The pennies contain a lot of copper thus they are called "coppers".
Why are they called coppers?The coins are used as money. They can be looked upon as metallic money. The pennies are one of the coins that we have and they are therefore a unit of money.
The pennies are composed mostly of copper. The full components of the pennies are; 95% copper and 5% tin and zin. It is thus clear that in the penny coin, the metal that has the greatest percentage is copper hence they are called "coppers".
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the pressure 10.0 m10.0 m under water is 199 kpa.199 kpa. what is this pressure in atmospheres (atm)?
The pressure 10.0m under water is 199kpa. This pressure in atm is 1.96atm.
It's important to keep in mind that an atmosphere is the average pressure that the atmosphere exerts at sea level.
You are aware that the definition of pressure is "force per unit of surface." 1 pascal, or 1Pa, of pressure results from exerting a force of 1N on a surface measuring one square meter. 1 kilopascal, or kPa, is equal to precisely 1000 Pa. You require precisely 101.325 kPa to obtain a pressure of 1 atmosphere, or 1 atm. This indicates that you will experience pressure that is similar to:
199kPa x 1atm / 101.325 kPa = 1.96atm.
Hence the required pressure at 10m underwater is 1.96atm.
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3. calculate the molarity of a solution that is prepared by dissolving 2.24 grams of naoh in enough deionized water to make 500.0 ml of solution? the molar mass of naoh is 40.0 g. molarity
The molarity is 0.112 M. if that is prepared by dissolving 2.24 grams of naoh in enough deionized water to make 500.0 ml of solution .
What is molarity and its SI unit?Molarity is mathematically defined as Molarity = Number of moles of solute Volume of solution in litre. As the number of moles solute is measured in mol and the volume of solution will be in litre . So, the unit of molarity is mol L - 1 .
Is 1M molarity?Molarity also known as molar concentration and is represented by “M”. For example, solution of 1M of sodium chloride dissolved in water has a molarity of 1M. A number of moles of solute can be calculated by dividing mass by the molecular weight of the solute.
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is it possible for two different compounds to be made from the exact same two elements CK12-Foundation
Answer:
Yes, they are called isomers. “Each of two or more compounds with the same formula but a different arrangement of atoms in the molecule and different properties.”
Explanation:
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how many ml of 95% w/w sulfuric acid having a specific gravity of 1.820 should be used in preparing 2 liters of 10% w/v acid?
The concentration of the sulfuric acid (95% w/w) and its specific gravity, we need to calculate the mass of sulfuric acid required to make 2 liters of 10% w/v acid.
What is sulfuric acid?Sulfuric acid (H2SO4) is a strong mineral acid, which is commonly used in a variety of industrial and chemical applications. It is a colorless, dense, oily liquid that has a highly corrosive nature and a strong sour odor. Sulfuric acid is composed of sulfur, hydrogen, and oxygen and is highly reactive, forming strong bonds with other compounds. It is a strong oxidizing agent, and its reaction with water produces heat and hydrogen gas. It can react with both organic and inorganic compounds and is commonly used to manufacture fertilizers, dyes, oils, and detergents. Sulfuric acid is also used in the processing of many metals, including copper, lead, and zinc.
The mass of sulfuric acid required = (2 liters * 10g/100ml * 1.820 g/ml) = 36.4 g
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predict the organic product formed when bzcl reacts with cyclohexanol. bzcl = benzoyl chloride.
The organic product formed when benzoyl chloride reacts with cyclohexanol is Isopropyl cyclohexyl benzoat
The reaction between benzoyl chloride and cyclohexanol is esterification reaction. Benzoyl chloride on reaction with alcohols give corresponding ester. In this case the ester formed is as follow,
First, benzoyl chloride protonate then cyclohexanol attacks positively charged carbon at the alpha position via a nucleophilic reaction. Alcohol oxygen is produced via a proton transfer from an acid oxygen attack's free electron. The discharge of a water molecule A H⁺ is released and the double bond between the acid alpha carbon and oxygen is restored. An Cyclohexyl benzoat is produced.
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Why was the actual acceleration of mass a you calculated in question 2d less than the expected acceleration calculated in question 2a?
