Consider the decomposition of ammonium chloride at a certain temperature NH4Cl (s) <=> NH3 (g) + HCl (g). The equilibrium constant Kp is 4.4, if the total pressure is 2.2 atm at that temperature.
When a chemical process reaches equilibrium, the equilibrium constant (often represented by the letter K) sheds light on the interaction between the reactants and products. For instance, the ratio of the concentration of the products to the concentration of the reactants, each raised to their respective stoichiometric coefficients, can be used to establish the equilibrium constant of concentration (denoted by Kc) of a chemical reaction at equilibrium. It is significant to remember that there are several kinds of equilibrium constants that establish relationships between the reactants and products of equilibrium reactions in terms of various units. The ratio of reactant to product amounts that is used to predict chemical behavior is the definition of the equilibrium constant for a chemical process. In a state of equilibrium, the forward reaction rate equals the backward reaction rate. The rate constants are constant at a certain temperature. An equilibrium constant is the ratio of the forward reaction rate constant to the backward reaction rate constant, which must be a constant (Kequ).
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31. Applying Concepts Element Q forms
compounds with element X and with element Z.
Write the formulas for these two compounds.
formula be for these two compounds
—HELP!!! ASAP
What was the concentration of co2 in the atmosphere when the measurements at mauna loa began?
Answer: 315 ppm
Explanation:
What intermolecular forces are found in carbon disulfide, CS2? O Dipole-dipole forces O Dispersion forces O lon-dipole bondingO Hydrogen bonding
The intermolecular forces that are found in carbon disulfide CS2 is two bond diploes.
What is intermolecular forces?Intermolecular forces are the forces that are between to of molecules. And so that's different from an to the relative intramolecular force, whichever is the force within a molecule.
London dispersion forces supposedly have the least by its strength out of all the intermolecular forces. But of CS2, which has only the dispersion forces, has a higher boiling point (and thus stronger and the intermolecular forces) than COS, which has dipole-dipole attraction in to the addition to dispersion forces.
I suppose that it had something to do with CS2 having a thicker/more than inducible electron shell, but it is then a new question arises: how would you know if the dispersion forces in one molecule are stronger of that the dipole-dipole forces in another.
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if a given reaction has got a rate constant value of 5.2 x 10^-3 what would be the order of that reaction
If a given reaction has got a rate constant value of 5.2 x 10^-3. The order reaction that reaction is 2nd order.
The order reaction is the relationship between the rate of a chemical reaction and the quantity of the species involved. To discover the reaction order, one must first ascertain the rate expression (or rate equation) of the pertinent process. The entire species mixture involved in the reaction may be understood once the rate equation has been established. The order of the reaction can be determined using the rate's dependency on the concentration of each component. For instance, the rate of a first-order reaction is solely dependent on the concentration of one species. The reaction order of a chemical reaction's various features are listed below. The order of reactions is a representation of the number of species whose concentration directly affects the rate of reaction. It can be calculated by adding up all of the exponents for the concentration terms in the rate statement. The order of the balanced reaction is unaffected by the stoichiometric coefficients for any species present.
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Which one of the following will exhibit the highest osmotic pressure at 25°C?
a) KCl.
b) Glucose.
c) Urea.
d) Calcium chloride.
Highest osmotic pressure is given by solution which produce maximum number of ions i.e. CaCl2 (Calcium chloride).
What is Osmotic pressure ?The osmotic pressure is the least amount of pressure that must be applied to a solution in order to stop a semipermeable barrier from allowing a solution's pure solvent to pass through. Additionally, it is described as a measurement of a solution's propensity to absorb its pure solvent through osmosis.
Water cannot pass through a semipermeable membrane due to osmotic pressure. Utilizing the osmotic pressure formula, one may determine the pressure that prohibits osmosis from taking place. Assume that you are preparing a saltwater solution. The mixture of water and salt (solute) will make up the solution (solvent).
