Glycosides can be obtained from hemiacetal monosaccharides by reacting the hemiacetal group with an alcohol in the presence of an acid catalyst.
How to obtain glycosides?Hemiacetal monosaccharides can be converted to glycosides through a reaction with an alcohol and an acid catalyst, forming an acetal linkage between the anomeric carbon of the monosaccharide and the alcohol.
This reaction can be useful for the synthesis of glycosides and for the modification of carbohydrates in various applications. Glycosides are important compounds in many biological processes and can be found in various natural products, such as plant secondary metabolites and glycolipids.
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sodium benzoate (c6h5co2na) is used as a food preservative. calculate the ph and the concentrations of all species present
The food preservative sodium benzoate (C6H5CO2Na) is used. The pH of 0.040 M sodium benzoate should be calculated; the Ka value for benzoic acid (C6H5CO2H) is 6.5 x 10-5. The answer I came up with is pH = 8.39, which is the right one.
What impact does pH have on a food preserver?The pH of a food can affect the growth of bacteria, yeasts, and moulds. Microbial development will be inhibited by extremely low or extremely high pH levels. Practically, no unprocessed food has a pH level that is high enough to have significant preservation benefit.
Because it has its best antibacterial action within a pH range of 2.5 to 4.0, benzoic acid (BA) is a frequently used antimicrobial preservative in food and drinks, particularly carbonated ones.
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Ammonia reacts with oxygen to form nitric oxide and water vapor:4NH3 + 5O2 = 4NO + 6H2OWhen 20.0 g NH3 and 50.0 g O2 are allowed to react, which is the limiting reagent?A) NH3 B) O2 C) NO D) H2O E) No reagent is limiting.
O2 is the limiting reagent, and NH3 is in excess.
To determine the limiting reagent, we need to calculate the amount of product that can be formed from each reactant and compare them.
First, we need to convert the given masses of NH3 and O2 to moles using their respective molar masses:
20.0 g NH3 ÷ 17.03 g/mol NH3 = 1.17 mol NH3
50.0 g O2 ÷ 32.00 g/mol O2 = 1.56 mol O2
Next, we use the balanced chemical equation to determine the amount of product that can be formed from each reactant. We will use NH3 as an example:
1.17 mol NH3 × (4 mol NO ÷ 4 mol NH3) = 1.17 mol NO
1.17 mol NH3 × (6 mol H2O ÷ 4 mol NH3) = 1.75 mol H2O
Now we do the same calculation for O2:
1.56 mol O2 × (4 mol NO ÷ 5 mol O2) = 1.25 mol NO
1.56 mol O2 × (6 mol H2O ÷ 5 mol O2) = 1.87 mol H2O
From the calculations, we can see that NH3 can produce 1.17 mol NO and 1.75 mol H2O, while O2 can produce only 1.25 mol NO and 1.87 mol H2O.
The correct answer is B) O2.
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What is the term for a framework of wood or metal installed to prevent caving of trench walls?
a) Trench Box
b) Sloping
c) Haunching
d) Shoring
Answer:
Explanation:
Shoring (Shoring system) means a structure such as a metal hydraulic, mechanical or timber shoring system that supports the sides of an excavation and which is designed to prevent cave-ins.
2. Appropriate units for a second-order rate constant are
A) M/s
B) 1/Mls
C) 1/s
D) 1/M2ls
The rate constant of a second order reaction is M⁻¹Ls⁻1 or 1/Mls .option (b) is correct.
Rate constant in a chemical reaction is defines the the relationship between the molar concentration of the reactants and the rate of the chemical reaction. It is symbolized as K.
Rate constant is dependent upon the temperature. For a zero-order reaction, rate constant's unit is molL⁻1s⁻1 . For a first-order reaction, rate constant's unit is s⁻1, for a second-order reaction, rate constant's unit is mol⁻¹Ls⁻¹.
