What is the functional formula of ketones?

The following statements is accurate: D.)compound made of a metal and  nonmetal is hydrophilic.

Hydrophilic molecule or portion of molecule is one whose interactions with water and other polar substances are more thermodynamically favorable than interactions with oil or other hydrophobic solvents. They are charge-polarized and capable of hydrogen bonding.

Degree or extent to which molecule attracts water is known as the 'hydrophilicity' of that molecule. Some of the common examples of hydrophilic substances are : sugar, salt, starch, and cellulose.

Hydrophilic means that it tends to be attracted to water or that it tends to easily dissolve in, mix with, absorb, or to be saturated by water.

To know more about hydrophilic, refer

https://brainly.com/question/1600542

#SPJ4

For the reaction, the Kc is 82.2.

We know that the reaction have been given as; COCl2(g) ⇔ CO(g) + Cl2(g). We can then know that the initial concentration of the  COCl2 =  1. 60 moles/1. 00 liter = 1.6 M

Since the equilibrium concentration is 1.57 M, the equilibrium concentration of  COCl2 =  1.6 M - 1.57 M = 0.03 M

Then the Kc is;

[CO] [Cl2]/[COCl2 ]

Kc = (1.57)^2/(0.03)

Kc = 82.2

The reaction as it has been shown here would been seen to have the Kc of 82.2

Learn more about Kc:https://brainly.com/question/29970203

#SPJ1

The number of molecules 5.87 ×10¹⁹ molecules. 12 mg (i.e 0.012 g) of C₆H₅NO₂ contains 5.87 ×10¹⁹ molecules.

Mass of C₆H₅NO₂ = 12 mg

Number of molecules of C₆H₅NO₂ =?

The next step is to change 12 mg to g.

1 mg = 10¯³ g

Therefore,

12 mg = 12 mg × 10¯³ g / 1 mg

12 mg = 0.012 g

We will then calculate the mass of 1 mole of C₆H₅NO₂.

1 mole of C₆H₅NO₂ = (12×6) + (5×1) + 14 + (16×2)

= 72 + 5 + 14 + 32

= 123 g

We will count the molecules in 12 mg (or 0.012 g) of C₆H₅NO₂.

From Avogadro's hypothesis,

1 mole of C₆H₅NO₂ = 6.02×10²³ molecules

123 g of C₆H₅NO₂ = 6.02×10²³ molecules

Therefore,

0.012 g of C₆H₅NO₂ = 0.012 × 6.02×10²³ / 123

0.012 g of C₆H₅NO₂ = 5.87 ×10¹⁹ molecules.

Thus, 12 mg (i.e 0.012 g) of C₆H₅NO₂ contains 5.87 ×10¹⁹ molecules.

To know more about molecules, visit:

https://brainly.com/question/26044300

#SPJ1

Electrons are subatomic particles that are associated with negative charges and are found in the outermost energy level of an atom.

The positively charged protons and neutral neutrons that make up an atom's nucleus are significantly heavier than electrons, which have a much smaller mass. The electron cloud is created by the constantly moving electrons that surround the nucleus. They are in charge of an element's chemical and physical characteristics and are essential to chemical reactions. In order to maintain overall neutrality, atoms must have an equal number of protons and electrons. Chemical bonding, which affects the structure of compounds and the interactions between molecules, involves electrons. In addition to transferring energy in processes like heat transfer and electromagnetic radiation, they also conduct electricity.

Learn more about Electrons:

brainly.com/question/1255220

#SPJ4

.It is a compound that lost one electron  is true about a molecular ion .

What causes a molecular ion to form?

A mass spectrometer's ionization chamber is where the organic sample is vaporized, where it is then subjected to an electron barrage. With their tremendous energy, these electrons can dislodge an electron from an organic molecule to create a positive ion. Molecular ions are what this ion is known as.

What distinguishes molecules from ions?

The bonding of two or more atoms forms molecules, which are neutral entities. A positively or negatively charged particle is known as an ion. Molecular ions are those that are created when an electron is lost. Radical cations include the molecular ion, for instance.