While acceleration generally decreases as mass increases, it tends to increase as force increases.Therefore, the greater force acting on more massive objects is counteracted by the enhanced inverse effect of mass.
What relationship do you suppose exists between the two masses and the rate that the heavier object descends?It is obvious from the expression above that the acceleration will be higher with a larger difference in masses.Therefore, the heavier object will move faster if the difference in mass between the two objects is higher.
Why does having less mass make acceleration easier?Mass times acceleration equals force.Therefore, the force needed to move anything will be less the smaller the mass.Additionally, less force is needed the slower your move the object.
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the mass of 10 ml of a liquid is 10.112 g. what is the density if the liquid is water? 1.011 g/ml when 1.000 g of sucrose is added to the liquid, what is the density if the liquid is a sucrose solution? 1.112 g/ml which density is a physical property? [ select ] if 0.143 g of sucrose is added to the sucrose solution, does the solution's density change?
Density is a measure of how dense the mass of a substance or object is. Density describes how much space an object or substance takes up (its volume) about the amount of matter in that object or substance (it's mass).
In mathematics and physics, a type of mass is calculated as a mass which is defined as mass divided by volume (Density = Volume Mass).
The values provided in a question:
volume = 10 ml
mass = 10.112 g
Density formula:
ρ = m/v.
ρ = 10.122/10
ρ = = 1.0112 g/ml
So, the density of the liquid in sucrose is 1.0112 g/ml.
When 1.000 g of sucrose is added to the liquid.
ρ = m/v.
ρ = 1000g/10ml
ρ = 100 g/ml
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Which of the following solvents would be good to use for 'H NMR analyses?
a. Acetone
b. dimethyl sulfoxide
c. chloroform-d
d. acetone-d6
e. deuterium oxide
The solvents that can be utilised for proton NMR analysis are deuterium oxide, chloroform-d, and acetone-d6. This is due to the deuteration of all the aforementioned solvents.
What is meant by deuteration?
Deuteration refers to the action of adding deuterium to a molecule and chemical mixture.
What is the process of deuteration?
Chemical deuteration is subjecting complete molecules to fresh water (deuterium oxides) at high pressure and temperature in the presence of an acid catalyst, deuterating them, or using them as the construction blocks for the production of a desired molecule.
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what is the standard potential, in volts, of a galvanic cell made of ce4 and cu2 , given the standard reduction potentials below? (3 points) ce4
The standard potential in volts of galvanic cell would be 1.27 V.
The tendency of a chemical species to be reduced, expressed in volts under normal conditions, is known as the standard reduction potential. The standard reduction potential belongs to the group of potentials known as standard electrodes or standard cells. The difference in voltage between the cathode and anode is known as the standard cell potential. A galvanic cell or voltaic cell is an electrochemical device that transforms the chemical energy of spontaneous redox reactions into electrical energy. electrical cell A voltaic cell is an electrochemical device that produces electricity through chemical processes.
We know that
Ce[tex]_{4}[/tex]+ + e− → Ce[tex]_{3}[/tex]+ Eº = 1.61 V
Cu(s) ==> Cu[tex]^{2}[/tex]+ + 2e Eº = -0.34 V
E of cell = 1.61 + (-0.34) = 1.27 v
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would you expect mno4-(aq) to react with nai in acidic or in basic solution?
A basic solution would cause MnO4-(aq) and NaI to react. NaI and MnO4-(aq) will not combine in an acidic solution.
An acidic solution is what?An acidic solution is one that has more positively charged hydrogen ions (H) than negatively charged hydroxide ions (OH). Acids come in many forms, two of which are vinegar as well as lemon juice. An acid has fewer OH electrons than a base. Common examples are baking powder and household ammonia.
What are the top three acidic solution types?That honor goes to fluoroantimonic chemical, a superacid mixture of hydrogen chloride containing antimony pentafluoride. Lemon zest, acidity, 0.1 M HCl, and any amount of an acid in water are examples of acidic solutions.
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how many valence electrons is is 4.78 million kg of sulfur please show ur work with dimensional analysis
The number of valence electrons that would be in 4.78 million kg of sulfur would be 5.3078 x [tex]10^{32[/tex] valence electrons.
What are valence electrons?Valence electrons are the electrons that are present in the outermost shell of atoms. Each atom of sulfur has 6 valence electrons.
