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2 years ago

What is the energy of a photon emitted with a wavelength of 448 nm?

1 answer:

3 0

According to the Planck-Einstein relation, the energy of a photon emitted with a wavelength of 448 nm is 4.44 × 10⁻¹⁹ J.

<h3>What is a photon?</h3>

A photon is a particle representing a quantum of light or other electromagnetic radiation. A photon carries energy proportional to the radiation frequency but has zero rest mass.

Step 1. Calculate the frequency of the photon.

A photon is emitted with a wavelength (λ) of 448 nm. Given the speed of light (c) is 3.00 × 10⁸ m/s, we can calculate the frequency (ν) of the photon using the following expression.

ν = c/λ

ν = (3.00 × 10⁸ m/s ) / (4.48 × 10⁻⁷ m) = 6.70 × 10¹⁴ s⁻¹

Step 2. Calculate the energy (E) of the photon.

We will use the Planck-Einstein relation, being Planck's constant h = 6.63 × 10⁻³⁴ J.s.

E = h × ν

E = (6.63 × 10⁻³⁴ J.s) × (6.70 × 10¹⁴ s⁻¹) = 4.44 × 10⁻¹⁹ J

According to the Planck-Einstein relation, the energy of a photon emitted with a wavelength of 448 nm is 4.44 × 10⁻¹⁹ J.

Learn more about photons here: brainly.com/question/15946945

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A gaseous compound containing carbon and hydrogen was analyzed and found to consist of 83.65% carbon by mass. The molar mass of

steposvetlana [31]

Answer:

The molecular formula is C6H14

Explanation:

Step 1: Data given

Suppose the mass of compound = 100 grams

A compound contains:

Carbon = 83.65 % = 83.65 grams

Hydrogen = 16.35 % = 16.35 grams

Atomic mass of carbon = 12.01 g/mol

Atomic mass of hydrogen = 1.01 g/mol

Molar mass of compound = 86.2 g/mol

Step 2: Calculate moles

Moles = mass / molar mass

Moles carbon = 83.65 grams / 12.01 g/mol

Moles carbon = 6.965 moles

Moles hydrogen = 16.35 grams / 1.01 g/mol

Moles hydrogen = 16.19 moles

Step 3: Calculate mol ratio

We divide by the smallest amount of moles

C: 6.965 moles / 6.965 moles = 1

H = 16.19 moles / 6.965 moles = 2.33

This means for 1 mol C we have 2.33 moles H OR for 3 moles C we have 7 moles H

The empirical formula is C3H7

The molecular mass of this formula is 43.1 g/mol

Step 4: Calculate molecular formula

We have to multiply the empirical formula by n

n = 86.2 g/mol / 43.1 g/mol

n = 2

Molecular formula = 2*(C3H7) = C6H14

The molecular formula is C6H14

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4 years ago

"Splotchy" most likely refers to a mineral's: O color luster streak O hardness

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Answer:

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3 years ago

Read 2 more answers

How many total atoms are there in 74.5 g of carbon dioxide (CO2)? I am not sure if I did it correct I ended up getting 1.02 * 10

AlekseyPX

Molar mass CO₂ = 44.0 g/mol

44.0 g ----------------- 6.02x10²³ molecules
74.5 g ----------------- ??

74.5 x ( 6.02x10²³) / 44.0

= 1.019x10²⁴ molecules of CO2

Calculate the number of atoms :

CO₂ => 1 atom of Carbon , 2 atoms of Oxygen ( 1 + 2 = 3 atoms )

therefore:

1 molecule CO2 ---------------------- 3 atoms
1.019x10²⁴ CO2 --------------------- ?? atoms

3 x ( 1.019x10²⁴) / 1 =

= 3.057x10²⁴ atoms of CO₂

hope this helps!

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3 years ago

Determine the number of electrons in a Sion with a charge of + 3

lesya [120]

Answer:

If you're talking about a Sulfur ion, there are 13 electrons.

Explanation:

Sulfur originally had 16 electrons in its atom.

A charge of +3 means that sulfur must have lost 3 electrons, and therefore needs to gain back 3 electrons to achieve its atomic configuration.

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