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ser-zykov [4K]
3 years ago
15

What is the energy of a photon with: a wavelength of 827 nm? What type of radiation is it?

Chemistry
1 answer:
xeze [42]3 years ago
7 0

Explanation:

Given parameters:

 Wavelength of photon  = 827nm  = 827  x 10⁻⁹m

Unknown:

Energy of the photon = ?

Type of radiation = ?

Solution:

The energy of a photon can be derived using the expression below:

      E = \frac{h c}{wavelength}

h is the Planck's constant = 6.63 x 10⁻³⁴m²kg/s

c is the speed of light = 3 x 10⁸m/s

Insert the parameters and solve;

      E  = \frac{6.63 x 10^{-34} x 3 x 10^{8}  }{827x 10^{-9} }  

       E = 2.4 x 10⁻¹⁹J

Type of radiation:

Near infrared radiation

 

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The number of mole of ethanol present in the beaker is 0.217 mole

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The mole of a substance is related to it's mass and molar mass according to the following equation:
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From the question given above, the following data were obtained:
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How much heat is required to raise the temperature of 65.8 grams of water from 31.5ºC to 46.9ºC?
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