Answers
The ground state orbital configuration of the nitrogen atom is represented by option C
What is the electron configuration?We define the electron configuration of an element as the way and manner in which the electrons that can be found in the atoms of the element are arranged. We have to note that the orbitals that are in the atom are at different energy levels. The orbitals that are closest to the nucleus are the orbitals that are at the lowest energy levels. As we move outwards towards the outermost shells, the energy of the electrons would continue to increase.
The ground state is the lowest energy state of the atom. This is the energy state where the energy of the atom is at its lowest point. The other higher energy states of the atom a re called the excited states of the atom.
The ground state electron configuration of the nitrogen atom is written as; [tex]1s^2 2s^2 2p^3[/tex].
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Related Questions
Diamond and graphite are two crystalline forms of carbon. At 1 atm and 25°C, diamond changes to
graphite so slowly that the enthalpy change of the process must be obtained indirectly. Determine A
Hrxn for
C(diamond)
C(graphite)
with equations from the following list:
(1) C(diamond) + O₂(g) → CO₂(g)
(2) 2 CO₂(g) → 2 CO(g) + O₂(g)
(3) C(graphite) + O₂(g) → CO₂(g)
(4) 2 CO(g) → C(graphite) + CO₂(g)
AHoverall
KJ
AH = -395.4 kJ
AH= 566.0 kJ
AH=-393.5 kJ
AH = -172.5 kJ
Answers
The ΔH of the reaction for the formation of graphite from diamond is equal to -1.9 KJ/mol.
What is the heat of the formation of the reaction?The heat of formation can be described as the amount of heat absorbed or evolved when 1 mole of a substance is formed from its constituent elements, each substance being in its normal physical state.
We have to rearrange the provided equations in a way in which all molecules of O₂ and CO₂ can be eliminated:
2C (diamond) + 2O₂ (g) → 2CO₂ (g) ΔH₁= 2 × (-395.4 KJ)
2 CO₂ (g) → 2 CO(g) + O₂(g) ΔH₂ = 566.0 KJ
CO₂(g) → C (graphite) + O₂(g) ΔH₃= - 1 × (-393.5 KJ)
2CO (g) → C (graphite) + CO₂(g) ΔH₄= -172.5 KJ
When we eliminate the molecules that appear both in reactants and products, the total chemical reaction is the following:
2C (diamond) → 2C (graphite)
ΔH (total) = ΔH₁ + ΔH₂ + ΔH₃ + ΔH₄
ΔH (total) = 2 × (-395.4 KJ) + 566.0 KJ + (-1 × (-393.5 KJ)) - 172.5 KJ
ΔH (total) = 347.2 KJ
This is for 2 mol of C (diamond) which is converted into 2 mol of C (graphite). To find ΔH for the reaction of 1 mol C (diamond) to 1 mol (graphite) we have to divide it into 2:
ΔH = - 3.8/2 = -1.9 KJ/mol
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how do oxygen molecules interact differently with the systems and cells when you have asthma?
Answers
Answer:
In individuals with asthma, the airways (bronchial tubes) that carry air in and out of the lungs become narrowed, swollen, and inflamed due to an overactive immune response. This can lead to difficulty breathing, wheezing, coughing, and other symptoms.
During an asthma attack, the muscles around the airways may become tight and the lining of the airways may produce excessive mucus, further narrowing the airways and making it difficult for oxygen to reach the cells in the body. This can lead to low oxygen levels in the blood and cause symptoms such as shortness of breath and chest tightness.
In addition to these physical changes in the airways, individuals with asthma may also have an overactive immune response to certain triggers, such as allergens or irritants, which can further worsen inflammation and airway narrowing.
Treatment for asthma typically involves using medications to control inflammation and relax the muscles around the airways, as well as avoiding triggers that can worsen symptoms. By properly managing their asthma, individuals with the condition can often lead normal, active lives.
