All categories

2 years ago

Calculate the energy of an EM wave having wavelength 4.2nm

Chemistry

1 answer:

Natali [406]2 years ago

3 0

The energy of an electromagnetic wave that has a wavelength of 4.2nm is 4.731 × 10-¹⁷ J.

<h3>How to calculate energy of a wave?</h3>

The energy of a wave can be calculated using the following formula:

E = hf

Where;

E = energy
h = Planck's constant (6.626 × 10-³⁴J/s)
f = frequency of the wave

However, the frequency must be calculated first as follows:

λ = v / f

Where;

λ = wavelength
v = speed of light (3 × 10⁸m/s)

4.2 × 10-⁹ = 3 × 10⁸/f

f = 7.14 × 10¹⁶Hz

Energy = 6.626 × 10-³⁴ × 7.14 × 10¹⁶

Energy of the wave = 4.731 × 10-¹⁷ J

Therefore, the energy of an electromagnetic wave that has a wavelength of 4.2nm is 4.731 × 10-¹⁷ J.

Learn more about energy at: brainly.com/question/9624826

#SPJ1

You might be interested in

What is the mistake in the set up above?<br>

Misha Larkins [42]

Answer:

Explanation:

7 0

3 years ago

Describe how a constant volume calorimeter can be used to measure the heat transferred from a burning piece of coal to cool wate

Vlad1618 [11]

Answer:

A Calorimeter is a device used to measure the amount of heat involved in a chemical or physical process.

Explanation:

Ex- when an exothermic reaction ( accompanied by or requiring absorption of heat)occurs in solution in a calorimeter, the heat produced by the reaction is absorbed by the solution increasing its temperature.

- When an endothermic reaction (Heat evolving reaction) occurs, the heat required is absorbed from the thermal energy of the solution, decreasing its temperature.

A burning piece of coal which is releasing heat due to its combustion and is transferred to water.

Mark as Brainliest ;)

7 0

3 years ago

What is the difference between a heterogeneous and homogeneous mixture? A. A heterogeneous can only be solid, and a homogeneous

muminat

Answer:

The reverse of answer B

Explanation:

In a heterogeneous mixture the phases are clearly seen distinguished but a uniform single phase is seen in a homogeneous mixture

3 0

4 years ago

Nitroglycerin is a dangerous powerful explosive that violently decomposes when it is shaken or dropped. The Swedish chemist Alfr

marshall27 [118]

<u>Answer:</u> The balanced chemical equation for the decomposition of nitroglycerin is written below.

<u>Explanation:</u>

Decomposition reaction is defined as the reaction in which a single large substance breaks down into two or more smaller substances.

Every balanced chemical equation follows law of conservation of mass.

A balanced chemical equation is defined as the equation in which total number of individual atoms on the reactant side is equal to the total number of individual atoms on product side.

The balanced chemical equation for the decomposition of nitroglycerin follows:

$4C_3H_5N_3O_9(l)\rightarrow 12CO_2(g)+10H_2O(g)+6N_2(g)+O_2(g)$

By Stoichiometry of the reaction:

1 mole of liquid nitroglycerin decomposes into 12 moles of carbon dioxide gas, 10 moles of gaseous water, 6 moles of dinitrogen gas and 1 mole of dioxygen gas.

Hence, the balanced chemical equation for the decomposition of nitroglycerin is written above.

3 0

4 years ago

Which statements about light are true? Select all the correct answers A.It can travel through empty space B.It has no mass C.It

cestrela7 [59]

Answer:

A. It can travel through empty space

Explanation:

Unlike sound it light can travel at an empty space or vacuum.

Hope it helps <3 and Amen.

5 0

4 years ago