The cyclohexane ring is essentially free of ring strain because:
What is cyclohexane?
Cyclohexane is a cyclic hydrocarbon with the molecular formula C6H12. It is a colorless, flammable liquid that is commonly used as a nonpolar solvent in chemical reactions and as a starting material for the synthesis of other compounds. Cyclohexane is a cycloalkane, which means it contains a closed ring of carbon atoms.
There are no eclipsed interactions in the chair conformation of cyclohexane.There are no gauche interactions in the chair conformation of cyclohexane.The bond angles in the chair conformation of cyclohexane are close to the ideal tetrahedral angle of 109.5 degrees, which minimizes the angle strain in the molecule.The chair conformation of cyclohexane allows for maximum separation of the substituents on the ring, which minimizes the torsional strain in the molecule.All of these factors contribute to the stability of the chair conformation of cyclohexane and the absence of ring strain in the molecule.
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How do you write the electron configuration for CA?
The electronic configuration of the calcium, Ca is as :
1s² 2s² 2p⁶ 3s² 3p⁶ 4s² .
The atomic number of the calcium is 20. The total number of the protons are 20 , the number of the electrons are 20, and the number of the neutrons are 40. The electronic configuration of the calcium is as follows :
The electronic configuration of calcium, Ca = 1s² 2s² 2p⁶ 3s² 3p⁶ 4s²
The Calcium is the mineral most often it is associated with the healthy bones and the teeth. It is belongs to the group 2 that is the metal, it is also known as the alkaline earth metal, and it had no populated d-orbital electrons.
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You find a mineral sample that is yellow, has a white streak, and has a
hardness of 2.5., The sample is most likely which mineral?
Mineral
Gold
Color
Streak
Golden yellow Yellow
Yellowish gray
to gray
Black
Reacts with Hardness
hydrochloric
acid
No
No
2.5-3
6-6.5
A. Pyrite
B. Calcite
C. Sulfur
D. Gold
You find a mineral sample that is yellow, has a white streak, and has a hardness of 2.5 therefore the sample is most likely a mineral known as calcite and is therefore denoted as option B.
What is a Calcite?This is referred to as a carbonate mineral and the most stable polymorph of calcium carbonate. It is a very common mineral, particularly as a component of limestone.
It has a hardness in the region of 3 and is yellow, has a white streak in terms of the color and appearance and is therefore the reason why it was chosen as the correct choice.
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How many grams of NaOH are required to produce 9.23 moles of NaCl?
Step-by-step please
Answer:
369.20 grams of NaOH are required to produce 9.23 moles of NaCl.
Explanation:
To answer this question, we need to know the balanced chemical equation for the reaction between NaOH and HCl, assuming that the reaction takes place in an aqueous solution:
NaOH + HCl → NaCl + H2O
According to this equation, 1 mole of NaOH reacts with 1 mole of HCl to produce 1 mole of NaCl and 1 mole of water.
To calculate the amount of NaOH required to produce 9.23 moles of NaCl, we need to use the mole ratio between NaOH and NaCl from the balanced equation. Since the mole ratio is 1:1, we know that we need 9.23 moles of NaOH to produce 9.23 moles of NaCl.
The molar mass of NaOH is 40.00 g/mol, which means that 1 mole of NaOH weighs 40.00 grams. Therefore, 9.23 moles of NaOH weighs:
9.23 moles x 40.00 g/mol = 369.20 grams of NaOH
So, 369.20 grams of NaOH are required to produce 9.23 moles of NaCl.
How many liters of glycerin should be added to 12 liters of an 8% glycerin solution so that the resulting solution contains 16% glycerin? round the answer to the nearest hundredth if necessary. Original (l)added (l)new (l)amount of glycerin0. 96x0. 96 + xamount of solution12x12 + x0. 18 liter1. 14 liters1. 92 liters2. 10 liters.
A total of 0.96 liters of glycerin should be added to 12 liters of an 8% glycerin solution to result in a solution containing 16% glycerin.
To determine the amount of glycerin that should be added to 12 liters of an 8% glycerin solution to result in a solution containing 16% glycerin, we can use the formula for dilution:
C1V1 = C2V2, where C is the concentration, and V is the volume.In this case, C1 is the original concentration of glycerin (8%), V1 is the original volume of the solution (12 liters), C2 is the desired concentration of glycerin (16%), and V2 is the final volume of the solution.
