The statements given in 1 and 3 are true about Buffer solutions.
Statement 1:
A buffer solution can be made by mixing equal concentrations of acetic acid and sodium acetate because in buffer solutions strong base should be less. Hence, here acetic acid is the weak acid and sodium acetate is the corresponding salt.
Statement 2:
A buffer solution can be made by mixing equal concentrations of hydrochloric acid and sodium chloride, this statement is false because no buffer solution can be made from strong acid like HCl.
Statement 3:
A buffer solution resists changes in pH when small quantities of acid or base are added to the solution and this is true.
Hence, the correct statements are 1 and 3.
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g which cofactor participates directly in most of the oxidation-reduction reactions in the fermentation of glucose to lactate?
NAD+/NADH is the cofactor that participates directly in most of the oxidation-reduction reactions in the fermentation of glucose.
A chemical reaction is a method wherein one or more materials, also called reactants, are transformed into at least one or more special substances, called merchandise. Materials are both chemical elements or compounds.
A few synthesis reactions can result in more than one product. Photosynthesis is one of the maximum important chemical reactions on earth.
Chemical compounds are made from atoms of different elements, joined collectively through chemical bonds. A chemical synthesis normally involves the breaking of existing bonds and the formation of recent ones.
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If the density of carbon tetrachloride is 0. 793 g/ml, and a sample has a volume of 9. 29 ml, what is the mass?.
If the density of carbon tetrachloride is 0. 793 g/ml, and a sampl.e has a volume of 9. 29 ml the mass is 7.367 g
For CCl4
Density of carbon tetrachloride = 0.793 g/ml
Volume of sample = 9.29ml
mass = density * volume = 0.793 × 9.29 = 7.367 g
The chemical name for carbon tetrachloride, sometimes referred to as tetrachloromethane and recognized by the IUPAC, carbon tet in the cleaning business, Halon-104 in firefighting, and Refrigerant-10 in HVACR, is CCl4. It is an organic compound. It has an indistinct color and a just perceptible "sweet" odor. At lower temperatures, it is almost incombustible. Prior to being phased out because to environmental and safety concerns, it was frequently used in fire extinguishers, as a predecessor to refrigerants, and as a cleaning agent. The central nervous system can be impacted as well as the liver and kidneys when exposed to high amounts of carbon tetrachloride, particularly its vapor. An extended exposure risk can be lethal.
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the balance of aluminum is 3 in the balance of chlorine is 921 the formula for aluminum chloride is correctly written as
The formula for aluminum chloride is correctly written as AlCl₃.
What is aluminum chloride?
Chemically speaking, aluminum chloride has the formula AlCl3. It frequently exhibits a yellow hue when polluted with iron chloride as opposed to the white of the pure product. Lewis bases are employed in a variety of chemical processes; the most often utilized Lewis acid is anhydrous aluminum trichloride.
Excessive perspiration can be managed with aluminum chloride (a LOO minum klor ide). Other use for this medication are possible.
Therefore, The formula for aluminum chloride is correctly written as AlCl₃.
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calculate the most probable speed of an ideal gas of molar mass 34.3 g/mol at 53.7°c. type your answer here
The most probable speed of an ideal gas of molar mass 34.3 g/mol at 53.7°c is 131735.46 m/s.
The most probable speed of gasoline molecules described through the Maxwell-Boltzmann distribution is the rate at which distribution graph reaches its most. hence, if we recognise the system of this distribution, we just need to differentiate it and take into account the by-product to be identical to zero.
The maximum probable speed is the only which informs approximately the rate possessed with the aid of the most number of molecules of the gas. The most possibly velocity is the most fee on Maxwell's distribution plot. - The common pace is the sum of the speeds of all of the molecules divided by means of the number of molecules.
Calculation:-
molar mass = 34.3 g/mol
temperature = 53.7 °C = 326.7 K
vmp=√2RTM
= 1.414 × 8.314 × 326.7 × 34.3
= 131735.46 m/s
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a bottle of perfume is dropped in the corner of a room; the scent can be detected everywhere gas law
A bottle of perfume is dropped in the corner of a room, the scent can be detected everywhere because of diffusion.
