They collect on the pinnacle of the tube in which the oxygen awareness is highest. 2: Obligate anaerobes are poisoned through oxygen, so that they collect at the lowest of the tube in which the oxygen awareness is lowest.
Different techniques are possible: anaerobic cultures may be grown in an anaerobe jar or in a discounted broth which include Brain Heart Infusion. We delivered a compound known as thioglycollate to our medium. Obligate anaerobes generally stay in oxygen-loose places, which includes withinside the intestine of an animal or withinside the mud. These touchy organisms can most effective tolerate oxygen concentrations of <0.5% to 8%.
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based on this figure, how does the amount of water evaporating from the ocean compare to the amount of precipitation falling into the ocean?
The amount of water evaporating from the ocean is significantly larger than the amount of precipitation falling into the ocean. On a global scale, the ocean loses about 577,000 cubic kilometers of water through evaporation each year, whereas it gains just 505,000 cubic kilometers of water from precipitation.
The Hydrologic Cycle and its Impact on the OceanIs a natural process involving evaporation, precipitation, transport, and recirculation of water through the land and ocean. The key elements in the hydrologic cycle are water and heat.
The hydrological cycle is important for life on Earth, as it regulates air moisture levels and contributes to:
Food productionEnergy productionAquifer rechargeFlood mitigationThe hydrological cycle also has a significant impact on the ocean, regulating:
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In the bromination reaction of your chalcone, you form a racemic mixture.a. Draw the structure of the enantiomers you form and assign R, and S to each of thestereocenters.b. Will you see 2 spots on a TLC of your reaction products? Why or why not?
(B) No, enantiomers can not be separated over TLC, hence, they will appear at same Rf value. This is because both have similar electronic environment and bind to silica with same extent.Enantiomers are pairs of compounds with exactly the same connectivity but opposite three-dimensional shapes.
Enantiomers are not the same as each other; one enantiomer cannot be superimposed on the other. Enantiomers are mirror images of each other.Any reaction or process in which bromine (and no other elements) are introduced into a molecule. Bromination of an alkene by electrophilic addition of Br2. Bromination of a benzene ring by electrophilic aromatic substitution.The mechanism of reaction between ethene and bromine is an electrophilic addition reaction. During the reaction, one of the bromine atoms receives a partial positive charge. That bromine atom attacks the double bond in ethene, forming a cyclic structure, giving the attached bromine a positive charge.
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This is a chemical produced by cells in the body, which circulates throughout the body in the bloodstream: __________. It affects a wide range of functions and acts on one or more target _________.A. hormone/tissuesB. chondrocyte/organ systemsC. hormone/mitochondriaD. chondrocyte/mitochondriaE. amino acid/chloroplastsF. lipid/membranesG. hormone/membranes
This is a chemical produced by cells in the body, which circulates throughout the body in the bloodstream is Hormone. It affects a wide range of functions and acts on one or more target as tissues.
So, correct answer is Option A Hormone/Tissue
The chemical messengers of the body, hormones communicate with tissues and the bloodstream. Hormones affect a variety of bodily functions, including growth and development, metabolism—the process through which your body converts food into energy—sexual function, reproduction, and mood.
Tissue is colection of huge amount of cells. Connective tissue, epithelial tissue, muscular tissue, and nerve tissue are the four fundamental forms of tissue. Other tissues are held together and supported by connective tissue (bone, blood, and lymph tissues). A coating is provided by epithelial tissue (skin, the linings of the various passages inside the body).
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Complete, balance and write the net ionic equation for the following reaction: CH3COOH(aq) + NaOH(aq)
The net ionic equation for CH3COOH(aq) + NaOH(aq) reaction is; CH3COOH(aq)+OH⁻(aq)→CH3COO⁻(aq)+H2O(l)
The acetic acid will react with sodium hydroxide to give sodium acetate and water. The molecular equation is shown below.
CH3COOH(aq)+NaOH(aq)→CH3OONa(aq)+H2O(l)
The above molecular equation is already balanced as there are the same numbers of elements on both sides. This reaction is an acid base reaction as an acid and a base react to form salt and water.
Both acetic acid and sodium hydroxide will exist in the form of their constituent ions because they are soluble in aqueous solution.
By breaking all the strong electrolytes in to their constituent ions, we get the complete ionic equation as follows:
CH3COOH(aq)+Na^+(aq)+OH⁻(aq)→CH3COO⁻(aq)+Na^+(aq)+H2O(l)
By removing the spectator ions we can get the net ionic equation.
In the complete ionic equation, Na+ ion is the spectator ion as it is present on both the sides of the equation. So by removing it we can get the net ionic reaction.
The net ionic equation is shown as follows:
CH3COOH(aq)+OH⁻(aq)→CH3COO⁻(aq)+H2O(l)
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when two hydrogen atoms pair together, they form a bond to achieve a complete , which is a stable configuration.
By sharing electrons and forming a covalent connection, two hydrogen atoms can reach a stable electron configuration.
What does place when two hydrogen atoms combine to produce the H2 molecule?A covalent bond is the name given to this kind of chemical interaction. When two atoms share one or more pairs of electrons, the link is referred to as covalent. When two hydrogen atoms combine to form a hydrogen molecule, their individual single electrons are shared (H2).
The reaction between H2 and O2 is what kind of reaction?H2 is oxidizing to H+ ions because oxidation involves the loss of electrons, while O2 is reducing to O- - ions because reduction involves the gain of electrons. Since both oxidation and reduction are occurring at the same time.
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Why does this equation show that matter is neither created nor destroyed (law of
conservation) in a chemical reaction?
Mg(OH), + 2HN03 - Mg(NO3), + 2H,O
There are the same number of atoms for each element on the reactant and product
side of the equation.
There are the same number of molecules on the reactant and product side of the
equation.
There are the same number of reactants as products in the equation.
® This equation does not show that matter is neither created nor destroyed.
Since matter cannot be generated or destroyed, according to the rule of preservation of matter, you must retain the same number and type of atoms after a chemical reaction as we did before.
What principle states that matter cannot be generated or destroyed?According to the rule of conservation of mass, mass is neither generated nor destroyed during a chemical process.For instance, when coal is burned, every carbon atom in it transforms into carbon dioxide.
Why cannot matter be made or destroyed?According to the rule of conservation of mass, there is no net change in the reactants' and products' masses before or after a chemical reaction.Thus, the total mass of a chemical process remains constant since mass cannot be generated or removed.
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classify each of the following as a property of acids or bases. drag each item to the appropriate bin.
Answer:
Acids- Taste sour, turn litmus paper red, dissolve many metals
Bases- Taste bitter, turn litmus paper blue, feel slippery
Explanation:
Property of Acids:
Taste sourTurn litmus paper redDissolve many metalsProperty of Bases:
Taste bitterFeel slipperyTurn litmus paper blueWhat are Acids and Bases?Chemical substances with different characteristics include bases and acids. When a substance is dissolved in water, an acid or base will produce hydrogen ions (H+), while a base will produce hydroxide ions (OH-). Acids are often sour in taste, corrode metals and turn litmus paper red.
In contrast, bases often taste bitter, feel greasy or soapy to the touch, and turn litmus paper blue. The acidity or basicity of a solution is determined using the pH scale, in which a pH of 7 indicates neutrality, a pH value less than 7 indicates acidity, and a pH value above 7 indicates basicity.
Therefore, property of Acids:
Taste sourTurn litmus paper redDissolve many metalsProperty of Bases:
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solely by comparing the webmo nmr chemical shifts and integration values to an experimental nmr spectrum of your product, which of the 6 benzaldehydes could be uniquely identified
carbon is saturated, it produces a saturated aldehyde, and when the alpha carbon is aromatic, the resulting functional group is known as an aromatic aldehyde. The aldehydic hydrogen in aldehydes is distinctive in that it is isolated at the end of a molecule, on the opposite side of the carbonyl group.