Learn more about a molecular ion .

brainly.com/question/13354487

#SPJ4

The balanced chemical equation will be  2Mg(s)+O₂(g)⟶2MgO(g)

A balanced chemical equation is an equation for a chemical reaction in which the number of atoms for each of the element in the reaction and the total charge are the same for both the reactant side and the products side. In other words, the mass as well as the charge are balanced on both the sides of the reaction. Chemical equations must be balanced, meaning that the number and kinds of atoms must be the same on both sides of the reaction arrow. The numbers placed in the front of formulas to balance equations are known as coefficients, and they will multiply all the atoms in a formula. For example: the symbol 2MgO; 2 atoms of magnesium and oxygen is present on both the sides of the reactant and product side. Hence the chemical reaction will obeys the law of conservation of mass so the chemical reaction will be Balanced chemical equation.

--The given question is incomplete, the complete question is

"If a chemical reaction does happen, write a balanced chemical equation for it"--

To know more about chemical equation here

https://brainly.com/question/28294176

#SPJ4

Option A, I2, has only London forces.

London forces, also known as dispersion forces, are the weakest type of intermolecular forces. They are present in all molecules, but they are especially important in nonpolar molecules like I2. London forces are caused by fluctuations in the distribution of electrons in a molecule, which result in temporary dipoles. These dipoles can interact with neighboring molecules, creating attractive forces.

In contrast, NH2, OCl2, and SH2 all contain polar covalent bonds, which give rise to additional intermolecular forces, such as dipole-dipole interactions and hydrogen bonding. Dipole-dipole interactions are stronger than London forces, and hydrogen bonding is the strongest type of intermolecular force.

So, while London forces are present in all molecules, they are the only type of intermolecular force present in I2. The other options, NH2, OCl2, and SH2, also have London forces, but they have additional intermolecular forces due to the presence of polar covalent bonds and hydrogen bonding.

To know more about london forces click here:

https://brainly.com/question/20514601#

#SPJ11

The empirical formula is V2O5

Mass of Vanadium= 3.054g

Mass of oxygen= 5.545g

Mass of oxygen= Mass of vanadium oxide-mass of Vanadium

= 5.454g - 3.054g

=2.4g

Atomic mass of Vanadium= 50.94g

Atomic mass of oxygen= 16g

Moles of Vanadium= 3.054/50.94 = 0.0599mol

Moles of Oxygen= 2.4/16= 0.15mol

V:O= 0.0599 : 0.15

= 1 : 2.5

Multiplying by 2

= 2 : 5

Empirical formula is V2O5

What is an empirical formula?

The empirical formula of a chemical compound is the simplest integer ratio of the atoms present in the compound.

A simple example of this concept is that the empirical formula of sulfur dioxide, or SO, would simply be SO, as would the empirical formula of sulfur dioxide, S2O2.

To know more about empirical formula, click the link given below:

https://brainly.com/question/14044066

#SPJ4

The molar solubility of silver arsenate in pure water at 25°C is:

S = (1.0 x 10^-22 / [AsO4^3-])^(1/3)

The molar solubility of silver arsenate in 0.10 M AgNO3 is:

S = 4.22 x 10^-7 M

(a) Molar solubility of silver arsenate in pure water at 25°C can be calculated using the solubility product constant Kp and the expression:

Ag3AsO4(s) = Ag+ (aq) + AsO4^3- (aq)

Kp = [Ag+]^3 [AsO4^3-]

Rearranging, we have:

[Ag+]^3 = Kp / [AsO4^3-]

Taking the cube root of both sides:

[Ag+] = (Kp / [AsO4^3-])^(1/3)

Since Kp = 1.0 x 10^-22, we have:

[Ag+] = (1.0 x 10^-22 / [AsO4^3-])^(1/3)

Since the molar solubility is equal to the concentration of Ag+ ions, the molar solubility of silver arsenate in pure water at 25°C is:

S = (1.0 x 10^-22 / [AsO4^3-])^(1/3)

(b) To calculate the molar solubility of silver arsenate in 0.10 M AgNO3, we need to use the common ion effect. The presence of AgNO3 will increase the concentration of Ag+ ions in the solution and thus decrease the solubility of silver arsenate.

The solubility product constant equation can be written as:

Kp = [Ag+]^3 [AsO4^3-] = S^3 * [AsO4^3-]

Rearranging, we have:

S^3 = Kp / [AsO4^3-]

Since Kp = 1.0 x 10^-22 and [AsO4^3-] = S, we have:

S^3 = 1.0 x 10^-22 / S

S^4 = 1.0 x 10^-22

S = (1.0 x 10^-22)^(1/4) = 7.07 x 10^-6 M

However, this is the solubility in pure water. In 0.10 M AgNO3, the concentration of Ag+ ions is 0.10 M. So, we need to use the equation:

Ksp = [Ag+]^3 [AsO4^3-] = (0.10 + S)^3 S

Rearranging, we have:

S^3 = Ksp / (0.10 + S)^3

Substituting Ksp = 1.0 x 10^-22, we have:

S^3 = 1.0 x 10^-22 / (0.10 + S)^3

Solving for S, we obtain the molar solubility of silver arsenate in 0.10 M AgNO3 as:

S = 4.22 x 10^-7 M

Learn more about molar solubility here:

https://brainly.com/question/16243859

#SPJ4

The equivalence point can be determined by using a pH meter or an indicator, which measures the acidity or basicity of a solution.

In acid-base reactions, the equivalence point is the point at which the amount of hydrogen ions and hydroxide ions are equal, leading to a neutral solution. The pH of the solution will be 7 at this point.

In redox reactions, the equivalence point is the point at which all of the reactants have been consumed and all of the products have been formed. This can be determined by monitoring the change in concentration of one of the reactants over time and finding the point at which the change in concentration levels off.

In titrations, the equivalence point can also be found by adding a known volume of a reagent of known concentration to a solution of the reactant. The reagent will react with the reactant until the equivalence point is reached, at which point the reaction will stop. The volume of the reagent added at the equivalence point can be used to determine the concentration of the reactant.

To know more about equivalence point click here:

https://brainly.com/question/29999744#

#SPJ11

The ideal number of valence electrons and therefore the key for this maze is eight.

This term refers to the electrons found in the outer shell that can bond with other elements, which is the key to creating compounds. Each element has a different number of valence electrons, for example, the elements in the carbon group have 4 valence electrons, while those in the alkali metals group have only 1.

The ideal number is eight, which is the maximum of valence electrons an atom can have.

Learn more about electrons in https://brainly.com/question/1255220

#SPJ1

The vapor pressure of a solution made by dissolving 88.2 g of urea in 303 mL of water at 35°C is 38.8mmHg.

The amount of pressure that the vapours impart to the liquid solvent when they are in equilibrium and at a specified temperature is referred to as the vapour pressure of liquid solutions. The surroundings' temperature and the sort of liquid both impact the vapour pressure.

mass of urea = 88.2g

molar mass of urea  = 60.06 g/mol

Temperature = 35°C

water volume = 303 mL

Vapor pressure of water =  0.9192 mm Hg.

Mass of water = 0.994g/mL x 303mL => 301.2 g

number of moles of water = 301.2/18 => 16.73 mol

number of moles of urea = 88.2/66.06 = 1.469mol

mole fraction of water => 16.73/(16.73+1.469)

                               => 0.9192

Vapour pressure of solution =  0.9192 x  0.9192

                                               => 38.8mmHg

Learn more about vapor pressure here:

brainly.com/question/10441981

#SPJ4

The rate of a reaction refers to the speed at which the reaction takes place.

The rate of a reaction depends on many variables such as, temperature, concentration of dissolved reactants, pressure of gaseous reactants, surface area of solid reactants, or the presence of a catalyst.

In order to measure the rate of a reaction, we must measure the change in amount of a reactant as it is consumed over time, or measure the amount of product formed over time.

When you graph the formation of a product, or consumption of a reactant on the y axis, versus the time of reaction on the x-axis, the slope of this function will provide the rate of the reaction.

What is the rate of a reaction?

To know more about rate of a reaction, click the link given below:

https://brainly.com/question/8592296

#SPJ4

7.9 ml of a 2.0 M solution of boric acid must be added to 600 ml of a solution of 10 mM sodium borate in order for the pH to be 9.45.

