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

Answers

Answer 1

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 2

Answer:

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

Explanation:


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need help asap please

Answers

I doiont know tbh

Explanation:

a government agency recommends that the amount of arsenic in drinking water should not be above 0.01 ppm. at this concentration, how many grams of arsenic would you expect to find dissolved in 1000 ml of pure water?

Answers

The formula for PPM  =100 /1,000,000=0.01 PPM = 100 / 1 , 000 , 000 = 0.01 . i.e concentrations of arsenic should be less than 0.01 *1000 therefore it should be less than 10 ml for 1000ml of water.

This stands for "parts per million" and can alternatively be written as mg/L (milligrams per liter). The mass of a chemical or contamination per volume of water is the unit of measurement here. On a lab report, ppm or mg/L both signify the same thing. It provides information about a substance's density when it is dissolved in water. Examples include total alkalinity, calcium hardness, and free chlorine. A substance has a PPM of 1 if it makes up one millionth of the entire amount of water.

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)the decomposition of dinitrogen pentoxide is described by the chemical equation2 n2o5(g) 4 no2(g) o2(g)if the rate of appearance of no2 is equal to 0.560 mol/min at a particular moment, what is the rateof appearance of o2 at that moment?2)a)0.280 mol/minb)1.12 mol/minc)2.24 mol/mind)0.140 mol/min

Answers

The rate of appearance of o2 at that moment is 2.80 mol/min.

Calculation :

Recall

aA+bB→ cC+dD

[tex]\frac{d[A]}{a.dt}[/tex] =  [tex]\frac{d[B]}{b.dt}[/tex] =  [tex]\frac{d[C]}{c.dt}[/tex]  =  [tex]\frac{d[D]}{d.dt}[/tex]

Then

[tex]\frac{d[NO_{2} ]}{2.dt}[/tex] =   [tex]\frac{d[NO_{2} ]}{4.dt}[/tex]

Replacing :

[tex]\frac{1.4}{2}[/tex] =   [tex]\frac{d[NO_{2} ]}{4.dt}[/tex]  .......   [tex]\frac{d[NO_{2} ]}{dt}[/tex] = 2.8

Degradation is the first step in the recycling of nutrients that an organism (plant or animal) uses to build its body. This is the process by which dead tissue is broken down and transformed into simpler organic forms.They are the food source for many species that underlie ecosystems.

Decomposition or putrefaction is the process by which dead organic matter breaks down into simple organic or inorganic matter such as carbon dioxide, water, simple sugars and inorganic salts. This process is part of the nutrient cycle and is essential for recycling the finite substances that occupy the physical space of the biosphere. An organism's body begins to decompose shortly after death. Animals such as earthworms also help break down organic matter.

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if the reaction yields 21.1l of nitrogen gas what mass of nan3 in grams would be required to produce this volume at stp?

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if the reaction yields 21.1l of nitrogen gas, 40.81g  mass of nan3 in grams would be required to produce this volume at stp

mass of NaN3 (g) = moles of NaN3 (ma) x molar mass of Na N3 (g/mol) = 0-678 mol 65 g/mol =40.81g. A chemical compound's molar mass is described as the weight of a sample of that chemical divided by the quantity of substance in that sample, which is the quantity of moles in that sample, evaluated in moles. The molar mass of a substance is a mass property, not a molecular property. It is the connection between pressure, volume, moles, and temperature. is the volume that one mole of the a chemical substance or a chemical compound takes up. As a result, at STP, the molar volume of a gas is 22.4 litres.

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what has very good electrical conductivity

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Many metals have very good electrical conductivity. This is because metals have a large number of free electrons in their outermost energy levels, which are able to move freely through the metal's structure. This allows metals to easily conduct electric current.

Some examples of metals with very good electrical conductivity include copper, silver, and gold. These metals are often used in electrical wiring and other applications where good conductivity is important.

In addition to metals, other materials can also have very good electrical conductivity. For example, some electrolytes, such as certain solutions of salts, can conduct electricity very well. This is because electrolytes contain ions that are able to move freely through the solution, allowing electric current to flow.

Overall, materials with good electrical conductivity have a high number of free electrons or ions that are able to move freely through the material, allowing electric current to flow easily.

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What mass of water is produced when 5.0 mol o2 is produced by this reaction?

