Chemistry High School

What is the energy of the photons of a laser with a frequency of 5.75 x 10^12 Hz? (Hint: Remember to round your answer to the lowest number of significant figures.)

Planck's Constant =6.626 X 10^-34
Energy of a photon = Plancks constant x Frequency
​

What Is The Energy Of The Photons Of A Laser With A Frequency Of 5.75 X 10^12 Hz? (Hint: Remember To

Answers

Answer 1

Answer:

E = 3.81×10 ⁻²¹ J

Explanation:

Given data:

Frequency of photon = 5.75 ×10¹² Hz

Plancks constant = 6.626 ×10⁻³⁴ Js

Energy of photon = ?

Solution:

E = h×f

E = 6.626 ×10⁻³⁴ Js ×  5.75 ×10¹² s⁻¹

E = 38.1×10 ⁻²² J

E = 3.81×10 ⁻²¹ J

Related Questions

A laboratory hydrogen generator collects the gas produced by bubbling it through water. The total pressure of the gas collected is 751 mmHg. The temperature is 34 °C, at which water vapor pressure is 40.0 mmHg. Calculate the partial pressure of the hydrogen.

Answers

Answer:

[tex]711\ \text{mmHg}[/tex]

Explanation:

[tex]P_{total}[/tex] = Total pressure = 751 mmHg

[tex]P_{water}[/tex] = Vapor pressure = 40 mmHg

[tex]P_{gas}[/tex] = Pressure of gas

The total pressure in a system is given by Dalton's law

[tex]P_{total}=P_{gas}+P_{water}\\\Rightarrow P_{gas}=P_{total}-P_{water}\\\Rightarrow P_{gas}=751-40\\\Rightarrow P_{gas}=711\ \text{mmHg}[/tex]

The partial pressure of the hydrogen is [tex]711\ \text{mmHg}[/tex]

In Ionic compounds,metals____ valence electrons and nonmetals_____ valence electron

Answers

Answer:

bf v

Explanation:

bgf

POSSIBLE POINTS: 1

Please read the example carefully and choose the best answer below.

Marie notices that the current cleaner she is using on her shower is not cutting through the hard water build-

up that has accumulated. She decides to purchase 3 other cleaners to see if one of them will do a better job

of cutting through the stains. Marie places masking tape in the dry shower to create 5 sections for her

experiment. She sprays 3 squirts of one cleaner per section and leaves the remaining section untouched to

compare her results. After 30 minutes, and without scrubbing any of the cleaner in, she records her

observations.

In this example what is the independent variable?

Answers

Answer:

CLEANER

Explanation:

Independent variable is the variable in an experiment that is changed or manipulated by the experimenter in order to bring about a measurable response.

In this question, Marie notices that the current cleaner she is using on her shower is not cutting through the hard water build-up that has accumulated. She decides to purchase 3 other cleaners to see if one of them will do a better job of cutting through the stains. The CLEANERS being changed in this experiment is the INDEPENDENT VARIABLE.

State the law of conservation of mass in mathematical terms.

Answers

Answer:

The law of conservation of mass states that no atoms are lost or made in a chemical reaction. Instead, the atoms join together in different ways to form products . This is why, in a balanced symbol equation, the number of atoms of each element is the same on both sides of the equation.

Transpiration is C. The evaporation of water out of the stomata of plants B. The absorption of water through the roots D. The evaportation of water out of the roots A. Simple diffusion

Answers

Answer: Option C.

The evaporation of water out of the stomata of plants

Explanation:

The evaporation of water out of the stomata of plants is transpiration because transpiration is the evaporation or loss of water inform of vapor from the stomata of leaves or flowers. Water is first absorbed by the root and it is moved to plant parts including leaves by xylem vessels since the roots already retained which it can use and when the water get to the leaves, it is loss inform of water vapor.

PLEASE HELP!! WILL GIVE BRAINLIEST!!! I NEED ANSWER QUICKLY!!!

Check the correct box to describe the periodic trends in electronegativity.

Electronegativity across a period:
decreases.
increases.


Electronegativity down a group:

decreases.

increases.

Answers

Electronegativity across a period: increases.

Electronegativity down a group: decreases.

Explanation:

Just did on Edge 2021

Electronegativity across a period increases and Electronegativity down a group decreases.

What is Electronegativity ?

Electronegativity, symbolized as χ, is the tendency for an atom of a given chemical element to attract shared electrons when forming a chemical bond.

An atom's electronegativity is affected by both its atomic number and the distance at which its valence electrons reside from the charged nucleus.

On the periodic table, electronegativity generally increases as we move from left to right across a period and decreases as you move down a group.