Thus, option (b) is correct
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What is the mass of 0.55 mole of C6H6?A) 78.11 g B) 78.11 amu C) 42.96 g D) 42.96 amu E) 7.04 x 10-3 gAns: D Category: Easy Section: 3.3
D) 42.96 amu.
To find the mass of 0.55 mole of C6H6 (benzene), we need to use the molar mass of benzene, which is the sum of the atomic masses of all its constituent atoms.
The molecular formula of benzene is C6H6, which means it has 6 carbon atoms and 6 hydrogen atoms. The atomic masses of carbon and hydrogen are 12.01 amu and 1.01 amu, respectively.
So, the molar mass of benzene = (6 × 12.01 amu) + (6 × 1.01 amu) = 78.11 amu
Now, we can use the formula:
mass = moles × molar mass
Substituting the given values:
mass = 0.55 mol × 78.11 amu/mol
mass = 42.96 amu
Therefore, the mass of 0.55 mole of C6H6 is 42.96 amu.
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Calculating Heat from Thermochemical Equations 100 points
The balanced thermochemical equation for the combustion of methane gas is: (Picture Below)
Calculate much heat is released when 4.5 moles of methane gas undergo a combustion reaction.
The heat energy released when 4.5 moles of methane gas undergo a combustion reaction is -4005 KJ
How do i determine the heat energy released?The heat energy released when 4.5 moles of methane gas undergo a combustion reaction can be obtain as follow:
CH₄ + 2O₂ -> CO₂ + 2H₂O ΔH = -890 KJ/mol
From the balanced equation above,
When 1 moles of methane gas, CH₄ reacted, -890 KJ of heat energy were released.
Therefore,
When 4.5 moles of methane gas, CH₄ react = (4.5 mole × -890 KJ) / 1 mole = -4005 KJ of heat energy will be release.
Thus, the heat energy released is -4005 KJ
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in which change does oxidation occur? a. ch3 cho → ch3 ch2oh b. cro42-→ cr2o72- c. so42-→ so3 2- d. no2- → no3 -
In the given options, oxidation occurs in option D: NO2- → NO3-. In this change, the nitrogen atom increases its oxidation state from +3 in NO2- to +5 in NO3-, which indicates an oxidation process.
The chemical processes in which electrons are transferred from one chemical to another. Redox reactions, also known as oxidation-reduction reactions, are the name given to these electron-transfer processes. Energy changes in the form of heat, light, electricity, etc. accompany these reactions. The addition of oxygen or hydrogen to various substances is another step in the oxidation and reduction reactions.
In the given options, oxidation occurs in option D: NO2- → NO3-. In this change, the nitrogen atom increases its oxidation state from +3 in NO2- to +5 in NO3-, which indicates an oxidation process.
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"In which change does oxidation occur?"
The correct answer is option D: NO2- → NO3-.
In this change, the nitrogen atom in the nitrite ion (NO2-) is oxidized to form the nitrate ion (NO3-). Here's a step-by-step explanation:
1. Identify the oxidation states of nitrogen in both ions.
In NO2-, the nitrogen atom has an oxidation state of +3.
In NO3-, the nitrogen atom has an oxidation state of +5.
2. Compare the oxidation states.
The oxidation state of nitrogen increases from +3 in NO2- to +5 in NO3-.
3. Determine if oxidation occurred.
Since the oxidation state increased, oxidation occurred in this change.
So, the change in which oxidation occurs is NO2- → NO3-.
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From the following list, select all the reducing agents that are commonly used in organic reactions.A. NaNH2B. CrO3 in acidC. H2 with a metal catalystD. NaBH4E. Na in NH3 (l)
D. NaBH4 is a reducing agent commonly used in organic reactions. It reduces carbonyl groups (such as aldehydes and ketones) to alcohols. None of the other options listed include a reducing agent commonly used in organic reactions.
A. NaNH2 is a strong base that can be used in organic reactions as a nucleophile, but it is not a reducing agent.
B. CrO3 in acid is not a reducing agent, but an oxidizing agent commonly used to oxidize alcohols to carbonyl compounds.
C. H2 with a metal catalyst (such as Pd/C or Pt) is used in hydrogenation reactions to reduce alkenes and alkynes to alkanes, but it is not considered a reducing agent.
E. Na in NH3 (l) is used as a strong reducing agent in inorganic chemistry, but it is not commonly used in organic reactions.
Based on the given list, the reducing agents commonly used in organic reactions are: A. NaNH2 (sodium amide)
C. H2 with a metal catalyst (hydrogen gas and a metal catalyst)
D. NaBH4 (sodium borohydride)
E. Na in NH3 (l) (sodium in liquid ammonia)
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directories and portals, web site evaluators, forums, fan clubs, and user groups are all forms of which of the following?
Online communities are designed to allow users to interact with each other, share information, and collaborate on projects.
What is projects ?Projects are complex tasks or activities that require planning, research, organization, and implementation. Projects are typically created to achieve a goal and are typically associated with a timeline, budget, and resources. Projects can be short-term, such as a science fair project, or long-term, such as a renovation project. Projects can also be small, such as a fundraising event, or large, such as a new building. Depending on the project, tasks may need to be delegated to different people or departments, and progress must be tracked in order to ensure completion.
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Question 12
Of the following, which is not ordinarily used as a rodenticide?
a. ANTU
b. methoxychlor
c. sodium fluoracetate
d. warfarin
Of the four options listed, the one that is not ordinarily used as a rodenticide is methoxychlor. The correct answer is option b.
Methoxychlor is an insecticide that was widely used in the past to control a range of pests, including mosquitoes, flies, and other insects. However, it is not effective as a rodenticide and is not commonly used for this purpose.
The other three options listed are all commonly used as rodenticides. ANTU (alpha-naphthylthiourea) is a chemical compound that is toxic to rodents and is often used in bait formulations to control populations of rats and mice.
Sodium fluoracetate, also known as compound 1080, is a highly toxic substance that is commonly used as a rodenticide and is effective against a range of rodent species. Warfarin is another widely used rodenticide that works by disrupting the blood clotting process in rodents, ultimately causing fatal hemorrhaging.
Therefore, option b is correct.
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Question 27
Decontamination solvents must be
a. disposed of properly
b. reused continuously until the site clean-up is complete
c. inspected by OSHA personnel
d. inspected by EPA personnel
Decontamination solvents must be inspected by OSHA personnel. option (d) is correct.
Decontamination of solvents can be described as any method used to remove contaminants from a solvent .There are different methods for this process. Decontamination plan should be made prior to practicing anything. Both, physical and chemical decontamination methods can be used for decontamination. Firstly, physical procedures should be used and then the chemical methods.
The safety responsibilities of OSHA includes providing a workplace free from hazards and comply with rules and regulations, standards issued under the OSH Act.
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Question 71
A chlorine concentration of 30 ppm in a drinking water supply is:
a. Excessive
b. Just right
c. Too low
d. Would not kill Ecoli
A chlorine concentration of 30 ppm in a drinking water supply is the correct option a. Excessive.
A chlorine concentration of 30 ppm in a drinking water supply is excessive. The recommended range for disinfecting drinking water is between 0.2-5 ppm, and a concentration of 30 ppm can cause health concerns for those who consume it. While it would effectively kill Ecoli, it is not a safe or appropriate concentration for drinking water.
A drinking water source should not include more than 30 ppm of chlorine. A concentration of 30 ppm can be harmful to human health and is outside the acceptable range for disinfecting drinking water, which is between 0.2 and 5 ppm. While it will kill Ecoli, the concentration is not suitable or safe for drinking water.
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[Post lab Q]: How many stereocenters are there in isoborneol? How many are there in camphor?
The number of stereocenters in isoborneol compound and camphor compound are two and three in counts.
Nuclear Magnetic Resonance (NMR) spectroscopy is a widely used technique in analytical chemistry to determine the purity of samples and to predict the structure of organic compounds. The H NMR spectroscopy provides the information about how many types of hydrogen atoms are present in the atom of a molecule. Stereocenters : An atom surrounded by four different groups is known as a chiral center or stereocenter.
Isoborneol is a chemical compound with formula, C₁₀H₁₈O, the number of Stereocenters in this compound are 2 in count. Similarly camphor is a chemical compound with formula, C₁₀H₁₆O, the number of Stereocenters in this compound are 3 in count.
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The patient in room 2 is afebrile. What is most likely their temperature?
The patient in room 8 is febrile. What is most likely their temperature?
a non-expandable container, with a volume of 1500 ml, is filled with a mixture of gases at 30 oc. the partial pressure of the helium gas, he(g), in the container is 510 torr. the partial pressure of the medical gas, x2(g), in the container is 291 torr. the partial pressure of elizium gas, o2(g), in the container is 0.539 atm. what is the total pressure the gases exert on the container?
The total pressure exerted by the gases on the container is 1.593 atm when a non-expandable container, with a volume of 1500 ml, is filled with a mixture of gases at 30°C.
To find the total pressure exerted by the gases in the container, you need to add up the partial pressures of each gas. The given partial pressures are in different units, so you need to convert them to a common unit before adding them. Let's use atmospheres (atm) as the common unit.
1. Convert the partial pressure of helium gas (He) from torr to atm:
1 atm = 760 torr
510 torr × (1 atm / 760 torr) = 0.671 atm
2. Convert the partial pressure of medical gas ([tex]X_2[/tex]) from torr to atm:
291 torr × (1 atm / 760 torr) = 0.383 atm
3. The partial pressure of elizium gas ([tex]O_2[/tex]) is already given in atm: 0.539 atm
4. Add the partial pressures of all three gases to find the total pressure:
Total pressure = P(He) + P([tex]X_2[/tex]) + P([tex]O_2[/tex])
Total pressure = 0.671 atm + 0.383 atm + 0.539 atm
Total pressure = 1.593 atm
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in the following reaction, how many molecules of bh3 are required to react with 6 molecules of 2-methyl-2-butene? ch9 d2 q5.pdf
The number of molecules of BH₃ is 2 to react with 6 molecules of 2-methyl-2-butene.
The smallest recognisable unit into which a pure material may be split while retaining its composition and chemical characteristics is a molecule, which is a collection of two or more atoms.
Until portions consisting of single molecules are reached, the division of a sample of a substance into progressively smaller parts does not result in a change in either its composition or its chemical characteristics. Still smaller parts of the substance are produced by further subdivision, and these parts are always different chemically and typically have different compositions from the original substance. The chemical links that hold the atoms in the molecule together are severed at this final step of fragmentation.
Atoms are made up of a single positively charged nucleus that is surrounded by a cloud of negatively charged electrons. Atoms interact with one another and with their nuclei when they are near to one another. The atoms join together to form molecules if this contact lowers the system's overall energy level.
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Convert 125% to a fraction in lowest terms. *
O 11/2
0 11/3
O 11/4
O 12/5
5/4 is the fraction value for 125%. A fraction consists of two components. The numerator is the figure at the highest point of the queue.
The components of a whole and group of items are represented by fractions. A fraction consists of two components. The numerator is the figure at the highest point of the queue. It details the number of equal portions that were taken from the total or collection. The denominator is the figure that appears below the line. It displays the total amount of identical objects within a collection or the total amount of equal sections that the collection is divided into.
125%= 125/100=5/4
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(a) What is always the maximum temperature needed for steam distillation?
The maximum temperature needed for steam distillation is always 100 degrees Celsius, which is the boiling point of water.
What is Steam Distillation?
The maximum temperature needed for steam distillation is always 100 degrees Celsius (212 degrees Fahrenheit). Steam distillation is a process where a mixture of two immiscible liquids, typically water and an organic compound, is heated to produce steam. The steam carries the volatile components of the organic compound, and they are then condensed and collected. The maximum temperature of 100 degrees Celsius corresponds to the boiling point of water, which is the most commonly used liquid in steam distillation. This temperature is required to generate steam, which is used to extract essential oils or other volatile compounds from plant materials. However, it is important to regulate the temperature carefully to avoid overheating and damaging the compounds being extracted.
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there are some data that suggest that zinc lozenges can significantly shorten the duration of a cold. if the solubility of zinc acetate, zn(ch3coo)2 , is 43.0 g/l , what is the solubility product ksp of this compound? express your answer numerically.
The solubility product, ksp = 2.58 x 10^-2 mol^3/L^3.
What do you understand by solubility product?Solubility product refers to the equilibrium constant for the dissolution of a sparingly soluble compound in water. In other words, it is a measure of the extent to which a solid compound will dissolve in water.
The solubility product constant (Ksp) for zinc acetate, Zn(CH₃COO)₂, is given by the following equation:
Zn(CH₃COO)₂ ⇌ Zn²⁺ + 2CH₃COO⁻
The Ksp expression for this reaction is:
Ksp = [ Zn²⁺][CH₃COO⁻]^2
To determine the Ksp of zinc acetate, we need to know the concentration of Zn²⁺and CH₃COO⁻ ions in a saturated solution. Since the solubility of zinc acetate is 43.0 g/L, we can assume that a saturated solution contains 43.0 g of zinc acetate per liter of water.
The molar mass of zinc acetate is:
MZn(CH₃COO)₂ = (1 x 65.38 g/mol Zn) + (2 x 12.01 g/mol C) + (6 x 1.01 g/mol H) + (4 x 16.00 g/mol O)
= 183.48 g/mol
The number of moles of zinc acetate in a liter of saturated solution is:
moles(Zn(CH₃COO)₂) = 43.0 g / 183.48 g/mol = 0.2344 mol/L
Since zinc acetate dissociates into one Zn²⁺ ion and two CH₃COO⁻ ions, the concentration of Zn²⁺ ions in the saturated solution is:
[ Zn²⁺] = 0.2344 mol/L
The concentration of CH₃COO⁻ ions is twice the concentration of Zn²⁺ ions:
[CH3COO-] = 2 x [ Zn²⁺] = 2 x 0.2344 mol/L = 0.4688 mol/L
Therefore, the Ksp of zinc acetate is:
Ksp = [ Zn²⁺][CH₃COO⁻]^2
= (0.2344 mol/L)(0.4688 mol/L)^2
= 0.0258 mol^3/L^3
Expressing this answer in scientific notation, we get:
Ksp = 2.58 x 10^-2 mol^3/L^3
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ΔS is positive for the reaction __________. a. CaO(s) + CO2(g) -> CaCO3(s) b. N2(g) + 3H2(g) ->2NH3(g) c. 2SO3(g) -> 2SO2(g)+ O2(g) d. Ag+(aq) + Cl-(aq)-> AgCl(s) e. H2O(l) ->H2O(s)
ΔS is positive for the reaction b. N2(g) + 3H2(g) ->2NH3(g) since there is an increase in the number of moles of gas from reactants to products.
which results in a positive ΔS. The other reactions either have no change or a decrease in the number of moles of gas, resulting in a negative ΔS. Additionally, the production of CO2 in option a. and the conversion of liquid water to solid water in option e. do not directly affect the entropy of the system.
The formation of solid AgCl in option d. could result in a slight decrease in entropy due to the decreased mobility of the ions in the solid state. The decomposition of SO3 in option c. could result in a decrease in entropy due to the formation of fewer molecules from more molecules.
ΔS is positive for the reaction c. 2SO3(g) -> 2SO2(g) + O2(g). A positive ΔS indicates an increase in disorder or entropy, which occurs in this reaction as more gaseous molecules are produced from fewer reactant molecules.
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ΔS is positive for the reaction __________.
ΔS is the change in entropy, which measures the randomness or disorder of a system. A positive ΔS value indicates an increase in disorder.
a. CaO(s) + CO2(g) -> CaCO3(s)
b. N2(g) + 3H2(g) -> 2NH3(g)
c. 2SO3(g) -> 2SO2(g) + O2(g)
d. Ag+(aq) + Cl-(aq) -> AgCl(s)
e. H2O(l) -> H2O(s)
Out of the given reactions, ΔS is positive for the reaction:
c. 2SO3(g) -> 2SO2(g) + O2(g)
In this reaction, the total number of gas molecules increases from 2 to 3, resulting in an increase in randomness and disorder, leading to a positive ΔS value.
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In any galvanic cell the electrons flow from the _____ (anode/cathode) through the external circuit to the ____ (anode/cathode)
In any galvanic cell, the electrons flow from the anode to the cathode through the external circuit. In a galvanic cell, also known as a voltaic cell, electrochemical reactions occur at two electrodes, the anode and the cathode.
The anode is the electrode where oxidation occurs, and it is the source of electrons in the cell. Electrons are released from the anode and flow through the external circuit towards the cathode. The cathode is the electrode where reduction occurs, and it is the site where electrons are gained in the cell. Electrons are accepted by the cathode, where reduction reactions take place. These reactions involve the transfer of electrons between the electrodes through an external circuit, which creates an electric current.
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Question 65
The highest home radon concentration levels are most likely to be found in:
a. Upstairs halls
b. Dining areas
c. Basements
d. Near windows
The highest home radon concentration levels are most likely to be found in: c. Basements
Radon is a radioactive gas that comes from the natural decay of uranium in soil, rock, and water. It typically moves up through the ground and into homes through cracks and other holes in the foundation. Basements are closest to the ground and have more direct contact with the soil, which leads to higher radon concentration levels compared to other areas of the home.Radon gas enters homes through the foundation and accumulates in damp, low-lying areas such as basements, crawl spaces, and other areas with poor ventilation. Upstairs halls, dining areas, and near windows are not typically areas where radon gas concentrations are high.
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2. Assume that a class named Numbers has the following static member function declaration: static void showTotal(); Write a statement that calls the showTotal function.
The statement can be called using scope resolution operator.
Assuming that the showTotal() function is defined inside the Numbers class, the statement to call the function would be:
Numbers::showTotal();
The :: is the scope resolution operator, which is used to specify the namespace or scope of a function or variable. In this case, it specifies that the showTotal() function is a static member of the Numbers class. The function can be called without creating an instance of the class because it is declared as static.
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Why re-crystallization was carried out
Re-crystallization is carried out to purify solid compounds by dissolving and re-crystallizing them to remove impurities and obtain a higher-purity product.
Re-crystallization is a typical method in chemistry for removing impurities from solid substances. A solid substance is dissolved in a solvent at high temperatures, and then the solution is gradually cooled to allow the substance to re-crystallize. A higher quality product is produced as a result of this procedure, which frequently results in the exclusion of contaminants that were present in the original solid from the new crystals.
The removal of impurities from organic compounds, which frequently have a broad range of boiling points and can be challenging to purify using conventional techniques, is made possible via re-crystallization.
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word equation solid siliver chloride (AgCI) and an aqueous solition of nitric acid (HNO3) are produced when a solution of silver nitrate (AgNO3) is reacted with a solution of hydrochloric acid (HCI)
The word equation for the reaction between silver nitrate (AgNO3) and hydrochloric acid (HCl) to produce solid silver chloride (AgCl) and an aqueous solution of nitric acid (HNO3) is:
AgNO3(aq) + HCl(aq) → AgCl(s) + HNO3(aq)
In this reaction, the silver ion (Ag+) from the silver nitrate solution (AgNO3) combines with the chloride ion (Cl-) from the hydrochloric acid solution (HCl) to form solid silver chloride (AgCl), which precipitates out of the solution. The nitrate ion (NO3-) from the silver nitrate solution combines with the hydrogen ion (H+) from the hydrochloric acid solution to form nitric acid (HNO3), which remains in solution.