If a perfume bottle is opened in the corner at a room, the scent can be detected everywhere on the room because of the diffusion. Diffusion can be defined as the movement of the particles from the higher area to the lower concentration area.
Thus, The gas in the perfume bottle is at the higher concentration in the bottle and when we opened the bottle the gas present in the form of perfume travel from higher concentration to the lower concentration.
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If 60 g of a radioactive substance naturally decays to 15 g after 16 hours, what is the half-life of the radioisotope?.
A radioactive source's half-life is 8 hours if 60 g of it drops voluntarily to 15 g in 16 hours.
What are radioisotopes, and how are their radioactivity levels determined?
The number of protons in the atomic nuclei of the constituent atoms of a given chemical is constant, whereas the number of neutrons changes. Radioisotopes are the name for an element's radioactive constituents. They can also be referred to as unstable neutron-proton pairings or atoms with too much electrical energy in their nucleus. The Contributes to the continuing (Bq), the international unit, or the Cobalt (Ci), the official machine in the United States, are used to report actual radiation levels.
Complete life divided by half.
Half-life equals 16/2
8 hours is the half-life.
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Many organic reactions involve more than a single step. A reactive species that formed in one step and used up in the next is called a reactive _____. Such a reactive species can sometimes be isolated, even though it may be short-lived, unlike the ____ state, which is the unstable energy maximum for each step.
A reactive species that formed in one step and used up in the next is called a reactive intermediate. Such a reactive species can sometimes be isolated, even though it may be short-lived, unlike the transition state.
A certain configuration along the reaction coordinate constitutes the transition state of a chemical reaction. It is described as the condition corresponding to the maximum potential energy along this reaction coordinate. When a molecule is in a transitional state, it is neither a substrate nor a product. The transition state, an unstable structure that exists between the chemical structures of substrates and products, is the first step in every chemical transformation.
A short-lived, highly reactive molecule with high energy is known as a reactive intermediate or an intermediate. It swiftly transforms into a more stable molecule when produced in a chemical process. These chemicals can only be isolated and kept in storage under rare circumstances. Carbocation, carbanion, and the free radical are the three reactive intermediates.
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Ni(s)→Ni2+(aq)+2e−
Ag+(aq)+e−→Ag(s)
Which of the following is the balanced net ionic equation for an oxidation-reduction reaction between Ag+(aq) and Ni(s)based on the half-reactions represented above?
2Ag+(aq)+Ni(s)→2Ag(s)+Ni2+(aq)2Ag+(aq)+Ni(s)→2Ag(s)+Ni2+(aq).
Ni (s), Ni+2 (aq), and two e- As the Ni releases two electrons to form Ni+2, the Silver ion must accept two electrons to balance the net reaction, therefore two silver ions will absorb two electrons to form silver. 2 e- 2 Ag + 2 Ag+ (aq) (s).
What is Redox reaction?
Redox reactions are oxidation-reduction chemical processes in which the oxidation states of the reactants change. Redox is a shortened version of reduction-oxidation. Two distinct processes—a reduction process and an oxidation process—can be used to describe all redox reactions.
Redox or Oxidation-Reduction processes always involve simultaneous oxidation and reduction reactions. In a chemical reaction, the material that is being reduced is referred to as the reducing agent, while the substance that is being oxidized is the oxidizing agent.
A chemical process in which electrons are moved between two reactants is referred to as a redox reaction. The alteration in the oxidation states of the reacting species can be used to pinpoint this electron transfer.
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brainly a mixture of two gases with a total pressure of 5.60 atm contains 0.40 atm of gas a. what is the partial pressure of gas b?
The partial pressure of gas B is 5.2 atm.
What do you understand by partial pressure?
When more than one gas is present in a container, each gas exerts pressure, which is known as partial pressure. Its partial pressure refers to the pressure of any gas inside the container.
Let there be n different gases in the mixture, each at a different pressure (P1, P2, etc.)