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a 1.513 g sample of khp (c8h5o4k) is dissolved in 50.0 ml of di water. when the khp solution was titrated with naoh, 14.8 ml was required to reach the phenolphthalien end point. calculate the molarity of the naoh solution? khp is a monoprotic acid.
molar mass of KHP ( C8H5O4K)= 8*12+5+4*16+39=204
( atomic weights : C=12, H=1, K=39 and O= 16)
moles of KHP= mass/molar mass = 1.513/204 =0.0074
The reaction between KHP and NaOH is
KHC8H4O4(aq) + NaOH(aq) => KNaC8H4O4(aq) + H2O(l)
1 mole of KHP requires 1 mole of NaOH;
moles of KHP=0.0074
moles of NaOH= 0.0074
concentration of NaOH= moles/ Volume in L, 1000ml= 1L, 14.8ml= 14.8/1000L=0.0148L
concentration of NaOH=0.0074/0.0148=0.5M
The molarity of NaOH is 0.5M
Molar Mass:
In chemistry, the molar mass of a compound is defined as the mass of a sample of that compound divided by the amount of substance. This is the number of moles of that sample measured in moles.
Molarity:
Molarity is used to describe the concentration of a solution. Molarity, also called molarity, is the number of moles of solute (dissolved substance) per liter of solution.
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What is the formula for copper (II) nitrite?
a. Cu3N2
b. Cu(NO2)2
c. Cu3(NO3)2
d. Cu3(NO2)2
The formula for copper (II) nitrite is B: 'Cu(NO3)2'.
Copper (II) nitrate is a chemical compound with the formula 'Cu(NO3)2'. Generally referred to as simply copper nitrate, the anhydrous state is a blue, crystalline solid. The hydrated state of copper (II) nitrate, is also blue, which is commonly used in school and college laboratories to demonstrate chemical voltaic cell reactions. The hydrated and anhydrous forms have remarkably different characteristics, illustrating the effect of water on crystallization.
"
Note: The question with correct options are:
What is the formula for copper (II) nitrite?
a. Cu3N2
b. Cu(NO3)2
c. Cu3(NO3)2
d. Cu3(NO2)2
"
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why does i2 have a higher boiling point than f2
Iodine molecules will be forced to cling together by this force since it is so powerful. The iodine molecule is therefore extremely tough to break. Iodine has a higher boiling point as fluorine as a result.
What exactly is boiling point?
The temperature when a liquid's vapor pressure equals that tension of the gas below it is known as the boils point of the liquid. The degree at which a liquid's vapor pressure equals one atmosphere is called the liquid's typical boiling point (760 torr). The view from a distance. view from a distance of a bubbles in boiling water.
High boiling point: What does that mean?
It measures the point where a chemical boils, to put it simply. A higher the boiling point denotes stronger intermolecular forces, similar to the melting point.
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Balance this reaction.
CH₂OH +
O₂ →
CO2 +
V H2O
Answer:
4CH₂OH + 5O₂ → 4CO₂ + 6H₂O
Explanation:
4CH₂OH + 5O₂ → 4CO₂ + 6H₂O
C = 4
H = 12
O = 14
would acids still be possible if electrons were in the nucleus and the protons were in/on/moving around (i dont knowwww) the orbitals?
Answer:
moving around
Explanation:
The answer is essentially:
No. Life would be no different if electrons were positively charged and protons were negatively charged. Opposite charges would still attract, and like charges would still repel.
On a camping trip, Susan decides to cook smores with her family. Describe all possible forms of heat transfer that Susan may come into contact with.
The ways that Susan may come into contact with heat transfer is by;
ConductionConvectionRadiationWhat is heat transfer?When we are talking about heat transfer, what we are looking at is the transfer of heat from one point to the other. We know that the transfer of heat would have to do with the temperature difference between the materials that are involved. This is because, heat is defined as the form of energy that does exist any time that we have a temperature difference two bodies.
When you are cooking, the three types of heat transfer would come into play and these are conduction, convection and radiation. When the pot is put on fire, we would notice that the pot would heat up after some time and this is due to conduction.
