E= -5.23 × 10^-19 J/ion pair for Cs+ Br- ion pair.
E= -1.58 × 10^-18 J/ion pair for Mn2+ O2- ion pair.
therefore, lattice energy of second compound is higher than the first one.
Lattice energy is the bond energy of the compound which is now seperated.
Formula: E = (kq1q2)/r
now inserting the values for Cs+ and Br- into the equation,
where q1 = +1, q2 = −1, and r = 441 pm
Energy associated with the formation of a single pair of Cs+Br-
E= 2.31×10^-28 (+1)(-1)/441 × 10^-12
E= -0.00523 × 10^-16
E= -5.23 × 10^-19 J/ion pair
now inserting the values for Mn+2 and O2- into the equation,
where q1 = +2, q2 = −2, and r = 292 pm
Energy associated with the formation of a single pair of Mn+2O-2
E= 2.31×10^-28 (+2)(-2)/292× 10^-12
E= -0.0158 × 10^-16
E= -1.58 × 10^-18 J/ion pair
Therefore comparing both the ion pairs , the lattice energy of Mn+2 O2- pair is higher than the Cs+ Br- ion pair.
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How to find a radicals in a compound in grade 9
Answer:
In order to find radicals in a compound, count how many hydrogen atoms are in the formula. This is the valency of the radical.
Explanation:
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which of the following did you use the refractive index data from the distillation to determine? group of answer choices purity of the first fraction purity of the fourth fraction purity of all fractions ratios of the components in each fraction
The answer is purity of all freactions.
Miscible liquids must be separated during the distillation process known as fractional distillation. The procedure entails numerous condensations and distillations, and the mixture is often broken down into its component elements. When the combination is heated to a particular temperature where portions of the mixture begin to evaporate, the separation occurs.
Two helpful physical characteristics of a liquid are its boiling point and refractive index (RI). They serve as identifiers. The purity of the sample under examination is also measured using the RI.
So that means, Refractive index is used for purity of all the fractions of the sample.
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photons with a wavelength of 353 nm have just enough eneryg ot rupture the c-cl bond in cf3cl. what is the bond dissociation energy in kj/mol
[tex]5.64 * 10^{-19 J}[/tex]
We know that
Dissociation energy = h ν
Where h is planks constant
ν = C / λ
where λ is the wavelength = 353nm = [tex]3.53 * 10^{-7} m[/tex]
Dissociation energy = h C / λ
Ed = [tex](6.62 * 10^{-34 }Js * 3 * 10^{8} m /s) / 3.53 * 10^{-7} m[/tex]
Ed = [tex]5.64 * 10^{-19 }J[/tex]
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TRUE/FALSE glycolysis occurs in the , the citric acid cycle takes place in the , and the electron transport chain is located in the .
Glycolysis occurs in the cytoplasm of the cell, the citric acid cycle takes place in the mitochondria, and the electron transport chain is located in the inner membrane of the mitochondria.
The primary metabolic process of cellular respiration that produces energy in the form of ATP is glycolysis. Through a series of enzyme processes, glucose is "cleaved" or broken down into two three-carbon sugars of pyruvate. Glycolysis yields a net gain of two pyruvate molecules, two ATP molecules, and two NADH molecules for the cell to use as energy. The Krebs Cycle is linked to the glycolytic pathway after glucose is converted to pyruvate, where more ATP will be produced to supply the energy needs of the cell. The first stage of aerobic respiration is called glycolysis. It involves the division of a glucose molecule into two pyruvate molecules. NAD+ acts as an electron acceptor in the redox processes of glycolysis.
During glycolytic processes, NAD+ is reduced to NADH, which is then oxidized back during aerobic respiration by oxidative phosphorylation.
One molecule of glucose enters glycolysis and splits into two molecules of pyruvate and two molecules of NADH, using a total of two molecules of NAD+ as the electron acceptor.
The complete question is:
Please fill in the blanks
Glycolysis occurs in the ______, the citric acid cycle takes place in the ________, and the electron transport chain is located in the __________.
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As a result of a labeling mistake at the chemical factory, a farmer accidentally sprays weedkiller rather than fertilizer on half her land. As a result, she loses half of her productive farmland. If the property of diminishing returns applies to all factors of production, she should expect to see.
If the property of diminishing returns applies to all factors of production, she should expect to see an increase in marginal productivity of her remaining land and decrease in marginal productivity of her labor.
In the given question the half of the land is damaged due to the weed killer. factors for production she expect to see is in marginal productivity of her remaining land and decrease in marginal productivity of her labor.
Thus, If the property of diminishing returns applies to all factors of production, she should expect to see an increase in marginal productivity of her remaining land and decrease in marginal productivity of her labor.
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12.53 (syn) show how each of these compounds can be produced from an alkene or alkyne. draw the appropriate alkene or alkyne and include any necessary reagents and special reaction conditions.
The structures of alkanes and alkynes are given below in the diagram.
In organic chemistry, when an organic compound contains atoms joined only by single covalent bonds, the compound is said to be saturated and this saturated hydrocarbons are known as alkanes. For example propane that is shown in the diagram attached below. When an organic compound contains carbon atoms joined by double(alkene) or triple(alkyne) covalent bonds, the compound is said to be unsaturated. For example propene and propyne as shown in the diagram.
Furthermore, the hydrocarbons that possess a set of carbon-carbon double covalent bonds,>C=C<, in their carbon chains form the homologous series called alkenes while those possessing a set of carbon-carbon triple covalent bond in their carbon chains form the alkyne series.
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Which best describes the quaternary structure of a protein?.
Hemoglobin describes the quaternary structure of a protein better.
The complete stable structure of proteins has 4 different levels which are the primary structure, secondary structure, tertiary structure, and quaternary structure. The primary structure is the specific amino acid sequence that is held together by the peptide bonds. The secondary structure is the repeated arrangement of the amino acid backbone. The tertiary structure is the three-dimensional arrangement of the protein structure. Lastly, the quaternary structure is generally the association of different polypeptide bonds in a more complex way.
Hemoglobin has a quaternary structure. It consists of two pairs of different proteins, that are designated the α and β chains. There are 141 and 146 amino acids in the α and β chains of hemoglobin, respectively.
Hence we can say that Hemoglobin describes the quaternary structure of a protein better.
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the prosecutor wanted to convince the jury that the suspect could have created an explosive with common household chemicals, so she asked a professor with earned by studying explosive chemicals for 20 years, to take the stand.
In order to persuade the jury that the suspect could have made an explosion using simple home chemicals, the prosecutor consulted a professor who had expertise in explosive chemicals.
Non-food chemicals used often in and around the typical home are referred to as home chemicals. They are a category of consumer goods frequently kept in the kitchen or garage that are specifically made to help with cleaning, cooking, cooking maintenance, house and yard upkeep, pest control, and general hygiene. Are called home chemicals.
An explosive chemicals is a material or mixture that reacts violently to an ignition source by combusting. This reaction is an exothermic process that causes a huge quantity of energy to be released quickly. It is also characterized by a quick, violent release of pressure called explosive chemicals.
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calculate the ph at of a solution of potassium cyanide . note that hydrocyanic acid is a weak acid with a of . round your answer to decimal place.
The pH at 25 °C of a 0.19 M solution of potassium cyanide . note that hydrocyanic acid is a weak acid with pka of 9.21 is 11.2.
The reaction is given as :
KCN ---> K⁺ + CN⁻
CN⁻ + H₂O ⇄ HCN + OH⁻
KCN = HCN = 0.19 M
pka(HCN) = 9.21
ka HCN = 6.16 × 10⁻¹⁰
kb CN⁻ = 10⁻¹⁴ - 6.16 × 10⁻¹⁰
= 1.62 × 10⁻⁵
[HCN] [OH⁻] = X
[CN⁻] = 0.19 M - x
kb = x² / (0.19 M - x )
1.62 × 10⁻⁵ = x² / (0.19 M - x )
x = [OH⁻] = 0.00174 M
the pOH = - log (0.00174)
pOH = 2.76
pH + pOH = 14
pH = 14 - pOH
pH = 14 - 2.76
pH = 11.2
Thus, The pH at 25 °C of a 0.19 M solution of potassium cyanide . note that hydrocyanic acid is a weak acid with pka of 9.21 is 11.2.
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What is the maximum number of days chicken salad prepared in house may be held at 41f 5c or below?.
The maximum number of days chicken salad prepared in house may be held at 41 F or 5 °C or below is 7 days.
