Answer: Quick Meaning and Difference
Explanation: As an electron moves from one level of energy to another within an atom or artificial atom, it appears discontinuous as it "jumps" from one level of energy to another. It is a form of deexcitation, atomic transition or quantum leap, this occurs when electrons are excited or de-excited. while In an atom or artificial atom, an electron transitions from one energy level to another. The quantum jump involves abruptly switching between quantum states or energy levels within a quantum system. A transition from one energy level to another occurs when the system absorbs energy; a transition from one energy level to another occurs when the system loses energy. I'm not sure quantum jumps even exist at the moment. A quantum leap has been the subject of controversy among physicists for over a century. The answer is now in, and everyone was a little bit right. Basically, quantum leaps or jumps are energy level jumps made by orbiting electrons in an atom. Atoms create photons when electrons move to a lower energy level and absorb them when electrons move to a higher energy level or leave the atom (ionization).
There is zero plagirism in this entire paragraph so feel free to copy and paste this into whatever assignment you like.
g a vanadium electrode is oxidized electrically. if the mass of the electrode decreases by 114 mg during the passage of 650 coulombs, what is the oxidation state of the vanadium product?
A vanadium electrode is oxidized electrically. if the mass of the electrode decreases by 114 mg during the passage of 650 coulombs, the oxidation state of the vanadium product is +3.
Given that :
mass = 114 mg = 0.114 g
molar mass = 51 g/mol
charge = 650 C
From the Faraday's law of 53 electrolysis :
Electrochemical equivalent = mass / charge
= 0.114 g / 650 C
= 0.00017 g/C
Equivalent weight = atomic mass / valency = Z × 96485
51 / valency = 0.00017 × 96485
valency = + 3
Thus, the oxidation state of vanadium is +3.
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identify how the chromatogram will change if the separation factor () is constant, but the plate number () increases.
Intensity Time: Change the chromatogram to show that N, the number of hypothetical plates, is rising while y, the unadjusted relative retention, remains constant.
What is chromatogram?In order to identify substances and ascertain their relative quantities within the mixture, we can use a chromatogram, which is a pictorial representation of our separated eluents. Chromatograms. These are charts of the eluents' concentration vs time as they exit the stationary phase. Chemical analysis uses chromatography, a laboratory technique, to separate a mixture into its component parts. The stationary phase is a material that is fixed in a system, and the mobile phase, which is a liquid solvent, dissolves the mixture and carries it through that system.
What are the colours of chromatogram and its main purpose?The various pigments are visible in the chromatogram. Carotene appears brilliant yellow, chlorophyll an is blue-green, chlorophyll b is yellow-green, and xanthophyll is pale yellow-green. (Only two of these pigments may be visible.)
Chromatography's goal is to separate the different components of a mixture. Applications range from a simple examination of a compound's purity to a thorough dissection of its components.
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3. which of the following is not true?
A. In Polar Reaction a, nucleophile reacts an elctrophile
B. Carboactions are elcrophiles
C. Carboanions are nucleophile
D. A Half-headed curver arrow shows the movemant of an electron pair 4. Which of the following statements is true? A. The size of the activiation energy tells us about the reaction mecanism
B. The size of the activiation energy tells us about the reaction rate
C. A show reaction has low reaction energy
D. A fast reaction has large reaction energy
Which of the following statements regarding electrophiles is untrue? According to ideas about acid-base reactions, electrophiles are Lewis acids rather than Lewis bases because they receive electrons.
Because their partial positive charge is masked by polar bonding and/or resonance, electrophiles can be hard to spot. We thus come to the conclusion that the proper understanding of an electrophile is that it may exist as a positively charged or neutral species and that it can establish a bond by receiving a pair of electrons from a nucleophile. So, the appropriate choice is BF3 is an electron-poor substance. It lacks a spare pair of electrons that it could provide. It is therefore not nucleophilic.
When two bound atoms separate, one takes more of the shared electrons than the other, and this causes a polar reaction.
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what is the average kinetic energy of 4.51 mol of a gas of molar mass 33.8 g/mol and rms speed 866 m/s
Answer:
A big load of icecream/ loaded cake.
Explanation:
What kind of intermolecular forces act between a chlorine Cl2 molecule and an argon atom? 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.