Then the total pressure will be:
[tex]P_{total}[/tex] = ∑[tex]P_{1}[/tex] + [tex]P_{2}[/tex] + [tex]P_{3}[/tex]
Now, partial pressure of mixture of gas containing gas A = [tex]P_{A}[/tex]
partial pressure of mixture of gas containing gas B = [tex]P_{B}[/tex]
Total pressure of gas = 5.60 atm
Pressure of gas [tex]P_{A}[/tex] = 0.40 atm
[tex]P_{total}[/tex] = [tex]P_{A}[/tex] + [tex]P_{B}[/tex]
5.60 atm = 0.40 atm + [tex]P_{B}[/tex]
[tex]P_{B}[/tex] = 5.60 - 0.40 = 5.2 atm
So, the partial pressure of gas B is 5.2 atm.
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a is an instrument used to measure atmospheric pressure specifically in the area of meteorology.
The instrument used to measure atmospheric pressure specifically in the area of meteorology is Barometer.
A barometer is a scientific instrument used to measure atmospheric pressure, also called barometric pressure. The atmosphere is the layers of air wrapped around Earth. That air has a weight and presses against everything it touches as gravity pulls it to Earth. Barometers measure this pressure. Atmospheric pressure is an indicator of weather. Changes in the atmosphere, including changes in air pressure, affect the weather. Meteorologists use barometers to predict short-term changes in the weather. A barometer measures atmospheric pressure in units of measurement called atmospheres or bars. An atmosphere (atm) is a unit of measurement equal to the average air pressure at sea level at a temperature of 15 degrees Celsius (59 degrees Fahrenheit).
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consider the reaction below. predict which reaction type is likely to occur. a) sn1 b) sn2 c) e1 d) e2 e) no reaction
B. SN2
A chemical reaction is a method wherein one or more materials, also called reactants, are transformed into at least one or more special substances, called merchandise. Materials are both chemical elements or compounds.
A few synthesis reactions can result in more than one product. Photosynthesis is one of the maximum important chemical reactions on earth. It allows plants and a few microbes to transform water and carbon dioxide gas into storable sugar and oxygen.
Chemical compounds are made from atoms of different elements, joined collectively through chemical bonds. A chemical synthesis normally involves the breaking of existing bonds and the formation of recent ones.
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the combustion of ammonia in the prescne of excess oxygen yield no2 and h2o. how many grams of no2 are produced when 43.9mg of ammonia burn
The combustion of ammonia in the prescne of excess oxygen yield no2 and h2o. 0.119 grams of no2 are produced when 43.9mg of ammonia burn.
Molar mass of NH3 = 1*MM(N) + 3*MM(H)
= 1*14.01 + 3*1.008
= 17.034 g/mol
mass of NH3 = 0.0439 g
mol of NH3 = (mass)/(molar mass)
= 0.0439/17.034
= 2.577*10^-3 mol
From balanced chemical reaction, we see that
when 4 mol of NH3 reacts, 4 mol of NO2 is formed
mol of NO2 formed = moles of NH3
= 2.577*10^-3 mol
Molar mass of NO2 = 1*MM(N) + 2*MM(O)
= 1*14.01 + 2*16.0
= 46.01 g/mol
mass of NO2 = number of mol * molar mass
= 2.577*10^-3*46.01
= 0.119 g
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how many grams of sodium chloride are there in 550.0 ml of a 1.90 m aqueous solution of sodium chloride? question 28 options: 6.11 × 104 61.1 30.5 1.05 122
61.1 grams of sodium chloride.
Molar concentration is a unit of measurement for the concentration of a chemical species, specifically a solute, in a solution, expressed as the amount of substance per unit volume of solution. The most commonly used unit for molarity in chemistry is the number of moles per liter, denoted by the unit symbol mol/L or mol/dm³ in SI units.
Molarity (M) is the most commonly used unit of solution concentration and is defined as the amount of solute in moles divided by the volume of solution in liters:
M = moles of solute/liters of solution.
A mole is a unit of measurement for a chemical substance, from which the term "molarity" derives.
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For reaction 2 Mg +0₂ → 2 MgO, if 4.0 g Mg is reacted, how many grams O₂ is reacted?
The mass of the oxygen that has been reacted is 2.72 g.
