312.17 g iodine would react with 20.4 g aluminum completely to form aluminum iodide.
2Al + 3I2 → 2AII3
Mass of aluminum = 21.3 g
Moles of Aluminum = 21.4/ 27g/mol = 0.79mol
The stoichiometric mole ratio of iodine to Al : 3mol I2/2molAl
Moles of Iodine that would react with 0.756 mol Al =
0.79 × 3mol I2/2molAl = 1.23molI2
Mass of iodine = 1.23 molI2 * 253.81gI2/1mol I2 = 312.17g I2
Therefore, 312.17 g iodine would react with 20.4 g aluminum completely to form aluminum iodide.
An amalgam of aluminium and iodine, aluminium iodide is a chemical. The name is invariably used to describe a product with the chemical formula AlI 3, which is produced by the interaction between aluminium and iodine[4] or by the action of HI on aluminium metal. Aluminum hydroxide, hydrogen iodide, or hydroiodic acid react with metallic aluminum to produce the hexahydrate. AlI is related to the compounds chloride and bromide.
The Lewis acid 3, which is potent, will take water from the air. It serves as a reagent in the scission of particular types of C-O and N-O bonds. Additionally, it deoxygenates epoxides and cleaves aryl ethers.
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13. Ture/False: All Entropies Of Fusion Are Negative. True Fusion Leads To Less: Ture/False: All entropies of fusion are negative: True fusion leads to less microstates (degrees of freedom) Falsc fusion leads t0 more microstates (degrees of freedom) False fusion leads to less microstates (degrees freedom} True fusion leads t0 more microstates (degrees of freedom} This problem has been solved! See the answer
True. Fusion leads to more microstates ( degree of fusion). so, All entropies of fusion are negative.
Entropy is defined as the the measure of a system's thermal energy per unit temperature that is unavailable for doing useful work. Because work is obtained from ordered molecular motion the amount of entropy is also a measure of the molecular disorder or randomness of a system. The entropy of fusion is the increase in entropy when melting a solid substance. This is almost always positive since the degree of disorder increases in the transition from an organized crystalline solid to the disorganized structure of a liquid. The entropy of fusion is negative for helium-3 at temperatures below 0.3 K. Entropy of fusion is also negative for helium-4 at temperatures below 0.8 K.
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Draw the organic product for the following acid-catalyzed hydrolysis reaction. H2SO4, HzO'
Ester hydrolysis by the SN1 pathway is acid-catalyzed and reversible. By protonating carbonyl oxygen and making carbonyl carbon more vulnerable to nucleophilic attack, acid catalysts hasten the process.
An ester is hydrolyzed by acid to produce an alcohol and a carboxylic acid. An ester undergoes basic hydrolysis, yielding an alcohol and a carboxylate salt. Esters are hydrolyzed by acids in a pseudo-first order process.
H2SO4+H2O → HSO4 −+H3O+
With the addition of the components of water, a protic acid is employed to catalyze the breaking of a chemical bond by a nucleophilic substitution reaction in the process known as acid hydrolysis in organic chemistry (H2O). For instance, glucose is produced when cellulose or starch are converted. Sulfuric acid hydrates itself in a very exothermic process. Concentrated sulfuric acid catalyze can boil and spit violently if water is added to it. It is usually preferable to add acid to water rather than water to acid.
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design a synthesis of (s)-3-iodohexane from (r)-3-hexanol.
Alkanes are the simplest family of hydrocarbons, compounds containing only carbon and hydrogen, and only carbon-hydrogen bonds and carbon-carbon single bonds. Alkanes are less reactive and have little biological activity. All alkanes are colorless and odorless.
What are the applications of 3-hexanol?
n-Hexanol is a colorless liquid with a fruity smell. It is used in the production of flavoring additives, pesticides, leather processing, preservatives, perfumes, plasticizers and other chemicals. n-Hexanol is included on the Hazardous Materials List as cited by the DOT and NFPA.
What are alkanes?