Dispersion forces are the intermolecular force. The sole sort of intermolecular force that acts between non-polar molecules is called a dispersion force.
Examples of such molecules are hydrogen (H2), chlorine (Cl2), carbon dioxide (CO2), dinitrogen tetroxide (N2O4), and methane (CH4). Thus, London dispersion forces are the sole intermolecular forces. Due to the non-polar character of these two molecules, we may state that helium and CCL-4 are only weakly bound together by the London dispersion force. Chlorine is a diatomic molecule with equal electronegativity in each of its atoms, which indicates that the molecule is non-polar. Only London dispersion forces are present in non-polar molecules. Therefore, Cl2 Cl 2 has London dispersion forces.
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Which of the following statements correctly describe bonding and intermolecular forces?
Intermolecular forces involve partial or small charges that are far apart and are relatively weak
Bonding forces occur within the nucleus of the atom and are therefore strong
Covalent bonds are type of intermolecular force since they are found in molecules.
Bonding forces are generally much stronger than intermolecular forces
For molecular substance, the strength of the Intermolecular forces determines the physical properties of its phases
The correct statements are thus: bonding forces are typically much stronger than intermolecular forces, intermolecular forces involve partial or small charges that are far apart and are relatively weak, and for molecular substances, the strength of the intermolecular forces determines the physical properties of its phases.
What does bonding mean in chemistry and its types?When two or more atoms, molecules, and ions join together chemically to form a compound, this process is known as chemical bonding. These chemical bonds hold the atoms in the resulting molecule together.
The four main types of bonding—ionic, covalent, metallic, and molecular—are discussed in this section. Ice is a different kind of solid that plays a significant role in a few crystals.
How bonding is formed and its purpose?To form bonds, atoms exchange or trade their valence electrons. The electrons in an atom's outermost energy level known as valence electrons have the potential to interact chemically. All chemical bonds are built on valence electrons.
The simplest explanation is that atoms are attempting to achieve the most stable (lowest-energy) state possible. Many atoms become stable when they satisfy the octet rule or have their valence shell completely filled with electrons.
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6. A proteolytic enzyme cleaves bonds. O peptide O disulfide O double O None of the above
The correct option is A.
A proteolytic enzyme cleaves bonds that are peptides.
What is a proteolytic enzyme?
Proteolytic enzymes are enzymes that damage protein. These enzymes are formed by animals, plants, fungi, and bacteria. Proteolytic enzymes damage proteins in the body or on the skin. This might help with digestion or with the damage of proteins mixed in swelling and pain.
The correct option is A.
A proteolytic enzyme cleaves bonds that are peptides.
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In double replacement reactions, why will two metals not combine with each other when products are formed?
A double replacement equation will not result in a reaction if both products are soluble.
Double replacement Reaction: What is it?When two ionic compounds exchange ions to create two new ionic compounds, this is known as a double replacement reaction. An illustration of this kind of answer is the following: AD + CB + CD + AB.
Since salt is an insoluble substance that won't dissolve in water, we use the symbol (s) for solid. If there had been no precipitate formation, the silver, fluoride, potassium, and chloride ions would have in fact relocated to a different site, but they would still be floating around as ions. In this case, nothing happens.
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1. What is the strongest intermolecular force present for each of the following molecules?
a. hydrogen (H2)________
b. carbon monoxide (CO)________
c. silicon tetrafluoride (SiF4)______
d. nitrogen tribromide (NBr3)_______
e. water (H2O)_______
f. acetone (CH2O)______
g. methane (CH4)_______
h. H benzene (C6H6)______
i. ammonia (NH3)_________
j. methanol (CH3OH)________
The strongest intermolecular forces present between these molecules includes London dispersion forces hydrogen bonding and dipole dipole forces.
Intermolecular forces are the force that are responsible for keeping the molecule is stable.
There are Several kind of intermolecular forces like dipole-dipole forces, London-dispersion forces, hydrogen-bonding etc.
In the given compound the strongest intermolecular forces present for each of the molecule is,
Hydrogen (H) London dispersion forces
Carbon monoxide (CO) London dispersion forces
Silicon Tetrafluoride (SiF₄) London dispersion forces
Nitrogen tribromide(NBr₃) dipole dipole forces
Water (H₂O) hydrogen bonding
Acetone (CH₂O) dipole dipole forces
Methane (CH₄) London dispersion forces
Benzene (C₆H₆) London dispersion forces
Ammonia (NH₃) hydrogen bonding
Methanol (CH₃OH) hydrogen bonding.