Explanation:
The tubes that carry air into and out of the lungs become irritated and constricted in people with asthma. This can make it difficult for air to enter and exit the lungs, which can cause symptoms including coughing, wheezing, and breathing problems.
Being less able to enter the lungs and reach the body's cells is one-way oxygen molecules can interact differently with the systems and cells in people with asthma. It is more difficult for oxygen to enter the lungs when the airways are constricted, which can result in a reduction in the amount of oxygen reaching the body's cells. This may cause symptoms including trouble breathing and difficulty engaging in physical activity.
In people with asthma, oxygen molecules can also affect the cells and systems in different ways by inducing an immunological reaction. When allergens or pollutants are breathed by asthmatic patients, their immune systems may be overly sensitive to them and may respond inappropriately. This may result in the release of inflammatory substances, which may further constrict the airways and hinder the absorption of oxygen by the lungs.
Inflammation and immune system overactivity can generally disrupt how oxygen molecules interact with the body's processes and cells in people with asthma, which can cause breathing problems and other symptoms.
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the decomposition of h2o2 is represented by the equation above. the reactuin us thermodynamically favorable
Answers
The decomposition of H2O2 is represented by the equation above. the reaction us thermodynamically favorable 4H₂O₂ → 4H₂O + 2O₂
The following diagram illustrates how hydrogen peroxide decomposes chemically;
2H₂O₂ → 2H₂O + O₂
As a result, one oxygen molecule and two water molecules result from the breakdown of two hydrogen peroxide molecules.
Numerous chemical substances spontaneously react with molecular oxygen to produce peroxides in the form of free radicals.
Given that there are four hydrogen peroxide molecules breaking down in the diagram, we have;
4H₂O₂ → 4H₂O + 2O₂
The results of the breakdown of the four molecules of hydrogen peroxide are depicted in the accompanying diagram.
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please name and briefly describe 2 remedies a seller has under the ucc when the buyer has breached and the seller still possesses the goods.
Answers
2 remedies a seller has under the UCC when the buyer has breached and the seller still possesses the goods are that he can cancel the contract or withhold the delivery.
By contract, what did you mean?
An agreement between parties that establishes legal duties for both parties is known as a contract. Mutual consent, demonstrated by a valid offer and acceptance, sufficient consideration, capability, and legality are the fundamental components needed for the agreement to be a legally enforceable contract.
Contract with example: What is it?
A commitment made by one party to another that they will or won't take a particular action in the future. As an illustration, I'll offer you $3,500 to buy your car. An acceptance.
Therefore, it usually reflects the conditions of the offer—an indication, through speech or action, that both parties accept the terms of the contract.
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of cream at are added to an insulated cup containing of coffee at . calculate the equilibrium temperature of the coffee. you may assume no heat is lost to the cup or surroundings, and that any physical properties of cream and coffee you need are the same as those of water. be sure your answer has significant digits.
Answers
2H2 + O2 → 2H2O In an equation, certain substances are elements and others are compounds. Hydrogen and oxygen are elements and water is a compound in the equation above.
Water is actually created by a little more difficult reaction: 2H2 + O2 = 2H2O + Energy. The equation reads as follows in English: Two molecules of diatomic hydrogen (H2) must interact with one molecule of diatomic oxygen to form two molecules of water (H2O) (O2). The reaction is an illustration of hydrogen oxidation. The term "redox reaction" refers to a process where one species is reduced and another is oxidized. This is a redox reaction because hydrogen is being oxidized while oxygen is being reduced.
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if a copper bearing material 40 gram yeilds 5 gram of cuo the percentage of copper is
Answers
Answer:
12.5%
Explanation:
5÷40*100 = 12.5000000000000000000%
structure of quartz
each Si atom is in a tetrahedron surrounded by four O atoms and each O atom is a bridge connecting the corners of two tetrahedrons.
