Which statement describes electrical energy being transformed into light energy?

An electron will emit energy in quanta when its energy state changes from 4p to 3s.

When a quantum mechanical system or particle is bound, or spatially constrained, it can only take on specific discrete energy values, or energy levels. As opposed to classical particles, which can have any energy level, this. The phrase can also refer to the energy levels of nuclei or the vibrational or rotational energy levels in molecules. The term is most frequently used to describe the energy levels of the electrons in atoms, ions, or molecules that are confined by the electric field of the nucleus. A system with such distinct energy levels is said to have a quantized energy spectrum.

An electron shell, also known as a primary energy level, is the orbit of one or more electrons around the nucleus of an atom in chemistry and atomic physics. The "1 shell" (also known as the "K shell") is the shell that is closest to the nucleus. The "2 shell" (also known as the "L shell"), "3 shell" (also known as the "M shell"), and so forth are the shells that are further and more away from the nucleus. The shells are either labelled alphabetically with X-ray notation letters or with the primary quantum numbers (n = 1, 2, 3, 4...) (K, L, M, N...).

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The vapor pressure of water at 85.5°C is approximately 26.2 torr.

The Clausius-Clapeyron equation relates the vapor pressure of a substance to its enthalpy of vaporization and temperature:

ln(P2/P1) = -(ΔHvap/R) * (1/T2 - 1/T1)

where P1 and T1 are the initial pressure and temperature, P2 and T2 are the final pressure and temperature, ΔHvap is the enthalpy of vaporization, and R is the gas constant.

In this case, we are trying to find P2, the vapor pressure of water at 85.5°C, given that P1 is 40.1 torr at 34.1°C. We can set up the equation as follows:

ln(P2/40.1 torr) = -(40.7 kJ/mol / (8.314 J/mol·K)) * (1/(85.5 + 273.15 K) - 1/(34.1 + 273.15 K))

Note that we use a positive value for ΔHvap, since we are dealing with the vaporization of water, which is an endothermic process.

Simplifying the equation:

ln(P2/40.1 torr) = -0.006995

Taking the exponential of both sides:

P2/40.1 torr = e^(-0.006995)

P2 = 40.1 torr * e^(-0.006995)

P2 = 26.2 torr (rounded to three significant figures)

Therefore, the vapor pressure of water at 85.5°C is approximately 26.2 torr.

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To make 1 liter of a 10% NaCl solution from a solid stock, you will require the following materials and containers.MaterialsSolid NaClDistilled water1-Liter volumetric flask250-mL volumetric flask 2-beakersProcedureTo prepare 1 liter of a 10% NaCl solution, the following procedure should be followed:Measure out 100g of NaCl using a balance.

Measure the weight of an empty 250-mL volumetric flask.Add the NaCl to a 250-mL beaker and add a small amount of distilled water to it to dissolve the NaCl.Carefully pour the dissolved NaCl solution into the 250-mL volumetric flask. Add distilled water to the mark on the flask to make up the volume. Stopper the flask and invert it several times to mix the solution.Measure the weight of the 1-Liter volumetric flask.Add the 250-mL volumetric flask solution to a 1-Liter volumetric flask.Add distilled water to the mark on the flask to make up the volume.

Stopper the flask and invert it several times to mix the solution.The final volume of the solution will be 1 liter of a 10% NaCl solution.PrecautionsEnsure the NaCl has completely dissolved before adding more water to avoid making a less concentrated solution.Measure the weight of the volumetric flask before and after adding the solution to calculate the volume of solution that was added.Use distilled water to prepare the solution.

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Answer:

In the followings below, the one that doesn't attract to magnets is:

Option 4, Aluminum.

Explanation:

Mainly because of the aluminum's crystal structure.

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Answer:

Aluminum

Explanation:

Ferromagnetic Metals

Ferromagnetic metals and alloys are the only magnetic metals. Out of all of the elements on the periodic table, there are only 3 metals that are attracted to magnets: iron, nickel, cobalt.