Comparing physical properties, performing functional group tests, and comparing the melting points of derivatives to those of known compounds described in the literature can all be used to identify the structures of unidentified compounds. These qualitative tests reveal solubility characteristics and chemical reactivity.
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what do helium, neon, and argon have in common; what do lithium, sodium and potassium have in common; are noble gases reactive; how many valence electrons do noble gases have; what can you conclude about the ability of noble gases to undergo ionization?; what is the ground state electron configuration for the element sn?; which best describes the properties of representative elements?; why are noble gases stable
Helium , neon and argon are all called noble gases. Lithium, sodium and potassium are all called Alkali metals. Noble gases are stable because that have full valence shells electrons.
The common in Helium, neon, and argon are all noble gases located in the last group that is 18th group of the periodic table. As alkali metals, lithium, sodium and potassium easily react with water to produce hydrogen and metal hydroxides which are alkaline in nature. They have only one valence electron in their outermost shells, which makes them extremely unstable and reactive. All the noble gases elements have 8 valence electrons in their highest principle energy level.
Noble gases has the outermost eight electrons required for any specie to attain stability. This is why the first ionization energy of noble gases is usually far higher than that of elements from other groups. The total electron configuration would be 1s2 2s2 2P6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p2 . The full valence electron shells of these atoms make noble gases extremely stable and unlikely to form chemical bonds because they have little tendency to gain or lose electrons. That's why noble gases are stable.
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When Q < K, the reaction will proceed so that the concentrations of the _________ decrease and the concentrations of the ________ increase.
If Q > K, the reaction will continue with the reactant concentrations falling and the product concentrations rising.
A change in the arrangement of the atoms or molecules of two or more substances when they come into contact, producing the creation of one or more new substances. The interaction of electrons from one substance with those of another is reactions.
When atoms' chemical bonds are established or ruptured, chemical processes take place. The materials that initiate a chemical reaction are known as reactants, while the materials created as a result of the reaction are known as products. A chemical reaction. is. a process in which. reactants interact chemically. and turn into. products. For illustration When humans breathe in oxygen, it combines with glucose to create carbon dioxide, water, and energy. Below is a list of the response. 6O2 + 6CO2 + 6H2O = C6H12O6
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The indicator in a titration changed color after 0.005 mol of calcium hydroxide
were added to to a sulfuric acid solution for the chemical reaction shown below.
How much sulfuric acid was in solution?
H₂SO4 +
Sulfuric
acid
O 0.005 mol
0.1 mol
Ca(OH)₂
Calcium
hydroxide
O 0.105 mol
O I need more information to answer this question.
CaSO
Calcium
sulfate
+
K
2 H₂O
Water
The amount of sulfuric acid in the solution is equal to 0.005 mol.
What is a pH indicator?A pH indicator can be defined as a halochromic chemical compound introduced in small amounts to a solution so the pH of the solution can be evaluated by changes in absorption or emission properties.
pH indicators are used in titrations in chemistry and biology to determine the extent of a reaction.
Given, the reaction of calcium hydroxide was added to a sulfuric acid solution.
H₂SO₄ + Ca(OH)₂ → CaSO₄ + 2H₂O
In the balanced chemical reaction, one mole of calcium hydroxide is required to neutralize one mole of sulfuric acid.
Given, the moles of calcium hydroxide = 0.005 mol
The mole of sulfuric acid is 0.005 mol required to neutralize 0.005 moles of calcium hydroxide.
The color of the solution will change when the solution becomes neutralized.
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What type of chemical reaction is CH4 O2 โ CO2 H2O?; What is the balanced form of the equation CH4 O2 โ CO2 H2O?; Is CH4 O2 โ CO2 H2O a decomposition reaction?; What type of reaction is CH4 G O2 G โ CO2 g H2O g energy?
The type of the chemical reaction is the combustion reaction.
