There are three chirality centers in the structure: The carbon atom at the center of the molecule, the nitrogen atom at the top of the molecule, the oxygen atom at the bottom of the molecule.
What is structure?
Structure is the arrangement of components within a system. It is used to define the layout, connections and interactions of those components, in order to achieve a certain purpose. Structures can be physical, such as the structure of a bridge, or abstract, such as the structure of a story. Structures can be simple or complex and can involve multiple levels of inter-related components. For example, a business may have a hierarchical organizational structure with a CEO at the top, followed by a board of directors and then various departments and teams. Structure is an important part of any system because it helps to create order and organization, and provides clarity and understanding.
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Calcium perbromate, Ca(BrO4)2 (m.w.= 327.9 g/mol) decomposes upon heating to release oxygen gas according to the equation below. A sample containing Ca(BrO4)2 is heated and the gas produced collected by downward displacement of water at 50.0°C. The total volume of gas collected was 438.0 ml at an atmospheric pressure of 680 torr. The vapor pressure of water at 50.0°C is 92.5 torr.
Ca(BrO4)2 (s) \rightarrow CaBr2 (s) + 4 O2 (g)
a.) Calculate the number of grams of Ca(BrO4)2 in the original sample. b.) calculate the mole fraction of oxygen in the collected gas mixture
The number of grams of Ca(BrO4)2 in the original sample is 1.19 g. the mole fraction of oxygen in the collected gas mixture is 1.
What is calcium perbromate?Calcium perbromate (Ca(BrO4)2) is a chemical compound composed of calcium, bromine and oxygen. It is a white crystalline solid that is highly water-soluble. It is used in the production of bromine compounds and as an oxidizing agent in organic synthesis.
a) To calculate the number of grams of Ca(BrO4)2 in the original sample, we can use the Ideal Gas Law:
PV = nRT
where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature in Kelvin.
By rearranging the equation and assuming that the number of moles of gas is equal to the number of moles of oxygen gas produced by the decomposition, we can calculate the number of moles of oxygen produced.
n = (PV) / (RT)
n = (680 torr x 438.0 ml) / (0.08206 Latm/molK x 323.15 K)
n = 0.0144 moles
Given the equation of the reaction:
Ca(BrO4)2 (s) -> CaBr2 (s) + 4 O2 (g)
we can calculate the number of moles of Ca(BrO4)2:
n(Ca(BrO4)2) = n(O2) / 4
n(Ca(BrO4)2) = 0.0144 moles / 4 = 0.0036 moles
And then the number of grams of Ca(BrO4)2 in the original sample:
mass = n x molar mass
mass = 0.0036 moles x 327.9 g/mol = 1.19 g
b) To calculate the mole fraction of oxygen in the collected gas mixture, we first need to calculate the number of moles of oxygen produced by the reaction:
n(O2) = 0.0144 moles
then we can calculate the total number of moles of gas present in the collected mixture by using the Ideal gas law PV = nRT and assuming that the gas behaves as an ideal gas:
nT = (PV) / RT
nT = (680 torr x 438.0 ml) / (0.08206 Latm/molK x 323.15 K)
nT = 0.0144 moles
then we can calculate the mole fraction of oxygen in the collected gas mixture:
X(O2) = n(O2) / nT
X(O2) = 0.0144 moles / 0.0144 moles = 1
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Aubree's car used 4 gallons to travel 120 miles. How many miles can the car go on one gallon of gas?.
The car can go 30 miles on one gallon of gas.
Distance is the sum of an object's movements, regardless of direction. Distance can be defined as the amount of space an object has covered, regardless of its starting or ending position.
Vehicles running on compressed natural gas (CNG) operate similarly to those driven by gasoline and equipped with spark-ignited internal combustion engines. The engine operates similarly to a gasoline engine. In a fuel tank, or cylinder, usually at the back of the car, natural gas is kept.
Gallons of gas used by car = 4
distance covered by car = 120 miles
the distance which can be covered by Aubree's car on one gallon of gas =120/4 = 30 miles
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explain why wateris polar its molecular geometry is bent. the hydrogen atom attracts electrons much more strongly than the oxygen atom. the oxygen and hydrogen atoms have the same electronegativity. the oxygen atom has a greater attraction for electrons than the hydrogen atom does. water dipole moment is equal to zero. the electrons of the covalent bond are not shared equally between the hydrogen and oxygen atoms.
Due to the bent structure of the molecule, water (H2O) is polar. Due to the shape, the majority of the hydrogen atoms' positive charge is on one side of the molecule while the negative charge from the oxygen atoms is on the other. Polar covalent chemical bonding is demonstrated here.
A substance or object undergoes a physical change when it is utilised in a combination, changes phases, or changes appearance. More crucially, a physical alteration does not affect a substance's molecular makeup. The following three are examples of physical changes in water that exclusively affect their respective phases:
When liquid water freezes, it solidifies.
Boiling water transforms liquid into gas
When liquid water evaporates, it turns into gaseous water.
On the other hand, a chemical change occurs when the molecules that made up the original substance are split up and then put back together in new combinations that are distinct from the original combinations. When water is electrolyzed, oxygen and hydrogen molecules are created as a result of the process.\
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The water is the polar compound and its geometry is bent because the oxygen atom has a greater attraction for electrons than the hydrogen atom does.
Water is the polar compound and its geometry is bent and not the linear due to the electronegativity difference in between the oxygen atom and the hydrogen atom. the electronegativity of the hydrogen is the 2.1 and the electronegativity of the oxygen is the 3.5. if the electronegativity difference is less than compound more likely form the covalent bond and when it is high the atoms form the ionic bond.
Thus, in the case of the water molecule , the oxygen and hydrogen is the non metal and the oxygen is more electronegative than the hydrogen atom so they form covalent bond but it is polar molecule.
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aluminum metal reacts with aqueous copper(ii) sulfate to form aqueous aluminum sulfate and copper metal. what is the stoichiometric coefficient for aluminum when the chemical equation is balanced using the lowest whole-number stoichiometric coefficients?
Answer:
The stoichiometric coefficient for aluminum, Al when the chemical equation is balanced is 2.
To obtain the stoichiometric coefficient for aluminum, we shall write and balance the equation for the reaction. This is illustrated below:
Aluminum => Al
Iron (II) chloride => FeCl₂
Aluminum chloride => AlCl₃
Iron => Fe
Aluminum + Iron (II) chloride —> Aluminum chloride + Iron
Al + FeCl₂ –> AlCl₃ + Fe
There are 3 atoms of Cl on the right side and 2 atoms on the left side. It can be balance by writing 3 before FeCl₂ and 2 before AlCl₃ as shown below:
Al + 3FeCl₂ –> 2AlCl₃ + Fe
There are 2 atoms of Al on the right side and 1 atom on the left. It can be balance by writing 2 before Al as shown below:
2Al + 3FeCl₂ –> 2AlCl₃ + Fe
There are 3 atoms of Fe on the left side and 1 atom on the right side. It can be balance by writing 3 before Fe as shown below:
2Al + 3FeCl₂ –> 2AlCl₃ + 3Fe
Now, the equation is balanced.
The coefficient of Aluminum, Al in the balanced equation is 2.
in an equilibrium mixture the partial pressure of s02 and o2 are .135atm and .455 atm, respetively, what is the equilibrim partial pressure of s03 in the mixture>
In an equilibrium mixture the partial pressure of s02 and o2 are .135atm and .455 atm, respectively, 0.135atm is equilibrium partial pressure of SO₃ in mixture.
2SO₂(g) + O₂(g) ⇔ 2SO₃(g)
[tex]K_{p} = \frac{P_{SO_{3} } }{P_{SO_{2} P_{O_{2} } } } = \frac{1}{P_{O_{2} } }[/tex]
Partial pressure of So₃ and SO₂ is same at equilibrium because moles of SO₂ and SO₃ are same at equilibrium.
When the partial pressure of any of the gaseous reactants or of the products is increased, the position of equilibrium is shifted so as to decrease its partial pressure. This is usually achieved by favoring the reaction in which there is decrease in the number of moles of gaseous components.
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Which statement best identifies which of these models represents a gas?
Because its particles move faster as swiftly and are spaced more apart, Diagram B represents a gas.
What is gas ?One of the four basic states of matter, along with solid, liquid, and plasma, is gas. Individual atoms, elemental molecules derived from a single type of atom, or complex molecules derived from a number of atoms can all be found in a pure gas. A variety of pure gases can be found in a gas mixture like air.
By evaluating the four major gases you're searching for—oxygen (O2), carbon monoxide (CO), hydrogen sulphide (H2S), and methane (CH4)—a 4 gas monitor can help you protect your employees in any setting.
Thus, Diagram B is a gas, because its particles move more quickly and are farther apart.
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Your question is incomplete, probably your question was
Which statement best identifies which of these models represents a gas? Model A is tightly packed, and Model B is spaced out and far apart.
5. Which combination will produce a precipitate? a) NH4OH(aq) and HCl(aq) b) AgNO3(aq) and CaCl2(aq) c) NaOH(aq) and HCl(aq) d) NaCl(aq) and H2SO4(aq) Ans: 6. Based on the solubility rules, will there be a solid formed when solutions of CuSO4(aq) and BaCl2(aq) are mixed? If so, what solid? CuSO4 + BaCl2 → CuCl2 + BaSO4 (A) No solid forms (B) Yes, a solid forms, BaSO4(s) (C) Yes, a solid forms, CuCl(s) (D) Two solids form, CuCl2(s) and BaSO4(s) Ans: . W 3. HF 4. HBr II UI the following are strong acids? 1. HI 2. HNO & 3 & 4 b) 1, 2, 3, & 4 1, 3, & 4 d) 2, 3, & 4 e) 1, 2, & 4 Ans: 8. Give the net ionic equation for the reaction (if any) that occurs when aqueous solutions of H SO, and KOH are mixed. A) H+(aq) + OH-(aq) → H20(0) B) 2 K+(aq) + SO42-(aq) → K2SO4(s) C) H+(aq) + OH-(aq) + 2 K+(aq) + SO42-(aq) → H20(1) + K2SO4(s) D) H22+(aq) + OH-(aq) → H2(OH)2(0) E) No reaction occurs.
This is an acid-base neutralization reaction.The acid is H+(aq), and the base is OH-(aq).
Explain why the reaction between H SO and KOH produces a precipitate?C) H+(aq) + OH-(aq) + 2 K+(aq) + SO42-(aq) → H20(1) + K2SO4(s).When H2SO4 and KOH are mixed, a precipitation reaction occurs due to the formation of a soluble product (K2SO4), which is insoluble in water.The reaction between H2SO4 and KOH is also an acid-base neutralization reaction. When an acid and a base react, they neutralize each other to form a salt, which is usually insoluble in water.The salt formed in this reaction is K2SO4, which is insoluble in water, so it will precipitate out of solution. This is why the reaction between H2SO4 and KOH produces a precipitate.When aqueous solutions of H2SO4 and KOH are mixed, they undergo a precipitation reaction. The net ionic equation for this reaction is H+(aq) + OH-(aq) + 2 K+(aq) + SO42-(aq) → H2O(l) + K2SO4(s).This reaction occurs because the hydronium ions (H+) from the H2SO4 reacts with the hydroxide ions (OH-) from the KOH to form water (H2O(l)) while the potassium ions (K+) and sulfate ions (SO42-) form the precipitate K2SO4(s).The reaction is an acid-base reaction because the H2SO4 is an acid and the KOH is a base. The resulting product of the reaction is a solid, K2SO4, that is insoluble in water, thus it precipitates out of solution.To learn more about acid-base neutralization reaction refer to:
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Preview File Edit View Go Tools Window Help 68%CI, Thu 1:57 PM a :E diels alder anthracene and maleic anhydride.pdf (page 4 of 10) When anthracene's center ring reacts as a diene, the product has two fully aromatic rings, each with six pi electrons, as shown in Equation 3. (Eq. 3) maleic anhydride (dienophile) anthracene adduct) (diene) The reaction is carried out in xylene, which is actually a mixture of the three dimethylbenzenes, for three reasons. First, the 140 °C boiling point provides a good reaction temperature. Second, the xylene mixture does not freeze when it is cooled in ice water. Third, the reactants are more soluble in xylene than is the product, which crystallizes. The product is a relatively stable anhydride. Although anhydrides re- act with water in air, this one reacts slowly and is easily isolated and char- acterized before much hydrolysis occurs to name the product, but 9,10-dihydroanthracene-9,10- ,?-succinic anhy- dride is probably the simplest. . There are several possible ways
Diels-Alder (DA) reaction is incredibly valuable method for the synthesis of 6-rings,It is not within the remit of this course to go into detail about this reaction.
• We are interested in the stereochemical outcome but need a bit of revision.
• Normally DA is highly regioselective
toluene, 120°C, no catalyst 59 benzene, 25°C, SnCl4 96
Lewis acid improves selectivity
• It is controlled by the ‘relative sizes’ of the p orbitals in the LUMO & HOMO involved
• More accurately referred to as the orbital coefficients
• In the presence of a Lewis acid dienophile is polarised giving higher regioselectivity and a faster reaction NMe2 + regioselectivity often follows simple electronic argument (consider which C is δ+ve or δ–ve)
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I have a solid with two different melting points. What can you tell about the solid?
The melting point differ with respect to the bond type and structure of the solid. If a solid have two different melting points, then it must acquiring tow different structures that can be interchangeable.
What is melting point?Melting point of a substance is the temperature at which its solid state changes to liquid state where the two states are in equilibrium. The melting point of a substance depends on the bond type, molar mass, temperature and pressure.
The more strong the bond is, greater will be the melting point. Melting point is a characteristic property of a compound and we can determine the purity using melting point.
If a solid exhibits two melting points, then it might having two different structures and bond types. The structure can be changed through resonance, tautomerism etc. and it can have tow melting points.
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Match the following definitions to the most appropriate term: a substance that donates one proton when dissolved in water [ Choose] a substance that donates two protons when dissolved in water [ Choose ]
a substance that donates three protons when dissolved in water any ionic compound whose cation comes from a base and whose anion comes from an acid [Choose] the solution in the buret [ Choose] the solution in the flask [Choose]
Monoprotic and diprotic substances are those that donate one proton and two protons, respectively, when dissolved in water.
Any acid that contains two hydrogen atoms and can release or ionise in water, such as carbonic acid and sulphuric acid.Diprotic acids have two acidic hydrogen atoms and include sulfuric acid (H2SO4), carbonic acid (H2CO3), hydrogen sulphide (H2S), chromic acid (H2CrO4), and oxalic acid (H2C2O4).
One hydrogen atom or proton can be given away by monoprotic acids to their aqueous solution.Since mono means "one," a monoprotic acid is an acid that will only donate one proton. One hydrogen ion or multiple hydrogen ions may exist in a monoprotic acid. However, only one will be given as a response.
Monoprotic acids include benzoic acid (C6H5CO2H), acetic acid (CH3CO2H or HOAc), nitric acid (HNO3), and hydrochloric acid (HCl).
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The tendency of molecules of the same kind to stick together is called ______. ______ is stronger for _____ then most other liquids
Cohesion is the tendency for molecules of the same kind to stick together. The cohesion of water is stronger than that of most other liquids.
Water molecules have strong cohesive forces as a result of their capacity to form hydrogen bonds with one another. The scientific term cohesion describes the attraction between molecules of the same type. The interactions of water molecules can be described by two characteristics, cohesion and adhesion. As well as the interactions between water molecules and other things, such as leaves or even yourself. Water likes to stick to itself, which is referred to as cohesion, while adhesion refers to water's affinity for sticking to other objects.
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Drag each number to the correct location on the equation. Each number can be used more than once, but not all numbers will be used.Balance the equation with the correct coefficients.
A chemical equation is said to be balanced when there are an equal number of atoms on both the reactant and product sides.
[tex]KCl3 = KCL + O2[/tex]
In this case-
Therefore, we multiply by 2 on the reactant side and by 2 and 3 on the product side of the equation to make it equal. Equal numbers and types of each atom are present on both sides of balanced chemical equations. A balanced equation must have coefficients that are the easiest whole number ratio. Chemical reactions always preserve mass.
These are the atom counts on the reactant side.
K = 1
Cl = 1
O = 3
These are the atom counts on the product side.
K = 1
Cl = 1
O = 2
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What is the correct answer with the correct significant figures for 4.10 cm x 3 cm?
Answer:
10
Explanation:
4.10*3=12.3
in sig figs it will be the number with the least amount of sig figs
aka 3 (1 sig fig)
12.3 rounds to 10 which has 1 sigfig
what ppe should you use when working with a hazardous chemical that poses a risk of a splash hazard but not an inhalation hazard? (select all that apply)
Splash aprons protect your body against corrosive chemicals.
Still, similar as pouring the contents of one vessel into another, splash aprons are demanded, If you're handling a sharp material in such a way as to present a significant splash hazard.
PPE includes overalls, aprons, footwear, gloves, chemical resistant spectacles, face securities and respirators. For some high- threat conditioning, similar as spray oil, abrasive firing and some exigency response conduct, PPE should always be used to condense advanced position control measures.
The stylish control for limiting exposure to chemical vapor in the lab is a duly operating chemical cloud hood or glove box. Point exhausts (e.g., exhaust snorkels) may be effective controls for some chemical vapors, but a threat assessment must be done to determine whether a point exhaust will be sufficient.
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What are the two main components of the peripheral nervous system?
A.
the sympathetic nervous system and spinal cord
B.
the sensory and motor neurons
C.
the brain and spinal cord
D.
the parasympathetic nervous system and senses
Answer: i believe it would be A
Answer:
a and d
Explanation:
how many protons and how many neutrons are in (a) 3he, (b) 20ne, (c) 60co?
3He has 2 protons and 1 neutron, 20Ne has 10 protons and 10 neutrons, and 60Co has 27 protons and 33 neutrons.
(a) 3He has 2 protons and 1 neutron.
(b) 20Ne has 10 protons and 10 neutrons.
(c) 60Co has 27 protons and 33 neutrons.
(a) 3He is a helium atom, which has an atomic number of 2. This means that it has 2 protons in its nucleus. The mass number of 3He is 3, which means that it has 1 neutron in its nucleus. Therefore, 3He has 2 protons and 1 neutron.
(b) 20Ne is a neon atom, which has an atomic number of 10. This means that it has 10 protons in its nucleus. The mass number of 20Ne is 20, which means that it has 10 neutrons in its nucleus. Therefore, 20Ne has 10 protons and 10 neutrons.
(c) 60Co is a cobalt atom, which has an atomic number of 27. This means that it has 27 protons in its nucleus. The mass number of 60Co is 60, which means that it has 33 neutrons in its nucleus. Therefore, 60Co has 27 protons and 33 neutrons.
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A change in momentum from applying a force for a certain time is:
A change in momentum from applying a force for a certain time is called an impulse.
What is in physics the word momentum?In physics, the word momentum can be defined as a type of measurement that indicates mass motion, which is generally denoted by the letter p and can be used to understand the impulse properties of a given compound and or material.
Therefore, with this data, we can see that in physics the word momentum is used to understand the motion of the mass and thus determine the kinetic properties of an element.
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1. The structures of four complex ions (W,X,Y, and Z) are shown below:
determine which, if any, of these complex ions are (i) geometric isomers, (ii) optical isomers, (iii) identical, or (iv) not related to any of the others as an isomer.
2. Draw the structures of the four geometrical isomers of [Co(NH3)2(en)BrCl]^+. Two of these are optically active. Identify these, and draw the structures of their optical isomers.
(1.i) W and Y are geometric isomers, (1.ii) X and Z are optical isomers, (1.iii) X and Z are identical, (1.iv) W, X, Y, Z are not related to any of the others as an isomer. (2) Structures of optical isomers are shown below.
(1) W, X, Y, and Z are complex ions, which are composed of a central metal ion (Co2+) coordinated to a number of ligands (NH3, en, Br, Cl).
i) Geometric isomers are different compounds that have the same atoms in the same order but differ in the arrangement of those atoms in space.
W and Y are geometric isomers because they have the same atoms in the same order, but their ligands are arranged differently around the central metal ion.
ii) Optical isomers are compounds that are non-superimposable mirror images of each other. Enantiomers are another name for these isomers.
W and Y are not optical isomers because they are not non-superimposable mirror images of each other.
iii) Identical. X and Z are identical because they have the same atoms in the same order and arrangement.
iv)An isomer that is unrelated to the others. W and X, Y and Z are not related to each other as isomers because they have different atoms and different arrangements.
(2) The four geometric isomers of [Co(NH3)2(en)BrCl]^+ are:
cis-[Co(NH3)2(en)BrCl]^+
trans-[Co(NH3)2(en)BrCl]^+
cis-[Co(NH3)2(en)ClBr]^+
trans-[Co(NH3)2(en)ClBr]^+
The cis isomers are optically active, and the trans isomers are not. The cis isomers have a different arrangement of ligands around the central metal ion, whereas the trans isomers have the same arrangement of ligands.
The optical isomers of cis-[Co(NH3)2(en)BrCl]^+ are:
(R)-cis-[Co(NH3)2(en)BrCl]^+
(S)-cis-[Co(NH3)2(en)BrCl]^+
The optical isomers of cis-[Co(NH3)2(en)ClBr]^+ are:
(R)-cis-[Co(NH3)2(en)ClBr]^+
(S)-cis-[Co(NH3)2(en)ClBr]^+
The structures of the optical isomers would be the same as their corresponding geometric isomers, but with a different chirality (R or S).
It is important to note that the structures of the complex ions and the isomers are difficult to draw with text, and it is best to consult a chemical structure drawing program or a textbook for a more detailed and accurate representation.
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Predict the products for the single replacement reactions given. check to see that the equations are balanced. ca mgcl2 → ? cacl2 mg ca cl2 mg cl2 cacl mg
When a less active ingredient in a molecule can be changed with a more reactive element, we forecast that just one reaction will take place. Ca + MgCl₂ → CaCl₂ + Mg will be the chemical equation for a fair system.
What are equations in science?An illustration of a chemical that is often expressed as a linear array with an arrow or a group of arrows separating the symbols and amounts of the reactants and those of the products.
The given equation is Ca + MgCl₂ →
It is well known that when calcium (Ca) reacts with magnesium chloride (MgCl₂), calcium chloride (CaCl₂) and magnesium are produced.
Ca + MgCl₂ → CaCl₂ + Mg.
Calcium only has atom on the photocatalyst surface and one on the product side, as can be seen. Chlorine, from the other hand, has one atom on both the reactant and product sides.
As a result, the response will be balanced.
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Draw the Lewis dot structure for Al.
The Lewis dot structure for Al (Aluminium) is attached.
Aluminum is located in Group IIIA of the periodic table, and as a result, it possesses three valence electrons. Al is the symbol that is used to represent it. One atom of aluminium has a total of 13 electrons within it. There are eight electrons in the second orbit, three electrons in the third orbit, and two electrons in the first orbit. As a result, the Lewis structure of it consists of three dots surrounding it. Al is the symbol that is used to represent it. The Lewis dot structure for Al (Aluminium) is attached.
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If the free energy change ΔG for a reaction is -46.11 kJ/mol, the reaction is:
A. at equilibrium.
B. endergonic.
C. endothermic.
D. exergonic.
E. exothermic.
The reaction is exergonic reaction if the free energy change ΔG for a reaction is -46.11 kJ/mol.
Exergonic reactions are those that release energy in the form of heat or light, and have a negative ΔG. In other words, the products have less free energy than the reactants, and the reaction proceeds spontaneously. The ΔG is a measure of the thermodynamic feasibility of a reaction, and a negative ΔG indicates that the reaction is energetically favorable, and it will release energy and proceed spontaneously.In chemistry, the symbol ΔG stands for the change in Gibbs free energy, which is a measure of the feasibility of a chemical reaction. The Gibbs free energy is a thermodynamic state function that combines the energy of a system (enthalpy, H) with the entropy (S) of a system and the temperature (T) in which the reaction occurs. It is represented by the equation ΔG = ΔH - TΔS.
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In nature, most double bonds of fatty acids are in the _________ formation, but after hydrogenation many have been converted to _________ formation.
In nature, most double bonds of fatty acids are in the cis formation, but after hydrogenation many have been converted to trans formation.
Yes, that is correct. The cis formation of double bonds in fatty acids is more common in nature due to the geometric arrangement of the atoms, as it allows for the most efficient packing of atoms.
However, when hydrogen is added to the double bond, the geometric arrangement of the atoms changes, converting the cis formation to a trans formation. This process is known as hydrogenation, and it is used to increase the stability and shelf life of fatty acid compounds.
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What is the total reduction potential of a cell in which potassium (K) is reduced and copper (Cu) is oxidized
The total reduction potential is -3.26 V. This means that the cell has a negative voltage, which indicates that the reaction is spontaneous and releases energy. The energy released is available to do work such as charge a battery or power a device.
The total reduction potential of a cell in which potassium (K) is reduced and copper (Cu) is oxidized can be calculated by combining the individual reduction potentials of the two half-reactions. The reduction potential of the potassium ion (K+) to potassium metal (K) is -2.92 volts, and the oxidation potential of copper (Cu) to copper ions (Cu2+) is +0.34 volts. To calculate the total reduction potential of the cell, we subtract the oxidation potential of the Cu2+ from the reduction potential of the K+:
Ecell = Ereduction (K+) - Eoxidation (Cu2+)
Ecell = -2.92 V - (+0.34 V) = -3.26 V
This means that the total reduction potential of the cell is -3.26 V, which is a measure of the energy available from the reaction to do work such as charge a battery or power a device. The voltage of this redox reaction is negative, meaning that the reaction is spontaneous, and it releases energy as heat, light, and chemical energy.
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Please Help Quick ASAP Hurry Chemistry Unit 4 Review Sheet
3. Refer to the equation below of the reaction of Nitrogen with hydrogen. If 16.7 grams of Nitrogen react, then:
N2(g) + 3H2(g) → 2NH3(g)
a. How many moles of NH3 are produced?
Work:
Ans:__________
Answer:1.2molammonia formed
Explanation:
N2(g) + 3H2(g) → 2NH3(g)\
According to the above-balanced chemical equation
28g nitrogen reacts with 6g hydrogen to give out 34g ammonia,
therefore 16.7g nitrogen= 16.7*34/28=20.28g ammonia
the molecular weight of ammonia =17g/mol
therefore number of moles in 20.28g=20.28/17=1.2 mol
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What happens to the average kinetic energy of the molecules of a warm substance when the temperature of the substance is slightly decreased
When the temperature of a warm substance is slightly decreased, the average kinetic energy of the molecules of the substance decreases as well. This is because the temperature of a substance is directly related to the average kinetic energy of the molecules that make up the substance.
As the temperature of the substance is lowered, the average kinetic energy of the molecules also decreases, leading to a decrease in the overall temperature of the substance.
This decrease in temperature is a result of the decrease in the average kinetic energy of the molecules that make up the substance. This decrease in the average kinetic energy of the molecules is directly related to the decrease in temperature of the substance.Learn more about Temperature: https://brainly.com/question/25677592
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The ozone hole is largely a consequence of the use of __________.
a. nitrogen oxides
b. fossil fuels
c. chlorofluorocarbon refrigerants
d. carbon monoxide and carbon dioxide
The ozone hole is largely a consequence of the use of chlorofluorocarbon refrigerants. Therefore, option C is correct.
What is ozone layer?The ozone layer can e described as a region of Earth's stratosphere that absorbs the Sun's ultraviolet radiation. Ozone layer contains a high concentration of ozone to other parts of the atmosphere, although small in relation to other gases in the stratosphere.
The ozone layer consists less than 10 ppm of ozone, while the average ozone concentration in atmosphere as a whole is about 0.3 ppm. The ozone layer is found in the lower portion of the stratosphere, from approximately 15 to 35 km above Earth, although its thickness varies seasonally as well as geographically.
The ozone layer can be depleted by man made compounds, such as chlorofluorocarbons (CFCs) and bromofluorocarbons.