As a result, the most electronegative elements are found on the top right of the periodic table, while the least electronegative elements are found on the bottom left.

Hence, Electronegativity across a period increases and Electronegativity down a group decreases.

Learn more about Electronegativity here :

https://brainly.com/question/17762711

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PLS HELP
True or False: Water molecules, as a liquid, are very spread apart because of their attractions for one another. *

Answers

Answer:

False

Explanation:

Water molecules are spread up but slightly, enough that none of the molecules actually move freely around each other. Only gas and plasma molecules are very spread apart.

why is water being on the moon important?

Answers

Answer:

In order for people to survive, we need water. If we wanted to live on the moon, we would need water.

Answer:

Gravity

Explanation:

So water on the moon turns into fine ice dust, when you pour it.

How do scientist respond to experimental observations that don’t match current theories?

Answers

Answer: The results of the experimental observations should coincide with the facts of the current theories.

Explanation:

The scientific theory can be defined as the well defined as supported explanation for a natural phenomena. It is based upon the facts observed and also supported by the evidences obtained from the experimental trials.

If the experimental observations do not match with the concept of current scientific theory then the scientific either perform the experiment with the same scientific methodology or can switch to another scientific methodology to satisfy the facts of the current theories.

What is the name AND mass number of an atom with 4 protons and 4 neutrons?

Answers

Be beryllium mass number: 9.012g
*4 protons is the atomic number btw just check your periodic table

what elements are the monomers of proteins made of?

Answers

Answer: Proteins are known as biomolecules and biomolecules are made of the elements Carbon, Hydrogen, Nitrogen, and Oxygen and the monomers of proteins are known as amino acids.

Urgent !!!!!!!!!! Due today plzzzzz help me

Answers

Answer:

Explanation:

a. H3O+

b.  H3O+

c. CH3C(OH2)+

Identify the following examples as either physical or chemical change.
(Ill give brainliest if right)

Answers

Answer:

19. Physical

20. Physical

21. Chemical

22. Physical

23. Chemical

24. Chemical

25. Physical

Explanation:

HELPP ME

express with equations the transformations marked on the scheme

Answers

Further explanation

The reaction equation is the chemical formula of reagents and product substances

A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products.

Transformations :

1. CaO + H₂O⇒Ca(OH)₂

2. CaO + CO₂⇒CaCO₃

3. Ca(OH)₂+ 2HCl⇒CaCl₂+2H₂O

4. Ca(OH)₂+H₂CO₃⇒CaCO₃+2H₂O

5. CaCO₃⇒CaO+CO₂

I need help with figuring out how to calculate the frequency of light, because my teacher's notes are generic. When I asked her about it on top of another question; she only answer that other question" and never talked about the notes.

Answers

Answer:

See explanation

Explanation:

The general formula used to obtain the frequency of a wave is;

v=λf

where;

v = speed of the wave

λ= wavelength of the wave

f= frequency of the wave.

Now, the speed and wavelength of light in various media are known.

If we plug the value of the speed of light and the wavelength of light into the formula given above, we can obtain the frequency of light.

The frequency of a photon of light can also be obtained from Plank's equation;

E= hf

where;

E =energy of the photon of light

h = Plank's constant

f= frequency of the photon.

This is used when the energy of the photon of light is supplied or can be calculated using the wavelength of light provided in the problem.

Help pls. Are they a pure substance or mixture?

Answers

Answer:

Pizza is difintly a mixture the other i have no idea..im pretty sure CO2 is a substance btw im sorry I wish I could help more Hope this helps! :)

Explanation:

Answer:

Mixture

?

Pure

Pure

Pure

Pure

Mixture

Mixture

Pure

Pure

Mixture

Pure

Explanation:The answers are on google. Im not sure what they mean by hunter.

What is the temperature of lukewarm water? Select the better estimate.
80°C
80°F

Answers

Answer:

80°F

Explanation:

Lukewarm means moderately warm. 80°C (176°F) water is extremely hot and could burn someone. 80°F (26 2/3°C) is moderately warm.

80F my good guy and have a good day

someone help me please i’ll give brainly

Answers

Answer:

solid

liquid

Gas

plasma

Highest to lowest energy : plasma, gas, liquids, solids

1 of 101 of 10 Items
00:04 / 30:00
Assessment started: Unit 3 Exam-Retest.
Item 1
If pressure is constant, how is the volume of a gas related to its temperature?

Answers

Answer:

A

Explanation:

Trust me i just did this :)

In the cell, amino acid molecules combine to form

Answers

Answer:

A polypeptide chain!

Explanation:

Hopefully this helps! If this wasn't the answer you were looking for please don't hesitate to comment here or private message me! Have a nice day/night! :))

Amino acids are the fundamental building blocks of proteins. In the cell, amino acid molecules combine to form polypeptide chain or protein.

What are amino acid ?

The term amino acids are defined as the building block of the protein. Amino acids are the fundamental building blocks of proteins. Their molecule contains both an amino and a carboxylic group.

Alpha-amino acids are amino acids that have an amino and a carboxyl group attached to the same carbon atom, i.e., an alpha-carbon atom. Glycine, Alanine, etc.

Proteins are made up of monomers called amino acids. A protein is composed of one or more linear chains of amino acids, each of which is referred to as a polypeptide.

Thus, In the cell, amino acid molecules combine to form polypeptide chain or protein.

To learn more about an amino acid, follow the link:

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What are the names, symbols, and atomic numbers of the nonmetal elements that are NOT gasses?

Answers

Seventeen elements are generally classified as nonmetals: most are gases (hydrogen, helium, nitrogen, oxygen, fluorine, neon, chlorine, argon, krypton, xenon and radon);


one is a liquid (bromine); and a few are solids (carbon, phosphorus, sulfur, selenium, and iodine). Metalloids such as boron, silicon, and germanium are sometimes counted as nonmetals.

ANSWER:

Liquid:
Bromine - Br - 35

Solid:
Carbon - C - 6
Phosphorus - P - 15
Sulfur - S - 16
Selenium - Se - 34
Iodine - I - 53


When magnesium ribbon reacts with steam, a solid called magnesium
oxide and hydrogen gas are formed. Which of the following is the correct
word equation?
O magnesium + hydrogen -> magnesium + water
magnesium + water -> magnesium oxide + hydrogen
O magnesium + water -> magnesium + hydrogen
O magnesium + magnesium oxide -> hydrogen + water

Answers

Answer:

magnesium + water == magnesium oxide + hydrogen

aluminum oxide is an ionic substance with formula al2o3. explain what this formula means.

Answers

Answer:

the 2 means there are 2 al and the 3 means there are 3 o

Explanation:

I hope this helps

How many moles are there in 3.612 x 1024 formula units of Na2SO4?

Answers

Answer:

Theanswer is 6 moles

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

[tex]n = \frac{N}{L} \\ [/tex]

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

[tex]n = \frac{3.612 \times {10}^{24} }{6.02 \times {10}^{23} } \\ [/tex]

We have the final answer as

6 moles

Hope this helps you

If the solid, liquid, and gas forms of a substance
are made up of the same type of particles, How
could a substance change from one state to
another?

Answers

presence of heat can change solid tu liquid

and liquid to gas

Select the correct answer. Which substance is made of polymers? A. marble B. protein C. salt D. steel

Answers

Answer:

the answer is B proteins

Explanation:

brainliest pls

Answer:

B. protein

Explanation:

A polymer is defined as a molecule which has 'n' number of monomer units.

Similarly proteins are also polymers as they are made up of amino acids and contain a number of repeated units just like polymers.

What information can a foliated metamorphic rock provide you about the conditions under which it formed?

Answers

A foliated rock forms when the minerals are realigned due to the presence of high temperature and pressure. The minerals align in such a way that the axes are directed to where the pressure was applied.

Which explains how to balance the equation ZnSO4 + Li2CO -> ZnCO3 + Li2SO4 ?

A. One reactant and one product needs the coefficient 2.
B. The products both need a 3 coefficient.
C. The reactants both need a 2 coefficient.
D. Atoms in the equation are already balanced. ​

Answers

Explanation:

Atoms in the equation are already in balance.

Answer:

it is d, got it right on EDG

Explanation:

Which of the following is not likely to occur if a city loses its tax base due to economic decline? A. The city will have fewer police and fire fighters. B. City residents will have adequate health care and hospital services. C. The city will have a decline in public housing. D. Public and private buildings will decay.

Answers

Answer:

B.

City residents will have adequate health care and hospital services.

Explanation:

the correct answer for edg 2020

Answer:

B

Explanation:

The particles in liquids and gases show random motion. What does that mean and why does it occur??

Answers

Answer:

Liquids and gases show random movements because of potential and kinetic energy.

It happens when heat is applied to the particles and they gain more potential and kinetic energy and move around faster. With gases, they have the most energy.

If anything doesnt make sense, make sure to message me

Answer:

The particles show random motion because liquid and gas particles do not have a rigid structure, unlike solid particles. They are free to go anywhere.  

Explanation:

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