In general, the solubility of a short chain carboxylic acid is greater than an ester with the same number of carbons. For example, butyric acid (four carbon atoms) is infinitely soluble in water, whereas ethyl acetate is only partially soluble in water (8 g/100 mL).

Select the statement that correctly explains why the water solubility of the carboxylic acid is greater than that of the ester.

a. Ethyl acetate has two -CH3 groups while butyric acid has only one.
b. The carboxylic acid is much more soluble because the-COOH group is on the end of the molecule and is therefore more accessible to H2O.
c. An ester group (-COO-) cannot form hydrogen bonds with water since there are no hydrogen atoms in the ester group.
d. Carboxylic acid groups (-COOH) can form hydrogen bonds with each other, but ester groups (Coo-) cannot.
e. A carboxylic ad roup CH) can form more hydrogen bonds with water than an ester group (-COO-).

B. recrystallization. Recrystallization is the process of forming new strain-free grains in a metal that has been heated to an elevated temperature.

Recrystallization is a process used to purify a solid compound. It involves dissolving the compound in an ariate solvent, usually one that has a high boiling point, and then slowly cooling the solution. As the solution cools, the dissolved compound will slowly crystallize out of the solution and the impurities that were present in the sample will remain dissolved. This process is repeated multiple times to ensure the highest purity of the compound is achieved. Recrystallization is a useful technique for purifying compounds that are not soluble in water, since it does not require the use of expensive reagents. It also allows for the purification of compounds that are insoluble in any organic solvent. This process is commonly used in laboratories to prepare a sample for further analysis or for use in a synthesis.

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Answer:

orbital shape.

Explanation:

1) There are four quantum numbers to describe the electrons. These are:

i) Principal quantum number (n)

ii) Azimuthal quantum number (ℓ), also called angular momentum quantum number.

iii) Magnetic quantum number (m)

iv) Spin quantum number (s)

2) The principal quantum number tells the main energy level. It can be 1, 2, 3, 4, 5, 6, 7. It is related to the orbital size. 1 is a small orbital, 7 is a big orbital.

2) The Azimuthal quantum number (ℓ) or angular momentum quantum number may be a number between 0 and n - 1.

It tells the kind of orbital, which is its shape

The correspondence is:

0 = s orbital,

1 = p orbital,

2 = d orbital,

3 = f orbital.

3) Magnetic quantum number (m) tells the orientation. It can be from - ℓ to + ℓ

For example when ℓ = 1, the orbital is p, and the magnetic quantum number may be -1, 0, or +1, which corresponds to px, py, pz: the orientation of the p orbital in the space.

4) Spin quantum number (s) can be either +1/2 or -1/2.

JM~ Hope this helps you out

Answer:

Example 1

palladium(II) nitrate,

Example 2

Metal catalysts such as Fe, Ni, Mo, and Co are routinely used in the manufacture of CNMs.

Explanation

The three metals used in catalytic converters — rhodium, platinum and palladium — are part of a category known as platinum group metals, or PGMs, which are known for their catalytic properties.

Answer:

Oxygen

Explanation:

From the question given above, the following data were obtained:

Number of electrons = 8

Number of protons = 8

Number of Neutrons = 8

Name of element =?

Next, we shall determine the atomic number of the element. This can be obtained as follow:

The atomic number of an element is simply defined as the number of protons in the atom of the element. Mathematically, it is expressed as:

Atomic number = proton number

From the question given above,

Number of protons = 8

Therefore,

Atomic number = 8

Comparing the atomic number of the element (i.e 8) with those in the periodic table, we can conclude that the element is oxygen since no two elements have the same atomic number.

The carrying capacity of the area was reduced in the year 10 according to the graph that shows the number of foxes on the island over a span of 15 years.

The graph shows a population of foxes over a span of 15 years. The y-axis represents the number of foxes on the island, while the x-axis represents time. The study began with the earlier 0 and ran until the start of year 15. According to the graph, the carrying capacity of the area was reduced in the year 10.

In the graph, it is shown that the population of foxes on Sunday Gill island had a significant increase from year 0 to year 3. After year 3, the fox population started to decrease and then remained fairly constant until year 10. After year 10, the population of foxes on the island started to decline more rapidly until the end of the study in year 15

This decline in the population of foxes on the island is most likely due to the reduction in carrying capacity of the area. Carrying capacity refers to the maximum number of individuals that an environment can sustain. When the carrying capacity of an environment is reached, it means that the environment can no longer provide the necessary resources to sustain the population.  

