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Stells [14]
3 years ago
14

What is the work function of gold metal in kJ/mol if light with λ = 234 nm is necessary to eject electrons?

Chemistry
1 answer:
Tju [1.3M]3 years ago
8 0

Answer

512kj/mole

Explanation:

What is the work function of gold metal in kJ/mol if light with λ = 234 nm is necessary to eject electrons?

The energy can be calculated using below expresion;

E = hc/λ

Where h= planks constant= 6.626 x 10^-34

c= speed of light= 3 x 10^

λ= wavelength

hc= (6.626 x 10^-34 x 3 x 10^ 8)

=

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250 mL of a solution of calcium oxalate is the evaporated until only a residue of solid calcium
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From the question;

1.2 * 10^-3 mols dissolves in 250 mL

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x = 1.2 * 10^-3 mols * 1000/250

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