__________ is required to break covalent bonds between atoms.
(double/triple, coordinate covalent bond, energy, bond dissociation energy, resonance structure)
Bond dissociation energy is required to break covalent bonds between atoms. Bond dissociation energy (BDE) is the energy required to break a covalent bond between two atoms in a molecule.
Here are some additional points about bond dissociation energy:
BDE varies depending on the identity of the atoms involved in the bond and the bonding environment.BDE values can be calculated using computational methods, such as density functional theory.The bond dissociation energy of a molecule can influence its reactivity and stability.Chemical reactions can involve the breaking and forming of bonds with different BDEs, which can affect the overall energy change of the reaction.This energy is necessary to overcome the attractive forces between the positively charged nuclei and negatively charged electrons. BDE is typically measured in units of kilojoules per mole (kJ/mol).
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What chlorine concentration should be produced when disinfecting a well or well pump?
a.) 25 mg/L
b.) 50 mg/L
c.) 75 mg/L
d.) 100 mg/L
The recommended chlorine concentration for disinfecting a well or well pump is 50 mg/L.
When disinfecting a well or well pump, a chlorine concentration of 50 mg/L (option b) is typically recommended to ensure effective disinfection and removal of contaminants.
A highly reactive material is chlorine. There is no disinfection at this point when it is introduced to a well; instead, it initially interacts with inorganic substances (hydrogen sulphide, ferrous iron, and manganese). Afterwards, the leftover chlorine reacts with organic matter (algae, phenols, and slime growth) as a result of the reduction of these chemicals. While some unpleasant flavours and aromas might be eradicated, there is only a weak disinfectant activity, and trihalomethanes (carcinogenic, chlorinated organics) might be created.
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2,2-demethyl-1-bromopropane, a primary alkyl halide, reacts 100,000 times slower than ethyl bromide in an SN2 reaction. Why?
2,2-dimethyl-1-bromopropane, a primary alkyl halide, reacts 100,000 times slower than ethyl bromide in an SN2 reaction because the former compound even though a primary alkyl halide has more stearic hindrance than the latter.
In SN2 reaction refers to a nucleophilic substitution reaction in which new bonds are formed and old bond gets broken simultaneously. It is a bimolecular reaction.
The reactivity of an alkyl halide SN2 reaction is as per the following pattern -methyl > 1° halide > 2° halide > 3° halide. This rule is due to an increase in stearic hindrance.
The reactivity of an alkyl halide SN2 reaction is as per the following pattern RF > RCl > RBr > RI. This rule is due to more electronegativity and hence easy addition of the halide ion.
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Question 1
Which hazard is related to size reduction method for solid waste?
a. toxic gases
b. rodent problems
c. insect infestations
d. explosions
The hazard related to size reduction methods for solid waste is explosions. Size reduction methods involve crushing, shredding, or grinding the solid waste materials to reduce their size, which can lead to the generation of heat and the release of flammable gases.
If the generated heat and gases are not properly managed, they can accumulate and ignite, causing an explosion. Therefore, it is important to implement safety measures such as proper ventilation, monitoring, and maintenance of equipment to prevent explosions and ensure worker safety. Additionally, training workers on the proper handling and disposal of solid waste can also minimize the risk of explosions and other hazards.
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Which type of pressure sensor uses a wire fastened to a diaphragm?
a.) Bellows sensor
b.) Strain gauge
c.) Helical sensor
d.) Diaphragm element
Strain gauge is the type of pressure sensor uses a wire fastened to a diaphragm. Hence, option B is correct.
Naturally, resistive pressure sensors utilize the change produced in electrical resistance of a strain gauge that is bonded to the diaphragm that's exposed to the pressure medium.
Resistive or piezoresistive effect is the effect that is defined as the resistive pressure measurement sensors utilize the change in electrical resistance of a strain gauge bonded to the diaphragm (which is also known as a flexure element) which is exposed to the pressure medium.
Generally a diaphragm pressure transducer is defined as a mechanical device which is used in the conversion of pressure changes into an electric signal, that is generally measured to gauge changes in pressure. Hence, option B is correct.
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