What happens in a collision if both objects are moving?? And What happens in a collision if only one object is moving?? 50 pointssss

72.8 x 10²³ electrons each sphere contain.

m = mass of each aluminium sphere = 0.0250 kg = 0.0250 x 1000 g 25g

M = atomic mass = 26.982 g/mol

n = number of moles

Number of moles is given as

n = m/M

n = 25/26.982

n = 0.93

N₀ = Avogadro's number = 6.023 x 10²³

N = number of atoms

Number of atoms is given as

N = n N₀

N = (0.93) (6.023 x 10²³) = 5.6 x 10²³ atoms

= number of electrons per atom = 13

= total number of electrons

Total number of electrons are given as

=  N

= (13) (5.6 x 10²³)

 = 72.8 x 10²³ electrons

The mass of an electron is roughly 1/2000 that of a neutron or proton, and it has an electric charge of 1. The letter e is typically used to represent electron charge. It is a fundamental physical constant that is used to express the 1.602 10-19 coulomb, which is the unit of naturally occurring electric charge.

Negative charge characterizes electrons. Proton and electron charges have exactly the same size but in the opposite direction. There is no charge on a neutron. Protons and electrons are drawn to one another because their charges are in opposition.

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Under very low temperature or high pressure the gases behave the most ideally.

A theoretical gas known as an ideal gas is made up of several randomly moving point particles with no interparticle interactions. [1] Because it abides by the ideal gas law, a condensed equation of state, and is amenable to statistical mechanics analysis, the ideal gas concept is helpful. If, for instance, the interaction is totally elastic or is thought of as point-like collisions, the constraint of zero interaction can frequently be disregarded.

Many real gases behave qualitatively like an ideal gas under various temperature and pressure settings, where the gas molecules (or atoms for monatomic gases) take on the function of the ideal particles.

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The correct statement about an exothermic reaction carried out in a coffee-cup calorimeter is that the enthalpy of the products is lower than that of the reactants. Therefore, the correct answer is option B.

Exothermic reaction is a term that means the heat will be released during the reaction, making the environment warmer. In a coffee-cup calorimeter, the heat increases the temperature of coffee contents, which includes water.

In an exothermic reaction, the enthalpy of the product will be lower than that of reactants (B is correct).

During the reaction, heat is released so the water temperature will increase (C and E are incorrect).

Since the enthalpy of the product is lower, the enthalpy change will be negative (D is incorrect).

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The half-life of a radioisotope is 8 hours if 60 g of such a radioactive substance spontaneously degrades to 15 g after 16 hours.

Uranium is the most well-known illustration of a naturally occurring radioisotope. The only other form of naturally occurring uranium , uranium, which has three less electrons in its atom and is less permanent or radioactive, makes up the remaining 0.7%.

Utilized in investigations on the survival of red blood cells. used to sterilize medical equipment and to increase the dependability and safety of commercial fuel oil burners. used in radiography, food radiation, gauges, and treatment for cancer.

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The mass of barium sulfide that participates is 118.57grams.

Barium sulfate is available as a powder to be dissolved in water, a liquid suspension, a paste, and a tablet. The paste and tablet are taken orally, while the powder and water mixture, suspension, and enema (liquid instilled into the rectum) are all administered.

Avogadro's law states that 1 mole of each substance contains 6.023×10²³ Avogadro's number of particles and takes up 22.4 L at STP.

The following equation is used to determine the moles:

Number of moles = given mass/molar mass

Moles of  BaSO₄ = 0.700moles

Molar mass of BaSO₄= 169.39 g/mol

Mass = 0.7×169.39

Mass = 118.57grams.

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to determine the mass number of the daughter product after alpha decay has taken place Subtraction of 4 from the parent element yields the mass of the daughter product. Subtraction of 2 from the parent atom yields the atomic number of the daughter product.

