What is the wavelength of a light frequency 7.21x10^14Hz

Answers

Answer 1

Answer:

6.0 x 105

Explanation:

Answer 2

Answer:6.0 x l05

Explanation:


Related Questions

How many electrons with chlorine (Cl) in group 17 gain to become stable?

Answers

I think it’s 7? I’m
Not fully sure but when I had this question I put 7 & it was right.

Answer:

Sodium is in group 1 so it has 1 valence electron (one electron in its outer shell). Sodium will be looking to lose its one valence electron in order to become more stable. Chlorine is in group 17 so it has 7 valence electrons, and therefore only needs to gain one valence electron to attain noble gas electron configuration (become stable with 8 valence electrons, just like the noble gases in group 18 have 8). Because the chlorine atom is trying to gain one electron, and the sodium atom is trying to lose one, sodium will give up its one valence electron to chlorine and the two atoms will form an ionic bond. Because chlorine is looking to gain just one electron and sodium is looking to lose the same number, the ratio of chlorine atoms to sodium atoms will be 1:1, one chlorine atom per one sodium atom.

Explanation:

What is the mole fraction of Ba(OH)2 in an aqueous solution that contains 22.8% Ba(OH)2 by mass?

Answers

Answer:

0.03

Explanation:

22.8 g Ba(OH)2 (1 mol Ba (OH)2/ 171.34 g) = 0.133 mol Ba (OH)2

77.2 g H2O (1 mol H2O/18 g) = 4.29 mol H2O

X= molar fraction= mol Ba(OH)2/ mol total

X= 0.133/ (0.133+4.29) = 0.03

0.03 is the mole fraction of [tex]Ba(OH)_2[/tex] in an aqueous solution that contains 22.8% [tex]Ba(OH)_2[/tex] by mass.

What is a mole fraction?

The ratio of the number of moles of one component of a solution or other mixture to the total number of moles representing all of the components.

Moles of [tex]Ba(OH)_2[/tex]

Moles = [tex]\frac{mass}{molar \;mass}[/tex]

Moles = [tex]\frac{22.8 g Ba(OH)_2}{171.34 g}[/tex]

= 0.133 mol [tex]Ba (OH)_2[/tex]

Moles of [tex]H_2O[/tex]

[tex]Moles = \frac{mass}{molar \;mass}[/tex]

[tex]Moles = \frac{77.2 g H_2O}{18 g}[/tex]

= 4.29 mol [tex]H_2O[/tex]

The mole fraction of [tex]Ba(OH)_2[/tex]

[tex]\frac{mol Ba(OH)_2}{total \;mol}[/tex]

= 0.03

0.03 is the mole fraction of [tex]Ba(OH)_2[/tex] in an aqueous solution that contains 22.8% [tex]Ba(OH)_2[/tex] by mass.

Learn more about the mole fraction here:

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How is a lithium atom (Li) different from a lithium ion (Li+)?

Li has fewer electrons than Li+
Li has more electrons than Li+
Li has fewer protons than Li+
Li has more protons than Li+

Answers

Answer:

Li has fewer protons than Li+

Li has fewer electrons than Li+

1. Which gas will move faster through a small opening hydrogen or oxygen? *
A)hydrogen
B) oxygen

Answers

Hydrogen because oxygen gas will excuse 4 times slower than hydrogen gas !

Answer:

hydrogen

Explanation:

________________ substances have an equal amount of H+ and OH- ions in solution.

Answers

A neutral solution will have H+ ions equal to OH- ions. I think this should be the answer hhhh

Answer:

Water, and other neutral

Explanation:

That means those substances have pH = 7.

When the amount of H+ is more than the amount of OH- in solution, the substance is acidic ( eg.: Lemon juice ). pH < 7

When the amount of H+ is less than the amount of OH- in solution, the substance is basic ( eg.: Baking soda ). pH > 7

Relate dark matter to the development of the universe after the Big Bang. In 3-5 sentences, speculate on how the development of the universe would have been different if there had been no dark matter. In your answer, use the term structures.

