Chemistry College

A heat lamp produces 26.0 watts of power at a wavelength of 6.0 μm .

How many photons are emitted per second? (1 W=1 J/s.)

Express your answer to three significant figures.

Answers

Answer 1

The number of photons that is emitted per second is 7.9 * 10^18 photons per second.

What is the number of photons emitted?

We know that the photons have to do with the particles of light that are in motion. Now, we know that the power that is being produced by the heat lamps have been obtained as 26.0 watts. It is also know that this could be written as 26 J/s.

We now have to find the energy of the photons;

Wavelength of the photons = 6.0 μm or 6 * 10^-6 m

Plank's constant = 6.6 * 10^-34 Js

Speed of light = 3 * 10^-10 m/s

Now, we have

E = 6.6 * 10^-34 * 3 * 10^-10 /6 * 10^-6

E = 3.3 * 10^- 18 J

We have;

26 J/s * 1 photon/ 3.3 * 10^- 18 J

= 7.9 * 10^18 photons per second.

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Related Questions

The chemical equation below shows reactants and products.
6CO₂ +12H₂O+light + enzymes - C6H12O6 +602 + 6H₂O
Which statement is BEST supported by analyzing this equation?
A. CO, is made from the chemical reaction.
B. No new compounds are made from this reaction.
C. O,, oxygen gas, is needed to make the reaction start.
D. The atoms rearrange in the chemical reaction so that CeHuO.
glucose, is made.

Answers

Option D. The atoms rearrange in the chemical reaction so that glucose is made.

A chemical reaction is a manner in which one or extra substances, the reactants, are transformed into at least one or extra different materials, the goods. materials are both chemical factors or compounds. A chemical reaction rearranges the constituent atoms of the reactants to create one-of-a-kind substances as merchandise.

Examples of chemical reactions in everyday life consist of photosynthesis, rust, baking, digestion, combustion, chemical batteries, fermentation, and washing with soap and water. Chemical reactions arise everywhere in the global around you, now not simply in a chemistry lab.

On the idea of the product fashioned, special forms of reactions are Combustion response, Decomposition response, Neutralization response, Redox response, Precipitation or Double-Displacement reaction, Synthesis response

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How do I balance these equations? Please explain so I can learn how.

Answers

To calculate the atoms of an element in a given molecule, we need to multiply stoichiometry by the number that is written on the foot of that element. Therefore, the balanced equation is

CH[tex]_4[/tex]+4S[tex]\rightarrow[/tex]CS[tex]_2[/tex]+2H[tex]_2[/tex]S

What is Balanced equation?

Balanced equation is the one in which the total number of atoms of a species on reactant side is equal to the total number of atoms on product side. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, displacement reaction.

The skeletal equation is

CH[tex]_4[/tex]+S[tex]\rightarrow[/tex]CS[tex]_2[/tex]+H[tex]_2[/tex]S

The number of carbon atoms on reactant and product side is 1, so C is balanced.

The number of hydrogen atoms on reactant side is 4 while on product side it is 2, so to balance we need to multiply H[tex]_2[/tex]S by 2.

CH[tex]_4[/tex]+S[tex]\rightarrow[/tex]CS[tex]_2[/tex]+2H[tex]_2[/tex]S

The number of sulfur atoms on reactant side is 1 while on product side it is 4, so to balance we need to multiply S by 4.

CH[tex]_4[/tex]+4S[tex]\rightarrow[/tex]CS[tex]_2[/tex]+2H[tex]_2[/tex]S

Therefore, the balanced equation is

CH[tex]_4[/tex]+4S[tex]\rightarrow[/tex]CS[tex]_2[/tex]+2H[tex]_2[/tex]S

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A local AM radio station broadcasts at a frequency of 742 kHz.

Calculate the wavelength at which it is broadcasting.
Wavelength =
m

(1 kHz = 10 3 sec -1)

Answers

The wavelength of the wave is obtained as 0.4 m.

What is the wavelength of the broadcasting station?

The wavelength has to do with the distance that have been covered by the wave. In this case, we can use the frequency of the wave that have been supplied in the question and the speed of light which is a constant to be able to obtain the wavelength of the wave.

Knowing that;

wavelength = speed of light/frequency

speed of light = 3 * 10^8 m/s

Frequency = 742 * 10^3 Hz

wavelength =  3 * 10^8 m/s/ 742 * 10^3 Hz

= 0.4 m

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