Assume X is a parent element with atomic number Z and mass number A; if X decays, we obtain a daughter element Y with atomic number Z1 and mass number A1, as well as an alpha particle with atomic mass 2 and mass number 4. An alpha particle is a doubly ionised Helium atom with atomic number 2 and mass number 4.

Alpha degeneration

X4 → YA¹ + He.

The mass numbers and atomic numbers of a reaction must be balanced on either side of the equation.

→ A=A1+4

Z = Z1+2

As a result, A1 = A-4 and Z1 = Z-2.

As a result, subtracting 4 from the parent element yields the mass of the daughter product.

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An sp2 hybrid orbital from the carbon-1 and the same from the oxygen-1 atoms combine to form the sigma bond between them.

The bond angle is approximately 120°.

The carbon-1 atom is the carbon attached to the two oxygens and the other carbon of the methyl functional group. The oxygen-1 is the carbonyl oxygen that has a double bond to carbon-1. This double bond is made up of one sigma bond and on pi bond. In order for the carbon to be attached to three atoms and be stable requires sp2 hybridization to form single bonds to the three attached atoms leaving one p-orbital available to make the pi-bond part of the double bond. Oxygen also is sp2 hybridized with the other two hybrid orbitals occupied by two pairs of nonbonding electrons. The molecular geometry associated with sp2 hybridization is trigonal planar which is flat triangular in shape with carbon-1 being in the middle. The bond angle formed between carbon-2/carbon-1/oxygen-1 will be 120° as will be the angles between carbon-2/carbon-1/oxygen-2 and oxygen-1/carbon-1/oxygen-2.

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An example of supplying activation energy to a chemical reaction is striking a match to make it burn. A match's combustion is a highly exothermic energy process.

Energy-releasing processes are said to be positive since the chemical reactions end products are in a more stable and advantageous condition afterward. It's because the reactions follow a predetermined course, and that course necessitates the use of energy (known as activation energy) in order to create an activated complex chemical reaction, which will ultimately result in the synthesis of the products. This implies that in order to begin, the products must absorb some energy (the activation energy).

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The acronym S N2 stands for substitution, nucleophilic, and bimolecular, indicating that the rate-determining step involves two molecules. S stands for substitution, N for nucleophilic, and the number two stands for bimolecular.

The solvent in which an SN2 reaction occurs has a sizable impact on the reaction's rate. Protic solvents (those capable of donating hydrogen bonds, like water or alcohol) are used to reduce the power of the nucleophile through vigorous solvation.

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The vapors pressure of water at 25°c is 23.76 mm hg is 23.51 mmHg.

Moles of  the sucrose is mass/molar mass

= 50.0/342.3 = 0.1461 mol

Moles of water = mass/molar mass

= 250/18.02 = 13.87 mol

Mole fraction of water = moles of water/(moles of water + moles of sucrose)

= 13.87/(13.87 + 0.1461) = 0.9896

Vapor pressure of solution = mole fraction of water x vapor pressure of water

= 0.9896 x 23.76 = 23.51 mmHg

In chemistry, a solution is a special type of homogeneous mixture composed of two or greater materials. In this sort of mixture, a solute is a substance dissolved in another substance, called a solvent.

The solution is a homogeneous aggregate of 1 or extra solutes dissolved in a solvent. solvent: the substance in which a solute dissolves to supply a homogeneous aggregate.

The constituent debris of a solution is smaller than 10-9 meters in diameter. Constituent particles of a solution can not be visible to the eye. solutions do no longer scatter a beam of mild passing through it.

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The increase in energy when tetrahedral bond angles deviate from the optimum angle of 109.5 degree is known as angle strain.

