We’re being asked to determine the shortest frequency of light required to remove an electron from a sample of tungsten metal. The threshold frequency of the metal is 3551 kJ/mol.
Recall that work function or threshold frequency of the metal is the minimum energy required to remove an electron from the metal.
Therefore, we can calculate the shortest frequency of light required from the threshold frequency or threshold energy.
ΔE = 3551 kJ/mol
Determine the shortest frequency of light required to remove an electron from a sample of tungsten metal, if the binding energy of tungsten is 3551 kJ/mol. (In other words, 3551 kJ of energy is required to remove one mole of electrons. Hint: first find the energy required to remove a single electron.)
A) 6.19 × 1016 Hz
B) 1.27 × 1017 Hz
C) 4.74 × 1015 Hz
D) 3.91 × 1017 Hz
E) 8.90 × 1015 Hz
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