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## How do you calculate the energy of a photon?

The energy of a single photon is: **hν or = (h/2π)ω** where h is Planck’s constant: 6.626 x 10-34 Joule-sec.

## What is the energy in kJ of a mole of photons with?

After finding the energy of one photon of each wavelength, express the energy of a mole of these photons in kJ/mol. Thus the energy carried by a single photon of 535 nm light is **3.71 × 10 ^{−}^{19} J**.

## How much energy is 3 moles photons?

Each photon has an energy of 2.9450×10^{–}^{19} J. 1 mol of a photon has 6.022×10^{23} photons. The answer is option A), In 3.00 moles of photons with a wavelength of 675 nm, the energy is **532 kJ**.

## What is the energy of 0.10 mol of these photons?

It is known that energy can be calculated as E = h 14 -1 = 6.626×10-34 J.s ×5.09×10 s = 3.37×10 -19JFor 0.10 mol of photon = 3.37×10 -19J×0.10×6.023×10 =20297.5JThus the energy of 0.10 mol of photon is found to be **20297.5 J/photon**.

## How do you calculate photons?

**1 Answer**

- Calculate the energy of a photon. E=hcλ=6.626×1034J⋅s×2.998×108m⋅s−1670×10−9m=2.965×10−19J. ( 3 significant figures + 1 guard digit)
- Calculate the total energy per second. Total energy = 1.0×10−3W×1J⋅s−11W=1.0×10−3J⋅s−1.
- Calculate the number of photons per millisecond. Number of photons =

## How do you calculate energy emitted?

The maximum energy of an emitted electron is **equal to the energy of a photon for frequency f** (i.e., E = hf ), minus the energy required to eject an electron from the metal’s surface (the so-called work function).

## How do you calculate energy in Joules per photon?

The equation for determining the energy of a photon of electromagnetic radiation is **E=hν** , where E is energy in Joules, h is Planck’s constant, 6.626×10−34J⋅s , and ν (pronounced “noo”) is the frequency.

## What is the energy in J of 1 mole of the photon?

The energy of photon is the energy carried by 1 mole of photon. It is directly proportional to the frequency of the electromagnetic radiation where the proportionality constant is the Planck’s constant (h). The value of Planck’s constant is **6.626×10−34 Js 6.626 × 10 − 34 J s .**

## What is the energy of one mole of photons with 540 nm?

The energy of 1 mole of the photon is **3.68 × 10 ^{–}^{19} J**.

## How many photons are in one mole of photons?

The einstein (symbol E) is a unit defined as the energy in one mole of photons (**6.022×10 ^{23} photons**).

## How many joules is a photon?

It should not surprise us that the energy of a single photon is small. It is also useful to calculate the number of photons in a Joule of energy. This is just the inverse of the energy per photon, and gives **3.2×10 ^{18} photons per Joule**.