There will be variances between isotopes, however by ignoring these and using the avg mol wt of N2 = 28 and Xe = 132; Rate(N2)/Rate(Xe) = sqrt (132/28) = 2.17
What an isotope is instead ?Isotopes are atoms with the same quantity of protons but differing numbers of neutrons. They differ in mass, which affects their physical characteristics even if they have nearly identical chemical makeup.
What makes anything an isotope?There are three known one-proton nuclei that have 0 neutrons, 1 neutrons, and 2 neutrons, respectfully. They are known as hydrogen isotopes (first from Greek isos, which means "same," and topos, which means "place") since they all occupy the same location in the periodic chart that is designated for atomic number 1.
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why is it necessary to determine the wavelength of maximum absorbance (aka λmax) of the copper sulfate solution before the absorbance of the five standard solutions and the unknown are measured
It is necessary to determine the wavelength of maximum absorbance (aka λmax) of the copper sulfate solution before the absorbance of the five standard solutions because this helps in getting the molar concentration of the unknown solution.
In the absorbance vs wavelength graph for a solution of copper sulfate notice that solutions absorb strongly from approximately 600 to 800 nm, with the maximum absorbance is around 750 nm. Thus in an experiment, we would choose a wavelength within that range. There is an vital distinction between the color of the light we observed reflected and the color the light absorbed. A wavelength of 750 nm indicates to red light, while a solution of copper sulfate appears to be blue. Copper sulfate solution reflects or transmits blue light, but absorbs red light.
Higher absorbance of the wavelength provides higher sensitivity observes at a wavelength of maximum absorbance (aka λmax) that helps to get the molar concentration of the unknown solution.
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Commercial methods for making fatty acid methyl esters (FAMEs): • Base-catalyzed transesterification of the oil with ________________.
Commercial methods for making fatty acid methyl esters (FAMEs). Base-catalyzed transesterification of the oil with Sodium Methoxide.
What is FAME used for?The generic chemical term for biodiesel derived from renewable sources is Fatty Acid Methyl Ester. It is used to supplement or replace mineral diesel and gas oil, which are used to power on- and off-road vehicles as well as static engines.It is formed during the biodiesel production process when vegetable oils and animal fats are transesterified. In the presence of a catalyst, usually potassium hydroxide, these high molecular weight oils and fats react with short chain alcohol to produce lower molecular weight esters (FAME).Transesterification is the process of separating the three alkoxy groups from the triglyceride's glyceryl backbone. As a byproduct of the reaction with the alcohol, three lower molecular weight esters are formed. The catalyst in the reaction is potassium hydroxide.To learn more about Fatty Acid refer :
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In the Introductory Activity, the developing solvents were 2% sodium chloride aqueous solution and 2% isopropyl alcohol aqueous solution. Draw separate molecular diagrams of how sodium chloride and isopropyl alcohol would interact in water. Identify the types of intermolecular attrac- tions within each diagram.
the developing solvents were 2% sodium chloride aqueous solution and 2% isopropyl alcohol aqueous solution
What occurs if you combine salt and rubbing alcohol?Isopropyl alcohol can be "salted out," which uses salt to remove water from the substance and thereby boosts its potency. When salt is added to water, it dissolves, but is insoluble in isopropyl alcohol, which causes the water to become heavier and sink to the bottom while the alcohol floats to the top.
Salt and alcohol can they be dissolved?Salt and alcohol do not interact, despite the fact that water and alcohol do. The solution becomes salty when salt is added, but the salt dissolves in the water but not the alcohol.
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Make a claim about whether air is matter. Support the claim with evidence and explain your reasoning
Answer: Yes
Explanation:
Air is matter because it takes up space, has weight and is composed of particles.
yet, despite the similarity in their appeareance, these two substances differ greatly in their porperties, since one is a molecular solid and the other is an ionic solid. how do the properties differ and why?
Molecular solid have covalently bonded atoms in it whereas Ionic solid have electronic bonds between its atoms..
We employ the octet rule, which states that all atoms in a compound are expected to comply by, to confirm the accuracy of any chemical structure. Every atom in the carbon IV oxide model precisely complies with the octet rule. The valence shell of each atom in the molecule is surrounded by eight electrons. We can therefore conclude that this structure is accurate given the total number of bonds and electrons, as well as the fact that CO₂ has sixteen valence electrons.
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at 50.14 k a substance has a vapor pressure of 258.9 torr. calculate its heat of vaporization in kj/mol it if has a vapor pressure of 161.2 torr at 277.5 k
At 50.14 k a substance has a vapor pressure of 258.9 torr. its heat of vaporization in kJ/mol it if has a vapor pressure of 161.2 torr at 277.5 k is
given that :
temperature T1 = 50.14 K
pressure P1 = 258.9 torr
temperature T2 = 277.5 K
pressure P2 = 161.2 torr
using the Clausius Clapeyron , we get :
ln ( P1 / P2 ) = - ΔH / R (1/ T1 - 1/T2)
ln ( 258.9 / 161.2 ) = - ΔH / 8.314 ( 1/ 50.14 - 1 / 277.5 )
ΔH = 41.83 kJ/ mol
The heat of vaporization ΔH = 41.83 kJ/ mol.
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a balloon is filled to a volume of 1.75 l with 3.50 moles of gas at 25 °c. with pressure and temperature held constant, what will be the volume of the balloon if 0.25 moles of gas are released?
The volume of the balloon if 0.25 moles of gas are released is 1.3L.
Solution:
[tex]\frac{1.75L}{3.50mol} = \frac{V_{2} }{2.6 moles}[/tex]
V₂ = 1.75 L * 2.6 moles/3.50 moles
= 1.3L
If the temperature and pressure are kept constant, the volume of the gas is directly proportional to the number of gas molecules. At constant temperature and volume, the pressure of a gas is directly proportional to the number of gas molecules present. As the balloon heats up, it expands and the air inside the balloon becomes less dense.
The volume and temperature kept changing so that the pressure remained constant. If the temperature is kept constant, the volume of a given amount of gas is inversely proportional to its pressure. Under the same conditions of temperature and pressure, the same volume of all gases contains the same number of molecules.
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what does the detector measure, and how are these numbers used to calculate transmittance and then absorbance?
The detector is used to measure the transmittance as well as the absorbance.
Through transmittance, the total light that passes through the sample is measured. Through absorbance, the total amount of light that can be observed by an object is measured.
The numbers that are generated on the spectrophotometer by the transmitter represent the total light given and that which is absorbed. By using these numbers we can measure the transmittance. The rate of transmittance as well as absorbance for each sample will be different.
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Technician a says that gasoline engines have spark plugs to ignite the air-fuel mixture. Technician b says that diesel engines use compression to ignite the air-fuel mixture. Who is correct?.
Answer:
Both technician a and b are correct that gasoline engines have spark plugs to ignite the air-fuel mixture. Technician b says that diesel engines use compression to ignite the air-fuel mixture.
Explanation:
Gasoline engines- Any of a group of internal combustion engines known as gasoline engines produce power by igniting a volatile liquid fuel (such as gasoline or a gasoline combination like ethanol) with an electric spark.
Diesel engines-The Rudolf Diesel-inspired diesel engine is a type of internal combustion engine known as a compression-ignition engine because it ignites fuel by heating the air in the cylinder as a result of mechanical compression (CI engine). This contrasts with engines that ignite the air-fuel mixture using spark plugs, such as gasoline or gas engines (using a gaseous fuel like natural gas or liquefied petroleum gas).
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What is the concentration in % (m/v) of a nacl solution prepared by dissolving 9. 3 g of nacl in sufficient water to give 350 ml of solution?.
350 ml of NaCl solution made by combining 9. 3 g of NaCl with enough water to dissolve it has a 0.458M molarity.
The solution is represented by molarity. M stands for "molarity," which is the amount of solute in moles per liter of solution.
The formula for calculating molarity is
M = moles of solute/liter of solution.
The mass of NaCl is 9.3 g, the volume of the solution is 350 mL, and the volume of the solution in liters is given by 350/1000, or 0.35 L.
M = moles of NaCl/liter of solution is the formula used to calculate M.... (1)
Therefore, we must first determine the moles of NaCl.
Molar mass (NaCl)/mass of NaCl = moles of NaCl...... (2)
NaCl's molar mass is 58 g/mol.
Add values to Eq (2)NaCl moles are 9.3 g/58 g/mol.NaCl moles equal 0.16 mol. Place the numbers in Eq. (1) as follows:
M = 0.16 mol/0.35 L
M = 0.458
The Molarity then equals 0.458M.
The molarity is 0.458M as a result.
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the beta decay of cesium-137 has a half-life of 30.0 years. how many years must pass to reduce a 26 mg sample of cesium 137 to 5.7 mg?
Answer:
10 pts you say?
Explanation:
subatomic particles are removed from glucose and end up creating water at the end of the electron transport chain?
The subatomic particles are removed from glucose and end up creating water at the end of the electron transport chain are two protons.
What is electron transport chain?
Electrons are transferred from one molecule to another in the electron transport chain and the energy released during these electron transfers is utilized to create an electrochemical gradient.
During the oxidative phosphorylation process, glucose molecules are stripped of their protons when two oxygen molecules are reduced to water using the electrons that have traveled through the electron transport chain. Once at the mitochondrial membrane, the protons are utilized to establish a proton gradient. By means of chemiosmosis, this gradient is utilized to propel the manufacturing of ATP.
Therefore the subatomic particles are removed from glucose and end up creating water at the end of the electron transport chain are two protons.
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What postulate of the kinetic molecular theory best explains why gases have high fluidity? because collisions between gas particles are elastic, there is no loss of energy as particles flow past each other. Because gases consist of large numbers of tiny particles, they spread out and do not come in contact with each other. Because the attractive forces between gas particles are negligible, gas particles can glide easily past one another. Because the average kinetic energy of gas particles increases as temperature increases, gas particles behave more like a liquid.
the elasticity of gas particle collisions, there is no energy loss when the particles pass one another. Gases are composed of a very large number of small particles, which spread out and avoid contact with one another.
Which of the following gas postulates from the kinetic molecular theory best explains why pressure exists in gases?As the quantity of gas particles in the container rises, so does the frequency of wall interactions and subsequently the pressure of the gas. The average kinetic energy of a gas particle is exclusively dependent on the temperature of the gas, says the theory's final postulate. As the volume of gas particles inside the container grows, more of them will collide with the walls, increasing the pressure and the frequency of collisions.
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Answer:
Because collisions between gas particles are elastic, there is no loss of energy as particles flow past each other.
what is the maximum number of electrons in an atom that can have these quantum numbers? n = 3, l = 2, ms = - 1/2
The most electrons that can have the quantum numbers n = 3, l = 2, and ms = -1/2 in an atom is 10.
Each electron in an atom is quantized using four quantum numbers:
The energy of the electron shell, which corresponds to the separation from the nucleus, is described by the principal quantum number (n). N must be an integer with a positive value.
The electron's orbital form is described by the angular momentum quantum number (l). L has an integer value that ranges from 0 to n-1.
The orbital's orientation with respect to the three axes of space is described by the magnetic quantum number (ml). An integer with the values -l to +l makes up the value for ml.
There are only two potential values for the spin quantum number (ms), which describes the electron's spin: +1/2 or -1/2.
The maximum number of electrons that can have the main quantum number of 3 and an angular momentum quantum number of 2 is what we are interested in learning in this inquiry. Since there are only two conceivable values for the spin quantum number, we know that a maximum of two electrons with opposite spins can occupy an orbital. The greatest number of electrons that can have the quantum numbers n=3 and l=2 can be calculated by counting the number of orbitals that can have a value of l=2 and multiplying that number by two.
The possible values for ml are -2, -1, 0, 1, and 2, since l=2 and we know from the information above that ml is an integer that ranges from -l to +l. This demonstrates that the total number of orbitals with the angular momentum quantum number l=2 is five. We obtain 52=10 by putting two electrons into each of these orbitals.
An electron with the quantum numbers n = 3 and l = 2 can have a maximum of 10 electrons.
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Molar Mass Values
NaN3
65.02 g/mol
Na
22.99 g/mol
N₂
28.02 g/mol
KNO,
101.11 g/mol
If 45.97 grams of sodium is produced in reaction 1, how many of grams of
nitrogen will be then be produced in reaction 2?
10 Na(s) + 2 KNO,(s) →K₂O(s) + 5 Na₂O(s) + N₂(g)
In consideration of Henry's law the molar mass of organic compound is 0.24 grams.
What is molar mass?The molar mass of a chemical compound defined as the mass of a sample of that compound devided by the amount of substance which is the number of moles in that sample,measured in moles.
Sol-One of three asks what the mass of water is in grams and two and 1/2 liters of paper of Equis, 12.5% sodium chloride, fifty five°C. This problem tells us that pure H2O is one hundred eighteen tour at fifty five*° C.So the first thing that we have to do here is figure out wth e um, the mole fraction of thermal fractions, I suppose, of both sodium chloride and water.