Please answer this and ill mark you as brainliest

Answers

Answer:

Dark matter also called baronic matter is the matter that makes up 27% of the universe.

In 1933 it was determined as that mass that cannot be seen, that is, the non-visible mass of outer space.

Dark matter also plays a central role in the formation of structures and the evolution of galaxies and has measurable effects on the anisotropy of cosmic microwave background radiation. The composition of this matter is unknown today.

The dark matter component has considerably more mass than the "visible" component of the Universe.

Explanation:

There are certain researchers who say that the appearance of dark matter was before the appearance of the big bang.

A relevant fact of this matter is that dark matter exerts gravity, and that gravity affects the movements of objects.

Despite the fact that nothing is known about its origin, astronomers have amply demonstrated that dark matter plays a determining role in the formation of galaxies and galactic clusters, which could not maintain their cohesion without its existence, but many doubt that it is the remainder / remnant or product of a big bang.

A community includes
A. all of the living organisms in a specific place at a specific time,
B. all plants, animals, minerals, and water in a specific place at a specific time,
C. only the plants in a specific place at a specific time.
D. only the animals in a specific place at a specific time.

Answers

Answer:
A. all living organisms in a specific place at a specific time

Answer:

answer: A. all of the living organisms in a specific place at a specific time

Explanation:

How much NaOH (in grams) is needed to prepare 463 mL of solution with a pH of 10.020?

Answers

Answer: [tex]1.94\times 10^{-3}g[/tex] of NaOH

Explanation:

pH or pOH is the measure of acidity or alkalinity of a solution.

pH is calculated by taking negative logarithm of hydrogen ion concentration.

[tex]pH=-\log [H^+][/tex]

Putting in the values:

[tex]10.020=-\log[H^+][/tex]

[tex][H^+]=9.55\times 10^{-11}[/tex]

[tex][H^+][OH^-]=10^{-14}[/tex]

[tex][OH^-]=\frac{10^{-14}}{9.55\times 10^{-11}}=1.05\times 10^{-4}M[/tex]

[tex]NaOH\rightarrow Na^++OH^-[/tex]

[tex]Molarity=\frac{moles\times 1000}{\text {Volume in ml}}[/tex]

[tex]1.05\times 10^{-4}M=\frac{moles\times 1000}{463ml}[/tex]

moles = [tex]4.86\times 10^{-5}[/tex]

Mass of [tex]NaOH=moles\times {\text {Molar mass}}=4.86\times 10^{-5}\times 40=1.94\times 10^{-3}g[/tex]

Thus [tex]1.94\times 10^{-3}g[/tex] of NaOH is needed to prepare 463 mL of solution with a pH of 10.020

Need help with these three pls!!!!!

Answers

True because

False

True
1) true , 2) false , 3) true


Which is usually associated with a slower reaction rate?
A. using a whole solid in the reactants
B. adding heat energy to the reactants
C. adding food coloring to the reactants
D. using a strong solution of the reactants

Answers

A. Using a whole solid in the reactants
using a whole solid in the reactants

Which situation describes why a rock sinks in water?
A. Air pressure is greater than the buoyant force.
B. The force of gravity is greater than the buoyant force.
c. The buoyant force is greater than the force of gravity.
D. The rock is less dense than water.

Answers

Answer:

b

Explanation:

Why is the reaction SO2 + H20 → H2SO2 not balanced?
A. The oxygen atoms are in two molecules on one side, but one in
the other.
O
B. There are more molecules on one side than on the other.
O
C. There are more oxygen atoms on one side than on the other.
O
D. The sulfur atom is in different places in reactant and product
molecules
SUBMIT

Answers

Answer: C

# The main reason why the reaction above can not be balanced is:

   This chemical reaction SO2 + H2O -> H2SO2 is not correctly written.

    It must be: SO2 + H2O -> H2SO3

Explanation:

Note 1:

H2SO2 can be produced by the other chemical reaction:

2H2O + SCl2 -> 2HCl + H2SO2

....

Note 2: Answer A is false

As you can see in the reaction  SO2 + H2O -> H2SO3, the oxygen atoms are in two molecules on one side, but one in the other - However, this reaction is written correctly.