In cycloalkanes, the carbon atoms are sp3 hybridized, which would imply an ideal tetrahedral bond angle of 109.5 degree whenever possible. cycloalkanes look like shapes such as a triangle, square, tetrahedral. all the rings are in a flat or planar shape. Bayer Theory suggests that the difference between the ideal bond angle (which is 109.5° for sp3 carbon) and the angle in the planer cycloalkane causes the strain, which is called angle strain. According to the Bayer Theory, cyclopentane would be the most stable because its bond angle, 108°, is closest to the ideal angle of 109.5°. Cyclopropane would be the least stable one since it has the largest angle deviation of 49.5° (60° vs 109.5°). It was also predicted that cyclohexane would be less stable than cyclopentane because of the larger angle deviation (10.5° deviation for cyclohexane vs 1.5° for cyclopentane), and as the number of sides in the cycloalkanes increases beyond six, the stability decreases.

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0.0014 atm is the pressure of nitrogen at 20 °C and 730 mm Hg initial pressure when its volume increases from 875 ml to 955 ml

Since the mass of the gas is maintained during the change in volume, the number of moles with the initial volume must first be calculated.

To calculate the moles of gas, the ideal gas equation is used:

PV = nrt

where

P = Pressure

V=Volume

n = moles

T = temperature

R = gas constant

It is cleared n:

n = PV/Rt

n = PV/Rt

Data

P = 730 mmHg = 0.96 atm

V = 875ml = 0.875L

n = ?

T = 20°C = 293.15K

R = 0.082 L atm/mol °K

n = PV/Rt

n = 0.96. 0.875 / 0.082. 293.15

n = 0.84 / 24.03

n = 0.035 moles

Knowing the moles of nitrogen, the new pressure of the gas is calculated after changing its volume.

Data

P = ?

V = 955ml = 0.955L

n = 0.035 moles

T = 20°C = 293.15K

R = 0.082 L atm/mol °K

P = nRt/V

P = 0.035. 0.955 / 0.082. 293.15

P = 0.033 / 24.03

P = 0.0014 atm

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Chlorine contains a total of 17 electrons which are filled in different orbitals of which 7 electrons are located in the outermost energy level or orbital.

The orbital, or fixed routes or energy levels, used by the electrons to surround the nucleus in an atom are known as orbitals. Electrons are filled in ascending energy level order. Lower energy levels fill up first as a result. The final electrons, known as valence electrons, are filled in the outermost energy levels. There is a set number of electrons that can fit in each shell. Chlorine is the seventeenth element on the periodic table and possesses 17 electrons, seven of which are in the outermost shell.

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Answer:

1.93 molar, or M

Explanation:

By definition, molarity is defined as moles/liter.  A 0.5 molar (or M) solution will have 0.5 moles of solute per 1.0 liter.  To answer this question, first calculate how many moles of NaOH there are in 11.6 grams of the compound.  We'll need the miolar mass of NaOH, which is 40 grams/mole.  This is found by adding the atomic masses of each atom in the compound:

Na:     23

O:      16

H:         1

Total: 40 g/mole

The moles of NaOH is found by dividing the mass by the molar mass:

        (11.6 grams NaOH)/(40 g/mole NaOH) = 0.29 moles NaOH

0.29 moles NaOH is contained in 15cm^3 of solution.  Convert 15cm^3 into liters (L):

 (15 cm^3)*(1 ml/cm^3)*(1 liter/1000 ml) = 0.015 liters

cm^3 and ml both cancel with these conversion factors, leaving only liters, L.

The solution consists of 0.29 moles of NaOH in 0.15L.  It's concentration is therefore:

  (0.29 moles)/(0.015L) = 1.93 molar, or M

As can be seen from the structures of camphor and borreol, camphor has a ketone group while borreol has groups with alcohols activities. Through hydrogen bonding, the melting point of the boreal is higher.

Alcohols' melting point and boiling points are always thinner than those of ketones. the light of the intermolecular hydrogen bond. hence, the melting point. in the boreal is higher. Waxy, combustible, and translucent solid, camphor has a potent scent. It has the terpenoid compound C10H16O in its chemical makeup. The big East Asian evergreen tree known as the camphor laurel (Cinnamomum camphora) is where you can find it. The compounds with the general formula R-OH, where R is an alkyl or a substituted alkyl group, are known as alcohols. Alcohols are hence alkane derivatives in which one or more H.

