Choose all of the following reaction mechanisms that are possible from the reaction between ethyl bromine and the cyanide ion The electrons of the double bond in the cyanide ion attack the carbon adjacent to bromine and a methyl group acts as the leaving group. The lone pair on the carbon atom in the cyanide ion attacks the carbon adjacent to bromine and the bromine acts as the leaving group. The lone pair on the nitrogen atom in the cyanide ion attacks the carbon adjacent to bromine and the bromine acts as the leaving group. The electrons of the triple bond in the cyanide ion attack the carbon adjacent to bromine and a methyl group acts as the leaving group The electrons of the double bond in the cyanide ion attack the carbon adjacent to bromine and the bromine acts as the leaving group O The lone pair on the carbon atom in the cyanide ion attacks the carbon not adjacent to bromine and the bromine acts as the leaving group. O The lone pair on the nitrogen atom in the cyanide ion attacks the carbon not adjacent to bromine and the bromine acts as the leaving group

The statement is not part of the kinetic molecular theory of gases that tells us how gases generally behave is "the attractive forces between the particles of a gas are usually very strong".

The kinetic theory of gases describes a gas as a large number particles (atoms or molecules), all of which are in constant, random motion.

The rapidly moving particles constantly collide with each other and with the walls of the container.

The following are some of the assumptions of kinetic theory of gases;

Thus, the only incorrect statement about kinetic theory of gases is "the attractive forces between the particles of a gas are usually very strong".

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The electronic configuration of

Helium is - 1s2,

Neon is [He]2s²2p⁶

Argon is 1s²2s²2p⁶ or Ne 3s² 3p⁶

The common characteristic is that their outermost shells are filled making them noble gases.

We can define the electronic configuration as the distribution of electrons of an atom or molecule in molecular orbitals.

Helium has 2 electrons in its  atomic number is 2  

Neon has 2,8 electrons in its shell atomic number 10.

Argon has 2,8,8 electrons in its shell and atomic number 18  Argon electron configuration will be 1s²2s²2p6  It is called a noble gas.

They do not react with other elements because their electronic shells are filled completing their octet configuration, and are stable and inert. They are called noble or inert gases.

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Caffeine is a water soluble molecule, so it would be expected to be soluble in an aqueous medium.

What is Caffeine?
In the methylxanthine class of stimulants, caffeine is a central nervous (CNS) stimulant. As a cognitive enhancer that improves alertness and attentional performance, it is primarily used recreationally. By preventing adenosine from binding to the adenosine A1 receptor, caffeine increases the release of the neurotransmitters acetylcholine. Caffeine can bind to and block adenosine receptors because of adenosine's similar three-dimensional structure. Additionally, caffeine raises levels of cyclic AMP by nonselectively inhibiting phosphodiesterase. The methylxanthine alkaloid caffeine is an angry, white crystalline purine that shares chemical similarities with the adenine as well as guanine bases of ribonucleic acid and deoxyribonucleic acid (DNA) (RNA).

Phosphoric acid is added to Coca-Cola to give it a tart flavor and to act as a preservative. It also helps to dissolve other ingredients, such as caffeine, which might otherwise be insoluble in the beverage.

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The 3' end of a strand of DNA contains a hydroxide group extending from the 3rd carbon of the sugar molecule.

The 3' and 5' ends of DNA molecules are referred to as the phosphate-sugar backbone of the molecule. The 3' end of the DNA is composed of a phosphate group and a deoxyribose sugar. The 5' end of the molecule is composed of a phosphate group and a ribose sugar. Both the 3' and 5' ends are connected by a covalent bond between the phosphate group and the sugar.

The 3' end of the DNA molecule is known as the "tail" or "tail end" because it is the end of the molecule that is furthest away from the double helix structure.

The 3' end is also referred to as the "hydroxyl end" because it contains a hydroxyl group. This hydroxyl group is important for certain metabolic processes such as DNA replication and transcription.

The 5' end of the DNA molecule is known as the "head" or "head end" because it is the end of the molecule that is closest to the double helix structure.

The 5' end is also referred to as the "phosphate end" because it contains a phosphate group. This phosphate group is important for certain metabolic processes such as DNA replication and transcription.

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The length and width of the swimming pool is 23.08.

What is length?

The term "length" refers to a measurement along an object's largest dimension. A portion of space, or volume, is occupied by a sample of material. Volume of an object can be determined by knowing the length of each side.

What is height?

The vertical distance between an object's top and bottom or its base and something above it is what is meant by the terms height, altitude, and elevation. Height is a vertical measurement, whether or not something is high.