Note 3: Answer D is false

Of course the Sulfur atom must be placed in different places: in reactant and product molecules.

Note 4: Answer B is false

There are different kinds of chemical reactions, and this is normal that there are more molecules on one side than on the other.

The answer is C

The correct way to balance the reaction, would be to write it as SO2 + H2O →  H2SO3

Answer A is incorrect.

The oxygen atoms in the reaction SO2 + H2O -> H2SO3 are in two compounds on one end but on the other, it is in just one.

Answer D is wrong.

The sulfur atom has to be in the reactants and the products.

Answer B is not correct.

There are many types of chemical reactions . One side commonly has more atoms than the other.

After brushing, Fluffy's fur has a charge of +8.0 x 10' coulombs and her plastic brush has a charge of -1.4 x 10-8 coulombs. If the distance between the fur and
brush is roughly 5.0 * 10 meters, what is the approximate magnitude of the force between them?
(k = 9.0 * 10 newtonmeters/coulomb?)
A 5.0 x 106 newtons
B.
2.0 x 10-4 newtons
C
4.0 x 106 newtons
D. 2.5 x 10 newtons
Reset
Next
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SUS

Answers

Answer:

jeez thats some calculus stuff right there im pretty sure its b

Explanation:

Is the equation Zn+HCl > ZnCL2+H2 unbalanced or balanced

Answers

Answer:

unbalanced

Explanation:

Cl and H have an extra atom

- Hope that helps! Please let me know if you need further explanation.

balancing equations

Answers

Answer:

4. 1HCL + 1NAOH- I NACL+1H2O

Explanation:

there is 2 hydrogens on the left side of the equation, balancing out to the other side of the equation. everything else would be balanced out too

how does atomic spectrum differ from continuous spectrum​

Answers

Answer:

A continuous spectrum is a record formed by collecting light of all frequencies traveling through space together. ... A line spectrum is a record formed by collecting light emitted from excited atoms whose electrons are falling back down to lower energy states.

Explanation:

Which of these Electromagnetic waves has the most kinetic energy and can be
dangerous?
O radio waves
O gamma rays
O ultraviolet waves
O visible light

Answers

Answer:

Gamma Rays.

Explanation:

Gamma-ray photons have the highest energy in the EMR spectrum and their waves have the shortest wavelength.

NEED HELPPP PLSSSSSSSSSS

Answers

I would pick the first option in the third option

Proper lane placement can include positioning your car...
A. away from other cars.
B. 36 inches from the right or left line.
C. one inch from either lane line.

Answers

B. 36 inches from the right or left

Proper lane placement can include positioning your car 36 inches from the right or left line. Therefore, option B is correct.

What is lane positioning ?

Using different lane positions to make adjustments for potential problems and create larger space between car and problem situations. Lane position is the placement of car in the center, on the right, or on the left of a lane.  The width of a lane is twelve feet on most highways or streets.

There are three main positions are lane position 1 is center of lane, lane position 2 is left side, and lane position 3 is right side. Position 2 is left side of lane is for car.

Position 3 is a vehicle placement to the right when a restriction to path of travel or your line of sight occurs. Proper lane placement can include positioning your car 36 inches from the right or left line.

Thus, option B is correct.

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List and describe the steps of energy transfers that occur that allow a digital recording to be played through a speaker and ultimately become sound waves.

Answers

Answer:

1) Sound waves are stores as electrical signal in the digital recording.

2) the electrical signal of the digital recording is transcribed and sent to the voice coils.

3) the voice coil changes this electrical signal into varying magnetic fields.

4) The magnetic field pushes and pulls the diaphragm of the speakers.

5) the pushing and pulling of the diaphragm generates sound waves in the speaker.

Balance the following equation by adding the correct mole numbers.
P⁴+Cl²->PCl³​

Answers

Hey there!

P₄ + Cl₂ → PCl₃

First, let's balance Cl.

There are 2 on the left, and 3 on the right.

To balance this, let's put a coefficient of 3 in front of Cl₂ and a coefficient of 2 in front of PCl₃.

P₄ + 3Cl₂ → 2PCl₃

Now we have 6 on the left and 6 on the right.

Next, let's balance P.

There are 4 on the left and 2 on the right.

Let's change the coefficient in front of PCl₃ from 2 to 4.

P₄ + 3Cl₂ → 4PCl₃

There are now 4 P on each side.

However, now Cl is unbalanced, with 6 on the left and 12 on the right.

We can change the coefficient in front of Cl₂ from 3 to 6.

P₄ + 6Cl₂ → 4PCl₃

So now, we have 4 P on each side and 12 C on each side.

This is our final balanced equation.

Hope this helps!

Answer:

1:1

Explanation:

Took test

What is the answer ?

Answers

Answer:

b

Explanation:

Electromagnetic waves are waves that have no medium to travel whereas mechanical waves need a medium for its transmission.

B. If the sand you ran across has a specific-heat capacity of 835 J/(kgºc),
how much energy must be added to a 2-kilogram pile of it to increase its
temperature from 40°C to 50°C? Show your work. (3 points)

Answers

Answer: 16700 Joules

Explanation:

The quantity of heat required to raise the temperature of a substance by one degree Celsius is called the specific heat capacity.

[tex]Q=m\times c\times \Delta T[/tex]

Q = Heat absorbed = ?

m = mass of sand = 2 kg

c = heat capacity = [tex]835J/kg^0C[/tex]

Initial temperature  = [tex]T_i[/tex] = [tex]40^0C[/tex]

Final temperature= [tex]T_f[/tex]  = [tex]50^0C[/tex]

Change in temperature ,[tex]\Delta T=T_f-T_i=(50-40)^0C=10^0C[/tex]

Putting in the values, we get:

[tex]Q=2kg\times 835J/kg^0C\times 10^0C[/tex]

[tex]Q=16700J[/tex]

16700 J of energy must be added to a 2-kilogram pile of it to increase its temperature from 40°C to 50°C

how does the sun light affect earths climate

Answers

Answer:

The Sun powers life on Earth; it helps keep the planet warm enough for us to survive. It also influences Earth’s climate: We know subtle changes in Earth’s orbit around the Sun are responsible for the comings and goings of the past ice ages. But the warming we’ve seen over the last few decades is too rapid to be linked to changes in Earth’s orbit, and too large to be caused by solar activity

Explanation:

Review the following chemical equation: Find the molar ratio between C6H6 to
carbon dioxide, CO2. 2C6H6 + 1502 YEILDS 6H20 - 12C02

Answers

Answer:

[tex]\frac{1}{6}[/tex]

Explanation:

Molar ratio is defined as the ratio of number of moles of reactants or products in a balanced chemical equation.

In this balanced equation, the number of C6H6 molecules react to form 12 CO2 molecules.

Thus, the molar ratio between C6H6 to  carbon will be equal to 2 moles of  C6H6 divided by 12 moles of CO2

[tex]\frac{2}{12}\\\frac{1}{6}[/tex]

Create a Element #Brainliest Challenge

Rules- It must Have Atomic mass and Number and it's Fictional name you created

For Fun Add #GoGenius​

Answers

Answer:

NeHe

Explanation:

Atomic Mass: 24.182302

Number: 18

I don't know, I just made it up.

How many total atoms from Carbon are present on the reactant side?
20 points
2CH2+202
O2+HC4
5
2
1
3

Answers

Answer:

2 carbon atoms/molecules are present on the reactant side.

hope it helps!

What is the correct answer? Please

Answers

Answer:

c

Explanation:

when the surface of a mirror curves inward, like the inside of a bowl, it is called a ____.
A) plane mirror
B) convex mirror
C) concave mirror
D) diffuse mirror

Answers

Answer:

C

Explanation:

The answer is always C

Answer:C. Concave mirror

Explanation:

When the surface of a mirror curves inward, like the inside of a bowl, it is called c. Concave mirror.

please helpppppppppp

Select the TRUE statements about the carbon cycle

The carbon cycle is the process in which carbon travels from the atmosphere into organisms and the Earth and then back into the atmosphere.
Plants take carbon dioxide from the air and use it to make food.
Animals eat food and the carbon is stored in their bodies or released during cellular respiration.
Water (H2O) is cycled around the Earth

Answers

the carbon cycle is the process in which carbon travels from the atmosphere into organisms and the earth and then back into the atmosphere

Other Questions
Explain how an electrical current is produced. A random sample of n = 45 observations from a quantitative population produced a mean x = 2.5 and a standard deviation s = 0.26. Your research objective is to show that the population mean exceeds 2.4. Calculate the p-value for the test statistic z = 2.58. (Round your answer to four decimal places.) compare world war I and world war II 30 POINTS PLEASE ANSWER CORRECTLY AND CLEARLY THANK YOU!Which expression represents the growth of an investment of $1,500 at 12% per year for a period of t years?A. 1500(12)tB. 1500(0.12)tC. 1500t1.12D. 1500(1.12)t 1. It is made up of white and red blood cells and platelets and carries oxygen to organs aroundthe body answer 2. This is developed by the body's defense system to destroy pathogens.Answer:3. Resistance to a particular disease.Answer:4. A wall-like, first line of defense against disease, illness and pathogens.einer5.it trash pathogens and foreign mucus and cilia 6.this is a part of a pathogen that signal the body immune system to respond what is the change in size of a group of organisms of the same species over time A) population growthB) death rate C) birth rateD) immigration and emigration b) Imagine that you earned $8,425 in one year. If the government enforces a 15% income tax, howmuch money would you owe in taxes at the end of the year? Show your work. (5 points) which one isnt a function ? On January 1, 2021, Legion Company sold $250,000 of 6% ten-year bonds. Interest is payable semiannually on June 30 and December 31. The bonds were sold for $163,976, priced to yield 12%. Legion records interest at the effective rate. Legion should report bond interest expense for the six months ended June 30, 2021, in the amount of: (Round your answer to the nearest dollar amount.) But if he is suffered to live, he will receive the worst punishment - obscurity - and the public will have nothing to admire. We also know, and we can not consider it too much, that he has killed no man, and that if he be put to death we shall have the anomaly [odd situation] of the victim surviving the murderer; and that, under the laws, this man can be punished only for assault and battery with intent to kill, and, therefore, imprisoned.Background: This passage is an excerpt from William E. Dosters defense of Lewis Powell.According to the passage, what does Doster suggest that Powells punishment should be?becoming anonymous to the public becoming a hero and admiredbecoming a prisonerbecoming a victim of murder If you answer can you write how you solved it? what is the significance of the use of the word deliberately Sodium ions are used by your body every time you move a muscle. Determine the difference between the sodium ion and the sodium atom by using the model below. What is the volume, in cubic m, of a cube with an edge length of 18m? 2 PointsYoa Elena. There are 0.55 moles of carbon dioxide gas in a 15.0 L container. This container is at a temperature of 300 K. What is the pressure of the gas inside the container? Use 8.31 L*kPa/mol*K for the gas constant.A.)760 mm Hg\B.) 271 kPaC.) 2 atmD.) 91.4 kPa PLEASE HELP MEE :)40 POINTS WILL MARKE BRAINLIESTWhich would be the best name for afunction that takes the time spentheating a kettle and returns thetemperature of the kettle?Both of possible:-)) Help plz. Easy 20 pointsThe Landlady you notice that it ends suddenly, leaving you wondering what happens next.Continue Dahls story by creating an alternative ending. Be creative and use the foreshadowing clues from the story. (Minimum of 2-3 well developed paragraphs of at least 7 sentences each.)The landlady by Ronald Dahl Plz help Miche found that most helicopters fly at speeds of less than 270 kilometers per hour. Her work is shown below. s > 270 A number line going from 260 to 285. An open circle is at 270. Everything to the right of the circle is shaded. Which mistakes did she make? Check all that apply. 1. What side in the second trapezoid corresponds to CD?choices:RUSTTURS2. What angle in the second trapezoid corresponds to B?choices:TSUR