what is the energy of the photon absorbed by the transition of an electron in a hydrogen atom from energy level n

There is a fizzing reaction that occurs when certain popular antacids are dissolved in water. A chemical reaction occurs as a result of this fizzing. Hence, when the antacid and water are mixed, a chemical change occurs.

When the antacid and water are mixed, a chemical change occurs.What is a chemical change?A chemical change refers to a change that happens when a new substance is formed. There are a variety of indications that chemical change has taken place. One of the most telling signs is the formation of a new substance. It happens when two or more substances combine chemically, resulting in the formation of a new substance with different properties from those of the original materials.There is a fizzing reaction that occurs when certain popular antacids are dissolved in water. A chemical reaction occurs as a result of this fizzing. Hence, when the antacid and water are mixed, a chemical change occurs.

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The mathematical formula for the gas pressure (in atm) at 50.0 °C is P2= 2.17 atm.

Under normal temperatures and pressures, substances that are totally in a gaseous state are referred to be gases. Certain solids or liquids have an accompanying gaseous phase known as a vapour. Smoke is a thin solid that results from insufficient burning.

The price hike is attributed by AAA to an increase in fuel demand. "Pump prices have risen as a result of increased gas demand and limited supplies. Drivers will probably continue to experience pump price increases if demand grows "in line with AAA.

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Answer:

See explanation

Explanation:

Sublimation refers to the movement of molecules directly from solid into the vapor or gas phase while deposition refers to the movement of  molecules directly from the gas phase into the solid phase. The two are opposite to each other.

Frost is formed in a situation where a substance cools to a temperature that is lower than its dew point. In this situation, the vapour is directly deposited on a surface to form a frost without passing through a liquid phase. Hence the name, deposition.

Answer:

Remains the same

Explanation:

I just got it right on Acellus!

The binding of the amino acid in aminoacyl-tRNA involves the formation of an ester bond.  Option b

Aminoacyl-tRNA is a complex molecule that plays a crucial role in protein synthesis. It consists of a tRNA molecule covalently linked to an amino acid. The amino acid is attached to the 3' end of the tRNA molecule through an ester bond.

An ester bond is formed between the carboxyl group (-COOH) of the amino acid and the hydroxyl group (-OH) of the ribose sugar at the 3' end of the tRNA molecule. This ester bond is also referred to as an ester linkage. The formation of the ester bond is catalyzed by the enzyme aminoacyl-tRNA synthetase.

The ester bond in aminoacyl-tRNA is essential for protein synthesis. During translation, the aminoacyl-tRNA molecule carries the specific amino acid to the ribosome, where it is incorporated into the growing polypeptide chain. The ester bond is later hydrolyzed, releasing the amino acid for further use in protein synthesis.

In summary, the binding of the amino acid in aminoacyl-tRNA involves the formation of an ester bond between the carboxyl group of the amino acid and the hydroxyl group of the ribose sugar in the tRNA molecule.

Option b

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Allotropes of carbon include diamond and graphite. Chemically, these minerals are composed of different-sized 'C' atoms with different physical properties. Under extreme conditions of 55000 atmospheres of pressure and 1400 degrees Celsius, graphite turns into a diamond.

As they are sp² hybridized and pointed in the same direction, the carbon atoms in the graphite structure form hexagonal rings. Particles are arranged in layers within the rings. According to reports, graphite has a low density and low electrical conductivity.

The melting point of the diamond is around 3843 K, and its density is approximately 3.51 g/cm³. Due to the involvement of its valence electrons in C-C sigma covalent bonds, it is well known to be a poor conductor of electricity.

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The energy change ΔE when ¹⁶O₈ ( 15.99491461956 amu) is formed from 8 protons and 8 neutrons is less than zero is true.

Explanation: During the fusion reaction that combines 8 protons and 8 neutrons to create 16O8, the energy change, ΔE, is negative. When the mass of the products is less than that of the reactants, the reaction is exothermic and releases energy. The mass of the reactants, eight protons and eight neutrons, is 15.99 amu.

The mass of the products, oxygen-16, is 15.99 amu, which is less than that of the reactants. This means that energy is released, resulting in a negative energy change. The reaction is exothermic as a result of this. The energy change ΔEwhen 16O8 is formed from 8 protons and 8 neutrons is less than zero, and this is a true statement.

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Answer:

A. 4 cm, 40 mm

B. 5.5 cm, 50 mm

C. 8.8cm, 80 mm

D. 8.2 cm, 82 mm

E. 9.5cm, 95 mm

Explanation:

NB: 1 cm = 10 mm

To find the enthalpy of fusion (ΔHf) of sodium acetate, we can use the equation q = mHf, where q is the heat transferred, m is the mass of the substance, and Hf is the enthalpy of fusion.

Given:

Mass of water (m1) = 500 g

The initial temperature of water (T1) = 25°C

The final temperature of water (T2) = 39.4°C

Specific heat of water (C) = 4.18 J/g-°C

To determine the heat transferred from the water, we can use the formula:

q1 = m1 * C * ΔT1

Where ΔT1 is the change in temperature of the water.

ΔT1 = T2 - T1

ΔT1 = 39.4°C - 25°C

ΔT1 = 14.4°C

q1 = 500 g * 4.18 J/g-°C * 14.4°C

q1 = 30240 J

The heat transferred from the water to the sodium acetate is equal to the heat absorbed by the sodium acetate. Therefore, we have:

q1 = q2

q2 = q1 = 30240 J

Given:

Mass of sodium acetate (m2) = 200 g

Using the equation q = mHf, we can rearrange it to solve for Hf:

Hf = q2 / m2

Hf = 30240 J / 200 g

Hf = 151.2 J/g

Therefore, the enthalpy of fusion (ΔHf) of sodium acetate is 151.2 J/g.

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Yes, a supersaturated solution will return back to being a saturated solution once a solute crystal has been added.

A supersaturated solution is a solution that contains more dissolved solute than would be possible under normal circumstances at a given temperature and pressure. In a supersaturated solution, the solute molecules are able to remain dissolved in the solvent even though they would normally begin to precipitate out of the solution. This can happen when a solution is prepared by dissolving a solute in a solvent at an elevated temperature and then cooling the solution rapidly, preventing the solute from crystallizing out of the solution. Supersaturated solutions are often unstable and will eventually return to a saturated state if given the opportunity to do so, such as by the addition of a seed crystal or agitation of the solution.

When a solute crystal is added to a supersaturated solution, it provides a nucleation site for the solute to crystallize. As the solute molecules attach to the crystal, they are removed from the solution, causing the concentration to decrease. Eventually, the concentration will decrease to the point where it becomes saturated, and no more solute will dissolve.

Thus, adding a solute crystal to a supersaturated solution causes the excess solute to come out of the solution and return it to a saturated state.

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Answer:

Replication

Explanation:

In science, the work of a scientist is regarded as authentic if other experts in other places can follow the same steps as he/she claimed to follow and arrive at the same result.

For example, a scientist in California, United States of America may carry out a research and publish his findings. Another scientist in Christchurch New Zealand following exactly the same procedure is expected to arrive at the same results as the original researcher if there were no errors in the work.

However, where there are disparities in results, the scientist in Newzealand may discover errors that were unknown to the original researcher in the united States. The New Zealand scientist was carrying out a process known as 'replication'. That is, repeating a scientific research in order to obtain the same results thereby validating the research.

Iron filings burning when sprinkled over a gas flame to produce iron(III) oxide is an example of a combustion reaction.

.In this case, the iron filings (Fe) react with oxygen from the gas flame to form iron(III) oxide (Fe₂O₃). The reaction can be represented by the following equation:

4Fe + 3O₂ → 2Fe₂O₃

During the combustion process, the iron filings undergo a chemical change as they combine with oxygen to form a new compound, iron(III) oxide. This reaction is exothermic, meaning it releases energy in the form of heat and light. The heat produced causes the iron filings to burn, resulting in the formation of iron(III) oxide.

Iron(III) oxide is a reddish-brown compound commonly known as rust. It has a different chemical composition and physical properties compared to the original iron filings. The reaction between iron and oxygen is highly exothermic, making it a suitable demonstration for the combustion process.

In summary, the burning of iron filings when sprinkled over a gas flame to produce iron(III) oxide is a combustion reaction where iron reacts with oxygen to form a new compound, releasing heat and light in the process.

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The electronic configuration of x, y, and z.

\(x=1s^2\)

\(Y= 1s^22s^22p^63s^2\)

\(Z= 1s^22s^22p^63s^23p^5\)

Electronic configuration, also called electronic structure, is the arrangement of electrons in energy levels around an atomic nucleus.

a.

\(x=1s^2\)

\(Y= 1s^22s^22p^63s^2\)

\(Z= 1s^22s^22p^63s^23p^5\)

b.

x= Period 1 and group18

Y=Element is in period 3 and Group 2

Z=Element is in period 3 and group 17.

c.

X, Y & Z represents Helium, magnesium, and chlorine.

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No, diatomic elements cannot exist as single atoms.

Diatomic elements are those that naturally occur as a molecule of two atoms of the same element, such as oxygen (O2), nitrogen (N2), and hydrogen (H2). These elements are chemically stable in their diatomic form and have strong covalent bonds that keep the atoms together.

It is thermodynamically unfavorable for diatomic elements to exist as single atoms, as the energy required to break the covalent bond is very high. Therefore, diatomic elements will always exist as a molecule of two atoms. This can be observed in their physical and chemical properties, which are unique to the diatomic form of the element.

Overall, diatomic elements are a unique class of elements that exist naturally as molecules of two atoms. It is not possible for them to exist as a single atom due to their strong covalent bond.

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Answer:

The temperature of the solution will decrease.

Explanation:

Less energy is released than is used, the molecules of the solution move more slowly, making the temperature decrease.

According to the concept of solubility, lowering of the freezing point  results when a solute dissolves in a solvent.

Solubility is defined as the ability of a substance which is basically solute to form a solution with another substance usually a solvent. There is an extent to which a substance is soluble in a particular solvent. This is generally measured as the concentration of a solute  which is present in a saturated solution.

The solubility mainly depends on the composition of solute and solvent ,its pH and presence of other dissolved substance. It is also dependent on parameters of  temperature and pressure which is maintained.Concept of solubility is not valid for chemical reactions which are irreversible. The dependency of solubility on various factors is due to interactions between the particles, molecule or ions.

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Answer: neutralization reactions

If we mix equal amounts of an acid and a base then the two chemicals essentially cancel out each other and produce salt and water. Mixing equal amounts of a strong acid with strong base results in a neutral solution whose pH value remains 7 and this type of reactions are known as neutralization reactions

Explanation:

Hope this helped you! :D

Brainliest if possible.

And I also answered first! :D

The concentration of CO (g) in the equilibrium mixture is 0.020 M. In other words, only a small amount of CO (g) is produced in this reaction at 1000°C. T 0.020 M.

The concentration of CO in an equilibrium mixture (in mol/L) is 5.8 M.

Given that the concentration of H2O (g) is [H2O] = 0.500 M at 1000°C, and  the reaction is:

C(s) + H2O(g) ⇄ CO(g) + H2(g) KC = 0.2 at 1000°C

We need to determine the concentration of CO in an equilibrium mixture (in mol/L)

if a reaction mixture initially contains only reactants.

We can solve this problem using the ICE table method as follows:

Let x be the change in concentration of H2O (g) and CO (g) when they reach equilibrium.

Then the equilibrium concentrations of CO (g) and H2 (g) are equal to x. Hence, the equilibrium concentration of H2O (g) is (0.500 - x) M. Substitute these values in the expression for Kc and solve for x.

Kc = [CO (g)] [H2 (g)] / [H2O (g)] [C (s)]

= 0.2[CO (g)] = Kc [H2O (g)] [C (s)] / [H2 (g)]

= 0.2 × (0.500 - x) / x

We can simplify this expression by cross-multiplication to get:

5x = 0.1 - 0.2xx = 0.02 M

Substituting x = 0.02 M in the expression for [CO (g)], we get:

[CO (g)] = 0.2 × (0.500 - 0.02) / 0.02 = 5.8 M (approx.)

Therefore, the concentration of CO (g) in an equilibrium mixture (in mol/L) is 5.8 M.                                                                                               The problem requires us to find the equilibrium concentration of CO (g) in a mixture that initially contains only reactants.

To solve this problem, we need to use the expression for the equilibrium constant Kc, which is given by:

Kc = [CO (g)] [H2 (g)] / [H2O (g)] [C (s)]

We can also use the ICE table method to solve this problem. In this method, we start with the initial concentration of the reactants and calculate the change in concentration of each species as they reach equilibrium.

We then use the equilibrium concentrations to calculate the value of Kc and solve for the unknowns. Here is how we can set up the ICE table for this problem: Reaction:

C(s) + H2O(g) ⇄ CO(g) + H2(g)

Initial: [C] = [H2]

= 0 M,

[H2O] = 0.500 M

Equilibrium: [C] = [H2] = x,

[H2O] = 0.500 - x,

[CO] = [H2] = x

Change: +x +x -x -x

Substituting the equilibrium concentrations into the expression for Kc, we get:

Kc = [CO] [H2] / [H2O] [C]

= x² / (0.500 - x)

= 0.2

Solving for x, we get: x = 0.020 M

Substituting this value of x into the expression for [CO], we get:

[CO] = x = 0.020 M

Therefore, the concentration of CO (g) in the equilibrium mixture is 0.020 M.

In other words, only a small amount of CO (g) is produced in this reaction at 1000°C. T 0.020 M.

The concentration of CO in an equilibrium mixture (in mol/L) is 5.8 M.

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1000 grams of nitroglycerin 2% ointment should be mixed with the ointment base to obtain 100 grams of an ointment with a concentration of 0.2%.

To determine the amount of nitroglycerin 2% ointment needed to mix with an ointment base to obtain 100 grams of an ointment with a concentration of 0.2%, we can use the concept of a proportion.

Let's set up the proportion:

(grams of nitroglycerin 2% ointment) / 2% = 100 grams / 0.2%

To solve for the grams of nitroglycerin 2% ointment, we can cross-multiply and then divide:

(grams of nitroglycerin 2% ointment) = (2% / 0.2%) * 100 grams

Calculating the right side of the equation:

(grams of nitroglycerin 2% ointment) = (2 / 0.2) * 100 grams

                                = 10 * 100 grams

                                = 1000 grams

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The reaction would start by attacking chlorine first as it is the most electronegative element present.

Electronegativity is determined by the number of electrons it can take. According to the periodic table the electronegativity increases down the group.

  In the given question, 3,4- dichloronitrobenzene is a cyclic compound, as benzene is itself a cyclic compound. The nucleophile would start attacking the chlorine group first as it is the most electronegative element of the group.

  Whenever a nucleophile attacks, it first starts attacking the most electronegative element as it would easily take up electrons and would form a bulk.

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Answer:

c

Explanation:

Thermal Energy has been the type of energy that refers to the kinetic energy of particles contained in a system. Hence, the correct option is (C).

Thermal energy is the energy contained within a system as a result of its temperature. Thermodynamics, a branch of chemistry, states how heat is transmitted through multiple systems and how work is done in the process by the virtue of the first law of thermodynamics.

The thermal energy speeds the movement and collision of the particles present within the system. It is found in electric heat, geothermal, coals, etc. It is due to the kinetic energy that allows the movement of the particles.

Therefore, option C. the kinetic energy contained in the particles results in thermal energy.

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Answer:Forces include gravity, friction, and applied force. Force causes changes in the speed or direction of motion.

Explanation:

Answer:

Its force, Just did it. 100%

Explanation:

No explaination needed. I got it right.

Part A:

The energy associated with the annihilation of a positron and an electron can be calculated using Einstein's mass-energy equivalence equation, E = mc^2. Since the mass of both the positron and electron is approximately 9.10938356 × 10^-31 kilograms, we can calculate the energy as follows:

E = (2 * 9.10938356 × 10^-31 kg) * (299792458 m/s)^2

Converting the energy from joules to kilojoules and using Avogadro's number (6.022 × 10^23 mol^-1) to express the energy per mole of reactants:

E = [(2 * 9.10938356 × 10^-31 kg) * (299792458 m/s)^2] / 1000 J/kJ * (6.022 × 10^23 mol^-1)

Calculating the numerical value, the energy associated with this process is approximately 1.022 MeV, which is equivalent to 1.022 * 10^6 electron volts (eV). Converting to kilojoules per mole, we get E = 96.485 kJ/mol of reactants.

Part B:

When the energy from the annihilation is carried away by two gamma ray photons, we can use the energy-momentum relationship for photons: E = hc/λ, where E is the energy of the photon, h is Planck's constant (6.62607015 × 10^-34 J·s), c is the speed of light (299792458 m/s), and λ is the wavelength of the photon.

Since we know the energy from Part A (1.022 MeV or 1.022 * 10^6 eV), we can rearrange the equation to solve for the wavelength:

λ = hc/E

Substituting the values:

λ = (6.62607015 × 10^-34 J·s * 299792458 m/s) / (1.022 * 10^6 eV * 1.602176634 × 10^-19 J/eV)

Calculating the numerical value, the wavelength of the photons is approximately 1.214 nanometers (nm) or 1214 picometers (pm).

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The quantity of carbon dioxide (CO₂) produced is directly proportional to the amount of fuel burned.

For example, burning one liter of gasoline produces 2.3 kilograms of CO₂. Therefore, the more fuel burned, the higher the amount of CO₂ emitted.

In order to reduce CO₂ emissions, it is important to reduce the amount of fuel burned. This can be done by driving less, using more efficient vehicles, switching to renewable energy sources, or even simply reducing the temperature of the thermostat. All of these activities will reduce the amount of fuel burned, thus resulting in a decrease in the amount of CO₂ produced.

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Answer:

CH3CH2CH2CH2CH2CH2OH-HEXAN-1-OL

Explanation:

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The correct option is (D): "An atom within a compound can sometimes attain a more stable electronic structure either by gaining or by losing electrons."

\(H_2O_2\), hydrogen peroxide, contains two oxygen atoms, each with a valence of -1. In certain chemical reactions, one or both of the oxygen atoms can undergo a change in their oxidation state. Oxidation state refers to the charge or number of electrons an atom has gained or lost. When \(H_2O_2\) acts as an oxidizing agent, it causes other substances to lose electrons, resulting in an increase in oxidation state. In this process, one or both of the oxygen atoms in \(H_2O_2\) gain electrons, reducing the oxygen atoms from an oxidation state of -1 to a lower state.

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Answer:

colorless liquid with a strong smell and a white solid with no smell. The substances’ repeating groups of atoms are shown above on the left. After they were mixed, the chemist analyzed the results and found two substances. One ending substance had the repeating group of atoms shown above on the right.

Explanation: