in which species is resonance most useful in explaining the observed bond lengths?

Answer:

A. 2,3-dimethylpentane

Explanation:

edge 2022

Hydrocarbons are the simplest compound containing carbon and hydrogen in their molecular structure. 2, 3 dimethyl pentane is correct.

Hydrocarbons are the simplest compound containing carbon and hydrogen in their molecular structure. There are four types of hydrocarbon as follows

Alkanes, alkenes, alkynes and aromatic hydrocarbons. Alkane contai carbon carbon single bond in their structure .Alkene containing carbon carbon double bond in their structure while alkynes contain carbon carbon triple bond in their structure.

Aromatic hydrocarbon contain benzene ring in their structure. Benzene is the example of aromatic hydrocarbon. Aromatic hydrocarbons are used as paint removal and are also used as a solvents.

Thus, 2, 3 dimethyl pentane is correct . It is a hydrocarbon containing carbon and hydrogen in their structure.

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Answer:

Atom Labeling

Explanation:

Y- neutron

Z-protron

X - electron

W- nucleus

Answer:

A gas at very low volumes, when gas particles are very close together

A gas at very low temperatures, when gas particles have very little kinetic energy

A gas with highly polar molecules that have very strong inter-molecular forces

Explanation:

The Kinetic Molecular Theory:

RM / NV / NF / EC / ET

Although none of the assumptions provided in the molecular theory of gases are strictly correct, they are fair enough for modeling some systems. It is an idealized approach of real systems. The fundamental presumptions are nearly identical to those of an ideal gas.

The most logical of the hypotheses is that of elastic collisions. Since gas molecules are treated as perfectly hard spheres in Newton's equations and elastic collisions, there is no energy lost in compressing the gas molecules during a collision.

For bulk, light gases at moderate temperatures and low to moderate pressures, it is acceptable to assume that there is an attractive force between the gas and the container wall. Since the walls of the containers only account for a minor portion of collisions in macroscopic quantities, they can typically be disregarded. Only until the gas's total density exceeds the kinetic energy do forces between its particles start to become significant. For light gases like He and straightforward diatomic gases, the kinetic energy of the gas molecules far outweighs the intramolecular interactions at normal temperatures.

But in a complete way of the KM theory being described:

The microscopic characteristics of atoms (or molecules) and their interactions, which result in observable macroscopic qualities, are described by the kinetic molecular theory of matter (such as pressure, volume, temperature). The idea may be used to explain why matter exists in distinct phases (solid, liquid, and gas), as well as how matter can transform between these phases.

The three states of matter are: As we transition from the solid to the gaseous phase, you'll notice that the distance between atoms or molecules widens.

According to the kinetic molecular theory of matter,

According to the Kinetic Molecular Theory, gas particles collide in an elastic manner and are always in motion. Only absolute temperature directly affects a group of gas particle's average kinetic energy.

Part I of How the Kinetic-Molecular Theory Explains Gas Behavior.

If the volume is kept constant, the faster gas molecules collide with the container walls more frequently and more violently, raising the pressure according to Charles' law.

Answer:

See below

Explanation:

Gas at LOW PRESSURE or high temperature with little or no intermolecular forces would be closest to ideal gas behavour.

Answer:

~Na+1 is already in the preferred form. Because of this, the second ionization energy of sodium is higher than normal. Mg+1 loses an electron to form s2 p6 .

Answer:

Chemical Change

Explanation:

Physical change and phase change are both changes in the matter's state. Such as solid, gas and liquid. Not what it's made of. So when a new substance is formed, it' a chemical change.

Answer: gas

Explanation:

Answer:

The primary properties of visible light are intensity, propagation-direction, frequency or wavelength spectrum and polarization.

Explanation:

Answer:

1, 4, 5 are the correct answers

Explanation:

Hope this helps! :D

Answer: Fe

Explanation: Fe (Iron) is the only element since it involves only 1 atom. The other options are compounds, since there are more than 2 atoms bonded together.

Answer:

C₂H6

Explanation:

Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). Option A

A hydrocarbon is a compound that consists of only carbon and hydrogen atoms. It is important to identify the formula that represents a hydrocarbon among the given options:

A) C₂H6: This formula represents ethane, which is a hydrocarbon. Ethane consists of two carbon atoms bonded together with single bonds and six hydrogen atoms.

B) C₂H5OH: This formula represents ethanol, which is not a hydrocarbon. Ethanol contains a hydroxyl group (-OH), indicating the presence of oxygen in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.

C) C₂H5Cl: This formula represents ethyl chloride, which is not a hydrocarbon. Ethyl chloride contains a chlorine atom (Cl) in addition to carbon and hydrogen atoms. It is a haloalkane, not a hydrocarbon.

D) C₂H6O: This formula represents ethanol, which, as mentioned before, is not a hydrocarbon. Ethanol contains an oxygen atom (O) in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.

Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). It consists only of carbon and hydrogen atoms, making it a suitable representation of a hydrocarbon.

In summary, the formula C₂H6 (option A) represents a hydrocarbon, while the other options contain additional elements (oxygen or chlorine) that make them non-hydrocarbon compounds. Option A

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Answer:

The first one is on google

Explanation:

Gravitational influence of the sun on the different planets least is mercury 0.38 g and greatest is neptune 1.14 g

Gravity, also called gravitation, in mechanics, the universal force of attraction acting between all matter and it is by far the weakest known force in nature and thus plays no role in determining the internal properties of everyday matter and the sun is the body that has the greatest gravitational influence on all the other components of the system that revolve around it and least is mercury 0.38 g and greatest is neptune 1.14 g

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When mechanical energy is lost due to friction, it becomes thermal energy.

Mechanical energy is the sum of kinetic energy and potential energy in an object that is used to accomplish a job or to move an object. Mechanical energy can be transformed between kinetic and potential energy, and it can be transformed between various forms of energy such as heat, light, and sound.

Friction is a force that opposes movement between two surfaces that are in touch with one another. When two surfaces are rubbed together, the force of friction opposes the motion of the objects.When mechanical energy is lost due to friction, it becomes thermal energy. As a result of friction, the mechanical energy of an object transforms into heat, which is referred to as thermal energy.

The heat produced by friction is due to the motion of molecules in the surface. The conversion of mechanical energy into thermal energy is a natural process that occurs all the time as a result of friction. Therefore, it is important to reduce friction in order to conserve mechanical energy, and hence reduce wastage.

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Answer:

ether

Explanation:

ether is -OR

- Hope that helps! Please let me know if you need further explanation.

Answer:

\( \huge{ \boxed{1.213 \: \text{moles}}}\)

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

\( \bold{n = \frac{N}{L}} \\ \)

where

From the question

N = 7.30 × 10²³ NaCl molecules

\(n = \frac{7.30 \times {10}^{23} }{6.02 \times {10}^{23} } = \frac{7.30}{6.02} \\ = 1.2126\)

We have the final answer as

The moles would be 12 moles, 4 moles and 11.34 moles

When hydrogen gas (H2) reacts with oxygen gas (O2) to produce water (H2O), the balanced chemical equation is:

2H2 + O2 -> 2H2O

So,

For every 6 moles of H2, 12 moles of H2O will be produced

For every 2 moles of H2, 4 moles of H2O will be produced

For every 5.67 moles of H2, 11.34 moles of H2O will be produced.

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Answer:

380

Explanation:

Q=mco

Q is the energy

M is mass

C is specific heat

O is increased in temperature

The molar solubility of silver iodide can be calculated using the molar solubility of silver iodide is 1.2 × 10–8 M, rounded to 2 significant figures..

The solubility product constant (Ksp) is a measure of the degree to which a sparingly soluble salt dissociates into its constituent ions in solution. The Ksp expression is written as the product of the concentrations of the ions raised to their stoichiometric coefficients in the balanced chemical equation. By assuming that the substance dissociates completely, we can use the Ksp expression to calculate the molar solubility of the salt. In this case, the molar solubility of silver iodide is calculated to be 1.2 × 10–8 M, which indicates that only a very small amount of AgI dissolves in water.

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Answer:

Explanation:

In sulfur dioxide there are 32.06 grams of sulfur and 32 grams of oxygen .

In sulfur trioxide there are 32.06 grams of sulfur are combined with 48 grams of oxygen.

The ratio of oxygen which reacts with 32.06 gram of sulfur is 32: 48 .

This ratio is equal to 2 : 3.

This is in accordance with law of multiple proportion because , the ratio of mass of oxygen which reacts with constant mass of sulfur is integral ratio . Hence they are in accordance with law of multiple proportions.

Answer:

sulfur and oxygen can react to form both sulfur dioxide and sulfur trioxide in sulfur dioxide there are 32.06 grams of sulfur and 32 grams of oxygen in sulfur dioxide there are 32.06 grams of sulfur are combined with 48 grams of oxygen

a. what is the ratio of the weights of oxygen that combine with 32.06 g of sulfur?

b. How do these data illustrate the law of multiple proportions? ​

Explanation:

In sulfur dioxide (\(SO_2\))

32.06 g of sulfur reacts with 32.0 g of oxygen.

In sulfur trioxide (\((SO_3)\) 32.0 g of sulfur reacts with 48.0 g of oxygen.

So, both th ecom[pounds are made from sulfur and oxygen,

But the amount of oxygen reacts with fixed amount of sulfur that is 32.06 g and it is in proportions that is:

32.0 g : 48.0 g

=2:3.

Hence, the ratio of oxygen combines with sulfur is in the ratio of 2:3.

b.

This data illustrates the law of multiple proportions.

Because the oxygen which is combining with fixed amount of sulfur is in proportions.

Since the reaction shown in the question is an acid - base reaction in the Lewis sense; the Lewis acid here is AlCl3  while the Lewis base here is Cl^- .

A Lewis acid is a substance that accepts electron pair while a Lewis base donates an electron pair.

Now consider the given reaction; AlCl3 +Cl^- ------> AlCl 4 ^-. The Lewis acid here is AlCl3  while the Lewis base here is Cl^- .

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The catalyst used in the hydrogenation of vegetable oils is a transition metal, commonly nickel, which facilitates the addition of hydrogen atoms to the unsaturated carbon-carbon double bonds in the oil molecules, resulting in a solid product with improved stability and shelf life.

Hydrogenation is a chemical reaction where hydrogen gas (H2) is combined with another substance, often to convert unsaturated molecules into saturated ones. In the case of vegetable oils, hydrogenation is employed to turn liquid oils into solid fats, such as margarine or shortening. This process enhances the stability, shelf life, and melting point of the oils.

The catalyst used in the hydrogenation of vegetable oils is typically a metal, often a transition metal. Common catalysts include nickel, palladium, platinum, and sometimes even rhodium. These metals facilitate the addition of hydrogen atoms to the unsaturated carbon-carbon double bonds found in the vegetable oil molecules. Nickel, being relatively inexpensive and effective, is the most commonly used catalyst in this process.

During the hydrogenation reaction, the vegetable oil is heated and mixed with hydrogen gas. The metal catalyst is introduced, and its presence accelerates the reaction, allowing the hydrogen atoms to be added to the oil molecules efficiently. The result is a product with a higher percentage of saturated fatty acids, leading to its solid state at room temperature.

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The major product expected from the sequential organic reaction of cyclopentane with Br2/H2O, followed by sodium hydroxide , then the correct option is e) None of these choices.

The sequential organic reaction of cyclopentane with Br2/H2O, followed by sodium hydroxide, leads to the formation of a major product.

The reaction of cyclopentane with Br2/H2O results in bromination of the double bond, adding Br atoms to the cyclopentene molecule. This forms a cyclic bromonium ion intermediate.

Subsequent treatment with sodium hydroxide (NaOH) triggers an intramolecular nucleophilic attack by the hydroxide ion (OH-) on the bromonium ion, resulting in the formation of a cyclic alcohol.

Among the choices given, we can analyze the possible products based on the given information. Since we don't have a visual representation of the structures, it is not possible to directly determine the specific product. However, based on the reaction conditions, the expected product is likely to involve the formation of a cyclic alcohol.

Given the options provided (I, II, III, IV), the correct answer cannot be determined without additional information. Hence, the correct choice is e) None of these choices.

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Answer: A Temperature of the solute

Explanation:

The volume (in L) at STP occupied by 1.24 mole of hydrogen gas is 27.78 liters

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

The volume of 1.24 mole of hydrogen gas can be obtained as illustrated below:

At standard temperature and pressure, STP,

1 mole of hydrogen gas = 22.4 Liters

Therefore,

1.24 mole of hydrogen gas = (1.24 mole × 22.4 Liters) / 1 mole

1 .24 mole of hydrogen gas = 27.78 liters

Thus, we can conclude from the above calculation that the volume of hydrogen gas is 27.78 liters

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Answer:

3.125g/mol

Explanation:

To find the molar mass of the gas, we need to initially find the number of moles (n) contained in the gas. To find the number of moles, we use the general gas law whose equation is:

PV=nRT

Where; P= Pressure

V= Volume occupied by gas

n= number of moles

R= general gas constant

(0.0821 L atm mol/K)

T= absolute temperature

According to the question; P= 2.0atm, V= 2.0L, n= ?, T= 298K

To find n, we make it the subject of the formula:

n= PV/RT

n= 2.0 × 2.0 / 0.0821 × 298

n= 4/ 24.4658

n= 0.16mol

If number of moles (n) of the gas is 0.16mol and it weighs 0.500g, its molar mass can be found using:

number of moles (n) = mass (g) / molar mass

Making MM subject of the formula;

molar mass = mass / number of moles

MM= 0.500/0.16

MM= 3.125

Hence, the molar mass of the gas is 3.125g/mol.

The number of moles of nitrogen required to fill the airbag is approximately 0.0295 mol.

What is Temperature?

Temperature is a physical property that measures the degree of hotness or coldness of an object or system, as compared to a standard reference point. It is a measure of the average kinetic energy of the particles (atoms or molecules) in a substance or system. The SI unit for temperature is the kelvin (K), but it can also be measured in degrees Celsius (°C) or Fahrenheit (°F).

To calculate the number of moles of nitrogen required to fill the airbag, we need to know the volume of the airbag and the conditions under which the nitrogen will be produced.

Let's assume that the airbag has a volume of 50 L and that the temperature and pressure inside the airbag are both 25°C (298 K) and 1 atm, respectively. We also need to know the molar volume of an ideal gas at these conditions, which is approximately 24.5 L/mol.

Now, we can use the ideal gas law to calculate the number of moles of nitrogen required:

PV = nRT

where P is the pressure, V is the volume, n is the number of moles, R is the gas constant (8.31 J/mol K), and T is the temperature.

First, we need to convert the temperature of the nitrogen from 495°C to Kelvin:

495°C + 273.15 = 768.15 K

Next, we can rearrange the ideal gas law to solve for n:

n = PV/RT

Substituting in the values we have:

n = (1 atm)(50 L)/(8.31 J/mol K)(768.15 K)

n = 0.0295 mol

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