2*6=4800

12=6400

=533^

=23.08

Therefore, the length and width of the swimming pool is 23.08.

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Thr IUPAC or systematic name for the compound given from the task above is an organic compound known as undecane.

Organic compounds simply refers to those groups of chemical substances which contains carbon and hydrogen. All organics substances within their respective homologous families has the same general characteristics. From the task given above, it contains 11 carbons atoms which is bonded to 24 hydrogen atoms. That is, why the systematic name of the compound C11H24 is undecane.

Homologous series is a family of organic compound which follows a regular pattern and in which successive members differs from one another by the molecular formula of CH₂. Below are some classes of homologous families:

In conclusion, the compund CCC(C)CC(C)C(C)CC given in the problem above belongs to an alkane family.

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According to the given statement 56.31g mass of H₂O, in grams, must react to produce 50. 00 g of O₂.

The volume in grams of one mole of a compound is its molar mass. The molar mass of a substance can be found by adding the molality of its constituent atoms, as demonstrated in this video. The computed molar mass can then be used to convert both mass and the quantity of moles in the substance.

2H₂O ---> 2H₂ + O₂

Step 1: calculating moles O₂

⇒For each mole O₂ we have 2 moles of H₂

1) (50.00g O₂)/(32.00g/mol O₂) = 1.563mol O₂

⇒For each mole O₂ we have 2 moles of H2, so we multiply moles of O₂ by 2 to get moles of H₂O

Step 2: Calculating moles H₂O

2) (1.563mol O₂)(2mol H₂O/1mol O₂) = 3.125mol H₂O

Step 3: Calculating mass H₂O

3. (3.125mol H₂O) * (18.01g/mol H₂O) = 56.31g H₂O

We need 56.31g H₂O to make 50.00g O₂.

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The 5.76 grams of MgBr₂ produced from the reaction of bromine and magnesium.

Balanced chemical equation

Mg + Br₂ ⇒MgBr₂

Number of moles of Mg and Br₂ present

n(Mg) = 1/24.3 = 0.0412 mol

n(Br₂) = 5/159.8 = 0.0313 mol

Checking the limiting reagent in the reaction.

Magnesium and Bromine react in 1:1 ratio

Then Limiting reagent will be bromine. The values of bromine will be used to calculate amount of magnesium bromide(Molar mass =5.76g).

0.0313 x 184.1 = 5.76 grams.

Hence, 0.0313 mole of bromine will produce 5.76 grams of magnesium bromide.

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Answer:

electron- neutron- nucleus- atom- solution compound

Explanation:

Answer:

Purines make up two of the four nucleobases in DNA and RNA: adenine and guanine and Pyramidines make up the other bases in DNA and RNA: cytosine, thymine.

Explanation:

Pyrimidines are heterocyclic compounds with  single  rings whereas purines are heterocyclic compounds with fused  ring. Among the given nitrogen bases, adenine is purine  and cytosine and thymine are pyrimidines .

In DNA molecule, the two strands are connected together like a stair case with steps. The steps here are called nitrogen bases. There are 4 different types of nitrogen bases in DNA molecules.

The nitrogen bases are namely, adenine, guanine, cytosine and thymine. The adenine of one strand is bonded to thymine of the other strand through 2 hydrogen bonds. Whereas, cytosine and guanine are connected by three hydrogen bonds.

Adenine and guanine are purine bases and thymine and cytosine are pyrimidine bases. The fused heterocyclic rings with an imidazole ring is called purines. Single ring heterocyclic bases are the pyrimidines.

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Your question is incomplete. But your complete question is as follows:

classify each molecule as a purine or a pyrimidine.

adenine

cytosine

thymine

Answer:

1. an electron moving around the nucleus

2. an electron moving on its axis

Explanation:

The best way to remember how atoms move is by comparing them to a solar system. Just like a solar system atoms have a core, in this case the nucleus, and each atom rotates around the nucleus just like planets revolve around a star. They also rotate just like a plant does.

My reflection on idea gas behavior is that:

The  way to design the investigation and plan to collect data is based on the true assumptions of :

The most difficult part of designing your investigation is the gas behavior at different point or levels.

When held at a fixed temperature, the volume of a given quantity of gas is inversely proportional to the pressure at which it is measured.

Note that An ideal gas is one that abides with the gas laws under all possible pressure and temperature conditions. The gas must adhere to the kinetic-molecular theory in its entirety to achieve this. The gas particles must have no volume and must not interact with one another in any way that may be considered appealing.

