what is the δhrxn for the cleavage of dimethyl ether using the bond energies approach?

Answers

Answer 1

The enthalpy change for the cleavage of dimethyl ether using the bond energies approach is 826 kJ/mol.

The cleavage of dimethyl ether (CH3OCH3) can be represented by the following equation:

CH3OCH3(g) → CH3(g) + CH3O(g)

To calculate the enthalpy change of this reaction (ΔHr), we can use the bond energies approach. This approach involves calculating the sum of the energies required to break the bonds in the reactants and the sum of the energies released by the formation of bonds in the products.

The bond energies for the relevant bonds are:

C-H bond energy = 413 kJ/mol

C-O bond energy = 360 kJ/mol

O-H bond energy = 463 kJ/mol

Using these values, we can calculate the energy required to break the bonds in the reactants:

Reactants:

4 C-H bonds × 413 kJ/mol = 1652 kJ/mol

1 C-O bond × 360 kJ/mol = 360 kJ/mol

1 O-H bond × 463 kJ/mol = 463 kJ/mol

Total energy required to break bonds in the reactants = 2475 kJ/mol

We can also calculate the energy released by the formation of bonds in the products:

Products:

2 C-H bonds × 413 kJ/mol = 826 kJ/mol

1 C-O bond × 360 kJ/mol = 360 kJ/mol

1 O-H bond × 463 kJ/mol = 463 kJ/mol

Total energy released by the formation of bonds in the products = 1649 kJ/mol

Therefore, the net energy change for the reaction is:

ΔHr = (total energy required to break bonds in the reactants) - (total energy released by the formation of bonds in the products)

= 2475 kJ/mol - 1649 kJ/mol

= 826 kJ/mol

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Related Questions

Which of these levels of ecological organization includes the other three?

A. community
B.ecosystem
C.organism
D.population

Answers

Answer: B
Your answer would be ecosystem because ecosystem is all the living things in an area interacting with all of the abiotic parts of the environment.

Which is a liquid that is used to absorb and release thermal energy?

coolant
lubricant
grease
fuel

Answers

Answer

grese

Explanation:

Any liquid could absorb and release thermal energy. However, a refrigerant or a coolant absorbs heat and releases it to any area faster than any ordinary liquid such as water. So to complete the sentence: A refrigerant/cooler is a liquid that absorbs and releases thermal energy

Answer:

The correct answer is coolant.

Hope it helps. :)

it is the combination of the uppermost mantle and the crust​

Answers

Answer:

lithosphere

Explanation:

constrast a mixture and a compound , how are. they different?​

Answers

Answer:

A mixture is composed of two or more elements or compounds in a non-fixed ratio, which means you can vary the amount of substance in a mixture. A compound is composed of two or more elements in a fixed ratio, so you cannot vary the amount of each element in a compound

Answer:

mixture retains property of combing substances while compound has new properties that are different from combing elements...

can be separated by physical means whereas compounds can be separated by chemical or electrochemical methods

Define the terms Genotype and Phenotype.

Answers

genotype: genetics of a individual organism

phenotype: the set of observable (physical) characteristics of an individual resulting from the interaction of its genotype with the environment.

Answer:

A genotype refers to the genetic characteristics of an organism. A phenotype refers to the physical characteristics.

Please help it’s already overdue

Answers

Answer:

no se amigo esquema no entiendo ingles

How are plant and animal cells similar? How are they different? To answer these questions, make a list of the different organelles in each cell. Explain how each organelle is vital to the life and function of a plant or animal.

Answers

Answer:

A plant cell contains a large, singular vacuole that is used for storage and maintaining the shape of the cell. In contrast, animal cells have many, smaller vacuoles. Plant cells have a cell wall, as well as a cell membrane. In plants, the cell wall surrounds the cell membrane.

The heat to drive Earth's convection cells comes from...

A. the Earth's crust.

B. the Earth's mantle.

C. the Earth's core.

D. the sun.

Answers

Answer:

the sun im not 100% sure but yes

Answer:

B. The Mantle

Explanation:

The mantle is the part of the earth that has convection currents.

Which of the following statements are true of groups on the periodic table?

Check all that apply.

A. Elements in a group have the same number of protons.
B. Elements in a group have the same number of electron shells.
C. Elements in a group have similar properties.
D. Elements in a group have the same number of neutrons.

Answers

Answer: it’s only c

Explanation:

The correct statement regarding groups on the periodic table is statement C which is elements in a group have similar properties.

A. Elements in a group may have different numbers of protons, as the group represents elements with similar valence electron configurations, but the number of protons in the nucleus can vary.

B. Elements in a group do not have the same number of electron shells. Elements within the same group have similar outer electron configurations, which determine their chemical properties. The number of electron shells increases as you go down the group.

C. Elements in a group have similar properties. Elements within the same group share similar chemical behavior due to their similar outer electron configurations. This similarity leads to recurring patterns in their physical and chemical properties.

D. Elements in a group may have different numbers of neutrons. The number of neutrons can vary within a group as different isotopes of an element can exist, which have the same number of protons but different numbers of neutrons.

Therefore, the correct option is option c

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what waves are utilized to sterilize medical equipment?
a. Gamma
b. X-ray
c. Ultraviolet
d. Radio

Answers

Answer:

B-Gamma

Explanation:

Why is salad dressing a solution?

Answers

Explanation:

A prime illustration of sour salad dressing formulas and suspension. Vinegar is also an acetic acid product which is dispersed in water, so we can't even see molecules in the oil. The removal throughout the liquid phase to make a solution.

4. Describe the movement of the water molecules at cold temperatures.

Answers

Answer:

Point out to students that molecules of hot water are moving faster and are slightly further apart. The molecules of cold water are moving slower and are a little closer together. If students do not notice a difference, move the slider all the way to the left again and then quickly to the right.

2. How do molecules move in cold water?

Compare the speed of molecules in hot water compared to molecules in cold water? Water molecules move faster in hot water and slower in cold water. water molecules in cold, room temperature, and hot water. most of the liquid.

Which phrase best describes the water cycle?

The physical processes that move water through the atmosphere

The interconnected, continuous processes that move water through Earth's spheres

Water changing from liquid to gas and back to liquid

The chemical components that make up water

Answers

Answer:

I think option B , bcz it is continuous process

The continuous, interconnected processes that move water through Earth's spheres best describe the water cycle. Therefore, option B is correct.

What is the water cycle?

The water cycle can be demonstrated as the continuous movement of water from the Earth's surface to clouds and from clouds to the back surface. The sun, air, and other factors are included in the physical process of the water cycle, water goes through each of the states of matter such as solid, liquid, as well as gas.

The water cycle is a combination of the physical processes where water evaporates from the earth's surface into the atmosphere, cools down, condenses produces rain in clouds, and again comes back to the surface of the earth with the precipitation process.

Water on the Earth's surface of the water after rain gets collected in the form of rivers, groundwater,  ponds, etc., and combines in oceans and gets evaporated.

The evaporation process includes the exchange of water from the surface in the form of water vapors to the atmosphere. The process of evaporation cools the temperature of the atmosphere as the sunlight on the surface of the earth makes the warm.

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CLAIM: What is one strategy animals use to take care of their offspring and to ensure successful reproduction? EVIDENCE: List two examples of animals that use this strategy. REASONING: Explain how this strategy increases the probability that offspring will survive.

Answers

Answer:

alligators protect their offspring by digging a hole where they bury their eggs and stay all the meanwhile on top of the hole protecting their offspring. baby alligators can be eaten by birds and snakes. they for short periods of time take a break to hunt for food. when their hatchling hatch they keep them in their mouth until they're in the water. alligators are good protecting their offspring.

seahorses make the males take care of their baby's till they are born and male seahorses join together in groups to help protect eachother. once the babies are born male seahorses are still together helping raise their pups

Alligators bury their eggs in a hole that they have dug, and they then spend the entire time on top of the hole guarding their young. Therefore, by below given ways animals take care of their offspring.

What is offspring?

Offspring refers to the new organism that an organism creates via the act of reproduction. Both birds and snakes can consume young alligators. They stop for brief periods of time to go food hunting. They hold their hatchlings in their mouths until they are in the water after they hatch. Alligators do a superb job of safeguarding their young.

Male seahorses form groups to assist defend one another, and they are required to care for their young until they are born. Male seahorses continue to work together to nurture their young after the babies are born.

Therefore, by above ways animals take care of their offspring.

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how many moles of oxygen gas are produced in the decomposition of 5.00g of potassium chlorate?
Given: KClO3= O2+KCl

Answers

Answer:

0.0612 moles of O2 produced

Explanation:

     First we convert from grams of Potassium Chlorate to moles..

Amu = 122.5

5.00g / 122.5 g = 0.0408163265 moles of Potassium Chlorate

    Now we need to use the chemical equation to find the ratio of Potassium Chlorate to Oxygen... But first, we need to balance it

Original Chemical Equation : KClO3 = O2 + KCl

Balanced Chemical Equation : 2KClO3 = 3O2 + 2KCl

     Now we will use the balanced chemical equation to find the ratio of Potassium Chlorate to oxygen (in order to convert to moles of oxygen for our answer)

We can see that for every 2 moles of Potassium Chlorate that are decomposing, we have 3 moles of oxygen gas produced.

So, we will set up our conversion factor like this:

0.0408163265 moles KClO3 *   3 moles Oxygen

                                                     -------------------------

                                                     2 moles KClO3

When we solve for this, we see that there are 0.0612244898 moles of O2 produced, or 0.0612 moles of O2 produced

describe nuclear change please​

Answers

Answer: Nuclear change is distinct from chemical change in that elements change. In the nuclear change the elements can change from one to another. (Nuclei can break apart to form smaller elements.)

Explanation:

Answer:

A nuclear change is a process by which nuclei of certain isotopes change spontaneously or are forced to change to two or more different isotopes.

Explanation:

The three main types of nuclear change in the matter are radioactive natural disintegration, nuclear fission, and nuclear fusion.

I like blowing up stuff too

A passenger elevator travels from the first floor to the 60th floor, a distance of 210 m, in 35s. What is the elevator’s speed?

Answers

Answer:6m per second

Explanation:

How are molecules arranged in solid ,liquid and gas?

Answers

Answer:

A solid has the molecules tightly packed together and are held in a fixed pattern.

A liquid has molecules that are packed together in a random fashion and can move freely.

A gas has molecules that are widely separated and randomly move and collide.

Explanation:

Which [H+] value describes a neutral solution?

10−7 M


10−14 M


10−1 M


10−12 M

Answers

Answer:

[tex]10^{-7} m[/tex]

Explanation: just took the test; picture below:)

A solution is defined as a homogeneous mixture made up of two or more non-reacting substances. The [H⁺] for a neutral solution is 10⁻⁷ M . The correct option is A.

What is a neutral solution?

A solution which is neither acidic nor basic and contains equal amount of hydrogen ion and hydroxide ion concentration. The distilled water is an best example of a neutral solution. It always has a pH 7.

The pH of a solution is defined as the negative logarithm of hydronium ion concentration in moles per litre. It can be given as:

pH = - log [H₃O⁺]

For pure water or neutral solution at 298 K

[H₃O⁺] = [OH⁻] = 1 × 10⁻⁷ mol L⁻¹

The pH of acidic solution is more than 7 and for basic solution the pH will be greater than 7.

Thus the correct option is A - 10⁻⁷ M .

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4.Which scientist described the electrons as traveling in certain orbits or energy levels?

a.Dalton
b.Rutherford
c.Thomson
d.Bohr



5.In a famous experiment, scientists bombarded a very thin gold (Au) foil with positively charged alpha particles. They found that most of the alpha particles passed right through the Au foil. However, a few of the alpha particles were deflected or bounced back toward the source. How did these scientists explain their results?

a.Negative charges are spread throughout the atom.
b.Negative charges are located in the tiny nucleus of the atom.
c.Positive charges are located in the tiny nucleus of the atom.
d.Positive charges are spread throughout the atom.



