Nitrosyl chloride, NOCl, dissociates on heating as shown below. When a 1.50 gram sample of pure NOCl is heated at 350oC in a volume of 1.00 liter, the percent dissociation is found to be 57.2%. Calculate Kc for the reaction as written.

NOCl(g) NO(g) + 1/2 Cl2(g)

Answers

Answer 1

The Kc of the reaction is obtained as 0.013.

What is the Kc?

We know that the Kc can be obtained form the formula;

a = √Kc/C

Where;

a = the percent dissociation

Kc = dissociation constant

C = concentration

The number of moles of the nitrosyl chloride =  1.50 g/65 g/mol

= 0.023 moles

Concentration of the nitrosyl chloride = 0.023 moles/1.00 liter

= 0.023 M

Then we would have

Kc = Ca^2

Kc = 0.023 * 0.572

Kc = 0.013

The percent dissociation of the compound would be seen to be 0.013.

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Related Questions

what mass of hbr is dissolved in 500 ml water of hcl solution if 25 ml of this solution is neutralized by 20ml water of 0.67 M NaOH

Answers

The mass of HCl dissolved in 500 ml water of HCl solution is equal to 9.78 g.

What is a neutralization reaction?

A neutralization reaction can be defined as a reaction in which an acid and base react to produce salt and water.

When HCl reacts with NaOH, the resulting salt is sodium chloride and water.

HCl    +    NaOH   →   NaCl   + H₂O

Given, the volume of NaOH solution = 20 ml

The concentration of NaOH = 0.67 M

The number of moles of NaOH = (20 /1000) ×0.67 = 0.0134

The number of moles of HCl = 0.0134 mol

The volume of HCl taken = 25 ml = 0.025 L

The concentration of HCl solution = 0.0134/0.025 = 0.536 M

The volume of HCl solution = 500 ml

The number of moles of HCl = 0.536 × 0.5 = 0.268 mol

The mass of HCl = 0.268 × 36.5 = 9.78 g

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. n specifies fill in the blank 4 l specifies fill in the blank 5 ml specifies fill in the blank 6 ... a.the orbital orientation. b.the energy and average distance from the nucleus. c.the subshell - orbital shape.

Answers

n specifies B. The energy and average distance from the nucleus, l specifies C. The subshell - orbital shape, ml specifies A. The orbital orientation.

n is known Principal quantum number

l is known Azimuthal quantum number

ml is known Magnetic quantum number

The energy and usual distance from the nucleus are described by the fundamental quantum number, or n.

The subshell and orbit's shape are described by the orbital quantum number, or l.

The orbit's direction is described by the magnetic quantum number, ml.

So, n specifies B. The energy and average distance from the nucleus.

l specifies C. The subshell - orbital shape.

ml specifies A. The orbital orientation.

Thus, n specifies B., l specifies C., ml specifies A.

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9. The Sun is powered by the fusion of hydrogen atoms into
helium atoms. When the Sun has exhausted its hydrogen sup-
ply, it could fuse helium-4, forming carbon-12. Write a
balanced nuclear equation for this process.

Answers

Answer: A balanced nuclear equation for the fusion of helium-4 to form carbon-12 would be:

He-4 + He-4 -> C-12 + energy

In this equation, two helium-4 atoms fuse to form a single carbon-12 atom and release energy. This process would occur in the core of the Sun once it has exhausted its supply of hydrogen and begins to fuse helium-4.

Draw the electron pair geometry for sulfur tetrafluoride, SF4, . What the name of the molecular shape of sulfur tetrafluoride

Answers

Answer: The hybridization that is involved in SF4 is sp3d type. Here will learn and understand how to determine SF4 hybridization. We will discuss the steps in detail.

Name of the Molecule Sulphur Tetrafluoride

Molecular Formula = SF4

Hybridization Type = sp3d

Bond Angle = 102o and 173o

Geometry = see-saw

Explanation:

In order to determine the hybridization of sulphur tetrafluoride, you have to first understand its Lewis structure and the number of valence electrons that are present. The SF4 molecule consists of a total of 34 valence electrons. Here 6 will come from sulphur and each of the four fluorine atoms will have 7 electrons.

During the formation of SF4, the sulphur atom will form bonds with each of the fluorine atoms where 8 valence electrons are used. Meanwhile, the four fluorine atoms will have 3 lone pairs of electrons in their octet which will further utilize 24 valence electrons. In addition, two electrons will be kept as lone pairs in the sulphur atom. Now we can determine sulphur’s hybridization by taking a count of the number of regions of electron density.

When bonding takes place there is a formation of 4 single bonds in sulphur and it has 1 lone pair. Looking at this, we can say that the number of regions of electron density is 5.

EXTERNAL LINKS :

https://www.chemtube3d.com/vseprshapesf4/

https://geometryofmolecules.com/sf4-lewis-structure-polarity/

as an immediate precautionary measure, how far should you isolate the leak area in all directions? qzuilet

Answers

As an intermediate precautionary measure, I should isolate the leak area in all directions for 50 metres(150 feet).

These manuals advise a 150-foot initial isolation in all directions. Responders should always strive to position themselves uphill, upwind, and upstream of the incident when responding to a scene involving hazardous materials.

Small spills (less than 52.83 gallons, or 200 litres): 100 feet in all directions should be isolated first (30 m). then during the day, safeguard those who are downwind: 0.2 mi (0.2 km). then throughout the night, safeguard those who are downwind: 0.8 mi (1.2 km).

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help fast Which products are the result of a reaction between potassium fluoride, KF, and sodium hydroxide, NaOH?

KNa and FOH

KOH and NaF

Na and KFOH

K and FNaOH

Answers

Potassium fluoride and sodium hydroxide react to produce potassium hydroxide and sodium fluoride respectively. Option 2.

Chemical reaction

Potassium fluoride and sodium hydroxide undergo a double decomposition reaction. They exchange radicals to produce potassium hydroxide and sodium fluoride respectively according to the following equation:  

[tex]KF + NaOH --- > KOH + NaF[/tex]

Potassium is able to displace sodium from sodium hydroxide because it is higher on the reactivity series of metals than sodium.

Thus, the product of the reaction of potassium fluoride and sodium hydroxide are [tex]KOH[/tex] and [tex]NaF[/tex].

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the half-life of plutonium-234 is 9 hours. if 80 milligrams is present now, how much will be present in 3 days?

Answers

the half-life of plutonium-234 is 9 hours. if 80 milligrams is present now, 80/(3.2^8)  will be present in 3 days.

3 days = 72 hrs= 8 half lives, amount remaining after 't' half lives is 80(1/2^t), amnt after 70 hrs = 80(1/2^8)., amnt after 79 hrs = 80(1/2^9).

amnt decayed in the 9th half life is 80((1/2^8)-(1/2^9))=80(1/2^9)., amnt decayed from 70 hrs to 72 hrs = (2/3)(70/2^9). amnt remaining after 72 hrs = 80(1/2^8) - (2/3)(80/2^9) = 80/(3.2^8) ans

The half-life of a quantity is the time it takes to decrease to half of its original value. In nuclear physics, the term is frequently used to define how quickly atoms undergo radioactivity or how long steady atoms stay alive. The term is also used to describe any form of exponentially decaying in general. The half-life is then determined by calculating to use the fundamental description of activity, which is defined as the good or service of the radionuclide decay constant, as well as the amount of radioactive atoms present, N. One solves for and obtains the half-life from the equation = ln2/T1/2.

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what is the form of energy contained in a dam called? group of answer choices nuclear chemical kinetic potential

Answers

Potential Energy is the form of energy contained in dam.

Total energy:

The total energy of each considered object is the sum of its potential energy (P.E) and kinetic energy (K.E) and is constant throughout motion. For example, at finite height, a ball has maximum potential energy and zero kinetic energy, and when released, K.E increases and becomes maximum at ground level, and P.E decreases to zero at ground level. , so the total energy increases. There is movement of the ball in the same way everywhere. The energy that an object has due to its motion is called kinetic energy, and the energy that an object has due to its position and shape is called potential energy.

Here the water dammed by the dam has a certain potential height. This means that water has latent energy because it is located far from the bottom. Therefore, water dammed up by a dam has potential energy.

