What happens on an atomic level when a reaction between two elements such as sodium and chlorine results in two oppositely charged ions?.

The reaction is: Na + H20 --> [tex]\frac{1}{2}[/tex]H2 + NaoH

ΔHr = (-1)(-285.84)+1(-425.9)

        =-140KJ/gmol

1ml water = 1g water = 0.056gmol . 100gNa = 4.35gmoles

If water reacts, about 4.35 - 0.056 = 4.29gmol

or about 98.7g of Na remain.

The heat capacity of Na is 28J/gmol°C

The energy blance is :

(-140) × 0.056 + (4.29) × 28 ××ΔT=0

ΔT = 65°C

The heat is released up on reaction is sufficient to warm the Na metal up by about 65°C or to about 85-90°C from room temperature.This may be enough to cause the hydrogen °gas to expolde.

Hence above given is a correct answer.

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The acceleration of the carl is -1.022 m/s².

We need to know about acceleration to solve this problem. The acceleration can be defined as the change in speed per interval of time. It can be written as

v'² = v² + 2 . a . s

where a is acceleration, v' is final velocity, v is initial velocity and s is the distance

From the question above, the given parameters are

v' = 58 km/h = 16.11 m/s

v = 94 km/h = 26.11 m/s

d = 0.9 m

revolution (n) = 73

Find the distance

s = n . π . d

s = 73 . 3.14 . 0.9

s = 206.48 m

Find the angular acceleration

v'² = v² + 2 . a . s

16.11² = 26.11² + 2 . a . 206.48

412.97a = -422.2

a =  -1.022 m/s²

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To calculate the heat released during the combustion of methanol, you will need to know the heat of combustion of methanol, which is the amount of heat released when a given amount of methanol is burned in oxygen.

The heat of combustion of methanol is -726 kJ/mol.

To find the heat released in kJ using 790 grams of water and a temperature change of 9.1 degrees Celsius,

you will need to use the formula q = m * c * deltaT, where q is the heat released, m is the mass of the substance being heated (in this case, water), c is the specific heat of the substance, and deltaT is the change in temperature.

In this case, the heat released would be:

q = 790 g * 4.18 J/(g*C) * 9.1 C = 28,903.22 J.

To convert this to kJ, you would divide by 1000 to get 28.90322 kJ. Rounded to the nearest integer, the heat released would be 29 kJ.

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Yes, albumin have quaternary structure.

The egg white contains large number of protein called albumin. the four level of protein structures are : primary ,  secondary , tertiary , quaternary structure. the proteins are made  up of single polypeptide chain . the some of proteins are made up of multiple polypeptide chain called as subunits. these subunit together for the protein structure called as the quaternary structure. the same type of the interaction which is tertiary are formed are present in between the subunits that form the quaternary structure.

Thus, the protein formed by the polypeptide chain called albumin have quaternary structure.

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Volume of a 0.189 m sodium hydroxide solution is required to neutralize 13.8 ml of a 0.171 m perchloric acid solution is 80.42 L.

The balance chemical equation is given :

NaOH  +   HClO₄   ----->   NaClO₄   +   H₂O

given that :

molarity = 0.171 M

volume = 13.8 mL = 0.0138 L

moles of HClO₄ = molarity × volumes in L

                          = 0.171 × 0.0138

                          =  0.0023 mol

moles of  HClO₄ = moles of NaOH

moles of NaOH = 0.0023 mol

volumes of NaOH = molarity / moles

                              = 0.189 / 0.00235

                              = 80.42 L

The volume of sodium hydroxide = 80.42 L.

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The diatomic molecule hydrogen bromide (HBr), when dissolved in water, produces hydrobromic acid, a potent acid. "Constant boiling" hydrobromic acid is an aqueous solution with a distillation temperature of 124.3 °C (255.7 °F) and a mass concentration of 47.6% HBr (8.77 mol/L) by mass.

The powerful acids include nitric, sulfuric, hydrobromic, hydroiodic, perchloric, and chloric acids. Hydrofluoric acid is the only weak acid that results from the reaction of hydrogen with a halogen.

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The correct answer is 0.292 M.

Molarity or molar concentration is the number of moles of solute per liter of solution or molarity can be defined to be as number of moles of solute in volume of solution.

Mass of Gold(III) hydroxide = 1.1868 g

Moles of gold(III) hydroxide = mass of Au(OH)₃ / Molar mass of Au(OH)₃

Moles of Gold(III) = 1.1868/247.98 = 0. 004 moles

Moles of hydroxide ion from  Au(OH)₃ will be,

Au(OH)₃ ⇔ Au³⁺ + OH⁻

Here,

if 1 mole of  Au(OH)₃ gives 3 moles of OH⁻ ion then,

0.006 moles of  Au(OH)₃ will give,

 = 3 x 0.006 moles of OH⁻ ions

 = 0.018 moles of OH⁻ ions

Again,

NaOH ⇔Na⁺ + OH⁻

Since, [OH⁻] = [NaOH] = 1.76 x 10⁻¹ = 0.176 M = molarity.

Hence, the moles of OH⁻ = Molarity of OH⁻ x VH of OH⁻

                                      = 0.176 M x 0.154L

                                      = 0.0271 moles

Now, total moles of OH⁻ will be

= OH⁻ from  Au(OH)₃ + OH⁻ from NaOH

= (0.018 + 0.0271) moles

= 0.0451 moles of OH⁻

To find the concentration of hydroxide ion, we need to just apply the formula of molarity:

[OH⁻] = moles of OH⁻ / Volume of the solution

         = 0.0451 / 0.154

         = 0.292 M

Therefore, the the total concentration of hydroxide ion, in molarity is 0.292 M.

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The replacement of RNA by DNA as the primary carrier of genetic information was based on DNA's double helix and chemical stability. RNA is more unstable and prone to degradation due to presence of ribose sugars rather than deoxyribose of DNA.

DNA (deoxyribonucleic acid) consists of two polynucleotide chains that coil around one another to form a double helix. The DNA backbone is composed of alternating phosphate groups and deoxyribose sugar molecules. DNA is made up of four nucleotides namely, adenine (A), thymine (T), guanine (G), and cytosine (C).

RNA, also known as ribonucleic acid, is a polymeric molecule crucial for coding, decoding, control, and expression of genes in a variety of biological processes. RNA is typically single-stranded in nature. The RNA molecule consists of a backbone with alternating phosphate groups and ribose sugar molecules. Each sugar has one of the four bases adenine (A), uracil (U) (instead of thymine), cytosine (C), or guanine attached to it (G).

DNA is double-stranded in nature unlike RNA which is single-stranded. The hydrogen bonds connecting the nucleotide bases of the two strands of DNA release free energy thus making DNA thermodynamically stable.

RNA contains ribose sugar rather than deoxyribose sugar in DNA. The ribose sugar contains 2′-hydroxyl group on the pentose ring. This property of RNA makes it more susceptible to hydrolysis.

Thymine shows more resistance to photomutation compared to Uracil. This makes DNA more resistant towards mutations caused due to radioactivity.

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The change in enthalpy and entropy when liquid ammonia at 270 K is compressed from its saturation pressure of 381  KPa to 1200 KPa (in the question / and w are the typo mistakes) will be -2.66 × 10⁻³ KJ/Kg.K

Initial volume (V1) = 1.551 × 10⁻³ m³Kg⁻¹

     β = 2.095 × 10⁻³K⁻¹

     ΔH = CpΔT + [V-T(ΔV/ΔT)]ΔP

     ΔS = CpΔT - (ΔV/ΔT)p ΔP

For isothermal conditions

    ΔH =  [V-T(ΔV/ΔT)]p ΔP

    ΔH = V - (1 - βT) ΔP

Let V and β constant

    ΔH = V (1 - βT) ΔP

    ΔH = 1.551 × 10⁻³ m³Kg⁻¹ [1 - ( 2.095 × 10⁻³  × 270)] (1200 - 381)

   ΔH = 0.557 KJ/Kg

Now calculate dS

    ΔS = -(ΔV/ΔT)p ΔP = - βV ΔP

    ΔS = βV ΔP

    ΔS = -1.55 × 10⁻³ × 2.095 × 10⁻³ (1200 -381)

    ΔS = -2.66 × 10⁻³ KJ/Kg.K

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jot down the varieties of teas and herbs that may be found in a traditional chemical pharmacy, ask amchis what plants they use to make their medicinal products, is referred to as ethnopharmacology.

There are essentially only two parts to a traditional chemical pharmacy. A formula, which denotes the creation of a new medicinal by combining two or more ingredients, is different from a single medicinal, which refers to one specific chemicals. Ethnopharmacology focuses on the exchange of knowledge and understandings about how people use plants, fungi, animals, microbes, minerals, and their biological and pharmacological effects based on the standards established by international treaties. With the exception of vegetables and other plants used for macronutrients, herbs are a commonly used and prevalent group of plants. Is called as ethnopharmacology.

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Brainly is a platform where students, parents, and teachers can assist others with their homework questions. The website is designed to help students improve their skills in subjects such as English, mathematics, science, and social studies.

"Brainly is an excellent website for getting assistance with any homework assignment." There is a wonderful community that responds to your questions promptly, as well as a community of moderators who keep the site safe for all users." Free Homework Help- Brainly Basic is completely free! 24/7 Homework App - Unrestricted access, anywhere and at any time. Superfast, Homework Answers and Explanations - Questions are answered in minutes and moderated.

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Answer:

to help you find answers to your questions.

Explanation:

Low - The generation of nitrates (NO 3-) requires oxygen, so the oxygen levels will be low.

The complete question is :Nitrates are made by converting ammonia (NH3) to nitrite (NO2-) and then to nitrate (NO3-). What do you predict the O2 levels in the river will be? High - Nitrate (NO3-) contains more oxygen atoms than ammonia (NH3), so the O2 will be high. Normal - Even though oxygen atoms are added to nitrogen during the nitrogen cycle, the levels of O2 in the water will be normal. Low - The generation of nitrates (NO3-) requires oxygen, so the oxygen levels will be low.

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The appropriate oxidizing agents for the preceding procedure are PCC in CH2Cl2 and H2CrO4 produced from Na2Cr2O7 in aqueous sulfuric acid. demonstrating the ability to manufacture 1-phenylcyclopentene

The organic compound 1-phenylcyclopentene has the chemical formula CH3C5H9. It is a colourless, combustible liquid with a light scent. It belongs to the petroleum fraction called naphthene which is oxidizing agent. The most common way to get it is in a combination with cyclohexane. It is primarily transformed to benzene in naphthene reformers.

Since it is not exactly planar, the C6 core of 1-phenylcyclopentene has the ability to pucker and reduce structural stress. Through a chemical reaction, 1-phenylcyclopentene is created when cyclopentanol is oxidizing to yield cyclopentanone. This is the method used to make 1-phenylcyclopentene.

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The ions formed by Na and by Cl is Na forms a +1 ion, and Cl forms a -1 ion.

What is ions?
An molecule or atom with such a net electrical current is known as an ion. Conventionally, the charge of the an electron is thought to be negative; this charge is equal to and opposite to a charge of the a proton, which would be thought to be positive. Because the total amount of electrons in an ion is greater than the total number of protons, the net charge of the an ion is not zero. A negatively charged ion called an anion has more protons than electrons compared to a chloride ion called a cation. Electrostatic force causes opposite electric charges to be drawn towards one another, causing cations and anions to attract one another and easily form ionic compounds.

Na forms a +1 ion, and Cl forms a -1 ion.
This is because Na has one valence electron and Cl has 7 valence electrons.
When Na loses its valence electron it becomes a +1 ion, and when Cl gains one more electron it becomes a -1 ion.
This is due to the fact that Na has a lower electronegativity than Cl, and thus is more likely to lose an electron in a chemical reaction.

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Manganese metal can be prepared by the thermite process as it is the limiting reactant.

The balanced equation for the reaction. This is given below:

[tex]4Al(s) + 3MnO2(s) — > 3Mn(l) + 2Al2O3(s)[/tex]

Determination of the masses of [tex]Al[/tex] and [tex]MnO2[/tex] that reacted from the balanced equation. This is illustrated below:

Molar Mass of Al = 26.98g/mol

Mass of Al from the balanced equation = 4 x 26.98 = 107.92g

Molar Mass of MnO2 = 86.94g/mol

Mass of [tex]MnO2[/tex] from the balanced equation = 3 x 86.94 = 260.82g

From the balanced equation above,

107.92g of Al reacted with 260.82g of MnO2 reacted.

Determination of the limiting reactant. This is illustrated below:

Let us consider using all the 203g of Al given to verify if there will be any leftover for [tex]MnO2.[/tex] This is illustrated below:

From the balanced equation above,

107.92g of Al reacted with 260.82g of MnO2,

Therefore, 203 g of Al will react with = (203 x 260.82)/107.92 = 490.61g of [tex]MnO2.[/tex]

Therefore, Manganese metal can be prepared by the thermite process as it is the limiting reactant.

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It can be summed up as the mass of solute dissolved in a 100 mL volume of solution. Therefore, 75 g of NaOH would be present in 300 ml of a $25 (m/v) NaOH solution.

Caustic Soda Solution (NaOH 50%) Caustic Soda Solution is a clear, flavorless, odorless liquid that has a slight viscosity. Any ratio results in its miscibility with water. Caustic soda solution reacts strongly with alkaline and is extremely corrosive to a variety of materials.

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In humans, height, skin color, hair color, and eye color are examples of polygenic traits.

A polygene is a member of a collection of non-epistatic genes that interact additively to steer a phenotypic trait, consequently contributing to more than one-gene inheritance, a sort of non-Mendelian inheritance, in preference to unmarried-gene inheritance, which is the core belief of Mendelian inheritance.

A polygenic trait is a feature, which includes height or skin coloration, that is encouraged by way of or extra genes. because a couple of genes are concerned, polygenic developments do not comply with the styles of Mendelian inheritance. Many polygenic traits are also stimulated by means of the environment and are called multifactorial.

Most inherited trends in animals are polygenic. a few examples are: conformation, kind, size, sturdiness, disorder resistance, temperament, velocity, milk and egg production, growth fee, maturation and sexual adulthood rate, and numerous inherited diseases.

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12.75 is the pH of the solution prepared by mixing Ca(OH)2 and NaOH of volume 100ml and 50.00ml assuming the volumes as additive.

The solution is prepared by mixing 100.00 mL of 0.020 M Ca(OH)2 with 50.00 mL of 0.100 M naOH. The pH of a solution is a measure of hydrogen ion concentration, which in turn is a measure of its acidity. Pure water dissociates slightly into equal concentrations of hydrogen and hydroxyl (OH−) ions. For a neutral solution, [H+] is 10−7, or pH = 7. Basically, pH is defined as the negative log base 10 of the hydronium concentration. The pH is a logarithmic measure of the concentration of hydrogen ions in a solution. Because pH is on a log scale that means that increasing the pH by 1 corresponds to multiplying the concentration of H+ ions by 1o.

[OH^-] = (100.00 x 0.020 x 2  +  50.00 x 0.100) / 150.00

          = 0.06 M

pOH = -log0.06 = 1.22

pH = 14 - pOH

      =  14 - 1.22 = 12.78

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The alkynes would be expected to give these results is 2 - hexyne.

The alkynes are the compounds which contains carbon triple bond carbon.

The 2- hexyne undergoes hydration forms two ketones . the reaction is given as follows :

CH₃CH₂CH₂C≡CCH₃  +  H₂O  ---->CH₃CH₂CH₂C=OCH₂CH₃  +

                                                                            CH₃CH₂CH₂CH₂C=OCH₃

If the alkyne is symmetrical than the hydration product is single ketone product is formed. if the alkyne is asymmetrical than the hydration product is  formation of two ketones takes place. so the the alkynes with from two ketones according to the given ques is 2 - hexyne. the terminal alkyne form only one ketone as a product.

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This covers preventative steps including washing your hands, cleaning, disinfecting, sterilizing, and immunizing. A healthcare setting's potential infection outbreaks are investigated, managed, and subject to surveillance.

By preventing, diagnosing, treating, minimizing, or curing disease, illness, injury, and other physical and mental impairments in humans, healthcare, often known as healthcare, aims to enhance people's overall well-being. Health care is provided by specialists in the medical area and related professions. Health care includes the practice of medicine, dentistry, pharmacy, midwifery, nursing, optometry, audiology, psychology, occupational therapy, physical therapy, sports training, and other related health professions. It encompasses work done in public health as well as in the provision of primary care, secondary care, and tertiary care.

Access to healthcare may differ between nations, groups, and people, depending on social and economic factors as well as health policy. To "employ personal health services in a timely manner to obtain the greatest potential health results," is to provide health care services.

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The statement ' some chemical reactions release heat, and others absorb heat. In an exothermic reaction, heat is released and the temperature of the system rises. In an endothermic reaction, heat is absorbed and the temperature of the system decreases' is true.

In the field of science, an exothermic reaction can be described as such a reaction in which heat is released. On the other hand, an endothermic reaction is such a reaction in which heat is absorbed from the environment.

As heat is released into the atmosphere, the temperature will rise for an exothermic reaction. On the other hand, as heat is taken, the temperature of the surrounding atmosphere will lower for an endothermic reaction.

The question will correctly be written as:

observe: some chemical reactions release heat, and others absorb heat. in an exothermic reaction, heat is released and the temperature of the system rises. in an endothermic reaction, heat is absorbed and the temperature of the system decreases. Is the observation true or false?

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Generally, non-metals are likely to form negative ions. Non-metals come to the right-hand side of the periodic table.

As we add electrons to the same valence shell and also add protons to the nucleus, atoms in general undergo a contraction in atomic radius, with the smallest atoms to the right of the Periodic Table. And thus elements to the right side of the Periodic Table, like fluorine, chlorine, and oxygen, tend to be oxidizing, i.e. they accept electron density as a consequence of their unshielded nuclear charge.

And so nitrogen, oxygen, fluorine, chlorine, etc. tend to form negative ions. The parent atoms are oxidizing species.

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The function of the thick albumen in an egg is it provides the liquid medium to which the embryo develops. it serve to keep yolk in center.

The albumen consist of the 4 layers that thick and in thin consistencies. the yolk outward, they are designated. the thinner thick layer is chalaziferous white. the albumen provide the liquid  medium  in which the embryo develops it contains the large amount of the protein that is very necessary for the proper development in the egg. the fresh egg contain white cords attached to the yolk sac.

Egg albumen contains essential amino acids and full of protein.

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cAMP results in the activation of an enzyme that amplifies the signal by acting on many substrate molecules.

This G protein - coupled receptor signaling mechanism involves the following events. When the ligand or first messenger binds to the receptor, the receptor changes its conformation and binds to the G protein complex. there is a molecular substitution in the Gα subunit GDP is replaced by a GTP. This replacement causes the activation of the Gα subunit. The active Gα subunit then separates from the β and γ subunits and moves laterally in the membrane to activate an effector. When the interaction is completed, the GTP bound to the Gα subunit is hydrolyzed back to GDP and dissociated from Gα.The two most common messengers are cAMP and calcium. This results in the activation of an enzyme.

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Answer: deciding on the appropriate equipment

Answer: HBr

Explanation:

The limiting reactant in the reaction is HBr.

Limiting reactant is the defined as the reactant which determines the maximum amount of product(s) that will be formed. As when it's all used up, the reaction stops and cannot proceed further, since the other reactant doesn't have anything to react with.

The limiting reactant provides the information about the amount of the products formed, as opposed to the reactant in excess which doesn't provide any valuable information.

The given reaction is already balanced. Hence, it gives us the information that 2 moles of Al requires 6 moles of HBr.

2Al + 6HBr ⇒ 2AlBr₃ + 3H₂

If 8 moles of Al will be reacted, it will require 24 moles of HBr, but we only have 8 moles of HBr.

On the other hand, if 8 moles of HBr will be reacted, it will only require 8/3 moles of Al which will leave excess Al unreacted. Reacting 8 moles of HBr with 8 moles of Al will produce 8/3 moles AlBr₃ and 4 moles H₂.

Hence, the limiting reactant is HBr.

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Option -( A ) 8.0 atm. The pressure of the syringe containing 0.10 g of nitrogen gas at 0.0 degrees Celsius is 8.0 atm. .

The ideal gas equation is a equation of state of a hypothetical ideal gas. It is expressed as,

                  PV = n RT

 where, P is the  Pressure - Unit: (kPa or Pa)

              V is the Volume - Unit: (L)

              n is Number of Moles - Unit: (mole)

             R is Universal Gas Constant - Unit: (8.31 L• kPa/ mole• K)

             T is Temperature - Unit: (K)

The ideal gas law states that the product of the pressure and the volume of one gram molecule of an ideal gas is equal to the product of the absolute temperature of the gas and the universal gas constant. It is used as a prediction of the behavior of many gases, when subjected to different conditions. A 10.0 ml syringe contains 0.10 g of nitrogen gas at 0.0 degree Celsius.

    n = m /MM

        = 0.10 / 28 = 0.0036 mole

P = n RT / V

   = 0.0036(0.08206)(273.15) / 0.010

P = 8 atm.

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Because even little amounts of the natural acids present in some meals can cause metal to pit or discolor, it is not advised to use pewter as a food container.

Elegant pewter pitchers are excellent for serving iced tea, iced water, or even wine. We make each of handmade pewter pitchers using techniques that have been in use for generations. They are lead-free and food-safe, just as all other our pewter goods are.

Modern pewter is safe to use and lead-free. It is mostly comprised of tin, with some copper and antimony. The goods have been guaranteed lead-free and perfectly safe to be used for all types of food and drink, according to one maker.

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Fluorine gas and water vapor react to form hydrogen fluoride gas and oxygen. The volume of hydrogen fluoride produced by a reaction if 3.05 ml of water were consumed is 6.10 ml.

The balanced reaction between fluorine gas and water vapor is

2F₂(g)+2H₂O(g)→4HF(g)+O₂(g)

To find out the volume of hydrogen fluoride produce, we need to use Avogadro's law equation which is given as

V₁/n₁=V₂/n₂

Where, V₁=3.05 ml, n₁=2, n₂=4, V₂=?

Rearrange the formula for V₂

V₂=(V₁×n₂/n₁)

Plug all the values in the formula

V₂=(3.05 ml×4/2)

V₂=12.2 ml/2

V₂=6.10 ml

Therefore, the volume of hydrogen fluoride(HF) produced by the reaction if 3.05 ml of water were consumed is 6.10 ml.

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