What is stoichiometry?We know that the term stoichiometry has to do with the way that we can be able to obtain the parameter of a reaction by looking at the balanced reaction equation of the reaction as it were.
We can see from the question that the balanced chemical reaction equation can be written as; 2 Mg +0₂ → 2 MgO
Number of moles of Mg = 4.0 g/24 g/mol
= 0.17 moles
Now;
2 moles of Mg reacted with 1 mole of oxygen
0.17 moles would now react with 0.17 moles * 1 mole / 2moles
= 0.085 moles
Mass of oxygen reacted = 0.085 moles * 32 g/mol = 2.72 g
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two aqueous solutions are mixed in the calorimeter shown to determine the heat of the reaction. after measuring the change in temperature of the water bath, what equation do we use to determine the amount of heat transferred?
two aqueous solutions are mixed in the calorimeter shown to determine the heat of the reaction. after measuring the change in temperature of the water bath, the equation used is q = c*m*(change in temperature).
A calorimeter is a device used in calorimetry, a procedure for calculating heat capacity and measuring the heat of chemical processes or other physical changes. Among the most popular kinds are differential scanning calorimeters, isothermal micro calorimeters, titration calorimeters, and accelerated rate calorimeters.
It can be used to measure change on the temperature, ultimately helping in calculating heat transferred.
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N2 (g) effuses at a rate that is _________ times that of xe(g) under the same conditions.
There will be variances between isotopes, however by ignoring these and using the avg mol wt of N2 = 28 and Xe = 132; Rate(N2)/Rate(Xe) = sqrt (132/28) = 2.17
What an isotope is instead ?Isotopes are atoms with the same quantity of protons but differing numbers of neutrons. They differ in mass, which affects their physical characteristics even if they have nearly identical chemical makeup.
What makes anything an isotope?There are three known one-proton nuclei that have 0 neutrons, 1 neutrons, and 2 neutrons, respectfully. They are known as hydrogen isotopes (first from Greek isos, which means "same," and topos, which means "place") since they all occupy the same location in the periodic chart that is designated for atomic number 1.
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Write a nuclear equation to describe the spontaneous fission of 243 95am to form i-134 and mo-107. Determine how many neutrons are produced in the reaction.
Following is the nuclear equation for the spontaneous fission of ₉₅Am²⁴3 , which results in the formation of ₅₃I¹³⁴ + ₄₂Mo¹⁰⁷ and three neutrons:
₉₅ Am²⁴3 -----> ₅₃I¹³⁴ + ₄₂Mo¹⁰⁷ + 3 ₀n¹
What is neutrons?The neutron is a subatomic particle that has a neutral charge, the sign n or n0, and only a little bit more mass than a proton. The atom's nucleus is made up of protons and neutrons. All other nuclei require neutrons to remain stable, with the exception of the hydrogen atom, which has a single proton. Large numbers of neutrons are produced by both nuclear fusion and fission. They are crucial to the fission, fusion, and neutron capture processes that result in the nucleosynthesis of chemical elements in stars.
What are neutrons found in an atom?Two subatomic particles known as neutrons and protons are found in the nucleus of every atom. The only exception is hydrogen, which has one proton in its nucleus. Neutrons are somewhat heavier than positively charged protons and have an electric charge that is neither positive nor negative.
Briefing:• ₉₅ Am²⁴3 -----> ₅₃I¹³⁴ + ₄₂Mo¹⁰⁷ + 3 ₀n¹
• From the above reaction, three neutrons are produced.
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list the addition reactions of alkenes and alkynes. what similarities do you see in the addition reactions? do you notice any differences?
The list the addition reactions of alkenes and alkynes are as follows:
Addition Reactions of Alkenes:
1. Halogenation: Alkenes react with halogens to form halohydrins.
2. Hydration: Alkenes react with water to form alcohols in the presence of an acid catalyst.
3. Hydrohalogenation: Alkenes react with hydrogen halides to form alkyl halides.
4. Hydrogenation: Alkenes react with hydrogen in the presence of a metal catalyst to form alkanes.
5. Hydroboration-Oxidation: Alkenes react with borane to form alcohols.
Addition Reactions of Alkynes:
1. Halogenation: Alkynes react with halogens to form dihalides.
2. Hydration: Alkynes react with water to form ketones in the presence of an acid catalyst.
3. Hydrohalogenation: Alkynes react with hydrogen halides to form alkyl halides.
4. Hydrogenation: Alkynes react with hydrogen in the presence of a metal catalyst to form alkanes.
5. Hydroboration-Oxidation: Alkynes react with borane to form aldehydes.
Similarities: Both alkenes and alkynes undergo the same types of addition reactions.
