In the pair (a) CH3Br or CH3F, the dominant intermolecular forces in CH3Br are dipole-dipole forces, while CH3F has London dispersion forces. Therefore, CH3Br has the higher boiling point [1].
In the pair (b) CH3CH2CH2OH or CH3CH2OCH3, the dominant intermolecular forces in CH3CH2CH2OH are hydrogen bonds, while CH3CH2OCH3 has dipole-dipole forces. Therefore, CH3CH2CH2OH has the higher boiling point.
In the pair (c) C2H6 or C3H8, the dominant intermolecular forces in C2H6 and C3H8 are London dispersion forces. Therefore, C3H8 has the higher boiling point.
In the pair (d) MgCl2 or PCl3, the dominant intermolecular forces in MgCl2 and PCl3 are ionic bonds. Therefore, MgCl2 has the higher boiling point.
In the pair (e) CH3NH2 or CH3F, the dominant intermolecular forces in CH3NH2 are hydrogen bonds, while CH3F has London dispersion forces. Therefore, CH3NH2 has the higher boiling point.
In the pair (f) CH3OH or CH3CH2OH, the dominant intermolecular forces in CH3OH and CH3CH2OH are hydrogen bonds. Therefore, CH3OH has the higher boiling point.
In the pair (g) CH3CH2CH2CH2CH2CH3 or 2,2-dimethylbutane, the dominant intermolecular forces in both molecules are London dispersion forces. Therefore, CH3CH2CH2CH2CH2CH3 has the higher boiling point.
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What is the mole fraction of O₂ in this mixture? 26.1 g of CO2 and 36.6 g of O₂
The mole fraction of a substance in a mixture is the ratio of the number of moles of that substance to the total number of moles of all substances in the mixture.
converting the masses of CO2 and O2 into moles:
CO2: 26.1 g ÷ 44.01 g/mol = 0.59 moles
O2: 36.6 g ÷ 32.00 g/mol = 1.14 moles
adding up the total number of moles:
0.59 moles + 1.14 moles = 1.73 moles
dividing the number of moles of O2 by the total number of moles:
1.14 moles ÷ 1.73 moles = 0.66 or 66%
So the mole fraction of O2 in this mixture is 0.66 or 66%.
What is a mixture?In chemistry, a mixture is a concoction of two or more compounds, each of which maintains its unique chemical identity and properties. Physical separation of the components in a mixture is possible using techniques like distillation, evaporation, or filtering. The qualities of a mixture, as opposed to a chemical compound, rely on the ratios of the constituent parts. Mixtures include things like air, salt water, and gasoline.
A substance made up of two or more separate chemical compounds that are not chemically linked is referred to as a mixture. When two or more substances are physically combined, their identities are maintained, and the mixture takes the shape of solutions, suspensions, or colloids.
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Calculate the area of the surface of a rectangle that measures 14.35mm * 500mm
The area of the surface with sides 500mm and 14.35mm is 7175mm^2
Area of Rectangular surfaceGiven DataLength = 500mmWidth = 14.35mmWe know that the expression for area of flat rectangular surface is given as
Area = Length* Width
Substituting our given data into the expression we have
Area = 500*14.35
Area = 7175mm^2
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How does rate of diffusion relate with molecular
weight of gases?
Answer:
The rate of diffusion of a gas is directly related to the square root of its molecular weight, with lighter gases diffusing faster than heavier gases.
Explanation:
Gases with lower molecular weights diffuse more quickly than gases with higher molecular weights because they have lower mass and therefore require less energy to move.
Use your knowledge of shielding and deshielding effects to match each marked H atom/group of H atoms in the given structure with the expected chemical shift in the 1H NMR spectrum.
A=== 9.2
B======== 2.2
C ======= 3.6
Nuclear magnetic resonance spectroscopy, maximum usually known as NMR spectroscopy or magnetic resonance spectroscopy (MRS), is a spectroscopic approach to examining local magnetic fields around atomic nuclei. The pattern is positioned in a magnetic discipline and the NMR signal is produced through the excitation of the nuclei pattern with radio waves into nuclear magnetic resonance, which is detected with touchy radio receivers.
