Ideal gas law is valid only for ideal gas not for vanderwaal gas. 6.4g of KClO[tex]_3[/tex] are needed to produce 5.00 L of O₂ at standard temperature and pressure.
What is ideal gas equation?Ideal gas equation is the mathematical expression that relates pressure volume and temperature.
Mathematically the relation between Pressure, volume and temperature can be given as
P×V=n×R×T
where,
P = pressure of oxygen gas= 1 atm
V= volume of oxygen gas = 5.00 L
n =number of moles of oxygen gas =?
T =temperature of oxygen gas =298K
R = Gas constant = 0.0821 L.atm/K.mol
Substituting all the given values, we get
1 atm×5.00 L=n× 0.0821 ×298K
n=5.00÷24.4=0.20moles
mass of oxygen= number of moles of oxygen× Molar mass of oxygen
mass of oxygen=0.20× 32
mass of oxygen=6.4g
Therefore, mass of KClO[tex]_3[/tex] needed is 6.4g.
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which of the following compounds forms a racemic mixture of an optically active product when it is hydrogenated? a) i b) ii c) iii d) iv e) v
The compound that forms a racemic mixture of an optically active product when it is hydrogenated is 2-butanol.
What is optically active in a racemic mixture?
A chiral molecule is one that has two enantiomers, or nonsuperimposable mirror images of one another. An equal mixture of each of the two enantiomers of a particular chiral molecule is referred to as a racemic mixture. A racemic combination has the intriguing property of being optically inactive, which means it does not rotate plane polarized light. Actually, to be more precise, it rotates light, but it does so by an equal amount in both directions, so the net rotation is zero.To learn more about racemic mixture, follow the link https://brainly.com/question/27835707
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Potassium hydrogen phthalate, khp, is used as a primary standard for determining the concentration of a solution of naoh by titration. If the khp has not been dried before weighing, the calculated molarity of the naoh would be.
If the KHP was not dried before weighing, the calculated NaOH molarity would be higher than the actual value because the apparent mass of KHP includes water.
What is KHP ?KHP is potassium hydrogen phthalate. Stable in air and easy to weigh, it is commonly used as a primary standard in pure form for sodium hydroxide titration.However, if the KHP is not dry enough, the calculated KHP molarity will be higher than the actual value because the mass of water is included as part of the KHP mass.Again, the molar ratio of reaction between KHP and NaOH is 1:1. Therefore, if the molar concentration of KHP is higher than the actual value, the molar concentration of NaOH is also higher than the actual value.To know more about potassium hydrogen phthalate visit:
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In water, a substance that ionizes completely in solution is called a? semiconductor nonelectrolyte weak electrolyte nonconductor strong electrolyte
A Strong Electrolyte in water is a chemical that totally ionizes in solution. An electrolyte that absorbs almost entirely in water is said to be a strong electrolyte.
Strong electrolyte: What is it?A solution or solute that totally, or nearly completely, ionic compounds or decomposes in a solution is referred to as a strong electrolyte. In the solution, these ions act as effective conductors of electric current. A substance that is a good electrical conductor while in aqueous solution was the original definition of a "strong electrolyte."
Which electrolyte is the stronger, weaker?An electrolytes that dissolves almost entirely in water is said to be a strong electrolyte. Hydrogen chloride is a good illustration of the a strong electrolyte (HCl). An electrolyte that just doesn't entirely dissolve in water is referred to as a weak electrolyte.
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How do you know if a new substance is formed in a chemical equation?
The indication written identify the new substance is formed in a chemical reaction.
A chemical reaction happens when substances break down or combine to form a one or more new substances. the substance take part in a chemical reaction initially called as reactants and the substance forms at the end of the chemical reaction is called as products.
The sign or indications of new substance is formed are:
formation of ppt change in colorevolution of gasformation of bubbleschange in properties change in odorThe phase change is not consider as the chemical change.
Thus, The indication written identify the new substance is formed in a chemical reaction.
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does adding boiled, deionized water to the titrating flask to wash the wall of the erlenmeyer flask and the buret tip increase, decrease, or have no effect on the ksp value of the ca(oh)2? explain.
Addition of boiled, deionized water to the titrating flask to wash the wall of the erlenmeyer flask and the buret tip will have no effect on the Ksp value of ca(oh)2.
There will be no effect on the Ksp value as boiled deionised water is not able to alter the number of hydronium and hydroxide ions. As no change in the ions happen so there will be no change in Ksp value. The equilibrium constant for a solid material dissolving in an aqueous solution is the solubility product constant, Ksp. It stands for the degree of solute dissolution in solution. A substance's Ksp value increases with how soluble it is.
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What is the weighted average of a nail in the sample data given?
The weighted average of the nail in accordance with the given data is 11.176g.
How to calculate weighted average?Weighted average is an arithmetic mean of values biased according to agreed weightings.
The weighted average of the nail in the image above can be calculated by multiplying the decimal abundance with the mass of the nail, then summed up as follows;
Weighted average = (decimal abundance × mass 1) + (decimal abundance × mass 2)
Weighted average = (0.12 × 3.3) + (0.88 × 12.25)
Weighted average = 0.396 + 10.78
Weighted average = 11.176g
Therefore, 11.176g is the weighted average of the nail
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Which statement describes the particles that make up a raindrop?
Question 3 options:
They stay close together and vibrate in place.
They are far apart and move freely from one place to another.
They stay close together and slip past one another.
They are far apart and bounce off one another.
The statement that describes the intermolecular forces in the raindrop is that; they stay close together and slip past one another.
What are intermolecular forces?The term intermolecular forces has to do with the kind of force that holds the molecules of a substance together. There are several kinds of intermolecular forces and the strength of the bond depends on the kind of the interaction that goes on.
In this case, we have a rain drop. We have to know that the rain drops are liquids and the intermolecular forces in liquids is such that the molecules are able to slide past each other.
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what is the moment of inertia ia of particle a? what is the moment of inertia of particle a? mr2 9mr2 10mr2 undefined: an axis of rotation has not been specified.
The moment of inertia of a particle is mr²
Moment of inertia is a quantitative measure of the rotational inertia of a body in physics - i.e. The resistance that a body exhibits to changing its rotational speed about its axis by the application of torque (torque). Axes can be internal or external and can be fixed or unfixed.
In general, the moment of inertia of a uniform body is calculated as the product of the square of the distance (r²) from the axis of rotation and its mass. The flywheel is a heavy mass attached to the engine's crankshaft is one example of the moment of inertia
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if he(g) has an average kinetic energy of 4570 j/mol4570 j/mol under certain conditions, what is the root mean square speed of cl2(g) molecules under the same conditions?
The root mean square speed of Cl₂ molecule is 11.34 cm/sec.
Solution
We need to calculate the root mean square speed of Cl₂ molecule.
Average kinetic energy = RT
where,
R = Molar gas constant
T = absolute temperature in Kelvin.
Given,
Average kinetic energy = 4570 J/mol
R= 8.314 J/mol/K
So, T = (4570 × 2)/(3 × 8.314)
⇒ T = 366.45 K
Root mean square velocity = √(3RT/M)
For, Cl₂ molecule,
M = 71 g/mol
T = 366.45 K (as condition is same as previous)
Therefore, Root mean square velocity = 11.34 cm/sec
Hence, Root mean square velocity = 11.34 cm/sec.
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Which factor does not influence whether a substance will be a liquid at room temperature and normal atmospheric pressure?
Surface tension does not influence whether a substance will be a liquid at room temperature and normal atmospheric pressure.
What is Surface tension?Surface tension is the propensity for liquid surfaces that are at rest to condense into the smallest surface area. Razor blades and insects, which have a density greater than that of water, can float on the surface of the water without even becoming partially buried because to surface tension. Cohesive interactions between the liquid's molecule's cause the surface tension to develop. The molecules at the center of the liquid are surrounded by other molecules on both sides. Because molecules are pulling against one another equally in all directions, there is no net force.The two are equivalent, but when discussing energy per unit of area, surface energy is frequently used because it is a more inclusive term that includes solids. Surface tension can represent either surface stress or surface energy in materials science.To learn more about Surface tension refer to:
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Determine the work done in l ⋅ atm when a sample of gas expands from 1. 00 l to 2. 50 l against an external pressure of 0. 750 atm.
The work done by the gas to expand is 1.125 Joules.
The work done by the gas in expanding is given by,
W = P(V₂-V₁)
Where,
W is the work done,
P is the pressure,
V₁ is the initial volume,
V₂ is the final volume.
The final volume of the gas is 2.50L and the initial volume is 1 L, while the external pressure is 0.750 atm.
Putting values,
W = 0.750(2.50-1)
W = 1.125 Joules.
The work done by the gas is 1.125 Joules.
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Calculate the number of moles in 12.50 g of benzene C2H5OH.
The number of moles of Benzyl alcohol is 0.115 moles.
Number of moles can be also told in terms of Avogadro's number with is 6.023 × [tex]10^{23}[/tex]. It can be calculated for atoms, molecules, ions or others as well. The mole is a convenient unit to use because of the great number of atoms, molecules, or others in any substance. The concept of the mole helps to put quantitative information about what happens in a chemical equation on a macroscopic level. So it is used widely.
Molecular mass is nothing but the sum of atomic mass of all the element present in the molecule. In the above given question we have to calculate the number of moles of the molecule by using the given weight. To do so we use the below formula;
Number of moles = given weight
Molecular mass
⇒ 12.50 = 0.115 moles
108.14
Therefore the number of moles in 12.50 g of benzene C2H5OH is 0.115 moles
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what's the frequency of a microwave thats 6 cm in length
Can someone please help me with question 4&5 please
The pH of the solution is obtained is basic pH, hence the solution is a base and it will change the color of Bromocresol from yellow to blue. Phenolphthalein is colorless in neutral and acidic solution but it gives basic pink color in basic solution.
What is pH?pH of a solution is the measure of the H+ ion concentration. Mathematically it is negative logarithm of H+ ion or hydronium ion concentration. It measures how acidic or basic the solution is.
The pH of the solution is obtained as 12.2 and hence the solution is basic since pH above 7 is basic solutions. Bromocresol blue shows the color change from yellow to blue in the pH range of 3 - 5.4. Hence above a pH of 5.4 it shows blue color.
Phenolphthalein shows a color change from 8 - 9.5 pH range from colorless to pink. Hence, it gives pink color for the given solution.
Let AOH be the solution and when it dissociates in water it gives OH- ions as per the Arrhenius theory. Based on this theory we cannot say that it is monoprotic or diprotic ,however it flourish all the OH- ions to water.
[tex]\rm AOH \rightarrow A^{+} +OH^{-}[/tex]
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an unknown compound that is insoluble in water, but dissolves in a solution of sodium carbonate and produces bubbles is almost certainly a .
Carboxylic acid is that compound.
What is Carboxylic acid?
Carboxylic acids are the most important functional group in C=O. This type of organic chemical can be formed through several processes; for example, some carboxylic acids, such as citric acid, lactic acid, or fumaric acid, are produced through fermentation; the majority of these carboxylic acids are used in the food sector.
A carboxylic acid has the generic formula R-COOH, where COOH refers to the carboxyl group and R refers to the rest of the molecule to which this group is linked. There is a carbon in this carboxyl group that has a double connection with an oxygen atom and a single bond with a hydroxyl group.
When combined with metal carbonates, carboxylic acid produces salt. For example, when acetic acid reacts with sodium carbonate, the results are sodium acetate, carbon dioxide, and water. The salt generated will be the same as that formed when acetic acid reacts with a simple metal.
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a compound with the chemical formula c6h8 reacts with h2/pt to give a product with the formula c6h12. which of the following options correctly interpret these data? select all that apply.
Both react with hydrogen gas in presence of palladium gives a cyclic compound with a molecular formula of C6H12.
Cyclic compound is also referred to as ring compound or structure, in the field of chemistry where two or more atoms of a compound are attached together to form a ring. The ring may vary in size according to the number of atoms present and how branched the compound is.
Some of the examples of ring structure is the benzene ring, phenol and etc. Cyclic compounds show various combinations of stereochemical features, including conformations, stereocenters, chirality, enantiomers, diastereomeric, and another form of cis/trans stereoisomerism.
In the given condition C6H8 reacts with hydrogen gas in presence of palladium and gives rise to a cyclic compound with a formula C6H12.