Aluminum

Aluminum is a nonferrous metal (meaning not including iron or steel) that does not include any ferromagnetic metals. Additionally, aluminum itself is not magnetic, so there is no attraction between aluminum and a magnet.

Answer:

virtual

Explanation:

because we cannot touch or sense it

Answer:

D. ocean ridges​

Explanation:

Answer:

I think A

Explanation:

Most volcanoes form at the boundaries of Earth's tectonic plates. ... The two types of plate boundaries that are most likely to produce volcanic activity are divergent plate boundaries and convergent plate boundaries

To calculate the number of moles of aluminum, sulfur, and oxygen atoms in 5.00 moles of aluminum sulfate, Al2(SO4)3 we can use the molar mass of Al2(SO4)3. Molar mass of Al2(SO4)3 is, Al = 2(27 g/mol) = 54 g/mol S = 3(32 g/mol) = 96 g/mol O = 12(16 g/mol) = 192 g/mol

Therefore, the molar mass of Al2(SO4)3 = (54 g/mol) * 2 + (96 g/mol) * 3 + (192 g/mol) = 342 g/mol Now, we can calculate the moles of each atom using the formula: Number of moles = Mass / Molar mass Aluminum (Al) is present in Al2(SO4)3, so we can calculate the number of moles of Aluminum. Number of moles of Al in 5 moles of Al2(SO4)3 = (5.00 moles Al2(SO4)3) * (2 moles Al / 1 mole Al2(SO4)3) = 10.0 moles Al Sulfur (S) is also present in Al2(SO4)3, so we can calculate the number of moles of sulfur.

Number of moles of S in 5 moles of Al2(SO4)3 = (5.00 moles Al2(SO4)3) * (3 moles S / 1 mole Al2(SO4)3) = 15.0 moles S Oxygen (O) is also present in Al2(SO4)3, so we can calculate the number of moles of oxygen. Number of moles of O in 5 moles of Al2(SO4)3 = (5.00 moles Al2(SO4)3) * (12 moles O / 1 mole Al2(SO4)3) = 60.0 moles O Therefore, the number of moles of aluminum, sulfur, and oxygen atoms in 5.00 moles of aluminum sulfate, Al2(SO4)3 are: Aluminum (Al) = 10.0 moles Sulfur (S) = 15.0 moles Oxygen (O) = 60.0 moles

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Answer:

Tara is making a scrapbook using 24 photos and 8 newspaper clippings. She wants to put the same number of photos and clippings on each page. What is the greatest number of scrapbook pages Tara can make?

Explanation:

Tara is making a scrapbook using 24 photos and 8 newspaper clippings. She wants to put the same number of photos and clippings on each page. What is the greatest number of scrapbook pages Tara can make?

Answer:

The properties of metals as well as non metals is called metalloids.

When acetanilide is combined with an inorganic compound like sand, the melting point of the sample remains constant. Because acetanilide has a melting point of 114.3° Celsius, the melting point after mixing the inorganic compound will be the same as before crystallization.

What is Acetanilide?

Acetanilide is a colorless, odorless solid chemical that resembles a leaf or flake. N-phenylacetamide, acetanil, and acetanilid are other names for it.

Acetanilide is used to stabilize cellulose ester varnishes and as a hydrogen peroxide decomposition inhibitor. It has also been used as an intermediator in the synthesis of rubber accelerators, dyes and dye intermediates, and camphor. Acetanilide is used to make 4-acetamidobenzenesulfonyl chloride, a key intermediate in the production of sulfa drugs.

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Answer: The limiting reactant is Na

Explanation:

Answer:

ok

Explanation:

Answer:

Hi

Explanation:

Good morning, thx for the free points, have a great day/night, and stay safe!