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The calculated mass shows that the given mass is oxygen.

calculation:-

P=m/v by  arranging  the  equation  we  get

R =0.082atm/mol/k

Mm=pRT/P = [(1.10  x10^-6 x1000g/l) xo.082  

atm/mol/k x(80+273] /(1.00  x10^-3) = 31.84  to the nearest ten is 32.

The ideal gas density depends on the molecular weight temperature and pressure of the system. Density is an important parameter in heat and mass transfer calculations. It is also used to derive many important dimensionless numbers such as the Reynolds number and the Peclet number.

Real gases approach ideal gas behavior at relatively low densities low pressures, and high temperatures. At high temperatures, the gas molecules have enough kinetic energy to overcome the intermolecular forces, but at low temperatures, the gas has less kinetic energy, so the intermolecular forces are more pronounced.

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In the video, the semipermeable membrane separates the two solutions of different concentrations.

B. The solvent can ideally move in both directions through the semipermeable membrane.

D. The movement of the solvent particles from the concentrated solution to the dilute solution is known as reverse osmosis.

Examples of solvents Water, ethanol, methanol, and acetone are a few typical examples of solvents. A substance that can dissolve a certain solute and combine with it to produce a solution is referred to as a "solvent."

Osmosis is the movement of a solvent through a semipermeable membrane to separate two solutions with different solute concentrations. Osmosis is the process by which a solvent is transferred from a solution with a lower solute concentration to one with a greater solute concentration.

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The coefficient of  in the balanced equation is 8 and coefficient of fe3+  is 5.

What is balance reaction?

balance reaction is a equation where the numbers of atom of each type in the reaction is the same on both reactance and product sides.

To balance a redox reaction in the acidic medium, the number of atoms of all the elements involved in the reaction must be equal for substrates and product.

The reaction given as-

Fe2+MnO4+------>Fe3+ +Mn3+

The change in the oxidation number of the elements on reaction is seen.

Fe changes its oxidation state from +2  +3, change is +1

The oxidation state of Mn changes from +7  +2, change is -5

There is required 5 atoms of Fe for 1 atom of Mn.

With this, the equation can be written as:

The reaction is further balanced with H and O, with formation of .

The coefficient in front of  is 8 and that of  is 5.

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Heat absorbed by water is calculated as follows: 34.3 g x 5.4 oC x 1.00 calorie/g oC = 185.22 cal ( 0.18522 Kcals) Kcal/gram of potato chips = 0.18522/2.4 g, or 0.077 Kcal/g, is the unit of measurement for the caloric content of potato chips.

The self-repellent fluid known as caloric, which moves from hotter to colder bodies, is the basis of the debunked scientific hypothesis known as the caloric theory of heat. In addition, it was believed that caloric could enter and exit liquids and solids by way of their pores.

Supplement. Foods abundant in protein, carbohydrate, fat, vitamins, and minerals make up the high-calorie diet kind of diet. There might be between 4,000 and 5,000 calories consumed daily on this kind of diet.

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By adding missing bonds, charges, nonbonding electrons, and curved arrows, the mechanism for the given reaction is depicted in the attached image.

Mechanism of Organic Reaction An organic reaction mechanism is typically represented by the overall reaction type (which can be substitution, addition, elimination, oxidation, reduction, or rearrangement), the presence of any reactive intermediates, the nature of the initiating reagent, the presence of any catalysis facilitated by a catalyst, and, finally, its stereochemistry.

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Marie Anne Lavoisier realized how crucial it was to create drawings of the tools she and her husband employed in their research. In order to impart knowledge, this is crucial.