The chemical reaction is given as :
CH₄ + O₂ ----> CO₂ + H₂O
To balance the chemical reaction , the atom in the reactant side is equal to the product side.
reactant product
C 1 1
H 4 2
O 2 3
to balance the chemical reaction multiply the 2 in O₂ and 2 in H₂O , the reaction is given as :
CH₄ + 2O₂ ----> CO₂ + 2H₂O
methane oxygen carbon dioxide water vapor
now the above equation is now balanced. the atoms in the reactant side is equals to the product side. the reaction is combustion reaction.
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what is the product of the following transformation? what is the product of the following transformation? ch3ch2ch2ocl ch3ch2ch2ots ch3ch2ch2cl ch3ch2ch2ts
In the presence of both potassium tert-butoxide and sodium amide, 1,2-dibromo-1,2-diphenylethane and 1,2-dibromo-1,2-diphenylethene are formed from 1,2-bromoethane-1,2-diyl) dibenzene.
Dehydrohalogenation example: What is it?…
is called dehydrohalogenation, for instance, and dehalogenation when both of the exiting atoms are halogens. Similar to this, dehydration is the removal of a water molecule, typically from an alcohol; when both leaving elements are hydrogen bonds, the process is referred to as dehydrogenation.
How does dehydrogenation work?Dehydrogenation is the process of taking hydrogen out of an organic compound in order to create a new compound (e.g., to convert saturated into unsaturated compounds). Alcohols are dehydrogenated in order to form aldehydes and ketones.
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in 2001, the united states produced 51 percent of its electricity in the amount of 1.878 x 10^12 kwh from coal fired power plants. taking the average thermal efficiency to be 34 percent, determine the amount of thermal energy rejected by the coal-fired power plants in the united states that year.
The amount of thermal energy rejected by the coal-fired power plants in the united states is [tex]3.646.10^{12} kWh[/tex].
What is thermal efficiency?
The ratio of the heat produced by a heat engine to the total heat units in the fuel consumed that's what is meant by thermal efficiency .
[tex]nth=\frac{Wcoal}{Qin}\\nth=\frac{Wcoal}{Qout-Wcoal} 23\\Qout=\frac{Wcoal}{nth} -Wcoal[/tex]
[tex]Qout=\frac{Wcoal}{nth} -Wcoal\\Qout=\frac{1.878.10^{12} }{0.34} -1.878.10^{12}\\=3.646.10^{12} kWh[/tex]
Therefore, the amount of thermal energy rejected by the coal-fired power plants in the united states is [tex]3.646.10^{12} kWh[/tex].
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identify the condensed structure that corresponds to the following lewis structure. the lewis structure has a main backbone, which is four carbons long. bonded to the first carbon are 3 hydrogen atoms. bonded to the second carbon are 2 hydrogen atoms. bonded to the third carbon are 2 chlorine atoms. finally, bonded to the fourth carbon are 3 hydrogen atoms.
The condensed structure that corresponds to the the lewis structure has a main backbone is 2,2 dichloro butane.
A Lewis structure, also known as a Lewis point formula, Lewis point structure, electron point structure, or Lewis electron point structure, is a diagram showing the bonds between the atoms of a molecule and the lone pairs of electrons present in the molecule.
The Lewis structure is a very simplified representation of the valence shell electrons in a molecule. Used to describe how electrons are arranged around individual atoms in a molecule. Electrons are represented as "dots" or as lines between two atoms to join electrons.
The Lewis structure is based on the concept of the octet rule in which atoms share electrons, so each atom has eight electrons in its outer shell. For example, the oxygen atom has six electrons in its outer shell.
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proceeds from notes payable on january 26, nyree co. borrowed cash from conrad bank by issuing a 45-day note with a face amount of $225,000. assume a 360-day year. a. determine the proceeds of the note, assuming the note carries an interest rate of 8%. $fill in the blank 1 b. determine the proceeds of the note, assuming the note is discounted at 8%. $fill in the blank 2
The revenues of the note will equal the $225,000 face value, provided the note has an interest rate of 8%.