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How would you draw the product of the hydration of 2-butene?
The product of the hydration of 2-butene is a mixture of two compounds, 2-butanol and 2-butanone (also known as methyl ethyl ketone). To draw the product of the hydration of 2-butene, one would draw the structural formulas of both compounds side by side.
The structural formula for 2-butanol is CH3CH(OH)CH2CH3, and the structural formula for 2-butanone is CH3C(O)CH2CH3.
The hydration product of 2-butene leads to the formation of 2-butanol. 2-butanol is a four-carbon saturated alcohol compound with a hydroxyl group attached to the second carbon atom of the butane chain.
2 draw2-butanol. First draw a saturated carbon chain with four carbon atoms and an (-OH) group attached to the second carbon atom.
Follow Markovnikov's Law when adding chiral reagents. According to this rule, the negative portion of the asymmetric reagent is added to the less or more substituted carbon atom of the double bond, and the positive portion is added to the unsubstituted portion of the double bond. It will be added. The addition of HBr to alkenes in the presence of peroxide is an example of an electrophilic addition reaction. Markovnikov's law is not followed during the addition of electrophiles to unsymmetrical alkenes. Chemically, alcohols are hydroxy derivatives of alkanes.
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What the frequency of an electromagnetic radiation with wavelength of 4. 257 x 10^-9 m what type of EMR i thi
the wavelength of an electromagnetic wave is 4. 257 x 10-9 m, and its frequency is 0.7047 * 10¹⁷ s⁻¹
λ=4.257nm=4.257x 10^-9 m [∵1nm=10⁻⁹m]
c=3×10⁸ m/sec
c=vλ
[tex]v=\frac{c}{λ}[/tex]
=3*10⁸/4.257x 10⁻⁹
=0.7047 * 10¹⁷ s⁻¹
Physically speaking, electromagnetic radiation (EMR) is made up of electromagnetic (EM) field waves that travel through space carrying electromagnetic radiant energy. It consists of microwaves, X-rays, gamma rays, infrared, visible light, and other electromagnetic waves. A spectrum of electromagnetic wave includes each of these waves.
Traditional electromagnetic radiation is made up of electromagnetic waves, which are coordinated oscillations of the electric and magnetic fields. A periodic shift in the electric or magnetic field is what causes electromagnetic radiation or waves to be produced. Different electromagnetic spectrum wavelengths are created depending on the power generated and how this periodic shift happens. Electromagnetic waves move at the speed of light in a vacuum, typically abbreviated as c. The two fields oscillate in a manner that is perpendicular to one another in homogeneous, isotropic media.
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How many moles of PbCl2 are
produced when 16 moles AlCl3 are
consumed?
3Pb(NO3)2 + 2AICI3 → 3PbCl2 + 2Al(NO3)3
?] mol PbCl₂
24 moles of [tex]PbCl_2[/tex] are created when 16 moles of [tex]AlCl_3[/tex] are used up.
According to the balanced chemical equation, 2 moles of [tex]AlCl_3[/tex] are required to produce 3 moles of [tex]PbCl_2[/tex]. Therefore, if 16 moles of [tex]AlCl_3[/tex] are consumed, the amount of [tex]PbCl_2[/tex] produced would be:
(16 mol [tex]AlCl_3[/tex]) x (3 mol [tex]PbCl_2[/tex] / 2 mol [tex]AlCl_3[/tex]) = 24 mol [tex]PbCl_2[/tex]
Therefore, 24 moles of [tex]PbCl_2[/tex] are produced when 16 moles of [tex]AlCl_3[/tex] are consumed.
