Assuming complete combustion, the stated statement indicates that 24 g of methane were consumed.
What happens during combustion?In the chemical process of burning, an item swiftly combines with oxygen to produce heat. The initial substance and the supply of oxygen are referred to as fuel and oxidizer, respectively. Despite typically being a liquid, fuel for airplane propulsion can also occasionally be a solid, liquid, or gas.
Briefing:
CH4 + 2O₂——————-> CO₂ + 2H₂O
1 mole of methane, or 16 g, will yield =2 x 18 = 36 g of water.
Thus, = 16/36 x 54 = 24 g of methane will be converted into 54 g of water.
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ru3 express your answer in condensed form in order of increasing orbital energy as a string without blank space between orbitals. for example, [he]2s22p2 should be entered as [he]2s^22p^2.
Electronic configuration for Ruthenium is:
[tex]Ru: [Kr]4d^{7}5s^{1}[/tex]
Electronic configuration: A neutral element's total number of electrons is represented by its electronic configuration. To get the total number of electrons in an atom, we sum all the superscripts.
As a result of the electrons being filled in accordance with Afbau's rule in sequence of increasing energies, the electronic configuration in terms of the configuration of noble gases is as follows:
[tex]Ru : [Kr]4d^{7} 5s^{1}[/tex]
Ruthenium is transition element with atomic number 44 and thus the nearest noble gas present is Krypton with 36 electrons.
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In water, a substance that ionizes completely in solution is called a? semiconductor nonelectrolyte weak electrolyte nonconductor strong electrolyte
A Strong Electrolyte in water is a chemical that totally ionizes in solution. An electrolyte that absorbs almost entirely in water is said to be a strong electrolyte.
Strong electrolyte: What is it?A solution or solute that totally, or nearly completely, ionic compounds or decomposes in a solution is referred to as a strong electrolyte. In the solution, these ions act as effective conductors of electric current. A substance that is a good electrical conductor while in aqueous solution was the original definition of a "strong electrolyte."
Which electrolyte is the stronger, weaker?An electrolytes that dissolves almost entirely in water is said to be a strong electrolyte. Hydrogen chloride is a good illustration of the a strong electrolyte (HCl). An electrolyte that just doesn't entirely dissolve in water is referred to as a weak electrolyte.
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select all that apply select all the options that correctly describe the bond angles associated with each electron-domain geometry.
Bond angles also have an effect on the structure of molecules. Bond angles are the angles that connect adjacent lines to form bonds. The bond angle can be used to differentiate between linear, trigonal planar, tetraheral, trigonal-bipyramidal, and octahedral structures.
What is the tetrahedral geometry's electron domain angle?Thus, the molecular structure is bent at an angle just shy of 109.5° and the electron-pair geometry is tetrahedral.
Which five domains are there?The first four domains—Nutrition, Environment, Health, and Behavior—all contribute to our understanding of the animal's diverse experiences, which comprise the fifth domain, the Mental Domain.
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question:-
Select all that apply select all the options that correctly describe the bond angles associated with each electron-domain geometry?
a: The trigonal bipyramidal system has two different bond angles.
b: A species with 3 electron domains will exhibit an ideal bond angle of 120o.
c: A bond angle of 180o is observed for a linear system.
the area where it's most likely that electrons will be detected (bonding and nonbonding). One portion of an electrons domain is represented by a lone pair, singles, doubles, and triple bond.
How many domains of electrons are there?Two categories of electron domains exist: 1) A bound atom, and 2) an electron pair that is not ponding. All bonded atoms count as one electrons domain on the center atom, regardless of whether they are connected by a single, double, or triple bond. There are five fundamental geometries for electron domains.
What is the shape of an electron domain?Geometries of the electron domain. The five shapes that molecules can have in their electron domain geometries are linear, tetrahedral, triangular planar, triangular bipyramidal, and octahedral. Both the geometries and the forms of molecules exhibit many exceptions. They could be twisted, T-shaped, square planar, etc.
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A white salt containing an unknown metal has the formula mcl and gives a lilac flame during a flame test. The salt could be.
The salt could be potassium (K) and the salt will be KCl.
What is a flame test?A flame test is a qualitative test used in chemistry to determine the identity or putative identity of metal or metalloid ions in ionic compounds. When a compound is placed in the flame of a gas burner, it can emit a characteristic color visible to the bare eyes. The combustion test is used to identify the presence of relatively few metal ions in a compound. Not all metal ions give flame color. For Group 1 compounds, a flammability test is usually the easiest way to identify the metal you are using. For other metals, there are other simpler methods that are usually more reliable, but the combustion test can provide useful clues as to where to look. The color will change to yellow.
Potassium burns with a purple or light purple color, also known as lilac flame.
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Determine the work done in l ⋅ atm when a sample of gas expands from 1. 00 l to 2. 50 l against an external pressure of 0. 750 atm.
The work done by the gas to expand is 1.125 Joules.
The work done by the gas in expanding is given by,
W = P(V₂-V₁)
Where,
W is the work done,
P is the pressure,
V₁ is the initial volume,
V₂ is the final volume.
The final volume of the gas is 2.50L and the initial volume is 1 L, while the external pressure is 0.750 atm.
Putting values,
W = 0.750(2.50-1)
W = 1.125 Joules.
The work done by the gas is 1.125 Joules.
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what's the frequency of a microwave thats 6 cm in length
What’s the answer for this question in chemistry
Answer:
All Alkali metals form +1 cations
Noble gases do not form ions
Halogens form -1 anions
Alkaline Earth metals form +2 cations
chalcogens forms -2 anions
how many grams of alcl3 are produced when 355 ml of 1.65 m hcl solution are reacted with excess al according to the reaction?
According to the reaction, when 355 ml of 1.65 m Hydrochloric acid solution are combined with too much aluminum, 26.03 g of aluminum chloride is created.
An inorganic substance with the formula AlCl3 is aluminum chloride, also referred to as aluminum trichloride. It takes the form of [Al(H2O)6] hexahydrate. Aluminum chloride is ALCl3, which is composed of six water molecules. Aqueous hydrochloric acid, also referred to as muriatic acid, is a type of hydrochloric acid. It is a colourless solution with an overpowering odor. Strong acid is how it is categorized.
2 Al(s) + 6 HCl is the given reaction. ———-> 2 AlCl3 + 3H2
Using the provided data
The amount of HCl in moles is n= Volume * Concentration = 0.58575 mol (1.65 M * 355 ml)/1000 ml
based on the response,
It takes 6 mols of HCl. To neutralize 2 moles of aluminum, 0.58575 mol of hydrochloric acid must be used.
using the cross-multiplication method, 0.19525 moles are obtained by multiplying 0.58575% by 2/ 6.
Weight of the AlCl3 = 0.1952 moles * 133.340538 g/mol = 26.03 g
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if he(g) has an average kinetic energy of 4570 j/mol4570 j/mol under certain conditions, what is the root mean square speed of cl2(g) molecules under the same conditions?
The root mean square speed of Cl₂ molecule is 11.34 cm/sec.
Solution
We need to calculate the root mean square speed of Cl₂ molecule.
Average kinetic energy = RT
where,
R = Molar gas constant
T = absolute temperature in Kelvin.
Given,
Average kinetic energy = 4570 J/mol
R= 8.314 J/mol/K
So, T = (4570 × 2)/(3 × 8.314)
⇒ T = 366.45 K
Root mean square velocity = √(3RT/M)
For, Cl₂ molecule,
M = 71 g/mol
T = 366.45 K (as condition is same as previous)
Therefore, Root mean square velocity = 11.34 cm/sec
Hence, Root mean square velocity = 11.34 cm/sec.
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Determine the number of atoms of Nitrogen for each chemical formula
help!
Answer: C0- 1 copper atom, 2 nitrogen, 6 oxygen atoms.