The intramolecular magnetic subject around an atom in a molecule adjusts the resonance frequency, for that reason giving get right of entry to information on the electronic shape of a molecule and its personal purposeful agencies. as the fields are precise or quite function to individual compounds, in cutting-edge natural chemistry practice, NMR spectroscopy is the definitive technique to perceive monomolecular organic compounds.
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draw the arrow pushing mechanism for the reaction of ethanol and propionic acid. use h+ in place of dowex.
The arrow pushing mechanism for the reaction of ethanol and propionic acid using H+ in place of Dowex is as follows:
The H+ ion acts as a nucleophile and attacks the carbonyl carbon of propionic acid, forming a tetrahedral intermediate. This intermediate then collapses, resulting in the formation of an ethanol molecule and the release of a proton. The proton is then replaced by the H+ ion, resulting in the formation of an ethyl propionate molecule. The overall reaction is represented by the following equation:
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Draw a graph of rate on the y-axis and temperature on the x axis. The graph should Indicate that the reaction rate increases with increase in temperature
The graph of reaction rate on the y-axis and temperature on the x-axis indicates that the reaction rate increases with an increase in temperature.
What is the reaction rate?The rate at which a chemical reaction occurs is known as the reaction rate, which is proportional to both the increase in a product's concentration per unit time and the decrease in a reactant's concentration per unit time. There is a wide range in reaction times.
The reaction rate increases with increase in:
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Initially 100 milligrams of a radioactive substance was present. After 4 hours the mass had decreased by 3%. If the rate of decay is proportional to the amount of the substance present at time t, determine the half-life of the radioactive substance.
The half-life of the radioactive substance is approximately 2.06 hours.
The half-life of a radioactive substance is the amount of time required for half of the initial amount of the substance to decay. If the rate of decay is proportional to the amount of the substance present at time t, the half-life of the substance can be determined as follows:
Let t be the half-life of the substance, then after t hours, the amount of the substance present will be 100 mg × (1/2) = 50 mg.
At time 4 hours, the amount of the substance present is 100 mg × (1 - 3%) = 97 mg.
Since the rate of decay is proportional to the amount of substance present, the half-life can be calculated as follows: t = 4 hours × (50 mg / 97 mg) = 2.06 hours.
Therefore, the half-life of the radioactive substance is approximately 2.06 hours.
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A 155- g sample of steam at 100 ∘C is emitted from a volcano. It condenses, cools, and falls as snow at 0 ∘C . (For water, 80. cal (334 J ) is needed to melt 1 g of ice or must be removed to freeze 1 g of water and 540 cal (2260 J ) is needed to convert 1 g of water to vapor at 100 ∘C .)
Part A
How many kilojoules of heat were released?
Answer:
405.1 kJ
Explanation:
The heat released can be calculated as the sum of the heat needed to freeze the steam to snow (80 cal/g x 155 g = 12400 cal) and the heat needed to convert the water to vapor (540 cal/g x 155 g = 84700 cal).
Converting these values from calories to joules, we have:
12400 cal x (4.184 J/cal) = 51416 J
84700 cal x (4.184 J/cal) = 353688 J
So the total heat released is:
51416 J + 353688 J = 405101 J = 405.1 kJ.
The amount of heat energy released when 155g of steam condenses, cools, and falls as snow is approximately 402.51 kilojoules.
Explanation:The first step to solving this problem is to calculate the amount of heat released when the water vapor of mass 155g condenses into liquid water at 1000C. Using the specific heat of steam, which is 540 cal/g, we multiply this value with the mass to get the heat energy. This yields 83700 cal or 350.58 kilojoules.
The next step is to calculate how much heat is released when the liquid water cools from 1000C to 00C. Using the specific heat of water, which is 1 cal/g/0C, and subtracting the final from the initial temperature yields zero heat energy because the water remains at the same temperature during phase change.
Lastly, we calculate the amount of heat released as the water freezes to become ice at 00C by multiplying the mass of the water by the heat of fusion, which is 80 cal/g. This gives us 12400 cal or 51.93 kilojoules. The total heat energy released is the sum of these three values which is 350.58 kJ + 0 kJ + 51.93 kJ = 402.51 kJ.
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Answer the following for a Bi atom. Include the sign of the charge of the ion even if it is positive and place it in front of the number. For example, enter -3 not 3- or 3. The valence electron configuration is chemPadHelp The number of unpaired electrons is The number of occupied p orbitals in the atom is The charge on its most common ion is
The metal bismuth has a pinkish tint and is white, crystalline, and brittle. The thermal conductivity of bismuth is lower than that of any other metal besides mercury, and it is the most diamagnetic of all metals.
What is Bismuth atoms?The largest Hall effect of any metal and a high electrical resistance are also properties of bismuth (i.e. the greatest increase in electrical resistance when placed in a magnetic field).
Despite dissolving in strong nitric air, bismuth is stable to oxygen and water. When mixed with water, all bismuth salts produce insoluble compounds.
Although not a known carcinogen, bismuth is a recognized hazardous element, although some of its derivatives should be handled carefully due to their corrosiveness (e.g. bismuth chloride).
Therefore, The metal bismuth has a pinkish tint and is white, crystalline, and brittle. The thermal conductivity of bismuth is lower than that of any other metal besides mercury, and it is the most diamagnetic of all metals.
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Determine the number of Al3+ and Cl− ions required to form a neutral ionic compound.
3 chloride ions are required to neutralize the charge of +3 on aluminium ion and the ionic compound formed is AlCl3 .
What is an ionic compound ?Te term ionic compounds is defined as compounds made up of ions that produce charged particles when an atom gains or loses electrons. A cation is an ion charged positively, and an anion is an ion charged negatively.
Al has a charge of +3. Cl has a charge of -1. Therefore,3 chloride ions are required to neutralize the charge of +3 on aluminium and the neutral ionic compound AlCl3 is formed.
Thus, 3 Al3+ and 1 Cl− ions required to form a neutral ionic compound AlCl3.
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The threshold frequency 0 describes the smallest light frequency capable of ejecting electrons from a metal.
Determine the minimum energy 0 of a photon capable of ejecting electrons from a metal with 0=5.43×1014 s−1.
What is the maximum kinetic energy electron of electrons ejected from this metal by light with a wavelength of 245 nm?
The minimum energy of the photon is 3.60 * 10⁻¹⁹
The maximum kinetic energy electron ejected is 4.52 * 10⁻¹⁹ J
What is the minimum energy of the photon?The minimum energy of the photon is calculated as follows:
E = hν
where:
h is the Planck's constant = 6.626x10-34 Js
ν is the frequency = 5.43 * 10¹⁴ s⁻¹
E = 6.63 * 10⁻³⁴ Js * 5.43 * 10¹⁴ s⁻¹
E = 3.60 * 10⁻¹⁹
The maximum energy is calculated as follows:
E = hc / λ
where
c is the speed of light = 3 * 10⁸ m/s
λ is the wavelength in m = 2.45 * 10⁻⁷m
E = 6.63 * 10⁻³⁴ * 3 * 10⁸ / 2.45 * 10⁻⁷
E = 8.12 * 10⁻¹⁹ J
The maximum kinetic energy electron ejected = 8.12 * 10⁻¹⁹ J - 3.60 * 10⁻¹⁹J
The maximum kinetic energy electron ejected = 4.52 * 10⁻¹⁹ J
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When determining the density of the ethanol solution in part B, what volume of the solution should be run into the flask from the burette in each trial?
A .20 to 25 ml
B. 25 to 30 ml
When measuring the density of the ethanol 25 to 30 ml should be run in.
What is the density?Density is the measure of mass per unit volume of a substance or object. It is defined as the ratio of the mass of an object to its volume and is usually expressed in kilograms per cubic meter (kg/m^3) or grams per cubic centimeter (g/cm^3).
The density of a substance determines its behavior and how it will interact with other substances in the environment. We know that the density of the ethanol can be measured when we obtain the volume and the mass of the solution.
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Mark all of the levels of structure you would expect to find in a protein that functions as a complex with multiple polypeptide subunits. Group of answer choices
a. Quaternary structure
b. Secondary structure
c. Primary structure (sequence)
d. Tertiary structure
The level of structure that one would expect to be found in a protein that functions as a complex with multiple polypeptide subunits is quaternary structure. the correct answer is A.
Quaternary structure is the level of structure that one would anticipate to see in a protein that performs as a complex with many polypeptide subunits.
Many proteins consist of just one polypeptide chain and only have the three levels of structure we just covered. Nevertheless, some proteins are composed of several polypeptide chains, also referred to as subunits. These component parts combine to form the protein's quaternary structure.
Hemoglobin is one instance of a protein having quaternary structure that we've already come across.
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how many moles are present in 2.50 x 10^23 molecules of C4H6? show work
2.50 x 10^23 molecules of C4H6 contains 1.25 x 10^23 moles of C4H6.
What do you mean by moles?
Moles are a unit of measurement used to quantify the amount of a substance. They represent the amount of a substance, measured in terms of the number of atoms, molecules, ions, or other particles present in a given sample. For example, one mole of carbon atoms equals 12 grams of carbon.
To calculate this, we use the equation:
Moles = (Number of molecules) / (Avogadro's number)
Moles = (2.50 x 10^23 molecules) / (6.02 x 10^23 molecules/mole)
Moles = 1.25 x 10^23 moles.
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In most living species, which monosaccharide is the most important source of energy?
In most living species, glucose is the monosaccharide which is the most important source of energy.
What is monosaccharide?A simple sugar or monosaccharide is a carbohydrate which can be digested into smaller carbs. A monosaccharide, like other carbohydrates, is composed of three chemical components: carbon, hydrogen, as well as oxygen.
It is the most basic kind of molecule of glucose and therefore is frequently used to build more complicated compounds. Aldoses, ketoses, as well as their derivatives are examples of monosaccharides. A monosaccharide has the typical chemical formula CnH2nOn or (CH2O)n. In most living species, glucose is the monosaccharide which is the most important source of energy.
Therefore, in most living species, glucose is the monosaccharide which is the most important source of energy.
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Which of the following substances exhibits H bonding? For those that do, draw two molecules of the substance with the H bonds between them. (a) C2H6 (b) CH3OH (c) CH3CONH2 (d)CH3COOH (e)CH3CH2OH (f) CH3COCH3
(b) CH3OH For those that do, draw two molecules of the substance with the H bonds between them.
What is molecules ?Molecules are the smallest particles of any given substance that are made up of two or more atoms chemically bonded together. Molecules can contain different types of atoms, such as hydrogen, oxygen, nitrogen and carbon. Molecules can be single atoms such as oxygen or they can be large and complex such as proteins and DNA. Molecules are the building blocks of matter and are essential for the formation of all physical objects. Molecules can be found in both organic and inorganic materials, and they play a vital role in all of the chemical processes that occur in nature. Molecules are essential for life, as they are responsible for the formation of proteins and other molecules that form the structures and functions of cells, tissues, and organs.
H-C-O-H
H | H
|
H-C-O-H
H | H
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How many bonds and lone pairs surrounding the central atom of OF2
Two electron bond pairs combine to generate two O–F bond pairs. Two single electron pairs make up the O-atom. There are three lone electron pairs in each F atom. There are thus eight lone electron pair overall.
What are three electron-related facts?The negatively charged particles known as electrons revolve about the outside of the nucleus. For scientists, it can be challenging to monitor them because of how quickly they spin. The tiniest particles in an atom, you can put 2000 of them out of a proton, they are drawn to the positive ions of the protons.
What is an electron example?The smallest elemental component of an atom, the electron has a negative charge. Quantity of protons.
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Suppose that you have a 1:1 mixture of compounds that is comprised of compound X and compound Y. You desire pure compound X and are planning a recrystallization to enhance the purity. Which solvent below is optimal for your recrystallization? Ethanol (boiling point = 78 °C)
Solubility At
0 °C 100 °C
Compound X 0.05 g/mL 0.20 g/mL
Compound Y 0.02 g/mL 0.40 g/mL Water (boiling point = 100 °C)
Solubility At
0 °C 100 °C
Compound X 0.02 g/mL 0.05 g/mL
Compound Y 0.01 g/mL 0.10 g/mL
Methanol (boiling point = 65 °C)
Solubility At
0 °C 65 °C
Compound X 0.04 g/mL 0.10 g/mL
Compound Y 0.02 g/mL 0.30 g/mL
Acetone (boiling point = 56 °C)
Solubility At
0 °C 56 °C
Compound X 0.10 g/mL 0.50 g/mL
Compound Y 0.20 g/mL 0.50 g/mL
Ethyl Acetate (boiling point = 77 °C)
Solubility At
0 °C 77 °C
Compound X 0.10 g/mL 0.60 g/mL
Compound Y 0.30 g/mL 0.60 g/mL
The optimal recrystallizing agent for compound x should have a melting point of 1 or 5 degrees Celsius.
In chemistry, recrystallization is a technique for purifying chemicals. When a mixture of compound and impurity is dissolved in a suitable solvent, either the compound of interest or the impurity is removed from the solution while the other remains. Recrystallization, also called fractional crystallization, is the process of purifying impure compounds in a solvent. The purification process is based on the principle that the solubility of most solids increases with increasing temperature. The optimal recrystallizing agent for compound x should have a melting point of 1 or 5 degrees Celsius.
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according to the bohr effect, as the concentration of co2 increases, the concentration of h question blank 1 of 1
When the concentration of CO2 increases, the concentration of H+ ion increases. This is according to the Bohr's effect.
Bohr's effect can be explained as the observation that increases in the carbon dioxide partial pressure of blood or decreases in blood pH result in a lower affinity of hemoglobin for oxygen. This shifts right ward shift in the Oxygen Hemoglobin Dissociation Curve. The Bohr Effect allows for enhanced unloading of oxygen in metabolically active peripheral tissues. It causes the muscles and tissues to release more oxygen when CO2 levels rise. It helps in deliver oxygen to metabolizing tissue such as skeletal muscle where it is needed most. The decrease in carbon dioxide will increase hemoglobin's affinity for oxygen. It means hemoglobin is less likely to release oxygen.
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The complete question is,
According to the Bohr's effect, as the concentration of co2 increases, the concentration of [tex]H^{+}[/tex] ion increases or decreases?
1) A 3.05 g sample of an unknown gas at 25 ∘C and 1.10 atm is stored in a 1.45 L flask.
What is the density of the gas?
What is the molar mass of the gas?
2) A 298.5 mL sample of carbon dioxide was heated to 385 K. If the volume of the carbon dioxide sample at 385 K is 547.8 mL, what was its temperature at 298.5 mL?
1a. The density of the gas, given that 3.05 g of it is stored in the flask is 2.10 g/L
1b. The molar mass of the gas is 46.7 g/mol
2. The temperature at 298.5 mL is 210 K
1a. How do I determine the density of the gas?The density of the gas can be obtained as follow:
Mass of gas = 3.05 gVolume of gas in flask = 1.45 LDensity of gas =?Density = mass / volume
Density of gas = 3.05 / 1.45
Density of gas = 2.10 g/L
Thus, the density is 2.10 g/L
1b. How do I determine the molar mass?The molar mass of the gas can be obtained as illustrated below:
Temperature (T) = 25 °C = 25 + 273 = 298 KPressure (P) = 1.10 atmGas constant (R) = 0.0821 atm.L/Kmol Density (D) = 2.10 g/LMolar mass of gas (M) =?M = DRT / P
M = (2.10 × 0.0821 × 298) / 1.10
M = 46.7 g/mol
Thus, the molar mas is 46.7 g/mol
2. How do I determine the temperature?The temperature of the gas at 298.5 mL can be obtained as follow:
Initial volume (V₁) = 298.5 mL New volume (V₂) = 547.8 mLNew temperature (T₂) = 385 K Initial temperature (T₁) = ?V₁ / T₁ = V₂ / T₂
298.5 / T₁ = 547.8 / 385
Cross multiply
T₁ × 547.8 = 298.5 × 385
Divide both side by 547.8
T₁ = (298. × 385) / 547.8
T₁ = 210 K
Thus, the temperature is 210 K
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assume a certain element has a density of 10.5 g/ml. you have a bag containing 81.50 g of pellets of this element. what is the volume in ml of the pellets in your bag? use density as a conversion factor to solve this problem.
The volume in mL of the pellets in your bag is 7.76mL.
How to calculate volume?Density is the measure of the mass of matter contained by a unit volume.
The density of a substance can be calculated using the following formula:
Density = mass ÷ volume
According to this question, a certain element has a density of 10.5 g/ml. one has a bag containing 81.50 g of pellets of this element. The density of the element is as follows:
10.5g/mL = 81.50g ÷ volume
volume = 81.50g ÷ 10.5g/mL
Volume = 7.76mL
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Suppose that when you plot the masses of several samples of an unknown substance against the corresponding volumes of water displaced by the samples, the slope of the resulting straight line is 2.7 g/mL. What is the substance's density and probable identity?
The density of the object is 2.7 g/mL and it is aluminum.
What is density?We have to note that the density of the material is the ratio of the mass to the volume of the object. In the case the density was determined experimentally by plotting the masses of several samples of an unknown substance against the corresponding volumes of water displaced by the samples.
We know that the density is the slope of the graph and the density of the object based on the statement in the question is 2.7 g/mL.
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Please help me answer this question
The enthalpy change (∆H) from the formation of 2H --> H₂ is: A. -432 kJ/mol.
How to calculate the enthalpy change using the bond energies?Bond energy is the average energy needed to break the bond in a molecule within a reaction. We can use the bond energy to calculate the ∆H of the reaction as follows:
∆H = (∑ bond energies of the reactants) – (∑ bond energies of the products)
∆H = (2 x H) – (1 x H-H)
∆H = (2 x 0) – (432) kJ/mol
∆H = -432 kJ/mol
Hence, the enthalpy change from the formation of H₂ is: -432 kJ/mol.
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What is the atomic mass of neon in gram per mole?
Answer:
The atomic mass of Neon atoms is 20 g/mol (Rounded off).
suppose the price elasticity of demand for heating oil is 0.2 in the short run and 0.7 in the long run.
Short run heating oil consumption will decrease by 4%, and long-term demand will decrease by 14%. Because people can react to changes in the price of heating oil more readily, the change is greater over time.
How elastic is the price both now and in the future?The demand elasticity for heating oil at the going rate = 0.2 in the foreseeable future
Price change over the long term is 0.7%; price change over the short term is 2.20 - 1.80 / 2 x 100 = 20%.
Both the short-term and long run demand for heating oil will decline by 4% each.
The shift in the price of heating oil is bigger over time because customers can respond to changes more quickly. The ratio of variations in quantity demanded and price over the short term is known as price elasticity of demand.
To get the percentage change in quantity required, divide 20 by 0.2; the result is 4%.
The ratio of long-term variations in quantity required and price is known as price elasticity of demand.
Change in demand as a percentage: 20 * 0.7 = 14% Change in demand as a percentage: 0.7 Demand change as a percentage: 20
Your question is incomplete but most probably your full question was
Suppose the price elasticity of demand for heating oil is 0.2 in the short run and 0.7 in the long run. if the price of heating oil rises from $1.80 to $2.20 per gallon, what happens to the quantity of heating oil demanded in the short run? in the long run? (use the mid point method in your calculations.)
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In the Bohr model of the hydrogen atom, the electron circles the proton at a distance of 0.529×10−10 m. Find the electric potential at the position of the electron.
The electric potential at the position of the electron is -8.23 10⁻¹⁷ N / C.
The amount of labor required to convey a unit of electric charge from a reference point to a given place in an electric field is known as the electric potential (also known as the electric field potential, potential drop, or the electrostatic potential).
The energy gained by an object when it is moved against an electric field is known as the electric potential energy. Divide the potential energy by the amount of charge to get the charge's electric potential.
The electric potential for the ground state corresponding to the Bohr orbit in the Bohr model is
E = k q₁ q₂ / r²
where,
q₁ is the charge of the proton and q₂ the charge of the electron
E = - k e² / a₀²
E = - 9 10⁹ (1.6 10⁻¹⁹)² / (0.529 10⁻¹⁰)²
E = -8.23 10⁻¹⁷ N / C
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Which of the following statements about lactic acid fermentation is not correct?(a) It produces two ATP molecules for every glucose molecule.(b) It is inefficient compared to aerobic respiration.(c) Oxygen is the final electron acceptor of this pathway.(d) It uses glucose as a substrate.(e) Glycolysis is the only energy-yielding step of this pathway.
Among the following statements about lactic acid fermentation, "Oxygen is the final electron acceptor of this pathway" is not correct. The correct answer is C.
Lactic acid fermentation is an anaerobic process, meaning that it occurs in the absence of oxygen. Instead of oxygen being the final electron acceptor, the electrons are passed to NAD+, which reduces it to NADH. This reduction of NAD+ is an important energy-yielding step of the lactic acid fermentation pathway.
The other statements are correct:
A) It produces two ATP molecules for every glucose molecule.
B) It is inefficient compared to aerobic respiration, which can produce up to 38 ATP molecules from a single glucose molecule.
D) It uses glucose as a substrate.
E) Glycolysis is the only energy-yielding step of this pathway.
Overall, lactic acid fermentation is a less efficient energy-yielding process compared to aerobic respiration, but it can still produce some energy for cells that are in low-oxygen environments.
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Write a general equation for the reaction of a halogen with a metal. (Assume the charge of the metal in ionic compounds is 2+) Express your answer as a chemical equation. Do not identify the phases in your answer. Denote the metal as MM and the halogen as XX.
The general chemical equation for the reaction of a halogen with a metal is M+ X[tex]\rightarrow[/tex] MX₂.
What is chemical equation?Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.
A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .
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When an NMR active nucleus is placed in a magnetic field, this external field induces a small local field in the electrons surrounding that nucleus. This local field is in the ______ direction as/to the external field, causing the nucleus to experience a ______ external field. The electrons are said to ______ the nucleus from the external field.
The local field is in the opposite direction to the external field, causing the nucleus to experience a reduced external field. The electrons are said to shield the nucleus from the external field.
This polarization causes the nucleus to experience a reduced magnetic field, which is referred to as the shielding effect. The electrons absorb the energy from the external field, thus shielding the nucleus from it. This shielding effect is represented by the shielding parameter, which is the ratio of the external field to the local field experienced by the nucleus.
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1) If an ideal gas has a pressure of 3.93 atm, a temperature of 23.45 ∘C, and a volume of 33.57 L, how many moles of gas are in the sample?
2) The combustion of octane, C8H18, proceeds according to the reaction shown.
2C8H18(l)+25O2(g)⟶16CO2(g)+18H2O(l)
If 546 mol of octane combusts, what volume of carbon dioxide is produced at 12.0 ∘C and 0.995 atm?
5.4 mole of gas are in the sample. 57472.01 L volume of carbon dioxide is produced at 12.0 ∘C and 0.995 atm.
What is an ideal gas equation ?The ideal gas equation is represented as: PV = nRT. In this equation, P refers to the pressure of the ideal gas, V is the volume of the ideal gas, n is the total amount of ideal gas that is measured in terms of moles, R is the universal gas constant, and T is the temperature.
1. According to the ideal gas laws, we know,
PV = nRT,
where, P = Pressure, V= Volume, T= Temperature in K, R = universal gas constant = 0.082 lit-atm/K/mol
Now,
T= 23.45°C = (273+23.45) K = 296.45 K
P = 3.93 atm and V = 33.57 L
By substituting these values, we get,
n = 3.93 × 33.57 / 0.082 × 296.45
= 131.93 / 24.3
= 5.4 mole
2. Given:
Moles of octane = 297 moles
According to the given reaction:-
2 moles of octane on reaction produces 16 moles of carbon dioxide
1 mole of octane on reaction produces 16/2 moles of carbon dioxide
297 moles of octane on reaction produces 8*297 moles of carbon dioxide
Moles of carbon dioxide = 2376 moles
Pressure = 0.995 atm
Temperature = 20.0 °C
The conversion of T( °C) to T(K) is shown below:
T(K) = T( °C) + 273.15
T₁ = (20.0 + 273.15) K
= 293.15 K
By ideal gas equation as:
PV=nRT
0.995 atm × V = 2376 mol × 0.0821 L.atm/K.mol × 293.15 K
V = 57472.01 L
Thus, 5.4 mole of gas are in the sample. 57472.01 L volume of carbon dioxide is produced at 12.0 ∘C and 0.995 atm.
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