Using the balanced chemical equation, we can determine the amount of [tex]PbCl_2[/tex] produced when 16 moles of [tex]AlCl_3[/tex] are consumed:
3Pb(NO3)2 + 2 [tex]AlCl_3[/tex] → 3PbCl2 + 2Al(NO3)3
From the equation, we see that 2 moles of AlCl3 produce 3 moles of [tex]PbCl_2[/tex]. To find the amount of [tex]PbCl_2[/tex] produced by 16 moles of [tex]AlCl_3[/tex], set up a proportion:
(3 moles [tex]PbCl_2[/tex]) / (2 moles [tex]AlCl_3[/tex]) = (x moles [tex]PbCl_2[/tex]) / (16 moles [tex]AlCl_3[/tex])
Cross-multiply and solve for x:
(3 moles [tex]PbCl_2[/tex])(16 moles [tex]AlCl_3[/tex]) = (2 moles [tex]AlCl_3[/tex])(x moles [tex]PbCl_2[/tex])
48 moles [tex]PbCl_2[/tex] = 32 moles [tex]AlCl_3[/tex] = 24 moles PbCl2
So, when 16 moles of [tex]AlCl_3[/tex] are consumed, 24 moles of [tex]PbCl_2[/tex] are produced.
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study smarter is a transition allowed in sodium? if so, what is its wavelength (in nm)? if not, why not?
Here, sodium is allowed to shift from 4p to 4s, and its wavelength is 2.214 m. A wave's wavelength is described as the characteristic that measures the separation between adjacent spots.
Calculations are made between the two succeeding waves. The Greek letter lambda () is used to represent it. Thus, the wavelength is defined as the separation between one wave's crest or trough and the following wave. The chemical element sodium has the atomic number 11 and the letter Na, which derives from the Latin natrium. It is a malleable, silvery-white, and extremely reactive metal. In group 1 of the periodic table, sodium is an alkali metal.
a change from 4p to 4s
As l = 1 for a 4p state and I = 0 for a 4s state, this transition is permitted because l = 1 - 0 = 1
4p (Ei) = 3.75 eV energy
Energy of 4s (E2) = 3.19 eV,
with = 1240 eV nm / (E2 - E1) = 2214 nm 2.214 m.
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The complete question is-
Is a 4p S 4s transition allowed in sodium? If so, what is its wavelength? If not, why not?
What is the percent ionization of a 2M solution of acetic acid at 25 degree C? 0.6 percentage 0.3 percentage 0.0036 percentage 0.0018 percentage
The percent ionization solution of acetic acid at 25°C is 0.3 %. The answer is B.
At 25°C, the dissociation constant (Ka) for acetic acid is 1.75 × 10⁻⁵. The ionization reaction for acetic acid
CH₃COOH → CH₃COO⁻ + H⁺
initial concentration 2 - -
changing concentration - x + x + x
equilibrium concentration 2-x x x
[tex]Ka \:=\: \frac{[CH_3COO^-] \: [H^+]}{[CH_3COOH]}[/tex]
[tex]Ka \:=\: \frac{x \: x}{2-x}[/tex]
[tex]Ka \:=\: \frac{x^2}{2-x}[/tex]
Ka = x² ÷ (2-x)
1.75 × 10⁻⁵ = x² ÷ (2-x)
The magnitude of x is so small that x can be negligible.
1.75 × 10⁻⁵ = x² ÷ 2
1.75 × 10⁻⁵ × 2 = x²
x² = 3.50 × 10⁻⁵
[tex]x = \sqrt{3.50 \times 10^{- 5}}[/tex]
x = 5.92 × 10⁻³ M
The percentage ionization = (x ÷ 2) × 100%
= (5.92 × 10⁻³ ÷ 2) × 100%
= 2.96 × 10⁻³ × 100%
= 0.296%
= 0.3%
B
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in double replacement reactions, why will two metals not combine with each other when products are formed?
When pieces of two ionic compounds switch places to create two new compounds, it is called a double replacement reaction also known as a double displacement, exchange, or metathesis reaction
what is The definition of double displacement reaction?One in which one reactant is only partially replaced by another is referred to as a twofold displacement reaction.
A list of double reactions is provided below:
AB = CD + CB + CD + AD
A twofold replacement process involves exchanging the same ions from two reactant ionic bonds for two new product compounds.
Two reactants transfer cations or anions to create two new products in a double replacement reaction.
Metathesis reactions double and displacement reactions are additional names for dual replace procedures.
Double replacement reactions include, but are not limited to, precipitation, gas production, and neutralization.
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draw the major product for each of the following reactions
Major product: The product that is produced in the greatest amount in a chemical reaction.
What are chemical reactions?
A chemical reaction is the process of chemically transforming a set of chemicals into another chemical. Classically, chemical reactions involve changes that affect only the positions of electrons in forming and breaking chemical bonds between atoms, without changes in the nucleus (no changes in the elements present), often , which can be written as a chemical equation. Nuclear chemistry is a subfield of chemistry that deals with chemical reactions of unstable radioactive elements in which both electronic and nuclear changes can occur.
The substances that first participate in a chemical reaction are called reactants or reagents. A chemical reaction is usually characterized by a chemical change, usually resulting in one or more products with different properties than the reactants. Reactions often consist of a series of individual steps, so-called elementary reactions, and information about the exact process is part of the reaction mechanism. Chemical reactions are described using chemical formulas that symbolically represent starting materials, final products, sometimes intermediates, and reaction conditions.
Therefore, Major product: The product that is produced in the greatest amount in a chemical reaction.
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Complete question is: What is a major product? draw the major product for each of the following reactions?
Draw the products of each reaction .
In acidic medium, nucleophile attacks at more substituted carbon. In basic medium, nucleophile attacks at less hindered side i.e nucleophile attacks at less substituted carbon.
a substance that reacts by supplying two electrons to create a new covalent bond (i.e. a Lewis base). Bronsted-Lowry bases, or simply bases, are nucleophile that share an electron pair with a proton. In an SN2 reaction, the hydrogen ion acts as the nucleophile. The charge of a nucleophile might be neutral or negative. The nucleophile must be a good Lewis base in all scenarios, which means it must be willing to share electrons.
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what do the brackets in the following equation represent? [h3o+] × [oh-] = kw
The brackets in the following equation [h3o+] × [oh-] = kw represent the molarity of the compound inside them.
What is Molarity?
This is a term which is used to express the concentration of a substance and it is referred to as the amount of a substance in a certain volume of solution. It is also usually expressed as the mass per unit volume of a substance in the form of moles.
On the other hand , kw is referred to as a measure of the strength of an acid or base and is also the equilibrium constant for the dissociation reaction of water.
The equation is given as [h3o+] × [oh-] = kw in which the bracket represent the molarity of the compound inside them as it is an important factor in how a reaction occurs which is therefore the reason why it was chosen as the correct choice.
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this figure is an example of a(n) _____.
The picture depicts an organic complex made up of a molecule of glycerol and serves as an illustration of a saturated fat.
Explain what a molecule is?A molecule is the simplest unit of a material that keeps its content and properties. It is made up of two or maybe more atoms that are joined together by chemical bonds. Chemistry is built on molecules. The component symbol and a prefix indicating the amount of atoms are used to identify molecules.
Is oxygen an atom or a molecule?In nature, oxygen exists as a molecule. To create dioxygen, or O2, two oxygen atoms must make a solid double bond with one another. Typically, oxygen exists as a molecule. It has the name dioxygen.
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Three examples of fields are gravitational,?
Magnetic, electric, and gravitational fields are a few examples of the forces that pull you toward the center of the earth.
Why is gravity a good illustration of a field?Every mass of stuff has an area surrounding it where other bodies may feel its gravitational pull.A gravitational field is the name given to this area of space.The gravitational field has direction, just like other electromagnetic fields like the electric and magnetic fields.It's a vector field as a result.
What does a field mean in terms of physics?field is a zone in physics where each point is connected to a physical quantity.The quantity could be a vector, such as in the case for fields like the gravitational field, that are linked to a force, or it could be a number, such as in the case of scalar fields like the Higgs field.
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butanoic acid has a partition coefficient of 3.0 (favoring benzene) when distributed between water and benzene. find the formal concentration of butanoic acid in each phase when 100.0 ml of 0.10 m aqueous butanoic acid is extracted with 25.0 ml of benzene at a ph of 4.00.
The formal concentration of butanoic acid in water phase = 0.060 M.
The formal concentration of butanoic acid in benzene phase = 0.0157 M.
given that :
volume of aqueous phase = 100 mL
volume of benzene = 25 mL
pH = 4
partition coefficient = 3
pH = - log [H⁺]
[H⁺] = 10⁻⁴ M
distribution coefficient is given as :
D = K [H⁺] / [H⁺] + Ka
Ka for the butanoic acid is 1.52 × 10⁻⁵
D = 93 × 10⁻⁴ / 10⁻⁴ +) 1.52 × 10⁻⁵
D = 2.60
fraction of the butanoic acid in water phase :
q = v1 / v1 + Dv2
q = 100 / 165
q = 0.60
concentration of the water phase = 0.60 × 0.10 M
= 0.060 M
moles of benzoic acid = (0.10 × 100) / 100
= 0.010 mol
mole fraction fraction of benzene phase :
1 - 0.060 = 0.394 mol
moles in benzene phase = 0.394 × 0.01 = 0.0039 mol
concentration = 0.0039 / 0.025
= 0.157 M
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Compared to saturated fatty acids, unsaturated fatty acids have O lower melting points. Ohigher melting points. O greater intermolecular attraction. O shorter carbon chains. O longer carbon chains.
If we compare the melting points of saturated fatty acids and unsaturated fatty acids, the saturated acids have higher melting points than unsaturated acids of corresponding size.
Lower the unsaturation, more will be the hydrogen atoms that fatty acid has. Hence, more saturated it is, So higher is the melting temperature of the fatty acid.
Whereas in Unsaturated fatty acids, most of the times the geometry of the double bond is a cis configuration in natural fatty acids.
So, the intermolecular interactions are much weaker than the saturated molecules.
Hence, the melting points are much lower in case of unsaturated fatty acids.
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a 50.0 ml sample of an aqueous h2so4 solution is titrated with a 0.395 m naoh solution. the equivalence point is reached with 65.88 ml of the base. what is the concentration of the h2so4 solution?
The concentration of H2SO4 is 98% H2SO4 by mass and has a density of 1.8 g/L.
In chemistry, concentration is the amount of an ingredient divided by the total volume of the mixture. There are several types of mathematical descriptions, such as mass concentration, molarity, number concentration, and volume concentration. Concentration is usually expressed in molarity, defined as the number of moles of solute in 1 L of solution.
Specializations are specializations within the selected course. You can choose your concentration at both undergraduate and postgraduate levels, depending on which university you want to study.
Quantitative units of concentration include molarity, molarity, mass percent, parts per thousand, parts per million, and parts per billion.
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Explain why the standard enthalpy of formation () for Cl2 (g) is zero, but its standard entropy is larger than zero.
The standard enthalpy of formation for chlorine is zero but the standard entropy is larger than 0 because it is the elemental state of chlorine.
The standard enthalpy of formation for chlorine is zero because cl2 is the elemental state of chlorine and it does not require any energy for the formation of the standard state of chlorine.
The entropy of any system cannot be negative. It can only be positive or zero.
The entropy of a system will become zero only at a absolute zero temperature.
That's why the entropy of chlorine in elemental state is more than zero because absolutely zero temperature can't be obtained.
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Complete the valence molecular-orbital diagram for oxygen, 02- 2p Answer Bank 2s 2s
The bonding molecular orbitals are of lower energy. So, they are first to fill up. The antibonding orbitals are of higher energy than bonding orbitals.
According to molecular orbital theory molecular orbitals of a molecule is formed by combination of its atomic orbitals and electrons present in molecule are distributed among the molecular orbitals.
The total number of electrons present in O2 molecule are 16. Thus, the electronic configuration for combination of two atomic orbitals of oxygen is as follows.
Here sigma and pi orbitals are called bonding molecular orbitals. The sigma star and pi star are called antibonding orbitals.
The electronic configuration is the distribution of a molecule in molecular orbitals. Total number of electrons present in molecule is 16. Thus, 16 electrons are filled in its molecular orbitals.
In orbital, the valence orbitals are 2s and 2p and total number of electrons in these orbitals are 12. Thus, Construct valence molecular orbital diagram and fill 12 electrons as attached.
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12 Which of the following molecules is an example of Cs point group? (2 Points) CHCl3 CH4 CHFCIBr CHzClBr CCl4
CHzClBr has Cs point group
CCl4, CH4 have Td point group (Tetrahedral Point Group)
CHCl3 has C3r point group and the structure
CHFClBr has C1 point group of symmetry.
What is Cs point group?The Cs Point Group, those properties belonging to irreducible representation A' are symmetric to both the identity operation E as well as reflection through the mirror plane.
In a tetrahedral molecular geometry, a central atom is located at the center with four substituents that are located at the corners of a tetrahedron. The bond angles are cos⁻¹ ≈ 109.5° when all four substituents are the same, as in methane as well as its heavier analogs.