Answers

Answer:

39.0

Explanation:

sulfur hexafluoride gas is collected at in an evacuated flask with a measured volume of . when all the gas has been collected, the pressure in the flask is measured to be . calculate the mass and number of moles of sulfur hexafluoride gas that were collected. be sure your answer has the correct number of significant digits.

Answers

Sulfur hexafluoride gas has a mass of 2.8 g and a molecular weight of 0.019 when it is collected at in an evacuated flask with volume of 5.0L

To calculate the moles of sulfur hexafluoride gas, we use the equation given by ideal gas: PV =nRT

Given Pressure of sulfur hexafluoride (P) = 0.090 atm

Volume of the sulfur hexafluoride gas (V) = 5.0 L

Gas constant (R) = 0.0821

Temperature of sulfur hexafluoride gas (T) = 14C+273 = 287K

n = PV/RT = 0.090x5/0.0821x287 = 0.019mol

To calculate mass n = given mass/Molar mass

Molar mass of sulfur hexafluoride = 146.0 g/mol

mass = nxM = 0.019x146 = 2.8g

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complete question: Sulfur hexafluoride gas is collected at 14.0°C in an evacuated flask with a measured volume of 5.0L. When all the gas has been collected, the pressure in the flask is measured to be 0.090atm . Calculate the mass and number of moles of sulfur hexafluoride gas that were collected. Be sure your answer has the correct number of significant digits.

what atomic or hybrid orbitals make up the sigma bond between and in acetic acid, ? ( is the second carbon in the structure as written. is the first oxygen in the structure as written.) orbital on orbital on what is the approximate bond angle? angle

Answers

(a) sp2- hybrid orbital of C1 and p-orbital of O1 , because, central atom i.e. carbon has sp2-hybridization and in surrounded oxygen atom last electrons enters in p-orbital. (b) 1200 bond angle, because shape is trigonal planar.

Atomic orbitals are generally specific through a mixture of numerals and letters that constitute precise residences of the electrons related to the orbitals—for example, 1s, 2p, 3d, 4f. The numerals, referred to as primary quantum numbers, imply strength degrees in addition to relative distance from the nucleus. The simple names s orbital, p orbital, d orbital, and f orbital refer to orbitals with angular momentum quantum number ℓ = 0, 1, 2, and 3 respectively.

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identify the initial and final states if an electron in hydrogen emits a photon with a wavelength of 656 nm .

Answers

The initial and final states if an electron in hydrogen emits a photon with a wavelength of 656 nm  is n = 3 to n = 2.

given that :

wavelength of the photon emitted λ = 656 nm = 656 × 10⁻⁹ m

the energy of the photon is given as :

E = hc / λ

  = (6.626 × 10⁻³⁴ × 3 ×10⁸ ) / 656 × 10⁻⁹

  = 3 × 10⁻¹⁹ J  = 1.9 eV

En = - 13.6 / n² eV

where n = 1,2,3 ....

1) n = 2 to n = 1

E2 - E1 = - 13.6 eV ( 1 / 4 - 1/ 1)

           = 10.2 eV

2) n = 3 to n = 2

E3 - E2 = -13.6 eV ( 1/3² - 1/ 2² )

            = 1.9 eV

Thus the initial and the final states are n = 3 to n = 2.

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from your observations in step 7, what can you conclude about the relative equilibrium concentrations of cro42- (aq) ion in each of the solutions 0.1 m k2cr2o7 and 0.1 m k2cro4 before the ba(no3)2 solution is added?

Answers

Chromate anion is basically situated in the chromate salt. These oxoanions also possess the property of the oxidizing agent. The presence of chromate and dichromate anions results in chemical equilibrium. It is commercially used to prevent corrosion.This is because of Le Chatelier's Principle.

According to the Le Chatelier principle, when a dynamic equilibrium system is perturbed by a change in, say, pressure, temperature, or the concentration of products or reactants, the equilibrium will shift in the opposite direction to make up for the disturbance.

To further grasp this idea, consider the following example:

in the case of an equilibrium general reaction:

A (g) + B (g) <=> C (g) + D (g) (g) ΔH < 0 (it denotes an exothermic process) (it means an exothermic reaction)

The following is an example of this reaction:

A (g) + B (g) <=> Energy is released when an exothermic reaction occurs between C and D.

If the temperature increases or heat is added, the equilibrium will shift to the left because of the principle.

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what is the maximum amount of flammable liquids that can be stored outside of a rated flammable cabinet in a laboratory?

Answers

The maximum amount of flammable liquids that can be stored outside of a rated flammable cabinet in a laboratory is 25 number of gallons.

To make certain flammable drinks are remoted from incompatible substances, they need to simplest be saved in a flammable cupboard this is used simplest for the garage of Class three Flammable Liquids. Extra care should be taken now no longer to take flammable drinks into regions of the laboratory which are the usage of incompatible substances.

The most quantity of flammable drinks that you could save in a single flammable cupboard is primarily based totally at the chemical's Flash Point and Boiling Point. No extra than 60 gallons of a Category 1, 2 or three flammable liquid or a hundred and twenty gallons of a Category four flammable liquid can be saved in a Flammable Safety Cabinet.No extra than 25 gallons of flammable drinks will be saved in a room outdoor of an permitted garage cupboard.

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the provider has ordered an i.v. of 5% dextrose in lactated ringer's solution at 125 ml/hr. the i.v. tubing delivers 10 gtt/ml. how many gtt/min should fall into the drip chamber?

Answers

The amount of gtt/min that should fall into the drip chamber is given as follows:

20.8.

How to find the amount of gtt/min that should fall into the chamber?

The amount of gtt/min that should fall into the chamber is found applying the proportions considering the amounts given in the problem.

The provider has ordered an i.v. of 5% dextrose in lactated ringer's solution at 125 ml/hr, and the i.v. tubing delivers 10 gtt/ml, hence the amount of gtt per hour is obtained as follows:

gtt/hr = 125 x 10 = 1250.

An hour is composed by 60 minutes, hence, applying this proportion, the amount of gtt/min that should fall into the drip chamber is calculated as follows:

gtt/min = 1250/60 = 20.8.

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the natural abundance of calcium in the earth's crust is 3.4% by mass. how many calcium atoms are present in a 1.50 g sample of the earth's crust?

Answers

If calcium makes up 3.4% by mass of Earth's crust, the grams of calcium present if a sample of Earth's crust has a mass of 1.5 g is 0.051 g.

How to calculate mass?

The mass of an element in a sample can be calculated by multiplying the percent abundance of that element by the mass of sample.

According to this question, calcium makes up 3.4% by mass of Earth's crust. If a sample of Earth's crust has a mass of 1.5 g, the mass of calcium present can be calculated as follows:

mass of calcium = 3.4/100 × 1.5 g

mass of calcium = 0.051 g

Therefore, if calcium makes up 3.4% by mass of Earth's crust, the grams of calcium present if a sample of earths crust has a mass of 1.5 g is 0.051 g.

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Which statement could be a specific theory

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An explanation of a hypothesis that has been repeatedly tested in experiments and found to be correct is referred to be a scientific theory.

What is specific theory?

Specific theory is defined as the theories that are limited to certain populations or specific sectors of practice, that concentrate on specific nursing phenomena, and that reflect clinical experience.

'A scientific theory is a well-supported explanation of some part of the natural world, based on a body of facts that have been repeatedly proven via observation and experimentation,' according to the Oxford Dictionary.

Thus, an explanation of a hypothesis that has been repeatedly tested in experiments and found to be correct is referred to be a scientific theory.

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what is the difference between an ore vein and a disseminated deposit? which ones are easier to mine?

Answers

Ore veins and disseminated deposits are  differ in terms of their size, shape, and distribution.

An ore vein is a large, continuous body of mineral deposits that are typically found in fractures or voids in rock formations. Ore veins are typically formed when minerals that are dissolved in water fill a void or crack in a rock formation. Ore veins are typically quite large and can be several meters in width and several kilometers in length. They are also typically found at depths of several hundred meters or more. Ore veins are generally easier to mine because they are more concentrated and can be more easily accessed through underground mining methods.

A disseminated deposit, on the other hand, is a type of mineral deposit that is dispersed or scattered throughout a larger rock formation. Disseminated deposits are usually smaller and less concentrated than ore veins and are typically found at shallower depths. They are often harder to mine because the minerals are not as concentrated and are more dispersed throughout the rock formation

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how many moles of chloride ions are there in a mixture of 2mol of barium chloride and 1 mol of pottassium chloride

Answers

The chloride ions  in a mixture of 2mol of barium chloride and 1 mol of potassium chloride are 3 moles

What is Barium chloride?

Generally, Barium chloride is an inorganic compound with the formula BaCl2. It is a white solid that is highly soluble in water. It is commonly used as a test for detecting the presence of sulfates in a solution and as a precursor to other barium compounds. Barium chloride is toxic if ingested, so it should be handled with caution.

There are a total of 3 moles of chloride ions in the mixture of 2 moles of barium chloride and 1 mole of potassium chloride.

Barium chloride contains 2 moles of chloride ions, and potassium chloride contains 1 mole of chloride ions, for a total of 2 + 1 = 3 moles of chloride ions.

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A 2-kg object is moving horizontally with a speed of 4 m/s. How much net force is required to keep the object moving bat this speed and in this direction? Explain.

Answers

Answer: 8N (8 kg/ms")

Explanation: F= M*A

F= (2KG)*(4/MS") = 8N

How does the solubility of a gas in a solvent depend on pressure and temperature?

Answers

The solubility of a gas is directly proportional to the pressure and proportional to the temperature.

As we increase the pressure of a gas its collision frequency increases hence solubility increases as we decreases the pressure the solubility decreases. Collision frequency is defined as the collision of atoms on increasing pressure atoms start moving from one place to another. The relationship pressure is linear with solubility. It is defined by Henry's law.

The effect of temperature depends on the nature of solute and solvent.

Basically, as we increase the temperature in gas phase solubility also increases.

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which type of substance is fast acting, either immediately suffocating the victim or causing massive burning?

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Substance is fast acting, either immediately suffocating the victim or causing massive burning is chemical weapons.

Chemicals used to intentionally kill or damage people through their poisonous qualities are known as chemical weapons. Chemical weapons also include weapons, apparatus, and other gear made expressly for turning hazardous substances into weapons.

What chemical weapon has the highest lethality?

What VX is VX is a nerve toxin that was created by humans for use in chemical warfare. The most dangerous and quickly acting of the known chemical warfare agents are nerve agents.

Basically, these weapons were just common munitions like grenades and artillery rounds that had well-known industrial chemicals added to them. Among the chemicals employed were chlorine, mustard gas, which causes terrible skin burns, and phosgene, a choking toxin.

The most critical effects are paralysis of the respiratory muscles and inhibition of the respiratory center. Ultimately, death results due to respiratory paralysis. If the concentration of the nerve agent is high, death is immediate.

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When the dry ingredients of a cake are combined, what is the result?
atom
compound
mixture
element

Answers

When the dry ingredients of a cake are combined, the result is a mixture. Option 3.

What are mixtures?

In chemistry, mixtures are substances that are obtained by mixing two or more chemically different substances together with each substance maintaining its chemical identity. In other words, the components of a mixture are still chemically unique and can be separated by physical means.

Mixtures can be homogeneous or heterogeneous. Homogenous mixtures are mixtures in which the components are uniformly dispersed throughout the entire mixture. For heterogeneous mixtures, the components are not uniform throughout the mixture.

Thus, when the dry ingredients of a cake, such as flour, sugar, etc., are combined, what we are going to have is a mixture. Whether this mixture would be homogenous or heterogeneous will depend on the level of mixing. Whatever the case may be, the components can still be separated by physical means.

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when preparing sequencing-reaction tubes, each of the four dntps are added, but just one kind of ddntp. which are used in the highest concentrations, the dntps or the ddntps, and why?

Answers

Because ddNTPs are only intended to be added occasionally to ensure that strands of all lengths are produced, dNTPs are used at the highest concentrations in sequencing reactions.

The DNA sequencing response consists of four major ingredients: "Template" Genetic material copied by E. coli; free bases, this same four types of DNA building blocks; short dna called "primers"; and Enzyme dna, the enzyme which copies DNA. The reaction is began by heating the two dna strands till the they separate. The template then anneals/binds towards its intended location, and DNA polymerase begins elongating it. If expected to complete, a fresh dna strand would be formed. A nucleoside triphosphate contains a trna molecule bound to a 5-carbon sugar with phosphate groups bound to the sugar. They are the single - molecule forerunner of both DNA and RNA, that are chains of nucleotides formed during the DNA replication process.

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What is the IUPAC name for the compound N₂O3?

Answers

Answer: Dinitrogen trioxide

Explanation:

Balance the chemical equation below using the smallest possible whole number stoichiometric coefficients.
N₂(g) + H₂(g) → NH3(g)

Answers

Hello,

I hope you and your family are staying safe and healthy!

To balance this chemical equation, we need to make sure that there is the same number of atoms of each element on both sides of the arrow.

We can start by looking at the nitrogen atoms. There is one nitrogen atom on the left side of the arrow, but there are two nitrogen atoms on the right side of the arrow. To balance the equation, we can add a coefficient of 2 in front of N₂ on the left side of the arrow:

2N₂(g) + H₂(g) → NH3(g)

Next, we can look at the hydrogen atoms. There are two hydrogen atoms on the left side of the arrow, but there is only one hydrogen atom on the right side of the arrow. To balance the equation, we can add a coefficient of 3 in front of NH3 on the right side of the arrow:

2N₂(g) + H₂(g) → 3NH3(g)

Now the equation is balanced, with two nitrogen atoms and two hydrogen atoms on each side of the arrow. The smallest possible whole number stoichiometric coefficients are 2 for N₂ and 3 for NH3.

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cluster decay is a type of radioactivity like alpha decay, except instead of spitting out a helium nucleus, it expels something bigger. what is the atom resulting from uranium-235 (u) emitting a magnesium-28 (mg) nucleus? (write your answer in the standard u-235 format.)

Answers

A radioactive atom emits a cluster of neutrons and protons-235  heavier than an alpha particle in a process known as cluster decay.

Cluster decay, also known as heavy particle radioactivity or heavy ion radioactivity, is a very uncommon form of nuclear decay in which an atomic nucleus generates a small "cluster" of neutrons and protons, more than in an alpha particle but less than a typical binary fission fragment. The cluster size is also produced by ternary fission into three fragments. When the parent nucleus loses protons, it becomes the daughter nucleus, which has an atomic number Zd = Z + Ze and a mass number Ad = A Ae, where Ae = Ne + Ze. [1] For instance

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what is the difference between atomic mass and atomic number? To know the answer, let’s look at some key differences below.

Answers

Answer: Atomic mass is associated with the number of neutrons and protons that are present in a particular nucleus of an element. Atomic number is usually the number of protons present in an element's nucleus

If you want to find the number of protons and electrons you look at the atomic number. If you want to find the number of neutrons you need to subtract the atomic number from the mass. If the mass have something like 35.453 the mass will be 35. But if it's like 10.811 the mass will be 11 because if the number after the decimal is five or higher then the number before the decimal will go up one.

Explanation:

rank the speed of sound in the following substances from slowest to fastest: steel 25°C air, 50°C air, and water. defend your predictions using the kinetic theory of matter.

Answers

The speed of sound in given substances from slowest to fastest: 25°C air, 50°C air, water, steel.

What are sound waves?

Sound can transmit through liquids, gases, solids, and plasma as longitudinal waves, these are also known as compression waves. Sound waves need a medium to travel so they can be propagated through solids as longitudinal and transverse waves.

Longitudinal sound waves exhibit alternating pressure deviations leading to compression and rarefaction, while transverse waves exhibit alternating shear stress perpendicular to the propagation path.

Waves can cause matter to move up and down but can not carry along with them. As the temperature of the air increases the molecules start to vibrate faster eventually the speed of the sound increase.

The speed of sound is lowest in gases, faster in water, and fastest in steel (solid).

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which of the following is an intensive property? A. length, B. 45.0 C. Brittle D. 3.5 cm​

Answers

The option that is an intensive property is brittle (option C).

What is an intensive property?

Intensive property of a material is that property that does not depend on the amount or shape of the material, a property of the material at a specific point in space.

The properties of matter that do not depend on the size or quantity of matter in any way are referred to as an intensive property of matter.

Intensive properties of matter include the following: temperature, density, colour, melting and boiling point, etc., because they will not change with a change in size or quantity of matter.

Therefore, brittleness is an intensive property of a material.

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An inflatable toy starts with 1.05 moles of air and a volume of 5.17 liters. When fully inflated, the volume is 8.00 liters. It the pressure and temperature inside the toy don't change, how many moles of air does the toy now contain?

Answers

1.62 moles of air the toy now contain. At STP, moles can be converted to gas volume and gas volume to moles using molar volume.

How to calculate no of moles ?

An experimental gas law known as Avogadro's law or Avogadro-hypothesis Ampère's connects the volume of a gas to the amount of gas material present. The law is an instance of the ideal gas theory.

At constant temperature and pressure, volume is directly proportional to the number of moles of the gas.