Now, we need to find the total number of atoms that would be present in 4.78 million kg of sulfur.
According to Avogadro, 1 mole of any substance contains 6.022 x [tex]10^{23[/tex] atoms.
4.78 million kg of sulfur = 4,700,800 kg = 4,700,800,000 grams
Mole = mass/molar mass
Mole of 4,700,800,000 grams sample of sulfur = 4,700,800,000/32
= 146900000 moles
146900000 moles = 146900000 x 6.022 x [tex]10^{23[/tex] atoms
= 8.8463 x [tex]10^{31[/tex] atoms
Now each atom of sulfur contains 6 valence electrons. Thus, total number of valence electrons would be:
6 x 8.8463 x [tex]10^{31[/tex] = 5.3078 x [tex]10^{32[/tex] valence electrons
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If we react 10 moles of hydrogen with 6 moles of oxygen. what is the limiting reagent and how much water is produced?
The limiting reagent in this reaction is hydrogen because it is the reactant that is used up first.
The balanced equation for the reaction between hydrogen and oxygen to form water is:
2H2 + O2 -> 2H2O
To react 10 moles of hydrogen with 6 moles of oxygen, we will also need 6 moles of oxygen.
Since we have enough hydrogen and oxygen to react completely, we can calculate the number of moles of water produced.
10 moles of H2 will react to produce 10 moles of H2O and 6 moles of O2 will react to produce 3 moles of H2O. Therefore, the total amount of water produced is 10 + 3 = 13 moles of water.
if each water molecule donates one electron, what mass of water lost an electron to the lightning? one mole of water has a mass of 18 g.
(-25C / 1) 1 electron divided by 1.60x 1019 C results in 1.6 x 1020 electrons. Water has a mass of 18 g per mole. (1 / (1.6 x 1020 electrons) 1 molecular to 1 electron (6.02 x 1023 molecules/one mole) 4.8 x 103 g = (18g/mole)
An electron is who or what it is:It is possible for an electron, a negatively charged subatomic particle, to be either free or bonded to an atom (not bound). An electron is attached to an atom and is one of the three major types of particles in an atom.
What are the functions of atoms and electrons?A positively charged atom's structural constituents are called electrons. An atom's total negative charge of its electrons equals the positive charge of its protons in the atomic nucleus.
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a student is given the task of determining the concentration of a propanoic acid solution of unknown concentration. a 0.173 m naoh solution is available to use as the titrant. the student uses a 25.00 ml volumetric pipet to deliver the propanoic acid solution to a clean, dry flask. after adding an appropriate indicator to the flask, the student titrates the solution with the 0.173 m naoh, reaching the end point after 20.52 ml of the base solution has been added. calculate the molarity of the propanoic acid solution
The propanoic acid solution has a molarity of 0.142 M.
Is molarity same as concentration?Molar concentration, also called as molarity, quantity concentration, or substance ability to focus, is a unit used to quantify the amount of a solute in a solution expressed as a percentage of its volume.
The chemical reaction carried out here is given by, CH3 CH2COOH + NaOH → CH3CH2COONa+H2O
We can observe from the above balanced reaction that 1 mol of propanoic acid may neutralize 1 mol of NaOH.
Given that,
Molarity of NaOH M(1) = 0.173 mol/L
Volume of NaOH added to reach the end point, V(1) = 20.52 mL = 0.02052 L
Hence, No.of moles of NaOH added is given by,
n = M(1) X V(1) = 0.173 mol/L x 0.02052 L
n=3.54996 x 10-3 mol
This will be equal to the no.of mole of propanoic acid reacted.
Given that the volume of the propanoic acid,
V(2) = 25.00 mL = 0.025 L
Hence, molarity of the propanoic acid is given by,
M(2) n/V(2)= 3.54996 x 10^-3 mol /0.025 L
M2 = 0.142 mol/L = 0.142 M
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1. how do the following physical properties depend on the strength of intermolecular forces? a. surface tension b. viscosity c. melting point d. boiling point e. vapor pressure
The option is e. vapor pressure. Intermolecular forces are the forces that connect two molecules. The strength of intermolecular forces influences physical properties.
As intermolecular forces increase, so do melting, boiling, and freezing points. As intermolecular forces increase, vapor pressure decreases. The greater the intermolecular force. A mixture of intramolecular and intermolecular forces holds atoms, molecules, and compounds together. The bonds that hold atoms within a molecule, such as covalent, ionic, and metallic bonding, are referred to as intramolecular forces. The greater the forces acting on the surface particles, the greater the surface tension. As a result, the magnitude of the intermolecular forces influences this property.
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how many grams of methanol are produced when 7.0 grams of carbon monoxide reacts with 2.5 grams of hydrogen gas?
≈ 0.008 mol CH3OH
Hence the correct answer is 0.008 mol.
The statement of mass (grams) of methanol is "0.008 g."
What is mass?
A substance is something to do with mass that takes up space. The mass of a compound is the total amount of atoms present in grams that make up a molecule. The grams is the unit of mass.
The balanced equation comes out to be,
CO(g) + 2H2(g) → CH3OH(l)
In order to calculate the mass of methanol, initially the moles of the substance to be calculated from the given mass of CO and H2.
Gram to mole conversion,
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you have been asked to develop a 2m solution of naoh that will be used in an acid-base neutralization reaction for emergency spill response. if you need to have 1 l of the solution available, how much naoh will you need to dissolve in water to achieve this concentration?
To make a 2M solution of NaOH, you will need to dissolve 2 moles of NaOH in every liter of water.
What is dissolve?Dissolve is a process in which a solid substance is broken down into smaller particles and mixed with a liquid so that it becomes evenly distributed. This process can be used to mix ingredients, create a solution, or even to form a new substance. Dissolving occurs when the molecules of a solid substance become attracted to the molecules of a liquid. The combination of the two materials results in the liquid taking on the properties of the solid.
Since you need 1L of the solution, you will need to dissolve 2 moles of NaOH in that liter of water.
This means that you will need to add 40g of NaOH (2 moles x 20 g/mol) to 1 liter of water to achieve a 2M solution.
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5 H2O2 (aq) + 2 MnO4 - (aq) + 6 H+ (aq) → 2 Mn 2+ (aq) + 8 H2O (l) + 5 O2 (g) . In a titration experiment, H2O2 (aq) reacts with aqueous MnO4 - (aq) as represented by the equation above. The dark purple KMnO4 solution is added from a buret to a colorless, acidified solution of H2O2 (aq) in an Erlenmeyer flask. (Note: Ath the end point of the titration, the solution is a pale pink color.)
In the titration you described, the unknown solution is an acidified hydrogen peroxide (H2O2) and the known solution is a dark purple solution of potassium permanganate (KMnO4). The reaction between these two solutions is represented by the balanced equation you provided:
5 H2O2 (aq) + 2 MnO4 - (aq) + 6 H+ (aq) → 2 Mn 2+ (aq) + 8 H2O (l) + 5 O2 (g)
Titration is an experimental technique used to determine the concentration of a solution of an unknown concentration by slowly adding a solution of a known reactant concentration until a specific reaction endpoint is reached.
The endpoint is typically indicated by a change in color, pH, or the formation of a precipitate, among other things.
When the endpoint of the titration is reached, the solution is a pale pink color, indicating that the reaction between the H2O2 and KMnO4 is complete.
From the balanced equation and stoichiometry, we know that for every five molecules of H2O2, two molecules of MnO4- are needed to neutralize it. So the number of moles of KMnO4 used in the titration is directly related to the number of moles of H2O2 present in the solution.
The concentration of H2O2 can be calculated by dividing the number of moles of H2O2 by the volume of the solution.
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calculate the concentration (% m/v) of nacl solution that was made by dissolving 12.7 g of sodium chloride in enough water to make 2.3 l of solution.
The concentration (% m/v) of NaCl solution that was made by dissolving 12.7 g of sodium chloride in enough water to make 2.3 l of solution is 0.55%.
Concentration, often represented by the symbol "C," refers to the amount of a specific substance (solute) present in a given amount of another substance (solvent). There are different ways to express concentration, including molarity, molality, and mass percentage (%, w/v, or % m/v).
% m/v (mass percentage by volume) is a way to express the concentration of a solution in terms of the mass of solute (in grams) present in a given volume of solvent (in mL). It is calculated by multiplying the mass of the solute by 100 and then dividing that result by the volume of the solution. The unit for % m/v is % (percentage).
It is calculated by the following formula:
% m/v = (mass of solute / volume of solution) x 100
In our case, the mass of the solute is 12.7 g while the volume of the solution is 2.3 l or 2300mL.
% m/v = (mass of solute / volume of solution) x 100
% m/v = (12.7 / 2300) x 100
% m/v = 0.55%
Hence, the concentration expressed as (% m/v) is 0.55%.
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na2so4(aq) cacl2(aq) - caso4(s) 2nacl(aq) now that we have a balanced chemical equation, let's write the ionic equation: [] a. na2so4(aq) b. 2na (aq) so4 (aq) c. na (aq) s0 - (aq) d. na2so4(s)
For the balanced equation na2so4(aq) cacl2(aq) - caso4(s) 2nacl(aq) the ionic equation is in the order of B, D , A ,A
To write the ionic equation for the reaction: Na2SO4(aq) + CaCl2(aq) → CaSO4(s) + 2NaCl(aq). we need to separate the strong electrolytes (ions) from the weak electrolytes (molecules) and the insoluble compounds (precipitates).
a. Na2SO4(aq) is a strong electrolyte, so it will dissociate into its ions in water:
Na2SO4(aq) → 2Na+(aq) + SO4²-(aq)
b. CaCl2(aq) is also a strong electrolyte, so it will dissociate into its ions in water:CaCl2(aq) → Ca²+(aq) + 2Cl-(aq)
c. CaSO4(s) is an insoluble compound and will not dissociate into ions, so it is written as it is.
d. NaCl(aq) is a strong electrolyte, so it will dissociate into its ions in water: NaCl(aq) → Na+(aq) + Cl-(aq) So the final ionic equation is: 2Na+(aq) + SO4²-(aq) + Ca²+(aq) + 2Cl-(aq) → CaSO4(s) + 2Na+(aq) + 2Cl-(aq)It's worth noting that the coefficients in the balanced equation are the same in the ionic equation, this is because the coefficients represent the number of moles of the reactants and products, and ions are not affected by the chemical reactions.
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What will always make atoms of one element different from all the other elements?
Atoms of one element will always be different from all the other elements because of their atomic number.
The atomic number is the number of protons in the nucleus of an atom. Each element has a unique atomic number, which determines the number of protons in the nucleus and, in turn, the number of electrons that orbit the nucleus. It defines the chemical properties and behavior of an element.
For example, Hydrogen has an atomic number of 1, and Helium has an atomic number of 2.
Because of this unique number of protons, the atoms of each element have unique properties and behave differently in chemical reactions.
It's worth noting that, isotopes of an element have the same atomic number, but different number of neutrons in the nucleus, this gives them the same chemical properties but different physical properties, like atomic mass.
Choose the proper whole-number coeffi-
cients for each substance to yield a balanced
equation.
d
1. 2, 1, 2
2.1, 1, 1
3. 1, 2, 1
4. 2, 1,1
The correct whole-number coefficients for each substance are required to produce a balanced equation. 2, 1, 2 (option 1). (option 1).
A balanced equation is what?When mass is preserved and the number of atoms of each element on either side of the equation is equal, the chemical equation is said to be balanced.
Give an example of the balance equation.Think of the response, for instance: 2Mg(s) + O2 (g) 2MgO (g) On both sides of the reactant and product in this reaction are two atoms each of magnesium and oxygen. Determining that the reaction mechanism is a balanced equation equation, it follows the law of conservation of mass.
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Determine the equivalent resultant couple moment about point O.
Enter the x, y, and z components of the moment separated by commas using three significant figures.
The equivalent resultant couple moment about point O is -1300i+525j +1375k.
Net force definition.The total of all the forces acting on an object is known as the net force. Mass can be propelled forward by net force. A body is subject to some other force whether it is at rest or in motion. When there are numerous forces acting on a system, the net force is used.
F1 = -300k
F2 = -300 k
F3= 200j +450j -350k
r1 = 2j
r2 = 1.5 i +3.5j
r3 = 1.5i +2j
Net force F = F1+F2+ F3 = -200i + 650j -650k
Equivalent resultant force calculation using vector sum.
Step 2/2
Equivalent moment M = r₁ x F₁ + 2 x F₂ + r3 x F3
M = [(2j))x (-300 k) + (1.5 i +3.5j)x(200j) +(.5i +2j) x( -200i +450j-350k)]
M= (-600i) +(300k) +(-700i +525 j+ 1075k)
M = -1300i +525j +1375 k
Net force F = -200i + 650 j-650 k
Equivalent moment M
M = -1300i +525 j +1375 k
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For each of the following reactions, calculate ΔH∘rxn, ΔS∘rxn, and ΔG∘rxn at 25 ∘C. State whether or not the reaction is spontaneous. If the reaction is not spontaneous, would a change in temperature make it spontaneous? If so, should the temperature be raised or lowered from 25 ∘C?Part A2CH4(g)→C2H6(g)+H2(g)Express your answer to one decimal place.Part BCalculate ΔS∘rxn at 25 ∘C.Express your answer to one decimal place.Part C2NH3(g)→N2H4(g)+H2(g)Express your answer to one decimal place.Part DCalculate ΔS∘rxn at 25 ∘C.Express your answer to one decimal place.Part EN2(g)+O2(g)→2NO(g)Express your answer using three significant figures.Part F Calculate ΔS∘rxn at 25 ∘C.Express your answer to one decimal place.ΔS∘rxn = J/KPart G2KClO3(s)→2KCl(s)+3O2(g)Express your answer to one decimal place.Part HCalculate ΔG∘rxn at 25 ∘C.Express your answer to one decimal place.
Part A: ΔH∘rxn = −84.2 kJ/mol, ΔS∘rxn = −127 J/Kmol, ΔG∘rxn = −92.4 kJ/mol. The reaction is spontaneous.
What is spontaneous?A spontaneous process in thermodynamics is one that occurs with none external input from outside the system. A more technical definition seems to be the time-evolution of such a system in which free energy is released and the system moves to a lower, extra thermodynamically constant energy state. The sign convention for free energy change is based on the typical general assembly for thermodynamic measurements, in which the release of exciton from the system corresponds to the a negative change in the system's free energy and a positive change with in free energy of the surroundings.
Part B: ΔS∘rxn = −159.2 J/Kmol
Part C: ΔH∘rxn = −9.7 kJ/mol, ΔS∘rxn = −166.3 J/Kmol, ΔG∘rxn = −19.2 kJ/mol. The reaction is spontaneous.
Part D: ΔS∘rxn = 191.7 J/Kmol
Part E: ΔH∘rxn = 180.5 kJ/mol, ΔS∘rxn = 162.6 J/Kmol, ΔG∘rxn = 17.9 kJ/mol. The reaction is not spontaneous. Raising the temperature would make it spontaneous.
Part F: ΔS∘rxn = 205.3 J/Kmol
Part G: ΔH∘rxn = −133.7 kJ/mol, ΔS∘rxn = −203.4 J/Kmol, ΔG∘rxn = −321.7 kJ/mol. The reaction is spontaneous.
Part H: ΔG∘rxn = −321.7 kJ/mol. The reaction is spontaneous.
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Rank the following ions in order of increasing basicity. Be sure to answer all parts.
CH3CH2^-
CH3NH^-
CH3O^-
In order of increasing basicity, CH3O^- < CH3NH^- < CH3CH2^-
What distinguishes basicness from basicness?HSO has a basicity of 2, as it may produce two H+ ions. If a molecule can give an OH- ion, receive an H+ ion, or give a lone pair of electrons in solution, it is considered to have basic character. Base examples include NaOH, NH3, etc. Basicity and basic character are very separate concepts.
What factors determine basicity?The position of the nitrogen atom's electron pair, the degree to which it has been hybridized, and the viability of resonance stabilization all affect how basic heterocyclic amines are. The electron pair in pyrrole is a component of the aromatic system. Pyrrole is hence a fairly weak base.
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A gold-colored ring has a mass of 18.9 grams and a volume of 1.12 mL. Is the ring pure gold? (The density of pure gold is 19.3 g/mL.)
Answer:
No. The density of the gold-colored ring is 16.9 g/mL, which is less than that of pure gold, whose density is 19.3 g/mL. Therefore, the ring is not pure gold.
Explanation:
Density is an intrinsic property of a substance, which means that it is a characteristic of the substance that is independent of the size or amount of the sample. This makes density a useful property for identifying a substance, such as gold, as it can be determined for any size or amount of the sample.
In this question, by comparing the density of the ring to the known density of pure gold, we can determine whether the ring is pure gold. If the ring had the same density as pure gold, we would conclude that it is pure gold.
The density of a substance can be calculated by dividing its mass by its volume, both of which are provided:
Density = mass / volume
The density of the ring = 18.9 g / 1.12 mL = 16.9 g/mL
The known density of pure gold is 19.3 g/mL. Since the density of the ring is less than the density of pure gold, the ring is not pure gold.
Construct the octahedral crystal-field splitting diagram for the metal in each species. V(H_2O)_6^3+ Co(CN)_6^3- Mn(H_2O)_6^2+
The d orbitals are divided into two subgroups in the octahedral crystal field: three t2g and two eg orbitals that are spaced apart by energy.
What does octahedral mean?the octahedral complex's crystal field splitting. When a ligand is present, crystal field splitting is the splitting of a degenerate level. The energy gap between the t2g & eg levels is represented by "o." .
What is an octahedral mineral?A closed crystallographic structure with eight equilateral triangle-shaped faces and isometric symmetry; often known as a regular octahedron to distinguish it from the more general definition provided below. commonly seen in isometric minerals including diamond, pyrite, fluorite, and magnetite.
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The d orbitals are divided into two subgroups in the octahedral crystal field: three t2g and two eg orbitals that are spaced apart by energy.
What does octahedral mean?the octahedral complex's crystal field splitting. When a ligand is present, crystal field splitting is the splitting of a degenerate level. The energy gap between the t2g & eg levels is represented by "o." .
What is an octahedral mineral?A closed crystallographic structure with eight equilateral triangle-shaped faces and isometric symmetry; often known as a regular octahedron to distinguish it from the more general definition provided below. commonly seen in isometric minerals including diamond, pyrite, fluorite, and magnetite.
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For the following electrochemical cell Co(s)|Co2+ (aq, 0.0155 M)||Ag+ (aq, 1.50 M)|Ag(s)
write the net cell equation. Phases are optional. Do not include the concentrations.
The net cell equation for the electrochemical cell Co(s)|Co2+ (aq)||Ag+ (aq)|Ag(s) is: Co(s) + 2Ag+(aq) → Co2+(aq) + 2Ag(s)
The electrochemical cell of Cobalt (Co) consists of two electrodes, one of Cobalt (Co) and the other of Silver (Ag).
The net cell equation for this cell is Co(s) + 2Ag+(aq) → Co2+(aq) + 2Ag(s), indicating that when two moles of Silver ions (Ag+) are combined with one mole of Cobalt (Co), two moles of Cobalt ions (Co2+) and two moles of Silver (Ag) are produced.
This cell reaction is an example of redox (oxidation-reduction) reaction, in which there is a transfer of electrons between the two electrodes.
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Which of these statements is an example of an intensive property?
O Diamond is the hardest known substance.
O There are six crackers per pack.
O The mass of a piece of charcoal is 10g
O The volume of the water is 40mL.
Answer:
both c and d
Explanation:
An extensive property is a property that changes when the size of the sample changes. Examples are mass, volume, length, and total charge.
How many moles are in 1.23 x 1024 atoms of Calcium (Ca)?
The amount of substance of a system which contains as many elementary entities is called as mole. 2.05 moles are in 1.23 x 1024 atoms of Calcium (Ca).
What is mole ?The term mole is defined as the amount of substance of a system which contains as many elementary entities.The mole is called as containing exactly 6.023 × 10 ²³ elementary unit.
The mole is a convenient unit to use because of the great number of atoms, molecules. It is represented by symbol "mol".
1 mole of calcium = 6.023 × 10 ²³
1 mole ⇒ 6.023 × 10 ²³
X ⇒ 1.23 x 10²⁴
X = 12.3 x 10²³ / 6.023 × 10 ²³
= 2.05 moles
Thus, 2.05 moles are in 1.23 x 1024 atoms of Calcium (Ca).
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