After it has heat up, the water that is at the lower layer would rise up and replace the water that is at the lower layer of the pot. This is heat transfer by convection.
Some one that stands some distance from the fire place would soon begin to feel heat and this would occur by radiation.
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when 0.485 g of compound x is burned completely in a bomb calorimeter containing 3000 g of water, a temperature rise of 0.285°c is observed. what is δu of the reaction for the combustion of compound x? the hardware component of the calorimeter has a heat capacity of 3.81 kj/°c. the specific heat of water is 4.184 j/g·°c. the molar mass of compound x is 56.0 g/mol.
The change in internal energy for 56 g/mol of the molecule is discovered to be e -539 kJ/mol.
A reaction's internal energy change is represented by the symbol U. U = calorimeter heat plus solution heat for a reaction in the bomb calorimeter.
Heat capacity equals heat Temperature
Regarding, 0.485 g compound
For the 56 g/mol compound, U = 3.81 0.285 + 4.184 3000 0.285 U = 4.67 kJ
U = moles of energy/mass
56 U equals 539 kJ/mol at U = 4.67/0.485.
The whole amount of energy that a thermodynamic system has inside of it is known as internal energy. It is the energy required to develop or prepare the system in its current internal condition, and it comprises both internal kinetic energy and potential energy contributions. It keeps track of the system's energy gains and losses brought on by modifications in its internal state. [1][2] It excludes any external energies from the surrounding force fields as well as the kinetic energy of motion of the entire system. The first law of thermodynamics, which is based on the fact that an isolated system's internal energy is constant, is stated as the law of conservation of energy. The interior energy is a vast quality.
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the inventory of phonemes used in spanish is nearly identical to that used in english. t or f
The given statement, "The inventory of phonemes used in Spanish is nearly identical to that used in English" is true.
The number of phonemes and letters that is used to represent them can vary between languages and dialects, therefore these numbers are not fixed numbers. A phoneme is defined as the smallest unit of speech in linguistics that distinguishes one word (or word element) from another.
For example, the letter p is used to distinguish the word "tap" from terms like "tab," "tag," and "tan." Based on the spoken language, the symbols of the International Phonetic Alphabet are used to represent phonemes. While some linguists are used to extend the definition of "phoneme" beyond vowels and consonants to include phonologically significant variations in pitch, stress, and rhythm, most linguists stick to this restriction.
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Ethane has the formula CH3CH3. What is the predominant intermolecular force between ethane molecules? Group of answer choices dipole forces dispersion forces hydrogen bonds ionic bonds
The predominant intermolecular force between Ethane is dispersion forces.
The Ethane molecule has the formula CH₃CH₃.
Usually the strongest intermolecular force is hydrogen bonding but in the case of Ethane molecule the strongest intermolecular force is dispersion forces.
The dispersion forces also known as London dispersion forces is the weakest intermolecular force this is the force that is a temporary attractive force which results when the polarization occurs between the atoms of the molecule.
This same intermolecular force is observed in the molecule of Ethane.
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Use the law of conservation of mass to explain why the equation 2 H2 + O2 = 2 H2O balanced
The colour of chromium
Answer:
Chromium appears Silvery grey in color, with a highly polished surface.
When Chromium is heated it forms a green color Chromic oxide.
find the quantity of a gas in moles if 6.38 l at 358oc has a pressure of 955 torr. group of answer choices 0.285 mol 207 mol 0.155 mol 0.273 mol 6.45 mol
Given that,
P = 955 torr = 1.25658 atm
V= 6.38 L
T = 358 C = [273 + 358] K
n= PV/RT
= 1.25658 atm *6.38 L/0.0821 L atm/Molk * [273 + 358] K
=0.155 mol
Result:
number of mols = 0.155 mol
One of the four fundamental states of matter is gas. A pure gas can be composed of individual atoms, elemental molecules composed of one type of atom, or complex molecules composed of several atoms. A gas mixture, like air, has a number of pure gases.