Answer:

Fertilisers

And also organic compounds

Answer:

C.) is correct. your answer might be different depending on the wording of the question

Explanation:

:p

The bonds that are formed in this reaction are;

The term bond refers to a chemical linkage between two atoms. We have in this case, the reaction; CH4 + 2O2 ----->CO2 + 2H2O.

In this case, we have the following bonds being formed in the process of the reaction;

Hence, chemical reaction involves the forming and breaking of bonds.

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Answer:

solar electric energy

Explanation:

k12

True. When one electron within any atom gets excited but lacks the energy to leave the nucleus, its energy must fall into one of set of quantized values.

The fundamental unit of chemistry is the atom. It is the lowest portion of matter where electrical charges particles cannot escape. It is also smallest material with properties resembling chemical elements.

An atom is a part of an element. In a given element, there is only one kind of atom per atom. The remaining components of an atom are subatomic particles called protons, neutrons, and electrons. The fusion of elements can produce molecules.

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srry the pic is not clear......

l cant see it.....

Airborne particulate matter is classified according to size: fine (PM2.5) and coarse (PM10) (PM10). PM10 is made up of particles that are 10 micrometers in diameter or smaller.PM10 particles are larger than PM2.5 particles based on their aerodynamic diameter.

The World Health Organization states that PM10 particles are generally larger than PM2.5 particles based on their aerodynamic diameter.

PM2.5 is made up of particles that are 2.5 micrometers in diameter or smaller and they are considered  more harmful to human health because they can reach the lungs and bloodstream, causing various health problems. The PM10 particles, however, are too large to be breathed deeply into the lungs, so they primarily cause respiratory tract problems and irritation of the eyes, nose, and throat. PM10 is known to cause chronic bronchitis and heart disease, and it can exacerbate pre-existing heart and lung disease.

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The complete question should be

What are PM2.5 and PM10 particles in chemistry?

The  birth of lead from its ores involves several  way, including crushing and grinding the ore to a fine greasepaint, followed by a flotation process to separate lead- containing minerals from other  contaminations.  

The first step in  rooting  lead from its ore is to crush and grind the ore into a fine greasepaint. This increases the  face area of the ore, easing the  posterior chemical  responses.

The powdered ore is  also  subordinated to a flotation process, where specific chemicals are added to  produce a frothy admixture. The  head contains lead- containing minerals, which can be separated from the rest of the ore.  

The  head flotation process relies on the differences in  face  parcels of the minerals.

By widely attaching to the  face of the lead- containing minerals, the  head carries them to the  face, while the  contaminations sink to the bottom.

The  head is  also collected and further reused to  gain  supereminent concentrate.  

The  supereminent concentrate undergoes  fresh refining processes  similar as smelting and refining to  gain pure lead essence.

Smelting involves heating the concentrate with a reducing agent,  similar as coke or carbon, to separate the lead from other  factors. The molten lead is  also  meliorated by removing any remaining  contaminations.

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The extraction of lead from its ore includes several steps. The pyrometallurgical process, which involves heating the ore in a blast furnace, is the most commonly used method.

Here's an overview of the extraction process:

        2PbS + 3O2 → 2PbO + 2SO2

        The formed lead oxide (PbO) is then reduced further.

        a) Lead oxide reduction:

        PbO + C → Pb + CO

        b) Impurity removal: CaCO3 → CaO + CO2

        CaO + SiO2 → CaSiO3

Overall, the extraction of lead from its ore involves crushing, roasting, smelting, and refining steps to obtain pure lead metal.

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The question is -

Extraction of lead from its ore. Explain the process.

Your answer is 4 protons 4 electrons and 5 neutrons

Natural resources are those that are accessible without human intervention. Like the sun, the atmosphere, the air, the water, the land, the mines, the vegetation, and animal life.

Renewable resources :

Non Renewable resources :

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Answer: because you are trying to form a chemical reaction I think

The main reservoirs of the carbon cycle are the atmosphere, oceans, land (including vegetation and soils), and fossil fuels. In these reservoirs, carbon exists in both inorganic and organic forms.

