Intermolecular interaction between being an ion and the terminal of such a polar molecule with the opposite charge known as an ion-dipole force. like sodium chloride(NaCl) in water. 3.
NaCl—is it salt?Most people use the term "salt" to refer to sodium chloride, or table salt. Ionic bonds between sodium ions & chloride ions result in the formation of sodium chloride. The chemical formula for sodium chloride is NaCl because there is 1 sodium cation (Na+) per each chloride anion (Cl-).
NaCl is a sort of salt, right?Sodium(1+) is the counterion in sodium chloride, an inorganic chloride salt.c. It is a salt of inorganic sodium and chloride.
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an element has two naturally occurring isotopes. isotope 1 has a mass of 120.9038 amu and a relative abundance of 57.4 %, and isotope 2 has a mass of 122.9042 amu. part a find the atomic mass of this element. express your answer using four significant figures.
The atomic mass of the element that has two naturally occurring isotopes, isotope 1 has a mass of 120.9038 amu and a relative abundance of 57.4 %, and isotope 2 has a mass of 122.9042 amu = 121.7559
The weighted average of the atomic masses of each isotope is the atomic mass. When calculating a weighted average, each value is multiplied by a number that indicates its relative importance. In this scenario, each isotope's relative importance is indicated by its percent abundance.
The abundance of one isotope is 57.4%, while the abundance of the other is 42.6%.
100% - 57.4 % = 42.6%
Hence,
(120.9038) 0.574) + (122.9042)(0.426)
= 69.3988 + 52.3572
= 121.7559
So, the atomic mass of this element = 121.7559
The element is Sb, antimony with 121.76 atomic mass
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given the titration curve below, what is the equivalence volume (ml) and pka (in that order)? the titration curve has an equivalence point volume of 25.60 and ph of 7.5. the half equivalence point volume is 12.80 with a ph of 1.5. select one: 25.60, 1.5 1.5, 25.60 30, 12.70 12.70, 30
The titration curve has an equivalence point volume of 25.60 and ph of 7.5. The equivalence volume is 25.60 mL and the pKa is 1.5.
The equivalence volume is the volume of titrant added at the equivalence point, which is the point at which all of the analyte has been neutralized by the titrant and the reaction has reached completion. In this case, the equivalence volume is 25.60 mL.
The pKa is the pH at the half-equivalence point, which is the point at which half of the analyte has been neutralized by the titrant. In this case, the half-equivalence point occurs at a volume of 12.80 mL and a pH of 1.5, so the pKa is 1.5.
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compose a list of metallic minerals and a list of non-metallic minerals that are used in and aorund your home, and describe how they are used
Minerals that do not contain metals include bauxite, hematite, iron ore, and others. Non-metallic minerals include diamond, salt, potash, and mica.
What everyday minerals are non-metallic?Some examples include sand, gravel, marble, limestone, clay, and other nonmetallic minerals. Metallic properties like luster, rigidity, good electric and thermal conductivity, and malleability are lacking in these materials; However, they are used by numerous business sectors.
Which metallic minerals are used at our facility?The most frequently used household metals are copper and aluminum. The most common household metal alloys are steel (iron, carbon, and other elements) and brass (copper and zinc).
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1 kg (total mass) of a saturated mixture of liquid water and steam occupies a 10 l rigid, sealed container with a total pressure of 35 bar. what is the total internal energy (u) of the combined mixture inside this container (in kj)? use the steam tables in appendix b of your textbook.
To calculate the total internal energy of the mixture, we need to determine the amount of liquid water and steam in the container, and then calculate the internal energy of each phase using steam tables.
First, we need to find the saturation temperature at 35 bar using steam tables. This temperature is the temperature at which the pressure is 35 bar and the mixture is in a state of equilibrium, with water and steam coexisting in the container.
Next, we can use the steam tables to find the specific enthalpy of vaporization, hfg, for the saturation temperature. The specific enthalpy of vaporization is the amount of heat required to convert 1 kg of liquid water at saturation temperature to steam at saturation temperature.
Once we have hfg, we can calculate the amount of liquid water and steam in the container by using the pressure, volume, and temperature of the mixture. The total internal energy is then the sum of the internal energy of the liquid water and steam.
It's important to note that the calculations are quite involved and require a detailed understanding of thermodynamics, the properties of water and steam, and the use of steam tables. Therefore, this answer provides an overview of the process, but a complete solution would require more extensive calculations and data from steam tables.
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Why do you weigh the solid naoh by difference instead of directly weighing it on a weigh boat?
Since sodium hydroxide is hygroscopic and will collect water from the air, determining its mass is challenging.
In this experiment, why is the mass of the Buret section with water measured twice for each sample?To allow for possible human error, the mass of the burette segment with water should be measured twice. It is less likely that potential errors may affect experimental calculations when there are repeated measurements.
Why is measuring absorbance at its maximum wavelength best?When calculating the concentration of a colored solution, the wavelength of maximum absorbance is utilized since at this wavelength, a small change in concentration can result in a large change in the absorbance of light.
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Given 1 inch equals 2.54 cm how many centimeters are in an average hand that is 9. 50 inches
Answer:
It's not that hard to do figure it out yourself
Explanation:
too simple
an unknown substance enters earth's atmosphere from outer space. the object is measured to have a density of 12.45 g/ml. what is the mass of a cube of this substance that measures 8.0 cm on each side?
The object is to measured to have the density of 12.45 g/ml. The mass of a cube of this substance that measures 8.0 cm on each side is 6374.4 g.
The side of the cube = 8 cm
The volume of the cube is as follows :
Volume of cube = ( side )³
Volume of cube = ( 8 cm³)
Volume of cube = 512 cm³
The density of the cube = 12.45 g/mL = 12.45 g/cm³
The density is expressed as :
The density = mass / volume
Mass = density × volume
Mass = 12.45 g/cm³ × 512 cm³
Mass = 6374.4 g
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Explain how scientists know there are different layers of the earth
Cifras significativas de 63,000
Answer:
Cifras significativas de 63,000
Result 63000
Sig Higos 2 (63000)
Decimales 0
Notación cientifica 6.3 × 104
Notación electrónica 6.3e+4
Palabras sesenta y tres mil
g all of the following are in aqueous solution. which is incorrectly named? question 16 options: 1) h2so4, sulfuric acid 2) h2co3, carbonic acid 3) h3po4, phosphoric acid 4) hcn, cyanic acid 5) hcl, hydrochloric acid
The correct option is D. Hcn, the cyanic acid following is in an aqueous solution.
Solutions wherein water is the solvent are known as aqueous answers. An aqueous solution is water that incorporates one or extra dissolved substances. The dissolved materials in an aqueous answer may be solids, gases, or different liquids. that allows you to be a real answer, an aggregate should be solid.
An aqueous answer is a solution wherein the solvent is water. it is primarily proven in chemical equations by way of appending to the applicable chemical formula. as an example, an answer of table salt, or sodium chloride, in water might be represented as Na⁺ + Cl⁻. An aqueous answer is one in which the solvent is liquid water. this is, solute (dissolved) ions and molecules are surrounded by water molecules and incorporated into the community of bonds inside the water. The dissolved species then unfold for the duration of the water.
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consult the image that depicts bowen's reaction series. what can be said of the temperature at which a granite crystallizes?
Consult the image that depicts Bowen's reaction series. Granite crystallizes at temperatures of about 750° C
According to the geological theory known as Bowen's reaction series, different minerals are created as rocks in the Earth's mantle partially melt. It bears the name Norman L. Bowen in honour of an American geologist.The premise of the series is that minerals crystallise from a magma in a specific order according to their formation temperature. The minerals are divided into felsic and mafic categories according to the Bowen's reaction series. Mafic minerals, like olivine, develop at low temperatures whereas felsic minerals, like quartz, form at the highest temperatures. Plagioclase and amphibole are examples of transitional minerals that exist between these two categories. The minerals crystallise in a predictable order when the magma's temperature drops.
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complete question:
Consult the image that depicts Bowen's reaction series. What can be said of the temperature at which a granite crystallizes?
A) Granite crystallizes at temperatures of about 750° C.
B) Granite crystallizes at temperatures of about 900° C.
C) Granite crystallizes at temperatures of about 1200° C.
D) Nothing can be deduced from this chart about the crystallization temperature of any igneous rock.
sylvanite is a mineral that contains 28.0 % gold by mass. how much sylvanite would you need to dig up to obtain 39.0 g of gold?
The correct answer is
You have to dig 139g of Sylvanite to obtain 39g of Gold.
The most prevalent gold telluride is sylvanite, often known as silver gold telluride, with the chemical formula (Ag,Au)Te2.The ratio of gold to silver can range from 3:1 to 1:1. It is a metallic mineral that is either steely gray or practically white in appearance. It shares a tight relationship with calaverite, a more pure form of gold telluride that contains 3% silver. The monoclinic 2/m system is the way sylvanite crystallizes. Crystals are uncommon; the typical form is bladed or granular. It has a hardness of 1.5 to 2, making it extremely soft. With a relative density of 8.2, it is dense. Because sylvanite is photosensitive, prolonged exposure to intense light can cause it to tarnish darkly.Transylvania is where sylvanite is discovered, and this is where its name is largely from. In the East Kalgoorlie area of Australia, it is also discovered and mined. It may be found in Canada in the Rouyn District, Quebec, and the Kirkland Lake Gold District, Ontario. It may be found in California and Colorado in the US, where it was extracted as a component of the Cripple Creek ore deposit. Native gold, quartz, fluorite, rhodochrosite, pyrite, acanthite, nagyagite, calaverite, krennerite, and other uncommon telluride minerals are associated with sylvanite. The deposits of low temperature hydrothermal veins are where it is most frequently found.
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a helpful rule for converting radians to degrees is
We multiply an angle by 180°/ to translate it from radians to degrees. We multiply an inclination by /180 to change it from degrees to radians.
A radian method is calculated.Radian Formula
Firstly, One degree equals PI/180 radians, and one unit of measure equals 180/PI degrees. Decide how many degrees you want to transform to radians by multiplying the number of degrees by PI/180 (for instance, 90 degrees = 90 x PI/180 radians = PI/2).
Why do radians differ form degrees?By how much we cocked our heads, we may measure angles in degrees. Radians use the distance covered to calculate angles. The angle (s) multiplied by radius yields an angle in trigonometric functions (theta) (r). A circular has 360 degrees, or 2 pi radians, and it takes 2 * pi * r / r to round it entirely.
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The four parts, or blocks, on the periodic table are _____, _____, d, and f.
Responses
A a, ba, b
B s, p
Answer:
B. s, p
Explanation:
The four parts, or blocks, on the periodic table are s, p, d, and f.
Mg + 2HF -> MgF2 + H2
If 72 grams of magnesium is combined with 82 grams of hydrogen fluoride, how many hydrogen molecules will be produced?
If 72 grams of magnesium is combined with 82 grams of hydrogen fluoride, the number of hydrogen molecules that will be produced is: 1.8066 x 10^24 hydrogen molecules.
How to find the number of hydrogen molecules ?First is to determine the number of moles of magnesium and hydrogen fluoride that are present.
Number of moles of magnesium = 72 g / 24 g/mol = 3 moles
Number of moles of hydrogen fluoride = 82 g / 20.01 g/mol = 4.1 moles
Next, we use the balanced chemical equation for the reaction between magnesium and hydrogen fluoride to produce magnesium fluoride and hydrogen gas:
Mg + 2HF → MgF2 + H2
From the equation, we can see that for every 2 moles of magnesium, 2 moles of hydrogen gas are produced. Since we have 3 moles of magnesium, the number of moles of hydrogen produced is:
3 moles Mg * (2 moles H2 / 2 moles Mg) = 3 moles H2
Finally, to find the number of hydrogen molecules, we multiply the number of moles by Avogadro's number:
3 moles H2 * 6.022 x 10^23 molecules/mole = 1.8066 x 10^24 hydrogen molecules
Therefore the number of hydrogen molecules is 1.8066 x 10^24 hydrogen molecules.
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What is the total pressure exerted by a mixture containing two gases if the partialpressure of one gas is 70 torr and the partial pressure of the other gas is 30 torr?a. 100 torrb. 40 torrc. 70 torrd. 30 torr
Answer:
a
Explanation:
Just add the PARTIAL pressures together
to get the TOTAL pressure = 100 torr
a unit cell contains 4 atoms of nickel at a density of 8.90 g/ml. the molar mass of nickel is 58.69 g/mol. calculate the volume of the unit cell in ml.
The volume of the unit cell in ml is 4.4*10^-23 ml.
d = (Z*M)/(V*N)
N = avocadro number
= 6.02*10^23
M = molar mass
V = volume of the unit cell
8.9 = (4*58.69)/(V*6.02*10^23)
8.9 = (3.9*10^-22)/V
V = (3.9*10^-22)/8.9
V = 4.4*10^-23 ml
Molar mass M is the mass of a chemical compound divided by using its quantity-of-substance measured in moles. Its miles are described as MB = m/nB, wherein m is the entire mass of a pattern of pure substance and nB is the amount of substance B given in moles. The definition applies to pure substance.
In chemistry, the molar mass of a chemical compound is defined because of the ratio between the mass and the amount of substance of any sample of said compound. The molar mass is a bulk, now not molecular, property of a substance. The molar mass is the median of many instances of the compound, which often varies in mass due to the presence of isotopes. maximum usually, the molar mass is computed from the standard atomic weights and is as a result a terrestrial common and a function of the relative abundance of the isotopes of the constituent atoms in the world.
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since ammonia and water have arrangement of electron pairs, then the hybridization of the nitrogen and oxygen in both molecules is .
Since ammonia and water have tetrahedral arrangement of electron pairs, then the hybridization of the nitrogen and oxygen in both molecules is sp3
Molecule is the smallest part of a substance that still has the same properties as the substance. If the nature of the arrangement of atoms in a molecule changes, the properties of the molecule will also change. Tetrahedral is a rectangular pyramid shape that has an equilateral triangular face in which there are five atoms of this molecular shape found in ammonia and water.
Hybridization is the process of combining a central atomic orbital with other atomic orbitals to form hybrid orbitals. Such hybrid orbitals can be formed by mixing atomic orbitals that are close in energy in character. In nitrogen covalent bonds are also formed between carbon compounds and other atoms. The sigma bond is formed by overlapping the unpaired sp3 hybrid orbital with the 1s orbital of the hydrogen to give an ammonia molecule and oxygen's six valence electrons. After hybridization, it will have two half-filled sp3 orbitals and will form two bonds reflecting the mixing of the respective atomic orbitals..
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the oxides bao, cao, mgo and sro all produce alkaline solutions when added to water. which oxide produces the saturated solution with the highest ph?
Increasing the quantity of solution is the modification that accelerates the reaction.
What is the reaction's rate?
The rate of the reaction provides information about how quickly the reaction will be completed or the products will develop.
The following chemical reaction:
2H₂O₂ 2H₂O + O₂
MnO₂ serves as a catalyst in the aforementioned chemical process, which speeds up the reaction without actually taking part in it. Therefore, the product's formation is solely dependent on the solution's concentration. Therefore, the rate will grow as the solution amount increases.
Therefore, increasing the solution will result in an increase in rate.
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a certain pipette delivers 5.00 ml 0.05 ml. what is the percent relative uncertainty delivered by the pipette?
Answer:
The absolute error is ± 0.05 grams.The relative error (δ) of your measurement is 0.05 g/1.00 g = 0.05, or 5%.
Explanation:
how many moles of naoh must be added to 1.0 l of 2.0 hc2h3o2 to produce a solution buffered at each ph
The amount of NaOH that must be added is 1.276 moles.
To calculate the pH of a buffer solution, we can use the Henderson-Hasselbalch formula:
pH = pKa + log(A⁻ / HA)
Ka is the acid dissociation constant of a weak acid (HA). The Ka for HC₂H₃O₂ or acetic acid is 1.76 * 10⁻⁵The equation for the reaction between NaOH and HC₂H₃O₂ is as follows:
NaOH (s) + HC₂H₃O₂ (aq) -> Na⁺ (aq) + C₂H₃O₂⁻ (aq) + H₂O (l)
The initial moles of HC₂H₃O₂ is 2.0 M * 1.0 L = 2.0 moles.
Plug the known values into the Henderson-Hasselbalch formula:
5 = -log (1.76 * 10⁻⁵) + log (NaOH moles / 2.0 - NaOH moles)
5 = 4.754 + log (NaOH moles / 2.0 - NaOH moles)
0.246 = log (NaOH moles / 2.0 - NaOH moles)
[tex]10^{0.246}[/tex] = log (NaOH moles / 2.0 - NaOH moles)
1.762 = log (NaOH moles / 2.0 - NaOH moles)
NaOH moles = 1.276.
Your question seems incomplete. The completed version is mostly as follows:
What quantity (moles) of NaOH must be added to 1.0 L of 2.0 M HC2H3O2 to produce a solution buffered at pH = 5?
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if 6.805 grams of material contain 0.096 moles, calculate the molar mass. answer to three significant figures
If 6.805 grams of the material contain 0.096 moles, the molar mass of the material is 70.88 g/mol.
The mass of the material = 6.805 grams
The moles of the material = 0.096 mol
The number of moles is expressed as follows :
The number of moles = mass / molar mass
Where
The number of moles = 0.096 mol
Mass = 6.805 grams
The molar mass is expressed as :
Molar mass = mass / moles
Molar mass = 6.805 g / 0.096 mol
Molar mass = 70.88 g/mol
Thus, the molar mass of the substance is 70.88 with the mass of 6.805 g.
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which of the following samples has the most moles of the compound? group of answer choices 75.0 g of cao 50.0 g of co2 200.0 g of fe2o3 100.0 g of so3 50.0 g of li2o
Li2O's molar mass is determined to be 29.88 g/mol. The following is how the number of moles of Li2O is determined: Li2O has a molecular weight of 1.67 mol, or 50.0 g/(29.88 g/mol).
How can moles be measured in grams?Follow the grams to moles formula to accurately estimate the number of moles, n, of a substance with a particular mass, m (in grams): where n = m/M, where: The material's molar mass is M.
Is 50 moles excessive?Having more than 50 common moles on your body significantly raises your risk of skin cancer, despite the fact that common moles are fairly common and should not always be a cause for concern. You should see a doctor if you have a lot of moles on your body, no matter what kind of moles they are.
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determine the molality of a solution of benzene dissolved in toluene (methylbenzene) for which the mole fraction of benzene is 0.451.
The molality of a solution can be calculated from the mole fraction of the solute, which is the ratio of the number of moles of solute to the total number of moles of solute and solvent.
To determine the molality of a solution of benzene dissolved in toluene, we can first convert the mole fraction to moles of benzene. The number of moles of benzene can be calculated by multiplying the mole fraction by the total number of moles of solute and solvent. Finally, the molality can be calculated by dividing the number of moles of benzene by the mass of toluene in grams. The units of molality are moles per kilogram (mol/kg). In this case, the molality of the solution would be 0.451 x total moles / mass of toluene in grams = molality (mol/kg).
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an unknown compound was determined to be 74.97 carbon. true or false
False. There cannot be 74.97 carbons in an unknown molecule.
What are molecules?A molecule is the smallest unit of a chemical compound and is made up of two or more atoms connected by chemical bonds. It has the chemical properties of the compound. The atoms that make up molecules might be of the same kind, as in the case of molecular oxygen (O2), or they can be of different types, as in the case of water (H2O), which is composed of hydrogen and oxygen atoms.
Chemically speaking, the statement "An unknown molecule was determined to be 74.97 carbon" makes no sense. It is impossible for a compound to consist only of carbon. Chemical analysis can be used to establish the percentage composition of the elements that make up compounds, which are composed of several elements mixed in precise ratios. A molecule might, nevertheless, have 74.97% carbon by weight if it were properly tested.
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What is the frequency of a red light with a wavelength of 650 nm?
[?] x 10[^?] Hz Hine: Watch your units!
c-3.0 x10 m/s
The frequency of a red light with a wavelength of 650 nm is 4.6 × 10¹⁴Hz.
How to calculate frequency?The frequency of a wave (red light) can be calculated by dividing the speed of the wave by the wavelength as follows:
f = v/λ
Wavelength is often designated in physics as λ, and corresponds to the velocity of the wave divided by its frequency.
According to this question, the wavelength of the red light is 650nm i.e. 6.5 × 10-⁷m. The frequency is calculated thus;
f = 3 × 10⁸ ÷ 6.5 × 10-⁷
f = 4.6 × 10¹⁴Hz
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from the following list of elements, select the elements that are likely to form a cation. choose one or more: a. cesium b. barium c. lead d. rubidium e. scandium f. phosphorous g. oxygen h. calcium i. chlorine part 2 (0.5 point)see hint from the following list of elements, select those that will always form ionic compounds in a 1:2 ratio with the halogens. choose one or more: a. oxygen b. lead c. cesium d. scandium e. chlorine f. rubidium g. phosphorous h. calcium i. barium
The elements that are likely to form a cation are :calcium, barium, cesium, rubidium, lead and scandium.
The given elements here are :oxygen, chlorine, calcium, barium, cesium, rubidium, lead, scandium and phosphorous
A cation is defined as an element which has the ability to donate its valence electrons easily and attain electropositive character.
All metal elements has the ability to form cations.
The elements that are likely to form a cation are : calcium, barium, cesium, rubidium, lead and scandium.
The elements that will always form ionic compounds in a 1:2 ratio with the halogens are: lead, barium and calcium.
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Based on the number and polarity of the functional groups in aspirin acetaminophen ibuprofen and caffeine predict which of these four compounds has the highest rf value and which has the lowest
The highest rf value and which has the lowest is ibuprofen>Aspirin>acetaminophen> caffeine
Chromatography uses something known as the Retention Value, or Rf value for short, to make the procedure more scientific than just a visual interpretation. If other experimental parameters are held constant, a specific solvent (or solvent mixture) will move a specific substance the same amount along the stationary phase. To put it another way, each component (dye, pigment, organic material, etc.) has a unique Rf value for each unique solvent and solvent concentration. Because one may compare the Rf values of the unknown sample (or its constituents) with Rf values of recognized substances, Rf values are particularly useful for identification.
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How many molecular orbitals will be generated from the possible linear combinations of two sp2sp2 orbitals?
Through a process known as linear combination, two sp2 hybrid orbitals produce three molecular orbitals.
What is orbital?A mathematical function called an orbital describes where an electron is most likely to be found in an atom. It is described as the area in three dimensions surrounding an atom's nucleus where the electron is most likely to be present. The electron cloud's energy level, angular momentum, and shape are used to describe orbitals.
Through the use of the LCAO method, two sp2 hybrid orbitals can be merged to create three molecular orbitals. Bonding, non-bonding, and antibonding molecular orbitals are these types of molecular orbitals. The shared electrons between the two atoms are held in the bonding molecular orbital, which has a lower energy than the original hybrid orbitals. The antibonding molecular orbital is more energetic and contains the electrons in the bond that weaken the connection, whereas the non-bonding molecular orbital has the same energy as the original hybrid orbitals.
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a buffer is prepared by adding 300.0 ml of 2.0 m naoh to 500.0 ml of 2.0 m ch3cooh. what is the ph of this buffer? [ka(ch3cooh)
The pH of the buffer solution is 4.75. The pH of the buffer can be calculated using the Henderson-Hasselbalch equation. This equation states that the pH of a buffer solution is equal to the pKa of the weak acid plus the logarithm of the ratio of the concentration of the conjugate base to the weak acid. The pH can be calculated as follows:
pH = pKa + log([A-]/[HA])
where [A-] is the concentration of the conjugate base (CH3COO-) and [HA] is the concentration of the weak acid (CH3COOH). The pKa for CH3COOH is 4.75. The initial concentrations of CH3COOH and CH3COO- are equal to 2.0 M, so the pH can be calculated as follows:
pH = 4.75 + log(2.0/2.0)
pH = 4.75
So the pH of the buffer solution is 4.75.
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