This reaction shows that Cu is reduced and Zn is oxidized and the reaction takes place spontaneously.
Those species are reduced readily which has high value of reduction potential. Here, Cu2+ has a reduction.
If the typical electrode potential for a redox reaction, Eo (redox reaction), is positive, the reaction is considered spontaneous. Redox reaction Eo (which is positive) will cause the reaction to move forward (spontaneous). (See voltaic and galvanic cells.)
A spontaneous reaction is one that favors the creation of products under the reaction's current conditions.
Free energy is released during spontaneous reactions, so the sign of G must be negative. There are four different possible combinations because both H and S can be positive or negative depending on the specific reaction's characteristics.
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The empirical formula of a compound is NO_2. Its molar mass is 92 g/mol. What is its molecular formula?
The molecular formula of the compound whose empirical formula is NO₂ is N₂O₄.
The relation between molecular formula and empirical formula is mentioned as follows:
molecular formula = empirical formula × n ......equation 1
where, n is number of building blocks needed to build the molecular formula.
Molar mass of NO₂ = Molar mass of molecular formula = 92 g/mol
Molar mass of one building block = the molar mass of the empirical formula = (1 × 14.0067 g/mol) + (2 × 15.9994 g/mol) = 46.0055 g/mol
Substitute value of molar mass of molecular formula and molar mass of the empirical formula in equation1,
92 = 46.0055 × n
n = 2
Using equation 1 , we get
Molecular Formula = NO₂ × 2
Molecular Formula = N₂O₄
The molecular formula is N₂O₄.
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EXPERIMENT
2:
Kelly and Jack are playing in the park. Jack rolls a marble down the small playground slide.
Kelly proposes the idea that the marble would travel at a faster pace if it is rolled down the longer slide. This
discussion leads to the following scientific question. What happens to the speed a marble travels when the
height of a ramp is changed?
Read the question that Kelly and Jack were trying to answer with their experiment and then write a
possible hypothesis for this experiment.
Hypothesis:
The hypothesis of the experiment is that; The speed a marble travels changes when the height of a ramp is changed.
What is the hypothesis?We know that when we talk about the hypothesis, we are referring to a tentative explanation of a statement that has been made. The hypothesis is the statement that forms the basis for the experiment that we want to carry out.
In this case, we have the idea that the marble would travel at a faster pace if it is rolled down the longer slide and the research question is; What happens to the speed a marble travels when the height of a ramp is changed?
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Why do different solids have differently
shaped solubility
Curves ?
Each solid has a unique solubility curve. This is due to the fact that each solid has a specific temperature at which it becomes soluble.
Why do solubility curves differ?The solubility curve shows how a substance's solubility changes as a function of temperature. The curving line on the graph that depicts the relationship between temperature and a substance's solubility at various temperatures is called the solubility curve.
What a solubility curve's shape represents?The lines on the solubility curve represent a saturated solution, or one in which all of the solute's dissolved volume has been dissolved in 100 g of water.
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assign an oxidation state to each atom in each element, ion, or compound. drag the appropriate items to their respective bins.
The correct response is a) Ag. The oxidation number of an atom of a pure element is 0. The charge an atom would have if the compound were made up of ions is known as its oxidation number.
The oxidation state, often known as the oxidation number, in chemistry refers to the hypothetical charge that an atom would have if all of its links to other atoms were entirely ionic. It describes how much an atom has oxidized (lost electrons) in a chemical complex. The oxidation state can theoretically be positive, negative, or zero. Although nature does not include entirely ionic bonds, it does contain numerous strong ionic bonds, making the oxidation state a reasonable predictor of charge. The formal charge or any other genuine atomic attribute of an atom is not represented by the oxidation state of that atom. This is especially true for high oxidation states, where the amount of ionization energy needed to create a multiply positive ion is much more than the amount of energy available in chemical reactions. A compound's atoms' oxidation states can also change based on the electronegativity scale that was used to calculate them. An atom's oxidation state in a compound is thus just a formalization. Nevertheless, it is crucial to comprehend inorganic compound nomenclature rules. Additionally, a number of chemical reaction findings can be fundamentally described in terms of oxidation states.
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Assign oxidation states to each atom in each element, ion, or compound. a. Ag, b. Ag^+Ag+ c. CaF_2CaF 2 d. H_2SH2S e. CO_3 {2-}CO32− f. \mathrm{CrO}_{4}^{2-}CrO42−
Which material is malleable and conducts electricity?
Metal – bright, malleable, ductile, or a good conductor of electricity and heat.
What is pliable and conducts electricity?Metals may be hammered into sheets and are malleable, ductile, and good conductors for heat and electricity.
What kinds of substances can be molded?When struck with a hammer, malleable metals will twist and bend into a variety of shapes, but non-malleable metals may shatter into fragments.Metals like gold, iron, aluminium, copper, silver, and lead are examples of malleable metals.
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A sample of an unknown compound is vaporized at 150.°C . The gas produced has a volume of 960.mL at a pressure of 1.00atm , and it weighs 0.941g . Assuming the gas behaves as an ideal gas under these conditions, calculate the molar mass of the compound. Round your answer to 3 significant digits.
The molar mass of the unknown compound that vaporizes at 150 °C is 34.81 g/mol
What is the molar mass of a compound?The molar mass of a chemical compound is defined as the mass of a sample of that compound divided by the number of moles in that sample. Its unit of measurement is grams per mole (g/mol) although in the International System of Measurements it should be kilograms per mole (kg/mol).
This is a property closely related to the relative molar mass of a compound and to the standard atomic masses of the constituent elements.
Determination of the molar mass of the unknown gasTo determine the molar mass of the gas, the ideal gas equation was used: PV = nrt, in which
P = Pressure
V = Volume
n = number of moles
R = Gas constant
t = temperature
But previously the moles of the gas are calculated
Calculate the moles of the unknown compoundData
t = 150°C = 423.15K
V = 960ml = 0.96L
P = 1.00 atm
R = 0.082 L Atm / mol °K .
n = ?
PV = nrt
n = PV/rt
n=1. 0.96 / 0.082. 423.15
n = 0.96 / 34.7
n = 0.027 mole
Calculation of the molar mass of the unknown compoundM = m/n
M = 0.94 g/ 0.027 mol
M = 34.81 g/mol
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What is the correctly balanced equation for the reaction of rust?; What is the correctly balanced equation?; What is the correct equation for the reaction of hydrochloric acid and iron?; Which is the correctly balanced equation for the reaction of KOH and h2so4?
The correctly balanced equation for the reaction of rust is 4Fe + 3O₂ + 2xH₂O → 2Fe₂O₃. x H₂O.
The correct equation for the reaction of hydrochloric acid and iron is 2HCl + Fe → FeCl₂ + H₂.
The correctly balanced equation for the reaction of KOH and H₂SO₄ is KOH + H₂SO₄ → K₂SO₄ + H₂O.
A chemical reaction is a process to rearranges the constituent atoms of the reactants to create different substances as products. Rusting is a chemical reaction between iron, water, and air (oxygen gas).
Fe + O₂ + 2xH₂O → Fe(OH)₃A chemical reaction between acid and metal is salt and hydrogen gas.
Hydrochloric acid = HCl → H⁺ + Cl⁻Iron = FeA chemical reaction between acid and base is salt and water.
Base KOH → K⁺ + OH⁻Acid H₂SO₄ → 2H⁺ + SO₄⁻²KOH + H₂SO₄ → K₂SO₄ + H₂OLearn more about balanced chemical reaction here: https://brainly.com/question/26694427
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A gas phase reaction is happening in a closed metal vessel. Identify the surroundings of the reaction. O The metal vessel The room The experiment O The gas
The metal vessel The room The experiment O The gas, The gas which evolve in the reaction is oxygen. A chemical process in which substances interact and transform into another substance.
What is reaction?
A chemical process in which substances interact and transform into another substance, or one substance transforms into another, is called a reaction.
Therefore, The metal vessel The room The experiment O The gas, The gas which evolve in the reaction is oxygen. A chemical process in which substances interact and transform into another substance, or one substance transforms into another, is called a reaction.
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When aqueous solutions of Pb(NO3)2(aq) and KI(aq) are mixed, the products are KNO3(aq) and PbI2(s). What is the net ionic equation for this reaction?Pb(NO3)2(aq)+2KI(aq)⟶PbI2(s)+2KNO3(aq)Pb2+(aq)+2NO−3(aq)+2K+(aq)+2I−(aq)⟶PbI2(s)+2K+(aq)+2NO−3(aq)Pb2+(aq)+2I−(aq)⟶PbI2(s)2K+(aq)+2NO−3(aq)⟶2KNO3(s)
The net ionic equation for the reaction that occurs when solutions of lead(II) nitrate[Pb(NO3)2 ] and potassium iodide(2KI) are combined is:
Pb²⁺(aq) + 2 I⁻(aq) ⇒ PbI₂(s)
The balanced Molecular equation for the reaction of lead nitrate [Pb(NO3)2 ]and Potassium iodide(2KI) is given as ;
Pb(NO3)2 (l) + 2KI (s) → PbI2 (s) + 2KNO3 (l).
Solutions of lead(II) nitrate and potassium iodide were combined and formed double displacement reaction. The complete ionic equation is:
Pb²⁺(aq) + 2 NO₃⁻(aq) + 2 K⁺(aq) + 2 I⁻(aq) ⇒ 2 K⁺(aq) + 2 NO₃⁻(aq) + PbI₂(s)
Removing Spectator ions, that appear both in the reactants and in the products. They do not participate in the reaction thats why they do not appear in the net ionic equation.So, The net ionic equation is:
Pb²⁺(aq) + 2 I⁻(aq) ⇒ PbI₂(s)
The net ionic equation for the reaction of lead(II) nitrate[Pb(NO3)2 ] and potassium iodide(2KI) solution is combined:
Pb²⁺(aq) + 2 I⁻(aq) ⇒ PbI₂(s)
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Al(s)→Al3+(aq)+3e−
Zn2+(aq)+2e−→Zn(s)
The half-reactions for the oxidation-reduction reaction between Al(s) and Zn2+(aq) are represented above. Based on the half-reactions, what is the coefficient for Al(s) if the equation for the oxidation-reduction reaction is balanced with the smallest whole-number coefficients?
2
To calculate the atoms of an element in a given molecule, we need to multiply stoichiometry by the number that is written on the foot of that element. Therefore, coefficient of Al in balanced equation is 2.
What is Balanced equation?Balanced equation is the one in which the total number of atoms of a species on reactant side is equal to the total number of atoms on product side. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, displacement reaction.
The other characteristic of balanced reaction is that physical state should be written with each compound or molecule on reactant and product side. Physical state should be written in brackets. s means solid, l means liquid, g means gas.
Al(s)→Al³⁺(aq)+3e⁻ × 2
Zn²⁺(aq)+2e⁻−→Zn(s) × 3
adding the two equations we get balanced equation as
2Al+3Zn²⁺→ 2Al³⁺ + 3Zn(s)
The coefficient of Al in balanced equation is 2.
Therefore, coefficient of Al in balanced equation is 2.
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Nitrogen and Oxygen form an extensive series of oxides with the general formula NxOy. One of them is a blue solid that comes a part, reversibly. In the gas Phase. It contains 36.84%N. What is the empirical formula of this Oxide? in chemistry
Which of the following is an example of a chemical reaction?A.water evaporating from a pot on a hot stove B.sand being removed from sea water by filtration C.A spoonful of sugar dissolving in a glass of water D.A water solid forming when two clear liquids are poured together
Chemists refer to the process of boiling water as endothermic.It follows that since certain processes need heat, others must also produce heat as they operate.They are referred to as exothermic.
When water is cooked on a stove, would a chemical reaction take place?The water is not performing any chemical reactions when it boils.Even while it boils, the water is still.Simply put, the temperature has altered. Water molecules may undergo phase shifts as it continues to boil, gaining enough energy to vaporize as it does so.
Is a boiling pot of water undergoing a chemical reaction?Boiling water causes a physical, not a chemical, alteration in the substance.Hydrogen and oxygen do not separate from water molecules.Instead, the links between molecules in water break, enabling them to transition physically from the a liquid to a gas.
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proceeds from notes payable on january 26, nyree co. borrowed cash from conrad bank by issuing a 45-day note with a face amount of $225,000. assume a 360-day year. a. determine the proceeds of the note, assuming the note carries an interest rate of 8%. $fill in the blank 1 b. determine the proceeds of the note, assuming the note is discounted at 8%. $fill in the blank 2
The revenues of the note will equal the $225,000 face value, provided the note has an interest rate of 8%.
The interest rate today is what.On Friday, December 9, 2022, the benchmark 30-year fixed mortgage's average rate is 7.32%, which is a 15 basis point increase from the previous week. If you want to restructure your present mortgage.
The nominal value and face value are both used interchangeably. That which a money is worth. Simply said, it is a security's nominal value. A 45-day note having a face value of $225,000 was issued by Nyree Co. to Conrad Bank based on the information provided. Consequently, the amount of the note's revenues will match its face value, which is 225,000.
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FILL IN THE BLANK the bonds that link the base pairs in the dna double helix are ______ . the bonds that link the base pairs in the dna double helix are _______. ionic bonds ester bonds hydrogen bonds peptide bonds hydrophobic interactions
the bonds that link the base pairs in the dna double helix are peptide bonds hydrophobic interactions ionic bonds ester bonds hydrogen bonds
A hydrogen bond is an electrostatic attraction force between such a hydrogen ion that's also tightly bonded to a more electron - deficient "donor" atom or group and then another electronegative atom with a single pair of electrons—the hydrogen bond electron donor. Hydrogen bonding isn't a sharing of electrons to a hydrogen atom, instead it is a type of dipole-dipole attraction between particles. The force of attraction between a hydrogen atom covalently bonded to a very electronegative including an N, O, or F atom and a very electronegative atom causes it. Because hydrogen has been attached to the a comparatively electronegative, and this electronegative atom is a hydrocarbons donation, the hydrogen bond is the strongest type of link between molecules. As a result, the resulting charge is more powerful.
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What is the molarity of an aqueous solution that has 3.65 × 10-2 mol NaCl in 250.00 mL solution?
According to the molar concentration, the molarity of an aqueous solution is 0.146 M.
What is molar concentration?Molar concentration is defined as a measure by which concentration of chemical substances present in a solution are determined. It is defined in particular reference to solute concentration in a solution . Most commonly used unit for molar concentration is moles/liter.
The molar concentration depends on change in volume of the solution which is mainly due to thermal expansion. Molar concentration is calculated by the formula, molar concentration=mass/ molar mass ×1/volume of solution in liters.
In terms of moles, it's formula is given as molar concentration= number of moles /volume of solution in liters.
Substituting values in above formula, molarity=3.65×10[tex]^-2[/tex]/0.250=0.146 M.
Thus, the molarity of an aqueous solution is 0.146 M.
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What are 5 examples of compound complex sentences?; How do you identify simple compound and complex sentences?; What is complex and compound sentence?; How do I know what type of sentence?
Compound complex sentences : A sentence having two or more coordinate independent clauses and one or more dependent clauses.
Simple compound : A simple sentence consists of just one clause.
What are 5 examples of complex sentences?A clause with one or more dependent clauses and two or more coordinate independent clauses.
Examples of Complex Sentences :
Because he was late again, he would be docked a day's pay. While I am a passionate basketball fan, I prefer football. Although she was considered smart, she failed all her exams. Whenever it rains, I like to wear my blue coat.While playing football, the ball thrown by my friend hit the boy crossing the street.What are 5 examples of simple sentences?A simple sentence just has one clause.
Examples of Simple Sentences :
Joe waited for the train. "Joe" = subject, "waited" = verb.The train was late. "The train" = subject, "was" = verb.Mary and Samantha took the bus. ...I looked for Mary and Samantha at the bus station. ...Mary and Samantha arrived at the bus station early but waited until noon for the bus.Learn more about Compound & simple sentences refer to :
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What mass of potassium chlorate is needed to generate 114.0 L of O2 at 0.720 atm and 291 K?
Answer:
281 g KClO₃
Explanation:
To find the mass of potassium chlorate (KClO₃), you need to
(1) calculate the number of moles O₂ (using the Ideal Gas Law)
(2) create a balanced equation involving KClO₃ and O₂
(3) convert moles O₂ to moles KClO₃ (using mole-to-mole ratio from balanced equation)
(4) convert moles KClO₃ to grams (using the molar mass of KClO₃)
It is important to arrange the ratios/conversions in a way that allows for the cancellation of units. The final answer should have 3 sig figs like the given values.
(Step 1)
To find the amount of moles O₂, you need to use the Ideal Gas Law equation:
PV = nRT
In this equation,
-----> P = pressure (atm)
-----> V = volume (L)
-----> n = number of moles
-----> R = Ideal Gas Constant (0.08206 atm*L/mol*K)
-----> T = temperature (K)
You can plug the given values into the equation and simplify to solve for "n".
P = 0.720 atm R = 0.08206 atm*L/mol*K
V = 114.0 L T = 291 K
n = ? moles
PV = nRT <----- Ideal Gas Law Equation
(0.720 atm)(114.0 L) = n(0.08206 atm*L/mol*K)(291 K) <----- Insert values
82.08 atm*L = n(23.879 atm*L/mol) <----- Simplify both sides (multiply)
3.44 moles = n <----- Divide both sides by 23.879
(Step 2)
Unbalanced Equation: KClO₃ (s) -----> KCl (s) + O₂ (g)
Reactants: 1 potassium, 1 chlorine, 3 oxygen
Products: 1 potassium, 1 chlorine, 2 oxygen
As you can see, the amount of each type of atom is not identical on both sides of the reaction. To balance the equation, you can add coefficients in front of particular molecules/elements to alter the amount of each atom type.
Balanced Equation: 2 KClO₃ (s) -----> 2 KCl (s) + 3 O₂ (g)
Reactants: 2 potassium, 2 chlorine, 6 oxygen
Products: 2 potassium, 2 chlorine, 6 oxygen
(Step 3 + 4)
Atomic Mass (K): 39.098 g/mol
Atomic Mass (Cl): 35.453 g/mol
Atomic Mass (O): 15.999 g/mol
Molar Mass (KClO₃): 39.098 g/mol + 35.453 g/mol + 3(15.999 g/mol) = 122.548 g/mol
3.44 moles O₂ 2 moles KClO₃ 122.548 g
------------------------ x ------------------------- x ----------------------- = 281 g KClO₃
3 moles O₂ 1 mole KClO₃
Classify each of the events according to whether the solubility of the solute increases, decreases, or stays the same. Solute solubility increases Solute solubility decreases Solute solubility stays the same Answer Bank glucose in water heating the mixture CO, in blood: body temperature rises to 103 F KCI in water warming the mixture clectrolytes in solution: a mountain climber ascends 5 km with a sports drink, atmospheric pressure drops 50%
Solubility of gas
Gas solubility increases: O2 in the blood of a person place in hyperbaric chamber. That's the pressure of a gas over a solvent is increased. The partial pressure of an anesthetic gas is increased.Gas solubility decreases: CO2 in a can of opened soda as it warms to room temperature - the temperature is increased.The solubility of a substance is the amount of that substance that is required to form a saturated solution in a given amount of solvent at a specified temperature. Solubility is often measured in grams of solute per 100g of solvent. The solubility of sodium chloride in water is 36.0g per 100g of water at 20oC. The temperature must be specified because solubility varies with temperature.The solubility of a solid or a liquid solute in a solvent is affected by the temperature, while the solubility of a gaseous solute is affected by both the temperature and the pressure of the gas. We will examine the effects of temperature and pressure separately.
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select all the compounds from the following list that would give rise to two signals in the 1h nmr spectrum with an integration ratio of 2:3.
With an integrating ratio of 2:3, CH3CH2Br and CH3CH2CH2CH3 would produce two flashes inside the 1h nmr spectrum.
Why are Spectrum's costs so expensive?In a statement, Spectrum said, "Every year, TV producers increase the price associated with carrying their content, resulting in greater costs for the overall sector. We're passing along these higher prices to viewers as a clear result of the increasing expense of content from TV networks i broadcast."
Verizon or Spectrum, whose cost is less?Spectrum vs. Verizon in terms of plans and cost. When comparing the 300 Mbps options, Verizon is less expensive than Spectrum. Their gigabit rates are identically priced, but all 3 Spectrum Internet® plans see price rises after a year, unlike Verizon, whose plans do not.
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A student added 3 g of melted wax to a container that weighed 15 g. What is the weight of the container after the wax hardens?
The weight of the container after the wax hardens is 0.18 N.
What is the law of conservation of mass?We know that according to the law of the conservation of mass, the mass of an object can neither be created nor destroyed but it can be changed from one form to the other.
Looking at this law, we know that the mass would not change even after the time that the wax must have hardened. The total mass of the wax would have to be a constant.
Total mass would now be;
Mass of the wax + mass of the container
= 3 g + 15 g
= 18 g
Weight = 18/1000 * 9.8 m/s^2
= 0.18 N
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This term is used to describe the molecules that are being studied in a thermodynamic reaction.
-System
-Surrounding
-Container
-Vessel
The term used to describe the molecules that are being studied in a thermodynamic reaction is system.
Thermodynamics refers to the study of the relations between heat, work, temperature, and energy. The laws of thermodynamics define the way energy in a system change and whether the system can perform useful work on its surroundings. Thermodynamic reaction or control is a reaction in which the product ratio is determined by the relative stability of the products. Thermodynamic stability occurs when a system is in its lowest energy state, or in chemical equilibrium with its environment. Hence, thermodynamic studies study molecules within a system.
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Which compound would have the most exothermic lattice energy?
A. NaF
B. NaBr
C. NaI
D. All have the same lattice energy.
E. NaCl
The compound that would have the most exothermic lattice energy is NaF. Option A.
Lattice energy is exothermic. Lattice energy is the energy released when gaseous cations and anions associate with each other to form a solid crystalline ionic solid. When paraffin burns in a flame, it reacts with oxygen to produce carbon dioxide and water.
This reaction is indeed exothermic as it releases heat into the atmosphere with the help of other products. The amount of heat released depends on the chemical reaction between hydrocarbons and oxygen. A reaction is exothermic if the sum of the enthalpies of the reactants is greater than the enthalpy of the products. If the enthalpy on the product side is large, the reaction is endothermic.
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rank the speed of sound through the following from greatest to least: a. helium b. benzene c. mercury
The the density of the substance that sound travels through directly affects its speed. Helium and benzene are the two liquids of a three media mentioned. Mercury is a metal, but it is also liquid.
What is density, for instance?How much "stuff" is contained in a specific quantity of space is determined by its density. For instance, a block of the harder, lighter element gold (Au) will be denser than a block of heavier element lead (Pb) (Au). Styrofoam blocks are less dense than bricks. Mass per cent volume serves as its definition.
What are density's two characteristics?The two physical characteristics of matter—mass and volume—are necessary for the classification of something as matter. The mass to volume ratio of a substance or item is known as its density. Mass per volume unit or weight divided by volume are two other ways to describe density.
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for the follwing pair of polymers,do the following:(1)state whether it is possible to decide if one polymer has a higher tensile modulus than the other;(2)if this is possible,note which has the higher tensile modulus and then cite the reason(s) for your choice;and (3) if it is not possible to decide,then state why not.
-syndiotactic polystyrene having a number-average molecular weight of 400,000g/mol
-isotactic polystyrene having a number-average molecular weight of 650,000g/mol
8.8 for the follwing pair of polymers,do the following:(1)state whether it is possible to decide if one polymer has a higher tensile modulus than the other;(2)if this is possible,note which has the higher tensile modulus and then cite the reason(s) for your choice;and (3) if it is not possible to decide,then state why not.
-syndiotactic polystyrene having a number-average molecular weight of 600,000g/mol
-isotactic polystyrene having a number-average molecular weight of 500,000g/mol
Yes, it is possible.
The tensile modulus of the linear and isotactic poly(vinyl chloride) will be higher. Compared to branched polymers, linear polymers are more prone to crystallize.
What is the mechanical properties of polymers?
The moduli of elasticity and other classes of strength measures, such as the yield and tensile strengths, can be used to characterize the mechanical properties of polymers in a manner that is quite similar to that of metals or other common crystalline materials. The most significant mechanical and elastic characteristics of polymeric materials are summarized generally below:
Strength: Whenever the applied force is greater than a straightforward linear elastic deformation, represents the stress force required to fracture the material sample under investigation. Tensile strength (stretching of the polymer), compressional strength (compressing the polymer), flexural strength (bending of the polymer), torsional strength (twisting of the polymer), and impact strength are some of the most important types of strength quantities used in typical materials characterization measurements (e.g. under the effects of direct hammering).Percent Elongation to Break (Ultimate Elongation): This statistic, expressed as a percentage change in the material's length, describes the maximum strain that the polymer sample can experience before it ultimately breaks (at the aforementioned strength point).Young's Modulus: A measure of a material's total stiffness, it is the ratio of stress to strain in the region of its linearly elastic response.To know more about Mechanical properties of polymers, visit:
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Write down an 2 examples of a single displacement reaction.
Explain the importance or uses of these chemical reactions in everyday activities of people. (PROVIDE MORE THAN ONCE SENTENCE)
Example:
Single replacement- 2K + 2H2O → 2KOH + H2
Potassium hydroxide is used in making soap, as an electrolyte in alkaline batteries and in electroplating, lithography, and paint and varnish removers. Medically, potassium hydroxide (KOH) is widely used in the wet mount preparation of various clinical specimens for microscopic visualization of fungi and fungal elements in skin, hair, nails, and even vaginal secretions
Example:
Single displacement- Zn + CuSO4 → ZnSO4 + Cu
This reaction is commonly used in the purification of copper, as the zinc ions in the reaction are less reactive than copper and will not dissolve in the sulfuric acid solution. The resulting copper can be easily separated from the zinc sulfate solution by electrolysis.
Single displacement- Al + CuCl2 → AlCl3 + Cu
This reaction is used in the production of aluminum chloride, which is a common starting material for the synthesis of a variety of compounds used in pharmaceuticals, fragrances, and other industrial applications. The aluminum chloride produced in this reaction can also be used as a catalyst in the production of polymers and in the refining of petroleum products.
Why did the periodic table change over time?; What are the most recent changes discoveries to the periodic table of elements?; Which is the most likely reason scientists update the periodic table?; When was the periodic table last updated and what elements were added?
To explain the behavior of chemicals, new findings and ideas are always being created. They are Nihonium, Moscovium, and Tennessine, respectively. Researchers find new elements.
An explanation of an element.An important part of the entire. In chemistry, the term refers to a straightforward chemical that cannot be broken down into smaller parts or changed into another substance. The fundamental units of an element are its atoms, which are composed of protons, neutrons, and electrons. Each atom of a given element contains a set number of protons.
What exactly does the word "elements" mean?If a substance has exactly the same number of protons in each of its atoms, or, to put it another way, if all of its atoms, then that substance is said to be an element.
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What is the formula for lead II carbonate compound?; What is the formula for the ionic compound formed between Pb2+ and S2?; What is the name for PbCO3 2?; What is the formula for the compound formed from Fe2+ and O2 -?
The formula for the lead II carbonate compound is PbCO₃.
The formula for the ionic compound formed between Pb⁺² and S⁻² is PbS.
The name for Pb(CO₃)₂ is lead (IV) carbonate.
The formula for the compound formed from Fe⁺² and O⁻² is FeO.
Ionic compounds are compounds formed from ionic bonds between the metal that has positive ions and the non-metal that has negative ions. All ions in the compound use electrons together to achieve stability.
Pb⁺² with CO₃⁻²
Positive ion Pb⁺² = lead (II) will release two electronsNegative ion CO₃⁻² = carbonate will gain two electronsPbCO₃ = lead (II) carbonatePb⁺² and S⁻²
Positive ion Pb⁺² = lead (II) will release two electronsNegative ion S⁻² = sulfide will gain two electronsPbS = lead (II) sulfidePb⁺⁴ and CO₃⁻²
Positive ion Pb⁺⁴ = lead (IV) will release four electronsNegative ion CO₃⁻² = carbonate will gain two electronsNeed two ions CO₃⁻²Pb(CO₃)₂ = lead (IV) carbonateFe⁺² and O⁻²
Positive ion Fe⁺² = iron (II) will release two electronsNegative ion O⁻² = oxide will gain two electronsFeO = iron (II) oxideLearn more about the ionic compounds here: https://brainly.com/question/977324
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H(g) + C2(g) + HCl(9) The formation of HCl(9) from its atoms is represented by the equation above. Which of the following best explains why the reaction is thermodynamically favored? A AG > because energy is released as the bond between the H and Cl atoms forms, and entropy increases because the number of gaseous product particles is less than the number of gaseous reactant particles. B AG > Obecause energy is absorbed as the bond between the H and Cl atoms forms, and entropy decreases because the number of gaseous product particles is less than the number of gaseous reactant particles. AG < 0 because although energy is absorbed as the bond between the H and Cl atoms forms, entropy increases because the number of gaseous product particles is less than the number of gaseous reactant particles. D AG<0 because although entropy decreases because the number of gaseous product particles is less than the number of gaseous reactant particles, energy is released as the bond between the H and Cl atoms forms.
(WHY: Despite entropy decreasing rather than increasing as the reaction progresses (S0), the energy released (H0) as the bonds between the H and Cl atoms form is sufficient to make the process thermodynamically favorable (G0).
What does the term "thermodynamics" imply literally?In order to define the study of heat flow, the term "thermodynamics" was originally coined in 1849. The terms "therme," which means "heat," and "dynamis," which means "power," are two separate Greek words that are its roots. The study of heat as a source of energy or work is what thermodynamics, taken literally, is.
Describe an example of thermodynamics.A car's engine is a thermodynamic system that burns fuel within the cylinder; its environment is made up of the radiator, piston, exhaust system, and ambient air.
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Which is the balanced equation for V2O5 + CaS → CaO + V2S5?
V2O5 + CaS → CaO + V2S5
5V2O5 + 5CaS → 10CaO + 5V2S5
3V2O5 + 3CaS → 3CaO + 3V2S5
V2O5 + 5CaS → 5CaO + V2S
To calculate the atoms of an element in a given molecule, we need to multiply stoichiometry by the number that is written on the foot of that element. Therefore, the correct option is option D.
What is Balanced equation?Balanced equation is the one in which the total number of atoms of a species on reactant side is equal to the total number of atoms on product side. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, displacement reaction.
The other characteristic of balanced reaction is that physical state should be written with each compound or molecule on reactant and product side. Physical state should be written in brackets. s means solid, l means liquid, g means gas.
The balanced equation for V[tex]_2[/tex]O[tex]_5[/tex] + CaS → CaO + V[tex]_2[/tex]S[tex]_5[/tex] is
V[tex]_2[/tex]O[tex]_5[/tex] + 5CaS → 5CaO + V[tex]_2[/tex]S[tex]_5[/tex]
Therefore, the correct option is option D.
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which of the following statements about the previous part is correct? which of the following statements about the previous part is correct? the light excites an electron from a bonding orbital to an antibonding orbital. the light excites an electron from an antibonding orbital to a bonding orbital. in the excited state there are more bonding electrons than antibonding electrons
The bond order for both H2+ and H2− is the same but H2+ is more stable than H2− due to the absence of electrons in the anti-bonding orbital.
Electrons that spend most of their time between the nuclei of two atoms are placed into the bonding orbitals, and electrons that spend most of their time outside the nuclei of two atoms are placed into antibonding orbitals.
In chemical bonding theory, an antibonding orbital is a type of molecular orbital that weakens the chemical bond between two atoms and helps to raise the energy of the molecule relative to the separated atoms. Such an orbital has one or more nodes in the bonding region between the nuclei.
Furthermore, the bonding electron is the electrons that stick together and fall in the lowest state. While anti-bonding electron is unbounded or free electrons that move to the higher orbital state.
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