Select Oxidation Numbers For The Metals In Each Of The Following Coordination Compounds. (a)K[Au(OH)4] (2024)

The given salt K4[Pt(CO3)2F2] is Potassium dicarbonatodifluoroplatinate (II) as per the IUPAC nomenclature.

What is IUPAC nomenclature?

The International Union of Pure and Applied Chemistry (IUPAC) developed the IUPAC nomenclature as a standard for naming organic molecules and compounds (IUPAC). Every chemical structure has a distinct, clear name thanks to its design. Each molecule or compound is given a name according to the IUPAC nomenclature depending on its structure.

In this case, the prefix "di" is utilized because the carbonate ion is acting as a monodentate ligand. If a bidentate ligand had been present, the prefix "bis" would have been used.

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There are three electrons for the central metal ion .

What are transition metal and what are the properties of transition metals?

Mainly d- block elements called Transition metal . Any of various chemical elements that have valence electrons.Electrons that can participate in the formation of chemical bonds in two shells instead of one.

There properties are , very good conductor of heat and electricity , they are hard and tough , they have high densities and they are usually worked as catalyst.

The oxidation number of CN is -1 and the total oxidation number on the whole compound is -2.

x+6(-1)→-2

x=4

the electronic configuration of Mn is 3d⁵4s² ,if we remove 4 electrons , then there are 3 electrons are left for central metal .

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The grams of Al(OH)₃ can be neutralized by 300ml of 0.250m hydrochloric acid is 1.9500 gram

The moles of HCl = Molarity × volume in liters

= 0.250 × 0.3

moles of Hcl = 0.075 mol

The balanced equation may be

Al(OH)₃ + 3HCl → AlCl₃ + 3H₂O

1 mol of Al(OH)₃ neutralizes 3 mol of Hcl

To neutralizes 0.075 mol of Hcl

= 0.075 / 3

= 0.025 mol of Al(OH)₃

Mass of Al(OH)₃ = Mole × molar mass

= 0.025 × 78.0025

= 1.9500 gram

Hence, the gram of Al(OH)₃ can be neutralized by 300 ml of 0.250 HCl is 1.9500 gram.

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The value of n (number of moles of solute) will be 5.55 moles.

Molarity is the measure of the concentration of a solution. It is the number of moles of a solute in a specific volume of solution. The volume should always be in Litres. Molarity is denoted by M.

Moles are the unit of measurement of the mass any substance holds. It is the SI unit. It is denoted by n.

According to the question

Molarity of solution = 7. 30 mol/L

Volume of solution = 0.760 L

Formula for molarity (M) = number of moles of solute (n) / Volume of solution

To find the number of moles, it can be rewritten as : n = M × V

Therefore n = 7. 30 mol/L × 0.760 L

n = 5.55 moles

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The number of significant figures in each of the following measured quantities: (a) 3.774 km = 4 (b) 205 m² = 3 (c) 1.700 cm = 4 (d) 350.00 K = 5 (e) 307.080 g = 6 (f) 1.3 × 10³ m/s = 2.

What are significant figures?

These are minimum number from zero to nine which are required for reporting any measurement in significant figures digit is uncertain.

The starting zero are not significant figures, decimal is not a significant figures, ending zero after decimals are significant figures and ending zero before without decimal is not significant figures.

Therefore, number of significant figures in each of the following measured quantities: (a) 3.774 km = 4 (b) 205 m² = 3 (c) 1.700 cm = 4 (d) 350.00 K = 5 (e) 307.080 g = 6 (f) 1.3 × 10³ m/s = 2.

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AgNO₃ will act as the oxidising agent.

For the given chemical equation:

Cu + 2AgNO₃ → 2Ag + Cu(NO₃)₂

Half reactions for the given chemical reaction:

Reducing agent:

Cu → Cu²⁺ + 2e⁻

Copper is a reducing agent because it is losing 2 electrons, which causes an oxidation process.

Oxidising Agent:

Ag⁺ + e⁻ → Ag

The silver ion undergoes a reduction process and is regarded as an oxidizing agent since it is acquiring one electron per atom.

Hence, AgNO₃ is considered as an oxidizing agent and therefore the correct answer is Option B.

Oxidising and Reducing agentsAn oxidizing agent is a substance that reduces itself after oxidizing another material. It passes through a reduction process in which it obtains electrons and the substance's oxidation state is decreased.A reducing agent is a chemical that oxidizes after reducing another material. It passes through an oxidation process in which it loses electrons and the substance's oxidation state increases.

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The concept of Standard electrode potential can be used to accomplish this.

Standard Reduction Potential

The standard reduction potential belongs to the group of potentials known as standard electrodes or standard cells. The difference in voltage between the cathode and anode is known as the standard cell potential. . All of the standard potentials are determined using 1 M solutions, 1 atm, and 298 K.

The probability of reducing a species is known as its standard reduction potential. It is expressed as a reduction half reaction in writing. Below is an illustration where "A" stands for a generic element and "C" represents the charge.

Standard Reduction Potential:

A⁽⁺+Ce⁻→A

For example, copper's Standard Reduction Potential of Eo=+0.340V) is for this reaction:

Cu²⁺+2e⁻→ Cu

The standard reduction potential and the standard oxidation potential are quite similar. It is the propensity of a species to undergo oxidation under normal circ*mstances. Additionally, it is written as a half reaction.

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The answer is- 142.27 food calories are in the taco.

Heat capacity-The amount of energy needed to increase the temperature of a substance by one degree Celsius.

How heat released or gained is related to heat capacity?

The heat of a system when the temperature is raised is calculated as:

[tex]q = m* C*[/tex]Δ[tex]T[/tex]

Where m is the mass of substance.

C is the heat capacity

and Δ[tex]T[/tex] is the change in temperature.

Now, for the given taco bell, the heat capacity of the calorimeter = 31.2/°C. It means that for 1 degree rise of temperature of calorimeter, 31.2 kJ of heat is needed.Therefore, if the change in temperature is 22.8 °C, the heat that come from taco is-

[tex]Heat\ = (22.8 ^{0}\ C) * (31.2 kJ/ ^{0}\ C) = 711.36\ kJ[/tex]

Now, the above heat is converted into food calories as-

1 kJ = 0.2 food calories

Thus, the food calories in the taco are-

[tex]Food\ Calories\ in\ taco = (711.36\ kJ) * (0.2 Food\ calories/ kJ) = 142.27\ calories[/tex]

Hence, there are 142.27 food calories in the taco.

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A refrigeration lubricant made from refined crude oil and used only with CFCs and HCFCs describes Mineral Oil (MO) lubricants.

What is the role of Mineral Oil?

Due to its capacity to aid in reducing water loss from skin and keeping it moisturized, mineral oil is a highly purified, lightweight ingredient used in baby lotions, cold creams, ointments, and many other cosmetic and personal care products.

It does not clog pores because the highly refined, pure mineral oil used in cosmetic and skincare products is non-comedogenic.

Due to its relatively low likelihood of creating a skin reaction or spoiling in hot, humid regions, mineral oil is a component of products for use on sensitive skin because it is also an inert, stable substance.

It's also crucial to remember that the "crude" mineral oil is not the same as the highly refined, pure mineral oil used in cosmetics and personal care products.

Hence, the correct answer is mineral oil.

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Answer: sodium chloride

Explanation:

The [H₂CO₃] / [HCO⁻₃] ratio in a patient whose blood pH is 7.20= 6.8 to 1.

Steps

By using Henderson-Hasselbalch equation:

pH = pKa + log ([HCO³⁻] / [H₂CO₃])

pH = -log Ka + log ([HCO³⁻] / [H₂CO₃])

7.2 = -log (4.3 × 10⁻⁷) + log ([HCO³⁻] / [H₂CO₃])

log ([HCO³⁻] / [H₂CO₃]) = 0.83347

[HCO³⁻] / [H₂CO₃] = 10^0.83 = 6.8

Hence, the ratio of HCO³⁻ to H₂CO₃ would be 6.8 to 1.

What does the blood's pH indicate?

Blood's pH indicates how acidic it is. Blood in arteries typically has a pH between 7.35 and 7.45. The blood pH is regulated by a complex system of mechanisms and feedback loops that maintain the body functioning normally. A health issue that needs to be addressed can be indicated when the pH of the blood changes.

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Main Answer: The standard electrode potential of galvanic cell constructed from barium and manganese electrode is 4.097.

Explanation:

When the galvanic cell constructed between Manganese and Barium, the half reactions will be as follows:

Mn2+(aq) + 2e-⟶ Mn(s) E1 = −1.185

Ba2+(aq) + 2e-⟶ Ba(s) E2 = −2.912

By considering the above two reactions, the standard electrode potential can be calculated.

The galvanic cell standard electrode potential is given by E1 + E2 = 1.185 + 2.912 = 4.097 volts

What is standard electrode potential?

Standard electrode potential is defined as the measure of reducing power of any compound or element. Its units are volts.

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Answer:

1.727

Explanation:

From the list of standard reduction potentials, we see that the reduction of manganese has a larger numerical potential value than the reduction of barium. Thus, manganese will be the cathode and barium will be the anode. Using the equation forE∘cell:E∘cell=Ecathode−EanodeWe compute thatE∘cell=-1.185V−(-2.912V)=1.727V.

The mass of iron sample will be 585 grams.

According to the question,

Density of iron sample = 7.80 g/cm³

Volume of water displaced = 75.0 ml

1 ml = 1 cm³

Therefore, 75 ml = 75 cm³

Density is defined as the mass (m) of a substance per unit volume (V). It can be generally denoted by ρ. Therefore, ρ = m/V.

Mass is the amount of matter present in a substance. Volume is the 3-D space occupied by a substance.

In the given question density and volume are provided and to find the value of mass, the formula can be rewritten as: m = ρ × V.

Hence, m = 7.80 g/cm³ × 75 cm³

m = 585 grams.

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Cost effectiveness evaluation can be done by calculating the cost per ml of antacid and also by palatability test.

How to evaluate the cost effectiveness of Antacid ?

Two commercially available antacids are evaluated and compared by:

determining the number of moles of H⁺ neutralized per gram of each antacid.calculating the cost effectiveness of each antacid.

Acid indigestion is a common ailment caused by the overproduction of stomach acid, HCl . Over-the-counter antacids provide some relief from the symptoms of acid indigestion. They are generally made up of some mixture of weak bases such as Mg(OH)₂ , Al(OH)₃ , and CaCO₃ that can react with HCl as shown in these net ionic equations:

H⁺(aq)+OH⁻(aq)⟶H₂O(l)

2H⁺(aq)+CO₂⁻³(aq)⟶H₂O(l)+CO₂(g)

The amount of moles of H⁺ neutralized per gram of antacid will be calculated using the titration technique. In the "back-titration," an excessive amount of HCl will be combined with some antacid. In the presence of the indicator bromophenol blue and the H⁺ that has not yet reacted with the antacid, the H⁺ is subsequently titrated with standardized NaOH to a blue end point.

The amount of OH⁻ required to witness a color shift is considered the end point. The end point is a close approximation of the equivalence point since just the smallest excess of OH⁻ over H⁺ may affect the color of an indicator. (The titration error is the difference between the end point and the equivalence point.) The amount of excess H⁺ that had not been neutralized by the antacid is equal to the amount of OH⁻ that has been added at the equivalency point. One may determine how many moles of H⁺ the antacid has neutralized by knowing the total moles of HCl that have been added.

Total moles of H⁺ = moles of H⁺ neutralized by antacid + moles of H⁺ neutralized by NaOH

It is impossible to determine the individual moles of OH⁻ and CO₂ since both ion species are present in the antacid. Instead, the amount of H⁺ that the antacid neutralized is discovered. One "equivalent" of antacid is referred to as the quantity needed to neutralize one mole of H⁺.

Total equivalent of antacid = Total mole of H⁺neutralized

The antacid with the lowest price per equivalent is the most cost-effective.

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Answer:

B. Experiments

Explanation:

conducting an experiment is an example of a research method while the other choices are not.

Hope I was able to help you!

A solution comprises solute and solvent that can be in the form of the same or different composition. The water is solvent and the mixture is solute. Thus, option c is correct.

What is a mixture?

A mixture is a solution that may or may not have a definite and uniform composition. They even can have one or more phases. The mixture can be heterogeneous or hom*ogeneous.

Here, the water is the solvent to which the solute, vinegar, and dye are added. The vinegar and dye both are liquid solutes that are added to the solvent to form a solution of definite composition.

Therefore, option c. mixture is the solute and water is the solvent.

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Answer:

The major monobrominated product of the reaction is as follows:

What is Free-radical halogenation?

Free-radical halogenation is a form of halogenation in organic chemistry. Alkanes and aromatics with alkyl substitutes frequently undergo this chemical reaction when exposed to UV radiation. Chloroform, dichloromethane, and hexachlorobutadiene are produced industrially using this reaction. A free-radical chain mechanism drives its progression.Monosubstitution is frequently not the end of halogenation.Dichloromethane, chloroform, and carbon tetrachloride are the products of the chlorination of methane, depending on the circ*mstances of the reaction. When an alkane is chlorinated with non-equivalent hydrogens, the distribution of the various monochloro derivatives that arise can be predicted. Iodine is typically too unreactive to generate a radical, making free-radical iodination impossible. Free-radical halogenation often continues for the other halogens.

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A sample of silicon has an average atomic mass of 28.084amu. In the sample, there are three isotopic forms of silicon. About 92.22% of silicon atoms are 27.9769amu, which have the mass of 28Si; about 4.68% are 28.9764amu, which have the mass of 29Si, and the isotope 30Si, makes up the remaining 3.10%. Calculate the atomic mass of 30Si. Report your answer with three significant figures The percentage abundance for isotope is 3.09 %.

What is isotopes?

Isotopes are two or more atom types that share the same atomic number (number of protons in their nuclei), location in the periodic table, and chemical element but have distinct nucleon numbers (mass numbers) as a result of having a different number of neutrons in their nuclei. Although the chemical properties of each isotope of a given element are nearly identical, they differ in their atomic weights and physical characteristics.

The word "isotope" is derived from the Greek words "isos" and "topos," both of which imply "the same location." As a result, the name refers to the fact that various isotopes of a given element occupy the same spot on the periodic table. Scottish physician and author Margaret Todd first used it in a recommendation in 1913.

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In the rising of bread, 1 molecule of dextrose sugar yields 2 molecule(s) of ethyl alcohol plus 2 molecule(s) of carbon dioxide through the action of yeast.

The small amount of alcohol evaporates during baking.

12 hydrogen atoms are involved in this reaction.

What is the chemical reaction in the rising of bread?

The rising of bread is the due to the conversion of glucose sugar to bread to alcohol with the release of carbon dioxide.

The evolution of the gas, carbon dioxide is responsible for the rising of bread of bread.

The equation of the reaction is given below as follows:

C₆H₁₂O₆ + Yeast → 2 C₂H₅OH + 2CO₂

1 molecule of dextrose sugar yields 2 molecule(s) of ethyl alcohol plus 2 molecule(s) of carbon dioxide through the action of yeast. The small amount of alcohol evaporates during baking. 12 hydrogen atoms are involved in this reaction.

In conclusion, the rising of bread is due to action of yeast on glucose.

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A cherry red complexion would be the least trustworthy result when evaluating a client who had carbon monoxide poisoning suspicions.

Carbon monoxide poisoning:

When present in sufficient quantity in the surrounding air, the odorless, colorless, and toxic gas known as carbon monoxide (CO) can result in rapid sickness and death. Using alternative fuels or electrical for warming, chilling, or cooking during power outages during situations like storms or winter storms can result in carbon monoxide(CO) buildup in a house, carport, or camper, which can harm the occupants and their pets. It is never a good idea to use a generator, grill, camp stove, or any other appliance that burns fuel, kerosene, natural gas, or charcoal inside a house, basem*nt, garage, camper, or even outside next to an apartment window or windows air conditioner.Carbon monoxide poisoning can cause a variety of non-specific symptoms and indications. Migraine, vertigo, fatigue, vomiting, sickness, chest discomfort, and altered mental state are the most typical signs of CO poisoning.

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The cyclo-heptatrienyl anion will be considered as antiaromatic compound.

A cyclic compound with a greater energy electron system due to the existence of a4n delocalizedelectron is what makes up an anti-aromatic chemical.

Due to its eight pi electrons, the cycloheptatrienyl anion (also known as the tropylium anion) should be antiaromatic; yet, the extra lone pair on one carbon could enable that carbon to become [tex]sp^{3}[/tex] hybridized, placing the extra electrons in an [tex]sp^{3}[/tex] orbital. It would become non-planar as well as non-aromatic as a result.

Therefore, the cyclo-heptatrienyl anion will be considered as antiaromatic compound.

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The percent by mass of gold in the mixture will be 34.5%.

How to calculate the percentage?

The following information can be deduced based on the information given:

Density of gold = 19.3 g/cm³.

Density of sand = 2.94 g/cm³

Density of mixture = 4.17 g/cm³

It should be noted that when we find the volume fo gold on a 1cm³ sample, then we can be able to find that mass. The volume of gold will be calculated thus:

4.17 = [(19.3x + 2.95(1 - x)]

4.17 = 19.3x + 2.95 - 2.95x

4.17 = 16.35x + 2.95

x = 0.0746cm³

The mass of gold will be:

= 0.0746 × 19.3

= 1.44

The percent by mass of gold in the mixture will be:

= 1.44/4.17 × 100

= 34.5%

In conclusion, the percent by mass of gold in the mixture will be 34.5%.

What is Mass?

Mass is a physical body's total amount of matter. It also serves as a gauge for the body's inertia, or resistance to acceleration (change in velocity) in the presence of a net force. The strength of an object's gravitational pull to other bodies is also influenced by its mass.

The kilogram is the primary mass unit in the SI (kg). Even though weight is frequently measured using a spring scale rather than a balancing scale and directly compared with known masses, mass is not the same as weight in physics. Due to the lower gravity on the Moon, an object would weigh less than it does on Earth while maintaining the same mass. Given that weight is a force.

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Answer:

b) C > A > B would be the correct answer

The central atom or ion in a coordination entity is the atom or ion to which a predetermined number of ions or groups are bonded in a predetermined geometric arrangement surrounding it.

What is the difference between the metal ion and central metal ions?

A cation with the chemical formula [Mn]z+ that is dissolved in water is known as an aqua ion or metal ion in an aqueous solution. Li+ and Be2+ have solvation numbers, n, of 4, while elements in periods 3 and 4 of the periodic table have solvation numbers, n, of 6.

The metal ion to which the ligands are attached is at the center of a coordination complex.

The core of a coordination complex is the metal ion to which the ligands are bound.

The complex compounds' central metal ions contain empty d orbitals. They take the single electron pair from ligands. So they function as Lewis acids.

The central atom or ion in a coordination entity is the atom or ion to which a predetermined number of ions or groups are bonded in a predetermined geometric arrangement surrounding it.

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The maximum radiation pressure exerted by sunlight in space on a flat black surface is 4.5 × [tex]10^{-6}[/tex] P a. So, the correct option is (b).

Radiation pressure is the name for the force electromagnetic wave particles exert on a surface. It is inversely related to the wave's speed. Given data

Solar constant ( S ) = 1350W / m ^2

Now, the radiaton pressure is given by

P = 2 S /c

where c is the speed of the light

P = 2 × 1350 /3 × 10 ^8

P = 9 × [tex]10^{-6}[/tex] P a

For a black surface, P = 4.5× [tex]10^{-6}[/tex] P a

Therefore, maximum radiation pressure exerted by sunlight in space on a flat black surface is 4.5 × [tex]10^{-6}[/tex] P a

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Ksp is an equilibrium constant like Keq but specifically for dissolving salt while Keq is more for reactants turning into products..

More about ksp and keq:

The main distinction between Ksp and Keq is that the former refers to a substance's solubility, whilst the latter refers to the equilibrium state of a specific reaction.

The solubility product constant is abbreviated Ksp, and the equilibrium constant is abbreviated Keq. Ksp is a specific kind of equilibrium constant that exclusively pertains to the solubility of solids. We can use the more broad term keq to identify the characteristics of any kind of equilibrium.

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In picture one, there are four electrons, one valance electrons and two shells, in image two there are three electrons, one valance electrons and two shells whereas there are 13 electrons, three valance electrons and three shells.

What is Electrons, Valence Electrons, and Electron Shells Numbers?

Electrons:

An electron is a negatively charged particle which can be either bounded with to an atom. Electrons belong to the first generation of the lepton particle family, and are generally thought to be elementary particles because they have no known components or substructure.

Valence Electrons:

Valence electrons are those electrons which are present in outermost shell or in valence shell or energy level of an atom. For example, oxygen has six valence electrons, two in the 2s subshell and four in the 2p subshell.

Electron Shells Numbers:

Each shell can contain only a fixed number of electrons: the first shell can hold up to two electrons, the second shell can hold up to eight (2 + 6) electrons, the third shell can hold up to 18 (2 + 6 + 10) and so on.

So we can conclude that In picture one, there are four electrons, one valance electrons and two shells, in image two there are three electrons, one valance electrons and two shells whereas there are 13 electrons, three valance electrons and three shells.

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The correct option is (B) Addition of an inert gas to the reaction mixture.

A gas is considered to be inert if, under a specific set of circ*mstances, no chemical reactions occur.

Does the addition of a inertgas change concentration?

An inert gas effectively doesn't change the concentration of the reactants and products because it doesn't react with them. Additionally, because of the constant volume, the concentrations are unaffected. There will be no effect on equilibrium.The system's overall pressure will rise as a result, but the equilibrium condition will remain unaffected. That is, there won't be any change in the partial pressures or concentrations of the reactants or products.

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I understand that the question you are looking for is "which of the following changes in reaction condutions will not alter the equilibrium concentrations?"

(A) Decreasing the pressure or volume

(B) Addition of an inert gas to the reaction mixture

(C) Addition of reactant or products

(D) Increasing the temperature"

Milk of magnesia helps to neutralize stomach acid because it is a strong base.

Acid: Acids have a sour taste and turn certain dyes red.

It gives off hydrogen ions in water and forms salts by combining with certain metals.

Acids are substances that has pH greater less than 7.

Base: Base turn certain dyes blue.

It takes off hydrogen ions in water and forms salts by combining with certain metals.

It has pH greater than 7.

When acid and base combine, salt is formed.

Milk of magnesia is a laxative that is thought to work by drawing water into the intestines, an effect that helps to cause movement of the intestines.

It is an antacid.

Hence, Milk of magnesia helps to neutralize stomach acid because it is a strong base.

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