To calculate the amount of boric acid solution needed, you need to find out how much hydrogen ions (H+) are present in the initial solution and how much you need to add to the solution to reach a pH of 9.45. The pH of a solution can be calculated using the equation:

pH = -log[H+]

where [H+] is the concentration of hydrogen ions in moles per liter. If the initial pH is 9.45, you can calculate the hydrogen ion concentration in the solution as follows:

[H+] = 10^(-pH) = 10^(-9.45) = 3.16 x 10^(-10) M

To reach a pH of 9.45, you need to add enough boric acid to the solution to bring the hydrogen ion concentration to 3.16 x 10^(-10) M. You can use the following equation to calculate the amount of boric acid needed:

Δn = ΔV * ΔC

where Δn is the change in moles, ΔV is the change in volume, and ΔC is the change in concentration. Since the volume of the initial solution is 600 ml, and the concentration of the boric acid solution is 2.0 M, you can calculate the change in moles of boric acid as follows:

Δn = 600 ml * (3.16 x 10^(-10) M - 10^(-10) M) / 2.0 M = 1.58 x 10^(-7) moles

Finally, you can convert the change in moles to milliliters of boric acid solution using the following equation:

ΔV = Δn / ΔC = 1.58 x 10^(-7) moles / 2.0 M = 7.9 x 10^(-9) liters = 7.9 ml

To learn more about sodium borate, visit:

https://brainly.com/question/14196127#

#SPJ11

It's vapor pressure in a solution made from equal moles of solvent and solute is : b) 50 torr .

Vapor pressure of a solution is dependent on the nature of solute and solvent and their interactions. The vapor pressure of a solution is lower than that of the pure solvent due to the presence of the solute particles interfering with solvent molecules' ability to escape into vapor phase.

Given, pº = 100 torr

p = (1/2) * pº = (1/2) * 100 torr = 50 torr.

So, the vapor pressure of the solution made from equal moles of solvent and solute is 50 torr.

To know more about vapor pressure, refer

https://brainly.com/question/2693029

#SPJ4

The ratio of moles of Mgo to moles Fe is  3 mol Mgo / 2 mol Fe.

A mole is a unit of measurement for the amount of a chemical substance. It is used to quantify the number of entities (such as atoms, molecules, or ions) in a sample of a substance. The mole is defined as the amount of a substance that contains Avogadro's number of entities, which is defined as 6.022 x [tex]10^{23}[/tex] entities per mole. In other words, one mole of a substance contains 6.022 x [tex]10^{23}[/tex] atoms, molecules, or ions of that substance. The mole is used in many aspects of chemistry, including chemical reactions, stoichiometry, and chemical calculations.

The balanced equation for the reaction between magnesium (Mg) and iron (III) oxide (Fe2O3) is:

3 Mg + Fe2O3 -> 2 Fe + 3 MgO.

From the equation, it is clear that for every three moles of magnesium, two moles of iron are produced. Hence, the ratio of moles of MgO to moles of Fe is 3 moles MgO / 2 moles Fe, or simply b) 3 mol MgO / 2 mol Fe.

Learn more about moles:

brainly.com/question/26416088

#SPJ4

The CCl4 molecule's size and form are fully specified by the fact that it is tetrahedral, 2. having 109. ° bond angles.

Tetrahedral electron pair arrangements around the carbon atom in CCl4 necessitate sp3 hybridization. The six bonds to chlorine are created using the six sp3 hybridized orbitals from carbon.

The only intermolecular that exist between Cl2 and CCl4 are London Dispersion Attractions because both molecules are nonpolar and lack any other distinctive properties.

To know more about CCl4 visit :

https://brainly.com/question/30192787

#SPJ4

UV radiation This wave, which has a wavelength ranging from 10 nm to 400 nm, is visible in sunshine.

The following transitions are ranked from lowest to highest in terms of energy, wavelength, and frequency 2 to 1\s 6 to 4 8 to 3 An transition is what? An electron in a hydrogen atom can absorb a photon moving from a lower to a higher energy level, according to the Bohr model of the atom. This is what we mean when we talk about the electron in the atom becoming excited. Now that we are aware that electrons can go from one energy level to another and vice versa, we can use this information to describe the spectrum of the hydrogen atom. The energy of each transition depends on the distance between the transitions.

Learn more about An transition here:

https://brainly.com/question/28831144

#SPJ4

The skydiver is falling at a velocity of 212 kilometres per hour. The speed of the skydiver is 212 miles per hour.