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Answer:

The demonstration involving plastic containers and food coloring was very memorable. This experiment helped me understand the concept of diffusion, which is the process by which molecules move from an area of higher concentration to a place of lower concentration. For example, this experiment showed me how the food coloring molecules move from the container with more food coloring to the container with less food coloring until the attention of food coloring is equal in both containers. This helped me understand how diffusion works in real-life.

Explanation:

The explanation of the reaction between the compound is here.

What is compound?

A thing that is composed of two or more separate elements is called compound.

Sol-There is no chemical reaction. Know the extent between to react to react and fair play mixing I too means iodine and potassium I Od um ordered solution solution and I could not React directly as such bad form poorly I owed eight iron like I five and I seven. They negatively charged iodide in the negatively charged how you died. All right, come and did come about charge donor. The neutral iodine charging accepted a solution of iodine, a solution of iodine and potassium iodide um added in water had the light orange brown color, light orange brown color, orange brown color. Once a mileage is added it from another city complex. When once a mileage in my load I added it from another city complex.

When once a mileage in my load I added it from another city complex. The police have cried. The police had cried, the police have cried act as a George donor charges and the police have died. And the poly iodide act as a except her. The new council looks absorbing light of a different wavelength than polly iodide and the color turn dark dark blue. The object structure are poorly added inside the am I late helix Alex is not clear. Are bulky and sit inside the policy crowds of glucose units and could not get out of date.

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The skeletal line-bond structure of (r)-1-ethyl-3-ethynyl-cyclohex-1-ene is as follows:

A disubstituted cyclohexene molecule contains an ethyl group on C1 and an ethynyl group on C3.

To represent the dash or wedge bond structure we have to first identify the asymmetric centers in the molecule.

An organic compound's skeletal structure was made up of a group of atoms that also are joined together to form the compound's fundamental structure. Chains, branches, and/or rings of bound atoms can make up the skeleton. Heteroatoms were skeletal atoms that are not carbon as well as hydrogen.

The asymmetric center in the cyclohexene molecule is C-3 in the cyclohexene so the dash and wedge structure can also be shown as follows:

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The arrangement of the elements from smallest atomic radius to largest atomic radius is S < Se < Na < K

The atomic radius of an element is a measure of the size of the atom of an element.

The atomic radius of an element is calculated as one-half the distance between the nuclei of two covalently bonded atoms of the element. Atomic radius is one of the properties of an atom that show periodicity.

The periodicity of elements is the regular variation of the properties of an element across a period and down a group.

The atomic radius of atoms of elements increases down the group and decreases across a period.

Considering the atomic radius of the given element:

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(a) Rate of reaction = 13.33 dm³/min.

(b) Assuming magnesium is the limiting reagent:

Reaction rate or rate of reaction is the rate at which a chemical reaction occurs and is defined as proportional to the increase in concentration of products per unit time and the decrease in concentration of reactants per unit time. Reaction rates can change dramatically.

Rate of reaction = Volume change/time

At 1.5 minutes volume of 20 dm³ H₂

So rate will be:

20/1.5 = 13.33 dm³/min.

Mg(s) + 2HCl(aq) → MgCl₂(aq) + H₂(g)

For moles of H₂:

n = M × V

Where, n = number of moles

M = Molarity (1.00 mol/dm³)

V = Volume (20 dm³)

n = 1.00 × 20

n = 20 moles

Since the mole ratio of Mg and H₂ is 1:1, the moles of Mg are 20 moles.

m = n × Mm

Where, m = mass

n = number of moles (20 moles)

Mm = molar mass of Mg (24.30 g/mol)

m = 20 × 24.30

m = 486 g

Powders react faster than blocks - they have a larger surface area and reactions occur on the surface, so they are faster.

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The complete question is as follows:

The graph below shows the volume of hydrogen evolved against time for the reaction of a piece of solid magnesium metal with 1.00 mol dm-3 hydrochloric acid, HCl(aq). Mg(s) + 2HCl(aq) → MgCl2(aq) + H2(g) (a) Deduce the rate of the reaction at time t = 1.5 minutes. (i) Assuming magnesium is the limiting reagent and the gas was collected at STP (i) Calculate the mass of the piece of magnesium metal used. (ii) Describe how the graph would have looked if the magnesium metal had been in powdered form.

Answer: Cold interstellar gas

Explanation:

These interstellar absorption lines are created when cold interstellar gas absorbs some of the radiation emitted by the distant star.

The 32.99 ml of 0.404 m Li₂CO₃ solution is required to react with 49.9 ml of 0.267 m HNO₃.

A portion of the Li₂CO₃ solution is taken and mixed with HNO₃.

The equation used when dealing with concentration is as follows;

M1v1 = M2v2

M1 = 0.404 M Li₂CO₃ solution

v1 = ?

M2 = 0.267 M HNO₃

v2 = 49.9 ml of HNO₃

substituting the values in the equation;

0.404 M  x V1 = 0.267 x 49.9 ml

V1 = 32.99 ml

a volume of 32.99 ml is taken from 0.404 M from Li2co3 solution and neutralized with  49.9 ml of 0.267 m HNO₃.

Hence, mixing of Li₂CO₃ and  HNO₃ is neutralization reaction.

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Yes. Solubility is 0.070 kg/L

Solution:

Solubility = mass / Volume

Solubility = (0.210kg)/(3L) = 0.070 kg/L

Solubility is defined as the maximum amount of a substance that will dissolve in a specified amount of solvent at a specified temperature. Solubility is a characteristic property of a particular solute/solvent combination, and different substances have very different solubilities.

Adding sugar cubes to your tea or coffee is a common example of a solution. The ability of a sugar molecule to dissolve easily is called solubility. The term solubility can therefore be defined as the property of a substance to dissolve in a particular solvent. Water solubility is a measure of the amount of a chemical that can be dissolved in water at a given temperature.

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9-88 An easy goal Air with a maximum and minimum temperature od 27°C and 727°C is used in the Brayton cycle.

A thermodynamic cycle called the Brayton cycle is employed in various heat engines. In particular, several jet engines and gas turbine engines utilise it. The cycle entails compressing outside air, combining it with fuel, and then lighting the resulting mixture, which expands and generates power.

The thermodynamic cycle types Occur in order and Brayton cycle both exist. The main distinction between the Rankine cycle and the Sco2 cycle is that the former is a cycle of vapour, while the latter is a cycle of vapour and liquid phases.

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Answer:

The nucleus

Explanation: bohr tells us that the electrons which have a negative charge clicle the orbits in specific nucleus

The dissociation equations are shown as;

a) [tex]HCl ------ > H^+ + Cl^-[/tex]

b) [tex]H C_{2} H_{3}O_{2} ---- > C_{2} H_{3}O_{2} ^- +H^+[/tex]

C) [tex]NH_{4} ----- > NH_{3} + H^+[/tex]

D) [tex]C_{6} H_{5} NH_{3} ^+ ------- > C_{6} H_{5} NH_{2} + H^+[/tex]

E) [tex][Al(H_{2} O)_6}] ^{3+} ------ > Al^{3+}[/tex]

The term dissociation has to do with the procedure by which a substance can be broken up into its components. The components of a substance are those that have to come together so as to form the compound.

When the compound is to be broken up, the components that came together to make up the compound can broken up and then we have the original compounds tat we have at the start of the reaction.  In this case, the decomposition equations have been shown with the exclusion of water.

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Buffer is a solution used to stabilize the pH (acidity) of a liquid.

A buffer system in chemistry is a type of solution that is able to resist changes in its pH when small amounts of an acidic or basic substance is added to it.

Many chemical reactions are carried out at a constant pH. In nature, there are many systems that use buffering for pH regulation

According to this question, a buffer system of hydrofluoric acid, HF, and its salt is given. The purpose of the buffer system is to stabilise the pH of the hydrofluoric acid solution.

Also, hydroxide ion (OH) can be added to the solution to neutralise the acid content of the solution as characterized by the presence of hydronium ions (H₃O⁺).

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The formation of molecule can easily be shown by drawing Lewis dot structure. Since atom's Lewis dot structure has three dots. Therefore, the valence electron around Iodine is 7, out of 7 electron, 5 electron will make single bond with one electron of chlorine.

Lewis dot structure is a way to represent the valence electron of an element in the form of dot.

These are mainly beneficial in understanding the chemical formula of covalent compound. The valence electron around Iodine is 7, out of 7 electron, 5 electron will make single bond with one electron of chlorine.

Therefore, the valence electron around Iodine is 7, out of 7 electron, 5 electron will make single bond with one electron of chlorine.

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The percentage yield of the given reaction is 77.33%.

What is percentage yield?
Reactants frequently produce fewer product quantities than predicted by the chemical reaction's formula. The percentage of a theoretical yield that's been produced in a reaction is calculated using the percent yield formula. Working through a stoichiometry problem yields the theoretical yield, which is the ideal quantity of the final product. The actual yield is determined by calculating the volume of the product formed. We can determine the percentage yield by dividing the actual yield by the theoretical yield.

Moles is calculated by using the formula:
Moles of Ammonia:
Given mass of ammonia = 150g
Molar mass of ammonia = 17 g/mol
Putting values in above equation, we get:

Moles of Oxygen
Given mass of oxygen = 150g
Molar mass of oxygen = 32 g/mol
Putting values in above equation, we get:
For the given chemical equation:

By Stoichiometry,
5 moles of oxygen reacts with 4 moles of ammonia.
So, 4.6875 moles of oxygen will react with =  of ammonia
As, moles of ammonia required is less than the calculated moles. Hence, ammonia is present in excess and is termed as excess reagent.
Therefore, oxygen is considered as a limiting reagent because it limits the formation of products.

By Stoichiometry of the given reaction:
5 moles of oxygen gas produces 4 moles of nitric oxide
So, 4.6875 moles of oxygen gas will produce =  of nitric oxide

Now, to calculate the theoretical amount of nitric oxide, we use equation 1: Molar mass of nitric oxide = 30 g/mol
 Given mass of nitric oxide = 112.5 g
Now, to calculate the percentage yield, we use the formula:
Experimental yield = 87 g
Theoretical yield = 112.5 g
Putting values in above equation, we get:
Hence, the percentage yield of the given reaction is 77.33%.

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Any of the series of unsaturated hydrocarbons containing a double bond, including ethylene and propylene are called Alkenes.

What are Unsaturated Hydrocarbons?

Unsaturated hydrocarbons are organic compounds that contain one or more double or triple bonds between carbon atoms. They are also known as alkenes or alkynes depending on the number of double bonds present. Examples of unsaturated hydrocarbons include ethene (C2H4), propene (C3H6) and butadiene (C4H6).

Define Alkenes?

Alkenes are a class of hydrocarbons that contain a carbon-carbon double bond. They are also known as olefins or unsaturated hydrocarbons. Alkenes are used in the production of polymers, fuels, lubricants, and solvents.

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Peroxidase activity increases and then decreases due to a change from a moderately acidic environment (pH near 6) to a basic environment.

Peroxidase is an enzyme found in a wide variety of organisms, from plants to humans to bacteria. Its function is to decompose hydrogen peroxide (H₂O₂). Hydrogen peroxide is one of the toxins produced as a by-product of using oxygen to breathe. (The fact that hydrogen peroxide is toxic makes it useful in first aid kits.

Peroxidase activity is strongly influenced by pH factors. Peroxidase works best at pH 7, but increasing or decreasing pH adversely affects its activity. Therefore, when moving from a weakly acidic environment close to pH 6 to a basic one, the peroxidase activity increases as the neutral environment approaches and decreases as the basic environment approaches, so that the peroxidase activity varies with the pH of the solution.

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The complete question is as follows:

Researchers investigated the influence of environmental pH on the activity of peroxidase, an enzyme that catalyzes the conversion of hydrogen peroxide to water and oxygen gas. In an experiment, the researchers added a hydrogen peroxide solution containing guaiacol to several identical test tubes and adjusted the solution in each test tube to a different pH . The researchers included the guaiacol because it caused the solutions to change color as the reactions proceeded, which the researchers relied on for measuring reaction rates. Finally, the researchers added the same amount of peroxidase to each test tube and measured the rate of each reaction at 23°C . The results of the experiment are represented in Figure 1.

Based on Figure 1, which of the following statements best predicts the effect that a change from a moderately acidic environment ( pH near 6) to a basic environment will have on peroxidase activity?

answer choices

Peroxidase activity will decrease.

Peroxidase activity will increase.

Peroxidase activity will stay the same.

Peroxidase activity will increase at first and then decrease.

The 39.2g grams of sulfur (s) are needed to react completely with 246 g of mercury (hg) to form hgs.

What is mole?

The term "mole" refers to the quantity of a substance that contains the same number of elementary particles (ions, molecules, or atoms) as there are carbon atoms.

What is mass?

A measure of the fundamental attribute of all matter, inertia, in a numerical form. It is essentially the resistance a body of matter offers to a change in its speed or location as a result of the application of a force. A body's mass determines how much change it produces, with larger bodies producing smaller changes.

Therefore, 39.2g grams of sulfur (s) are needed to react completely with 246 g of mercury (hg) to form hgs.

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Answer:

36 electrons

Explanation: