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Agata [3.3K]
3 years ago
7

5. For Sodium, the Work Function is listed as 2.75 eV but the Ionization Energy is listed as 5.14 eV. Is one of the experiments

wrong? Give a possible explanation as to this difference in the minimum energy needed to eject or free an electron from Sodium.
Chemistry
1 answer:
Nitella [24]3 years ago
7 0

Answer:

See explanation

Explanation:

The work function of a metal is defined as that minimum energy which is required to remove one electron from the surface of a metal when it is irradiated with a photon of light. The work function is different for different metals.

The ionization energy of a metal is the energy required to remove an electron from an atom. It depends on the position of the electron within the atom.

The work function specifically refers to the energy required to remove an electron from the conduction band of a metal. Hence, the work function is always lower than the ionization energy.

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5 0
3 years ago
A 544 mg of a mixture of fluorene and benzoic acid was weighed out and subjected to an extraction and recrystallization. After t
butalik [34]

<u>Answer:</u> The percent composition of fluorene is 33.08 % and benzoic acid is 36.03 %.

<u>Explanation:</u>

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Mass of mixture = 544 mg

Mass of fluorene after purification = 1.80\times 10^2mg=180mg

Mass of benzoic acid after purification = 196 mg

To calculate the percentage composition of a substance in a mixture, we use the equation:

\%\text{ composition of substance}=\frac{\text{Mass of substance}}{\text{Mass of mixture}}\times 100

<u>For fluorene:</u>

\%\text{ composition of fluorene}=\frac{180}{544}\times 100=33.08\%

Hence, the percent composition of fluorene is 33.08 %

<u>For benzoic acid:</u>

\%\text{ composition of benzoic acid}=\frac{196}{544}\times 100=36.03\%

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4 years ago
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