The chicken salad that prepared in the house may be help at 41 F or 5 °c or below for the maximum number of days are seven days. after that the bacteria can be grow at chicken salad. The maximum cold storage time for the chicken salad is for the three to five days. it is recommended for you that you don't keep the chicken salad for more than the five days.
Thus, the prepared chicken salad in the house may be held for 41 F or 5 °C for maximum seven days.
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if 4-methylcyclohexanol is used as starting material, is there evidence for the occurrence of carbocation rearrangements?
After a carbocation rearrangement (hydride-shift) to a tertiary position, methylene cyclohexane is formed. Methylene becomes cyclohexane when the proton and hydrogen are removed.
What is carbocation rearrangements?The migration of a carbocation from an unstable form to a more stable one using different structural reorganizational "shifts" inside the molecule is known as a carbocation rearrangement, which is a common process in organic chemistry.A rearrangement is feasible because the SN1 mechanism involves the creation of a carbocation. Let's examine this SN1 reaction now. Our alkyl halide is on the left, ethanol is our solvent, and our product is on the right.Methylene cyclohexane is created by a carbocation rearrangement (hydride-shift) to a tertiary position. When the proton and hydrogen are taken out of methylene, cyclohexane results.To learn more about carbocation rearrangements refer to:
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How do you get iron from where it naturally occurs?
How is the element processed to make it usable?
(Pls help this is due tmr!!)
Well, Sedimentary rocks contain the largest iron ore resources on earth. In both freshwater and marine environments, iron and oxygen mixed in chemical reactions to make them. Hematite (Fe2O3) and magnetite are the two most significant iron oxide minerals in these deposits. Almost all of the iron and steel items we use today were made using these iron ores that were mined. Major iron ore reserves on Earth are almost entirely found in rocks that were produced more than 1.8 billion years ago. Oceans on Earth at that time had little to no dissolved oxygen and a lot of dissolved iron. When the first species capable of photosynthesis started releasing oxygen into the waters, the iron ore deposits started to emerge. The plentiful dissolved iron and this oxygen immediately interacted to form magnetite or hematite. These minerals were very abundant when they were deposited on the ocean floor, creating what are now referred to as "banded iron formations." The iron minerals deposited in alternating bands with silica and occasionally shale, which is how the rocks became "banded." Possible causes of the banding include seasonal variations in organism activity.
Put it in the simplest way for the second question:
Iron ore must first be collected from the ground and partially processed to eliminate the majority of the impurities before it can be utilized.
Thanks!
use lechateliers principle to predict the effects if any of each of the following changes on the equilibrium system described below in a closed container a. c is added
The forward and reverse reactions are happening simultaneously, but the system is in a balanced condition since all of the material concentrations are constant. The majority of chemical processes that occur in the human body are governed by the equilibrium process.
What is Equilibrium system ?The forward and reverse reactions are happening simultaneously, but the system is in a balanced condition since all of the material concentrations are constant. The majority of chemical processes that occur in the human body are governed by the equilibrium process.
Several instances of equilibrium include: a book that is open and at rest. a vehicle that is going steadily. a chemical process where both the forward and backward rates of reaction are equal.
Examples of equilibrium include a book that is at rest on a table. a vehicle that is going steadily. a chemical process where both the forward and backward rates of reaction are equal.
What is Lechateliers principle ?Le Chatelier's principle, commonly known as Chatelier's principle, is a chemical principle that is used to foretell how a change in circumstances will affect chemical equilibria.
The Le Chatelier principle explains how an equilibrium changes when its conditions change. For variations in concentrations, temperature, or pressure, the shift's direction can be predicted. Although catalysts speed up the process of reactions reaching equilibrium, they do not change the location of an equilibrium.
There was distilled water in the
Cuvette when the student placed standard Solution init.
Explanation ;In the above graph shown in question, the absorbance is less than actual at o'o som co't It means there are error in concentration and concentration is less than actual.So, it is only possible in case of dilution.So, so, Student Put Solution in cuvette before removing distilled water presentinit. That causes decreases in concentration.To know more about Lechateliers principle please click here ;
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paringly Soluble Salt (A) Fill in the table Step Procedure Mixing 0.1 M Na.co, and 0.1 M CaCl2 Observation made Percipi Eate (B) Write the balanced chemical reaction taking place when Naco, is mixed with CaCl, (this is a double replacement reaction). Include all phases and write correct product formulas. (C) Write the net ionic equation taking place for the reaction in (B). (This (4) is your equilibrium reaction) (4) (D) Fill in the table Step Procedure Observation Adding 6 M HCI destroyed the percipitate, The added HCl (the stress) reacts according to the following equations: 2H+ (aq) + CO, HCO, (aq) → H20 (1) + CO:8) (E) Look at the net ionic reaction (your equilibrium reaction (4) above). Which ion from (4) did * react with? (F) Why did the calcium carbonate decompose when the HCI was added? (G) Explain how Le Chatelier's principle was demonstrated in this experiment. How did the addition of H" (aq) stress the equilibrium reaction and howvdid the reaction shifted to compensate for the stress.
Na2CO3 (aq) + CaCl2(aq) → CaCO3 (s) + 2 NaCl (aq) is balanced chemical reaction
"Balancing by inspection," often known as trial and error, is the most fundamental and widely used technique for balancing chemical equations. Several strategies can be employed to lessen the number of tries and errors necessary to generate an equation that is ultimately suitably balanced. The conservation of matter criterion must be followed in order for a chemical equation to be considered balanced. There are two different kinds of numbers that are employed in chemical equations. In the chemical formulations of the reactants and products, subscripts are employed. Additionally, coefficients are used to show how many molecules of a certain substance are used up or produced before chemical compositions.
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What type of reaction is NH4NO3 → 2H2O N2O?.
NH4NO3 -----> 2H2O + NO2 is a Redox Reaction . It undergoes redox reaction to give H2O and NO2 .
According to electronic concept every redox reaction consists of two steps known as half reactions.one is Oxidation reaction . Half reactions that involve loss of electrons are called oxidation reactions. and the other one is Reduction reaction . Half reactions that involve gain of electrons are called reduction reactions. Redox is a type of chemical reaction in which the oxidation states of substrate change. Oxidation is the loss of electrons or an increase in the oxidation state, likewise, reduction is the gain of electrons or a decrease in the oxidation state. Basically oxidation - reduction occurring together is a Redox reaction.
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How does the setting influence the main character in the text the setting allows the main character?.
Setting has an impact on the narrative through influencing the growth and theme. It also has an impact on the narrative by drawing the reader in and assisting them in picturing the occasions and setting of the story.
What influence does chemistry have on our lives?Chemistry provides for all of our basic needs, including food, clothing, shelter, health, energy, and clean air, water, and soil. Chemical technologies provide new solutions to problems with hygiene, resources, especially energy usage, which enhance our quality of life in many ways.
What does the word "influence" mean?The term in current usage often refers to the capacity to influence someone or something, particularly the capacity to bring about changes without exerting direct pressure.
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6. What is the volume of a box measuring 8mmX10cmX5cm?
Answer:
40
Explanation:
1mm = 0.1cm
8mm =0.8m
0.8X10X5
=40
g which of these elements is not a constituent of carbohydrates? i.all of the choices are constituents of carbohydrates. ii.oxygen iii.nitrogen iv.carbon v.hydrogen
The breakdown of food provides energy for the organism's body. When carbohydrates are converted into simpler sugars like glucose, they become a more complicated kind of food nutrient.
What purposes do carbs serve?
Carbohydrates, also referred to as "carbs," are necessary at every stage of life. They serve as the body's primary energy source and the brain's preferred energy source. Carbohydrates are transformed by the body into glucose, a type of sugar. Glucose is used as fuel by the organs, tissues, and nerves.
What kinds of carbs are there?
Sweeteners (including such sugar, glucose, and lac) and starches, that are present in foods like starchy veggies, grains, rice, bread, and cereals, are the two main types of carbs. The body shatters
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what pressure would be required on the plunger to cause water to flow from left to right? see section 35.1 (page) .
0.1MPa pressure would be required on the plunger to cause water to flow from left to right.
what is pressure?the force applied perpendicularly to an object's surface divided by the surface area over which it is applied.
The pressure exerted on the surface by a force of magnitude "F" Newton when applied perpendicularly to surface area "A" is equal to the ratio of F to A. The pressure (P) formula is as follows:
P=F/A
The pascal is the pressure unit used in SI (Pa).
A force of one newton applied across a surface area of one metre square is referred to as a pascal.
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a mixture of two gases with a total pressure of 1.80 atm contains 0.70 atm of gas a. what is the partial pressure of gas b in atm?
Partial pressure of gas B in a mixture of two gases with a total pressure of 1.80atm is 0.90atm.
Partial pressure of a gas is explained by Daltons law of partial pressure. According to the law, the total pressure in a mixture of gas is the sum of the partial pressure of each gases.
P = P1 + P2...
where P is the total pressure of the gas in the mixture. P1 and P2 are the partial pressure of each gases. Partial pressure of gas A is 0.70atm and the Total pressure of the mixture of the gases is 1.80atm.
so partial pressure of gas B is obtained by substracting total pressure of the gases by partial pressure of the gas A .we already have the value of total pressure of the gases and the partial pressure of gas A . putting the value of the both in the expression,
P2 = P - P1
= 1.80atm - 0.70atm
= 0.90atm
so the partial pressure of gas B is 0.90atm.
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n a 2 s ( a q ) na2s(aq) and h g ( n o 3 ) 2 ( a q ) hg(no3)2(aq) are mixed. the illustration below represents the system after there are no longer any observable changes. created for albert. all rights reserved. which of the following statements most accurately describes the reaction?
Sodium sulfide is created when the elements sodium (Na) and sulfur (S) combine. It is a combination reaction, and the balanced equation is 2Na(s)+S(s)fuseNa2S.
If the resulting compound is water-insoluble, a precipitate will form. For instance, a solution of magnesium bromide and silver nitrate (AgNO3) In these reactions, two compounds exchange ions to create two new compounds. As an illustration, consider Na2S + 2HCL + 2NaCl + H2S.
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5. Which is true when a piece of paper is
crumbled? sC.8.P.9.1
A Volume and mass increase.
B
Volume and mass decrease.
C) Volume and mass do not change.
OD Volume might decrease or increase, but
mass does not change.
in a 51.0-g51.0-g aqueous solution of methanol, ch4o,ch4o, the mole fraction of methanol is 0.100.0.100. what is the mass of each component?
Definition of mole fraction to find a relationship between the number of moles of methanol, and the number of moles of water.
Mole fraction is defined as the ratio between the number of moles of a component of a solution and the total number of moles present in that solution.
mole fraction = Number of moles / Total moles
mole fraction of methanol = 0.100
Solution contains methanol, solute and water, solvent. Let x be the number of moles of methanol and y to be the number of moles of water.
then, mole fraction of methanol = x/(x+y) = 0.100
number of moles of methanol, x = 0.100(x+y)
Solution has a total mass of 51.0g
The number of moles of methanol and the compound's molar mass to determine the mass present in solution.
mass percent of methanol = 32(x) g
mass percent of water = 18(y) g
and given mass of mixture is 51g
=> 51 = 32x+18y
again, number of moles of methanol,
x = 0.100(x+y)
0.9x = 0.1y
x/y = 1/9
x = y/9
In equation,
51 = 32x+18y
51 = 32(y/9) +18y
459 = 32y + 162y
y = 2.3 moles of methanol.
hence, x = 0.26 moles of water
Now, use this formula to determine mass of each compound
mass = number of moles * Molar mass
mass of water = 0.26*18 = 4.68 g
mass of methanol = 2.3*32 = 8.41 g
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What is an intoxicated person?.
Influenced by drugs or alcohol, especially to the extent where one's ability to exert significant control over their body and mind. especially while intoxicated. happy or delighted on the inside.
Intoxicated: Is it good or bad?Risks to long-term health. Chronic illnesses and other grave issues, such as elevated blood pressure, cardiovascular diseases, stroke, liver cirrhosis, and digestive issues, can develop over time as a result of heavy alcohol consumption.
Explain what intoxicated is.a molecule that may be found in alcoholic beverages including beer, wine, as well as liquor. Additionally, it may be discovered in several medications, mouthwashes, home goods, including essential oils.
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How are amino acids linked into proteins?.
Peptide bonds,also known as amide groups,bind amino acids together.a water molecule is released by the amino group of an incoming amino acid.Peptide bonds are the resultant link between the amino acids.
A protein is a macromolecule made up of monomers of amino acids.
An amino group, a carboxyl group, a variable R group, and a central carbon atom bound to a hydrogen atom make up amino acids.The R group is frequently referred to as a side chain. The particular shape and characteristics of an amino acid (and subsequently the proteins generated) are dictated by the R group because all amino acids have the same basic structure. Many amino acids are combined into polypeptides, which are then joined by peptide bonds. It is a dehydration reaction that results in the formation of a peptide bond between the carboxyl groups of two different amino acids.Protein's primary structure is determined by its amino acid sequence. Disulfide bonds form in polypeptides, creating the secondary structure of proteins.
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What is the same before and after a nuclear reaction?.
The total energy (mass and energy) is the same before and after any nuclear reaction.
What is nuclear reaction ?A nuclear reaction is a process in which two nuclei or a nucleus and an outside subatomic particle collide to create one or more new nuclides. This process occurs in nuclear physics and nuclear chemistry. Therefore, at least one nuclide must change into another as a result of a nuclear reaction.
In a typical nuclear reaction, two particles interact a heavy target nucleus and a light bombardment particle and two new particles are created a heavier product nucleus and a lighter ejected particle.Although matter transforms into energy in nuclear processes, the combined amount of mass and energy remains constant.Learn more about Nuclear reaction here:
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of the following molecules, only is polar. question 37 options: a) cbr4 b) sih2cl2 c) bf3 d) becl2 e) cl2
Of the molecules, only SiH2Cl2 is polar.
What is Polar molecules?A molecule or its chemical groups have an electric dipole moment with a negatively charged end and a positively charged end when they are polar, which in chemistry is the separation of electric charge. Because the bonded atoms' electronegativity differs, polar compounds must have one or more polar bonds. Positive and negative charge areas are found in polar compounds. An illustration of a polar substance is water. Given its form and type of bonds, the molecule has a slight positive charge at one end (the hydrogen end) and a slight negative charge at the other (the oxygen end). Of the following molecules, only SiH2Cl2 is polar.The complete question is,
23) Of the following molecules, only ________ is polar.
A) BeCl2
B) BF3
C) CBr4
D) SiH2Cl2
E) Cl2
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In the reaction of magnesium metal with hydrochloric acid, how do you determine when the magnesium metal has reacted completely? Select all that apply.
Mg(s)+2H+(aq) →Mg2+(aq)+H2(g)
The magnesium metal has reacted completely:
Gas bubbles are no longer produced.The magnesium metal is gone.When the magnesium ribbon reacts with hydrochloric acid magnesium chloride is formed and hydrogen gas is released. The temperature of the test tube changes, slight bubbles are generated, and the magnesium ribbon dissolves in the water and turns blue.
Magnesium reacts with acids to produce visible hydrogen gas bubbles. The combustion of magnesium is an exothermic reaction because energy is released into the environment when particles of magnesium and oxygen collide and form new bonds. Citric acid and baking soda are endothermic when the temperature drops. Magnesium and hydrochloric acid generate heat when the temperature rises.
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What would form a negative ion?.
If an extra electron is pushed into the atom so that it has an excessive number of electrons then it would form a negative ion.
The right side of the Periodic Table, or the side with no metals, is where non-metals are located.
Atoms generally experience atomic radius contraction as a result of adding electrons to the same valence shell and protons to the nucleus, with the smallest atoms to the right of the Periodic Table
As a result, the elements on the right side of the Periodic Table, such as fluorine, chlorine, and oxygen, Tend to be oxidizing, which means that their unshielded nuclear charge causes them to accept electron density.
N³⁻,O²⁻,F⁻ and Cl⁻
Clearly, the Parent atoms (or molecules) are unquestionably oxidizing species.
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assume the given amount of rbf fully dissociates in water. calculate the molarity of a solution if 124.86 g of rbf are dissolved into a solution of water that has a final volume of 2.00 l.
Molarity of a solution if 124.86 g of rbf are dissolved into a solution of water that has a final volume of 2.00L is 0.59.
What is molarity?Molarity is used for dilute aqueous solutions held at a constant temperature. In general, the difference between molarity and molality for aqueous solutions near room temperature is very small and it won't really matter whether you use a molar or molal concentration.
MOLARITY = no of moles of solute/volume of soln in litres
No of moles of rbf = 124.6/104.46
= 1.19
Volume of soln = 2
Molarity=1.19/2 = 0.59
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