A gas is a fluid with no defined size or shape. When a gas is enclosed in a closed container, it expands to fill the container. The air you breathe is an example of a gas. The most common type of gas is air (the air we breathe is a gas). It is also a mixture of several gases, including nitrogen, oxygen, and carbon dioxide.
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draw the final organic product of the following three-step reaction of bromomethylbenzene.
The final organic product on reaction of bromomethylbenzene is carbonyl compound of ketones.
What are ketones ?
Your body produces ketones, which are acids, when it burns fat for energy. Your body's cells typically use blood glucose (sugar) as an energy source. Consuming carbohydrates provides you with glucose. Your body will burn fat for energy if your cells can't receive enough glucose. This procedure results in ketones.
The substance sodium cyanide is nucleophilic. As a result, CN behaves as a nucleophile. The bromine on the benzyl chloride molecule will act as a leaving group, which causes Br to be replaced with CN. The SN2 substitution reaction is used to carry out this reaction and 4 – bromobenzyl cyanide is formed in the 1st step.
In the next step 4 – bromobenzyl cyanide undergoes two step reaction with grignard reagent and hydronium ion. and give rise to final product which is a ketone.
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What is the pOH when 10 mL of 0.2 M CH3NH2 (pKb = 3.36) is titrated with 10 mL of 0.1 M HCl?
The solution of the base would have a pOH of 3.66 when titrated.
What is the pOH of the base?We know that pOH can be obtained from the concentration of the base and we can be able to work out the pOH when we attempt to apply the Henderson–Hasselbalch equation to a basic solution.
Number of moles of the salt = 10/1000 * 0.2 M
= 0.002 moles
Number of moles of the acid = 10/1000 L * 0.1 M
= 0.001 moles
Total volume = 10 mL + 10 mL = 20 mL or 0.02 L
Molarity of the salt = 0.002 moles/0.02 L
= 0.1 M
Molarity of the acid = 0.001 moles/0.02 L
= 0.05 M
Then;
pOH = pKb + log (salt/base)
pOH = 3.36 + log( 0.1 M/0.05 M)
pOH = 3.66
The pOH of the system is 3.66
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mass of 400ml beaker
Empty 400-mL beaker weight in grams: 130.778 g. glass and is lab, food and dishwasher safe.
What does a 500 ml beaker weigh?The 500 ml beaker weighs 250 g when it is empty & 645 g when it is full of an unidentified liquid.
A 400 mL beaker's height is how tall?Beaker is 5.1" tall and has a inner and outer size of 67.5mm and 70mm, respectively.The heat tolerances for Eisco Lab Borosilicate 3.3 Glass are as follows:-515°C for strain, 565°C for annealing, and 820°C for softening.
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What factors qualify a compound as a salt? Specify which of the following compounds are salts:CH 4,NaF,NaOH,CaO,BaSO4,HNO3,NH3,KBr.
An ionic compound consisting of a cation of a base and an anion of an acid can be called a salt. Base is a proton (H+) acceptor.
acid ionizes in water, releasing one negative ion other than hydrogen ions and hydroxide (OH-). NaF, BaSO4, and KBr are salts.
Salts are ionic compounds composed of a cation from a base and an anion from an acid.
What is salt?
In chemistry, a salt is a compound composed of an ionic arrangement of positively charged cations and negatively charged anions, resulting in a compound with no net charge. A common example is table salt, which contains positively charged sodium ions and negatively charged chloride ions.
The ions in salt compounds can be either inorganic, such as chloride (Cl-), or organic, such as acetate (CH3COO-). Each ion is either a monoatomic like fluoride (F-) or a polyatomic like sulfate (SO2-4).
Therefore, An ionic compound consisting of a cation of a base and an anion of an acid can be called a salt. Base is a proton (H+) acceptor.
acid ionizes in water, releasing one negative ion other than hydrogen ions and hydroxide (OH-). NaF, BaSO4, and KBr are salts.
Salts are ionic compounds composed of a cation from a base and an anion from an acid.
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IF6+ and IF6- both have an octahedral molecular shape (point group Oh). Draw Lewis structures for both including all valence electrons and formal atom charges. Based on Lewis and VSEPR theories, are the molecular geometries expected or unexpected?
For each atom in a Lewis structure, you should count how many electrons it "owns" in order to get the formal charges. All of its lone pair electrons as well as 50% of its bonding electrons should be counted. The formal charge is the discrepancy between the atom's number of valence electrons and the number it possesses.
The formula FC = VE - [LPE - 12(BE)], where VE is the number of valence electrons on the free atom, LPE is the number of lone pair electrons on the atom in the molecule, and BE is the number of bonding (shared) electrons around the atom in the molecule, can be used to determine an atom's formal charge.
How can molecular shape predictions be made using VSEPR theory?The VSEPR hypothesis, which describes the valence shell electron-pair repulsion, allows us to forecast the molecular structure, including the approximate bond angles around a central atom, can be determined by counting the bonds and lone electron pairs in the molecule's Lewis structure.
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Which compound will contain the most polar bond? A. bromoethane, H3CCH2Br B. ethene, H2CCH2 C. ethane, H3CCH3 D. chloroethane, H3CCH2Cl
The compound that will contain the most polar bond is D. chloroethane, H3CCH2Cl. This is because the bond between the carbon and chlorine atoms is more polar than the bonds between the carbon and hydrogen atoms in the other compounds. The polarity of a bond is determined by the difference in electronegativity between the atoms involved in the bond. Chlorine has a higher electronegativity than carbon, so the bond between them will be more polar. The other compounds listed have bonds between carbon and hydrogen atoms, which have a smaller difference in electronegativity and are therefore less polar.
Which of the following has a standard Gibbs free energy of formation equal to zero? (i) Br2le) (ii) O2 (ii) NaOH (s) O (ii) only O (i) only O (i) and (ii) O (ii) and (iii) O (i), (ii), and (iii) O (ii) only
Answer:
3
Explanation:
there element are approximately together and substitute themselves
What happens to atomic radius on going from left to right in a period in a periodic table?
A. Remains constant
B. Decreases first and then remains constant
C. Decreases
D. Increases
a student pipetted exactly 50.00 ml of 0.1038 m hcl into a 250-ml erlenmeyer flask containing 0.3735 g of an antacid tablet. the solution was heated and boiled to remove any co2. approximately 25 ml of water and three drops of phenolphthalein indicator was added to the erlenmeyer flask containing the hcl and antacid tablet. a 50 ml buret was rinsed and filled with a 0.1017 m naoh solution. the initial volume of the buret was read and recorded as 2.30 ml. the naoh solution was carefully added to the antacid/hcl solution until a permanent very slight pink coloration was noticed. the buret was read again and recorded as 22.82 ml. calculate the acid equivalent (g hcl/g antacid) of the antacid tablet.
The acid equivalent of the antacid tablet is 0.303 g HCl/ g antacid.
What is mole?
In chemistry, the term "mole" (sometimes written "mole") refers to a standard scientific unit for measuring vast amounts of extremely small objects like atoms, molecules, or other specific particles.
The mole represents 6.02214076 × 10²³ units, an astronomically huge number.
We have,
Total moles of HCl added = 0.1038 M × 50.0 mL × 1L/1000mL
= 0.00519 mol
Now, volume of NaOH used = 22.82mL - 2.30 mL
= 20.52 mL
Moles of NaOH used = 0.1017 M × 20.52 mL × 1L/1000mL
= 0.00209 mol
Moles of HCl that reacted with antacid = 0.00519 - 0.00209 mol
= 0.0031 mol
Total mass of HCl reacted = 0.0031 × 36.45g HCl / 1mol HCl
=0.113 g
Acid equivalent of antacid tablet = 0.113g HCl / 0.3735g antacid
= 0.303 g HCl/ g antacid.
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OuICOMES 4. Give the number of core electrons for Cd, A) 44 B) 48 C) 46 D) 45 E) 47 5. Give the number of valence electrons for Cd A) 8 B) 10 C) 12 D) 2 E) 6
Option (c) and option (d) are correct. Number of core electrons for Cd is 46 and valence electrons for Cd is 2.
Core electrons defined as the electrons in an atom that are not valence electrons and do not participate in chemical bonding. The nucleus and the core electrons of an atom form the atomic core. Core electrons are tightly bound to the nucleus.
Core electrons = total number of electrons - valence electrons
Valence electrons are the electrons in the outermost shell or energy level of an atom
Valence electrons = electrons in outer shell
Electronic configuration of Cd = [Kr] 5s2 4d10
The highest principal number is 5 which have 2 electrons . Therefore valence electrons is 2.
Core electrons for Cd = 48 - 2 = 46
so, the number of valence electrons for cd is 2.
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The vapor pressure of 1-propanol is 10.0 torr at 14.7 %C. Calculate the vapor pressure at 52.8 'C_ Given: Heat of vaporization of 1-propanol = 47.2 kJlmol. (Chapter 11)
The pressure that is applied to the walls of a sealed container when a chemical inside of it evaporates is known as vapor pressure in chemistry.
Use the Clausius-Clapeyron equation to get the vapor pressure at a specific temperature:
Propanone's vapour pressure is computed and expressed in degrees Celsius. When the rate of vapor is estimated using propanone at 50°C, the end result is a 78° vapour pressure. As a result, the vapor pressure is 78°.
Calculating pressure involves dividing the force by the area. or pressure force area Text pressure equals force times area, sometimes known as , or pressure equals areaforce.
At 25 °C, the vapor pressure of water is 0.0313 atm, or 23.8 mm of mercury.
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Determine the total number of valence electrons and draw the Lewis Structure for SF3+. Assign formal charges and determine the electronic geometry and molecular geometry of the central atom
FORMAL CHARGE ON S = +1
Electronic Geometry is Tetrahedral
Molecular Geometry is Trigonal Pyramidal
What is Lewis structure?Lewis structures, often referred to as Lewis dot formulas, Lewis dot structures, electron dot structures, or Lewis electron dot structures (LEDS), are diagrams that depict the interactions of atoms inside molecules as well as any lone pairs of electrons that may be present. Any molecule with a covalent link, as well as coordination compounds, can have a Lewis structure. Gilbert N. Lewis, who first described it in his 1916 article The Atom and the Molecule, gave the Lewis structure its name. Lewis structures add lines between atoms to represent shared pairs in a chemical bond, extending the idea of the electron dot diagram.
Total number of valance electrons in SF3+
= 6(S) + 3 × 7(F) - 1(charge)
= 26 electrons
FORMAL CHARGE ON S = +1
Electronic Geometry is Tetrahedral
Molecular Geometry is Trigonal Pyramidal
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How many atoms are in 15.6 grams of silicon? 0.555 3.34 x 1023 2.64* 1026 438
The atoms that are in 15.6 gms of silicon are 3.66×10^23 present in the atoms.
Silicon (Si) has an atomic quantity of 14 and used in lots of present day devices. Its packages are huge and varied, from glass home windows to feeding bottles, incorporated circuits to enamels.
The quantity of atoms in 15.6 grams of silicon. To begin the molar mass of silicon needs to be regarded that's 28.1 gmol.Using this information, convert the mass of the silicon into moles as proven below:15.6 g (128.1gmol)=15.628.1 mol=0.5551601423≈0.555 mol.Using the reality that one mole is identical to 6.602×1023 atoms, convert the moles of silicon into the quantity of atoms as proven:0.555 mol(6.602×10^23 atoms1 mol)=(0.555)(6.602×10^23) atoms=3.66411≈3.66×10^23 atoms.There are 3.66×10^23 atoms in 15.6 grams of silicon.Read more about silicon;
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