Potential Energy:

In physics, potential energy is the energy possessed by an object due to its position relative to other objects, its own tension, electrical charge, or other factors. Common types of potential energy are the gravitational potential energy of a body, the elastic potential energy of an extended spring, and the electrical potential energy of an electric charge in an electric field. The unit of energy in the International System of Units (SI) is the joule, and the symbol is J.

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The diagram shows changes of state between solid, liquid, and gas. The atoms of a substance gain energy during a change of state. Before the change, the atoms are close together and cannot slide past one another. After the change, the substance can fill its container.

A diagram has a triangle at center with gas on top, liquid on bottom right, solid on bottom left. An arrow from gas to liquid is labeled O, and an arrow from liquid to gas is labeled N. An arrow from solid to liquid is labeled P, and an arrow from liquid to solid is labeled Q. An arrow from solid to gas is labeled L, and an arrow from gas to solid is labeled M.
Which arrow represents the change of state described above?

Answers

The arrow that represents the change of state that has been described is L.

What are the states of matter?

We know that there are three states of matter of matter and these are the solid, the liquid and the gas. We know that in the solid state, the particles that compose matter are all joined together and they are held in fixed positions and can not be able to slide past one another.

As such, we have been shown the diagram that shows the way that the energy is transferred between the states of matter in the image that is attached to this answer.

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Answer:

Its A

Explanation:

I got it right

What description explains how pollen is received?

The ovule at the top of the pistil receives pollen.
The stigma at the top of the pistil receives pollen.
The pistil at the top of the stamen receives pollen.
The stamen at the top of the pistil receives pollen.

Answers

The description which explains how pollen is received is that the stigma at the top of the pistil receives pollen and is therefore denoted as option B.

What is Pollen?

This is a powdery substance produced by seed plants and it consists of one or more vegetative cells and a reproductive cell. It is involved in the production of the male gametes in plants which makes it an importgant component in the ecosystem.

During pollination by different types of agents such as birds, wind etc the pollen are dispersed in various directions in which some get to the stigma at the top of the pistil which is the female reproductive part of the plant.

This therefore leads to fertilization and a fruit is formed as a result which is therefore the reason why option B was chosen as the correct answer.

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draw the Lewis structure for CH4 and SeH2 in the window below and then decide at the molecule is polar or nonpolar`

Answers

A Lewis Structure is a very simplistic representation of the valence shell electrons of a molecule.

What is meant by Lewis structure ?

The valence shell electrons in a molecule are depicted in an extremely simplified manner by a Lewis Structure. It serves to display how the electrons are positioned around particular molecules' atoms.

Gilbert N. Lewis, who first described it in his 1916 article The Atom and the Molecule, gave the Lewis structure its name. Lewis structures expand on the concept of the electron dot diagram by adding lines between atoms to represent shared pairs in a chemical bond.

By adding dots to the outer energy around the element's symbol to indicate electrons, a Lewis symbol is created. The number of dots for many common items matches the element's group number. The Lewis Symbols for several elements are listed below.

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Describe where the error (if any) is in the following orbital diagram. If there is an error, be sure to include the name of the rule and how to correct it. It is okay that the orbital diagram is horizontal- this is a space saver (energy increases to the right).

Answers

The electrons in an atom are depicted in orbital diagrams in visual form. For creating orbital diagrams, three rules are helpful.

What is Orbital diagram?

Each electron resides in the orbital with the , in accordance with the Auf Bau Principle.

According to the Pauli Exclusion Principle, an orbital can hold no more than two electrons. According to Hund's rule, electrons enter various orbitals within a single sub-level before doubling up within orbitals.

We have seen how the quantity and kind of valence electrons play a crucial role in establishing the chemical characteristics of a specific element. Due to their propensity to lose their single valence, Group 1A metals are extremely reactive.

Therefore, The electrons in an atom are depicted in orbital diagrams in visual form. For creating orbital diagrams, three rules are helpful.

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How many liters (L) of water need to be added to prepare 1000mL of 0.3M NaCl from a 5M NaCl stock solution?

Answers

The amount of water needed to be added to prepare the solution would be 0.94 liters.

Dilution problem

When diluting solutions, the number of moles of solutes before dilution must be equal to the number of solutes after dilution. The only thing that changes are the volume and concentration.

Thus, the equation of dilution is:

[tex]m_1v_1[/tex] = [tex]m_2v_2[/tex]

Where

[tex]m_1[/tex] is molarity before dilution[tex]v_1[/tex] is volume before dilution[tex]m_2[/tex] is molarity after dilution[tex]v_2[/tex] is volume after dilution

In this case:

[tex]m_1[/tex] = 5 M, [tex]m_2[/tex] = 0.3 M, and [tex]v_2[/tex] = 1000 mL

Substituting:

5[tex]v_1[/tex] = 0.3 x 1000

    [tex]v_1[/tex] = 300/5

        = 60 mL

This means that the volume of the stock solution to be taken is 60 mL. The amount of water to be added would then be:

1000 - 60 = 940 mL

940 mL = 0.94 L

In other words, the amount of water needed to be added to prepare 1000 mL of 0.3M NaCl from a 5 M NaCl stock solution is 0.94 L.

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The compound between Sulfur and Magnesium is _

Answers

Answer:

Magnesium sulfide

Explanation:

Ultra-light vs. Ultra-hard
Compared to the atomic arrangement of atoms in diamond, the atomic arrangement of atoms in the ultra-light material were..

a arranged in a line of atoms
b spread apart, chaotic, and spongy
c arranged in a pattern of highly organized crystals
d flat orderly 2-dimensional sheets

Answers

Compared to the atomic arrangement of atoms in diamond, the atomic arrangement of atoms in the ultra-light material were option B: spread apart, chaotic, and spongy.

What is the atomic arrangement about?

The atomic arrangement of atoms in the ultra-light material described in the question is likely to be different from that of diamond. Diamond is a very hard and rigid material, with a highly ordered and crystalline atomic structure.

In contrast, the ultra-light material is described as being "spread apart, chaotic, and spongy," which suggests that its atomic arrangement is much less organized and more disordered than that of diamond.

Therefore, based on the above, this may be due to the use of a different type of bonding between atoms, or a different arrangement of atoms within the material, which results in a less rigid and more flexible structure.

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hydrogen cyanide, hcn, is a poisonous gas. the lethal dose is approximately 300 hcn per kilogram of air when inhaled. (a) calculate the amount of hcn that gives the lethal dose in a small laboratory room measuring . the density of air at is 0.00118 (b) if the hcn is formed by reaction of with an acid such as what mass of nacn gives the lethal dose in the room?

Answers

The amount of HCn that gives the lethal dose in a small laboratory room measuring  the density of air at is 0.00118 is 14.4 g of the HCN.

The volume of the air present in laboratory room is as :

volume of laboratory room = length × breadth × height

                                             = 12 × 15 × 8 ft³

                                              = 1440 ft³ = 4.08 × 10⁷ cm³

The mass of  air = density of air × volume of the laboratory room

                          = 0.00118 g /cm³ × 4.08 × 10⁷ cm³

                         = 48210.7 g = 48.21 kg

a) The lethal dose of HCN in the 1kg of the air = 300 × 10⁻³ g of HCN

therefore , for 48.21 kg =  300 × 10⁻³ × 48.21

                                       = 14.4 g

b) 2 moles of the HCN form the 2 moles of NaCN

molar mass of NaCN = 49 g/mol

molar mass of HCN = 27 g/mol

54 g of HCN will form 98 g of NaCN

14.4 g of HCN is consider as the lethal dose

theferfore , mass of NaCN give the lethal dose = (98 / 54 ) 14.4

                                                                               = 26.22 g

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uppose there are 5 chemists and 10 mathematicians in a room. a) how many ways can you select six people from the room?

Answers

The number of way to select people from a total of a people is a! /b!·(a-b)!

plugging in 15 for A and 6 for B

P= 15! / 6!(15-6)!

P= 1307674368000 / 720·9!

P= 1307674368000 / 362880

P= 360360

By choosing some items from a set and creating subsets, permutation and combination are two approaches to represent a group of objects. It outlines the numerous configurations for a particular set of data. Permutations are the selection of data or objects from a set, whereas combinations are the order in which they are represented. Both ideas are critical to mathematics.

Here, the differences between permutation and combination are described in detail. Here, we'll talk about both subjects with formulas, examples from everyday life, and questions that have been answered. Students can also work on the Permutation and Combination Worksheet to improve their understanding of this subject and learn shortcuts for answering additional questions.

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what is the simplest formula of a solid containing a, b, and c atoms in a cubic lattice in which a atoms occupy two corners and one body-center position, the b atoms occupy two corners, and the c atoms occupy four corners and two faces of the unit cell?

Answers

A solid with atoms a, b, and c arranged in a cubic lattice has the simplest formula possible: abc3.

Given that the unit cell's an atoms occupy two of its corners and one of its body centres, the b atoms occupy two corners, and the c atoms occupy four of its corners and two of its faces

There are eight corners, and each one has an atom in it.

Atomic number of a = 8 * 1/8 = 1

The centre b atom is the lone atom. So b = 1

Each of the six faces holds a c atom.

6 x 1/2 = 3 c atoms are present.

So when we combine them, we get the solid as abc3 formula.

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list at least Three chemical reactions that occur in making bread

Answers

Explanation:

Fermentation: When yeast is added to the dough, it begins to ferment the sugars present in the dough, producing carbon dioxide and ethanol. The carbon dioxide helps to leaven the dough, while the ethanol is mostly evaporated during baking.

Maillard reaction: During baking, the heat causes a reaction between the amino acids and sugars in the dough, producing a wide range of compounds that give bread its characteristic flavor and aroma. This reaction is known as the Maillard reaction.

Protein denaturation: The heat of baking causes the proteins in the dough to denature, or lose their native conformation. This helps to give bread its texture and structure, and also contributes to the development of its crust.

__________ is a pulling force. Atmospheric pressure also acts as a force on objects

Answers

Answer:

Gravity

Explanation:

select true or false: the radii of ions are always smaller than the radii of the corresponding atoms of the same element.

Answers

The given statement about radii is false and the correct statement is only radii of cation are always smaller than radii of corresponding atoms of same elements.

Radii of anions are greater than its parent atoms due to the following reasons:  1. Size of anion is always greater than its parent atom because anions are formed due to gain of electrons. When electrons increases there are still same number of protons. The attractive force is thus reduced as there are same number of protons attraction increased number of electrons. This causes the electrons to not be bound as tightly to the nucleus resulting in an increase in size. 2. Size of cation is always smaller than its parent atom  because as a particular atom looses electron, no of proton become more than no of electron and attraction forces increases. So radius decreases.

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The rate of effusion of substance A is 3 times the rate of effusion of substance B. If the molar mass of substance A is 4.00 g/mol, what is the molar mass of substance B?

Answers

The rate of effusion of substance A is 3 times the rate of effusion of substance B, and molar mass of A is 4g/mol, then molar mass of B is 36g/mol.

Graham Law:

The rate of effusion of a gaseous substance is inversely proportional to the square root of its molar mass. This is called Graham's Law

R = k/√M

where k is constant and m is molar mass of the substance.

rate of effusion of substance A is 3 times the rate of effusion of substance B.

molar mass of substance A is 4.00g/mol

Ra = 3Rb

Ra/Rb = √Mb/√Ma

3Rb/Rb = √Mb/√4

3 = √Mb/2

√Mb = 6

Mb = 36

so, molar mass of substance B is 36g/mol.

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Draw the Lewis structure for XeF2 in the window below and then answer the questions that follow. с P opy aste []* С ChemDoodle Is XeF2 polar or nonpolar?

Answers

If XeF2 is polar or nonpolar based on the Lewis Structure and the molecular geometry (shape).

What is nonpolar?A nonpolar molecule has no separation of charge, so no positive or negative poles are formed. In other words, the electrical charges of nonpolar molecules are evenly distributed across the molecule. Nonpolar molecules tend to dissolve well in nonpolar solvents, which are frequently organic solvents.In a polar molecule, one side of the molecule has a positive electrical charge and the other side has a negative electrical charge. Polar molecules tend to dissolve well in water and other polar solvents.There are also amphiphilic molecules, large molecules that have both polar and nonpolar groups attached to them. Because these molecules have both polar and nonpolar character, they make good surfactants, aiding in mixing water with fats.

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Cations are formed when neutral atoms lose neutrons positrons protons electrons

Answers

Cations are  formed when neutral atoms lose electrons from the valence shell of an atom.

What is an atom?

An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.

The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.

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what is the net ionic equation for the reaction that occurs when you mix aqueous solutions of khco3 and hc2h3o2 ?

Answers

The net ionic equation for the reaction that occurs when aqueous solutions of khco3 is mixed with HC2H3O2 : HCO3-(aq) + HC2H3O2 (aq) ---> H2O (l) + CO2 (g) + C2H3O2- (aq)

What is an ionic equation?

When ions of water-soluble salts interact with each other in aqueous medium; then it results in the formation of water-insoluble salts.

Ionic reactions occurs when two compounds react by transferring electrons and, in that process, they may form positively or negatively charged ions.

To find the formula of an ionic compound, first we have to identify the cation and write down its symbol and charge. Next, identify anion and write down its symbol and charge. Then, finally, combine these two ions to form an electrically neutral compound.

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How is melting similar to freezing? How is it different?

Answers

Melting and freezing refer to the changes in state which occur when the solid and liquid states interchange. Melting occurs when a solid is heated and turns to a liquid and freezing occurs when a liquid is cooled and turns to a solid.

Answer:

Melting and freezing both require energy, however melting involves the speeding up of molecules, and freezing involves slowing them down

Explanation:

Dna has an important role in making proteins, the biomolecules that help determine our traits as well as take part in chemical reactions throughout our bodies. Can you correctly label the steps/parts involved in protein synthesis?.

Answers

Protein synthesis is a process that is generated within cells where different organelles and genetic components are involved through which proteins are generated.

What are the steps of protein formation?

The biosynthesis of proteins will be given by different parts, beginning with the translation of the genetic material. It will be given by different steps:

1. mRNA binds to ribosomes and the aminoacyl-tRNA to be associated to the first codon of the mRNA is associated.

2. The elongation of the polypeptide chain occurs, in which the amino acids are joined

3. The elongation is finished when the termination codons are reached.

4. The translation components are released and post-translational modifications are started.

5. The folding, glycosylation and modification of amino acids occur

6. Finally, the protein is released to generate its function

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How many moles of chlorine are present in 3 moles of MgCl2

Answers

The amount, in moles, of chlorine that would be present in 3 moles of [tex]MgCl_2[/tex] would be 6 moles.

Stoichiometric problem

[tex]MgCl_2[/tex] is made from magnesium and chlorine molecules according to the following equation:

[tex]MgCl_2 --- > Mg^{2+} + 2Cl^-[/tex]

From the above equation, 1 mole of [tex]MgCl_2[/tex] is made up of 1 mole of Mg and 2 moles of Cl.

Following this established ratio, the amount of chlorine that would be present in 3 moles of  [tex]MgCl_2[/tex] can be calculated as follows:

1 mole [tex]MgCl_2[/tex] = 2 moles of Cl

3 moles  [tex]MgCl_2[/tex] = 2 x 3/1

                           = 6 moles of Cl

In other words, 6 moles of Cl would be present in 3 moles of [tex]MgCl_2[/tex].

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g a student chose 1m acetic acid as the buffer solution to inhibit the ph change of an aqueous solution. if a strong acid is added to the solution, would this buffer solution inhibit the change of ph to the aqueous solution? explain.

Answers

If in 1 M acetic acid as the buffer solution to inhibit the pH change of an aqueous solution, if the strong acid is added to the buffer solution the pH decrease.

The buffer solution consist of both the acid and the base. the weak acid and the conjugate base or the weak base and the conjugate acid. if we added the strong acid then pH value of the solution will decreases, the expression is given as:

pH = pka + log [salt]/ [acid]

pH = 1 / [H⁺]

it is clear form the above equations that as the H⁺ ions concentration increases the pH value of the solution decreases. the pH value and the H⁺ ions concentration are inversely proportion to each other.

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When warm air from a large body of water moves quickly into a land area of cold air, we can expect _________ to occur where the two air masses meet.

Answers

Answer: thunderstorms

Explanation:

Other Questions
Consider the function f (same as in the previous problem) defined on the interval [0, 4) as follows, F(x) = { 2/2 x. x [0,2]. 2, x [2, 4]Find the coefficients Cn of the eigenfunction expansion of function ff(x) = [infinity], n=1 cnyn(x), where y... for n = 1,2,3,... are the unit eigenfunctions of the Regular Sturm-Liouville system - y^n = y, y(O) = 0, y(4) = 0Note: Label your eigenfunctions so the eigenfunction for the lowest eigenvalue corresponds ton = 1. Therefore, use 2n 1 instead of 2n +1.C= ___ Most countries in Atlantic South America experienced which political change after winning independence from colonial powers? A. They created oligarchies that eventually became dictatorships. B. They were led by kings until they were recolonized by European powers. C. They established theocracies before creating republics. D. They were ruled by dictators before becoming democracies the sales-volume variance is sometimes due to . question 15 options: unexpected increase in manufacturing labor time unexpected increase in the use of quantities of inputs of raw material quality problems leading to customer dissatisfaction the difference between selling price and budgeted selling price what was the first of many new taxes that angreed colonists The total fertility rate in country A was 6.8 in 1980. Which of the following statements best supports the change in the total fertility rate in country A between 1980 and 2015?a. The total fertility rate decreased as a result of a delay in age of first marriage and increased contraceptive use.b. World food production will decrease, leading to increased famine.c. It is greater in countries with high infant-mortality rates than in countries with low infant-mortality rates.d. The population declined following depletion of food resources after a population overshoot. A uniform plane wave with parallel polarization is propagating in a lossless dielectric medium (l is 1), and is incident obliquely onto a plane boundary with another lossless dielectric medium (u 2, E 2). (30%) (a) Derive the Snell's laws of reflection and refraction in terms of the refractive indices and angles. (b) Derive the general expressions for the reflection and the transmission coefficients of the EM field. Find such expressions in terms of the refractive indices if both media are nonmagnetic, i.e., M F M 240. (c) Derive the general expression for the Brewster angle. Find such an expression in terms of the refractive indices if both media are nonmagnetic. (d) Prove that, under the condition of no reflection, the sum of the Brewster angle and the angle of refraction is 90 if both media are nonmagnetic. (e) For total reflection to occur, find the condition for the medium property and the critical angle. what does commandeered nate is lifting weights to build muscle for the upcoming football season. while nate is in the gym lifting, a group of cheerleaders comes in to start practice. while the cheerleaders were watching, nate was able to do 10 reps more than he has ever accomplished in the past. this best illustrates: The poll tax, the literacy test, and the actions of the ku klux klan were all attempts to limit the effectiveness of which action taken by the federal government? The Real Story Behind the Migrant Mother in the Great Depression-Era Photo Which of the following is not true about the photograph above?a.The picture is of a migrant mother and her children.b.The purpose of the photograph was to show and preserve the true mood and circumstances of the Great Depression.c.The photograph, along with others like it, were taken by Dorothea Lange.d.This photograph is particularly famous because it was one of the first times a woman had been photographed in a naturalistic setting, for public viewing. Will give brainlist please dont put answers that are not related answer only if you know it pls and thank you Luther is a counseling graduate student working on his conference presentation in which he argues that a certain theoretical perspective on personality is outdated because its concepts are difficult to test, and its theory was based on a biased, nonrepresentative sample. Luther could also include the following criticism:psychoanalysis ignores the current experience. To secure a 500-meter radio tower against high winds,guy wires are attached to the top of the tower. Each wireforms a 15 angle with the top of the tower. Find the lengthof the wire from the tower to its anchor in the ground. someone please help me with this question its my last one! When a 136 N bag of nails hangs motionless from a single vertical strand of rope, how much tension is exerted in the strand? Answer in units of N. embryonic development gives us insights into evolutionary relationships not obvious in adults. t / f 3. What would be the reason for becoming a co-sponsor of a bill? Construct a triangle with sidesequal to a and b and and having angle c included as the angle Name all 4 of Earths sphere and describe what they include. How did horizontal and vertical integration during the late nineteenth century affect companies in the united states?