It is widely acknowledged that Lavoisier's major contributions to chemistry came mostly from his transformation of the field from a qualitative to a quantitative one. The discovery of the function of oxygen in combustion is what made Lavoisier famous. He challenged the phlogiston idea and identified and called the elements oxygen and hydrogen (1778). Lavoisier contributed to the development of the metric system, created the first comprehensive list of elements, and reformed chemical nomenclature. In addition to discovering that matter's mass never changes despite its form or shape, he also anticipated the creation of silicon in 1787. Lavoisier served as the general manager of the Ferme and was a key member of several aristocratic councils

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Answer:

A. Gmir ZuXAXB + RT (XA lnXA + XB ln Xp) Where W = WAB (WAA + WBB) and Z = the coordination number of each atom in the crystal.

Explanation:

Free enthalpy is another name for Gibbs's free energy. The energy associated with a chemical reaction needed to carry out work is known as Gibbs-free energy.

The formula: can be used to compute Gibbs free energy.

ΔG=ΔH-TΔS.

The difference between the reaction's enthalpy and its product of changing temperature and entropy yields the Gibbs free energy.

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52.18mL of KOH should be added to 100 mL of solution containing 10.0 g of histidine hydrochloride to get a pH of 9.30.

What is pH?

pH is a measurement of the acidity or basicity of aqueous or other liquid solutions in terms of digits. The phrase, which is frequently used in chemistry, biology, and agronomy, converts hydrogen ion concentrations, which typically vary between 1 and 1014 gram-equivalents per liter, into numbers between 0 and 14.

Given:

pH = 9.30

pH = -log [[tex]H^{+}[/tex]]

9.30 = -log [[tex]H^{+}[/tex]]

antilog (-9.30) = [[tex]H^{+}[/tex]]

[[tex]H^{+}[/tex]] = 5.01 × [tex]10^{-10}[/tex] M

Strong acid (His HCl) + strong base (KOH)

[[tex]H^{+}[/tex]] = [tex]\frac{-M_{B}V_{B}n_{fB} + M_{A}V_{A}n_{fA}}{V_{final}}[/tex]

[tex]M_{B}[/tex] and [tex]M_{A}[/tex]= Molarity

[tex]V_{A}[/tex] and [tex]V_{B}[/tex] = Volume

[tex]n_{fA}[/tex] = n factor for acid

[tex]n_{fB}[/tex] = n factor for KOH

5.01 × [tex]10^{-10}[/tex] M = [tex]\frac{-1 M X V_{B} X 1 + 0.52 X 100 X 1 }{V_{A} + V_{B} }[/tex]

                       = [tex]\frac{-V_{B} + 52.18 }{100 + V_{B} }[/tex]

[tex]n_{fB}[/tex] = [tex]n_{fn}[/tex] = 1

5.01 × [tex]10^{-10}[/tex] M (100 + [tex]V_{B}[/tex] )= [tex]V_{B} - 52.18[/tex]

5.01 × [tex]10^{-10}[/tex] + 5.01 × [tex]10^{-10}[/tex] [tex]V_{B}[/tex] = -[tex]V_{B}[/tex] + 52.18

2.18 - 5.01 × [tex]10^{-8}[/tex] = 5.01 × [tex]10^{-10}[/tex] [tex]V_{B}[/tex] + [tex]V_{B}[/tex]

[tex]V_{B}[/tex] = 52.17999 mL ≅ 52.18mL of KOH.

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Water is a daily necessity for human survival. We might be able to go a week without eating, but we couldn't last even three days without drinking. In addition, 70% of our bodies are made of water.

Evaporation is the process through which surface water from lakes, rivers, and oceans turns into water vapor and travels into the atmosphere with a little help from solar energy.

Through the process of transpiration, which involves the evaporation of water from plants largely through the pores in their leaves, plants lose liters of water each day.

The inert form of nitrogen gas is deposited into soils during the nitrogen fixation process from the atmosphere and surface waters, primarily through precipitation.

