Question from Photoelectric Effect Pre- Assessment Module

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104785906
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Question from Photoelectric Effect Pre- Assessment Module

Postby 104785906 » Tue Jul 04, 2017 9:55 pm

Light hits a sodium metal surface and the velocity of the ejected electron is 6.61 x 105 m.s-1. The work function for sodium is 150.6 kJ.mol-1.
Answer the following three questions.

A. What is the kinetic energy of the ejected electron?
B. How much energy is required to remove an electron from one sodium atom?
C. What is the frequency of the incident light on the sodium metal surface?

I've seen that this question has already been asked but I'm unsure as to solve because for part A, the equation that solves for kinetic energy asks for mass and the word problem doesn't provide it. Do I need to use another equation first to solve for mass, if so, which one?

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Re: Question from Photoelectric Effect Pre- Assessment Module

Postby Chem_Mod » Wed Jul 05, 2017 10:37 am

The mass of an electron is a constant found in the textbook and on the cover sheet for tests and exams.


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