(NH4)3PO4- 12 atoms of hydrogen, three atoms of nitrogen, one atom of phosphorus, and four atoms of oxygen
NH42Cr- 1 molecule of ammonium dichromate,
AlNO3- a-1 n-3 o-9
NH4NO3- n- 2 h-4 o-3
Explanation:
which one of the following is not true concerning diels-alder reactions? multiple choice the reaction is stereospecific. the reaction mechanism has only one step. the reaction mechanism involves a resonance stabilized carbocation. the diene must be a conjugated diene.
The Diels-Alder reaction mechanism involves a resonance stabilized carbocation is not true.
What id Diels-Alder reaction?
A Diels-alder reaction is made up of two components i.e
i - Diene which is made up of two adjacent pi bonds.
ii - dienophile which has atleast one pi bond.
In this Diels-Alder reaction, two sigma bonds and one pi bond are created while three pi bonds are broken every single time.
In Diels-Alder reaction, diene are always conjugated.
The Diels-Alder reaction is always stereospecific which means that both the diene and the dienophile's attached substituents maintain their stereochemistry throughout the reaction.
The Diels-Alder reaction is a concerted reaction which means that it always takes place in one step.
Hence, as all the other options are true we can say that the mechanism involves a resonance stabilized carbocation is not true.
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It is untrue that a resonance stabilised carbocation is involved in the Diels-Alder reaction mechanism.
What id Diels-Alder reaction?
Diels-Alder reactions consist of two parts, namely
two adjacent pi bonds make up the compound I - diene.
Dienophile with at least one pi bond is ii.
Three pi bonds are always broken in this Diels-Alder reaction, but two sigma bonds and one pi bond are always formed.
The dienes used in the Diels-Alder reaction are always conjugated.
The attached substituents to both the diene and the dienophile maintain their stereochemistry throughout the Diels-Alder reaction because it is always stereospecific.
The Diels-Alder reaction always proceeds in a single step because it is a concerted reaction.
We can therefore conclude that the mechanism involving a resonance stabilised carbocation is untrue because all of the other options are true.
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Use the titration curve for the weak acid to calculate the ph of a 0. 150 m solution of that weak acid. Round the pka to the nearest whole number for the calculation, and enter your answer for the ph to two significant figures.
The titration curve reveals the pKa of a weak acid Here, as an example, we have selected acetic acid (CH 3 COOH) as the weak acid and it is titrated against a strong base NaOH.
Explain titration curve.
Titrations are frequently documented on graphs known as titration curves, where the volume of the titrant is typically the independent variable and the pH of the solution is the dependent variable (because it changes depending on the composition of the two solutions).
The graph's equivalence point is where the titrant has completely neutralised the initial solution, which is often an acid (usually a base). It can be calculated precisely by calculating the points of inflection (where the graph changes concavity) and the second derivative of the titration curve, but in most cases, a straightforward visual inspection of the curve will do. In the right-facing curve,
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what quantities can be calculated from the bohr equation for the energy levels of the hydrogen atom? select all that apply.
The Bohr equation for energy levels of the hydrogen atom can be used to calculate the wavelength of a spectral line, to ionize hydrogen atom and to find the energy exchange of the electrons revolving between two levels.
What is Bohr's atomic theory?
In 1913, Neil Bohr presented his atomic theory called 'Bohr's atomic theory'. It was the first model that described the atomic hydrogen spectrum accurately along with wavelength.
Moreover, the theory indicates that the electron move in fixed circular orbits around the nucleus in an atom and there are no chances of electron finding in between the shells. The formula for Bohr's atomic model is l = nh/2π
To put it simply, in an atom, each orbit has its own specific energy and are commonly called energy levels or energy shells.
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Compare and contrast a solution that has a ph less than seven, greater than seven and equal to seven.
The solution having PH less than 7 is slightly acidic, PH equals to 7 is considered to be neutral and the one more than 7 is basic.
What is PH and what is the contrast in the PH of the solution have great PH and low PH?PH is the hydrogen ion concentration in the solution determining the acidity and basicity of the solution.Here the question is asked of the solution that has a PH less than seven, greater than seven and equal to seven.So the solution having PH more than 7 is basic , the solution having PH equals to 7 is considered to be neutral and the solution having PH less than 7 is considered to be acidic.When the PH of the solution is 2 or 3 then the solution is considered to be highly acidic.When the PH of the solution is exactly and precisely 7 then the solution is neutral.To know more about PH visit:
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Potassium hydrogen phthalate, khp, is used as a primary standard for determining the concentration of a solution of naoh by titration. If the khp has not been dried before weighing, the calculated molarity of the naoh would be.
If the KHP was not dried before weighing, the calculated NaOH molarity would be higher than the actual value because the apparent mass of KHP includes water.
What is KHP ?KHP is potassium hydrogen phthalate. Stable in air and easy to weigh, it is commonly used as a primary standard in pure form for sodium hydroxide titration.However, if the KHP is not dry enough, the calculated KHP molarity will be higher than the actual value because the mass of water is included as part of the KHP mass.Again, the molar ratio of reaction between KHP and NaOH is 1:1. Therefore, if the molar concentration of KHP is higher than the actual value, the molar concentration of NaOH is also higher than the actual value.To know more about potassium hydrogen phthalate visit:
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How do you know if a new substance is formed in a chemical equation?
The indication written identify the new substance is formed in a chemical reaction.
A chemical reaction happens when substances break down or combine to form a one or more new substances. the substance take part in a chemical reaction initially called as reactants and the substance forms at the end of the chemical reaction is called as products.
The sign or indications of new substance is formed are:
formation of ppt change in colorevolution of gasformation of bubbleschange in properties change in odorThe phase change is not consider as the chemical change.
Thus, The indication written identify the new substance is formed in a chemical reaction.
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What is the weighted average of a nail in the sample data given?
The weighted average of the nail in accordance with the given data is 11.176g.
How to calculate weighted average?Weighted average is an arithmetic mean of values biased according to agreed weightings.
The weighted average of the nail in the image above can be calculated by multiplying the decimal abundance with the mass of the nail, then summed up as follows;
Weighted average = (decimal abundance × mass 1) + (decimal abundance × mass 2)
Weighted average = (0.12 × 3.3) + (0.88 × 12.25)
Weighted average = 0.396 + 10.78
Weighted average = 11.176g
Therefore, 11.176g is the weighted average of the nail
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does adding boiled, deionized water to the titrating flask to wash the wall of the erlenmeyer flask and the buret tip increase, decrease, or have no effect on the ksp value of the ca(oh)2? explain.
Addition of boiled, deionized water to the titrating flask to wash the wall of the erlenmeyer flask and the buret tip will have no effect on the Ksp value of ca(oh)2.
There will be no effect on the Ksp value as boiled deionised water is not able to alter the number of hydronium and hydroxide ions. As no change in the ions happen so there will be no change in Ksp value. The equilibrium constant for a solid material dissolving in an aqueous solution is the solubility product constant, Ksp. It stands for the degree of solute dissolution in solution. A substance's Ksp value increases with how soluble it is.
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Fill in the coefficients that will balance the following reaction: KI + Pb(NO3)2 → PbI2 + KNO3
Answer:
2KI + Pb(NO3)2 = PbI2 + 2KNO3
Explanation:
To make a chemical equation to be balanced,two things would be a factor:
1.The same radicals on both side of equation.
2.The radical on only one side of equation.
Since the equation has radicals on both side,we count it as one unit.Then balance the most complex,Pb(NO3)2 and KNO3 in this case,and the least complex on the last.
I know thst it is really hard at first to solve it but follow the instuction carefully.
Please rate it,Thanks.
Which set of items listed can be arranged to transform chemical energy into mechanical energy?.
The set of items listed which can transform the chemical energy into the mechanical energy is the battery, wire, fan blades turning.
The chemical energy of the item is transformed into the mechanical energy by the arrangement of batteries, wire, and fan blades turning. In the wire, the movement of ion is observed, which causes the movement of fan blades. And this turning of fan blades convert chemical energy to mechanical energy.
In the engine combustion, chemical energy is first converted to heat energy, which causes the expansion of a fluid into a motion. In the contrast, motor proteins convert chemical energy in the molecule to the useful mechanical work.
Therefore, the set of items listed which can transform the chemical energy into the mechanical energy is the battery, wire, fan blades turning. Hence, option c is correct.
Your question is incomplete. The complete question is
Which set of items listed can be arranged to transform chemical energy into mechanical energy?
A. motor, fan blades turning, wire
B. magnet, wire, fan blades turning
C. battery, wire, fan blades turning
D. battery, magnet, heat
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Select the correct answer. which of these actions is an example of chemical weathering? a. freezing water widens the cracks in rocks. b. plant roots force their way into cracks in rocks and break them. c. oxygen in air reacts with iron content in rocks, causing them to change color. d. strong winds peel soft rock away, leaving harder rock behind.
Which of these actions is an example of chemical weathering?
a. freezing water widens the cracks in rocks.
b. plant roots force their way into cracks in rocks and break them.
c. oxygen in air reacts with iron content in rocks, causing them to change color.
d. strong winds peel soft rock away, leaving harder rock behind.
what is the moment of inertia ia of particle a? what is the moment of inertia of particle a? mr2 9mr2 10mr2 undefined: an axis of rotation has not been specified.
The moment of inertia of a particle is mr²
Moment of inertia is a quantitative measure of the rotational inertia of a body in physics - i.e. The resistance that a body exhibits to changing its rotational speed about its axis by the application of torque (torque). Axes can be internal or external and can be fixed or unfixed.
In general, the moment of inertia of a uniform body is calculated as the product of the square of the distance (r²) from the axis of rotation and its mass. The flywheel is a heavy mass attached to the engine's crankshaft is one example of the moment of inertia
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Can someone please help me with question 4&5 please
The pH of the solution is obtained is basic pH, hence the solution is a base and it will change the color of Bromocresol from yellow to blue. Phenolphthalein is colorless in neutral and acidic solution but it gives basic pink color in basic solution.
What is pH?pH of a solution is the measure of the H+ ion concentration. Mathematically it is negative logarithm of H+ ion or hydronium ion concentration. It measures how acidic or basic the solution is.
The pH of the solution is obtained as 12.2 and hence the solution is basic since pH above 7 is basic solutions. Bromocresol blue shows the color change from yellow to blue in the pH range of 3 - 5.4. Hence above a pH of 5.4 it shows blue color.
Phenolphthalein shows a color change from 8 - 9.5 pH range from colorless to pink. Hence, it gives pink color for the given solution.
Let AOH be the solution and when it dissociates in water it gives OH- ions as per the Arrhenius theory. Based on this theory we cannot say that it is monoprotic or diprotic ,however it flourish all the OH- ions to water.
[tex]\rm AOH \rightarrow A^{+} +OH^{-}[/tex]
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Calculate the number of moles in 12.50 g of benzene C2H5OH.
The number of moles of Benzyl alcohol is 0.115 moles.
Number of moles can be also told in terms of Avogadro's number with is 6.023 × [tex]10^{23}[/tex]. It can be calculated for atoms, molecules, ions or others as well. The mole is a convenient unit to use because of the great number of atoms, molecules, or others in any substance. The concept of the mole helps to put quantitative information about what happens in a chemical equation on a macroscopic level. So it is used widely.
Molecular mass is nothing but the sum of atomic mass of all the element present in the molecule. In the above given question we have to calculate the number of moles of the molecule by using the given weight. To do so we use the below formula;
Number of moles = given weight
Molecular mass
⇒ 12.50 = 0.115 moles
108.14
Therefore the number of moles in 12.50 g of benzene C2H5OH is 0.115 moles
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How do you make chocolate not melt on your hands?.
The steps to make chocolate so that it does not melt on my hands are: heat the chocolate up to 120 degree fahrenheit and then after removing the bowl cool down it below 80 degree fahrenheit.
The main reasons to temper chocolate are:
1. Tempered chocolate is firm and solid in nature at room temperature. This is critical when making the chocolate confections or decorations. Chocolate which is out of temper requires refrigeration to maintain its shape.
2. The appearance of tempered chocolate is much better than that of its un-tempered counterpart. Tempered chocolate is smooth in nature , shiny and evenly colored.
3. Chocolate that is not been tempered has a distinctly dull appearance and may develop fat bloom -- grayish-white spots on the surface of the chocolate where unstable beta crystals have gathered.
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12. What is the internationally accepted system for measurement called? Imperial System of Measurement National System of Units O International System of Units (SI) U.S. Customary System of Measurement
Internationally accepted system for measurement called as international system of units (SI)
The international system of unit (SI) is commonly known as the metric system and is the international standard for measurement and the international treaty of the meter was signed in Paris on may 20 1875 by seventeen countries including the united states and is now celebrated around the globe as world metrology day and long the dominant measurement system used in science
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which of the elements listed below has the highest first ionization energy? question 9 options: he ne ar kr xe
The largest initial ionization energy belongs to Helium. It is the first member of the noble gas group in the periodic table and is a colorless, odorless, tasteless, inert, monatomic gas.
Where can one find helium?Helium is used as a coolant in nuclear reactors, in compressed air tanks, and in lasers. Of all the elements, Helium has the lowest melting and boiling points.
What purpose serves helium?A typical carrier gas for gas chromatography is Helium. It can be used to determine the age of rocks and minerals that contain uranium and thorium.
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Which statement describes the particles that make up a raindrop?
Question 3 options:
They stay close together and vibrate in place.
They are far apart and move freely from one place to another.
They stay close together and slip past one another.
They are far apart and bounce off one another.
The statement that describes the intermolecular forces in the raindrop is that; they stay close together and slip past one another.
What are intermolecular forces?The term intermolecular forces has to do with the kind of force that holds the molecules of a substance together. There are several kinds of intermolecular forces and the strength of the bond depends on the kind of the interaction that goes on.
In this case, we have a rain drop. We have to know that the rain drops are liquids and the intermolecular forces in liquids is such that the molecules are able to slide past each other.
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how does the second law of thermodynamics explain the diffusion of substances? (explain why particles are more likely to move from high to lower concentration using entropy in your answer.)
The second law of thermodynamics explain the diffusion of substances is that trend of randomization. Diffusion of particles of solute from higher concentration to lower concentration lead to increase in entropy.
The second law of thermodynamics explain the trend of randomization or an increasing in entropy. if the concentration of substances on both sides are same then the distribution is random is more than the concentration is unequal. Diffusion of as substance from higher to lower leads to increase in entropy ,. when the concentration decreases entropy increases.
Thus, The second law of thermodynamics explain the diffusion of substances is that trend of randomization. Diffusion of particles of solute from higher concentration to lower concentration lead to increase in entropy.
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do xe gas atoms experience attractions to each other? if so, how do these attractions compare to the attractions between kr atoms.
Xe gas atoms do experience attraction to each other, that is called a London dispersion forces. Compared to Kr gas atoms, Xe has stronger London dispersion forces, thus Xe is more difficult to boil.
What is London dispersion force?London dispersion force is an intermolecular force, the weakest force that is only temporarily active when the electrons in two adjacent atoms occupy positions that make the atoms form temporary dipoles. London dispersion forces strength is very dependent on the molecular weight. Xe has heavier molecules than Kr, so Xe also has stronger London dispersion forces. As a result, Xe is more difficult to boil than Kr.
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