Rubidium iodide has a lattice energy of -617 kJ/mol, while potassium bromide has a lattice energy of -671 kJ/mol. Why is the lattice energy of potassium bromide more exothermic than the lattice energy of rubidium iodide?
a) Rubidium and iodide have greater charge than potassium and bromide
b) potassium and bromide have greater charge than rubidium and iodide
c) rubidium and iodide are smaller than potassium and bromide
d)potassium and bromide are smaller than rubidium and iodide.
c)Rubidium and iodide have electrons in the 5th energy level whereas potassium and bromide have electrons in the 4th energy level.

statement correctly describes the electronic charge distribution in a molecule-Option 2 The electronic charge is distributed equally around each atom in the molecule.

When charged matter is positioned in an electromagnetic field, it encounters a force due to its physical property of electrical charges. A positive or negative electric charge can exist (commonly carried by protons and electrons respectively). Like charges repel each other and, while unlike goods become more expensive one another. Coulomb, unit of electrical charges in the m long system, which serves as the foundation for the SI physical unit. C is the abbreviation. The coulomb is defined as the amount of electricity transferred in one second by a one-ampere current. Charge (exhibited by protons) and negative charge are indeed the two types of charge (exhibited by electrons.

To learn more about charge here:

https://brainly.com/question/3412043

#SPJ4

Answer:

roh = 1.6x\(10^{-3}\)

Explanation:

The density (g/mL) of a rectangular bar that has a mass of 186.77 g and measures 4.26 cm in length, 1.42 cm in width, and 19.21 cm in height is 1.61g/mL.

The density of a substance can be calculated by dividing the mass of the substance by its volume.

According to this question, a rectangular bar measures 4.26 cm in length, 1.42 cm in width, and 19.21 cm in height.

Volume of rectangular bar = Length × width × height

= 4.26 × 1.42 × 19.21

= 116.21cm³

Density of the bar = 186.77g ÷ 116.21mL

Density of the bar = 1.61g/mL

Therefore, the density (g/mL) of a rectangular bar that has a mass of 186.77 g and measures 4.26 cm in length, 1.42 cm in width, and 19.21 cm in height is 1.61g/mL.

Learn more about density at: https://brainly.com/question/15164682

#SPJ2

First, we need to write out the balanced chemical equation for the reaction: 4 KO2 + 2 CO2 → 2 K2CO3 + 3 O2

From the equation, we can see that 4 moles of KO2 react with 2 moles of CO2 to produce 3 moles of O2. Therefore, we need to convert the given masses of KO2 and CO2 into moles:

moles of KO2 = 2.61 g / molar mass of KO2 = 2.61 g / 71.10 g/mol = 0.0367 mol
moles of CO2 = 4.46 g / molar mass of CO2 = 4.46 g / 44.01 g/mol = 0.1013 mol

Next, we need to determine the limiting reagent (the reactant that will be completely consumed in the reaction) by comparing the mole ratios of KO2 and CO2 in the balanced equation. The ratio of moles of KO2 to moles of CO2 is:
0.0367 mol KO2 / 4 mol KO2 per 2 mol CO2 = 0.0184 mol CO2

Since this ratio is less than the actual number of moles of CO2 we have (0.1013 mol), CO2 is in excess and KO2 is the limiting reagent.

Using the mole ratio from the balanced equation, we can calculate the number of moles of O2 produced:

moles of O2 = 3 mol O2 per 4 mol KO2 × 0.0367 mol KO2 = 0.0275 mol O2

Finally, we can convert the moles of O2 to grams:

mass of O2 = moles of O2 × molar mass of O2 = 0.0275 mol × 32.00 g/mol = 0.88 g
Therefore, 2.61 g of KO2 and 4.46 g of CO2 would produce 0.88 g of O2.

For more questions on: chemical

https://brainly.com/question/29886197

#SPJ11

Only Ag2CO3 will precipitate from the solution.

When Na2CO3 is added to the solution, it will react with the Ag^+ and Pb^2+ ions to form precipitates of Ag2CO3 and PbCO3. The Mn^2+ ion concentration is not high enough to form a precipitate with Na2CO3.

First, let's calculate the initial concentration of Ag^+ and Pb^2+ ions in the solution:

Ag^+: 0.00050 M

Pb^2+: 0.00050 M

Next, we need to calculate the concentration of Na2CO3 after it is added to the solution. Since we added 10.00 ml of 1.0*10^-6 M Na2CO3 to a total volume of 500 ml, the final concentration of Na2CO3 is:

[Na2CO3] = (10.00 ml / 500 ml) * 1.010^-6 M

[Na2CO3] = 2.010^-8 M

Now we can use the Ksp values to determine which precipitates will form.

For Ag2CO3:

Ksp = [Ag^+]^2[CO3^2-]

8.110^-12 = (2x)^2 (2x)

8.110^-12 = 4x^3

x = 2.0*10^-4 M

Since the concentration of CO3^2- is higher than the solubility product, Ag2CO3 will precipitate.

For PbCO3:

Ksp = [Pb^2+][CO3^2-]

7.410^-14 = (0.00050 M)(2x)

x = 9.210^-11 M

Since the concentration of CO3^2- is lower than the solubility product, PbCO3 will not precipitate.

Therefore, the only precipitate that will form is Ag2CO3.

More on precipitation reactions can be found here: https://brainly.com/question/24158764

#SPJ1

A water solvent-based solution with a pH change of 3.24 is made up of a combination of a weak acid and the conjugate base of the weak acid

A simple buffer is a solution that combines a strong acid with a weak base in relatively high concentrations. These buffers are alkaline because their pH is higher than 7 at 298 K. Consider NH4OH and NH4Cl.

Buffer solutions maintain a constant pH by neutralizing extra acids or bases. These compounds consist of a weak acid and its conjugate base, which exchange protons and hydroxide ions to produce water.

pH = -log(7.1×10−4×0.380.47)7.1×10-4×0.380.47 = 3.24

[H3O+] = 7.1 x 10-4 x 0.380.47

To know more about buffer solution visit:

https://brainly.com/question/24262133

#SPJ1

Ancef (Cefazolin) is a first-generation cephalosporin antibiotic that is used to treat bacterial infections. Cefazolin is available in several formulations, including injectable, intravenous, and powder for injection.

For such more question on  antibiotic

https://brainly.com/question/11849121

#SPJ8

Answer:

0.077M is the concentration of the hydroxyl ion

Explanation:

If 7.35 cm3 of this base is take and diluted to 147 cm3, then what is the concentration of the hydroxyl ion?

Use the dilution equation:

M1V1 = M2V2

M1 * 147cm³ = 1.5 M * 7.35 cm³

M1 = 1.5 M * 7.35 cm³ / 147 cm³

M1 = 0.077 M

How many moles of hydroxyl ion are there in the 7.35 cm3?

1000 cm³ contains 1.5 mol OH- ions

7.35 cm³ contains : 7.35 cm³ / 1000 cm³ *1.5 mol

= 0.011025 mol

Answer:

Answer is 1: Electric charges have electric fields surrounding them that allow them to exert forces on other objects without touching them.

Option 1 offers the best justification for why two negatively charged balloons travel apart but never touch: Electric charges may exert pressures on other things without ever contacting them because of the electric fields that surround them.

This is because electric charges generate electric fields that, even when they are not in contact with other things, may push and pull on them. This is because electric fields—invisible lines of force that emerge from an electric charge and radiate out—can interact with other electric charges as well as physical things.

One balloon's electric field will interact with the electric field of the second balloon, pushing the two balloons apart. Because electrons do not leap from one balloon to another, Option 2 is inaccurate.Because electrons do not leap from one balloon to the next, Option 2 is untrue. Instead, the balloons are forced apart by the interaction of the electric fields.

Option 3 is erroneous because charged particles do not fill the void between the items. Instead, the electric charges cause electric fields to fill the area. Option 4 is erroneous because charged objects do not transmit tiny electron lightning bolts across the space between the two balloons, which brings us to our last error.

Instead, the balloons are forced apart by the interaction of the electric fields.

Learn more about  electric fields at:

https://brainly.com/question/15800304

#SPJ3

KH2PO4 is a more suitable choice as a buffer because it has a greater buffering capacity due to the presence of the weak acid and its conjugate base.

KHPo4 is not considered an effective buffer compared to KH2PO4 due to its limited buffering capacity. The effectiveness of a buffer is determined by the concentration and dissociation properties of its conjugate acid-base pair.

KH2PO4 is a salt composed of the weak acid H2PO4- and its conjugate base HPO4^2-. In an aqueous solution, KH2PO4 can dissociate to release H+ ions from the H2PO4- component, which acts as a weak acid, and the HPO4^2- component can accept H+ ions, acting as a weak base. This allows KH2PO4 to effectively resist changes in pH when small amounts of acid or base are added to the solution.

On the other hand, KHPo4 consists of the strong acid H3PO4 and the weak base HPO4^2-. H3PO4 fully dissociates in water, providing a large concentration of H+ ions, making it difficult for the HPO4^2- to effectively act as a base and maintain pH stability.

Therefore, KH2PO4 is a more suitable choice as a buffer because it has a greater buffering capacity due to the presence of the weak acid and its conjugate base.

For more question on conjugate

https://brainly.com/question/14684465

#SPJ8

Answer:

gene

Explanation:

DNA is divided into functional units called genes. A gene is a segment of DNA that codes for a functional product (mRNA, tRNA, or rRNA). Since the vast majority of genes are transcribed into mRNA and mRNA is subsequently translated into polypeptides or proteins, most genes code for protein synthesis

Answer:

coding for protein are called exons, and the noncoding regions separating the exons are called introns. Following transcription, these coding sequences must be joined together before the mRNAs can function. The process of removal of the introns and subsequent rejoining of the exons is called RNA splicing.

Explanation:

Answer:

Volume of bacteria cell into Pico liters = 60.27 Pico liters

Explanation:

Given:

Volume of bacteria cell = 6.027 x 10⁻¹⁰ L

Find:

Volume of bacteria cell into Pico liters

Computation:

1 L = 10¹² Pico liters

So,

Volume of bacteria cell = 6.027 x 10⁻¹⁰ L

Volume of bacteria cell = 6.027 x 10⁻¹⁰ x 10¹² Pico liters

Volume of bacteria cell into Pico liters = 60.27 Pico liters

ATQ

\(\\ \sf\hookrightarrow A+B=3.26\)

\(\\ \sf\hookrightarrow P+0.7=3.26\)

\(\\ \sf\hookrightarrow P=3.26-0.7\)

\(\\ \sf\hookrightarrow P=2.56atm\)

The partial pressure of gas B is 2.56 atmosphere in a mixture which has pressure of 3.26 atmosphere.

Pressure is defined as the force applied on an object perpendicular to  it's surface  per unit area over which it is distributed.Gauge pressure  is a pressure which is related with the ambient pressure.

There are various units by which pressure is expressed most of which are derived units  which are obtained  from unit of force divided by unit of area . The SI unit of pressure is pascal .

It is a scalar quantity  which is related to the vector area element  with  a normal force acting on it.It is distributed over solid boundaries and across arbitary sections  of fluid normal  to the boundaries at every point.

In this case, pressure of  gas B is obtained by subtracting pressure of gas A from the total pressure ,that is 3.26-0.70=2.56 atmosphere.

Thus ,the partial pressure of gas B in atmosphere is 2.56 atmosphere.

Learn more about pressure,here:

https://brainly.com/question/18107358

#SPJ2

we would need 2625.13 grams (or 2.62513 kilograms) of NaCl.

To calculate the mass of NaCl required to produce a 26.4 mol/L solution with a 1.7 L volume, we need to use the formula that relates the mass of solute, moles of solute, and molarity:Molarity (M) = moles of solute / liters of solution Rearranging this formula, we get:moles of solute = Molarity (M) x liters of solutionWe can use this formula to find the moles of NaCl needed:moles of NaCl = 26.4 mol/L x 1.7 L = 44.88 molNow, we can use the molar mass of NaCl to convert from moles to grams. The molar mass of NaCl is 58.44 g/mol:mass of NaCl = moles of NaCl x molar mass of NaClmass of NaCl = 44.88 mol x 58.44 g/mol = 2625.13 gTo produce a 26.4 mol/L solution with a 1.7 L volume.

for more question on NaCl

https://brainly.com/question/23269908

#SPJ8

According to molar concentration and pH concept, the pH of this solution is 0.808.

Molar concentration is defined as a measure by which concentration of chemical substances present in a solution are determined. It is defined in particular reference to solute concentration in a solution . Most commonly used unit for molar concentration is moles/liter.

The molar concentration depends on change in volume of the solution which is mainly due to thermal expansion. Molar concentration is calculated by the formula, molar concentration=mass/ molar mass ×1/volume of solution in liters.Substitution of values in formula gives, molarity= 12.5/40×1/2=0.156 M  which is H+ concentration, thus pH=-log[H+]=-log[0.156]=0.808 M.

Learn more about molar concentration,here:

https://brainly.com/question/21841645

#SPJ1

Answer:

36 grams of Calcium

Explanation:

In order to calculate the gram of calcium, divide the total number of Calcium atoms by Avogadro's number:

(2.17 x 10^25)/(6.02 x 10^23) =

2.17/6.02 * 10^25/10^23 =

2.17/6.02 * 10^25/10^23 =

0.36 * 10^(25-23) =

0.36 * 10^2 =

0.36 * 100 = 36 grams of Calcium

Answer:

\(m_{NaHCO_3}=16.8gNaHCO_3\)

Explanation:

Hello!

In this case, since the molecular formula of sodium bicarbonate is:

\(NaHCO_3\)

We realize it has a molar mass of 84.007 g/mol; therefore, as we need the mass in 0.200 moles of sodium bicarbonate, we develop the following setup:

\(m_{NaHCO_3}=0.200NaHCO_3*\frac{84.007gNaHCO_3}{1molNaHCO_3}\)

Thus, we obtain:

\(m_{NaHCO_3}=16.8gNaHCO_3\)

Best regards!

The balanced chemical equation is

Pb(NO3)2 (s) + H2SO4 (aq) PbSO4 (s) + 2HNO3 for the reaction of lead sulphate from lead nitrate solution and dilute

sulfuric acid (aq).

ionic net equation PbSO4 is formed by combining SO4 2-(aq) and Pb 2+(aq) (s)

For more information on balanced equation kindly visit to

https://brainly.com/question/12192253

#SPJ1

The protons of the element X is the same as the electrons which is equal to 81.

A proton is defined as the particle of an atom that is located at the center of the atom which has a positive charge.

A neutron is defined as the particle of an atom that is located also at the center of the atom that bears no charges.

The electron is defined as the particle of an atom that is negatively charged and it revolves round the nucleus of the atom.

The protons of the element X is the same as the electrons which is equal to 81. This is because the nuclei would attract only the number of electrons to the number of protons they contain to make the charges equal.

Learn more about atoms here:

https://brainly.com/question/1805828

#SPJ1

1) Element 35 is a gas

2) It would be in period 7

3) It would be a non metal

4) At would look more like iodine because both of them are closer down the group.

5) It can act both as metal and non metal.

6) Atom is neutral while ions have a charge

7) The second ionization energy is larger because it would take more energy to remove an electron from a positive specie

a) Cl has the largest atomic radius

b) Ca has the largest atomic radius

c) Cl has the largest atomic radius

8) In order of increasing atomic radius we have; Ar < Kr < Xe

The periodic table is a tabular arrangement of the chemical elements, organized on the basis of their atomic number, electron configurations, and chemical properties.

The periodic table is one of the most important tools in chemistry, as it provides a convenient way to identify and categorize the elements. The elements are arranged in rows and columns, with elements in the same row having similar chemical and physical properties. The periodic table is used by scientists and students to understand the properties of elements, predict the chemical behavior of substances, and form hypotheses about new elements that have not yet been discovered.

Learn more about periodic table:https://brainly.com/question/11155928

#SPJ1

The percent by mass of the fluorine in the compound is 46.472%.

We know that the percent by mass has to do with the ratio of the total mass of the atom that is part of the compound and the total molar mass of the compound multiplied by one hundred.

The question in this case has demanded that we ought to obtain the mass percent of fluorine from the compound that we can be able to identify from the formula of the compound that is shown here as xenon hexa fluoride.

Mass of the compound can be obtained from; 131 + 6(19)

= 245 g/mol

The total mass of the fluorine atom in the compound is 114 g

Thus we have the use of;  114 /245 * 100/1

= 46.472%

The percent  by mass is now gotten for the fluorine atom as 46.472%.

Learn more about percent by mass:https://brainly.com/question/5394922

#SPJ1

Answer:

A salt is a neutral ionic compound. Let's see how a neutralization reaction produces both water and a salt, using as an example the reaction between solutions of hydrochloric acid and sodium hydroxide. The overall equation for this reaction is: NaOH + HCI → H2O and NaCl.

Explanation:

#Let's Study

#I Hope It's Help

#Keep On Learning

#Carry On Learning

\(\\ \orange{MaggieEve}\)

Answer: glucose

Explanation:

Explanation:

system at equilibrium, will the reaction shift towards reactants ~

--?'

2. (2 Pts) Consider the reaction N2(g) + 3H2(g) =; 2NH3(g). The production of ammonia is an

exothermic reaction. Will heating the equilibrium system increase o~e amount of

ammonia produced? . .co:(

3. (2 Pts) Consider the reaction N2(g) + 3H2(g) =; 2NH3(g). Ifwe use a catalyst, which way will

the reaction shift? ':'\

.1.+- w~t s~,H (o')l r'eo.c. e~ ei~i"liht-,·u.fn\ P~~,

4. (3 Pts) ff 1ven th e o £ 11 owmg d t a a £ or th ere action: A(g) + 2B(s) =; AB2(g)

Temperature (K) Kc

300 1.5x104

600 55 k ' pr, cl l<..J~

e- ~ r fee, ct o. ~ 1<

900 3.4 X 10-3

Is the reaction endothermic or exothermic (explain your answer)?

t d- IS o.,;r-. \4\a..i~1f't~ °the te.Y'il(lf1,:J'u.r-a a•~S. j lrvdu..c,,.) +~H~to{' '\

exothe-rnh't.-- ,.. ..,. (/.., ,~.

5. (4 Pts) Consider the reaction, N2(g) + 3H2(g) =; 2NH3(g). Kc= 4.2 at 600 K.

What is the value of Kc for 4 NH3(g) =; 2N2(g) + 6H2(g)

N ... ~l + 3 H~(ri ~ ~Nli3~) kl,= ~:s;H,J3 # 4. J..

~ ;)N~~) ~ ~ H ~) ~\-_ == [A!;J:t D~~Jb

J. [,v 1+3] ~

I

4,:i.~ = 0,05

5.00 mol of ammonia are introduced into a 5.00 L reactor vessel and when the equilibrium is reached, 1.00 mole remains. The concentration equilibrium constant is 17.3.

Initially, there are 5.00 mol of ammonia in a 5.00 L reactor vessel. The initial concentration of ammonia is:

\([NH_3]_i = \frac{5.00mol}{5.00L} = 1.00 M\)

At equilibrium, there is 1.00 mole of ammonia in the 5.00 L vessel. The concentration of ammonia at equilibrium is:

\([NH_3]eq = \frac{1.00mol}{5.00L} = 0.200 M\)

We can calculate the concentrations of all the species at equilibrium using an ICE chart.

       2 NH₃(g) ⇄ 3 H₂(g) + N₂(g)

I          1.00              0          0

C         -2x              +3x        +x

E       1.00-2x          3x          x

Since the concentration of ammonia at equilibrium is 0.200 M,

\(1.00-2x = 0.200\\\\x = 0.400 M\)

The concentrations of all the species at equilibrium are:

\([NH_3] = 0.200 M\\[H_2] = 3x = 1.20 M\\[N_2] = x = 0.400 M\)

The concentration equilibrium constant (Kc) is:

\(Kc = \frac{[H_2]^{2} [N_2]}{[NH_3]^{2} } = \frac{(1.20^{3})(0.400) }{0.200^{2} } = 17.3\)

5.00 mol of ammonia are introduced into a 5.00 L reactor vessel and when the equilibrium is reached, 1.00 mole remains. The concentration equilibrium constant is 17.3.

Learn more: https://brainly.com/question/15118952

To create molecules, atoms combine. Two hydrogen (H) atoms and one oxygen (O) atom make up a water molecule's three atoms. H2O is a common abbreviation for water because of this.

The smallest unit of a material that keeps its content and characteristics is a molecule, which is made up of two or more atoms linked together by chemical bonds. The building blocks of chemistry are molecules.

The phrase "the molecules of life" frequently refers to these four categories of molecules. Proteins, carbohydrates, lipids, and nucleic acids make up the four basic building blocks of life. Every single life on Earth depends on one or more of the four categories. These four molecules are necessary for a cell and an organism to exist.

To know more about molecules visit:

https://brainly.com/question/19922822

#SPJ1

The reaction can be said to be at equilibrium when the reaction rates of making products and using reactants are equal.

When the rates of the forward and reverse reactions are equal and the concentrations of the reactants and products don't change over time, a chemical reaction is said to be in equilibrium.

When the system reaches equilibrium, it is in a state of balance, which means that the concentrations of the reactants and products have not changed significantly.

Learn more about reaction equilibrium:https://brainly.com/question/9024475

#SPJ1

Answer:

B

Explanation:

if it releases energy it becomes a solid(Solid)

if it absorbs energy it becomes a gas(Water Vapor)

Answer:

Volume = 3.4 L

Explanation:

In order to calculate the volume of CO₂ produced when 15.2 g of CaCO₃ is heated, we need to first write out the balanced equation of the thermal decomposition of CaCO₃:

CaCO₃ (s) + [Heat] ⇒ CaO (s) + CO₂ (g)

Now, let's calculate the number of moles in 15.2 g CaCO₃:

mole no. = \(\mathrm{\frac{mass}{molar \ mass}}\)

                 = \(\frac{15.2}{40.1 + 12 + (16 \times 3)}\)

                 = 0.1518 moles

From the balanced equation above, we can see that the stoichiometric molar ratios of CaCO₃ and CO₂ are equal. Therefore, the number of moles of CO₂ produced is also 0.1518 moles.

Hence, from the formula for the number of moles of a gas, we can calculate the volume of  CO₂:

mole no. = \(\mathrm{\frac{Volume \ in \ L}{22.4}}\)

⇒ \(0.1518 = \mathrm{\frac{Volume}{22.4}}\)

⇒ Volume = 0.1518 × 22.4

                 = 3.4 L

Therefore, if 15.2 g of CaCO₃ is heated, 3.4 L of CO₂ is produced at STP.

The amount of heat energy produced when 1 g of hydrogen and 2 g of nitrogen are reacted, is -6.61 KJ

First, we shall obtain the limiting reactant. Details below:

3H₂ + N₂ -> 2NH₃

From the balanced equation above,

28 g of N₂ reacted with 6 g of H₂

Therefore,

2 g of N₂ will react with = (2 × 6) / 28 = 0.43 g of H₂

We can see that only 0.43 g of H₂ is needed in the reaction.

Thus, the limiting reactant is N₂

Finally, we the amount of heat energy produced. Details below:

3H₂ + N₂ -> 2NH₃ ΔH = -92.6 KJ

From the balanced equation above,

When 28 grams of N₂ reacted, -92.6 KJ of heat energy were produced.

Therefore,

When 2 grams of N₂ will react to produce = (2 × -92.6) / 28 = -6.61 KJ

Thus the heat energy produced from the reaction is -6.61 KJ

Learn more about heat energy:

https://brainly.com/question/31429264

#SPJ1

A buffer solution is the  consists of a mixture of a weak acid and its conjugate base. it resists changes in pH upon addition of small amounts of acid or base.

The correct option from the given option is , the A buffer solution is the  consists of a mixture of a weak acid and its conjugate base. or the weak base and the conjugate acid. A buffer solution resist the the change in pH upon the addition of the small amount of the acid or base to them. the pH of buffer shows the little change when we add very small amount of the strong acid and the strong base.

The buffer solution has the ability to maintain the hydrogen ion concentration with only small amount of dilution  with acid or base.                                  

To learn more about buffer solution here

https://brainly.com/question/13219011

#SPJ4

Answer:

Only C. is wrong else every option is correct.

Explanation:

Hope this helps you. If you want explanation then ask in comments. Good luck!