Chemistry: Electrons are ejected from a surface with speeds ranging up to 1380 km/s when light with a wavelength of 173 nm is used. what is the work function of this surface? the speed of light is 2.99792 × 108 m/s and planck’s constant is 6.62607 × 10−34 j · s. answer in units of ev.

Electrons are ejected from a surface with speeds

Ответ:

cupcake20019peehui

10.03.2022

ΔE(work)= 692 Kj/mole e⁻ = 4.32 x 10²⁴ eV/mole e⁻

Explanation:

ΔE = hc/λ = (6.63 x 10⁻³⁴j·s)(2.99792 x 10⁸m/s)/(1.73 x 10⁻⁷m) = 1.15 x 10⁻¹⁸j/e⁻ x 6.023 x 10²³ e⁻/mole = 691,999 j/mole e⁻ = 692 Kj/mole e⁻ x 6.24 x 10²¹ eV/KJ = 4.32 x 10²⁴ eV/mole e⁻

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Ответ:

lvoltin1073

05.10.2021

Chemistry

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Electrons are ejected from a surface with speeds ranging up to 1380 km/s when light with a wavelength of 173 nm is used. what is the work function of this surface? the speed of light is 2.99792 × 108 m/s and planck’s constant is 6.62607 × 10−34 j · s. answer in units of ev.

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