The interest rate today is what.On Friday, December 9, 2022, the benchmark 30-year fixed mortgage's average rate is 7.32%, which is a 15 basis point increase from the previous week. If you want to restructure your present mortgage.
The nominal value and face value are both used interchangeably. That which a money is worth. Simply said, it is a security's nominal value. A 45-day note having a face value of $225,000 was issued by Nyree Co. to Conrad Bank based on the information provided. Consequently, the amount of the note's revenues will match its face value, which is 225,000.
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classify the tonicity of a solution made by dissolving 9.0g of sodium chloride in 1.0l of water. choose the correct answer and explanation below.
Tonicity of solution made by dissolving 9.0g of sodium chloride in 1.0l of water : solution is isotonic because it has a 0.9%m/v concentration of sodium chloride.
What do you understand by tonicity?Capability of a solution to modify the volume of cells by altering their water content is called tonicity . Movement of water into a cell can cause hypotonicity or hypertonicity when water moves out of the cell.
A solution is said to be isotonic when it has the same concentration of the solutes as another solution and this occurs across a semipermeable membrane. Use of this chemical in human anatomy is rare but it describes muscles that have a similar tone as the normal comparisons.
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Note: The question given on the portal is incomplete. Here is the complete question.
Question: Classify the tonicity of a solution made by dissolving 9.0g of sodium chloride in 1.0l of water. choose the correct answer and explanation below.
The solution is hypertonic because it has a 9.0% m/v concentration of sodium chloride.
The solution is hypotonic because it has a 9.0% mlv concentration of sodium chloride.
The solution is isotonic because it has a 9.0% mv concentration of sodium chloride.
The solution is hypertonic because it has a 0.9% m/v concentration of sodium chloride.
The solution is hypotonic because it has a 0.97 m/v concentration of sodium chloride.
The solution is isotonic because it has a 0.9% m/v concentration of sodium chloride
Calculate the number of hydrogen atoms in a 130.0 g sample of hydrazine (N2H4).. Be sure your answer has a unit symbol if necessary, and round it to 4 significant digits. x10 ? X
Atoms H= [tex]9.767*10^{24} atoms[/tex] is the number of hydrogen atoms in Hydrazine.
A base and reducing agent with a high degree of reactivity, hydrazine has numerous industrial and medical uses. In biological applications, monoamine oxidase (MAO), an enzyme that catalyzes the deamination and inactivation of some stimulatory neurotransmitters including norepinephrine and dopamine, is inhibited by hydrazine and its derivatives to produce antidepressant effects. Due to the development of tricyclic antidepressants, the use of hydrazine derivatives in psychiatry is currently restricted. (NCI04)
Since one mole of hydrazine has four moles of hydrogen and one mole of hydrogen has 6.022x10²³ atoms (Avogadro's number), we require a mass-mole-atoms connection to calculate the moles of hydrazine given its molar mass (32.06 g/mol), then the moles of hydrogen. As a result, we proceed as follows:
Atoms H=
[tex]130*\frac{1 mol }{32.06 g} *\frac{4 mol }{1 mol} *\frac{6.022*10^{23} }{1 mol}[/tex]
Atoms H=
[tex]9.767*10^{24} atoms[/tex]
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g what kind of intermolecular forces act between an ammonia molecule and a chloride anion? note: if there is more than one type of intermolecular force that acts, be sure to list them all, with a comma between the name of each force.
So therefore we will say that that is there is also iron di pole interaction.
What is Intermolecular Forces?
Intermolecular forces, frequently abbreviated to IMF, are the appealing and repulsive forces that stand up among the molecules of a substance. These forces mediate the interactions between character molecules of a substance.
Intermolecular forces are accountable for maximum of the bodily and chemical properties of rely.
Forces also exist among the molecules themselves and these are collectively known as intermolecular forces. Intermolecular forces are specifically responsible for the bodily traits of the substance. Intermolecular forces are liable for the condensed states of matter. The debris making up solids and drinks are held together by way of intermolecular forces and those forces have an effect on some of the physical residences of matter in those states.
Meaning ionic bond can be fashioned right here and right here as we've this is iron and this is the disciple nature. So consequently we are able to say that this is there's also iron di pole interplay. So these three styles of inter molecular forces is found in ammonia and chloride.
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Consider the reaction:
2 NO(g) + 5 H2(g)-2 NH3(g) + 2 H2O(g)
A reaction mixture initially contains 5 moles of NO and 10 moles of H2. Without doing any calculations, determine which set of amounts best represents the mixture after the reactants have reacted as completely as possible. Explain your reasoning.
a. 1 mol NO, 0 mol H2, 4 mol NH3, 4 mol H2O
b. 0 mol NO, 1 mol H2, 5 mol NH3, 5 mol H2O
c. 3 mol NO, 5 mol H2, 2 mol NH3, 2 mol H2O
d. 0 mol NO, 0 mol H2, 4 mol NH3, 4 mol H2O
After the whole feasible response of balanced equation, 1 mole of NO has remained withinside the response mixture is 1 mol NO, 0 mol H2, 4 mol NH3, 4 mol H2O.
The balanced chemical equation for
the response will be: 2 NO(g) + 5 H2(g)-2 NH3(g) + 2 H2O(g). The hydrogen required has been:
2 moles NO = 5 moles hydrogenfive moles NO Hydrogen five 2 G x 5 molesfive moles NO = 5 moles Hydrogen.The to be had hydrogen has been 10moles. 5 moles hydrogen = 2 moles NO2 10 moles hydrogen NO x 10 moles10 moles hydrogen = four moles NO.The whole usage of hydrogen calls for four moles of NO. The to be had NO has been 5 moles. The final NO has been given as:Remaining NO = Total - consumedRemaining NO = 5-4Remaining NO = 1moleAfter the whole feasible response of the mixture, 1 mole of NO has remained withinside the response mixture.Learn more about reactant :
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what are the two types of compounds used to make esters? give an example of each. clearly identify their functional groups.
Alcohols and carboxylic acids are the two types of compounds used to make esters.
An esters is a molecule created from an oxoacid (organic or inorganic) in which at least one hydroxyl group (OH) is replaced by an alkoxy group, similar to the substitution process between a carboxylic acid and an alcohol (OR). Glycerides are important in biology since they are one of the primary lipid groups and make up the majority of animal fats and vegetable oils. Fatty acid esters of glycerol are known as glycerides. The majority of esters are fragrant; those with a low molecular weight are widely used as fragrances and can be found in pheromones and essential oils. They are one of the most widely used types of synthetic lubricants on the market and act as premium solvents for numerous polymers, plasticizers, resins, and lacquers. The parent acid, which may be organic or inorganic, and the parent alcohol are what give esters their names. Esters made from the simplest carboxylic acids are usually referred to by the more common, so-called "trivial names," such as formate, acetate, propionate, and butyrate, as opposed to the IUPAC nomenclature methanoate, ethanoate, propanoate, and butanoate.
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a sample of an ideal gas with initial volume v is compressed isothermally until its volume is v2. which of the following claims is correct about the transfer of energy by heating and the work done on the gas?
a sample of an ideal gas with initial volume v is compressed isothermally until its volume is v2.Energy Transferred by Heating: Out of the gas Work Done on the Gas: Positive
Energy, according to scientists, is the capacity for work. The ability to transform energy from one form to another and use it to perform tasks is what makes modern civilization possible. Energy is characterized as having the "ability to accomplish work, which is the capacity to apply a force sufficient to move an object." Despite this unclear definition, the concept is actually quite straightforward: energy is just the force that moves objects. Potential and kinetic energy are the two different categories. The basic energy unit of the metric system, or the International System of Units in a later, more thorough formulation, is this (SI). The meter, kilogram, and second serve as its final units of measurement.
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Consider the reaction A → products at 311 K. The concentration of A was monitored over time and the data was analyzed by plotting. It was found that a plot of 1/[A] vs time gave a straight line relationship. It was also observed that it took 24.5 s for the concentration of A to decrease from 0.757 M to 0.107 M. What is the half life for this reaction when [A]o = 0.757 M?
The half life for this reaction when [A]o = 0.757 M is 4.033 s
integrated rate law for 2nd order reaction:
1/[A]o = 1/[A] - k*t
so, for 2nd order reaction, 1/[A] vs t will be straight line
integrated rate law for 1st order reaction:
ln [A] = –kt + ln [A]o
So, for 1st order reaction, ln[A] vs t will be straight line
integrated rate law for zero order reaction:
[A] = [A]o – k*t
So, for zero order reaction, [A] vs t will be straight line
Here,
1/[A] vs t is straight line
so, order of A is 2
use integrated rate law for 2nd order reaction:
1/[A] = 1/[A]o + k*t
1/(0.107) = 1/(0.757) + k*24.5
9.346 = 1.321 +k*24.5
k*24.5 = 8.025
k = 0.328 M-1.s-1
Given:
rate constant, k = 0.328 M-1.s-1
use relation between rate constant and half life of 2nd order reaction
t1/2 = 1/([A]o*k)
= 1/(0.757*0.328)
= 4.033 s
The half-life of a chemical reaction can be defined as the time it takes for the concentration of a given reactant to reach 50% of its initial concentration (that is, the time it takes for the concentration of a reactant to reach half its initial value). This is represented by the symbol "t1/2" and is usually expressed in seconds.
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Fill in the missing products below. 1) Hg(OAC),, EtOH 2) NaBH4 Excess HI Heat RCOZH H-CEC: Na ? colet 1) NaSET 2) H2O ? HBr HBr ?
Depending on the exact conditions, NaBH4 reduces many organic carbonyls. Most commonly used in the laboratory to convert ketones and aldehydes to alcohols.
Efficient reduction of acyl chlorides anhydrides α-hydroxylations thioesters and imines below room temperature. NaBH4 is less reactive than LiAlH4 but otherwise similar. It is powerful enough to reduce aldehydes ketones and acid chlorides to alcohols. Esters amides acids and nitriles are hardly affected.
Sodium borohydride, also known as sodium borohydride and sodium tetrahydroborate, is an inorganic compound of the formula NaBH4. This white solid is usually found as a basic aqueous solution and is a reducing agent used in the paper and dyeing industry.
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(28 points}
I. Calculations (final answers must be rounded to the appropriate significant figures)
[Please round formula weights to 1 decimal place.]
1. Calculate the number of grams of solute needed to prepare 0.50L of a 60.0 mM NaHCO3
solution. [4 pts]
I would like to make a 0.50 M solution of K2SO4; however I find that there is only 37.193
of K2SO4 left. How many milliliters of solution can I make? [4 pts]
(48) trigis ont to
02
Calculate the number of grams of solute needed to prepare 0.25 L of an 5.5% (w/v)
Sn3(PO4)4 solution. [3 pts]
To calculate the required number of moles of NaCl, multiply the concentration (0.5 mol/liter) by the desired volume of solution (0.5 litri). To calculate the necessary grammes of solute, multiply the moles of NaCl by their molar mass (58.44 g/mol).
For the preparation of 1.00 L of 0.200 M NaCl, how many grammes of solute are required?In a 0.200 M solution, there are 0.200 moles of solute in a 1 litre solution. 1 mole of NaCl has a mass of 58.5 grammes. The mass in 0.200 moles of NaCl is equal to 0.200 x 58.5, or 11.7 grammes. As a result, 11.7 grammes of solute are dissolved in the one litre of solution.
How would you make a 100 mL solution of 0.5 M HCl?Add distilled water while shaking to fill the container to the 1L mark.
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What is the number of chloride ions (Cl-) in 250 mL of a 0.2M magnesium chloride solution?