If a skydiver leaps out of a plane and lands at 212 mph, it is necessary to know the skydiver's velocity and speed. Velocity is speed with a direction, whereas speed just exists as a number with a speed unit at the end. While velocity refers to both the speed and direction of an object's motion, speed is the rate at which an object moves along a path over time. The skydiver is falling at a speed of 212 kilometres per hour. 212 kilometres per hour is the speed at which the skydiver is travelling. Speed is the rate at which an object travels along a path over time, as opposed to velocity, which describes the speed and direction of an object's motion. A scalar quantity is speed.

Learn more about Velocity and speed here:

https://brainly.com/question/13003542

#SPJ4

When a gas condenses into the liquid, or the solid melts into the liquid, the phase change occurs. During a phase change the heat is released.

When a gas condenses into the liquid, or the solid melts into the liquid this phase change is called the condensation. The Condensation is the process when the molecules of the gas cool down. When the molecules lose the heat, they lose the energy and will slow down. They come closer to each other gas molecules. Finally the molecules are collect together to form the liquid.

Thus, in the process of the condensation the heat energy is released.

To learn more about phase change here

https://brainly.com/question/11490613

#SPJ4

The atoms are sp² hybridized is when one s orbital and the two p orbitals hybridize to form the three sp² orbitals.

In the sp² hybridization, the one s orbital and the two p orbitals hybridize to form the new three sp² orbitals, each of them consisting of 33% of the s character and 67% of the p character. This type of hybridization is needed when an atom is surrounded by the three groups of electrons.

The number of the hybrid orbitals formed is exactly equal to the number of the atomic orbitals mixing. Hybridization occurs only when the bond formation take place and not in the isolated gaseous atom.

To learn more about hybridization here

https://brainly.com/question/29632963

#SPJ4

Since oxygen belongs to group 6 in the periodic table, it contains 6 valence electrons in its outer shell.

What is the oxygen valency?

Oxygen has an electronic configuration of 2,6. To complete the octet and reach stability, it needs 8 electrons in its outermost shell, which it either accepts or accepts. Consequently, oxygen has a valency of 2.

We can infer from the oxygen atom's electrical structure that there are 6 electrons in the second shell, which is the outermost shell. Consequently, an oxygen atom has six valence electrons in total.

To learn more about valence electrons use link below:

https://brainly.com/question/371590

#SPJ4

The organic compounds that contains the double or the triple bond such organic compounds are called as the saturated hydrocarbon and called as alkenes and alkynes.

The organic compound containing double or the triple bonds called as unsaturated hydrocarbons. The hydrocarbon which contains the the double bond called as the alkene. The general formula for the alkenes are CnH2n. The example of the alkene is the Ethene ( C₂H₄ )

The organic compounds which contain the triple bond are called as alkynes . The general formula for the alkynes are CnH2n-2. The examples of the alkynes is the Ethyne ( C₂H₂)

To learn more about organic compound here

https://brainly.com/question/3790030

#SPJ4

An organism that acts as the principal generator in a food supply chain is referred to as an autotroph in ecology. Through photosynthesis and oxidation, autotrophs use sunlight to produce energy and nutrients.

An oxidation reaction is what?

an reaction in which an element's atoms lose electrons, increasing the element's valence in the process. [French, from the verb oxidiser, which comes from the word oxide; see oxide.] Fifth Edition of the American Legacy® Lexicon of the English Language. Harvard Mifflin Harcourt Publishing Company, 2016. Copyright.

What is the oxidization procedure?

When a molecule, atom, or ion's oxidation state is raised, oxidation takes place. When there is an increase in electrons or a drop in an atom, peptide, or ion's oxidation state, the process is known as reduction. In

To know more about Oxidation  visit:

https://brainly.com/question/9496279

#SPJ4

An organism that acts as the principal generator in a food supply chain is referred to as an autotroph in ecology. Through photosynthesis and oxidation, autotrophs use sunlight to produce energy and nutrients.

An oxidation reaction is what?

An reaction in which an element's atoms lose electrons, increasing the element's valence in the process. [French, from the verb oxidiser, which comes from the word oxide; see oxide.] Fifth Edition of the American Legacy® Lexicon of the English Language. Harvard Mifflin Harcourt Publishing Company, 2016. Copyright.

What is the oxidization procedure?

When a molecule, atom, or ion's oxidation state is raised, oxidation takes place. When there is an increase in electrons or a drop in an atom, peptide, or ion's oxidation state, the process is known as reduction. In

To know more about  molecule visit:

https://brainly.com/question/26044300

#SPJ4

The number of atoms that can participate in the delocalization of electrons determines the number of resonance structures that can be drawn for a given molecule.