Answers
In Quartz, (SiO2), also known as the silica body, each Si atom is in a tetrahedron surrounded by four O atoms and each O atom is a bridge connecting the corners of two tetrahedrons.
Silicon dioxide, often known as silica, is an oxide of silicon that is most frequently found in nature as quartz and in a variety of living things. Its chemical formula is SiO2. In various parts of the world, silica makes up the majority of the sand. Silica is one of the most varied and prevalent families of materials, and it can be found both naturally and artificially. Some notable examples include fused quartz, fumed silica, silica gel, opal, and aerogels. It is used as an electrical insulator in the food, pharmaceutical, structural, microelectronic, and other industries. In the great majority of silicates, the silicon atom exhibits tetrahedral coordination, with four oxygen atoms around the central Si atom (see 3-D Unit Cell). SiO2 produces 3-dimensional network solids with tetrahedral covalent connections connecting each silicon atom to 4 oxygen atoms as a result. In contrast, CO2 is a linear molecule. The double bond rule is illustrated by the striking structural differences between carbon and silicon dioxides.
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which of the following statements, i-iv, is/are true about the galvanic cell below? cu (s) | cu2 (aq) || ag (aq) | ag (s) given the following information:
Answers
There are constantly spontaneous oxidation-reduction events in galvanic cells. "H (2)" has a stronger propensity to liberate electrons in electrochemical cells.
H (2) is thus released at the anode, and Cu is deposited at the cathode. Here, Cu serves as the cathode and Ag as the anode. Similar to oxidation, when electrons are released from an electrode they produce aqueous ions in the solution, which reduces the mass of the electrode. A galvanic cell or voltaic cell is an electrochemical device that transforms the chemical energy of spontaneous redox reactions into electrical energy. electrical cell A voltaic cell is an electrochemical device that produces electricity through chemical processes.
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Determine the structure of C6H10, which upon oxidation gives acetic and isobutyric acid
Answers
Answer:CH
3
CH
2
CH
2
C≡C−CH
3
Explanation:
1. Chromium, Cr, has 24 electrons. Write out the entire electron configuration for chromium using spdf notation.2. How many unpaired electrons would you expect for chromium in [Cr(H2O)6] 3+? Is this a paramagnetic or diamagnetic material?3. Cobalt, Co, has 27 electrons. Write out the entire electron configuration for cobalt using spdf notation.4. How many unpaired electrons would you expect for manganese in KMnO4? Is this a paramagnetic or diamagnetic material?5. This same experiment is performed on the international space station. What is the primary issue with performing this experiment in the absence of gravity? Design an experiment to compensate for this. As always, you do have duct tape.
Answers
2)You would expect six unpaired electrons for chromium in [Cr(H2O)6] 3+. This material is paramagnetic because it contains unpaired electrons.
3)The electron configuration for cobalt using spdf notation is [Ar] 3d7 4s2.
4)You would expect two unpaired electrons for manganese in KMnO4. This material is paramagnetic because it contains unpaired electrons.
5)One of the primary issues with performing experiments in the absence of gravity is that materials may behave differently due to the lack of gravitational forces. To compensate for this, you could design an experiment that uses a centrifuge to simulate gravity. For example, you could use duct tape to secure the materials and equipment to the walls of the centrifuge and spin it at a high enough speed to create artificial gravity. This would allow you to study the materials and observe their behavior under conditions similar to those on Earth.
Please can you give me brainliest
The electronic configuration is also used to explain the orbitals of an atom and it helps to determine the physical and chemical properties of the elements. Here the electronic configuration of chromium is 1s²2s²2p⁶3s²3p⁶4s¹3d⁵.
What is electronic configuration?The distribution of electrons in the atomic orbitals is given by the electronic configuration. It is a standard notation in which all the electrons holding atomic subshells are arranged in a sequence. Each element has a unique electronic configuration.
The electronic configuration of an element can be written in two ways, in standard notation, and in condensed form. In the case of elements with larger atomic numbers, the electronic configuration becomes lengthy in standard notation. So in such cases condensed form is generally used.
In condensed form, Cr: [Ar] 3d⁵4s¹
There are six unpaired electrons in [Cr(H₂O)₆]³⁺ and it is a paramagnetic complex.
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with reference to compound a below, label each compound as an identical molecule, an isomer, a resonance structure, or neither.
Answers
Label for each of the compounds given in the question are: 1) Isomer, 2) Isomer, 3) Resonance Structure, 4) Isomer 5) Neither.
A group of two or more Lewis structures known as resonance structures describe the electronic bonding of a single polyatomic species, including fractional bonds and fractional charges. The number of electrons in resonance structures should be constant; do not add or subtract any electrons. (Count the electrons to determine their number). Every resonance structure complies with the standards for writing Lewis Structures. Structure hybridization must be constant. By cyclically moving elections, it is possible to depict the two resonance configurations of the benzene ring. Multiple resonance structures can be found in conjugated double bonds.
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In a gas chromatogram, the retention time of compounds A and B are 1.25 min and 1.45 min, respectively. If both of these compounds have similar structures, which of the compounds has a higher boiling point?
Answers
In a gas chromatogram, the retention time of compounds A and B are 1.25 min and 1.45 min, respectively. If both of these compounds have similar structures, Compound A has a higher boiling point.
Gas chromatogram is a widely used technique in analytical chemistry for the separation and investigation of compounds that may evaporate without disintegrating (GC). The purity of a substance can be assessed by GC, as can the components of a mixture. Preparative chromatography can make use of GC to separate pure compounds from a mixture. Other names for gas chromatography include vapor-phase chromatography (VPC) and gas-liquid partition chromatography (GLPC). These alternative names and the accompanying acronyms are frequently used in scientific literature. Gas chromatography is a technique for separating compounds in mixtures by injecting a gaseous or liquid sample into a mobile phase, which is usually referred to as the carrier gas, and passing the gas through a stationary phase. The mobile phase is often composed of an inert gas or an unreactive gas, such as helium, argon, nitrogen, or hydrogen. The stationary phase is a minuscule layer of viscous liquid on a surface of solid particles on an inert solid support in a piece of glass or metal tubing known as a column.
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Helen goes to the doctor and has a thyroid test done. She receives 20 grams of radioactive iodine. After 8 hours, 10 grams of the iodine have broken down. After 16 hours, there are 5 grams of iodine left.
What is the half-life of the radioactive iodine?
8 hours
Answers
8 hours is the half-life of the radioactive iodine. The entire body is exposed to radiation risks from gamma rays. They can swiftly get through defences that alpha and beta particles can stop.
Like skin and clothing. Because of their powerful penetrating power, gamma rays may require several inches of a heavy substance, like lead, or even several feet of concrete, to be stopped. During radioactive decay, an atom's nucleus may emit gamma rays. They can easily penetrate the human body and travel tens of yards or more through the air. It takes a radioactive heavy, dense material, such several inches of lead or concrete, to shield this particularly penetrating form of ionising radiation.
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How many compounds, of the ones listed below, have hydrogen bonding?CH3CH2CH2NH2 CH3CH2NHCH2CH3 (CH3CH2)2NCH2CH32130
Answers
Since CH3CH2CH2NH2 may form intermolecular hydrogen bonds, it has a higher boiling point than other compounds. The hydrogen atoms in (CH3)3N (C H 3) 3 N are joined to the carbon atoms.
Since carbon is not a particularly electronegative atom, it cannot donate hydrogen. There aren't any hydrogen atoms to accept, despite the fact that nitrogen is a strong hydrogen atoms. As a result, CH3CH2CH2CH3 is a nonpolar molecular complex in which induced dipole forces are the only intermolecular forces. When both the donor atom, D, and the acceptor atom, A, are among the highly electronegative elements O, N, or F, hydrogen bonding occurs, as shown by the symbol D-H—-A.
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Epinephrine is a hormone secreted into the bloodstream in times of danger and stress. It is 59% Carbon, 7.1% Hydrogen, 26.2% Oxygen and 7.7% Nitrogen by mass. Determine the empirical formula. The molar mass is 148 g/mol.
Answers
Based o the percentage masses of the elements, the empirical formula of epinephrine is C₉H₁₃O₃N.
What is the empirical formula of epinephrine?The empirical formula of epinephrine is calculated below as follow:
Mole ratio of the elements are determined:
Carbon = 59% / 12
Carbon = 0.049 moles
Hydrogen = 7.1% / 1
Hydrogen = 0.07 moles
Oxygen = 26.2% / 16
Oxygen = 0.016
Nitrogen = 7.7% / 14
Nitrogen = 0.0055
The simplest whole-number ratio will be:
C = 0.049/0.0055
C = 9
Hydrogen = 0.07/0.0055
H = 13
Oxygen = 0.016/0.0055
Oxygen = 3
Nitrogen = 0.0055/0.0055
Nitrogen = 1
The empirical formula = C₉H₁₃O₃N
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Searching for the perfect artificial sweetener--great taste with no Calories--has been the focus of chemical research for some time. Molecules such as sucralose, aspartamine, and saccharin owe their sweetness to their size and shape. One theory holds that any sweetener must have three sites that fit into the proper taste buds on the tongue. This theory is appropriately known as the triangle theory. Research 3 artificial sweeteners to develop a model to show how the triangle theory operates.
Answers
There are two types of chemical compound one is covalent compound and other is ionic compound, covalent compound formed by sharing of electron and ionic compound formed by complete transfer of electron. Therefore, one theory holds that any sweetener is triangle theory.
What is chemical Compound?Chemical Compound is a combination of molecule, Molecule forms by combination of element and element forms by combination of atoms in fixed proportion.
An ionic compound is a metal and nonmetal combined compound. Ionic compound are very hard. They have high melting and boiling point because of strong ion bond. Sweetness is a taste sensation that only requires interaction with receptors on our tongues.
Therefore, one theory holds that any sweetener is triangle theory.
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Isobars are an important feature shown on weather maps. They join up points which have equal values of.
Answers
Isobars are lines that join up points that have equal values of atmospheric pressure.
What are isobars?Isobars are lines that connect locations or points with the same atmospheric pressure on maps. The points are connected with respect to the time or the weekly, monthly, or yearly average of atmospheric pressure.
Isobars on maps play important role in the location of areas with low or high pressure and can inform us about the condition of a place over time as far as the atmospheric pressure is concerned.
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given the reaction: 234 91 pa x 0 -1e when the equation is correctly balanced the nucleus represented by x is
Answers
The reaction is given : ²³⁴Pa₉₁ -----> X + ⁰e₋₁ , the equation is balanced and the nucleus represented by X is ²³⁴U₉₂.
The balanced reaction is given as :
²³⁴Pa₉₁ -----> X + ⁰e₋₁
This reaction is the balanced reaction and X is represented the nucleus and is given as : ²³⁴U₉₂.
The given reaction is the nuclear reaction. the nuclear reaction is the reaction in which the nuclides are produced by the collision between the two atoms nuclei. the nuclear reaction are of the two types the nuclear fission and the nuclear fusion reaction. the nuclear fission is the splitting of the large nuclei in to the smaller ones.
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a molecule with 5 single bonds (and any number of lone pairs) could have which type of molecular geometry? i. trigonal bipyramidal ii. seesaw iii. t-shaped iv. square pyramidal
Answers
Which type of arrangement of atoms could a molecule with five covalent bond (and any percentage of lone pairs) have? Trigonal bipyramidal, square pyramidal
A cell is the smallest unit of a material that retains its composition and properties. It is made up of 2 or more atoms that are joined together by covalent bond. Chemistry is built on molecules. The element sign and a suffix indicating the number of ions are used to identify molecules. A molecule is the smallest unit of any material that is composed of one or more elements and is capable of existing independently while maintaining all of the substance's physical and chemical properties. Further atom division occurs within molecules. For instance, the symbols for the oxygen atom and molecule are O and O2, respectively.
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The formation of sodium chloride from sodium and chlorine is an
example of a simple Redox reaction. This reaction is displayed
below.
2Na(s) + Cl2(g) → 2NaCl(s)
Explain (with reference to changes in oxidation states) why this
is a Redox reaction and again with reference to it, explain what
is meant by the terms ‘reducing agent’ and ‘oxidising agent’.
Answers
The sodium is oxidized while the chlorine atom is reduced from the equation.
What is a redox reaction?We know that a redox reaction is the kind of reaction that involves the change in the oxidation number of a substance. The oxidation number is the magnitude of the charge that a specie appears to have. In this case, we can see that the reaction that has been shown here has to do with a change in the oxidation number of the species that are involved in the reaction from left to right.
We can see that on the right hand side, the sodium and chlorine are both in an oxidation state of zero. If we move to the right hand side, the oxidation number of the sodium can be seen to haver increased to +1 while the oxidation n umber of the chlorine can be seen to have been decreased to - 1.
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. What happens when metals react with water?
Answers
Answer:
Metals react with water to form oxides or hydroxides and release Hydrogen gas
Explanation:
How many oxygen atoms are there in 3.45 grams of H2O?
Answers
According to the concept of Avogadro's number, there are 1.298×10²³ atoms in 3.45 grams of H₂O.
What is Avogadro's number?Avogadro's number is defined as a proportionality factor which relates number of constituent particles with the amount of substance which is present in the sample.
It has a SI unit of reciprocal mole whose numeric value is expressed in reciprocal mole which is a dimensionless number and is called as Avogadro's constant.It relates the volume of a substance with it's average volume occupied by one of it's particles .
According to the definitions, Avogadro's number depend on determined value of mass of one atom of those elements.It bridges the gap between macroscopic and microscopic world by relating amount of substance with number of particles.
Number of atoms can be calculated using Avogadro's number as follows: mass/molar mass×Avogadro's number
Substituting mass and molar mass of oxygen in above formula, number of atoms=3.45/16×6.023×10²³=1.298×10²³ atoms.
Thus , there are 1.298×10²³ atoms in 3.45 grams of H₂O.
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Identify the options below that are results of decreasing the temperature of a system that includes an exothermic reaction in the forward direction. A. The concentration of the reactants increases. B. The concentration of the products increases. C. The equilibrium constant decreases. D. The equilibrium shifts toward the products.
Answers
If the reaction is exothermic as described, a rise in temperature will thus trigger the opposite reaction, which will result in a decrease in the amount of the products and an increase in the number of reactants. The reverse outcome will occur if the temperature is lowered.
B. The concentration of the products increases.
A reaction is defined as exothermic if the overall standard enthalpy change (H) is negative. Exothermic processes typically produce heat. Exergonic reaction, which the IUPAC defines as "... a reaction for which the overall standard Gibbs energy change G is negative," is frequently mistaken with the phrase.
Because "H" contributes significantly to "G," a strongly exothermic process is typically also exergonic. Exothermic and exergonic chemical reactions make up the majority of the impressive demonstrations in schools.
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the use of chlorine to bleach cotton fibers replaced the standard methods that included using buttermilk to whiten the fibers. T/F
Answers
True; The use of chlorine to bleach cotton fibers replaced the standard methods that included using buttermilk to whiten the fibers.
The formulations of pool-grade chlorine, which you can typically purchase in pills, granules, or as a liquid, typically range in chlorine content from 65% to almost 100%. The name hypochlorous acid refers to pure chlorine.
The most widely used form of pool-grade chlorine is calcium hypochlorite, which is typically on the lower end of the concentration spectrum and comes in the form of granules or tablets. Trichloro-s-triazinetrione, or tri-chlor, is a common ingredient in tablet-based medications. When dissolved in pool water, a tri-chlor pill can produce about 100% pure chlorine.
Like Clorox, bleach in a container contains primarily water. About 95% of the bleach in your jug won't do anything to help clean your pool because it only contains 5% to 6% sodium hypochlorite. There are several bleach formulations that may contain perfumes and colors.
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need part 3!! the following answers have been wrong: -42.12, -179.3, 30.514, -42.46, 60.8, -66.40, 777.614
Answers
The maximum amount of work produced by the cell is 0.31 coulombs, or 310 joules.
What is work?Work in physics is the transfer of energy from one object to another. It can be described as a force acting on an object over a distance, resulting in a change of energy of the object. Work is typically measured in joules (J). Work can be done by an applied force either pushing or pulling on an object to cause a displacement, or by a force causing a rotation or a change in the object’s shape. Work can also be done by gravity, in which an object is moved along the direction of a gravitational field. In all cases, work results in the object experiencing a change in energy.
The maximum amount of work produced by the cell can be calculated using the Nernst equation. The Nernst equation is used to calculate the voltage of a cell, and the amount of work produced by the cell is equal to the voltage multiplied by the total charge that passes through the cell.
The Nernst equation is given by:
E = E° - (RT/nF) ln Q
Where E is the voltage of the cell, E° is the standard potential of the cell, R is the ideal gas constant, T is the temperature in Kelvin, n is the number of electrons transferred in the reaction, F is the Faraday constant and Q is the reaction quotient.
For the given reaction, the standard potential is 0.77 V, the number of electrons transferred is 2, and the reaction quotient is the product of the partial pressure of oxygen and the activity of Fe2+, which is given by:
Q = (0.203 atm)(0.0745 M) = 0.01514
Therefore, the voltage of the cell is given by:
E = 0.77 - (8.314 J/molK)(298 K)/(2)(96485 C/mol) ln 0.01514 = 0.31 V
The maximum amount of work produced by the cell can then be calculated as the voltage multiplied by the total charge that passes through the cell. Assuming that the total charge is 1 coulomb, the maximum amount of work produced by the cell is 0.31 coulombs, or 310 joules.
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List the numbers and types of atoms represented by these chemical formulas.a.Fe2O3b.KMnO4c.CH3d.NH4NO3
Answers
a. Fe2O3 - two iron atoms and three oxygen atoms.
b. KMnO4 - one potassium atom, one manganese atom, and four oxygen atoms.
c. CH3 - one carbon atom and three hydrogen atoms.
d. NH4NO3 - one nitrogen atom, four hydrogen atoms, and three oxygen atoms.
In chemistry, a chemical formula is a way of representing compounds using the symbols of the elements that make up the compound. Elements are represented by atomic symbols, and the number of atoms in each element is indicated by a number after the atomic symbol.
Fe2O3 - This chemical formula describes a compound called iron oxide, also known as hematite. "Fe" stands for iron, and "2" and "3" indicate that there are two iron atoms and three oxygen atoms in the compound.
KMnO4 - This chemical formula represents a compound called potassium permanganate. "K" is potassium, "Mn" is manganese, and "O4" indicates that the compound has four oxygen atoms.
CH3 - This chemical formula represents a compound called methane. "C" stands for carbon and "H3" indicates that the compound contains three hydrogen atoms.
NH4NO3 - This chemical formula represents a compound called ammonium nitrate. "N" stands for nitrogen, "H4" indicates that there are four hydrogen atoms, and "O3" indicates that the compound has three oxygen atoms.