Thank you.
To determine the number of chloride ions (Cl-) in 250 mL of a 0.2M magnesium chloride solution, we need to use the formula:
number of ions = concentration (M) * volume (L) * Avogadro's number
In this case, the concentration is 0.2 M, the volume is 250 mL, and Avogadro's number is 6.022 x 10^23 ions/mol.
To convert the volume from milliliters to liters, we can divide the volume by 1000. This gives us a volume of 250 mL / 1000 mL/L = 0.250 L.
Substituting these values into the formula above, we get:
number of ions = 0.2 M * 0.250 L * 6.022 x 10^23 ions/mol
= 0.2 M * 0.250 L * 6.022 x 10^23 ions/mol
= 1.204 x 10^23 ions
Therefore, there are approximately 1.204 x 10^23 chloride ions (Cl-) in 250 mL of a 0.2M magnesium chloride solution.
The mass of a (235) (92) U nucleus is ____ separated from each other. the sum of the masses of a (141) (56) Ba nucleus, a (92) (36) Kr nucleus, and two neutrons, all separated from each other.O greater than O equal to O less than
The combined masses of two neutrons, a (92) (36) Kr nucleus, a (141) (56) Ba nucleus, and a (235) (92) U nucleus are more than that of a (235) (92) U nucleus.
A little amount of mass is transformed into energy in nuclear reactions.
This indicates that the overall mass of the reactants is lower during nuclear reactions than the mass of the products.
The (141) (56) Ba nucleus, the (92) (36) Kr nucleus, and two neutrons, which are byproducts of the nuclear reaction, all have masses that are greater than the mass of the (235) (92) U nucleus.
Thus, The combined masses of two neutrons, a (92) (36) Kr nucleus, a (141) (56) Ba nucleus, and a (235) (92) U nucleus are more than that of a (235) (92) U nucleus.
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Which of the following is the correct statement of law of conservation of matter?
According to the principle law of conservation of mass, matter cannot be created or destroyed.
What law governs the conservation of matter?According to the Law of Conservation of Matter, even when matter transforms into a different form, the amount of matter remains constant. Although it may occasionally appear that matter vanishes during a scientific experiment, this law informs us that matter does not magically appear or vanish; rather, it only transforms from one form to another.
What is the mass Mcq conservation law?A chemical reaction neither creates nor destroys atoms.Only the products are produced after the reactants' atoms have been rearranged. Therefore, mass remains constant during a chemical process.
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consider the protons highlighted in red in the four structures shown. the red protons are homotopic in which structures?
A and D are enantiotopic and B and C are homotopic.
If replacing two protons with a different group (X) gives the same compound, the protons are called Homotopic. If replacing two protons with a different group (X) gives a pair of enantiomers, the protons are called Enantiotopic.
Homotopic, simply means identical. For example, all the protons in ethane are homotopic. Even tough each proton is physically different, but we say that they are identical because the rotation about the C-C single bond is so fast that averagely speaking all the protons appear in the same environment.
Replacing the hydrogens in order to determine the relationship of the protons and hence the number of NMR signals may look overwhelming and confusing and if it all seems too much for determining the relationship of the protons and the number of expected signals.
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in addition to allowing a gentle energy drop for the electrons, the electron transport chain also creates
The electron transport chain produces a hydrogen ion gradient in addition to allowing a gentle energy drop for the electrons.
The elementary electric charge of the electron (or), a subatomic particle, is a negative one. Due to their lack of known components or substructure, electrons, which are part of the lepton particle family's first generation, are typically regarded to be elementary particles. The mass of an electron is around one-eighth that of a proton (1/1836). The electron's inherent angular momentum (spin), which is measured in terms of the scaled-down Planck constant, is one of its quantum mechanical properties. The Pauli exclusion principle states that because electrons are fermions, no two of them may be in the same quantum state. Since they can collide with other particles and can be diffracted like light, electrons share characteristics with all elementary particles.
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