Resonance structures are various Lewis structures that can be depicted for a molecule to show how the electrons are distributed throughout the molecule. The total number of atoms that can take part in electron delocalization determines the number of resonance structures that are conceivable for a given molecule. Multiple resonance structures can be created to depict the various ways in which these electrons are exchanged when a molecule has multiple atoms that are able to share electrons. The number of potential resonance structures is constrained if a molecule has a small number of atoms that can take part in electron delocalization.Even though many resonance structures can be depicted, it should be noted that they don't actually exist as separate objects in the molecule. The real distribution of electrons is a mixture of the many resonance structures, whereas these structures just indicate the average distribution of electrons in the molecule.

learn more about resonance structures here;

https://brainly.com/question/29547999

#SPJ4

Answer:

34.0 mL.

Explanation:

The volume of a gas at constant temperature is inversely proportional to the pressure. We can use this relationship to find the new volume. Using the formula:

[tex]\sf:\implies{V1 \times P1 = V2 \times P2}[/tex]

where V1 and P1 are the initial volume and pressure, and V2 and P2 are the final volume and pressure, respectively.

Plugging in the given values, we get:

[tex]\sf:\implies{V2 = V1 \times P1 / P2 = 39.4 mL}[/tex]

[tex]\sf:\implies{39.4 mL \times 741 torr / 862 torr = 34.0 mL}[/tex]

So, the volume of the gas at a pressure of 862 torr is 34.0 mL.

The theory of the atom is credited to John Dalton, an English chemist and meteorologist who lived in the late 18th and early 19th centuries.

He is considered the father of modern atomic theory. Dalton's work laid the foundation for our understanding of the atom and its role in chemical reactions. Dalton proposed that elements are composed of tiny, indivisible particles called atoms, which cannot be created or destroyed in chemical reactions. He also suggested that each element has a unique type of atom and that atoms of the same element are identical in size, mass, and other properties. He further proposed that chemical reactions occur when atoms combine or separate, and that the ratio of atoms in a compound is always the same.

Dalton's theory was based on his extensive studies of the properties of gases and his observations of chemical reactions. He was able to explain the law of multiple proportions, which states that the ratios of the masses of two elements that combine to form a compound are always in a simple whole number ratio.

Learn more about atomic theory:

brainly.com/question/28853813

#SPJ4

The density of hydrogen at 2000°C if it is dissociated into ideal gas  atoms and at a pressure of 1 atm is 5.16 x 10^-5 g/L.

The density of hydrogen at 2000°C if it is dissociated into atoms can be calculated as follows:

First, we need to find the number of moles of hydrogen produced from the dissociation of 1 mol of H2.

H2 → 2H, so 1 mol of H2 produces 2 moles of H.

Next, we need to find the volume occupied by these 2 moles of H at a pressure of 1 atm and temperature of 2000°C. Since hydrogen is an ideal gas, we can use the ideal gas law to find the volume:

PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature in Kelvin.

So, we have:

V = (nRT) / P

V = (2 * 8.31 * (2000 + 273)) / (1)

V = (16.62 * 2373) / 1

V = 38,923 L

Finally, we can calculate the density of hydrogen at 2000°C:

density = mass / volume

density = (2 * 2.01588 g/mol) / (38923 L)

density = 0.0000516 g/L = 5.16 x 10^-5 g/L

Learn more about density here:

https://brainly.com/question/406690

#SPJ4

Energy transformation is the process by which energy is changed from one form to another. For instance, a hydroelectric dam can turn the kinetic energy of moving water into electrical energy.

Energy conservation is the practice of maintaining the overall amount of energy while allowing for its transmission or transformation. For instance, a toaster warms up your bread by converting electrical energy to thermal energy. Electrical energy is converted by a cell phone into electromagnetic energy that is transmitted to other phones. The chemical energy in your diet is converted by your body into the mechanical energy required to move your muscles. To apply several transforms to an object is to mix different transforms into a single transform. This entails utilizing the results of one transformation matrix as the input for another, accumulating the effects of all the matrix transformations.

To learn more about electrical energy click here https://brainly.com/question/863273

#SPJ4