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Voltaic cells are able to provide energy in the form of electricity because the potentials of their redox reactions permit electrons to flow
spontaneously.
true or false
Answers
Answer: True. Voltaic cells, also known as galvanic cells, are able to provide energy in the form of electricity because the potentials of their redox reactions permit electrons to flow spontaneously. Redox reactions involve the transfer of electrons from one species to another, and the flow of electrons through a circuit can be used to do work, such as powering an electric motor or a lightbulb. The potential difference between the two half-cells in a voltaic cell is called the cell potential, and it determines the direction and magnitude of the flow of electrons.
Explanation:
Which of the following statements is a correct interpretation of the data regarding how the order of the reaction can be determined?
a. The reaction must be first order because there is only one reactant species
b. The reaction is first order if the plot of ln[H2O2] vs time is a straight line
c. The reaction is first order if the plot of 1/[H2O2] vs time is a straight line
d. The reaction is second order because 2 is the coefficient of H2O2 in the chemical equation
Answer: B
Answers
The reaction is first order if the plot of ln[H₂O₂] vs time is a straight line. Therefore, option B is correct.
What is the order of the reaction?The order of reaction can be described as the relationship between the rate of a reaction and the concentration of the species that participated in it. In order to get the reaction order, the rate expression of the reaction must be obtained.
The rates of reactions depend on the concentration of only one reactant can be considered as the first order of the reaction. In these reactions, there can be multiple reactants present, but only one reactant can be of first-order concentration.
An example of a first-order reaction can be : [tex]2H_2O_2 \longrightarrow 2H_2O + O_2[/tex]
The plot between the ln[H₂O₂] vs time will be a straight line.
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What mass of silver will be precipitated when 5.0g of copper are reacted with
excess of silver nitrate solution?
Cu(s) + 2AgNO3(aq) → Cu(NO3)₂(aq) + 2Ag(s)
Answers
As per the given balanced reaction, one mole or 63.5 g of Cu produces 2 moles or 215.6 g of silver metal. Hence, 5 g of copper produces16.9 g of Ag.
What is displacement reaction?A displacement reaction is a type of reaction, in which one element or group of the reactant is displaced by the attacking group or element. The reaction between copper and silver nitrate is an example of single displacement reaction.
Given the balanced equation of the reaction. One mole of Cu produces 2 moles of Ag.
atomic mass of Cu = 63.5 g/mol
atomic mass of Ag = 107.8 g/mol
mass 2 moles of Ag = 2 × 107.8 =215.6 g.
Hence, 63.5 g of Cu produces 215.6 g of Ag.
The mass of Ag produced by 5 g of Cu is calculated as follows:
mass of Ag = (5 × 215.6 g) /63.5 g = 16.9 g
Therefore, the mass of silver precipitated will be 16.9 g.
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a compion whose molecules consist of c h and o was founnd to contain 62.04 c and 10.41 h and 2755 o give the emperical formula
Answers
The empirical formula of the compound is C3H6O
Number moles of carbon nc = 62.04/12 = 5.17
Number of moles of hydrogen nH = 10.41/1 = 10.41
Number of moles of Oxygen no = 27.55/16 = 1.72
Divide the number of moles by 1.72
nc = 5.17/1.72 = 3
nH = 10.41/1.72 = 6.05
no = 1.72/1.72 = 1
The empirical formula of the compound is C3H6O
The most straightforward whole number ratio of atoms in a compound is its empirical formula. The empirical formula of sulfur monoxide, abbreviated SO, and disulfuric dioxide, abbreviated S2O2, are two straightforward examples of this idea. As a result, the empirical formula for sulfur monoxide and disulfur dioxide, two compounds made of sulfur and oxygen, is the same. Their molecular formulae, which represent how many atoms are present in each molecule of a chemical compound, are different.
The number of atoms or their arrangement are not mentioned in an empirical formula. Many ionic chemicals, such calcium chloride (CaCl2), and macromolecules, like silicon dioxide, adhere to this criterion (SiO2)
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