Here,
CHzClBr has Cs point group
CCl4, CH4 have Td point group (Tetrahedral Point Group)
CHCl3 has C3r point group and the structure
CHFClBr has C1 point group of symmetry
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write a correct balanced chemical equation
Decomposition of nickel (II) oxide to its elements
The decomposition of nickel (II) oxide can be written as; 2NiO (s) ---->2Ni(s) + [tex]O_{2}[/tex] (g)
What is the balanced reaction equation?We know that a reaction is said to be balanced when the number of atoms on the reactant side is equal to the number of atoms of the same element on the products side.
Now we are asked to obtain the balanced reaction equation that can be written for the reaction that involves the decomposition of nickel (II) oxide to its elements. This decomposition reaction would lead to the formation of nickel and oxygen.
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(3 pts) The following is one Lewis structure for the SeO42- ion (selenate ion): Draw three ofthe resonance structures for this ion (there are more than three possibilities). '0: 0-Se-o: 'O:
In Lewis structure for the SeO42 all 32 of the valence electrons that make up the SeO42- ion are utilised in the sketch above.
When both protons are taken out of selenic acid, selenate, a divalent inorganic anion, is left behind. It serves as a metabolite for humans. It is a divalent inorganic anion and a selenium oxoanion. It is a hydrogen selenate's conjugate base. A highly simple illustration of the valence shell electrons in a molecule is called a Lewis structure or electron dot structure. It describes how the valence electrons are positioned around the various molecules' atoms. The valence shell electrons in a molecule are depicted in an extremely simplified manner by a Lewis Structure. It is used to demonstrate how the electrons in a molecule are positioned around particular atoms. When two atoms are bonded together, electrons are depicted as "dots" or as a line. The octet rule, which states that atoms share electrons so that each has eight in its outer shell, is the foundation of a Lewis structure. For instance, the outer shell of an oxygen atom has six electrons. The ion with the chemical formula SeO23 is referred to as selenite. It is the selenium oxyanion. It is the sulfite ion's selenium analog, SO23. As a result, selenium's oxidation state is assigned, and selenite is pyramidal.
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if a bottle of nail polish remover contains 174 ml of acetone, how much heat would be released by its complete combustion? the density of acetone is 0.788 g/ml . express your answer in kilojoules.
−4000⋅kJ is heat would be released by its complete combustion.
What is Combustion?
Combustion, a chemical reaction among materials, generally which include oxygen and usually observed by way of the era of heat and light in the form of flame. The charge or velocity at which the reactants combine is excessive, in element because of the character of the chemical response itself and in element due to the fact greater power is generated than can get away into the surrounding medium, with the result that the temperature of the reactants is raised to boost up the reaction even more.
A familiar example of a combustion reaction is a lighted suit. When a in shape is struck, friction heats the head to a temperature at which the chemical substances react and generate extra warmness than can get away into the air, and that they burn with a flame. If a wind blows away the warmth or the chemicals are wet and friction does now not improve the temperature sufficiently, the in shape is going out.
Moles of acetone= 176⋅L×0.788⋅gmL−158.08⋅g⋅mol−1
=2.39⋅mol
−4000⋅kJ is heat would be released by its complete combustion.
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6_ Water is frequently disinfected with chlorine gas, forming hypochlorous acid (HOCL) which partially ionizes to hypochlorite and hydrogen ions as follows: HOCI H+ + OCl : Ka = 2.9x 10-8 The amount of [HOCl], which is a better disinfectant, depends 0n the pH: Find the hypochlorous fraction at pH 5, 9,and 11. What pH is the best for having highest disinfection (according to you)?'
At pH 5, the hypochlorous fraction is 0.00029. At pH 9, the hypochlorous fraction is 0.48. At pH 11, the hypochlorous fraction is 0.999.
The best pH for having the highest disinfection is pH 11, since it has the highest hypochlorous fraction. At higher pH values, the hydrogen ion concentration is lower and there is a higher concentration of HOCl, which is a better disinfectant.
Hypochlorous Fraction:Hypochlorous acid (IUPAC name chloro (I) acid) is a weak acid with the chemical formula HClO. It is produced when chlorine dissolves in water. It cannot be isolated in pure form due to rapid equilibration with the precursor. HClO is used as a bleach, oxidizer, deodorant, and disinfectant.
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