How can find out the velocity of an electron


1. How can find out the velocity of an electron emitted by a metal whose threshold frequency is 2.41×1014  when it is exposed to visible light of wavelength5.01×10-7 m

2. Determine how many grams of oxygen are formed when the 6.21 moles of KOH are formed?

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Chemistry: How can find out the velocity of an electron
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