Therefore, if the volume of sulphur hexafluoride is increased to 8.150 litres, the final temperature is 0.106 o C.
what is sulfur hexafluoride gas?The inorganic compound Sulphur hexafluoride, sometimes known as sulphur hexafluoride, has the formula SF6. It is a gas that has no colour, no smell, is not combustible, and is not harmful. Six fluorine atoms are joined to a sulphur atom in the middle of the compound SF 6, which has an octahedral structure. It is a molecule with a high valent. An artificial, odourless gas called SF6 is utilised in the energy sector to maintain the security and dependability of networks. Because it is highly stable, non-toxic, inflammable, and electronegative, it won't combine with other substances that would change how it behaves or how effective it is.
Is SF6 bad for the environment?It is a strong greenhouse gas with a great potential to contribute to global warming, and its concentration in the earth's atmosphere is rising quickly. Under electrical stress, SF6 breaks down during its working cycle, creating hazardous metabolites that represent a health risk to working employees in the event of exposure.
PV = nRT
R is a constant, pressure is assumed to be constant, and moles and n are, of course, constants.
Direct variation is now the only option.
final temperature and volume
V = kT
final temp and volume
v = kt
I believe this concept is known as Charles' law.
V/v = T/t
7.600 x 10-1 × 8.150= 5.817 x 101 / t
0.76×8.150=58.17×t
t = 0.106 o C
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Determine the enthalpy of solution for a solid with ΔH values as described in each scenario.
- a solid with ΔH values of approximately equal magnitude for each of the steps involved in the solution formation process.
- a solid with ΔH values for the breaking of attractions that are three times the magnitude compared to forming of attractions
- a solid with ΔH values for the breaking of attractions that are one third the magnitude compared to forming of attractions
Chemistry is the name of the scientific discipline that examines molecules and chemical bonds. There are two different kinds of solutions: acidic and basic.
The precise response is stated and is given.
Box 1, with a positive value for the H solution (endothermic)
Box 2's H value is zero, and Box 3's H solution has a negative value (exothermic)
What is enthalpy of heat?The amount of heat exchange between a system and its surroundings is measured by the delta H reaction (H). H can be either positive (endothermic, which requires heat), or negative (exothermic, which releases heat). How much heat is produced or absorbed during the dissolution process determines the enthalpy of solution formation. It can therefore be either negative (exothermic) or positive (endothermic).
The correct answer is mentioned as described:
Box 1, the value of ΔH solution is positive (endothermic)
Box 2 ΔH value = 0 and ,
Box 3 ΔH the value of ΔH solution is negative (exothermic)
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List the following atoms in order of increasing ionization energy: Li, Na, C, O, F. A) Li < Na < C < O < F B) Na < Li < C < O < F C) F < O < C < Li < Na D) Na < Li < F < O < C
The order of increasing ionization energy: Na < Li < C < O < F. Ionization energy rises throughout time, and as a group descends, IE falls.
A neutral atom is simpler to remove an electron from than a positive ion, and a negative ion is even simpler. Since lower ionization energy indicates simpler electron removal, O+>O>O is the correct order for IE. Since fluorine has more protons, it has a higher nuclear charge, which attracts electrons more strongly. Lithium is the group I element with the highest ionization enthalpy, but it also has the highest oxidation potential, making it the strongest reducing agent.
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Question 1 (1 point) The form of amino acid is a dipolar ion that carries both positive and negative charge. cationic anionic zwitterionic none of these
The zwitterionic form of an amino acid is just a dipolar ion that possesses both negative and positive charges.
Describe Zwitterion.a molecule with both both negative and positive charges filed on some of its atoms, but a net procedural charge of zero. One or more intended to commit are required to bind the charged atoms together. NaCl & NH4Cl are not zwitterions because the charged protons are not physically bound to one another.
Is zwitterionic a good or bad thing?Zwitterions have a neutral overall charge and contain both positive and negative charged groups. The usage of such compounds as friendly coverings for materials was motivated by the zwitterionic properties of cell membranes. A basic methyl group or an corrosive carboxylate group are both present in amino acids.
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What is an asteroid that is pulled off course by a plant's gravity and orbits around that plant called ?
a. meteorite
b. meteor
c. moon
d. meteoroid
A element meteoroid is an asteroid that circles around a plant after being deflected from its trajectory by the plant's gravity.
How is an object that even a planet's gravity causes to veer off course?An asteroid may turn into a satellite of a planet if it is drawn in by the gravitational influence of the that planet. The two Martian satellites, Phobos and Deimos, are thought to have entered orbit around the planet in this manner by astronomers.
