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Alborosie
3 years ago
14

Finding energy and wavelength?

Chemistry
1 answer:
deff fn [24]3 years ago
3 0
The equation is
W = C/F
W= 3.00 x 10^8 m/sec
——————————
6.165 x 10^14 Hz
W= 4.87 x 10^-7 m

Energy is
E=hF
E= (6.626 x 10^-34 Jxsec )(6.165 x 10^14 Hz)
E= 4.085 x 10^-19 J




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Then we have to <u>calculate the moles</u> of MnO_4^-:

M~=~\frac{mol}{L}

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mol~=~0.033~M*0.0633L=~0.002088~mol~MnO_4^-

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0.002088~mol~MnO_4^-\frac{5~mol~Fe^+^2}{1~mol~MnO_4^-}=0.01044~mol~Fe^+^2

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M=\frac{0.01044~mol~Fe^+^2}{0.0455~L}=0.230~M

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3 years ago
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Answer:

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3

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=?

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∴ΔU=0

Now from first law of thermodynamics,

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∴q=–w

Given that the heat is absorbed.

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V

i

​

V

f

​

​

)

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i

​

V

f

​

​

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2 years ago
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qwelly [4]

Answer:

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