6.The atomic mass represents the weighted average of an element’s

a.Ions
b.mass numbers
c.atomic numbers
d.isotopes



7.The number of protons is represented by the element’s

a.atomic number
b.mass number
c.atomic mass
d.isotope



8.The number of protons plus neutrons is represented by the

a.atomic number
b.mass number
c.atomic mass
d.isotope



9.How many valence electrons would an atom of Chlorine have?

a.2
b.3
c.7
d.8



10.An element is found to have 2 electrons in the 3rd energy level. What is this element?

a.Boron
b.Magnesium
c.Fluorine
d.Argon



11.Which shows the order of decreasing atomic size?

a.Si, Al, Mg, Na
b.I, Br, Cl, F
c.Be, Mg, Ca, Sr
d.C, P, Se, I



12.Which of the following elements has the highest ionization energy and why?

a.Argon because it has more protons in the nucleus.
b.Argon because it has a full valence shell.
c.Chlorine because it only needs one valence electron to fill its valence shell.
d.Chlorine because it attracts electrons better.



13.Which shows the order of increasing ionization energy?

a.Si, Al, Mg, Na
b.Ga, Ge, As, Se
c.Be, Mg, Ca, Sr
d.F, Cl, Br, I



14.Identify the reason why atoms decrease in size(atomic radius)across a period on the Periodic Table.

a.Gravity pulls the electrons in towards the nucleus.
b.Increase in energy levels increases the attraction and thus pulls electron cloud in.
c.Increasing strong positive nuclear charge from the nucleus pulls in the negative electron clouds and increases with the increase in protons and electrons.
d.Electrons lose energy and collapse with an increasing number of electrons and protons.



15.What is the shielding effect?

a.The neutrons shield protons from the attraction of the electrons from the first energy level.
b.Valence electrons are shared equally between atoms.
c.The repulsion of electrons in the same energy level.
d.The inner-core electrons shield outer-core electrons from the attraction to the atom’s nucleus.



16.Which statement is an accurate description of elements from Period 3 on the periodic table?

a.It contains elements with the same number of 3 protons.
b.It contains elements with the same number of3valence electrons.
c.It contains elements with the outermost protons in the same 3rd energy level.
d.It contains elements with the outermost electrons in the same 3rd energy level.



17.The column that an element is located in tells us

a.the total number of valence electrons an atom has.
b.the total number of energy levels an atom of that element has.
c.the highest energy level an atom of that element has.
d.both b & c.



18.The Halogen family of elements all have 7 valence electrons. Which column would they be in?

a.01 (IA)
b.02 (IIA)
c.4 (IVA) or 14
d.7 (VIIA) or 17



19.The Alkali and Alkaline Earth metals belong to which columns, respectively?

a.Column IA & IIA
b.Column VIIA & Column VIIIA
c.Column IIIA & IVA



20.What do carbon and silicon have in common?

a.They belong to the same column (family), therefore they have the same number of valence electrons.
b.They belong to the same column (family), therefore they have the same number of total electrons.
c.They belong to the same column (family), therefore they have the same number of energy levels.
d.They belong to the same column (family), therefore they have the same number of protons.



21.Electromagnetic radiation can take the form of which of the following types of waves

a.Heat
b.Light
c.Ultraviolet
d.All of the above



24.In order to go to a lower energy orbit, an electron

a.Must disappear
b.Must combine with other electrons
c.Lose energy of a specific amount
d.Must be transferred to another atom



25.Please choose the correct sequence that describes the excitement of an atom.
1. Such an electron transition raises the atom from the ground state to the excited state.
2. When energy is added to an atom from an outside source, its electrons move to a higher energy level (orbit)
3. As a result, the atom emits a photon.
4. When the atom is in an excited state, the electron can drop from the higher energy level to a lower energy level.

a.1, 2, 3, 4
b.4, 3, 2, 1
c.2, 1, 4, 3
d.3, 4, 1, 2

Answers

Bohr is the scientist who described the electrons as traveling in certain orbits or energy levels

Will give brilliantiest!!
can energy produce more carbon dioxide?

Answers

different fuels emit different amounts of carbon dioxide in relation to the energy they produce when burned to analyze

Picture a neutral Satom. This neutral atom will have
valence electrons. To reach a more stable configuration, this atom will
(gain, lose) electrons. The charge of the ion that forms will be
ASAP PLEASEE

Answers

Answer:

it will have 6 valence electrons

it will gain electrons

charge will be 2-

if an element number has a mass number of 244 and an atomic number of 94, how many neutrons does the element have

Answers

94 neutrons
The atomic number and the proton and electron numbers are the same.

How many atoms of aluminum (Al) are in 6.98 mol of aluminum?​

Answers

Answer:

[tex]\boxed {\boxed {\sf 4.20 *10^{24} \ atoms \ Al }}[/tex]

Explanation:

To convert from moles to atoms, we must us Avogadro's number: 6.022*10²³. This tells us the number of particles (atoms, molecules, etc.) in 1 mole of a substance. In this case, it is atoms of aluminum.

We can use the number as a fraction.

[tex]\frac{6.022*10^{23} atoms \ Al}{1 \ mol \ Al}[/tex]

Multiply by the given number of moles: 6.98

[tex]6.98 \ mol \ Al *\frac{6.022*10^{23} atoms \ Al}{1 \ mol \ Al}[/tex]

The moles of aluminum will cancel.

[tex]6.98 *\frac{6.022*10^{23} atoms \ Al}{1 }[/tex]

The denominator of 1 can be ignored.

[tex]6.98 * {6.022*10^{23} atoms \ Al}[/tex]

Multiply.

[tex]4.203356*10^{24} \ atoms \ Al[/tex]

The original measurement of moles has 3 significant figures, so our answer must have the same.

For the number we calculated, that is the hundredth place. The 3 in the thousandth place tells us to leave the 0.

[tex]4.20 *10^{24} \ atoms \ Al[/tex]

There are about 4.20*10²⁴ atoms of aluminum in 6.98 moles.

At what power of ten does the entire solar system come into view

Answers

Answer: 10,000,000,000 kilometers

Explanation:

All the planets in our solar system come into view. But at this distance, only Jupiter and Saturn would be visible with the naked eye.

What is the atomic radius
of mercury?

Answers

The answer is 155 pm, hope this helps!

Which layer of the ocean is the least dense?

Question 4 options:

they are all the same


middle layer


closest to the ocean floor


closest to the surface

Answers

Answer:

the deep ocean

Explanation:

goog   le

The layer which is closest to the surface is least dense.

What are the layers of ocean?

The ocean can be divided into three main layers:

The surface layer (also known as the epipelagic zone), which extends from the surface to about 200 meters deep and is the warmest and lightest layer.

The mesopelagic zone (or twilight zone), which extends from 200 to 1000 meters deep and is characterized by limited light and declining temperatures.

The bathypelagic zone (or midnight zone), which extends from 1000 to 4000 meters deep and is the coldest, darkest, and most pressure-filled layer.

Below the bathypelagic zone lies the abyssopelagic zone, which extends from 4000 to the ocean floor and is characterized by near-constant darkness and extremely cold temperatures.

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Determine whether each item is an example of preservation or conservation. Yellowstone National Park Mining regulations No-fly zones Endangered Species Act Captive-breeding programs Big Cypress National Preserve

Answers

Answer:

Yellowstone National park-preservation  

Mining Regulations- conservation.

Captive Breeding programs-  conservation  

Big Cypress National preserve-Preservation

No Fly zones  conservation

Endangered species act- preservation

Explanation:

Conservation seeks the proper use of nature, while preservation seeks protection of nature from use.

The example of the preservevation or conservation are :

Yellowstone National park - preservation  mining rules - conservation.captive programs-  conservation  cypress preserve - Preservationno Fly zones - conservation.endangered species act - preservationWhat is the difference between preservation and conservation?

Preservation is the action of preserving something such as to protect or to keep alive something parks are meant for preservation purposes. Conservation is a wasteful use of resources. Conservation includes the preservation of natural resources.

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Name the acid and the base from which the salt calcium sulphate is formed. also write the

balanced chemical equation for the chemical reaction​

Answers

Answer:

Calcium Carbonate base and Sulphuric acid.

CaCO3 and H2SO4

Answer:

Skeletal equation : Ca(OH)2 + H2SO4 ----> CaSO4 + H2O

Balanced equation : Ca(OH)2 + H2SO4 ---> CaSO4 + 2H2O

Hope it helps

Is the reaction balanced?

Answers

Answer:

No

Explanation:

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The company doesn't want to manage database patches. which of the actions would cause the molecules of a gas to get closer together? Bill is playing a game of chance of the school fair He must spin each of these 2 spinnersIf the sum of these numbers is an even number, he wins a prize.What is the probability of Bill winning?What is the probability of Bill spinning a sum greater than 15? When given a set of cards laying face down that spell M, A, T, H, I, S, F, U, N, determine the probability of randomly drawing a vowel. three tenths three sixths one ninth one third how are superman and lois genetically compatible B. Answer the question.How is living in space different from living on Earth? Draw structures for the alkene (or alkenes) that gives the following reaction product. Br Br2 2123 Br You do not have to consider stereochemistry . 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Ordinarily, there's value in implementing all of a class' member functions in one source file, but we'd only like you to submit these two functions in /problem1.cpp, so we'll need them in a separate file.)Additionally, add comments above each of these functions in your /problem1.cpp file that specify the asymptotic notation that best indicates how long they would take to run on an ArrayList whose size is n and whose capacity is c, along with a brief description a sentence or two is fine of why.// ArrayList.hpp#ifndef ARRAYLIST_HPP#define ARRAYLIST_HPP#includeclass ArrayList{public:ArrayList();ArrayList(const ArrayList& a);~ArrayList();ArrayList& operator=(const ArrayList& a);std::string& at(unsigned int index);const std::string& at(unsigned int index) const;void add(const std::string& s);unsigned int size() const;unsigned int capacity() const;private:std::string* items;unsigned int sz;unsigned int cap;};#endif // ARRAYLIST_HPP********************************************************************************************************************************// ArrayList.cpp#include "ArrayList.hpp"namespace{const unsigned int initialCapacity = 10;void arrayCopy(std::string* target, std::string* source, unsigned int size){for (unsigned int i = 0; i < size; i++){target[i] = source[i];}}}ArrayList::ArrayList(): items{new std::string[initialCapacity]}, sz{0}, cap{initialCapacity}{// std::cout Consider the following system at equilibrium where Kc = 9.5210-2 and H = 18.8 kJ/mol at 350 K. 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The preschool also has a director More Info In addition to the salary expense, the preschool must pay federal payroll taxes (FICA taxes) in the amount of 765% of salary expense. The preschool leases its facilities from a local church, paying $4,020 every month it operates. Fixed operating expenses (telephone, internet access, bookkeeping services, and so forth) amount to $900 per month over the eight-month school year. Variable monthly expenses (over the eight-month school year) for art supplies and other miscellaneous supplies are $6 per child. Revenue for the entire eight-month school year from tuition, registration fees, and the lunch program is projected to be $241,200 Print Done Requirement 1. Prepare Greatland Preschool's monthly operating budget. Round all amounts to the nearest dollar. (Round amounts to the nearest dollar.) Greatland Preschool Budgeted Monthly Operating Expenses Teachers' salary: 432 2-day program 654 3-day program 872 4-day program 1045 5-day program 1,550 Director salary 4553 Total salary expense 348 Payroll tax expense 4,020 Lease expense 900 Fixed operating expenses 1,080 Variable oneratina exnenses Enter any number in the edit fields and then click Check Answer. Which of these is the main idea of the Social Gospel Movement? Do people behave well and refrain from hurting others or committing crimes only becausethey are afraid of getting caught? Use the following table to determine whether or not there is a significant difference between the average hourly wages at two manufacturing companies.Manufacture 1 Manufacturer 2n1 = 81 n2 = 64x1=$15.80 x2=$15.001 = $3.00 2 = $2.25What is the test statistic for the difference between the means? An experiment was conducted to determine the effectiveness of a method designed to remove oil wastes found in soil. Three contaminated soil samples were treated. After 95 days, the percentage of contamination removed from each soil sample was measured, with a mean of 49. 3 percent and a standard deviation of 1. 5 percent. If we wished to narrow the boundary around for a 98 percent confidence interval to within. 5 percent, how many soil samples should be in our experiment? Suppose a random variable X has density functionf(x) = {cx^-4, if x1{0, else.where c is a constant.a) What must be the value of c?b) Find P(.5 Compare how the narrator explicitly reveals his attitude about his culture identity versus his parents attitudes that are revealed impalicity. Todd Mountain Development Corporation is expected to pay a dividend of $3 in the upcoming year. Dividends are expected to grow at the rate of 10% per year. The risk-free rate of return is 4%, and the expected return on the market portfolio is 19%. The stock of Todd Mountain Development Corporation has a beta of 0.65. Using the constant-growth DDM, the intrinsic value of the stock is _________.