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The amount of zinc produced is 10.83 g.

given that :

current , I = 11.7 A

time , t = 45.6 min = 2736 sec

the expression is given as :

W = ZIt

W = amount of the substance deposited

I = current in ampere = 11.7 A

t = time in sec  = 2736 sec

Z = M / nF

where,

M = molecular mass = 65.3 g/mol

n = no. of electrons = 2

F = faraday constant = 96500 C

W = (65.3 / 2 × 96500 ) 11.7 × 2736

W = 10.83 g

Thus, when molten zinc chloride (zncl2) is electrolyzed, zinc is deposited at the cathode.  the amount of zinc produced if a current of 11.7 a is passed through the electrolytic cell for 45.6 min is 10.83 g.

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the balanced nuclear equation for the overall decay of cobalt-60 resulting in beta and gamma emission after the two-step process. is the chemical equation of 60_27Co->60_28Ni+0_-1e+0_Oy

Chemical equations are symbols and chemical formulas that depict a chemical reaction symbolically. With a plus sign separating the entities in both the reactants and the products and an arrow pointing in the direction of the products to indicate the direction of the reaction, the reactant entities are given on the left and the product entities on the right. Chemical formulas can be mixed, structural (represented by pictures), or both. The absolute values of the stoichiometric numbers are shown as coefficients next to the symbols and formulas of the various entities. Jean Beguin drew the first chemical equation in 1615.

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A 25.0 ml sample of 0.105 m HCl was titrated with 31.5 ml of NaOH. the concentration of the NaOH is 0.0833 M.

given that :

molarity of HCl, M1 = 0.105 M

volume of HCl V1 = 25 mL

Molarity of NaOH M2 = ?

volume of NaOHV2  = 31.5 mL

by using the titration equation we get :

molarity of HCl × volume of HCl = molarity of NaOH × volume of NaOH

M1 V1 = M2 V2

M2 = (M1 V1 ) / V2

M2 = ( 0.105 × 25 ) / 31.5

M2 = 0.0833 M

The concentration of NaOH = 0.0833 M.

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The formula unit when barium perchlorate reacts with sodium sulfate to produce sodium perchlorate and barium sulfate would be: [tex]Ba(ClO_4)_2 (aq) + Na_2SO_4 (aq) -- > 2NaClO_4 (aq) + BaSO_4 (s)[/tex]

The reaction between barium perchlorate and sodium sulfate to produce sodium perchlorate and barium sulfate is a double decomposition reaction whose chemical equation can be derived as follows:

Formula for sodium sulfate = [tex]Na_2SO_4[/tex]

Formula for barium perchlorate = [tex]Ba(ClO_4)_2[/tex]

Formula for sodium perchlorate = [tex]NaClO_4[/tex]

Formula for barium sulfate = [tex]BaSO_4[/tex]

Since barium sulfate is insoluble, the chemical equation for the reaction would be:

[tex]Ba(ClO_4)_2 (aq) + Na_2SO_4 (aq) -- > 2NaClO_4 (aq) + BaSO_4 (s)[/tex]

In other words, a double decomposition reaction can also be a precipitation reaction in which two aqueous salts exchange radicals to produce one aqueous and one insoluble salt.

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Answer:

6.91 moles cesium xenon heptafluoride

Explanation:

The balanced equation

            CsF + XeF6 = CsXeF7

tells us that we should expect 1 mole of cesium xenonheptafluoride (CsXeF7) for every 1 mole of cesium fluoride consumed, a molar ratio of 1:1.  It also says we will use 1 mole of xenon hexafluoride, XeF6, for each mole of cesium fluoride.

The 6.91 moles of CsF will therefore require 6.91 moles of XeF6 to completely react.  We are in luck, since there are 8.23 moles of XeF6, more than enough to react with all the CsF.  In fact, there should be (8.23 moles - 6.91 moles =) 1.32 moles of XeF6 left over, unreacted.  CsF is the "limiting reagent:"  the reaction will stop once it is consumed.  We can assume that all of the CsF will react, so that will result in the same number of moles of CsXeF7 produced, since the molar ratio of the two is 1:1 reactant/product.