Complete question: -
provide a possible structure for a compound with formula C6H8, given that it reacts with excess H2/Pt to give C6H12. what is (are) the product(s) in the hydrogenation of your substance? draw the structure(s) for the product(s) as well (including the stereochemistry).
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how does the second law of thermodynamics explain the diffusion of substances? (explain why particles are more likely to move from high to lower concentration using entropy in your answer.)
The second law of thermodynamics explain the diffusion of substances is that trend of randomization. Diffusion of particles of solute from higher concentration to lower concentration lead to increase in entropy.
The second law of thermodynamics explain the trend of randomization or an increasing in entropy. if the concentration of substances on both sides are same then the distribution is random is more than the concentration is unequal. Diffusion of as substance from higher to lower leads to increase in entropy ,. when the concentration decreases entropy increases.
Thus, The second law of thermodynamics explain the diffusion of substances is that trend of randomization. Diffusion of particles of solute from higher concentration to lower concentration lead to increase in entropy.
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If 50. Ml of 1. 0 m naoh is diluted with distilled water to a volume of 2. 0 l, the concentration of the resulting solution is.
The concentration of the resulting solution is 0.025 M.
What is molar concentration?Molarity is a measure of the concentration of a chemical species, especially a solute, in solution and is expressed as the amount of substance per unit volume of solution. The most commonly used unit of molarity in chemistry is moles per liter in SI units using the unit symbols mol/L or mol/dm³.
For the given case,
Concentration of NaOH (M₁) = 1 M
Volume of NaOH (V₁) = 50 ml or 0.05 L
Concentration of solution (M₂) = ?
Volume of solution (V₂) = 2 L
Since, M₁V₁ = M₂V₂
1 × 0.05 = M₂ × 2
M₂ = 0.025 M
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Fill in the coefficients that will balance the following reaction: KI + Pb(NO3)2 → PbI2 + KNO3
Answer:
2KI + Pb(NO3)2 = PbI2 + 2KNO3
Explanation:
To make a chemical equation to be balanced,two things would be a factor:
1.The same radicals on both side of equation.
2.The radical on only one side of equation.
Since the equation has radicals on both side,we count it as one unit.Then balance the most complex,Pb(NO3)2 and KNO3 in this case,and the least complex on the last.
I know thst it is really hard at first to solve it but follow the instuction carefully.
Please rate it,Thanks.
Help me with this answer please
Option D. The result of a chemical change is a different chemical composition, In a physical change the chemical composition remain the same.
A chemical change happens when one chemical substance is transformed into one or more special materials, which includes when iron will become rust. Chemical changes occur thru the system of chemical reactions, and the resulting materials have extraordinary houses because their atoms and molecules are arranged in a different ways.
Physical changes are adjustments affecting the shape of a chemical substance, but not its chemical composition. physical modifications are used to split combos into their factor compounds, however, can not generally be used to separate compounds into chemical factors or less difficult compounds
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The answer is the result of a chemical change is different chemical composition, in physical change the chemical composition remains the same.
Physical change is a temporary change. A chemical change is a permanent change. A physical change impacts simplest bodily residences i.e. shape, size, etc. Chemical change each physical and chemical residences of the substance including its composition. A bodily change entails very little to no absorption of electricity.
A chemical change is a trade of materials into another, new materials with distinctive properties and one or a couple of new materials are fashioned. It outcomes when a substance combines with another to form a new substance.
Changes in the length or shape of count are examples of physical change. Physical changes include transitions from one nation to every other, consisting of from strong to liquid or liquid to gasoline. Cutting, bending, dissolving, freezing, boiling, and melting are a number of the tactics that create physical adjustments.
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You measure the mass and volume of a sample of metal and record the values. You double the mass of the sample and find the new volume of this larger sample. How would the new volume compare to the original volume?.
Mass divided by volume equals density (D = m/v). The increased volume is double what the old volume was.
How do you calculate the metal sample's volume?The displacement method can be used to determine the volume of an oddly formed metal. Measure the amount of water in a beaker after filling it halfway. Record the new amount of water after inserting the metal into the liquid. To calculate the volume of the metal, deduct the final volume from the original volume of water.
If you have a larger portion of a material, what happens to its density?A material's density reduces as it expands because it takes up more space. All types of matter experience this phenomenon.
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do xe gas atoms experience attractions to each other? if so, how do these attractions compare to the attractions between kr atoms.
Xe gas atoms do experience attraction to each other, that is called a London dispersion forces. Compared to Kr gas atoms, Xe has stronger London dispersion forces, thus Xe is more difficult to boil.
What is London dispersion force?London dispersion force is an intermolecular force, the weakest force that is only temporarily active when the electrons in two adjacent atoms occupy positions that make the atoms form temporary dipoles. London dispersion forces strength is very dependent on the molecular weight. Xe has heavier molecules than Kr, so Xe also has stronger London dispersion forces. As a result, Xe is more difficult to boil than Kr.
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which of the following compounds is a meso compound? multiple choice (2r, 3s)-2,3-dichlorobutane (2r, 3r)-2,3-dichlorobutane (2r, 3s)-3-chloro-2-butanol (2r, 3r)-3-chloro-2-butanol
(2R,3S), 2,3-dibromobutane (2R,3R), 2,3-dibromobutane Superposition of mirror images is not feasible yet stereoisomers can arise.
A superimposable mirror image can be created using (2R,4S)-2,4Dibromopentane.
Non-superimposable mirror-image versions of the 2,4 dibromopentane ring (2R,4R).
What do you understand by Stereoisomerism?Stereoisomerism, also known as spatial isomerism, is a type of isomerism used in stereochemistry in which molecules with identical chemical structures and order of linked atoms (constitution) change in the three-dimensional spatial orientations of their atoms. In contrast, structural isomers have the same chemical formula but have different bond arrangements or bond orders. Stereoisomers of one another's molecules, by definition, represent the same structural isomer.
What is a configurational stereoisomer?A stereoisomer of a reference molecule that has the opposite configuration at a stereocenter is known as a configurational stereoisomer (e.g., R- vs S- or E- vs Z-). This indicates that only disrupting covalent bonds to the stereocenter, for as by inverting the configurations of some or all of the stereocenters in a compound, will allow configurational isomers to be interconverted.
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A white salt containing an unknown metal has the formula mcl and gives a lilac flame during a flame test. The salt could be.
The salt could be potassium (K) and the salt will be KCl.
What is a flame test?A flame test is a qualitative test used in chemistry to determine the identity or putative identity of metal or metalloid ions in ionic compounds. When a compound is placed in the flame of a gas burner, it can emit a characteristic color visible to the bare eyes. The combustion test is used to identify the presence of relatively few metal ions in a compound. Not all metal ions give flame color. For Group 1 compounds, a flammability test is usually the easiest way to identify the metal you are using. For other metals, there are other simpler methods that are usually more reliable, but the combustion test can provide useful clues as to where to look. The color will change to yellow.
Potassium burns with a purple or light purple color, also known as lilac flame.
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Compare and contrast a solution that has a ph less than seven, greater than seven and equal to seven.
The solution having PH less than 7 is slightly acidic, PH equals to 7 is considered to be neutral and the one more than 7 is basic.
What is PH and what is the contrast in the PH of the solution have great PH and low PH?PH is the hydrogen ion concentration in the solution determining the acidity and basicity of the solution.Here the question is asked of the solution that has a PH less than seven, greater than seven and equal to seven.So the solution having PH more than 7 is basic , the solution having PH equals to 7 is considered to be neutral and the solution having PH less than 7 is considered to be acidic.When the PH of the solution is 2 or 3 then the solution is considered to be highly acidic.When the PH of the solution is exactly and precisely 7 then the solution is neutral.To know more about PH visit:
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ru3 express your answer in condensed form in order of increasing orbital energy as a string without blank space between orbitals. for example, [he]2s22p2 should be entered as [he]2s^22p^2.
Electronic configuration for Ruthenium is:
[tex]Ru: [Kr]4d^{7}5s^{1}[/tex]
Electronic configuration: A neutral element's total number of electrons is represented by its electronic configuration. To get the total number of electrons in an atom, we sum all the superscripts.
As a result of the electrons being filled in accordance with Afbau's rule in sequence of increasing energies, the electronic configuration in terms of the configuration of noble gases is as follows:
[tex]Ru : [Kr]4d^{7} 5s^{1}[/tex]
Ruthenium is transition element with atomic number 44 and thus the nearest noble gas present is Krypton with 36 electrons.
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Use the titration curve for the weak acid to calculate the ph of a 0. 150 m solution of that weak acid. Round the pka to the nearest whole number for the calculation, and enter your answer for the ph to two significant figures.
The titration curve reveals the pKa of a weak acid Here, as an example, we have selected acetic acid (CH 3 COOH) as the weak acid and it is titrated against a strong base NaOH.
Explain titration curve.
Titrations are frequently documented on graphs known as titration curves, where the volume of the titrant is typically the independent variable and the pH of the solution is the dependent variable (because it changes depending on the composition of the two solutions).
The graph's equivalence point is where the titrant has completely neutralised the initial solution, which is often an acid (usually a base). It can be calculated precisely by calculating the points of inflection (where the graph changes concavity) and the second derivative of the titration curve, but in most cases, a straightforward visual inspection of the curve will do. In the right-facing curve,
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Sam prepares a solution of sodium chloride with a concentration of 8 g/dm3. If he only used 2 g of sodium chloride, what volume of water did he dissolve it in, in cm3?.
The amount of water for 2 g of sodium chloride with a concentration of [tex]8g/dm^{3}[/tex] is 250[tex]cm^{3}[/tex]
The mass of the solute in relation to the solution has been defined as concentration. There are many other ways to indicate concentration, including density, molarity, molality, etc.
The specified solution has been concentrated. It has been reported that [tex]8g/dm^{3}[/tex] sample were present in a solution with a volume of 1 cubic decimeter.
Quantity of water
For a solution of 2 grams of sodium chloride, the volume of water was calculated as follows:
8 g = 1 [tex]dm^{3}[/tex]
Therefore, 2g = X
X= 2*1/8
X= 0.25 [tex]dm^{3}[/tex]
For 2 g of solution, 0.25 cubic decimeters of water were used.
In cubic centimeters, the decimeter cube has been assigned the following values:
1 [tex]dm^{3}[/tex] = 1000 [tex]cm^{3}[/tex]
0.25 [tex]dm^{3}[/tex] = Y
Y= 0.25*1000/1
Y= 250 [tex]cm^{3}[/tex]
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which one of the following is not true concerning diels-alder reactions? multiple choice the reaction is stereospecific. the reaction mechanism has only one step. the reaction mechanism involves a resonance stabilized carbocation. the diene must be a conjugated diene.
The Diels-Alder reaction mechanism involves a resonance stabilized carbocation is not true.
What id Diels-Alder reaction?
A Diels-alder reaction is made up of two components i.e
i - Diene which is made up of two adjacent pi bonds.
ii - dienophile which has atleast one pi bond.
In this Diels-Alder reaction, two sigma bonds and one pi bond are created while three pi bonds are broken every single time.
In Diels-Alder reaction, diene are always conjugated.
The Diels-Alder reaction is always stereospecific which means that both the diene and the dienophile's attached substituents maintain their stereochemistry throughout the reaction.
The Diels-Alder reaction is a concerted reaction which means that it always takes place in one step.
Hence, as all the other options are true we can say that the mechanism involves a resonance stabilized carbocation is not true.
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It is untrue that a resonance stabilised carbocation is involved in the Diels-Alder reaction mechanism.
What id Diels-Alder reaction?
Diels-Alder reactions consist of two parts, namely
two adjacent pi bonds make up the compound I - diene.
Dienophile with at least one pi bond is ii.
Three pi bonds are always broken in this Diels-Alder reaction, but two sigma bonds and one pi bond are always formed.
The dienes used in the Diels-Alder reaction are always conjugated.
The attached substituents to both the diene and the dienophile maintain their stereochemistry throughout the Diels-Alder reaction because it is always stereospecific.
The Diels-Alder reaction always proceeds in a single step because it is a concerted reaction.
We can therefore conclude that the mechanism involving a resonance stabilised carbocation is untrue because all of the other options are true.
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What’s the answer for this question in chemistry
Answer:
All Alkali metals form +1 cations
Noble gases do not form ions
Halogens form -1 anions
Alkaline Earth metals form +2 cations
chalcogens forms -2 anions