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What is the generic name of gabapentin?
The generic name of the gabapentin is the Neurontin. The Gabapentin is used to treat the epilepsy.
The generic name of the gabapentin and It is also taken for the nerve pain, and which can be caused by the different conditions, it also diabetes and the shingles. The Nerve pain can also be happen after the injury. The Gabapentin is generally used to treat the some types of the nerve pain but it is also classified as the anticonvulsant medicine, but it is not used as the opioid or the painkiller.
Thus, the Neurontin is the generic name of the gabapentin.
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rank the following compounds from weakest to strongest intermolecular force:
H2O, CHF3, Cl2, CCl4, HF, CH3F
Dipole-dipole interaction pales in comparison to the strength of the polar covalent bond. Whereas the latter is known as an intermolecular attraction.
What does a covalent bond's shared pair represent?
Equal shares of electrons from the two involved atoms result in the formation of a covalent bond. This sort of bonding's electron pair is known as the shared pair or binding pair.
Why is it called covalent?
See Covalent for other uses (disambiguation). A chemical bond known as a covalent bond entails the exchange of two electrons between atoms. When atoms share electrons, a stable equilibrium of the repellent and attractive forces between them is known as bond formation. These pairs of electrons are also known as pairs that are shared or bonding pairs.
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What is the percent composition of hydrogen In hydrosulfuric acid? [also the rest of the questions if you’re up for the challenge]
Select the correct answer. Which of the following is true for all exergonic reactions?
A) The products have more total energy than the reactants.
B) The reactions proceed with a net release of free energy.
C) The reactions are always rapid.
D) The reactions only occur in certain organelles called exergonomes.
Exergonic reactions are reactions that release energy, typically in the form of heat, and have a negative Gibbs free energy change (ΔG). Option B) (The reactions proceed with a net release of free energy) is the right answer.
This means that the free energy of the products is lower than the free energy of the reactants, and the difference is released as usable energy. The net release of free energy makes exergonic reactions spontaneous and capable of doing work, such as driving endergonic reactions or powering cellular processes.
Option A is incorrect because the products of exergonic reactions have less total energy than the reactants. Option C is incorrect because the rate of exergonic reactions varies and can be slow or fast depending on the reaction. Option D is incorrect because there is no such thing as an "exergame."
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what is the boiling point of h2?
The boiling point of the H₂ is the 20 K 0r the –423 ºF; or the –253 ºC .
The boiling point is defined as the temperature of the liquid at which its vapor pressure will be equal to the pressure of the gas or the above it. The normal boiling point of the liquid is the temperature at which the vapor pressure is equal to the one atmosphere or the 760 torr. The boiling point of the substance is the temperature when the vapor pressure of the liquid is equals to the pressure of the surrounding the liquid and the liquid will changes into the vapor.
Thus in the kelvin the boiling point of the H₂ is the 20 K.
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how do you understand equivalence point and find the equivalence point from the two titration curves? you may remember endpoint from your previous acid-base titration experiment. do you have an endpoint in this titration? how do you distinguish endpoint and equivalence point?
In acid-base titration, the equivalence point is the point at which the acid and base are stoichiometrically balanced and neutralize each other.
At this point, the moles of acid are equivalent to the moles of base, and the solution is neither acidic nor basic. The equivalence point is often identified by a sudden and sharp change in pH.
Unlike the endpoint, which is determined using indicators, the equivalence point is calculated mathematically based on the stoichiometry of the reaction. However, the two points may not always coincide due to the nature of the indicators or the presence of impurities in the sample.
To find the equivalence point, one can plot the titration curve by plotting the pH of the solution against the volume of titrant added. The equivalence point is the midpoint of the steepest part of the curve, where the pH changes most rapidly. It is essential to distinguish between the endpoint and the equivalence point as they mark different stages in the titration process and can affect the accuracy of the results.