The inorganic carbon cycle involves the exchange of carbon dioxide (CO2) between the atmosphere and oceans through processes like photosynthesis and respiration.

Organic carbon, on the other hand, is found in living organisms, dead organic matter, and soil organic matter. It is cycled through processes such as decomposition and consumption by organisms. The interactions between the inorganic and organic carbon cycles occur primarily in the biosphere, where photosynthesis converts inorganic carbon into organic carbon compounds. While inorganic carbon is primarily in the form of CO2, organic carbon is present in complex organic molecules. Both forms of carbon play crucial roles in energy transfer, nutrient cycling, and climate regulation.

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Measles is a communicable disease that requires immunization to prevent illness when exposed to it.

Measles is a communicable disease and highly contagious. It  is usually very serious in children. The disease can be contacted through droplets in the air, physical contact and through mother-to-child transmission.

It is a very serious disease as it is caused by a virus which replicates very fast in the throat and nose thereby creating symptoms such as runny nose, coughing, sneezing and is usually accompanied with a rash.

The severity and death rates is what gave rise to the creating of a measles vaccine which is usually given to babies after birth to make them immune to the potential exposure to the virus.

Diabetes, bronchitis and strep throat have no vaccine as they can always be treated or managed with over-the-counter drugs.

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Answer:

jayfeather friend me    ccccccc

Explanation:

is: cellular respiration creates an energy molecule when glucose is broken down.

Conservation of mass (mass is never lost or gained in chemical reactions), during chemical reaction no particles are created or destroyed, the atoms are simply rearranged from the reactants to the products.

Single displacement in acid properties is a kind of oxidation-reduction chemical reaction.

A chemical reaction is a process that leads to the transformation of one set of chemicals into another chemical. It is also known as a single replacement reaction.

It is a reaction in which one element is substituted with another element. When a replacement reaction occurs, a pure element and an aqueous compound are formed. It is denoted as:

      A + BC ⇒ AC + B   were, A and B are pure elements.

Acids react with metals to form salt and hydrogen gas. The metals that are more active than acids can undergo a single displacement reaction. Due to this, the acid will be replaced by the metal, but it does not apply to less reactive metals.

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We can't feel the force of attraction between us and mars due to the large distance and negligeable gravitation.

Gravitation is the universal force of attraction acting between all matter.

According to the universal law of gravitation, the effect of the force of gravity decreases as the distance increases.

The gravitation force is inversely proportional to the radius or the distance.

So, the gravitational force exhibited by the mars is not experienced by us due to the large distance.

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Answer: D.

Mars is a long distance away.

Explanation: plato :3

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Net ionic equation for the reaction when nickel(ii) sulfide and excess hydrochloric acid (aq) are combined will be Ni2S4 + 2HCl →NiCl2 + H2S.

In general ,Net ionic equation is defined as a chemical equation that represents only those elements, compounds, and ions that directly participate in the chemical reaction.

When their is a reaction between nickel sulfide and excess hydrochloric acid in aqueous state . Being less reactive Nickle cannot liberate the hydrogen gas . Nickle will react with a non-oxidizing acid (HCl) for releasing hydrogen gas which results in the formation of a nickel salt because it is present above hydrogen in the reactivity series.

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A substance has 0. 0152088 moles per 10 grammes. One can use the equation grams = weight / molar mass to determine this. The volume of one mole of a chemical is represented by its molar mass on the chemical elements.

You would take its weight (10g) and multiply it by the material's molar mass to determine the number of molecules within 10g of a substance. For instance, if the material is water, its molar mass is 18. 015 g/mol, meaning that 10 g is comparable to 0. 555 molecules of water.

However, the formula moles = mass / molar weight can be used to determine the number of moles in an unit weight regardless of the substance. Therefore, there are 0. 0152088 mole in 10

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