Are asteroids kept in orbit by a planet's gravitational pull?Even when they are far from the Sun, asteroids and other tiny bodies, such as comets, are held in orbit by the Sun's powerful gravitational attraction. As with Mars' two moons, they can likewise be propelled into orbit around with a planet.
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13 electrons are total in an element, what is it's quantum number.
Answer:
Explanation:
The quantum number of an element with 13 electrons is 2. The first quantum number, n, is the principal quantum number and describes the energy level of the electron. In this case, the principal quantum number of the element with 13 electrons is 2, meaning that the electrons are in the second energy level. The second quantum number, l, describes the shape of the orbital. In this case, the second quantum number is 1, meaning that the orbital is an s-orbital. The third quantum number, ml, describes the orientation of the orbital. In this case, the third quantum number is -1, 0, or +1, meaning that the orbital is oriented in the -x, 0, or +x direction. The fourth quantum number, ms, describes the spin of the electron. In this case, the fourth quantum number is +1/2 or -1/2, indicating that the electron has either a clockwise or counter-clockwise spin.
What Is the longest wavelength of a photon that can ionize a hydrogen atom in its ground state? Specify the type of radiation.
The longest wavelength of a photon that can ionize a hydrogen atom in its ground state is known as the Lyman-alpha line, which has a wavelength of 121.6 nm and is part of the ultraviolet (UV) spectrum. Ionization is the process by which an atom or molecule loses one or more of its electrons, resulting in the formation of an ion. In the case of hydrogen, ionization occurs when an electron in the ground state is excited to a higher energy level by absorbing a photon with enough energy.
The Lyman-alpha line is the first line in the Lyman series, which is a series of ultraviolet transitions that occur in the hydrogen atom when an electron makes a transition from the n=2 level to the n=1 level, where n is the principal quantum number.
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Rank substituents in order of their priority when assigning the E or Z label to an alkene. highest priority lowest priority NH2 CH3 Br CH2CH2H
When giving an alkene the E or Z label, the following substitutes are listed in order of importance:
NH₂
Br
CH₃
CH₂CH₃
What is compound?A chemical compound is a substance that contains atoms from multiple chemical elements held together by chemical bonds. It is made up of numerous identical molecules. Therefore, a molecule made up of only one type of atom is not a compound. a substance created by joining two or more different elements chemically in science. Examples of compounds are table salt (NaCl), which is made from the elements sodium and chloride, and water (H2O), which is created from the elements hydrogen and oxygen. A substance made up of two or more components is called a compound. Table salt, water, and carbon dioxide are a few examples of compounds.
Here,
Substituents in order of their priority when assigning the E or Z label to an alkene:
NH₂
Br
CH₃
CH₂CH₃
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Write the chemical equation for the ionization of dimethylamine, (CH3)2NH in aqueous solution.
The reaction is also an example of proton transfer, as the proton (H+) from the dimethylamine is transferred to water, forming the cation and anion.
What is dimethylamine?Dimethylamine is an organic compound with the molecular formula CH3-2-NH2. It is a base, colorless gas with a strong, fishy odor and is used in a variety of industrial applications.
The ionization of dimethylamine (CH3)2NH in aqueous solution can be represented by the following chemical equation:
(CH3)2NH + H2O → (CH3)2NH2+ + OH-
In this reaction, dimethylamine reacts with a water molecule to form a dimethylammonium cation (CH3)2NH2+ and a hydroxide anion OH-. This reaction is an example of an acid-base reaction, where dimethylamine is the acid and water is the base. The reaction is also an example of proton transfer, as the proton (H+) from the dimethylamine is transferred to water, forming the cation and anion.
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a solution contains one or more of the following ions: hg2 2, ba2 , and fe2 . when potassium chloride is added to the solution, a precipitate forms. the precipitate is filtered off and potassium sulfate is added to the remaining solution, producing no precipitate. when potassium carbonate is added to the remaining solution, a precipitate forms. part a which ions were present in the original solution? check all that apply. which ions were present in the original solution?check all that apply. hg2 2 ba2 fe2
The original solution contained the Hg2+2, Ba2+, and Fe2+ ions.
What is original solution?Original solutions are creative, unique approaches to problem solving or addressing an issue. They are not replicas of existing ideas or solutions but instead are fresh and inventive ways of tackling a problem. Original solutions often require a combination of critical thinking, innovative ideas, and creative problem solving.
When potassium chloride was added, a precipitate formed due to the formation of insoluble compounds such as BaCl2 and FeCl2. When potassium sulfate was added, no precipitate formed because the sulfate ion is soluble in solution. Finally, when potassium carbonate was added, a precipitate formed due to the formation of insoluble compounds such as BaCO3 and FeCO3.
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how many valence electrons total would be contained in a sample of 4.78 million kg of sulfur
The total number of valence electrons contained in a sample of 4.78 million kg of sulfur would be 5.3078 x [tex]10^{32[/tex] valence electrons.
Number of atoms in a mass of a sampleAccording to Avogadro, 1 mole of any substance contains 6.022 x [tex]10^{23[/tex] atoms.
4.78 million kg of sulfur = 4,700,800 kg = 4,700,800,000 grams
Mole = mass/molar mass
Mole of 4,700,800,000 grams sample of sulfur = 4,700,800,000/32
= 146900000 moles
146900000 moles = 146900000 x 6.022 x [tex]10^{23[/tex] atoms
= 8.8463 x [tex]10^{31[/tex] atoms
Now each atom of sulfur contains 6 valence electrons. Thus, total number of valence electrons would be:
6 x 8.8463 x [tex]10^{31[/tex] = 5.3078 x [tex]10^{32[/tex] valence electrons
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found to have a mass of 37.16 grams. brass is an alloy composed of only copper and zinc, and it reacts with an excess amount of 86.203 grams of hydrochloric acid via the balanced equation below. at the end of the reaction, 45.387 grams of zinc chloride was produced. what was the mass of hydrogen gas formed
According to the balanced equation, zinc metal interacts with hydrochloric acid: ZnCl2(aq) + H2 Zn(s) + 2 HCl(aq) ( g) In a coffee-cup calorimeter 0.103 g of Zn(s) are mixed with 50.0 mL of HCl to create a solution. All of the zinc reacts, increasing the solution's temperature from 22.5 °C to 23.7 °C. To perform this reaction as described, locate Hrxn(Use 4.18 J/g # °C as the specific heat capacity and 1.0g mL as the density of the solution
Explanation: Before doing the arithmetic use "Dimensional Analysis to establish what conversion factors you will need. g \smL \s× \s?? \s?? \s= \slbs \sgal
We require a volume conversion unit (mL gal) and a mass conversion unit (g pounds)For the sake of our calculation 1 lb equals 454 g
Volume will be calculated in two steps: m L L and t h e n L g a l
1 g a l equals 3.785 L and 1 L equals 1000 m LIf we combine these we get
1 \sg \sa \sl \s= \s3.785 \sL \s× \s1000 \sm \sL \sL \s= \s3785 \sm \sL
3785 \sm \sL \s1 \sg \sa \sl
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what is the difference between chemically defined and chemically complex media? give either a clinical
The difference among chemically defined and chemically complex media are the compositions.
What is the difference between chemically defined media and complex media?Chemically defined media contain pure biochemical; thus, the chemically defined media contain exactly known chemical composition. On the other hand, complex media contain complex materials such as blood, milk, beef extract, yeast extract, etc., so the chemical composition of the complex media is unknown.
Chemically defined media is all known compositions, The example is being glucose broth. When chemically complex media is unknown and can vary from batch to batch, example being nutrient broth.
Complex media are generally used for cultivation of bacterial pathogens and other fastidious bacteria. Most pathogenic bacteria of animals, that have adapted themselves to growth in animal tissues, need complex media for their growth.
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Determine the position in the tube where the white ring of solid ammonium chloride (NH4Cl) will form.
When the two gases come together, an NH4Cl white ring will develop. Let x be the HCl's journey distance. The distance covered by the NH3 is thus equal to 1.463x. So, the white ring will form 0.8 m away from the HCl end.
Explain the white ring of solid ammonium chloride?The junction of the two gases within the tube develops a white ring of solid ammonium chloride. Use transparent plastic to cover an overhead projector's non-glass surfaces if necessary. Put a second cotton swab in concentrated aqueous ammonia and a Q-tip in concentrated hydrochloric acid (HCl) (NH3).Because hydrogen chloride diffuses more slowly than ammonia, the ring often develops closer to the hydrochloric acid end of the tube. This is the case because the rate of diffusion is inversely related to the square root of the gas's molecular mass and hydrogen chloride has nearly twice the molecular weight of ammonia.Because ammonia particles are lighter than hydrogen chloride particles and move more quickly, the white ring of ammonium chloride develops closer to the hydrochloric acid end.Learn more about solid ammonium chloride refer to :
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Caffeine is the active ingredient in coffee, tea, and some carbonated beverages. Add lone pairs, as needed, to the structure of caffeine. Indicate the hybridization of the specified atoms. Be sure to consider any lone pairs you added in part a.
The nitrogen atoms have a hybridization of sp3, due to the three covalent bonds and the lone pair that was added in part a.
What is hybridization?Hybridization is the process of combining two or more different varieties, species, or breeds of plants or animals to produce offspring with characteristics from each of the parent organisms. Through hybridization, animals can be selectively bred to produce desired traits, while plants can be bred to produce higher yields and resist diseases.
Caffeine has a molecular formula of C8H10N4O2. The structure of caffeine is as follows:
O
//\\
N=C-N-C=C-N-C-N
|
O
The oxygen atoms have a hybridization of sp3, due to their four electron pairs (three covalent bonds and one lone pair).
The nitrogen atoms have a hybridization of sp3, due to the three covalent bonds and the lone pair that was added in part a.
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What pH is needed to produce this value of Q if the concentration and pressure values are
[Br2]=4.50×10−4M,
[Br−]=11.10M,
[SO42−]=9.90M, and
PSO2=3.50×10−5atm?
Express your answer numerically to two decimal places.
Q=1.9*10^-26
pH will be needed to produce the given value of Q is 9.28.
Pressure is the force applied which is perpendicular to the surface of an object per unit area which that force is distributed. Pascal will be the SI unit of pressure. P = F / A
P is the pressure whereas, A is the area of the surface as well as F is the magnitude of the normal force.
The following reaction will be follows:
2H₂O + Br₂ + SO₂ -> 2Br- + SO₄²⁻ + 4H⁺
This expression represents the relation between given reaction and Q will be as follows:
Q = [Br-]² [SO₄²⁻] [H⁺]4 / [Br₂] Pso₄
1.4 ₓ 10-26 = (11.85)2 ₓ (8.350) ₓ [H⁺]4 / (2.5 ₓ 104) ₓ 2.50 ₓ 105
[H⁺]4 = 7.46 ₓ 10⁻³⁴
[H⁺] = 5.22 ₓ 10⁻¹⁰
Relation between pH and [H⁺] is as follows:
ph = -log[H⁺]
= - log 5.22 ₓ 10-10
= -(0.717 - 10)
= 9.28
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Complete the subscripts on the following equations.
Psolvent = X solvent x Po
Psolute = X x P
Psolvent = (1-X )x Po
AP = P° solvent Psolvent = X x Po
The total pressure of the solution is equal to the pressure of the solvent.
What is solute?Solute is a substance that is dissolved in a solvent to form a solution. It is the component of the solution that is present in the lesser amount compared to the solvent. In a solution, the solute is the substance that is being dissolved, while the solvent is the substance in which the solute is being dissolved. For example, when sugar is dissolved in water, the sugar is the solute and the water is the solvent. The solute is typically the minor component of the solution and can be a solid, liquid, or gas.
The above equations explain the relationship between the pressure of the solution (AP) and the pressure of the solvent (P° solvent) and solute (P° solute). The subscripts X and (1-X) represent the mole fractions of the solvent and solute, respectively. X is the mole fraction of the solvent present in the solution, while (1-X) is the mole fraction of the solute present in the solution. The total pressure of the solution (AP) is equal to the sum of the pressure of the solvent (X x Po) and the pressure of the solute ((1-X) x Po). This equation can be simplified to AP = Po (X + (1-X)). Since X + (1-X) = 1, the equation simplifies to AP = Po. This equation indicates that the total pressure of the solution is equal to the pressure of the solvent.
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Try Again Your answer is incorrect. • Compound COCO3. Your answer is incorrect. • Compound NiSO4: Your answer is correct. It is traditional to write the number part of the charge first in an ion symbol.• Compound CrS: Your answer is correct. It is traditional to write the number part of the charge first in an ion symbol. • Compound VBrz: Your answer is correct. It is traditional to write the number part of the charge first in an ion symbol. Complete the table below by writing the symbols for the cation and anion that make up each ionic compound. The first row has been completed for you. ionic compound cation anion Naci Na a x 5 ? Coco, co? Ni Niso som Crs V Bry Br Explanation Recheck
molecule NiSO4 The response is accurate. In an ion symbol, the number component of the charge is often written first. Combination CrS: Your response is accurate.
Compound types: what are they?Different Compounds
Salts and molecular compounds are the two categories into which compounds can be divided. Covalent bonds hold the atoms together in molecular molecules. Ionic bonds hold it together in salts. Every compound is composed of one of these two types of bonds.
What makes water a compound, and why?Because it is composed of molecules of water, water is a compound. Water atoms don't actually exist. Atoms of hydrogen gas make up water molecules in a certain ratio of two hydrogen atoms to one oxygen atom.
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suppose you have two identical 1.0 l sealed containers. both containers are kept at exactly 25c. one vessel contains only neon gas at 1.5 atm, and the other contains only xenon gas at 2.5 atm. a0 is the average kinetic energy possessed by the neon atoms greater than, equal to, or less than that of the xenon atoms? explain. b) what variable must be changed in order to decrease the average kinetic energy of the xenon atoms
The average kinetic energy of a gas's molecules is influenced by its temperature and molar mass. However, all gases have the same average kinetic energy when the temperature is the same.
Which energy do you mean by kinetic?
Describe kinetic energy. A particle or an item that is in motion has a sort of energy called kinetic energy. An item accumulates kinetic energy when work, which involves the transfer of energy, is done on it by exerting a net force.
What is the energy equation?
Albert Einstein created the equation E = mc2, which typically states that when a body's energy changes by an amount E (no matter what form the energy takes),
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Cite the evidence that indicates that only physical changes occur when a platinum wire is heated in a Bunsen burner flame. (More than one answer may be correct.) O A new substance was formed after heating the wire. O The wire changed color during the heating, O No change in the composition of the platinum could be detected. O The original appearance was restored when the wire cooled e Textbook and Media
Evidence that indicates that only physical changes occur when a platinum wire is heated are option B: the wire changed color and option D: original color was restored.
In a physical change, the substance's shape or appearance changes, but the type of matter it contains stays the same. In contrast, when matter undergoes a chemical transformation, at least one new substance with novel features is created. When platinum wire is heated in a burner flame, its look changes from silvery metallic to flaming red, which is an example of a physical transformation. However, cooling the platinum will return it to its natural appearance.
Platinum has a very low reactivity, therefore unlike many other metals, it does not react with air oxygen to generate a metallic oxide. It is only a physical alteration because heating doesn't result in any chemical changes.
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Not all of the orbitals in the n = 4 shell are shown in this figure. Which subshells are missing? a. 4f
b. 4k
c. 3d
d. 4d
e. 1p
The 4d and 4f subshells are not shown in this figure, so they are the missing subshells.
What is orbitals?In atomic theory and quantum mechanics, an atomic orbital is a function that explains the position and wave-like behavior of an electron in an atom. This function can be used to determine the probability that an electron will be located in any area surrounding the nucleus of any atom. A three-dimensional representation of an electron's most likely position within an atom is called an orbital. The probability of discovering an electron close to a hydrogen atom's nucleus is shown in the diagram below. The 1s orbital has the highest probability, it is important to note. Orbitals are a mathematical function used in physics and chemistry to represent the wave nature of an electron or a pair of electrons in an atom.
Here,
The 4d and 4f subshells are missing because they are not shown in the figure.
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A chemist wants to find Kc for the following reaction at 736 K:2NH3(g) + 3 I2 (g) LaTeX: \Longleftrightarrow ? 6HI(g) + N2(g) Kc = ?Use the following data at 736 K to find the unknown Kc:(1) N2(g) + 3 H2(g) LaTeX: \Longleftrightarrow ? 2 NH3(g) Kc1 = 0.318(2) H2(g) + I2(g) LaTeX: \Longleftrightarrow ? 2 HI(g) Kc2 = 55Enter to 0 decimal places.
Kc for the reaction [tex]2NH3(g) + 3 I2 (g) LaTeX: \Longleftrightarrow ? 6HI(g) + N2(g)[/tex]at 736 K is 87000
To find the Kc of the given reaction at 736 K, we can use the equilibrium constant expression for the reaction and the given Kc values for the two related reactions.
The equilibrium constant expression for the reaction at 736K is:
[tex]Kc = [HI]^6 * [N_2] / [NH_3]^2 * [I_2]^3[/tex]
We can then use the given Kc values for the two related reactions to find the Kc of the given reaction:
[tex]Kc1 = [NH_3]^2 / [N_2] * [H_2]^3[/tex] = 0.318
[tex]Kc2 = [HI]^2 / [H_2] * [I2][/tex] = 55
We can then substitute the Kc1 and Kc2 values into the Kc expression for the given reaction and solve for Kc:
Kc = ([tex]Kc1 * Kc_2^3[/tex]) = 0.318 * 55^3 = approximately 8.7 x 10^4
So, Kc = 87000
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chemical equations are a shorthand way of describing how species known asare converted into . (a) reactants; solvents (b) products; solutes (c) solutes; solutions (d) reactants; products
One or more chemicals can convert into one or more new substances through a chemical reaction. Chemical equations are used to describe chemical reactions.
How do chemical equations come into being?
A chemical equation is made up of a list of reactants (the chemicals used to start the reaction) on the left, an arrow symbol, and a list of products (the substances created during the reaction) on the right.
What does utilized in a chemical equation mean?
Meaning. + used to distinguish one product or reactant from another. employed to separate the reactants from the products; when the equation is read, it is pronounced "yields" or "produces."
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Give the electron-domain and molecular geometries for the following molecules and ions. molecular geometry -Select- electron domain (a) NH CI ---Select- (b) C032 ---Select- (c) BF3 --Select-- (d) XeF4 ---Select-- (e) CIO3 ---Select- (f) XeF2 ---Select-
The following ions and compounds. electron domain, molecular geometry (a) NH CI, Select-(b) C032, Select-(c) BF3, and Select-(d) XeF4.
How are the electromagnetic domain and molecular formula determined?To reduce repulsion, distribute the electron domain around the center atom. The overall amount of electron regions is counted. To ascertain the molecular geometry, consider the angular configuration of both the chemical bonds holding the atoms together. Remember that a bond with several atoms (such as a double or triple bond) counts into one electron domain.
What are the purposes of the molecular geometry and electron domain geometry?Result for an image Please provide the molecular and electron-domain geometries for following compounds and ions. molecular architecture Electron domain, choose (a) —-Select-NH CI (b) BF3 —Select— (d) XeF4 —-Select— C032 —-Select- (e)
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Consider these chemical equations. N2(g) + 3H2(g) → 2NH3(g) C(s) + 2H2(g) → CH4(g) 4H2(g) + 2C(s) + N2(g) → 2HCN(g) + 3H2(g) Which equation(s) do you need to reverse in order to calculate the overall equation for the formation of HCN and H2 from NH3 and CH4?Check all that apply. N2(g) + 3H2(g) 2NH3(g) C(s) + 2H2(g)CH4(g) 4H2(g) + 2C(s) + N2(g) 2HCN(g) + 3H2(g)
The equations that must be reversed to produce the overall equation are equations 2 [tex]C+2H_{2} -- > CH_{4}[/tex] and equation 1 [tex]N_{2} + H_{2} -- > 2NH_{3}[/tex]. As a result, options A and B are accurate.
In the chemical symbolization, the chemical equation is defined as the reaction for the production of products. The production of the consequent reaction has occurred from the inclusion of many stages in the proper sequence.
Chemical formulas
The chemical equations are shown in the accompanying figure.
The ultimate reaction to be obtained is depicted in the accompanying picture.
Methane and ammonia were the reactants for the production of carbon and hydrogen in the following process.
Methane was on the product side in equation 2, while ammonia was on the product side in equation 1.
Thus, in order to reach the overall equation, equations 2 and 1 must be inverted. As a result, options A and B are accurate.
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The circled section of the bottle represents A. translucency B. transparency C. opacity
Answer:
Opacity
Explanation:
Opacity is where path of light is totally blocked. The cap will totally block the light in its path. Whereas, if you flash a light on the plastic (which will be transparent cuz light goes straight thru to other side, and if you flash light on liquid, it will scatter a little but still make to other side (translucent)
Complete and balance the following equation: H2O2(aq)+ClO2(aq)→ClO2−(aq)+O2(g) (basic solution) Express your answer as a chemical equation. Identify all of the phases in your answer. H2O2(aq)+2ClO2(aq)+2OH−(aq)→O2(g)+2ClO2−(aq)+2H2O(l) What is the oxidant and reductant?
H2O2 is the reductant and ClO2 is the oxidant.
What does the term "reductant" mean?A material used in photography to reduce the density of a negative or print by oxidizing part of the free silver; capable of reducing another substance as it itself is oxidized. alternatives: reducing agent, reducer.
What do the terms "reducing agent" and "reductant" mean?A reducing agent is a material that, in a redox process, loses electrons to other substances and undergoes oxidation to a higher valency state. One of the reactants of an oxidation-reduction process is a reducing agent, which decreases the other reactant by discharging electrons to it.
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which term best describes filling a tank and treating the water or preparing a chemical solution before the tank is emptied and ready to repeat the process?
The term "activated sludge" refers to the process of filling a tank with water or a chemical solution, treating it, and then emptying the tank so the process can be repeated.
A biological floc made up of bacteria and protozoa is used in the activated sludge process, a form of biological wastewater treatment method, to treat sewage or industrial wastewaters. According to WEF, the term "activated sludge" describes a flocculent culture of organisms grown in regulated circumstances in aeration tanks. Activated sludge often has a brown hue. Waste activated biosolids or waste activated solids are other names for activated sludge. The activated sludge method can be employed in a sewage (or industrial wastewater) treatment facility for one or more of the following goals: biological matter is oxidizing carbonaceous stuff.
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Calculate the root mean square velocity and kinetic energy of F2 , Cl2 , and Br2 at 298KRank the 3 halogens with respect to their rate of effusion.
To calculate the root mean square velocity and kinetic energy of F2, Cl2, and Br2 at 298K, we need to use the kinetic theory of gases.
The root mean square velocity of a gas can be calculated using the formula:
v_rms = √(3kT/m)
where k is the Boltzmann constant, T is the temperature in Kelvin, and m is the molar mass of the gas.
The kinetic energy of a gas can be calculated using the formula:
E_k = (1/2)mv_rms^2
At 298K, the root mean square velocity and kinetic energy of F2, Cl2, and Br2 can be calculated as follows:
F2:
molar mass = 2 * 18.998 g/mol = 37.996 g/mol
v_rms = √(3 * 8.314 J/mol*K * 298K / 37.996 g/mol) = √(0.0244) m/s
E_k = (1/2) * 37.996 g/mol * (0.0244 m/s)^2 = 0.0167 J/mol
Cl2:
molar mass = 2 * 35.453 g/mol = 70.906 g/mol
v_rms = √(3 * 8.314 J/mol*K * 298K / 70.906 g/mol) = √(0.0132) m/s
E_k = (1/2) * 70.906 g/mol * (0.0132 m/s)^2 = 0.0051 J/mol
Br2:
molar mass = 2 * 78.918 g/mol = 157.836 g/mol
v_rms = √(3 * 8.314 J/mol*K * 298K / 157.836 g/mol) = √(0.0064) m/s
E_k = (1/2) * 157.836 g/mol * (0.0064 m/s)^2 = 0.0016 J/mol
To rank the halogens with respect to their rate of effusion, we need to consider the root mean square velocity of each gas. The rate of effusion of a gas is directly proportional to the root mean square velocity of the gas, which is the velocity of the gas particles. Therefore, the gas with the higher root mean square velocity will effuse faster than the gas with the lower root mean square velocity.
From the above calculation, we can see that the root mean square velocity of F2 is the highest, followed by Cl2, and then Br2. Therefore, the halogens can be ranked in terms of their rate of effusion as follows:
F2
Cl2
Br2
So Fluorine(F2) will effuse faster than Chlorine(Cl2) and Bromine(Br2)
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A student is given a sample of a pure, white crystalline substance. Which of the following would be most useful in providing data to determine if the substance is an ionic compound
The electrical conductivity of a substance's aqueous solution is tested if the substance is an ionic compound.
An ionic substance is one that is formed as a result of the transfer of electrons (s) from one atom to another of the combining species.
When a metal and a nonmetal chemical react, an electron is always transferred from the metal to the nonmetal. As a result, an ionic bond is always formed between a metal and a nonmetal. Water is a polar substance, and polar or ionic substances dissolve easily in it. When an ionic compound dissolves in water, it dissociates into ions. And, because electricity is the flow of ions or electrons, an ionic solution in water can conduct electricity.
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Blood is buffered by carbonic acid and the bicarbonate ion. Normal blood plasma is 0.024M in HCO3 and 0.0012M H2CO3 (pKa1 for H2CO3 at body temperature is 6.1). What is the pH of blood plasma? Given the volume from part B, what mass of NaOH could be neutralized before the pH rose above 7.8?
Carbonic acid and also the boric acid act as blood buffers. HCO₃ ratios in blood cell plasma are 0.024 and 0.002, resp. Plasma has a pH of 7.4, HCl weighs 0.3 grammes, and NaOH weighs 0.14 grammes.
Where is carbonic acid located?Blood as in human contains carbonic acid. It is created in the woman's skin when water and carbon dioxide dissolve. Additionally, it may be found in erythrocytes, sulphur layers, salts, caverns, calcite, fermentation, coal, freshwater, meteorites, volcanoes, amino acids, and proteins.
From the given information;
pKa1 for H₂CO₃(carbonic acid) at body temperature is 6.1
HCO3 in normal blood plasma equals 0.024 M
H₂CO₃ in normal blood plasma is 0.0012 M
Bicarbonate ions and hydronium ions are created when carbonic acid dissociates in water.
[tex]\mathrm{H}_2 \mathrm{CO}_{3(\mathrm{aq})}+\mathrm{H}_2 \mathrm{O} \rightarrow \mathrm{H}_2 \mathrm{CO}_3^{-}(\mathrm{aq})+\mathrm{H}_3 \mathrm{O}_{(\mathrm{aq})}^{+}[/tex]
By applying Henderson equation;
[tex]\begin{aligned}& \mathrm{pH}=\mathrm{pKa}_1+\log \frac{\left[\mathrm{HCO}_3^{-}\right]}{\left[\mathrm{H}_2 \mathrm{CO}_3\right]} \\& \mathrm{pH}=6.1+\log \frac{[0.024]}{[0.0012]} \\& \mathrm{pH}=6.1+1.30 \\& \mathrm{pH} \text { of blood plasma }=7.4\end{aligned}[/tex]
B). Assuming that (x) is the number of HCl that also was added based on the question, the salt interacts once more to form carbonic acid.
Using the Henderson-Hasselbalch equation as a guide:
[tex]\begin{aligned}& \mathrm{pH}=\mathrm{pK} \mathbf{a}_1+\log \frac{[\text { salt }]}{[\text { acid }]} \\& 7=6.1+\log \frac{[0.024 \times 5-\mathrm{x}]}{[0.0012 \times 5+\mathrm{x}]} \\& 0.9=\log \frac{[0.024 \times 5-\mathrm{x}]}{[0.0012 \times 5+\mathrm{x}]}\end{aligned}[/tex]
Using logarithm rules;
[tex]\begin{aligned}& 10^{0.9}=\frac{[0.024 \times 5-x]}{[0.0012 \times 5+x]} \\& 7.94=\frac{[0.024 \times 5-x]}{[0.0012 \times 5+x]} \\& 7.94=\frac{[0.12-x]}{[0.006+x]}\end{aligned}[/tex]
(0.12 - x) = 7.94(0.006 + x)
0.12 - x = 0.04764 + 7.94x
0.12 - 0.04764 = 7.94x +x
0.07236 = 8.94x
x = 0.07236/8.94
x = 0.008 moles
Recall that:
number of moles = mass/molar mass
molar mass of HCl is equal to the amount of moles of HCl.
mass of HCl = 0.008 moles × 36.5 g/mol
mass of HCl = 0.3 grams
C). Used this 5.0 L of body that a typical adult human possesses in part B, it is possible to estimate the number of milligrams of the buffer component as follows:
[tex]\begin{aligned}& \mathrm{n}_{\mathrm{HClO}_3^{-}}=5 \mathrm{~L}(0.024 \mathrm{~mol} / \mathrm{L}) \\& \mathrm{n}_{\mathrm{HClO}_3^{-}}=0.12 \mathrm{~mol} \\& \mathrm{n}_{\mathrm{H}_2 \mathrm{CO}_3}=5 \mathrm{~L}(0.0012 \mathrm{~mol} / \mathrm{L}) \\& \mathrm{n}_{\mathrm{H}_2 \mathrm{CO}_3}=0.0060 \mathrm{~mol}\end{aligned}[/tex]
Suppose, (x) moles of NaOH could be neutralized by H₂CO₃;
Then, at equilibrium:
[tex]\begin{aligned}\mathrm{n}_{\mathrm{HClO}_3^{-}} & =0.12+\mathrm{x} \\\mathrm{n}_{\mathrm{H}_2 \mathrm{CO}_3} & =0.0060-\mathrm{x}\end{aligned}[/tex]
By the application of the Henderson-Hasselbalch equation:
[tex]\begin{aligned}& \mathrm{pH}=\mathrm{pKa}_1+\log \frac{\left[\mathrm{HCO}_3^{-}\right]}{\left[\mathrm{H}_2 \mathrm{CO}_3\right]} \\& 7.4=6.1+\log \frac{0.12+\mathrm{x}}{0.0060-\mathrm{x}}\end{aligned}[/tex]
Making (x) the subject of the form
[tex]\begin{aligned}& 1.3=\log \frac{0.12+x}{0.0060-x} \\& x=0.0035 \text { moles }\end{aligned}[/tex]
Recall that:
number of moles = mass/molar mass
For NaOH,
mass = number of moles of NaOH × molar mass
mass of NaOH = (0.0035 moles × 40 g/mol )
mass of NaOH = 0.14 g
Thus, we may deduce that the blood plasma's pH is 7.4, its HCl content is 0.3 grammes, and its NaOH content is 0.14 grammes.
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