Ok take two tell me if u can see it or not it's #9

Answer:

B

Explanation:

We can use Planck's equation. Recall that:
[tex]\displaystyle E = h\nu[/tex]

Where h is Planck's constant and ν is the frequency.

We also have that:
[tex]\displaystyle \lambda \nu = c[/tex]

Where c is the speed of light and λ is the wavelength. Hence:

[tex]\displaystyle \nu = \frac{c}{\lambda}[/tex]

Therefore:
[tex]\displaystyle E= h\left(\frac{c}{\lambda}\right)[/tex]

Solving for λ yields:
[tex]\displaystyle \lambda = \frac{hc}{E}[/tex]

Hence substitute. Recall that h = 6.626 × 10⁻³⁴ Js and c = 2.998 × 10⁸ m/s:

[tex]\displaystyle \begin{aligned} \lambda & = \frac{(6.626\times 10^{-34}\text{ Js})(2.998\times 10^8\text{ m/s})}{4.56\times 10^{-19} \text{ J}} \left(\frac{1\times 10^9\text{ nm}}{1\text{ m}}\right) \\ \\ & = 436\text{ nm}\end{aligned}[/tex]

In conclusion, our answer is B.

Answer:

Hello! your answer is A,C, and D!

Explanation:

These are things only females would do/have, I hope I helped and good luck!

Have a wonderful day/night!

Ca(OH)₂⇒ Ca²⁺ + 2OH⁻

s                 s         2s

Ksp = [Ca²⁺][OH⁻]²

Ca(NO₃)₂ ⇒ Ca²⁺ + 2NO₃⁻

0.1 M             0.1        0.2

Input in Ksp

1.3 x 10⁻⁶ = 0.1 . 4s²

s² = 3.25 x 10⁻⁶

s = 1.8 x 10⁻³

1.8 x 10⁻³ is the molar solubility. Solubility is the amount of a substance that can be dissolved in a liquid to form a solution.

Solubility is the amount of a substance that can be dissolved in a liquid to form a solution; it is typically represented as grammes of solute every litre of liquid. One fluid's (liquid or gas) solubility in another can be entire (e.g., methanol and water are completely miscible) or partial (e.g., oil and water barely mix). Generally speaking, "like dissolves like" (for instance, the aromatic hydrocarbons dissolves in one another but not in water).

A material's solubility in two solvents is measured by the distribution coefficient, which is used in some separation techniques (such as absorption and extraction). In general, as temperature rises, so do the dissolution rates of solids in liquids, while they fall as temperature rises and rise with pressure for gases.

Ca(OH)₂⇒ Ca²⁺ + 2OH⁻

s                 s         2s

Ksp = [Ca²⁺][OH⁻]²

Ca(NO₃)₂ ⇒ Ca²⁺ + 2NO₃⁻

0.1 M             0.1        0.2

1.3 x 10⁻⁶ = 0.1 . 4s²

s² = 3.25 x 10⁻⁶

s = 1.8 x 10⁻³

Therefore, 1.8 x 10⁻³ is the molar solubility.

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Taking into account the definition of dilution, 83.3 mL of 0.0833 Lof 12 molar hydrochloric acid would be needed to create 1 L of a 1 molar solution of hydrochloric acid.

When it is desired to prepare a less concentrated solution from a more concentrated one, it is called dilution.

Dilution is the process of reducing the concentration of solute in solution, which is accomplished by simply adding more solvent to the solution at the same amount of solute.

In a dilution the amount of solute does not change, but as more solvent is added, the concentration of the solute decreases, as the volume (and weight) of the solution increases.

A dilution is mathematically expressed as:

Ci×Vi = Cf×Vf

where

In this case, you know:

Replacing in the definition of dilution:

12 M× Vi= 1 M× 1 L

Solving:

(1 M× 1 L)÷ 12 M= Vi

0.0833 L= 83.3 mL= Vi (being 1 L= 1000 mL)

In summary, 83.3 mL of 0.0833 Lof 12 molar hydrochloric acid would be needed to create 1 L of a 1 molar solution of hydrochloric acid.

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Method 1: gravimetry

advantages: Impurities in the sample can be identified

disadvantages: The process is long, because it goes through several stages

Method 2: titration

advantages: the process is fast, because the titrate and titrant react immediately

disadvantages: Sometimes the determination of the end point of the titration is carried out too fast or too slowly so that the calculations carried out are inaccurate

Answer: D

Explanation:

This is just a definition.

The blank space in the task statement should be filled with 25 as methane can retain 25 times more heat than carbon dioxide.

Methane, carbon dioxide amongst other gases are important greenhouse gases which allows the Earth retain it's heat in order for it to be habitable.

Methane can retain and release about 25 times more heat than Carbon Dioxide although Methane emissions are lower compared to Carbon Dioxide.

Read more on Greenhouse Gases:

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Answer:

The actual electronic structure of the molecule (the average of the resonance forms) is called a resonance hybrid of the individual resonance forms.

Explanation:

hope this help

pls mark brainliest

Answer:

They would be different.

Explanation:

As the finches evolved and moved away from their primary island, they would differentiate and change their species slightly. Maybe color of=r beak shape.

Answer: it has full valence shells

Explanation: Hope this is it

Answer:

Neon, along with helium, argon, krypton and xenon, make up the group known as noble gases. These are the most stable and least reactive elements due to having full valence shells (the outer shell has the max number of electrons, two for helium, eight for the rest).

Explanation:

Hope it helps

PlS MARK BRAINLIEST <3

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Tori

The base used in deodorants is magnesium hydroxide. This is further explained below. Option B is correct.

Generally, A base is a chemical that reacts with hydrogen ions to neutralize an acid, a base ranges from 7-14 in the pH range

In conclusion, In deodorants, magnesium hydroxide is utilized as a base. The function of the base is to neutralize the acid released in our mouth by bacteria, which causes tooth decay and other associated problems.

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Answer:

C. magnesium hydroxide

Explanation:

Edge

Benzilic acid will only precipitate in acidic solution to remove excess acid and restore equilibrium.

Chemical equilibrium refers to a state in which the rate at which reactant molecules combine to form products is equal to the rate at which products dissociate to form reactants.

For a reaction in equilibrium, any change to distort the equilibrium will cause equilibrium to shift to counter that change.

The components of Benzilic acid exist in equilibrium and will only precipitate in acidic solution because more acid has been added and equilibrium will shift to removal of excess acids.

Therefore, benzilic acid only precipitate in acidic solution in order to remove excess acid and restore equilibrium.

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The activating groups are; -NH2, -NR2 > -OH, -OR> -NHCOR> -CH3. while the deactivating groups are;  -NO2, -CF3> -COR, -CO2R, -SO3H > Halogens.

Owing to the  unusual stability of the benzene ring, it does not undergo  addition like other unsaturated species, rather benzene does undergo electrophillic substitution.

The substituent groups determine whether the molecule will be activated or deactivated towards electrophilic substitution, the following groups decativate benzene towards electrophilic substitution; -NO2, -CF3> -COR, -CO2R, -SO3H > Halogens. The following groups activate benzene ring towrads electrophilic substitution; -NH2, -NR2 > -OH, -OR> -NHCOR> -CH3.

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Answer: Oxide

Explanation:

Answer:

10,148 kJ

Explanation:

Did it on Engenuity 2022 and got it right - just double 5074

Answer:

10,148

Explanation:

Answer:In water's diagram, the slope of the line between the solid and liquid states is negative rather than positive. The reason is that water is an unusual substance in that its solid state is less dense than the liquid state.

Explanation:

Answer:

Dynamic equilibrium only occurs in reversible reactions, and it’s when the rate of the forward reaction is equal to the rate of the reverse reaction.

Explanation:

Does this answer your question?

D. A sour liquid that forms gas bubblee when mixed with copper

#1

#2

#3

#4

Electromagnetic waves such as radio waves are used in information transmission either as digital or analogy signals.

Electromagnetic waves are waves which are produced from the interactionof the electric and magnetic fields.

Transmitting data at lower frequencies enables the waves to travel longer distances than at higher frequencies, therefore scientists usually transmit data at a lower frequencies.

The limitations of transmitting information using electromagnetic waves include a limited number of broadcast frequencies and interference of waves.

Analog signals differ from digital signals in that analog signals have continuous electrical signals while digital signals have non-continuous electrical signals.

Digital signals over analog signals is that it transmits more information per second than analog signals Analog and digital signals are employed in mobile devices, television, radio, computers and the internet

A radio telescope is used to receive radio waves from astronomical radio sources in space.

It has several parts such as a dish and antenna,a receiver,a detector and an analyzer. The dish collects and focuses radio signals on the antenna and the information is processed by the receiver, detector and analyzer.

Radios waves are used for the transmission of radio and television signals.

Radio telescopes convert radio waves which are analog signals to electrical signals wgich are digital siagnals because it can be easily stored and transmitted in digital form.

Therefore, electromagnetic waves such as radio waves are used in information transmission.

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Answer:

5.1 | B | 3.2 kg

Explanation:

V1.M1=V2.M2

V1 x 0.59 = 0.91 x 2.45

V1=3.78 L

Answer:

Explanation:

0.20/4 = 0.05 for arsenic trichloide.

0.25/6 = 0.04 for water.

This means that water is the limiting reactant.

b) Microwaves, Visible light, X rays, Gamma rays

Answer:

[tex]\huge\underline{\red{A}\blue{n}\pink{s}\purple{w}\orange{e}\green{r} -}[/tex]

before looking at what the question says ,

let's have some general information related to the topic of the question !

__________________________

[tex]\implies \: [/tex] Electric field refers to the force generated by a nearby charge in the surroundings.

__________________________

[tex]\implies \: [/tex] Mathematically ,

Electric field = [tex]\frac{Kq}{r^{2}} \\[/tex]

where ,

K = coulomb's constant

q = magnitude of charge

r = distance between the opposite terminals

___________________________

[tex]\implies \: [/tex] Dipole moment , P = 2qd

where ,

q = magnitude of charges

d = distance between the charges

___________________________

[tex]\implies \: [/tex] positive charge tends to throw the field away from it while negative charge tends to pull the field towards it !

_____________________________________

seems like enough of information , so now let's look at the derivation !

refer the attachments in order to see the derivation !

Final answer -

[tex]\bold\pink{E = \frac{2kp}{(x {}^{2} - d {}^{2} ) {}^{2} } } \\ [/tex]

while , for a short dipole

[tex]\bold\pink{E = \frac{2pk}{x {}^{3} }} \\ [/tex]

hope helpful :D