Answer: Induced Fit
Explanation: The process wherein the enzymes change their shape is called as induced fit. It is the precision aligning of enzymes essential for catalytic activity which is caused by the binding of the substrate as enzymes possess active sites. Hence, as the substrate approaches the enzymes, the enzyme alters its shape.
65 g of nitric acid are produced in a reaction. 2. 5 g of platinum are added to the reaction vessel at the start of the reaction to act as a catalyst. How much platinum will there be left in the vessel at the end of the reaction?.
2..5 grams of platinum will be there at the end of the reaction, because Platinum is the catalyst here.
Catalyst is a substance that can be added to a chemical reaction to increase the rate of reaction without getting itself consumed in the reaction. It just acts as a driving force for the reaction and it itself does not take part in the chemical reaction.
Catalysts basically speeds up a reaction by reducing the activation energy or also by changing the reaction mechanism. Enzymes are proteins that act as catalysts in the biological systems.
In the above given question if 2.5 grams of platinum is added to the reaction vessel then at the end of the reaction 2.5 grams of platinum itself will be remaining because it acts as a catalyst here.
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how is burning gasoline in an automobile engine part of the carbon cycle?
Burning gasoline in an automobile engine is part of the carbon cycle as the gasoline contains carbon that is released into the atmosphere as carbon dioxide, which is then taken up by plants during photosynthesis.
When gasoline is burned in an automobile engine, the carbon in the gasoline is converted into carbon dioxide gas, which is released into the atmosphere. This carbon dioxide then becomes available to plants during photosynthesis, where it is used to create organic compounds such as sugars and starches. This process is a part of the carbon cycle, which is the natural process by which carbon is cycled through the Earth's atmosphere, oceans, and land. The carbon cycle is essential for life on Earth, as it allows carbon to be used and reused by living organisms in a sustainable way.
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which one of the following substances will give an aqueous solution of ph closest to 7? group of answer choices kno3 nh4i nh3 ch3nh2 co2
Out of the given options, NH3 (ammonia) will give an aqueous solution of pH closest to 7.
This is because ammonia acts as a weak base and forms NH4+ and OH- ions in water, which slightly increase the pH of the solution towards the basic side.
The other options, such as KNO3, NH4I, CH3NH2, and CO2, do not significantly affect the pH of the solution and can either be neutral, acidic or basic depending on their concentration and dissociation in water.
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Gasohol is a mixture of gasoline and ethanol (grain alcohol), C2H5OH. Calculate the maximum work that could be obtained at 25 °C and 1 atm by burning 1. 003 mol of C2H5OH. C2H5OH(1) + 302(g) 2C02(g) + 3H20(g) Maximum work = kJ Use correct number of significant digits;
Gasohol is a blend of gasoline and ethanol. To determine the maximum work that can be obtained by burning 1.003 mol of C2H5OH at 25°C and 1 atm, the Gibbs free energy equation can be utilized. What is Gibbs free energy equation? Gibbs free energy equation is a thermodynamic equation that quantifies the maximum quantity of work that may be obtained during a chemical reaction. T
he equation is as follows: ΔG = ΔH - TΔSThe values of ΔH and ΔS are calculated from thermodynamic tables or by calculating the enthalpy and entropy of the products and reactants, and the temperature, T, is usually specified in Kelvin. The change in Gibbs free energy, ΔG, is the maximum amount of energy that can be obtained from the reaction in the form of useful work if the reaction takes place at constant pressure and temperature. The reaction will proceed spontaneously if ΔG is negative. And if ΔG is positive, the reaction will not take place spontaneously. The solution to this problem is shown below:
First, let's figure out how much heat is produced when one mole of C2H5OH is burnt.ΔHrxn = [2(moles of CO2)(-393.5 kJ/mol) + 3(moles of H2O)(-285.8 kJ/mol)] - [(moles of C2H5OH)(-277.7 kJ/mol)]ΔHrxn = [2(2.006 mol)(-393.5 kJ/mol) + 3(3.009 mol)(-285.8 kJ/mol)] - [1.003 mol(-277.7 kJ/mol)]ΔHrxn = -2043.5 kJ/mol. Now, we'll figure out the entropy change for the reaction.ΔSrxn = [2(moles of CO2)(213.8 J/mol-K) + 3(moles of H2O)(69.9 J/mol-K)] - [(moles of C2H5OH)(160.7 J/mol-K)]ΔSrxn = [2(2.006 mol)(213.8 J/mol-K) + 3(3.009 mol)(69.9 J/mol-K)] - [1.003 mol(160.7 J/mol-K)]ΔSrxn = -104.3 J/mol-KThe temperature in Kelvin is 25°C.273 + 25 = 298 KΔG = ΔH - TΔSΔG = -2043.5 kJ/mol - (298 K)(-104.3 J/mol-K)/1000ΔG = -2032.6 kJ/mol. Therefore, the maximum work that can be obtained by burning 1.003 mol of C2H5OH is 2032.6 kJ/mol, which is the value of ΔG.
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In general, foods high in saturated fatty acids are found in which food groups?
Select one:
a. Fruits and vegetables
b. Milk and meat
c. Vegetable oils
d. Starches and breads
In general, foods high in saturated fatty acids are found in milk and meat food groups (Option B).
What are saturated fats?Saturated fats are those that are solid at room temperature and have no double bonds between their carbon atoms. Saturated fats are commonly found in foods of animal origin, such as fatty beef, pork, and poultry, as well as in butter, cheese, and other dairy products.
Lipids that are solid at ambient temperature are known as saturated fatty acids. They are present in meat and dairy products, including cheese, milk, and butter, as well as some plants, including coconut oil, cocoa butter, and palm oil. Foods high in saturated fats are usually of animal origin and are linked to an increased risk of heart disease.
Thus, the correct option is B.
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What are the 118 elements in the periodic table?
The periodic table is a tabular arrangement of the chemical elements, organized on the basis of their atomic number, electron configurations, and chemical properties. The elements are arranged in rows and columns according to their atomic number, which is the number of protons in the nucleus of an atom of that element. There are currently 118 known elements in the periodic table.
The elements in the periodic table are divided into several groups and periods. The groups, also known as families, are vertical columns on the periodic table and are labeled with numbers from 1 to 18. These groups have similar chemical properties and reactivity. For example, the elements in group 1, the alkali metals, are highly reactive and have a single valence electron. The elements in group 17, the halogens, are also highly reactive and have seven valence electrons.
The periods, or rows, on the periodic table are horizontal and are labeled with numbers from 1 to 7. These periods have elements that have a similar number of electron shells. For example, the first period has only two elements, hydrogen and helium, which have one electron shell. The second period has eight elements, lithium to neon, which have two electron shells.
The first element in the periodic table is hydrogen, which has the atomic number 1. It has only one proton in its nucleus and one electron in its outermost shell. The next element is helium, which has the atomic number 2. It has two protons in its nucleus and two electrons in its outermost shell. The rest of the elements are arranged in the table according to their atomic number, with the lightest elements at the top left of the table and the heaviest elements at the bottom right.
There are several notable elements in the periodic table, such as carbon, which is the basis of all living organisms; oxygen, which is essential for breathing; and iron, which is a crucial component of hemoglobin and is vital for the transport of oxygen in the blood. Other elements like sulfur, phosphorus, and chlorine are also important for life and have a wide range of uses in industry and medicine.
In summary, The periodic table is a useful tool for organizing and understanding the chemical elements, which are arranged in rows and columns according to their atomic number, electron configurations, and chemical properties. There are currently 118 known elements in the periodic table, each with its unique properties and uses.
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How would you explain the path exhaled oxygen-poor and carbon dioxide-rich air takes to leave the body
The path of exhaled oxygen-poor and carbon dioxide-rich air leaving the body begins in the body's cells, where oxygen is used for cellular respiration, and carbon dioxide is produced as a waste product.
When we breathe in, our body takes in oxygen-rich air through the mouth or nose. This air then travels through the trachea, or windpipe, and into the lungs. In the lungs, the oxygen is transferred to the bloodstream while carbon dioxide is released from the blood and into the air sacs of the lungs.
Next, the oxygen-rich blood is pumped by the heart to different parts of the body, where it is used for energy production. As the body uses oxygen, it produces carbon dioxide as a waste product.
This carbon dioxide is carried by the bloodstream back to the lungs, where it is released into the air sacs. Finally, when we exhale, the air travels back up the trachea and out of the mouth or nose, carrying the carbon dioxide-rich and oxygen-poor air out of the body.
This process of inhaling oxygen and exhaling carbon dioxide is known as respiration and is essential for the proper functioning of the body's cells and organs.
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Linda walked the route marked in the diagram from her home at point J to point O.
When Linda reaches point O, what is her new position relative to her home at point J?
Answer:
It 70 meters North
Explanation: You count from where she started.
Two different cars, the Model S and Model T, use different substances in their engines. The image above shows the two substances. At room temperature, both substances are liquids. A car mechanic transferred the same amount of energy out of the two containers, but only one substance changed phase. Which car’s substance changed phase, and how did it change?
Answer:
The Model T’s substance changed phase because the attraction of the molecules was able to overcome their slower movement. Its molecules now move in place.
Determine the partial pressure and number of moles of each gas in a 16.75L vessel at 30 degree C containing a mixture of xenon and neon gases only. The total pressure in the vessel is 7.10 atm, and the mole fraction of xenon is 0.721.
What is the partial pressure of xenon?
What is the partial pressure of neon?
What is the number of moles of xenon?
What is the number of moles of neon?
First, we will calculate the number of moles of mixture of Xenon and Neon gases.Number of moles of mixture of Xenon and Neon gases:
Let x be the mole fraction of Neon.
Therefore, (1 - x) is the mole fraction of Xenon
.Mole fraction of Neon + Mole fraction of Xenon = 1x + (1 - x) = 1x = 1 - (1 -
x = 0 + x
x = 0.279
Mole fraction of Neon = 0.279
Mole fraction of Xenon = 0.721
Number of moles of gas = (Total Pressure * Volume)/(Gas Constant * Temperature)
Number of moles of Xenon = (7.10 atm * 16.75L * 0.721)/(0.08206 * (273 + 30))
Number of moles of Xenon = 8.44 moles
Number of moles of Neon = (7.10 atm * 16.75L * 0.279)/(0.08206 * (273 + 30))
Number of moles of Neon = 3.29 moles
Now, we can calculate the partial pressure of Xenon and Neon.
Partial pressure of Xenon:
Partial Pressure of Xenon = Mole fraction of Xenon * Total Pressure
Partial Pressure of Xenon = 0.721 * 7.10 atm
Partial Pressure of Xenon = 5.12 atm
Partial pressure of Neon
Partial Pressure of Neon = Mole fraction of Neon * Total Pressure
Partial Pressure of Neon = 0.279 * 7.10 atm
Partial Pressure of Neon = 1.98 atm
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To make a 4.50 M solution, how many moles of solute will be needed if 2.0 liters of solution are required
Answer:
4.00 M = moles of solute. 12.0 L.
Explanation:
Calculate the number of moles of gas contained within a bouncy house with a volume of 20.63 cubic meters, a temperature of 300 Kelvin, and a pressure of 101 kPa. (1 cubic meter
The number of moles of gas contained within the bouncy house with a volume of 20.63 cubic meters, a temperature of 300 Kelvin, and a pressure of 101 kPa is 8.72 × 10⁶ mol.
Volume = 20.63 cubic meters
Temperature = 300 K
Pressure = 101 kPa
We can calculate the number of moles of gas contained within a bouncy house using the ideal gas law equation. The ideal gas law equation is given as PV = nRT, where:
P is the pressure of the gas
V is the volume of the gas
n is the number of moles of the gas
R is the universal gas constant
T is the temperature of the gas
R = 8.31 J/Kmol
Substituting the given values in the ideal gas law equation, we get:
101,000 Pa * 20.63 m³ = n * 8.31 J/Kmol * 300 K
Here, we have to convert the volume in cubic meters to cubic centimeters and the pressure in kilopascals to pascals:
1 cubic meter = 10^6 cubic centimeters
1 kPa = 10^3 Pa
On substituting these values, we get:
101,000 * 10^3 Pa * 20.63 * 10^6 cm³ = n * 8.31 J/Kmol * 300 K
Simplifying the equation, we find:
n = (101,000 * 10^3 * 20.63 * 10^6) / (8.31 * 300) = 8.72 * 10^6 mol
Therefore, the number of moles of gas contained within the bouncy house with a volume of 20.63 cubic meters, a temperature of 300 Kelvin, and a pressure of 101 kPa is 8.72 × 10⁶ mol.
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The atmospheric pressure on Stevens pass was measure to be 589mmHg. What is the pressure in atm
Answer:
The pressure is equal to 0.775 atm.
Explanation:
Given that,
The atmospheric pressure on Stevens pass was measure to be 589mmHg.
We need to find the pressure in atm.
We know that,
1 standard atmosphere = 760 mm Hg
1 mm Hg = (1/760) standard atmosphere
589 mm Hg = (1/760)× 589 standard atmosphere
= 0.775 standard atmosphere
Hence, the pressure is equal to 0.775 atm.
how are real gases different from ideal gases? real gases differ from ideal gases because in a real gas, the particles aren’t always moving and .
Real gases differ from ideal gases in several ways. One key difference is that real gases deviate from ideal gas behavior at high pressures and low temperatures.
In an ideal gas, the particles are considered to have zero volume and do not interact with each other.
However, in a real gas, the particles do have a finite volume and do interact with each other through intermolecular forces.
Another difference is that real gases can undergo phase transitions, such as condensation or liquefaction, at temperatures and pressures where ideal gases would not.
Additionally, real gases exhibit non-ideal behavior in terms of compressibility, where the volume occupied by the gas is not solely determined by the pressure applied to it.
Overall, real gases behave differently from ideal gases due to the presence of intermolecular forces and the finite volume of the gas particles. These differences become more pronounced at high pressures and low temperatures.
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identify the various types of solutions. describe the characteristics of each type of solution
There are several types of solutions, including dilute solutions, concentrated solutions, saturated solutions, unsaturated solutions, and supersaturated solutions. Each type of solution has specific characteristics that distinguish them from one another.
Dilute solutions: These solutions have a small amount of solute dissolved in a larger amount of solvent. They have a low concentration of solute particles. Concentrated solutions: Concentrated solutions have a large amount of solute dissolved in a smaller amount of solvent. They have a high concentration of solute particles. Saturated solutions: Saturated solutions contain the maximum amount of solute that can dissolve in a given amount of solvent at a particular temperature. Any additional solute added will not dissolve. Unsaturated solutions: Unsaturated solutions have not reached their maximum solute capacity and can dissolve more solute. Supersaturated solutions: These solutions contain more solute than what is normally possible at a given temperature. They are achieved by dissolving the solute at a higher temperature and then cooling the solution slowly.
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icd 10 code for exploratory laparotomy with small bowel resection
The ICD-10 code for exploratory laparotomy with small bowel resection is K63.1.
The International Classification of Diseases, Tenth Revision (ICD-10), is a standardized coding system used to classify and code diagnoses and procedures in healthcare. For the scenario described, the appropriate ICD-10 code is K63.1. This code specifically represents laparotomy with resection of the small intestine.
Exploratory laparotomy refers to a surgical procedure in which the abdomen is opened to investigate or diagnose a condition. In this case, it is performed in conjunction with small bowel resection, which involves the removal of a portion of the small intestine.
In summary, the ICD-10 code K63.1 is used to classify exploratory laparotomy with small bowel resection. This code serves as a standardized way to document and communicate the specific procedure performed, aiding in medical records, billing, and healthcare data analysis.
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Which of the following statements about Water molecule is TRUE? A) A water molecule has two dipole moments and they cancel each other. B) A water molecule is symmetrical and therefore is nonpolar. C) A water molecule is asymmetric and therefore is polar. D) The electronegative of hydrogen and oxygen are equal and therefore a water molecule is nonpolar. E) none of the above
The correct statement about a water molecule is a water molecule is asymmetric and therefore is polar. Option c is correct.
A water molecule is polar due to its asymmetric molecular structure. The oxygen atom in water is more electronegative than the hydrogen atoms, meaning it attracts the shared electrons more strongly. As a result, the oxygen atom carries a partial negative charge, while the hydrogen atoms carry partial positive charges.
This uneven distribution of charge creates a dipole within the molecule. The dipole moment of one oxygen-hydrogen bond is canceled out by the opposite dipole moment of the other oxygen-hydrogen bond, but the overall molecular geometry and distribution of charges still make the water molecule polar.
This polarity plays a crucial role in various properties and behaviors of water, including its ability to form hydrogen bonds and its high boiling point compared to similar-sized molecules.
Therefore, option c is correct.
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Balance this chemical equation
Ca(OH)2 + HCl ---> CaCl2 + H2O
Answer:
The balance equation of Ca(OH)2 + HCl ---> CaCl2 + H2O
is
Ca(OH)2(s) + 2HCl(aq) ---> CaCl2(aq) +2H2O (l) (balanced equation)
The below table compares the number of electrons in two neutral atoms.
atom:
Ne 10
Na 11
Compare the electron configuration and atomic radius of these two atoms and use that to explain the difference in their reactivity.
Select the correct statements about an aqueous amphoteric salt solution. it?s always basic the pH depends upon the concentration of the salt it?s always acidic it?s always neutral because it is a salt it can be basic or acidic depending upon the pKa values the pH depends only on the salt species not on concentration
The correct statements about an aqueous amphoteric salt solution are 'the pH depends upon the concentration of the salt' and 'it can be basic or acidic depending upon the pKa values'.
An amphoteric salt solution is a unique type of solution because it has the ability to act as either an acid or a base, depending on its surrounding conditions. The behavior of an aqueous amphoteric salt solution is determined by the pKa values of the acidic and basic components, which ultimately define its acidity or basicity.
1. The pH depends upon the concentration of the salt: The concentration of the salt influences the ratio of acidic and basic species in the solution, which in turn affects the pH.
2. It can be basic or acidic depending upon the pKa values: The pKa values of the acidic and basic components in the amphoteric salt determine whether the solution will behave as an acid or a base. If the pKa of the acidic component is lower than that of the basic component, the solution will be acidic.
The incorrect statements about an amphoteric salt solution are: it's always basic, it's always acidic, it's always neutral because it is a salt: While many salts do produce neutral solutions, amphoteric salts can produce solutions that are acidic or basic, depending on the pKa values and concentrations, the pH depends only on the salt species, not on concentration.
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What pressure is exerted by 0.375 mol of hydrogen gas in a 4.33 L container at 55.0C?
Answer:
47
Explanation:
Is the charge of anucleus positive, negative or neutral what about the charge of an atom
Answer:
The nucleus has an overall positive charge as it contains the protons.
Explanation:
Every atom has no overall charge (neutral). This is because they contain equal numbers of positive protons and negative electrons. These opposite charges cancel each other out making the atom neutral.
what happens to the temperature of a material as it undergoes an endothermic phase change? if heat is added, how can the temperature behave in this manner? during an endothermic phase change, such as , energy is by the system. this energy is used to the particles. therefore its temperature . submit answertry another version10 item attempts remaining
In endothermic reactions, greater power is absorbed whilst the bonds within side the reactants are damaged than is launched whilst new bonds are shaped withinside the products. Endothermic reactions are observed through a lower in temperature of the response mixture.
When a material undergoes an endothermic section change, the temperature stays constant. If warmness is added, the temperature behaves on this way due to the fact power is getting used to triumph over intermolecular forces.
Endothermic reactions, greater power is absorbed whilst the bonds within side the reactants are damaged than is launched whilst new bonds are shaped withinside the products. If a chemical response absorbs as a lot power because it releases, it's miles known as isothermic—there may be no power changes.
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Dental implant data: The hardness of metal implant in dental cavities depends on multiplefactors, such as the method of implant, the temperature at which the metal is treated, thealloy used as well as on the dentists who may favour one method above another and maywork better in his/her favourite method. The response is the variable of interest.
The hardness of metal dental implants depends on implant method, treatment temperature, alloy used, and dentist expertise.
The hardness of a metal implant in dental cavities is influenced by various factors. Firstly, the method of implantation plays a crucial role. Different techniques, such as immediate placement or two-stage placement, can affect the final hardness of the implant.
Secondly, the temperature at which the metal is treated during fabrication and processing can impact its hardness. Higher temperatures can lead to improved hardness properties.
Moreover, the choice of alloy used for the implant material is significant. Different alloys, such as titanium or zirconia, possess varying hardness characteristics, affecting the overall hardness of the implant.
Dentists may have their preferences for specific alloys based on their experiences and patient needs.
Lastly, the skill and technique of the dentist performing the implantation procedure can influence the hardness outcome. Dentists who are proficient and experienced in a particular method may achieve better results in terms of hardness.
In summary, the hardness of a metal implant in dental cavities depends on factors like the implantation method, temperature during treatment, choice of alloy, and the expertise of the dentist.
Understanding and optimizing these factors can contribute to achieving desirable hardness properties for dental implants.
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Which electron configuration is correct for a sodium ion?
on the basis of 2n2 rule or subshell?
Do all enzymes have the same shape as their substrates.
All enzymes do not have the same shape as their substrates because the shape of the enzyme's active site allows it to bind only with a specific substrate molecule. Thus, the answer is "No, the do not have the same shape as their substrates."
What is an enzyme?Enzymes are specialized proteins that facilitate biochemical reactions by reducing the activation energy necessary to begin the reaction. Enzymes help to speed up reactions by providing a platform for the reaction to take place while also lowering the activation energy necessary for the reaction to begin.
Therefore, an enzyme with a particular active site can only interact with a specific substrate that fits its shape. This is known as the "lock and key" hypothesis because only a particular key (substrate) will fit perfectly into a specific lock (enzyme). The shape of an enzyme's active site is very specific and allows it to bind only with a specific substrate molecule. As a result, the shape of the enzyme's active site will not be identical to that of its substrate.
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Để trung hoà 50 ml hỗn hợp X gồm HCl và H2SO4 cần dùng 20 ml dung dịch NaOH 0,3M. Cô cạn dung dịch sau khi trung hoà thu được 0,381 gam muối khan. a) Xác định nồng độ mol của các axit trong X. b) Tính pH của dung dịch X.
Answer:
Để trung hoà 50 ml hỗn hợp X gồm HCl và H2SO4 cần dùng 20 ml dung dịch NaOH 0,3M. Cô cạn dung dịch sau khi trung hoà thu được 0,381 gam muối khan. a) Xác định nồng độ mol của các axit trong X. b) Tính pH của dung dịch X.
I need help ASAP!!!! Which of the following is an advantage of using nuclear power plants to
produce electricity?
A) Radioactive waste from nuclear reactors is now being used to power cars,
B) There are no hazardous byproducts from nuclear reactions,
C) Nuclear power does not produce greenhouse gasees
Answer:
The answer is C.
Explanation:
Answer:
C is right i yeah C is right
Given the following equation: CO2 + H2O - H2CO3
How many grams of CO2 are needed to react with 3.6 grams of
H2O?
Answer:
8.8g
Explanation:
They said that was the answer.
What is a possible reason that ecosystem 2 has fewer species than ecosystem 1?
it doesn't repopulate as fast because ecosystem 2 could have more trouble reproducing then ecosystem 1.