Differences: The products of the addition reactions are different depending on the type of compound being reacted. For example, alkenes form alcohols when reacted with water, while alkynes form ketones.
What do you mean by Alkynes?
Alkynes are a group of hydrocarbons that contain at least one triple bond between two carbon atoms. They are also known as acetylenes and are unsaturated hydrocarbons with the general chemical formula of CnH2n-2.
What do you mean by Alkenes?
Alkenes are a class of hydrocarbons characterized by a carbon–carbon double bond. They are typically colorless, flammable, gases or liquids with a sweet odor. Alkenes are a major component of gasoline and are used in the manufacture of plastics and other industrial materials.
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apollo spas services 297 hot tubs. if each hot tub needs 115 ml of muriatic acid, how many liters of acid are needed for all of the hot tubs?
The number of liters of acid needed for all of the hot tubs is the total volume of muriatic acid, which is 31, 155 ml.
Volume refers to the space occupied within the boundaries of an object in three-dimensional space. It is also called as the capacity of the object. In an object is filled with a liquid complete, there volume is the same.
In the given case that total volume of the acid would be the product of volume of each hot tub and number of hot tub containers. Hence, it is given by:
Total volume = Volume of each hot tub x number of hot tub containers
According to the given data:
Volume of each hot tub = 115 ml
Number of hot tub containers = 297
Hence,
Total volume = 115 x 297 = 31, 155 ml
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draw both enolates formed when the ketone is treated with base. include charges. draw the oxyanion species; do not draw carbanion resonance forms. the starting material is a carbonyl bonded to a methyl and an ethyl group. this forms enolate 1 and enolate 2.
This is an illustration of asymmetric ketone deprotonation. Here, there are two potential outcomes.
What is Thermodynamic Product?
Thermodynamic product is a term used in thermodynamics to refer to the end product of a thermodynamic process. It is the state of the system at the end of the process, which has been changed from its initial state by the application of energy. The thermodynamic product is usually a combination of heat and work, which is released by the system in the form of energy. The thermodynamic product is also known as the final state of the system, which is determined by the total of the energy and mass that enter or leave the system during the process. It is also important to understand that thermodynamic products are not necessarily the desired end result of a process, and that the thermodynamic process can produce a variety of different outcomes depending on the nature of the process.
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Draw a structural formula of an alkene or alkenes (if more than one) that undergo acid-catalyzed hydration and without rearrangement give 1- methylcyclobutanol as the MAJOR product. • You do not have to consider stereochemistry. • You do not have to explicitly draw H atoms. • If more than one structure fits the description, draw them all. • Draw one structure per sketcher. Add additional sketchers using the drop-down menu in the bottom right corner. • Separate structures with + signs from the drop-down menu.
The structure of 1-methyl cyclohexanol is: shown in Fig 1
The reactions for the preparation of 1-methyl cyclohexanol are summarised as: Fig 2
Here In Fig 2, 1-methyl cyclohexene reacts to give 1-methyl cyclohexanol in the presence of water. It proceeds through acid catalysed hydration.
In the Fig 3 reaction, methylene cyclohexane reacts with water to give 1-methyl cyclohexanol. It proceeds through acid catalysed hydration.
Thus, the possible structures of alkene are depicted as: Fig 4
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calculate position of fermi level in n-type silicon with donor concentration of 3x1017 cm-3 at room temperature.
Above 0.115eV from fermi level conduction level is there.
[tex]\begin{aligned}& \eta=3 \times 10^{17} \\& N_c=4.82 \times 10^{15}\left(\frac{m_n}{m}\right)^{3 / 2} T^{3 / 2} \\& N_c=4.82 \times 10^{15} \times(300)^{3 / 2} \quad\left[\because \frac{m n}{m}=1\right] \\& N_c=4.82 \times 10^{15} \times(300)^{3 / n} \quad \\& N_c=250.45 \times 10^{17}\end{aligned}[/tex]
[tex]\begin{aligned}& E_C-E_F=0.026 \ln \left(\frac{250.45}{3}\right) \\& E_C-E_F=0.026 \times 4.42 \\& E_C-E_F=0.115 \mathrm{ev} . \\& E_C=E_F+0.115 \mathrm{VN}\end{aligned}[/tex]
Above 0.115eV from fermi level conduction level is there.
The Fermi Level is the maximum energy level an electron may occupy when it is at absolute zero degrees Fahrenheit. Since the electrons are all in the lowest energy state at absolute zero, the Fermi level is located between the valence band and conduction band.
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consider equimolar samples of different ideal gases at the same volume and temperature. gas a has a higher molar mass than gas b. compare the pressures. a>b a
pressure: A>B, RMS: A<B, kinetic energies: A=B
Does the volume of gases differ?All perfect gases would have the same molarity since they have same number density.It'll be 22.4 L at STP.This is helpful if you really want to visualize the separation of molecules in various samples.
Why are gas volumes the same?According to Avogadro's hypothesis, all gases have an equal number of particles in an equal volume at a given temperature and pressure.The actual particle size themselves is almost negligible because the majority of a gas's volume is made up of the void space between its particles.
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a. how does an enzyme speed up the reaction of a substrate? b. after the products have formed, what happens to the enzyme?
Enzymes speed up the reaction of the substrate by lowering the activation energy.
Substrates are the substances on which an enzyme act. In enzymes, the substrate interacts with the side chain of amino acids which leads to the formation or breaking of bonds. The interaction of a substrate molecule with an enzyme must occur before it is transformed into a product. The place of interaction between an enzyme and a substrate is known as an active site.
After the formation of the product, the enzymes remains intact which means they get back to there original form.
Therefore, enzymes speed up the reaction and remain the same after the formation of product.
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how many liters of a 0.209m ki solution is needed to completly react with 2.43 g of cu(no3)2 according to the balanced chemical reaction
0.124L of 0.209m ki solution is needed to completely react with 2.43 g of cu(no3)2, by Stoichiometric coefficient
Stoichiometric coefficient is the number written in front of atoms, ion and molecules in a chemical reaction to balance the number of each element on both the reactant and product sides of the equation
Consider the following reaction
aA + bB → cC + dD , This reaction says that for a complete reaction a moles of A will react with b moles of B to produce c moles of C and d moles of D
The balanced reaction for the above given case will be
[tex]2Cu(NO_{3})_{2}[/tex] + [tex]4KI[/tex] → [tex]2CuI[/tex] + [tex]I_{2}[/tex] + [tex]4KNO_{3}[/tex]
2.43 g of Cu(NO3)2 = 1.30 × [tex]10^{-2}[/tex] moles.
Number of moles of KI = 2.60 × [tex]10^{-2}[/tex] moles
To calculate the volume of KI needed, we use the formula
M = n OR V = n ⇒ 2.60 × [tex]10^{-2}[/tex]
V M 0.209
V = 0.124L
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predict the bond order for the molecule cs2, which exists in the gas phase at high temperature. would cs2 be paramagnetic or diamagnetic?
The CS₂ molecules has bond order has two and has diamagnetic behaviours.
A volatile liquid with the chemical name carbon disulfide, CS₂ is an organosulfur compound. It is also known as methanedithione, disulfidocarbon, and carbon bisulfide.Sulfur, bromine, lipids, rubber, phosphorus, asphalt, selenium, iodine, and resins can all be dissolved in carbon disulfide. It is frequently employed in the production of flotation agents as well as the purification of single-walled carbon nanotubes. Carbon disulfide is a toxic, combustible, colourless to light yellow, volatile liquid with a pungent odour. It is insoluble in water and has a flash point of -22°F. It sinks because it is denser than water.
Hence, carbon covalently bond with Sulphur to carbon disulphide.
