Calculate the energy of a photon of light emitted from a hydrogen atom when an electron falls from level n

Answers

Answer 1

Answer:  E

1

E

4

=

Δ

E

=

2.18

×

10

18

J

(

1

n

2

f

1

n

2

i

)

=

2.18

×

10

18

J

(

1

1

2

1

4

2

)

=

2.18

×

10

18

J

(

15

16

)

=

 

2.04

×

10

18

J

After you obtain the energy, then you can realize that that energy has to correspond exactly to the energy of the photon that came in:

|

Δ

E

|

=

E

photon

=

h

ν

=

h

c

λ

where  

h

is Planck's constant,  

c

is the speed of light, and  

λ

is the wavelength of the incoming photon. Thus, the wavelength is:

λ

=

h

c

E

photon

=

(

6.626

×

10

34

J

s

)

(

2.998

×

10

8

m/s

)

2.04

×

10

18

J

=

9.720

×

10

8

 

m

=

 

97.20 nm

Explanation:


Related Questions

Describe how the temperature change suggests a chemical change occurred?

NO LINKS PLEASE

Answers

Answer:

When energy is either absorbed or released, it is indicative of a chemical change. Fireworks are an example of a chemical change that produces a temperature change and emits light.

. What were the factors responsible for the change of dead organic matter into fossil fuels?​

Answers

Given enough pressure, organic matter can also become natural gas. Heat and pressure are the two main forces that transform organic matter into fossil fuels.

Mark Brainliest please

construct a Device to Regulate the
Release of Energy - Student Guide
PLEASE WRITE IN LAB REPORT FORM ASAP PLEASE HELP 75 POINTS WILL MARK BRIANLIEST

Answers

Answer:

Hi there

Thermal Energy and Chemical Reactions

The device controlled the activation as shown by the water holding room temperature for 15 seconds until activation by crushing the pills. The temperature rose 30° over two minutes,showing a measurable exothermic reaction from the Calcium Chloride dissolving in the water.

Pour 5mL water in a quart bag

Place Thermometer in the bag to make contact

Fill two gelatin 000 capsules with 1 gram of Calcium Chloride

Place capsules into the bag

Wait 15 seconds to crush the capsules while they are submerged in the water

-Temperature

0 seconds 75 degrees

15 seconds - Activation 75 degrees

30 seconds 85 degrees

60 seconds 95 degrees

90 seconds 104 degrees

120 seconds 105 degrees

Conclusion: During a reaction, thermal energy from the environment is converted into chemical energy stored in the products.

Brainliest plz

Plz help I’m pretty confused on this question

Answers

Answer:

Bohr model A

Explanation:

It has more valance electrons therefore has more interaction between the atoms and has more electronegativity.

how many of the following elements have 2 unpaired electrons in the ground state?

Answers

Answer:

I'll h he d Glendale https hehe

Explanation:

grendel v BB hehe iron v

Which of the following is the best definition of deposition in geology?(1 point)

A:the creation of volcanic rock when liquid magma hits the ocean and cools

B:the mixing of many layers of sediment by wind, water or ice


C:laying down of sediment in layers carried by wind, water or ice


D:the creation of any metamorphic rock

Answers

Answer:

Deposition is the laying down of sediment carried by wind, flowing water, the sea or ice. Sediment can be transported as pebbles, sand and mud, or as salts dissolved in water.

When glucose is broken down in an atmosphere where oxygen supply is limited, a 3-carbon compound known as ________ accumulates in the muscle.

Answers

Answer: Lactate!

Explanation:Hope this helps!!!

What's a suitable assumption for a simple distillation lab?​

Answers

Answer:

Must be stable and relatively insoluble in boiling water.

Explanation:

it must be stable and relatively insoluble in boiling water and a must-have vapor pressure in boiling water that is of the order atmosphere at or more compound satisfy these conditions that will generally not separate from each other but we'll be separated from everything else.

what happens when phosphorus forms an ion?

Answers

Answer:

Phosphorus would form a -3 charge

Explanation:

Phosphorus has five outer electrons that can bind  atoms. As a result, Phosphorus forms a ion has a charge of -3.

1. A box of hardware contains 100 pieces. Assuming there are 25 pieces in each vial, calculate the
mass of a box of each kind of hardware. Express these values in units of g/box

Answers

Answer:

fofo you for your patience and

The question is incomplete.

Following things are required to solve the question:-

Mass of the vileMass of the pieces

Without the information we can not solve the question. Therefore, please provide with the incomplete information.

For more information, refer to the link:-

https://brainly.com/question/2817451

What is the average acceleration of the car between 24 and 40 seconds? Include the correct units.

Answers

Answer:

16

Explanation:

40 - 24  16

how many valence electrons are there in an argon atom?

Answers

Answer:

There are 8 valence electrons in an argon atom.

A gas held in a balloon at 5L has its temperature doubled. What will the new volume of the balloon be?

Answers

Answer:

2.5l

Explanation:

They higher the temprature the higher the volume

How many protons,neutrons and electrons make a hydrogen atom

Answers

Explanation:

A hydrogen atom has an atomic number of 1.

So it's proton number will always be 1.

A neutral hydrogen atom does not have any charge.

So it has the same amount of electrons as protons, which turns out to be also 1.

A neutral hydrogen atom has an atomic mass of ≈1.00794amu≈1amu.

To find the amount of neutrons, we take the proton number and subtract it from the mass number.

1−1=0

So a neutral hydrogen atom has no neutrons.

In summary,

A hydrogen atom has

1 proton

1 electron

0 neutrons

another way of explaining:

The number of protons is the atomic number, and the number of protons plus neutrons is the atomic mass. For hydrogen, the atomic mass is 1 because there is one proton and no neutrons. For helium, it is 4: two protons and two neutrons

With which instrument can you measure the mass of a solid?

Answers

You can use Balances and Scales..

For the majority of everyday objects, a balance is used to determine an object's mass. The balance
compares an object with a known mass to the object in question. Different types of balances include digital
digital scientific balances and beam balance

The travel of speed of an electromagnetic wave of 2.8cm wavelength and of 1.1×10^10 Hz frequency is.........



3.92m/s

0.25m/s

30.8m/s

3×10^8m/s



Answer and I will give you brainiliest ​

Answers

Answer:

wer

c=3.00×108 m/s (the speed of light in a vacuum) λ = wavelength in meters ν = frequency in Hertz (Hz) or 1s or s−1 .

Explanation:

I might be wrong also you don't have to give me brainliest save it for someone else who knows I might be wrong

An unknown substance was put in a container. The substance filled up the container from bottom up, taking half of the space in the container.

What is most likely the state of matter of the substance?

Gas
Liquid
Plasma
Solid​

Answers

According to the forces of attraction, the most likely state of matter of the substance mentioned is liquid.

What is matter?

Matter in chemistry, is defined as any kind of substance that has mass and occupies space that means it has volume .Matter is composed up of atoms which may or not be of same type.

Atoms are further made up of sub atomic particles which are the protons ,neutrons and the electrons .The matter can exist in various states such as solids, liquids and gases depending on the conditions of temperature and pressure.

The states of matter are inter convertible into each other by changing the parameters of temperature and pressure.According to law of conservation of matter , matter can neither be created nor destroyed only its state changes .

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#SPJ2

Answer:

liquid

Explanation: liquid conforms to the shape of the container which it is held in.

I NEED HELP
so is for example
FeO + H2O ---> Fe(OH)2
And
Fe + 2H20 ---> Fe(OH)2 + H2
The same? Same thing for other metals

Answers

Answer:

no

Explanation:

because when is iron oxide + water given you iron hydroxide while the other one is Iron plus 2 moles of water giving you iron hydroxide and hydrogen

Step 2: Predict the Number of Nuclei at Each Half-Life
0.5"
Using the values from Step 1, predict the pattern
for the decay of 100 atoms over the course of eight
half-life cycles, Round to the nearest whole
number of atoms. Record in the appropriate
blanks
Time- Half-
Life Cycles, no
Initial
Radioactive Atoms
(Predicted)
100
1
1
0.5
А
2
0.25
A= 27
25
3
0.125
B
B = 16
4.
0.0625
6
C = 9
5
0.03125
С
D=4
6
0.015625
D
7
0.0078125
1
E
8
0.00390625
E
DONE
) Intro

Answers

Answer:

A=50

B=13

C=3

D=2

E=0

Explanation:

the natural enzyme reaction in food slowly breaks it down and eventually causes it to spoil. what 2 things halt this enzyme reaction and help preserve the food?
microwaving
cooking at high temperature
storing properly in the refrigerator
blanching and canning

Answers

The two processes that help to preserve food are; storing properly in the refrigerator  as well as blanching and canning.

Enzymes are biological catalysts that promote several reactions in the body. The spoilage of food is affected by the enzymes present in food. They act slowly, causing the food to spoil.  

However, there are two way to protect a food from spoilage. These are;

storing properly in the refrigerator blanching and canning

These processes slow down the action of these enzymes that are responsible for the spoilage of food thereby enabling the food to last longer.

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the largest source of anthropogenic greenhouse gases in the united states is

Answers

Answer:

Human activities are responsible for almost all of the increase in greenhouse gases in the atmosphere over the last 150 years. The largest source of greenhouse gas emissions from human activities in the United States is from burning fossil fuels for electricity, heat, and transportation.

What is the wavelength, in nm, of the light photon emitted by a hydrogen atom when an electron goes from n

Answers

Answer:

Hence, the wavelength of the photon associated is 1282 nm.

Explanation:

How does the space between particles change as energy is added

Answers

When energy is added to them the space between the particles slowly increases and when energy is lost it slowly decreases.

what is the name of an orchestra that performs the ceremonial music of the royal courts and templates of cambodia
a.ankor wat
b.oneat
c.pinpeat
d.samphor​

Answers

Answer:

pinpeat

According to 3 sources

The pinpeat (ពិណពាទ្យ) orchestra or musical ensemble performs the ceremonial music of the royal courts and temples of Cambodia. The orchestra consists of approximately nine or ten instruments, mainly wind and percussion (including several varieties of xylophone and drums)

Explanation:

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A compound is 2. 00% H by mass, 32. 7% S by mass, and 65. 3% O by mass. What is its empirical formula? The first step is to calculate the mass of each element in a 100-g sample of the compound. We use 100 g because it makes the calculations more straightforward. What is the mass of each element in a 100. 0-g sample of the compound? mass H = g mass S = g mass O = g.

Answers

Answer:

We assume that there is 100g of the compound (because it makes it easier to calculate) and we turn the percentages into grams.

2% of Hydrogen = 2g of H

32.7% of Sulfur = 32.7g of S

65.3% of Oxygen = 65.3g of O

Now we change the mass of these elements to moles by dividing the mass by the molar mass (which is the value of atomic mass on your periodic table)

2g/1.01g = 1.98 mol

32.7g/32.06g = 1.02 mol

65.3g/16g =4.08 mol

divide all these mol values by the smallest mol value, which is 1.02. (Round the values to whole numbers)

1.98/1.02 = 2 (rounded) of Hydrogen

1.02/1.02 = 1 of Sulfur

4.08/1.02 = 4 of Oxygen

H2SO4 (also known as sulphuric acid) is your empirical formula.

MULTIPLE CHOICE
What is the molality (m) of 3.5 mol of sugar in 2.5 kg of water?

Answers

The molality of the solution is 1.4 moles per kilogram (molal).

The molality of the solution is equal to the number of moles of sugar (solute) divided by the number of kilograms of water (solvent). Hence, the molality is determined below:

[tex]m = \frac{3.5\,mol}{2.5\,kg}[/tex]

[tex]m = 1.4\,\frac{mol}{kg}[/tex]

The molality of the solution is 1.4 moles per kilogram (molal).

We kindly invite to check this question on molality: https://brainly.com/question/4580605

What will a wave look like with high amplitude and long wavelength?
A. Tall and narrow
B. Short and narrow
C. Tall and wide
D. Short and wide​

Answers

Answer:

A tall and narrow A tall and narrow

Explanation:

Answer:

A. Tall and Narrow

Explanation:

The frequency of a wave is inversely proportional to its wavelength. That means that waves with a high frequency have a short wavelength, while waves with a low frequency have a longer wavelength. But high amplitude waves tend to be short spent and tall narrow linings.

Write a 4-6 sentence paragraph using science vocabulary, full sentences, proper grammar, and details explaining the difference between plant cells and animal cells. Science...

Answers

Answer:

Plant cells and animal cells are both eukaryotic cells. They both have a nucleus, Golgi complex, endoplasmic reticulum, ribosomes, mitochondria, cytoskeleton and cell membrane. Only plants cells have a vacuole, cell wall and chloroplast, while animal cells have cilia, centrioles and lysosomes which plant cells don't usually have. Because of their cell walls plant cells are in rigid rectangular shapes while animal cells have looser round shapes. The main difference in their functions is that animals don't produce their own food while plan cells do.

which choice is an element? Air, oxygen, water, or sodium cholride

Answers

Answer:

Oxygen is an element.

Explanation:

Out of the choices listed, oxygen is the only element. The other choices are incorrect because air is a mixture of nitrogen, oxygen, carbon dioxide, water vapors, and some other gases; water is a compound of hydrogen and oxygen; and sodium chloride is a compound of sodium and chloride ions; meanwhile, oxygen is a pure element.

Question 1 (2 points)
Which option can be classified as a pure substance?

Question 1 options:

heterogenous mixture


solution


homogenous mixture


compound

Question 2 (2 points)
Law of conservation of mass states that:

Question 2 options:

matter is destroyed


matter does not change


matter is neither created nor destroyed


matter is created

Question 3 (2 points)
What is a property of bases?

Question 3 options:

all of the above


Sour taste


Slippery touch


Ability to form hydronium ions+

Question 4 (2 points)
Which property do solutions with low pH values have?


What does it mean to have a neutral pH? - Aseptic Health

Question 4 options:

have a -OH group


feels slippery


turns litmus paper blue


tastes sour

Question 5 (2 points)
How do the products of chemical reactions compare to their reactants?

Question 5 options:

The products often have completely different properties than the reactants.


The products are usually more toxic than the reactants.


The products usuallyhave more mass than the reactants.


The products usually have more atoms than the reactants.

Question 6 (2 points)
Which of the following is an example of a physical change?

Question 6 options:

Water freezing into ice.


A piece of wood burning.


A toy car rusting.


Zinc producing hydrogen gas when mixed with water.

Question 7 (2 points)
What might happen if you mixed a strong acid with an equally strong base?

Question 7 options:

You would see an explosive chemical reaction.


The base would destroy the acid.


You'd wind up with a pH-neutral salt and water.


The acid would destroy the base.

Question 8 (2 points)
In the equation shown, what are the reactants?

2H2+O2àH2O

Question 8 options:

Hydrogen and oxygen molecules (2H2 and O2 )


Ice crystals


Hydrogen atoms (H)


Water molecules (H2O)

Question 9 (2 points)
Which phrase most accurately describes a chemical change?

Question 9 options:

A change in form


A change in taste


A change on the molecular level


A change in appearance

Question 10 (2 points)
What does it mean when there is a physical change?

Question 10 options:

A new substance has been formed.


Matter has changed from one substance into a new substance.


Matter has changed size, shape or form


Matter has changed on the molecular level.

help pls ill give 20 points!

Answers

Answer:

I didn't KNOW WHAT IS THE ANSWWR OF YOUR QUISTION IM SO SORRY

Explanation:

I WANT TO INTRODUCE SELF TO YOU CAN I

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