The formula used for solving this type of problems is:

v1 / v2 = n1/ n2

let's plug in the given values in the formula:

5.17 / 8.00 = 1.05 m / n2

n2 = 8.00 * 1.05  /  5.17

n2 = 1.62 moles

So, the toy contains 1.62 moles of air when it's volume is 8.00 Liter.

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g two nuclei of 40ca (atomic number 20) undergo fusion to form a nucleus of 80 zr (atomic number 40). the total binding energy of 40ca is b. what would be the best estimate for the total binding energy of 80 zr?

Answers

The total binding energy of 80Zr is therefore approximately 4.58MeV.

What is isotopes?

An isotope is an atom of a particular element that has a different number of neutrons than other atoms of that same element. This difference in the number of neutrons causes the isotopes to have different atomic masses. Isotopes of an element can be either stable or unstable. Stable isotopes are not radioactive and do not decay, while unstable isotopes are radioactive and undergo radioactive decay.

The total binding energy of 80Zr can be estimated using the mass defect of the two isotopes. According to the semi-empirical mass formula, the binding energy of a nucleus is related to its mass defect. The mass defect of the two nuclei can be calculated by subtracting the mass of the separate nuclei from the mass of the combined nucleus.

The mass of 40Ca is 39.96259 amu and the mass of 80Zr is 79.91652 amu. The combined mass of the two nuclei is 119.87911 amu.
The mass defect of the combined nucleus is therefore 119.87911 - 39.96259 - 79.91652 = 0.005 amu,
or 0.005 x 931.5 MeV/amu = 4.58MeV.
The total binding energy of 80Zr is therefore approximately 4.58MeV.

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the enthalpy of sublimation for a particular compound at 25.0 c is 32.4 kj/mol. the enthalpy of fusion for this compound at its melting point is 10.4 kj/mol. calculate the enthalpy of vaporization for this compound.

Answers

The enthalpy of vaporization for this compound is 22.0 kJ/mol.

What is vaporization?

Vaporization is a process in which a liquid or solid is transformed into a gaseous state. It occurs when molecules in the liquid or solid absorb enough energy to break their intermolecular bonds and become a gas. This process can be carried out either through the application of heat or pressure, or through a process known as sublimation, which occurs when a solid is exposed to a vacuum.

ΔHₙ = ΔHₓ - ΔHₐ

Where, ΔHₙ = Enthalpy of vaporization

ΔHₓ = Enthalpy of sublimation (32.4 kj/mol)

ΔHₐ = Enthalpy of fusion (10.4 kj/mol)

ΔHₙ = 32.4 - 10.4

ΔHₙ = 22.0 kJ/mol

The enthalpy of vaporization for this compound is the difference between the enthalpy of sublimation and the enthalpy of fusion. Therefore, the enthalpy of vaporization for this compound is 22.0 kJ/mol.

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Which selection from the section why the complaints over migrant workers? best explains why most people in qatar have few rights? Briana has just gotten a job working as a clerk in a law firm, something she's deeply interested in and finds mentally stimulating. This change will have the greatest impact on her A) emotional and social wellnessB) occupational and intellectual wellnessC) physical and spiritual wellnessD) social and physical wellness you purchase a home for $200,000 that you expect to appreciate 6% in value on an annual basis. how much will the home be worth in ten years? motor parts inc. and national auto stores enter into a contract for a sale of auto parts that meet certain specifications. motor ships goods that do not comply. national What does the color yellow signify? What was the purpose of the Union blockade? multiple choice. Write the corresponding section of mRNA produced from the following section of DNA template strands: a. 3 C C G A A G G T T C A C 5 b. 3 T A C G G C A A G C T A 5 10. What amino acid is coded for by each of the following mRNA codons? a. CCA b. AAC c. GGU d. AGG e. UCU f. UUC g. CGG h. GCA natural monopoly analysis the following graph gives the demand (d) curve for water services in the fictional town of streamship springs. the graph also shows the marginal revenue (mr) curve, the marginal cost (mc) curve, and the average total cost (atc) curve for the local water company, a natural monopolist. on the following graph, use the black point (plus symbol) to indicate the profit-maximizing price and quantity for this natural monopolist. monopoly outcome 0 1 2 3 4 5 6 7 8 9 10 40 36 32 28 24 20 16 12 8 4 0 price (dollars per hundred cubic feet) quantity (hundreds of cubic feet) d mr mc atc 3.5, 26 which of the following statements are true about this natural monopoly? check all that apply. it is more efficient on the cost side for one producer to exist in this market rather than a large number of producers. the water company is experiencing diseconomies of scale. the water company must own a scarce resource. in order for a monopoly to exist in this case, the government must have intervened and created it. true or false: without government regulation, natural monopolies always earn zero profit in the long run. true false Describe the offer that the Jewish people were given by the British Empire. a. In the Balfour Declaration________ Select the sentence that expresses the message clearly: (4 points)O aOb bOdI ask whether we should study some more, but they said we were fine.I ask whether we should have study some more, but they say we were fine.I asked whether we should have studied some more, but they say we are fine.I asked whether we should study some more, but they said we were fine. Elementary and secondary schools may participate or not in the National School Lunch Program. Participating allows the school toa. get better foodb. have more variety in foodc. save money when federally fundedd. create better dietse. control fat intake an anti-smoking campaign features former tobacco users who are visibly and audibly sick. which type of framing did this campaign use? gravel is being dumped from a conveyor belt at a rate of cubic feet per minute. it forms a pile in the shape of a right circular cone whose base diameter and height are always the same. how fast is the height of the pile increasing when the pile is feet high? recall that the volume of a right circular cone with height and radius of the base is given by . the archenteron of a mesolecithal embryo with holoblastic cleavage eventually develops into which structure? please help with this The marginal revenue curve for a monopoly tells us that as the monopolist sells one more unit, the marginal revenue per unit will fall.True or False what is 3f2 x 7f?????????????????????? A graphing calculator is recommended.Three students, Linda, Tuan, and Javier, are given five laboratory rats each for a nutritional experiment. Each rat's weight is recorded in grams. Linda feeds her rats Formula A, Tuan feeds his rats Formula B, and Javier feeds his rats Formula C. At the end of a specified time period, each rat is weighed again, and the net gain in grams is recorded. Using a significance level of 10%, test the hypothesis that the three formulas produce the same mean weight gain. (Let 1 = Linda's rats, 2 = Tuan's rats and 3 = Javier's rats.)Weights of Student Lab RatsLinda's ratsTuan's ratsJavier's rats46.349.853.342.342.743.144.141.840.248.748.947.740.846.551.5Enter an exact number as an integer, fraction, or decimal.df(num) =Enter an exact number as an integer, fraction, or decimal.df(denom) =State the distribution to use for the test.A. F2, 12B. F12, 2C. F14, 2D. F14, 12E. F2, 14What is the test statistic? (Round your answer to two decimal places.)What is the p-value? (Round your answer to four decimal places.)Explain what the p-value means for this problem.A. If H0 is false, then there is a chance equal to the p-value that the value of the test statistic will be equal to or less than the calculated value.B. If H0 is true, then there is a chance equal to the p-value that the value of the test statistic will be equal to or less than the calculated value.C. If H0 is false, then there is a chance equal to the p-value that the value of the test statistic will be equal to or greater than the calculated value.D. If H0 is true, then there is a chance equal to the p-value that the value of the test statistic will be equal to or greater than the calculated value.Indicate the correct decision ("reject" or "do not reject" the null hypothesis), the reason for it, and write appropriate conclusions.(i) Alpha (Enter an exact number as an integer, fraction, or decimal.) =(ii) Decision:reject the null hypothesisdo not reject the null hypothesis(iii) Reason for decision:Since < p-value, we do not reject the null hypothesis.Since > p-value, we reject the null hypothesis.Since < p-value, we reject the null hypothesis.Since > p-value, we do not reject the null hypothesis.(iv) Conclusion:There is sufficient evidence to conclude that there is a difference among the different nutritional formulas for rats with respect to weight gain.There is not sufficient evidence to conclude that there is a difference among the different nutritional formulas for rats with respect to weight gain. a symphony is a group of answer choices work for solo instrument. work for piano solo. sonata for orchestra. work for chorus and orchestra. It is now time to write the story that you will share with your classmates. Imagine that you are an archaeologist who works with Sarah Parcaks team. You and some other archaeologists are sent to Egypt to help dig up a site that Parcaks team discovered. During your dig, something surprising happens. Write a suspense story about what you find at the site and what feelings are going through your head as you make the discovery. The story should be several paragraphs long. Writers often do research to add realistic details to the setting, characters, and plot in their stories. When writing your story, find ways to use information and details about armchair archaeology and Egyptian pyramids to improve your story and help you develop your characters, the setting, and the plot. Use details, dialogue, and description where appropriate.