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Activity C (continued from previous page) 3. Calculate: Use the Gizmo to mix 200 g of granite at 100 °C with 1,000 g of water at 20°C. A. What is the final temperature?_22.93°C B. Calculate the temperature change of each substance by subtracting the initial temperature from the final temperature. AT water: 2.9390 AT granto: -77.07 122 59.12 J 9-(2000)4181)(2 93) C. How much heat energy (9) did the water gain? - D. Now solve for the specific heat (c) of granite: __6.795.J/g°C E. Repeat steps A through D to find the specific heat (c) of lead: _0013 Jlgºc 4 129 sau / 200 23.675 Do#y ONLY Challenge: Use the specific heat capacity that you calculated for granite to determine how many grams of granite at the initial temperature of 80 °C must mix with 3,000 g of water at the initial temperature of 20 °C to result in a final system temperature of 20.45 °C. (Hint: Start by calculating how much heat energy is needed to change the water's temperature by 0.45 °C). Show your work. Use the Gizmo to check your answer. Mass of granite = Al've included the granite info needed for this question dwide by
The mass of granite is 112 g.
What is mass ?
Mass, pronounced "măs," is a unit of measurement for the quantity of substance that comprises a physical body. In classical mechanics, an object's mass is important because it affects the amount of inertia it possesses and the force required to accelerate it according to Newton's equations of motion.
What is temperature ?
The average system kinetic energy is measured by temperature. The kinetic energy of a substance starts to rise as its particles move more quickly, which raises the system's temperature. When two bodies of varying temperatures come in contact with one another, heat is the energy that is transferred between them.
Specific heat capacity of water = 4.18 J/g
Q = (3000g) . (4.18 J/g °C) . ( 0.45 °C)
Q = 5643 J
T = 80°C - 20.45 °C
5643 = m . (0.79 J/g °C) . (59.55 °C)
5643 = m . 47.04
m = 112 g
Therefore , mass of granite is 112 g.
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calculate the density of na metal. the length of the body-centered cubic unit cell is 4.24å.
The density of Na metal is 1.002gcm-2 and the length of the body-centered cubic unit cell is 4.24å.
Third common packing arrangement in metals, is the body-centered cubic (BCC) unit cell has atoms at each of the eight corners of a cube plus one atom in the center of the cube. Because each of the corner atoms is the corner of another cube, the corner atoms in each unit cell will be shared among eight unit cells.
A body centered cubic unit cell contains 8 atoms at the corners and one is in the center.
Therefore, the total number of atoms per unit cell (n) = (8 ×1 / 8) + 1 = 2
Therefore, Density = n × at.wt / Av.Number × a³
2 x 23 / 6.023 x 10²³ x (4.24 x 10⁻⁸)³ = 1.022gcm-2
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Water is a polar solvent and hexane (C6H14) is a nonpolar solvent. Which of the following correctly describes the solubility of the solute?
Option d, NAHCO3, soluble in water, is the appropriate response to this McQuestion.
The family of inorganic compounds known as sodium bicarbonate (also referred to as washing soda, soda ash, and soda crystals) has the formula Na 2CO 3(H 2O)x, where x can be any value between 0 and 10. All forms are white, odourless salts that dissolve in water and produce alkaline solutions. As a result of hydrogen bonding. While Na2CO3 has no hydrogen bond donor sites, NaHCO3 does. One hydrogen bond for every four to five carbons in an organic compound may be sufficient to make it water soluble. AFAIK, the polymer anionic structure of NaHCO3 is held together by hydrogen bonds. A weak base, sodium bicarbonate separates into sodium and bicarbonate ions in water. It is therefore polar; sodium gains a positive charge while bicarbonate gains a negative charge.
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(01.01 LC)
What is an inference?
To solve this we must be knowing each and every concept related to inference. Therefore, in below given ways we can define an inference.
What is an inference?In Physics, interference is defined as a phenomena wherein waves superpose to generate a consequent wave of larger, lower, or equal amplitude. Both destructive and constructive interference both emerge from the interplay of waves that are related and coherent with one another according to their origin.
We know that constructive interference occurs when two waves combine to form a large wave, and destructive interference occurs when two waves cancel each other. The following graph depicts the distinction between the two forms of interference:
Therefore, in above given ways we can define an inference.
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