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Mg2+
Draw the Lewis dot structure for Mg2+. Show the charge. To change the symbol of an atom, double-click on the atom and enter the letter of the new atom.
In the two outermost orbitals of magnesium atoms, there are two electrons. In order to become Mg2+, an atom can shed two electrons.
Dots of electrons are represented as Lewis structures, sometimes known as Lewis symbols. In order to create the magnesium ion, or Mg2+, two electrons are supplied by the Mg atom.
As opposed to Mg2+, whose electronic configuration was discovered to be 1s2 2s2 2p6, which has the electron density of Mg as 1s2 2s2 2p6. Magnesium has a 12 atomic number.
Create a Lewis electronic band diagram by picturing the sign for mg inside a box that contains all of the core electrons. The valence electrons are then positioned so that the greatest energy level orbital on each of the box's sides corresponds to their placement.Eight electrons from the Mg2+ ion occupy the empty space in the second orbital.
Here, it should be noted that this ion possesses 8 electrons and a 2 valence shell. As a result, the Lewis structure includes eight points, and because it is a charged molecule, it is also necessary to mention the net charge. Consequently, Mg2Lewis +'s structure.
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The yield of a chemical process is being studied. From previous experience, yield is known to be normally distributed and σ=3 . The past five days of plant operation have resulted in the following percent yields: 91.6, 88.75, 90.8, 89.95, and 91.3.
a. Find a 95% two-sided confidence interval on the true mean yield. b. Find a 95% upper level confidence interval on the true mean yield. c. How many samples of yield is needed to obtain a 95% two-sided confidence interval with width 1? d. If we don't know the value of σ , how would the 95% two-sided confidence interval be?
The two-sided confidence interval is (87.85 ≤ μ ≤ 93.11) , with 87.85 being the lower level and 93.11 being the upper level.
What is a yield in an experiment?The amount of product you actually get after doing an experiment is known as the experimental yield. Calculating the % yield will show you how much of the theoretical yield you actually achieved in a particular experiment. The quantity of pure and dry product produced in a chemical reaction is known as the reaction yield (absolute yield). The relative or percentage yield (%) is typically determined in order to assess the effectiveness of a chemical process in organic synthesis.
How is the yield of a chemical reaction determined?The percent yield can be calculated by applying the following formula:%yield = (actual yield/theoretical yield) x 100.
Brifieng:Step-by-step explanation:
Given the data:
91.6, 88.75, 90.8, 89.95, 91.3
Mean, m = Σx / n
n = sample size = 5
Mean = 452.4 / 5 = 90.48
Standard deviation, σ = 3
Zcritical at 95% = 1.96
Confidence interval :
Mean ± Error margin
Error margin = Zcritical*σ/sqrt
Error margin = 1.96 * 3/sqrt(5)
Error margin = 2.630
Lower boundary : 90.48 - 2.630 = 87.85
Upper boundary : 90.48 + 2.630 = 93.11
(87.85 ; 93.11)
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true or false: if you followed a single carbon atom in a glucose molecule that goes through cellular respiration, you could eventually find that carbon atom in a molecule of carbon dioxide.
True, if you followed a single carbon atom in a glucose molecule that goes through cellular respiration, you could eventually find that carbon atom in a molecule of carbon dioxide.
This is where the citric acid metabolic pathways of cellular respiration occur. After the glycolysis process happens in cell cytoplasm to form pyruvate from glucose molecules, the pyruvate is converted to acetyl-CoA that enters the mitochondria for the TCA cycle. The TCA produces more ATPs from the energy molecule. The carbon atoms will ultimately be expelled from the cell as carbon dioxide.
Reaction involved: (glucose) C₆H₁₂O₆ (s) + 6 O₂ (g) → 6 CO₂ (g) + 6 H₂O (l) + heat energy
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4.0 mol Na2S can form 4.0 mol Na2SO4
and 5.0 mol CuSO4 can form
5.0 mol Na2SO4. How many moles of
Na2SO4 can form?
[?] mol Na₂SO4
Round your answer to the tenths place.
Answer:
9.0 mol Na2SO4
Explanation:
Answer: 4
Explanation: