When measuring the temperature of a pure solvent while cooling it, the temperature drops but then remains constant for a certain period of time. After more time, the temperature continues to fall. When the temperature as a function of time is plotted, the time during which the temperature remianed constant produces a plateau in the graph. To what temperature does the plateau correspond?.

Answer:

gain electrons

Explanation:

"atoms gain electrons, they acquire a negative charge "

Between OH and C=O, the strong nucleophile is OH and the strong electrophile is C=O.

1. OH (hydroxide ion) is a strong nucleophile because it has a negative charge on the oxygen atom, which allows it to donate its lone pair of electrons to an electrophilic center.
2. C=O (carbonyl group) is a strong electrophile because the carbon atom has a partial positive charge due to the electronegativity difference between carbon and oxygen atoms in the double bond. This makes the carbon atom highly susceptible to nucleophilic attack.

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Aldehydes are more reactive than ketones towards nucleophilic attack because of presence of a hydrogen atom Aldehydes have a carbonyl group (-CHO) which consists of a carbon atom double bonded to an oxygen atom and a hydrogen atom.

This hydrogen atom is very reactive and makes the carbonyl carbon atom more electrophilic and susceptible to nucleophilic attack. In contrast, ketones do not have a hydrogen atom attached to the carbonyl carbon atom, making it less reactive towards nucleophilic attack.

The presence of the hydrogen atom in aldehydes allows for the formation of a resonance stabilized intermediate during nucleophilic attack. The nucleophile attacks the carbonyl carbon atom, resulting in a tetrahedral intermediate with a negatively charged oxygen atom and a positively charged carbon atom.

The positive charge on the carbon atom is stabilized by resonance with the adjacent carbonyl oxygen atom and the hydrogen atom. This resonance stabilization increases the electrophilicity of the carbonyl carbon atom, making aldehydes more reactive towards nucleophilic attack.

In addition, the smaller size of aldehydes compared to ketones also contributes to their higher reactivity. The smaller size of aldehydes allows for a closer approach of the nucleophile to the carbonyl carbon atom, resulting in a stronger interaction and faster reaction.

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Answer:

weight of H₂O formed = 2.3 grams H₂O (2 sig. figs.)

Explanation:

Rxn:                  CH₄(g)         +      2O₂(g)          =>     CO₂(g)           +  2H₂O(g)

Given:                 1.16g                   4.16g                     3.52g                  ? (g)

Moles:         1.16g/16g·mol⁻¹    4.16g/32g·mol⁻¹    3.52g/44g·mol⁻¹

                     = 0.0725mol.        = 0.13mol.             = 0.08mol.    => ? (moles)

Limiting Reactant: Divide each mole value by related coefficient of balanced standard equation (that is, balanced with coefficients in lowest whole number ratios). The smaller value is the limiting reactant.

                    0.0725/1                   0.13/2                0.080/1

                    = 0.0725                 = 0.065              = 0.080

Limiting Reactant is O₂(g) => 0.065 is smaller value after dividing each mole value by related coefficient of balanced equation.

NOTE: When working problem, however, one must use the mole value calculated from given amount in grams. That is, in this case 0.13 mole O₂. The 'divide by related coefficient and check smaller value' is ONLY for identifying the limiting reactant. This trick works for ALL general chemistry problems.

Moles H₂O formed: Since the coefficient of the limiting reactant (O₂) equals the coefficient of water (H₂O), then the moles of water formed is 0.065 mole H₂O.

Weight (in grams) of H₂O formed:

Grams H₂O = moles H₂O  x  formula weight H₂O

                   = 0.13 mole H₂O  x  18 g H₂O/mole H₂O

                   = 2.34 g H₂O  (calculator answer)

                   = 2.3 g H₂O  (final answer should be rounded to  2 sig. figs.)                                                                                                                                        => form of final answer should be based on data in final computation having the least number of sig. figs.                                      

Review: Sequence of calculations

       =>  moles of limiting reactant / coefficient of same cpd. in std. equation               = unknown (X) / coefficient of same (unknown) cpd. in std. equation

       => cross multiply and solve for unknown (X)

       => L.R.(moles) / eqn. coef. of L.R. = X / eqn. coef. of X  

       => (L.R.(calc'd moles)(eqn. coef. of X) = (X)(eqn. coef. of L.R.)

       => X (in moles) = (L.R.(calc'd. moles)(eqn. coef. of X) / (eqn. coef. of L.R.)

        => grams = moles x formula wt.                                                                

        => volume (L) = moles x std. volume (= 22.4L/mole)                                  

        => #particles = moles x Avogadro's Number (= 6.02 x 10²³ parts/mole)

Answer:

covalent network

Explanation:

trust me on this one

Explanation:

Covalent bonds can be classified based on the number of bonds between atoms into three categories:

1. Single Covalent Bond: In a single covalent bond, two atoms share one pair of electrons. This is the most common type of covalent bond. For example, in H2O, each hydrogen atom forms a single covalent bond with the oxygen atom.

2. Double Covalent Bond: In a double covalent bond, two atoms share two pairs of electrons. This bond is stronger than a single covalent bond. For example, in O2, the oxygen atoms are connected by a double covalent bond.

3. Triple Covalent Bond: In a triple covalent bond, two atoms share three pairs of electrons. This bond is the strongest among the three types. For example, in N2, the nitrogen atoms are connected by a triple covalent bond.

It is important to note that the number of bonds between atoms is determined by the number of electrons they need to achieve a stable electron configuration, which varies depending on the elements involved.

The covalent bond is classified mainly into three types

single, double and triple bonds.

Covalent bond is a bond formed between two atoms through the sharing of two electrons between them.  The atoms will share more than one electron pairs if the valency is not satisfied.  the three types of covalent bond are single bond, double bond and triple bond.

single bond is formed when one pair of electrons are shared between atoms, while if two pairs or three pairs are shared, it is called double or triple bond respectively. Covalent compounds are those which contains covalent bonding.

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Answer:

Lower fuel efficiency than Conventional Diesel

Pros of Biodiesel Cons of Biodiesel

Renewable May damage fuel filters and pipes

Incredibly Safe Can Effect Food Supply

Ready to Use Little bit Expensive

Extends engine lifespan Lower fuel Efficiency than DieselHydrogen Fuel Cell Advantages and Disadvantages in Material...

Hydrogen Fuel Cell Technology.

Advantage: High Energy Density Improves Productivity.

Disadvantage: The Use of Fossil Fuels in Hydrogen Production.

Disadvantage: Hydrogen Storage and Transportation.

Disadvantage: Fuel Cell Efficiency.Ethanol Fuel is Cost-effective Compared to Other Biofuels. ...

Ecologically Effective. ...

Helps Reduce Global warming. ...

Easily Accessible. ...

Minimizes Dependence on Fossil Fuels. ...

Contributes to Creation of Employment to the Country. ...

Opens up Untapped Agricultural Sector. ...

Ethanol Fuel is a Source of Hydrogen.draw a table to compare the advantages and disadvantages of three feels _ ethanol,hydrogen hope it's right

Writing and balancing complex half-reactions in a basic solution involves several steps, including identifying the oxidation and reduction reactions, balancing atoms other than hydrogen and oxygen, balancing oxygen atoms with water molecules, balancing hydrogen atoms with hydroxide ions, and finally balancing the charges with electrons.

To balance complex half-reactions in a basic solution, one must first identify the oxidation and reduction reactions and balance the atoms involved. Next, the number of oxygen atoms is balanced by adding water molecules to the side deficient in oxygen. Hydrogen atoms are then balanced by adding hydroxide ions to the side deficient in hydrogen. Finally, the charges are balanced by adding electrons to the side that requires charge balance.

In conclusion, writing and balancing complex half-reactions in a basic solution involves a systematic process that ensures conservation of mass and charge. By following the steps of identifying reactions, balancing atoms, adding water molecules and hydroxide ions, and balancing charges with electrons, one can effectively write and balance complex half-reactions in a basic solution.

This skill is crucial in various fields, including electrochemistry and chemical analysis, where understanding and manipulating redox reactions are essential.

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The number of moles of aluminum present in an Al cylinder with a mass of 15 g is C. 0.56 moles

To find the number of moles of aluminum present in an Al cylinder with a mass of 15 g, you can use the formula:

Number of moles = mass / molar mass

The molar mass of aluminum is 26.98 g/mol. Therefore, you can plug in the given values into the formula to find the number of moles:

Number of moles = 15 g / 26.98 g/mol

Number of moles = 0.556 moles ≅ 0.56 moles

Therefore, the correct answer is C. 056 moles of Aluminum.

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Answer:

Explanation:

Cold air masses tend to move toward the Equator. Warm air masses tend to move toward the poles. The Coriolis effect causes them to move on a diagonal. Many air masses move toward the northeast over the U.S. This is the same direction that global winds blow.

Answer:

Hydrogen Oxide and Nitrogen Trihydride

Explanation:

The systematic name for water (\(H_2O\)) is "dihydrogen monoxide" and the systematic name for ammonia (\(NH_3\)) is "nitrogen trihydride."

However, these systematic names are not commonly used in everyday language. Instead, water is almost always referred to as "water" and ammonia is almost always referred to as "ammonia." The common names for these compounds are widely recognized and easy to use, which is why they are used more often than systematic names.

Nonetheless, it's important to know the systematic names of these compounds if you're studying chemistry or if you need to use them in a scientific context. While they may not be as convenient as the common names, the systematic names provide a clear and unambiguous way to refer to these compounds.

In summary, the systematic names for water and ammonia are "dihydrogen monoxide" and "nitrogen trihydride," respectively, but they are not commonly used in everyday language.

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Answer:

Pretty sure that’s correct

Explanation:

Answer: The answer is:

              The grass population will increase.

Explanation:  Didn't see anything that could be correct, so I chose this on the K12 test and it was correct.

Answer:

what is this question??

Answer:

False

Explanation:

A series circuit is one that is all connected

The change in internal energy, when 1.34 moles of a diatomic ideal gas is heated from an initial temperature of 156 ºc to a final temperature of 421 ºc is 73.8*J

Given:

Number of moles of diatomic gas = 1

Initial temperature = 156 ºc

Final temperature = 421 ºc

Now, change in temperature(T) = 421 ºc-156 ºc = 265 ºc

therefore, change in internal energy = 5/2.nRT

Here, n is the number of diatomic ideal gas heated with value 1.34

R is the universal gas constant with value of 8.314

T is the change in temperature with value 265 ºc

U = 5/2.nRT

U = 5/2*1.34*8.314*265

U = 73.8*J

Internal energy U of a system or a body with well defined boundaries is the total of the kinetic energy due to the motion of molecules and the potential energy associated with the vibrational motion aend electric energy of atoms within molecules. Internal energy also includes the energy in all the chemical bonds.

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Answer:

Both quantity A and B are weight

In a trigonal prismatic crystal field, the symmetries of the 5 d-orbitals are determined by the point group symmetry of the crystal. The point group symmetry of a trigonal prism is D3h. The d-orbitals can be labeled as dx2-y2, dz2, dxy, dxz, and dyz.

Using character tables, we can determine the symmetries of each d-orbital in this crystal field. The character table for the D3h point group shows that the dz2 orbital has A1g symmetry, the dx2-y2 and dxy orbitals have E1g and E2g symmetry, respectively, and the dxz and dyz orbitals have E1u and E2u symmetry, respectively.

Therefore, the symmetries of the 5 d-orbitals in a trigonal prismatic crystal field are A1g, E1g, E2g, E1u, and E2u.

The symmetries of the 5 d-orbitals in a trigonal prismatic crystal field are as follows:

1. Identify the trigonal prismatic geometry: This geometry has a central metal ion surrounded by six ligands at the vertices of a trigonal prism. The metal-ligand bonds are along the x, y, and z axes.

2. Determine the d-orbital splitting: In a trigonal prismatic crystal field, the d-orbitals split into two sets: a lower-energy set (a1g and e'g) and a higher-energy set (e"g).

3. Assign the symmetries: The lower-energy set consists of the d(z^2) orbital with a1g symmetry and the d(x^2-y^2) and d(xy) orbitals with e'g symmetry. The higher-energy set contains the d(xz) and d(yz) orbitals with e"g symmetry.

In summary, the 5 d-orbitals in a trigonal prismatic crystal field have the following symmetries: d(z^2) has a1g, d(x^2-y^2) and d(xy) have e'g, and d(xz) and d(yz) have e"g.

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Answer:

Chlorine (Cl)

Explanation:

Bromine: 2.96 electronegative

Chlorine: 3.16 electronegative

3.16 > 2.96

Hope this helps!!

Answer:

Falso.

Explanation:

El modelo cuántico (no relativista) de Schrodinger, piensa a los electrones como ondas estacionarias, tal que la amplitud de dichas ondas decae muy rápidamente cuando se "alejaban" del radio atómico. (Es decir, habia poca probabilidad de que los electrones escaparan del radio atomico, y era por ello que se quedaban orbitando cerca del nucleo). Es decir, podríamos pensar en esto como una "nube de probabilidades" más que una nube electronica

La idea de nube electrónica realmente viene de modelos previos, como el de Rutherford o el de Bhor, los cuales eran modelos clásicos.

Answer:

300 m

Explanation:

Answer:

300

Explanation:

20x15=300

i know that someone else already got this i just showed the work

Under normal circumstances, the nitrogen-containing bases adenine (A) and thymine (T) pair together, and cytosine (C) and guanine (G) pair together. The binding of these base pairs forms the structure of DNA

Answer:

adenine (A) and thymine (T) pair together and cytosine (C) and guanine (G) pair together in DNA

Answer:

a- customary systems..

Answer:

a

Explanation:

I hope God it has to be 20 characters so here but I hope this right please have a god day

Answer:

The answer is "B. A conductor that has less conductivity than do metallic conductors."

Explanation:

I took the quiz on A P E X, and I got it right.

Answer:

λ = 3.2 m

Explanation:

Step 1: Given data

Step 2: Calculate the wavelength of the ocean wave

The ocean wave is a mechanical wave. We can calculate the wavelength of the wave using the following expression.

λ = v/f

λ = (27.5 m/s)/8.5 s⁻¹

λ = 3.2 m

Answer:

Electromagnetism is the study of the electromagnetic force, one of the four fundamental forces of nature. It includes the electric force, which pushes all charged particles, and the magnetic force, which only pushes moving charges.It is used in many electrical appliances to generate desired magnetic fields. It is even used in a electric generator to produce magnetic fields for electromagnetic induction to occur.

Explanation:

tell me if this helped, ill try and explain better

Answer:

This is the current method of producing sulphuric acid in the high concentrations needed for industrial processes.

Explanation:

This is the meaning of CONTACT PROCESS.

Hope it helps.