We know those 2.5 liters. We're looking for this number of moles here. Ideal gas constant 0.8 to 6 leader atmospheres over mole Calvin. And then we have to convert, um, Celsius, the 55 degrees C to Calvin. So we always rmember that simply 55 degrees Celsius plus two year and 73 which gets US 328 Calvin. So solving all of that for the number of moles, then that gives us 0.133 off water and 2.5 liters of vapor. So last step, then, is to just convert that to Graham's, since the problem asks for a mass and not by the number moles. So you can plug that, , basically into, uh, the molecular by it it and it does weight of water, just 18.2 grand's for mold. And that gives us keeping significant figures in mind. 0.24 grams.
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provide a reason to explain why the less stable radical intermediate leads to the formation of the major product in this reaction.
Hybridization, electronegativity, and polarizability are three variables that affect the stability of free radicals. The unpaired electron in these radicals, which tends to donate or acquire another electron to achieve stability, is the cause of their high reactivity.
Because the bromine radical is less reactive, it is more selective for the 2° radical. Cl is less picky and less selective due to its lower stability and increased reactivity.
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the half life of a radioactive substance is 1459 years. what is the annual decay rate? express the percent to 4 significant digits.
The relation between half-life and rate at which it is decaying is given by
t(1/2) = log2/rate
now in the above problem half-life is given as 1459 years substituting in the above equation we get the value of rate at which it is decaying to be rate=0.0001075.
The amount of substance that is present after t years given that the half-life of the substance is h is calculated through the equation,
A(t) = A(o)(0.5^t/h)
The 1/2-life of a radioactive isotope is the quantity of time it takes for one-1/2 of the radioactive isotope to decay. The half of-existence of a selected radioactive isotope is consistent; it's miles unaffected by using situations and is independent of the initial quantity of that isotope.
1/2-life (symbol t1⁄2) is the time required for an amount (of substance) to reduce to half of its initial price. The time period is commonly utilized in nuclear physics to explain how speedy volatile atoms undergo radioactive decay or how long strong atoms survive.
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What is the answer of number 11?
Hope this helps!
what is the molarity of a solution made by dissolving 45.6 g glucose, c6h12o6, in enough water to make 350.0 ml of solution?
The molarity of a solution made by dissolving 45.6 g glucose, C₆H₁₂O₆, in enough water to make 350.0 ml of solution is 0.722 M.
given that :
volume = 350 mL = 0.350 L
mass of glucose = 45.6 g
molar mass of glucose = 180.15 g/mol
the number of moles of glucose = mass / molar mass
= 45.6 / 180.15
= 0.253 mol
the molarity expression is given as follows :
Molarity = moles / volumes in L
= 0.253 / 0.350
= 0.722 M
Thus, the molarity of the solution to make 350.0 mL of solution is 0.722 M.
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what is the Ka reaction of hcn? Ka reaction: the Ka of hcn is 6.2×10−10. what is the Kb value for cn− at 25 °c? Kb
The Ka of the reaction of HCN is 1.6x10^-5 when the Ka of hcn is 6.2×10−10 and value of Kb is 1.6x10^-5
Ka reaction of HCN is
HCN (aq) + H2O (l) H3O+ (aq) + CN- (aq)
Now, at 250 C
Ka × Kb = Kw = 10-14
Hence Kb of CN- ion is
Or, Kb = = 1.6 × 10-5 .
Kb is the measure of the basic strength.It determines the relative basic strength.Kb is the base dissociation constantKb is the base dissociation constant. How thoroughly a base separates into its constituent ions in water is determined by the base dissociation constant.pKb is the negative base-10 logarithm of the base dissociation constant (Kb) of a solution. It is used to determine the strength of a base or alkaline solution.To learn more about base dissociation constant visit:
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are the physical and chemical properties of a compound necessarily similar to those of the elements of which it is composed?
Compounds have physical and chemical properties that are different from the properties elements of which it is composed.
A substance's physical property is a quality that can be seen or quantified without affecting the substance's identity. Color, density, hardness, and melting and boiling points are examples of physical qualities.
The capacity of a substance to go through a particular chemical transition is described by its chemical property. Rust is a different kind of matter than the iron, oxygen, and water present before the rust formed, hence its production is a chemical change. Chemical attributes include, for instance, flammability, toxicity, acidity, numerous types of reactivity, and heat of combustion.
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if you completely react 6 moles of h2 gas (with n2 as excess), how many moles of nh3 can be produced?
The number of moles of NH3 can be produced are 4 moles.
What is a mole?
The mole is the amount of substance in a system that includes the same number of elementary entities as there are atoms in 0.012 kilogram of carbon 12; it is denoted by the sign "mol."
What is a limiting factor?
Limiting factors are reactants or reagents that are used by a chemical reaction before other reactants. The limiting factor is the reactant or reagent with the lowest supply in terms of its required ratio in comparison to other reactants in the system.
According to the question;
Balanced equation would be :
[tex]3H_2 + N_2[/tex] ⇒ [tex]2NH_3[/tex]
Here, [tex]H_2[/tex] is a limiting factor
No. of moles of ammonia formed when 3 moles of [tex]H_2[/tex] react with excess of [tex]N_2[/tex] =2
applying unitary method:
No. of moles of ammonia formed when 6 moles of [tex]H_2[/tex] react with excess of [tex]N_2[/tex]= [tex]\frac{2}{3 } * 6[/tex] = 4moles.
The number of moles of NH3 can be produced are 4 moles.
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How does the strength of the imfs in water compare to the strength of the imfs in ethanol?.
Water has higher intermolecular force strength as compared to that of ethanol.
Water can form hydrogen bonds four ways as compared to ethanol that can form hydrogen bonds two ways. thus, water has strong bonds.
The interaction known as hydrogen bonding, which involves a hydrogen atom sandwiched between two other atoms with a high affinity for electrons, is stronger than van der Waals forces but weaker than ionic or covalent bonds. Atoms in separate molecules or distinct regions of the same molecule can form hydrogen bonds with one another. A hydrogen atom (FH, NH, or OH) is covalently bound to one of the pair's (the donor) typically fluorine, nitrogen, or oxygen atoms, with which it shares electrons unevenly. As a result of this high electron affinity, the hydrogen gains a little positive charge. The other atom in the pair, which is usually F, N, or O, has an unshared electron pair, giving it a little negative charge.
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also known asa toxic heavy metal , the lead in some paints is an example ofhazardous waste. why?
Except for combustible, oil-based paint, which contains lead, mercury, arsenic, et cadmium, it's likely your you color is just a garbage that needs special handling.
What is a metal, exactly?Metal is any of a group of substances with strong thermal and electrical conductivity, mutability, flexibility, and high light reflection.
How useful is metal?Metals are excellent building materials. Strength, hardness, and stiffness are just a few of the qualities metal metals possess. Metals may be heated and formed into anything, from a little paperclip to an enormous airplane. They are important for wires or cooking pans as they are efficient heat and electricity conductors.
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the model illustrates a process by which a substance is taken up by a cell. which statements describe the process? select the correct answer. (1 point)
The model shows the process of endocytosis.
What is endocytosis?
A biological process called endocytosis allows chemicals to enter the cell. An region of cell membrane that surrounds the substance to be swallowed then buds off inside the cell to create a vesicle containing the substance to be ingested. Pinocytosis (cell sipping) and phagocytosis are two types of endocytosis (cell eating). It is an active mode of transportation.Receptor-mediated endocytosis, sometimes referred to as clathrin-mediated endocytosis, caveolae, pinocytosis, and phagocytosis are the four subcategories of endocytosis mechanisms.Small molecules are transported through the phospholipid bilayer by the carrier and channel proteins explained in the section above. By use of a unique procedure known as endocytosis, eukaryotic cells may also take in macromolecules and particles from the surrounding media.Christian deDuve first used the word "endocytosis" in 1963.To know moremore about endocytosis, click the link given below:
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the ground-state valence-shell configuration of a particular atom is 4d105s25p1. the element to which this atom belongs is a
The atomic number of indium is 49, and its electronic configuration is [Kr] 4d105s25p1. This atom is a member of the element that belongs to groups 13 and 5. The luster of indium is bright silvery-white.
What is the electron configuration of valence shell in the ground state?The least energetic and most stable configuration is the ground state configuration. A higher energy configuration is called an excited state configuration (it requires energy input to create an excited state). The electrons used in bonds are valence electrons.
Valence electrons: What are they?The electrons in an atom's outermost shell, or energy level, are called valence electrons. oxygen has 6 valence electrons two in the 2s subshell and four in the 2p subshell. The electron configuration of oxygen can be expressed as 2s22p4.
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how many moles of magnesium oxide are produced by the reaction of 3.82 g of magnesium nitride with of water? mg3n2 3h2o → 2nh3 3mgo question 22 options: 0.114 0.0756 0.429 4.57 0.0378
The reaction will produce 6.61 mole of magnesium oxide.
What is the purpose of magnesium oxide?
There are several uses for magnesium oxide. Some people use it as an antacid to treat acid indigestion, digestive problems, and heartburn. Magnesium oxide can also be used as a laxative to quickly and temporarily empty the bowels (before surgery, for example).
Briefing:
This clearly demonstrates that 100.95g magnesium nitride reacts with 108.06g of water to give stoichiometric ammonia and magnesium oxide.
moles of Mg3N2 = 3.82g /100.95g per mole =0.0387 mole
mole of OH2 = 7.73g/18.01g per mole
magnesium oxide, i.e. 0.0387 mole × 58.32g per mole= 6.61mole
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A solution of potassium hydroxide (koh) is titrated against a solution of hydrochloric acid. How many moles of potassium hydroxide would react with 1 mole of hydrochloric acid?.
1 mole of potassium hydroxide would react with 1 mole of hydrochloric acid.
The balanced equation for the reaction is as follows:
[tex]KOH + HCl[/tex]→ [tex]KCl + H_{2} O[/tex]
Titration is defined as "the process of determining the quantity of a substance A by adding measured increments of substance B, the titrant, with which it reacts until exact chemical equivalence (the equivalence point) is achieved."
Titration is a common quantitative chemical analysis laboratory method for determining the concentration of an identified analyte. The titrant or titrator is a reagent that is prepared as a standard solution of known concentration and volume.
The titration's goal is to find the equivalence point, or the point at which chemically equivalent amounts of the reactants have been mixed. The amount of reactants mixed at the equivalence point is determined by the stoichiometry of the reaction.
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Compound B has molecular formula C6H10 and gives (CH3)2 CUCH2CH2CH3 when treated with excess H2 in the presence of Pd. B reacts with NaNH2 and CH3I to form compound C (molecular formula C7H2).
The compound B is 3,3-dimethyl-1-butyne, and the compound C is 4,4-dimethyl-2-pentyne.
Alkynes are hydrocarbons that have triple bonds between carbon atoms. CₙH₍₂ₙ₋₂₎ is the typical formula for molecules with one triple bond. Alkynes undergo many of the same reactions as alkenes, but because a triple bond contains two p-bonds, they can react twice.
Here, compound B with the molecular formula C₆H₁₀ is 3,3-dimethyl-1-butyne and compound C is 4,4-dimethyl-2-pentyne. The compound B reacts with sodium amide (NaNH₂) and methyl iodide (CH₃I), giving the compound C. This reaction explains the acidity of non-terminal alkynes.
In this reaction, sodium amide first abstracts the protons from carbon atoms near the triple bond. The resulting carbanions undergo rapid proton transfer equilibria to form a stable terminal alkyne conjugate base.
The reaction is attached.
The complete question is -
Identify the compounds B and C. Compound B has molecular formula C₆H₁₀ and gives (CH₃)₂CHCH₂CH₂CH₃ when treated with excess H₂ in the presence of Pd. B reacts with NaNH₂ and CH₃I to form compound C (molecular formula C₇H₁₂).
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An element from group 13 bonds with an element from group 17. Which formula correctly depicts the correct chemical formula for elements from these two groups?.
A chemical compound is created when metals and nonmetals mix in a specific ratio. AlCl3 is the compound that will be created from elements in groups 13 and 17.
A chemical compound is made up of several related molecules (or molecular entities), each of which has atoms from various chemical elements and is joined by chemical bonds. A molecule is not a compound because it is made up of only one element's atoms. A chemical reaction can convert one element into another and may involve interactions with other molecules. In the course of this process, atom-to-atom bonds may form or break.
Using the common chemical symbols with numerical subscripts, a chemical formula defines the number of atoms of each element in a compound molecule. The Chemical Abstracts Service has given a lot of chemical compounds a special CAS number that serves as an identification. More than 350,000 chemical compounds (including chemical combinations) have been registered for manufacturing and use globally.
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