct-answersactual/theoretical x 100
electromagnetic radiation - correct-answers
,wavelength - correct-answersThe distance between two corresponding parts of a wave.
seconds/wave. 1/frequency. measured in m
amplitude - correct-answersHeight of a wave
frequency - correct-answerswaves/second. 1/wavelength. measured in Hz
Constant (c) - correct-answers3 x 10^8 m/s. c=(wavelength)(frequency)
constructive interference - correct-answersThe interference that occurs when two waves
combine to make a wave with a larger amplitude = brighter
, destructive interference - correct-answersThe interference that occurs when two waves
combine to make a wave with a smaller amplitude = darker
diffraction - correct-answersThe bending of a wave as it moves around an obstacle or passes
through a narrow opening
models of light - correct-answerslight as a wave/particle
photoelectric effect - correct-answersThe emission of electrons from a metal when light shines
on the metal.
why is light considered a wave (evidence) - correct-answersdiffraction, interference
CORRECT QUESTIONS AND ANSWERS
2025
mole - correct-answers6.022 x 10^23 things
number of particles that allows us to convert from the molecular to the macroscopic level
limiting reactant/reagent - correct-answersamount of one of the reactants which limits how
much product can be formed. smallest amount.
percent yield - correct-answersactual/theoretical x 100
electromagnetic radiation - correct-answers
,wavelength - correct-answersThe distance between two corresponding parts of a wave.
seconds/wave. 1/frequency. measured in m
amplitude - correct-answersHeight of a wave
frequency - correct-answerswaves/second. 1/wavelength. measured in Hz
Constant (c) - correct-answers3 x 10^8 m/s. c=(wavelength)(frequency)
constructive interference - correct-answersThe interference that occurs when two waves
combine to make a wave with a larger amplitude = brighter
, destructive interference - correct-answersThe interference that occurs when two waves
combine to make a wave with a smaller amplitude = darker
diffraction - correct-answersThe bending of a wave as it moves around an obstacle or passes
through a narrow opening
models of light - correct-answerslight as a wave/particle
photoelectric effect - correct-answersThe emission of electrons from a metal when light shines
on the metal.
why is light considered a wave (evidence) - correct-answersdiffraction, interference