There are various factors that can cause a reduction in carrying capacity, such as environmental degradation, competition for resources, or a natural disaster. In this case, it is not clear what caused the reduction in carrying capacity in year 10, but it is likely that it was due to some environmental factor that impacted the availability of resources for the fox population.
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Answer:

Option D. 7.56 g of Hg.

Explanation:

The balanced equation for the reaction is given below:

4HgS + 4CaO —> 4Hg + 3CaS + CaSO₄

Next, we shall determine the mass of CaO that reacted and the mass of Hg produced from the balanced equation. This is can be obtained as follow:

Molar mass of CaO = 40 + 16

= 56 g/mol

Mass of CaO from the balanced equation = 4 × 56 = 224 g

Molar mass of Hg = 200.59 g/mol

Mass of Hg from the balanced equation = 4 × 200.59 = 802.36 g

SUMMARY

From the balanced equation above,

224 g of CaO reacted to produce 802.36 g of Hg.

Finally, we shall determine the mass of Hg produced by the reaction of 2.11 g of CaO. This can be obtained as follow:

From the balanced equation above,

224 g of CaO reacted to produce 802.36 g of Hg.

Therefore, 2.11 g of CaO will react to produce = (2.11 × 802.36)/224 = 7.56 g of Hg.

Thus, 7.56 g of Hg were obtained from the reaction.

The magnetic potential energy between them decreases when the interaction between the magnets as the north poles are brought closer together.

A magnetic dipole moment can have the potential energy in a magnetic field that depends on its magnetic field orientation.

Magnetic potential energy can be described as the energy stored in a system of magnets as a result of the exertion of a magnetic force on each other. When two magnetic poles attract or repel each other then the potential energy can be stored in their relative positions.

The magnetic force will cause similar poles to repel one another, and opposite magnetic poles to attract. Magnets have north and south poles, and the magnetic potential energy depends not only on the position within a magnetic field but also on the orientation of the magnet.

When the poles attract each other their magnetic potential energy and when they repel the magnetic potential energy decreases.

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Answer: the magnetic potential energy between them increases.

Explanation:

When two like poles are facing each other, they repel. Pushing them toward each other requires energy. This means that their potential energy increases as they are pushed together. Therefore, as the teacher pushes the magnets together, the magnetic potential energy between them increases.

Answer:

\([PCl_3]_{eq}=0.117M\)

\([Cl_2]_{eq}=0.117M\)

\([PCl_5]_{eq}=8x10^{-3}M\)

Explanation:

Hello,

In this case, for the given chemical reaction at equilibrium, we can write the law of mass action as shown below:

\(Kc=\frac{[PCl_3][Cl_2]}{[PCl_5]}\)

That in terms of the ICE methodology is written by means of the change \(x\) due to the reaction extent:

\(Kc=\frac{x*x}{[PCl_5]_0-x}\)

Thus, we need to compute the initial concentration of phosphorous pentachloride:

\([PCl_5]_0=\frac{13.0g*\frac{1mol}{208.25g} }{0.500L} =0.125M\)

So we write:

\(1.80=\frac{x^2}{0.125-x}\)

That we solve via either solver or quadratic equation to obtain the solution:

\(x=0.117M\)

Thereby, the equilibrium concentrations are:

\([PCl_3]_{eq}=x=0.117M\)

\([Cl_2]_{eq}=x=0.117M\)

\([PCl_5]_{eq}=0.125M-x=0.125M-0.117M=8x10^{-3}M\)

Best regards.

Answer: grey clouds

Explanation:

Answer:

Nimbostratus clouds if you want to be scientific but grey clouds ae also an answer.

Explanation:

Sorry if this late.

Your answer is D) Density

Density is the property of material that can change the speed of a wave. It affects the speed of the wave will be transmitted through it. The more dense the material it is, the slower the wave is transmitted through the object.

Answer:

Density

Explanation:

Density

Answer:

Two positive aspects of using methane recapture systems are able to generate significant electricity. Another benefit is that the process of anaerobic digestion creates heat that can be used to warm buildings where animals are kept

Answer:  The correct answer is;

Two positive aspects of using methane recapture systems include lowering the impact on greenhouse gasses and the production of energy. Methane is a very potent greenhouse gas that is contributing to global warming. As a result, the recapturing process reduces the methane impacts of global warming by reclaiming and reusing the gas for other purposes. Recaptured methane can be stored and used to generate electricity or used as fuel to power updated vehicles and other engines on the farm. The overall benefits from this combination are reducing impacts causing global warming and lower the cost of electricity or fuel on the farm.

Explanation:  This answer has been confirmed correct.

The equation that shows a balanced nuclear equation is as follows: 14/6 C → 0/-1 e + 14/7 N (option D)

A nuclear reaction is a process such as the fission of an atomic nucleus, or the fusion of one or more atomic nuclei and/or subatomic particles in which the number of protons and/or neutrons in a nucleus changes.

Nuclear equations represent the reactants and products in radioactive decay, nuclear fission, or nuclear fusion.

According to this question, certain nuclear equations are given. The balanced equation will have atoms of elements that are of the same number on both sides.

The fourth option is balanced because the number of atoms add up to ensure the conservation of mass.

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1. Oxygen is a reactant needed for all combustion reactions.

2. The products of the complete combustion reaction of a hydrocarbon (compound containing carbon and hydrogen) are carbon dioxide and water.

3. Complete combustion takes place if the quantity of oxygen is sufficient.

4. Incomplete combustion takes place if the quantity of oxygen is insufficient.

5. Combustion is a exothermic change.

6. In a combustion reaction, oxygen is the oxidizer and the substance which burns is the fuel.

7. The lower the kindling temperature, the easier is the combustion.

8. If a substance burns at room temperature in the absence of a flame the combustion is said to be spontaneous.

9. Combustion reactions are accompanied by heat and light effect.

10. Combustion reactions don't take place at the same rate.

1)Oxygen is a reactant needed for all combustion reactions. Combustion reactions are chemical reactions that involve the rapid combination of a fuel (usually a hydrocarbon) with oxygen gas. Oxygen acts as the oxidizing agent, providing the necessary component for the reaction to occur. Without oxygen, combustion cannot take place.

2)The products of the complete combustion reaction of a hydrocarbon are carbon dioxide and water. In the presence of sufficient oxygen, hydrocarbons undergo complete combustion, resulting in the production of carbon dioxide (\(CO_2\)) and water (\(H_2O\)). This reaction releases a significant amount of energy in the form of heat and light.

3)Complete combustion takes place if the quantity of oxygen is sufficient. Complete combustion occurs when there is an adequate supply of oxygen available for the reaction. In this case, the fuel (hydrocarbon) reacts completely with oxygen, resulting in the formation of carbon dioxide and water as the only products

4)Incomplete combustion takes place if the quantity of oxygen is limited. In situations where there is insufficient oxygen available, incomplete combustion occurs. This leads to the formation of products such as carbon monoxide (CO) and carbon (soot) in addition to carbon dioxide and water. Incomplete combustion is less efficient and can release harmful pollutants into the environment.

5)Combustion is a chemical change. Combustion is classified as a chemical change because it involves the breaking and forming of chemical bonds between atoms and molecules. The reactants (fuel and oxygen) undergo a chemical reaction to produce new substances (products) with different properties, such as carbon dioxide and water. Heat and light are also typically released during combustion.

6)In a combustion reaction, oxygen is the oxidizer, and the substance that burns is the fuel or combustible material. Oxygen acts as the oxidizing agent, meaning it accepts electrons from the fuel, leading to the oxidation (burning) of the fuel. The fuel provides the carbon and hydrogen atoms that combine with oxygen to form carbon dioxide and water.

7)The lower the kindling temperature, the easier the combustion. The kindling temperature is the minimum temperature at which a substance can ignite and sustain combustion. If the kindling temperature is lower, it means that less heat is required to initiate the combustion process. Substances with lower kindling temperatures are more prone to catching fire and sustaining combustion.

8)If a substance burns at room temperature in the absence of a flame, the combustion is said to be spontaneous. Spontaneous combustion refers to the ignition and burning of a substance without the need for an external ignition source, such as a flame. It occurs when certain materials, under specific conditions, undergo self-heating and eventually reach their ignition temperature, leading to combustion.

9)Combustion reactions are accompanied by heat and light effects. Combustion reactions are highly exothermic, meaning they release a significant amount of heat energy. This energy is released in the form of heat and light, resulting in flames or glowing embers during combustion.

10)Combustion reactions don't take place at the same rate for all substances. The rate of combustion can vary depending on factors such as the nature of the fuel, the availability of oxygen, temperature, and pressure. Different substances have different combustion rates due to variations in their chemical properties and reactivity.

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Answer:

h = 34.2 in

Explanation:

h = 3.0a + 28.2

h = height of a girl.

a = age of a girl.

h = 3.0a + 28.2

h = 3.0(2) + 28.2

h = 6 + 28.2

h = 34.2

The estimated height of a 2-year-old girl is 34.2 in.

Hope this helps, thank you :) !!

Answer:

Almost all corn oil is expeller-pressed

Explanation:

then solvent-extracted using hexane or 2-methylpentane (isohexane). The solvent is evaporated from the corn oil, recovered, and re-used. After extraction, the corn oil is then refined by degumming and/or alkali treatment, both of which remove phosphatides.Oct 16, 2020

Answer:

C. 2AgNO3(aq) + CaBr2(aq) --> 2AgBr(s) + Ca(NO3)2(aq)

Explanation:

Answer:

D

Explanation:

The statement that best explains why the table is incorrect is: Grass is a soluble substance. Option C is correct.

In the table, grass is listed under "Insoluble," but in reality, grass is not a substance that dissolves in water. It is a complex mixture of various compounds, including cellulose and other organic materials, which are not water-soluble. Grass does not dissolve when added to water; instead, it remains intact and is not readily soluble.

On the other hand, all the other substances listed in the table are correctly categorized. Sugar, food coloring, and honey are soluble substances because they dissolve in water. Sand and salt are insoluble substances because they do not dissolve in water.

Hence, C. is the correct option.

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The percentage yield of AgBr is 63.14%

We'll begin by writing the balanced equation for the reaction. This is given below:

Molar mass of Ag₂CO₃ = (2×108 ) + 12 + (3×16) = 276 g/mol

Mass of Ag₂CO₃ from the balanced equation = 1 × 276 = 276 g

Molar mass of AgBr = 108 + 80 = 188 g/mol

Mass of AgBr from the balanced equation = 2 × 188 = 376 g

From the balanced equation above,

276 g of Ag₂CO₃ reacted to produce 376 g of AgBr

From the balanced equation above,

276 g of Ag₂CO₃ reacted to produce 376 g of AgBr

Therefore,

5 g of Ag₂CO₃ will react to produce = (5 × 376) / 276 = 6.81 g of AgBr

Thus, the theoretical yield of AgBr is 6.81 g

Actual yield of AgBr = 4.3 g

Theoretical yield of AgBr = 6.81 g

\(percentage \: yield \: = \frac{actual}{theoretical} \times 100 \\ \\ percentage \: yield \: = \frac{4.3}{6.81} \times 100 \\ \\ percentage \: yield \: = 63.14\%\)

Thus, the percentage yield of AgBr is 63.14%

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Explanation:

H2So4=sulphuric acid , strong acid

The affect of radiation on healthy cells can be reduced when treating cancer by focusing the radiation on the cancerous cells.

These side effects are also known as late side effects, which causes the human healthy cells after some time. The Doctors try to protect the healthy human cells by lowering the power of the radiations as possible. The radiation dose is balanced between being high enough to kill cancer cells, yet low enough to limit damage to healthy cells. If we use the advancement of technology of dose conformity such as IMRT, SBRT, and IGRT, then we can get rid of such dangerous radiations.

So we can conclude that the affect of radiation on healthy cells can be reduced when treating cancer by focusing the radiation on the cancerous cells.

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Answer:

Answer:

0.768g of Fe are in the tablet = 38.4% by mass of Fe in the tablet

Explanation:

The balanced redox equation of Fe²⁺ with KMnO₄ in acidic medium is:

5Fe²⁺ + MnO₄⁻ + 8H⁺ → 5Fe³⁺ + Mn²⁺ + 4H₂O

Where 5 moles of Fe²⁺ react per mole of KMnO₄

The moles required of KMnO₄ are:

27.50cm³ * (1dm³ / 1000cm³) = 0.0275dm³ * (0.100mol / dm³) = 0.00275mol KMnO₄

Moles of Fe²⁺ are:

0.00275mol KMnO₄ * (5 moles Fe²⁺ / 1mol KMnO₄) = 0.01375moles of Fe²⁺

In grams (Molar mass Fe: 55.845g/mol):

0.01375moles of Fe²⁺ * (55.845g/mol) =

And percentage is:

0.768g Fe / 2.000g * 100 =

The method employed to separate a mixture of volatile gases propane, butane, and isopropane is Chromatography. Distillation is used to separate a solution of isopropyl alcohol and water.

Chromatography is a technique employed for the separation of a mixture of chemical compounds into their individual element. There are two phases in this technique - the Mobile phase and the Stationary phase. The Stationary phase is usually either liquid or solid. The Mobile phase is either gas or liquid.

Chromatography is based on the principle that when the mixture is dissolved in a gas or liquid, it carries them to a stable substance (Stationary phase). Each element has a different speed at which they travel through them, and this interaction between them results in their separation.

The method used to separate alcohol and water is Fractional distillation. It is based on the difference in the boiling points of the mixture. Each element boils at a different temperature, this enables the separation of water and alcohol. Water boils at 100°C whereas alcohol boils at 78.7°C.

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Answer:

Density often has units of grams per cubic centimeter (g/cm3). Remember, grams is a mass and cubic centimeters is a volume (the same ... and minerals since the density of substances rarely changes significantly. For example, gold will always have a density of 19.3 g/cm3; if a mineral has a density

Explanation:

For example, a 1-litre soda bottle filled with air would feel much lighter than the same ... If 500 mL of a liquid has a density of 1.11 g/mL, what is its mass? ... The density of water at 4oC can be written as 1.000g/cm3 , 1.000g/mL ... In order to determine the density of a substance, you need to know its mass and its volume.

If a substance has a density of 2.5 grams/centimeters³ then the mass of the substance having a volume of 50 centimeters³  would be 75 grams.

It can be defined as the mass of any object or body per unit volume of the particular object or body. Generally, it is expressed as in gram per cm³ or kilogram per meter³.

As given in the problem If a substance has a density of 2.5 grams/centimeters³ then we have to find out the mass of the substance which has a volume of 50 centimeters³

the density of the substance = mass of the substance /volume of the substance

2.5 grams/centimeters³ = mass of the substance/50 centimeters³      

mass of the substance = 2.5 ×50

                                      = 75 grams

Thus, the mass of the substance would be 75 grams.

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Answer:

d=3.95 g/l

Explanation:

1) Ideal gas equation:

pV = nRT

2) Transform the equation to compute density, d = m / V

n = mass in grams / molar mass = m / MM

pV = (m/MM) RT

=> pV = mRT/MM

=> m/V = pMM / (RT)

d = pMM / (RT)

p = 1.21 atm

MM = 83.80 g/mol (this is the atomic mass of krypton element)

T = 50 + 273.15 K = 323.15K

3) Compute:

d = (1.25 atm * 83.80 g/mol) / (0.0821 atm*liter /K*mol * 323.15K)

Answer:

c. or b._____________

Explanation:

correct me

Answer:

0.50 atm

Explanation:

Step 1: Calculate the total number of gas moles

The total number of moles is equal to the sum of the number of moles of each gas.

n = nXe+ nH₂ + nAr

n = 0.60 mol + 0.50 mol + 0.40 mol = 1.5 mol

Step 2: Calculate the mole fraction of hydrogen

The moe fraction of hydrogen is the quotient between the number of moles of hydrogen and the total number of moles.

ΧH₂ = 0.50 mol / 1.5 mol = 0.33

Step 3: Calculate the partial pressure of hydrogen

Given the total pressure (P) is 1.5 atm, we can calculate the partial pressure of hydrogen using the following expression.

pH₂ = P × ΧH₂

pH₂ = 1.5 atm × 0.33 = 0.50 atm

The volume of \(N_2O_5\) needed to produce 9.64 L of \(NO_2\) is 4.97 L, calculated using stoichiometry and the ideal gas equation.

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Answer:

A. Disturbing the equilibrium by adding NO2Cl decreases Qc to a value less than Kc.

B. To reach a new state of equilibrium, Qc therefore increases which means that the denominator of the expression for Qc decreases.

C. To accomplish this, the concentration of reagents decreases, and the concentration of products increases.

Explanation:

Hello,

In this case, for the equilibrium reaction:

\(NO_2Cl(g)+NO(g)\rightleftharpoons NOCl(g)+NO_2(g)\)

Whose equilibrium expression is:

\(Kc=\frac{[NO_2][NOCl]}{[NO_2Cl][NO]}\)

The proper matching is:

A. Disturbing the equilibrium by adding NO2Cl decreases Qc to a value less than Kc, since the denominator becomes greater, therefore, Qc decreases.

B. To reach a new state of equilibrium, Qc therefore increases which means that the denominator of the expression for Qc decreases, since the lower the denominator, the higher Qc as it has the concentration of reactants.

C. To accomplish this, the concentration of reagents decreases, and the concentration of products increases, since the reactants must be consumed in order to reestablish equilibrium by shifting the reaction towards the products.

Best regards.