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Mrrafil [7]
3 years ago
11

Planck's constant relates the energy in one photon of electromagnetic radiation to the frequency of the radiation, varying:

Chemistry
2 answers:
notka56 [123]3 years ago
5 0

The answer is inversely

GrogVix [38]3 years ago
5 0

Answer:

Option (b) "inversely

"

Explanation:

The energy of a photon is given by :

E=\dfrac{hc}{\lambda}

Where

h is the Planck's constant

c is the speed of light

\lambda is the wavelength

Or it can be written as :

E=h\nu.....(1)

\nu is the frequency.

Equation (1) can be rearranged as :

h=\dfrac{E}{\nu}

So, it is clear that Planck's constant relates the energy in one photon of electromagnetic radiation is inversely proportional to the frequency of the radiation. Hence, the correct option is (b) "inversely".

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The difference between the Thompson's plum pudding model and the Rutherford atom model is the location of the electrons (option a).

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3 years ago
0.450 gram of Fe contains how many atoms?
mihalych1998 [28]

Answer:

0.450 grams of Fe contains 4.85*10²¹ atoms

Explanation:

Molar mass is the mass of one mole of a substance, which can be an element or a compound.

In this case, the molar mass of iron Fe is 55.85 g / mole. Then you can apply the following rule of three: if by definition of molar mass 1 mole of Fe contains 55.85 grams, then how many moles will contain 0.450 grams?

amount of moles of Fe=\frac{0.450 grams*1 mole}{55.85 grams}

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On the other hand, Avogadro's Number is called the number of particles that make up a substance (usually atoms or molecules) and that can be found in the amount of one mole of said substance. Its value is 6.023*10²³ particles per mole. Avogadro's number applies to any substance.

Then you can apply the following rule of three: if by definition of Avogadro's Number 1 mole of Fe contains 6.023*10²³ atoms, 8.06*10⁻³ moles how many atoms does it contain?

amount of atoms=\frac{8.06*10^{-3}moles*6.023*10^{23}atoms }{1 mole}

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<u><em>0.450 grams of Fe contains 4.85*10²¹ atoms</em></u>

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3 years ago
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