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Identify each category of substance as soluble or insoluble in water.Most carbonate and phosphate salts blankMost halide (Br-, Cl-, and I-) salts blankMost silver salts blanksalts of group 1 elements blankMost nitrate salts blank
The majority of carbonate and phosphate salts are water insoluble. The majority of halide salts (Br-, Cl-, and I-) are water soluble. The majority of silver salts are water insoluble. Group 1 element salts are water soluble. The majority of nitrate salts are water soluble.
Why is CO3 called carbonate?Carbonate is the term given to the material with the chemical formula CO3. Carbonate has an electric charge of 2 and is composed of 1 carbon atom and 3 oxygen atoms. Due to its negative charge, carbonate contains 2 more electrons than protons in each of its individual ions. The organic molecule with the carbonate group C(O-)2, known as a carbonate ester, may also be referred to as a carbonate.
Is carbonate a base or acid?A moderately powerful base is carbonates. Since the carbonate anion can take an ion of hydrogen from water, aqueous solutions are basic. CO32 + H2O -> HCO3 + OH Gaseous carbon dioxide, water, and metal salts are created when carbonates and acids interact. Infusing carbon dioxide gas under pressure into water results in carbonated water. This creates sparkling water, club soda, soda water, seltzer water, and fizzy water, which are all terms for the frothy beverage that is the result. Unless it's seltzer water, salt is typically added to carbonated fluids to enhance flavor.
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What is Transmission of light?
Answer:
When light hits an object that is transparent or translucent and light can penetrate the material to travel all the way through.
Explanation:
when light transmission happens it can be scattered or refracted. Scattering happens when light hits an atom and is sent in all directions.
You make a solution of a nonvolatile solute with a liquid solvent. Indicate whether each of the following statements is true or false. (a) The freezing point of the solution is higher than that of the pure solvent. (b) The freezing point of the solution is lower than that of the pure solvent. (C) The boiling point of the solution is higher than that of pure solvent. (d) The boiling point of the solution is lower than that of the pure solvent.
The solution's freezing point is higher than the solvent's pure freezing point. The solution has a boiling point that is greater than a pure solvent.
What happens when you add a nonvolatile solute to a liquid?The boiling point of a solvent increases and the vapour pressure decreases when a nonvolatile solute is added. A substance that does not readily evaporate is referred to as a nonvolatile solute.
When non-volatile substances are added to a solvent, the vapour pressure is reduced, and the solute particles have an impact on how pure solvent crystals form. According to numerous studies, the amount of solutes dissolved in the solvent directly correlates to the drop in freezing point. The vapour pressure of a non-volatile solute drops when it is dissolved in a volatile solvent.
Therefore, the correct answer is option
(a) The freezing point of the solution is higher than that of the pure solvent.
(C) The boiling point of the solution is higher than that of pure solvent.
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Atoms can be "cooled" to incredibly low temperatures by letting them interact with a laser beam. Various novel quantum phenomena appear at these temperatures. What is the rms speed of cesium atoms that have been cooled to a temperature of 120 nKnK ? Express your answer to two significant figures and include the appropriate units.
In light of this, the rms speed of cesium atoms at a temperature of 120 nK is roughly 107 m/s.
Why are atoms called?Because it was formerly believed that atoms were the smallest objects in the world and could not be separated, the word "atom" is derived from the Greek word for "indivisible." Chemistry's fundamental building block is an atom. It is the tiniest portion of matter within which charged particles could be released
How atoms are formed?Protons, neutrons, & electrons surround the central nucleus of an atom, which is what makes up an atom. The fission process, which divides uranium into smaller atoms, produces new atoms. The Big Bang and Supernova occurrences demonstrate the massive amount of atoms that were created. As the universe grew larger and cooled, events slowed down. It took 380,000 years for the first atoms to form after electrons were locked in orbits around nuclei. These mostly consisted of helium and hydrogen, which continue to be the universe's two most plentiful components.
The following formula can be used to determine the root mean square (rms) speed of cesium atoms that have been cooled to a temperature of 120 nK:
v = sqrt((3kT)/m)
where m is the mass of a cesium atom, T is the temperature in Kelvin, k is the Boltzmann constant, and v is the rms speed.
The mass of a cesium atom is approximately 132.91 atomic mass units (amu), which is equivalent to 2.2067 x 10^-25 kg.
When we change the values, we obtain:
v = sqrt((3 * 1.38 x 10^-23 J/K * 120 x 10^-9 K) / 2.2067 x 10^-25 kg)
v = 107 m/s
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Which of the following is an advantage of visible light space-telescopes have over ground-based telescopes?
Group of answer choices
They are cheaper
They have a larger telescope diameter
They are easier to repair
They don't have to deal with the Earth's atmosphere
Answer:
They don't have to deal with the Earth's atmosphere
Explanation:
Space telescopes have the advantage of being above the blurring effects of the Earth's atmosphere
Which metal oxide will be reduced by heating with iron?
A calcium oxide
B lead oxide
C magnesium oxide
D zinc oxide
Answer:
calcium oxide
Explanation:
Correct option is A)
Magnesium metal is an alkaline earth metal. The tendency of these metals is to lose electron. They lose electron and form oxide. Now, they are stable hence it is very difficult for them to again gain that electron. Hence, they are not reduced by normal reducing agents.
how many members of the house of representatives are up for re-election each election cycle?
All 435 members of the United States House of Representatives are up for re-election in each election cycle, which occurs every two years.
This means that every seat in the House of Representatives is up for grabs in the regular congressional elections that are held in November of even-numbered years. Each state is divided into congressional districts based on population, and each district elects one representative to serve in the House.
The terms of representatives are two years long, so all representatives must run for re-election every two years if they wish to continue serving in the House.
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If 201 g Fe2O3 is reacted with excess CO, what mass of CO2 will be produced? Fe2O3(s) + 3CO(g) → 3CO2(g) + 2Fe(s)
We can start by using stoichiometry to find the amount of CO2 produced from the given amount of Fe2O3. The balanced chemical equation is:
Fe2O3(s) + 3CO(g) → 3CO2(g) + 2Fe(s)
What is Stoichiometry?
Stoichiometry is the branch of chemistry that deals with the calculation of the quantitative relationships between reactants and products in chemical reactions. It is based on the We can start by using stoichiometry to find the amount of CO2 produced from the given amount of Fe2O3. The balanced chemical equation is:
Fe2O3(s) + 3CO(g) → 3CO2(g) + 2Fe(s)
From the equation, we can see that 1 mole of Fe2O3 reacts with 3 moles of CO to produce 3 moles of CO2. We can use this information to set up a conversion factor to calculate the amount of CO2 produced:
1 mol Fe2O3 / 159.69 g Fe2O3 x 3 mol CO2 / 1 mol Fe2O3 x 28.01 g CO2 / 1 mol CO2 = 168.76 g CO2
So, if 201 g Fe2O3 is reacted with excess CO, 168.76 g CO2 will be produced.
, which states that in a chemical reaction, the total mass of the products must be equal to the total mass of the reactants.
In stoichiometry, balanced chemical equations are used to relate the moles of reactants and products in a chemical reaction. By knowing the amount of one substance, it is possible to calculate the amount of another substance in the reaction, using the stoichiometric coefficients in the balanced equation as conversion factors.
Fe2O3(s) + 3CO(g) → 3CO2(g) + 2Fe(s)
From the equation, we can see that 1 mole of Fe2O3 reacts with 3 moles of CO to produce 3 moles of CO2. We can use this information to set up a conversion factor to calculate the amount of CO2 produced:
1 mol Fe2O3 / 159.69 g Fe2O3 x 3 mol CO2 / 1 mol Fe2O3 x 28.01 g CO2 / 1 mol CO2 = 168.76 g CO2
So, if 201 g Fe2O3 is reacted with excess CO, 168.76 g CO2 will be produced.
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When combining a strong acid with water to dilute it, you should add the acid to the water.
Is this statement true or false?
The given statement exists false. Strong acids react dangerously when water is introduced, creating heat in the process.
When combining a strong acid with water to dilute it you should add the acid to the water?It is exceedingly dangerous for heat to be produced when water is introduced to a strong acid. As a result, adding the acid slowly to the water and then stirring it frequently is the best way to dilute a strong acid.
Never add water to acid; always the other way around. Acid might splash up and splatter in the absence of that. It matters whether acid is added to water first or water is added to acid when mixing strong acids and water. Never mix acid with water; instead, always add acid to water.
It's crucial to add acid to water rather than the other way around when mixing acid and water. Because of the intense exothermic reaction between acid and water, which releases heat and occasionally causes the liquid to boil, this occurs.
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What are the electron and molecular geometry of BrF5 ?
The electron geometry of BrF₅ is octahedral and the molecular geometry is square pyramidal.
To determine the electron and molecular geometry of BrF₅ , we can use the VSEPR theory. The VSEPR theory predicts the arrangement of electron pairs around a central atom and the resulting molecular geometry.
1. Determine the number of valence electrons for BrF5. Br has 7 valence electrons and each F has 7 valence electrons, so the total number of valence electrons is 7 + (5 x 7) = 42.
2. Draw the Lewis structure for BrF₅ . Place the Br atom in the center and the F atoms around it. Each F atom will form a single bond with the Br atom, using 2 electrons for each bond. This leaves 22 valence electrons, which will be used to form lone pairs around the F atoms.
3. Determine the electron geometry. The Br atom is surrounded by 5 bonding electron pairs and 1 lone pair, giving a total of 6 electron pairs. The electron geometry for 6 electron pairs is octahedral.
4. Determine the molecular geometry. The Br atom is surrounded by 5 bonding electron pairs and 1 lone pair, giving a total of 6 electron pairs. The molecular geometry for 5 bonding pairs and 1 lone pair is square pyramidal.
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What is Ammonium phosphate molar mass?
The molar mass of Ammonium phosphate is 149.08674 g/mol.
Ammonium phosphate is a chemical compound with the formula (NH₄)₃PO₄. It is made up of three ammonium ions (NH⁴⁺) and one phosphate ion (PO⁴⁻).
To find the molar mass of Ammonium phosphate, we need to add the molar masses of all the atoms in the compound. The molar mass of an atom is the mass of one mole of that atom.
The molar mass of Ammonium phosphate is:
3 x (molar mass of NH⁴⁺) + (molar mass of PO⁴⁻)
= 3 x (14.007 + 4 x 1.008) + (30.974 + 4 x 15.999)
= 3 x 18.039 + 94.971
= 54.117 + 94.971
= 149.08674 g/mol
Therefore, the molar mass of Ammonium phosphate is 149.08674 g/mol.
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What is the ph of a solution that contains 11.7g of nacl for every 200 ml of solution?
A solution with [H+] 107 or a pH higher than 7 would be basic because it lacks H+ ions. Diluted solutions have a pH range of 0 (extremely acidic; 1 mole ( H+ ions per litre) to 14. (very alkaline).
How acidic is 100% vinegar?The finest vinegar for cleaning homes is white distilled vinegar, which normally has a pH of 2.5. Anything sugar, such as fruit, can be used to make vinegar, which is referred to as "sour wine" in French.
What does pH stand for?pH stands for "Potential of Hydrogen" in its full form. The negatives logarithm of the concentration of H+ ions is known as pH. As a result, the meaning of pH is defined as the strength or power of hydrogen.
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Why is the Diels Alder reaction reversible at high temperatures?
As starting materials have a higher entropy than products, all Diels-Alder processes may be reverted to initial diene and dienophile at sufficiently high temperatures.
Cycloaddition reversibility is one of the factors that contribute to endo-selectivity loss. Cycloreversion reactions are particularly common in aromatic dienes (such as furan and anthracene). Retro-Diels-Alder reactions can be utilised to create reactive olefins or other -bonds utilising flash vacuum pyrolysis.
For this purpose, anthracene, 9,10-dimethylanthracene, cyclopentadiene, and dimethylfulvene seem to be particularly suitable. If heated enough, the product of a Diels-Alder reaction can undergo a reverse reaction that recharges the initial konnect and generates a set (which both happen to be cyclopentadiene in this case). The backward (or "retro") reaction seems to be the Diels-Alder reaction.
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Which best describes the conditions in the intertidal zone?
A.few predators, low light, and temperature
B. high water pressure and limitedsunlight
C.brackish water and high amounts of nutrients
D.an increase in the percolation of water above the aquifer
What is an example of a mixture of elements?
The examples of the mixture of the elements is the Brass, it is the example of a mixture of the two elements that is the copper and the zinc.
The Brass is the example of the mixture of the two elements the one is copper and the other is zinc. The brass can contain the little as the 10%, or as much as the 45%, zinc. The difference in between the compounds and the mixtures of the elements are the ease that with which the elements will be separated.
The mixture of the elements are consists of the two or the more different elements and the compounds that physically intermingled.
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What is refractive index of methanol?
The refractive index of methanol is 1.329.
Refractive index is a measure of how much a substance bends light. The higher the refractive index, the more the substance bends light.
Methanol, a colorless liquid with the formula CH₃OH, has a refractive index of 1.329.
This means that light passing through methanol will be bent slightly more than it would be if it were passing through water, which has a refractive index of 1.333.
The refractive index of a substance is important in many fields, including optics, chemistry, and physics. It is used to determine the optical properties of substances, and can be used to design lenses and other optical devices.
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Why is carbon not a metal or nonmetal?
Carbon is a non-metal because, in its elemental state, it cannot form a metallic bond and conduct electricity.
Carbon is a non-metal since it lacks characteristics of metals including ductility, lustre, malleability, electrical conductivity, etc. Moreover, it creates covalent bonds. Carbon is a non-metallic, solid element. Diamond and graphite are two extremely distinct types of pure carbon that may occur.
A metal is a substance that has a shiny look when freshly processed, polished, or shattered, and conducts electricity and heat rather effectively. Carbon lacks the malleability and ductility that are generally seen in metals, which may be hammered into thin sheets or dragged into wires.
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does freezing involve the creation of a crystal structure
The majority of liquids freeze through crystallisation, which is the development of crystalline solid from the homogeneous liquid.
Does freezing create a crystal structure?Because the oxygen atom draws a greater proportion of electrons, the water molecule is slightly positive on one side and slightly negative on the other. The hexagonal crystal lattice is formed when bipolar molecules in water freeze and are drawn near one another.
When a liquid's molecules slow down enough to attract one another and organise themselves into stable places as a solid, freezing happens. Salt water is cooled to create pure ice crystals during the freezing process, also known as crystallisation.
When atoms, molecules, or ions are grouped in a highly ordered microscopic structure, the result is a substance known as a crystal. Chemical bonds such as metallic bonds, ionic bonds, covalent bonds, van der Waals bonds, and others serve as the interatomic forces that hold these components together.
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the oxidation number of the manganese atom in mno₄⁻ is
The oxidation number of the manganese atom in MnO₄⁻ is 7.Oxidation number can be negative,zero or positive.
Oxidation number in basic terms can be depicted as the number that is distributed to components in a synthetic blend. The oxidation number is fundamentally the include of electrons that iotas in a particle can share, lose or acquire while framing substance securities with different molecules of an alternate component.
Oxidation number is likewise alluded to as oxidation state. Nonetheless, some of the time these terms can have an alternate importance relying upon regardless of whether we are thinking about the electronegativity of the atoms. The oxidation number term is utilized often in coordination science.
So,oxidation number of Mn in MnO₄⁻=x+(-2) ˣ 4 =-1
=>x-8=-1
=>x=-1+8
=>x=7
Hence,oxidation number of Mn in MnO₄⁻ is 7.
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Mercury has a very high surface tension. Would capillary action occur if you insert a thin tube into a pool of mercury? Assume the cohesive forces in mercury are greater than the adhesive forces with the tube.A) Yes, capillary action will draw the mercury up into the tube.B) No, capillary action only occurs if cohesive forces are less than adhesive forces.C) Yes, capillary action will draw the mercury up the outside of the tube.D) Yes, capillary action will pull the mercury down in the tube.
The correct answer is B) No, capillary action only occurs if cohesive forces are less than adhesive forces. Capillary action is a result of the interplay between cohesive forces and adhesive forces.
Cohesive forces are the attractive forces between molecules of the same substance, while adhesive forces are the attractive forces between molecules of different substances. For capillary action to occur, the adhesive forces between the tube and the liquid must be greater than the cohesive forces within the liquid. However, in the case of mercury, the cohesive forces are much greater than the adhesive forces, so capillary action would not occur. Therefore, inserting a thin tube into a pool of mercury would not cause the mercury to be drawn up into the tube.
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