In organic chemistry, alkanes or paraffins are saturated acyclic hydrocarbons. In other words, alkanes are composed of hydrogen and carbon atoms arranged in a tree structure in which all carbon-carbon bonds are single. Alkane has the general chemical formula CₙH₂ₙ₊₂
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As the term "peroxide" is used in Chapter 10, it can refer to which structure(s)? A) ROOR B) CH2OOCH O o RCOOLR c) RCOOCR D) Two of these choices. E) Three of these choices. ОЕ OD OC
As the term "peroxide" is used in Chapter 10 it can refer to RCOOCR structure.
Is peroxide harmful to the body?Hydrogen peroxide solutions up to 9% in concentration are often safe when consumed; nonetheless, even a 3% solution is slightly irritating to nasal mucosa and might result in vomiting and diarrhea. Industrial-strength solutions (10%) when consumed induce systemic toxicity and have been linked to deaths.
Is hydrogen peroxide the same as peroxide?The fact that oxygen is an anion and hydrochloric acid is a chemical substance is the main distinction between the two peroxides. The specific class of oxygen compounds known as peroxides has distinctive characteristics. Thenard, a French chemist, made the discovery of hydrogen peroxide in 1818.
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which of the substances is a liquid at room temperature? which of the substances is a liquid at room temperature? ch3ohch3oh ch3shch3sh
Ch3oh Ch3oh substances is a liquid at room temperature.
A sample of substance is considered to be liquid if it takes on the shape of the container in which it is contained and develops a distinct surface when gravity is present. We now turn our focus to three distinctive qualities of liquids that directly relate to the type of intermolecular interactions: surface tension, capillary action, and. The term "liquid" is also used to refer to the state, or condition, of matter having this property. viscosity. Although a liquid has a predetermined volume, its shape is not fixed. Blood, oil, and water are a few examples of liquids. A state of matter known as a liquid has a defined volume but no set shape. To put it another way, a liquid assumes the shape of its container.
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draw the shear diagram for the beam
Shear force is the vertical force acting on the beam or any other structure while the bending moment is the consequence of the structure rotating. See the diagram in the picture. Shear and Moment diagrams are used to show the various effective forces acting on a beam. I provided an explanation below.
The acronyms SFD and BMD stand for the structure's applied shear force diagram and bending moment diagram, respectively. To acquire the necessary strength and durability of the structure, you must take into account the overall shear force and bending moment while designing or analyzing any structure.
Shear force is the algebraic total of all vertical forces operating on the structure. It may be under the influence of an upward or downward force. It has the Newton SI unit (N). SFD is the term for the shear force's visual depiction (Shear force Diagram). The term "bending moment" refers to the algebraic sum of all moments acting on the structure. It might be moving in a clockwise or counterclockwise motion. Its Newton-meter SI unit is used (N-m). BMD is the abbreviation for the bending moment's graphic representation (Bending Moment Diagram).
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What’s the difference between a quantum leap and an electron transition
Answer: Quick Meaning and Difference
Explanation: As an electron moves from one level of energy to another within an atom or artificial atom, it appears discontinuous as it "jumps" from one level of energy to another. It is a form of deexcitation, atomic transition or quantum leap, this occurs when electrons are excited or de-excited. while In an atom or artificial atom, an electron transitions from one energy level to another. The quantum jump involves abruptly switching between quantum states or energy levels within a quantum system. A transition from one energy level to another occurs when the system absorbs energy; a transition from one energy level to another occurs when the system loses energy. I'm not sure quantum jumps even exist at the moment. A quantum leap has been the subject of controversy among physicists for over a century. The answer is now in, and everyone was a little bit right. Basically, quantum leaps or jumps are energy level jumps made by orbiting electrons in an atom. Atoms create photons when electrons move to a lower energy level and absorb them when electrons move to a higher energy level or leave the atom (ionization).
There is zero plagirism in this entire paragraph so feel free to copy and paste this into whatever assignment you like.
if the bond angle between two adjacent hybrid orbitals is 180°, which is the hybridization?
If The Bond Angle Between Two Adjacent Hybrid Orbitals Is 180 Hybridization is Sp2.
What is an orbital, exactly?A space object appears to follow an orbit as it moves around another space object. A satellite is a spacecraft that orbits the planet. A natural satellites that matches the Earth nor moon is one possibility. Moons are satellites in the orbits of numerous nations. A man-made satellite, such as the Space Stations, provides an additional choice.
How are orbitals created?The positions of the electrons are dictated by the entire molecule when several atoms unite chemically to form a molecule, combining the atomic orbitals into molecular orbitals. The molecular orbitals are occupied by the electrons of the component atoms. There are two electrons in each orbital, and their spins vary. An atom's orbital is the area of space where an electron resides.
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Provide the Lewis Structure of CH2CH2
The Lewis structure for ethene that is CH2CH2 is that each carbon has four valence electrons, from which it's going to use 2 of the electrons from every to make a double bond among them.
Determine the overall range of valence electrons. Step 2: Write the skeleton shape of the molecule. Step 3: Use valence electrons to shape every bond withinside the skeleton shape. Step four: Try to fulfill the octets of the atoms through dispensing the last valence electrons as nonbonding electrons.For C2H4 you've got got a complete of 12 overall valence electrons.
Drawing the Lewis shape for C2H4 (named ethene) calls for the usage of a double bond. In a double bond pairs of valence electrons are shared (for a complete of 4 valence electrons). The electron dot shape of ethene, C 2 H four : The overall range of valence electrons gift in. Here the significant atom is carbon, while Hydrogen is selected because the aspect atom.
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draw the major product for each of the following reactions
Major product: The product that is produced in the greatest amount in a chemical reaction.
What are chemical reactions?
A chemical reaction is the process of chemically transforming a set of chemicals into another chemical. Classically, chemical reactions involve changes that affect only the positions of electrons in forming and breaking chemical bonds between atoms, without changes in the nucleus (no changes in the elements present), often , which can be written as a chemical equation. Nuclear chemistry is a subfield of chemistry that deals with chemical reactions of unstable radioactive elements in which both electronic and nuclear changes can occur.
The substances that first participate in a chemical reaction are called reactants or reagents. A chemical reaction is usually characterized by a chemical change, usually resulting in one or more products with different properties than the reactants. Reactions often consist of a series of individual steps, so-called elementary reactions, and information about the exact process is part of the reaction mechanism. Chemical reactions are described using chemical formulas that symbolically represent starting materials, final products, sometimes intermediates, and reaction conditions.
Therefore, Major product: The product that is produced in the greatest amount in a chemical reaction.
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Complete question is: What is a major product? draw the major product for each of the following reactions?
An atomic anion with a charge of -2 has the following electron configuration: 1s22s22p63s23p6. What is the chemical symbol for the ion? How many electrons does the ion have? How many 2s electrons are in the ion?
The chemical symbol for the anion is Ar+2. The ion has 20 electrons. There are 2 2s electrons are in the ion.
Ar+2 is the atomic anion.
The anion electrical structure is as follows:
1s2,2s2,2p6,3s2,3p6,3d2
For an electrically neutral atom, the number of electrons is equal to the number of protons.
The atoms in this instance have gained two electron and are now anion.
As a result, the atom's electrically neutral state is denoted as follows:
1s² 2s² 2p⁶ 3s² 3p⁶
The neutral atom's number at atomic structure will be 2 + 2 + 6 + 2 + 6 = 18
As a result, since it gained 2 electron, the element is Argon , and the ion's symbol is Ar+2.
1s2,2s2,2p6,3s2,3p6,3d2 is the ion's electrical configuration. Since it lost one electron, the ion's total number of electrons is now
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Draw the Lewis structure of acetone, CH3COCH3 and chloroform, CHCl3 using correct bond angle relationships; include partial charges on each atom (if any). Show how these two molecules position themselves when next to each other and show the attraction using a dotted line. Answer questions→ a) List the primary and secondary intermolecular forces (in the order of significance or strength) in acetone: ________________ , _________________ b) Is acetone a polar or nonpolar molecule? _______________ , c) Which is more polar, acetone or chloroform? ________________ . d) Do you predict the ∆Hsln for mixing acetone with chloroform to be positive (>0), negative (<0) or close to zero (ideal solution)? Explain why.
All of the atoms in the Lewis structure of CHCl3 have a formal charge of zero.
Exists hydrogen bonding in CH3OCH3?Since there are no H-atoms directly connected to O in dimethyl ether (CH3OCH3), ethers cannot form an H-bond. Due to the stearic repulsion of the R-groups in ethers, the H-bond formed with the O-atom of ether is extremely weak even when ether is combined with polar solvents like H2O or H2O2.
What are the acetone bond angles?Acetone's main atom is the red-hued carbon. A double bond and two single bonds make up the three electron groups that make up this carbon. Acetone has a trigonal planar structure with 120o bond angles, in accordance with All of the atoms in the Lewis structure of CHCl3 have a formal charge of zero.
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Question Bond order allows us to identify: Select the correct answer below: O the mass of O the electrons based on O bond strength the O net combination of electrons for O the bond strength of a molecule both A and B O neither A or B B FEEDBACK MORE INSTRUCTION 50 g acer
The net combination of electron for the bond strength of a molecule , Bond order allows us to identify.
In chemistry, the strength with which a chemical bond keeps two atoms together is known as bond strength. The energy needed to break the bond is often given in units of kilocalories per mole. As the number of electron pairs in a bond between two atoms rises, so does the bond's strength. Thus, triple bonds are stronger and shorter than double bonds between the same two atoms, and double bonds are similarly stronger and shorter than single bonds between the same two atoms.
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give the major product of the following reaction
Major product CHCI is the reaction's main byproduct.
What are the primary and secondary products?Large and Small Products
The product that was created using Markovnikov's rule is considered to be the major product out of the two conceivable products. Most of the time, this substance will form (70%–95%). The minor product is the name for the substitute.
What is the primary outcome of the HCl reaction?When 1,3-butadiene and HCl are combined at a higher temperature (100 oC or above), 1-chloro-2-butene is the main byproduct produced. This is an illustration of a 1,4-addition reaction where a C=C double bond is rearrange.
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briefly explain how annealing of an undeformed material influences the tensile modulus of a semicrystalline polymer and why
When an unstructured crystals polymer is annealed considerably below melting temperature, its tensile modulus increases.
What is modulus with example?The portion left over after dividing one integer by another is known also as modulus (or "modulus" or "mod"). For instance, 100 mod 9 is 1. due to the fact that 100/9 Equals 11 with a residue of 1. Here's another illustration: 14 modulo 12 equals 2. since the remainder is 2, and 14/12 = 1.
What is modulus value?No matter what that's sign, a real number's non-negative value, or absolute value (or modulus), is | x |. For instance, five has an absolute value of five, and five less five also has an absolute value of five. To measure the elastic modulus, we often use megapascals (MPa) or gigapascals (GPa).
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Drag the labels to identify the sequence of events that occurs at a synapse.
Most studied answer
1) An action potential arrives at the synaptic terminal.
2) Calcium channels open, and calcium ions enter the synaptic terminal.
3) Vesicles containing neurotransmitter fuse with the plasma membrane of the sending neuron.
4) Neurotransmitter molecules diffuse across the synaptic cleft.
5) The neurotransmitter molecules bind to receptors in the plasma membrane of the receiving neuron, causing ion channels there to open.
In the case-
1) At the synaptic terminal, an action potential arrives.2) The synaptic terminal's calcium channels open, allowing calcium ions to enter.3) The plasma membrane of the transmitting neuron and vesicles containing neurotransmitters merge.4) The synaptic cleft is traversed by molecules of neurotransmitters.5) Ion channels in the receiving neuron's plasma membrane open as a result of the neurotransmitter molecules attaching to receptors there.what is synapse?
At junctions known as synapses, neurons talk to one another. One neuron communicates with a target neuron, or another cell, at a synaptic junction.
Chemical messengers are used by the majority of synapses to communicate. Other synapses are electrical; ions move directly between cells in these synapses.
An action potential causes the presynaptic neuron at a chemical synapse to release neurotransmitters. These substances attach to the postsynaptic cell's receptors and alter the likelihood that it will release an action potential.
One axon may have several branches, allowing it to form synapses with different postsynaptic cells. The same is true for presynaptic—sending—neurons, which can deliver thousands of synaptic inputs to a single neuron.
Numerous synaptic vesicles can be seen inside the axon terminal of a transmitting cell. Neurotransmitter molecules are contained within these membrane-bound spheres. The axon terminal of the presynaptic neuron and the membrane of the postsynaptic cell are separated by a tiny space known as the synaptic cleft.
Action potentials, or nerve impulses, cause voltage-gated calcium channels in the cell membrane to open when they reach the axon terminal. Ca 2+ rushes into the cell from the exterior, where its concentration is significantly higher than its interior. Ca 2+ enables the fusion of synaptic vesicles with axon terminal membrane, which releases neurotransmitter into the synaptic cleft.
Neurotransmitter molecules diffuse across the synaptic cleft and interact with receptor proteins on the postsynaptic cell. Ion channels in the cell membrane open or close in response to the activation of postsynaptic receptors. Depending on the ions involved, this might depolarize the cell, making it more positive, or it could hyperpolarize the cell, making it more negative.
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Rank the following compounds in order of basicity: pyridine, 3-nitropyridine, 3-chloropyridine.
The order of basicity for these compounds is:
Pyridine.3-nitropyridine.3-chloropyridine.The basicity of a compound refers to its ability to donate a pair of electrons. In general, the more electronegative an atom is, the less basic a compound will be. The electronegativity of the atoms in a compound can be used to predict its basicity.
In the case of the compounds you listed, pyridine is the most basic because it has the least electronegative atoms. 3-nitropyridine is less basic than pyridine because it has a nitro group (-NO2), which is more electronegative than a hydrogen atom. Finally, 3-chloropyridine is the least basic because it has a chlorine atom, which is even more electronegative than a nitro group.
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nickel metal is electroplated from a niso4 solution. a constant current of 8.06 amps is applied by an external power supply. how many hours will it take to deposit 135.3 g of ni
There are 23.1 hours taken to deposit.
Solution:
3600 Sec = 1hr
1 Sec = 3600
83500 = 83500 hr/3600 = 23.1 hr
Each bank has different rules, but you can expect most direct deposits to be in your bank account by midnight. This is because some financial institutions update accounts several hours after midnight. The bank must make the first $225 of the deposit available for cash withdrawal or check by the beginning.
The business day following the business day of the bank on which the deposit was made. Usually, the rest of the deposit will be available on his second business day. Pending deposits cannot be withdrawn. However, it will be credited to your account within 1-2 business days. To check the status of your deposit, choose the experience that best suits you below.
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HELPPPPPPPPPPPPPPPPP
Thermal energy - found when internal energy is transferred
Electrical energy - found in the flow of electrical charges
Chemical energy - found in the bonds between atoms
Nuclear energy - found in the nucleus of an atom
what is atomic packing of the (100) plane for the fcc crystal structure?
There are one atom in the center and four atoms at each of the four corners of the (100) plane.
The unit cell contains one-fourth of each corner atom and the complete middle atom, making the total number of atoms on the (100) plane inside the cell N100 = 4 (1/4) + 1 1 = 2.
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Which of the following is true of a compound?
O A compound must be a solid at room temperature.
O A compound is a substance that cannot be separated into simpler substances by chemical means.
O A compound is combination of two or more substances in which the substances retain their distinct identities.
O A compound is a substance composed of atoms of two or more elements chemically united in a fixed ratio.
O A compound must be heterogeneous.
True compound is O A compound is a substance composed of atoms of two or more elements chemically united in a fixed ratio.
A compound is a substance composed of atoms of two or more elements chemically united in a fixed ratio. It cannot be separated into simpler substances by chemical means and retains its distinct identities. A compound may be a solid, liquid, or gas at room temperature, and may also be homogeneous or heterogeneous.
A homogeneous compound is a substance that is made up of only one type of atom or molecule. Examples of homogeneous compounds are water (H2O), carbon dioxide (CO2), and table salt (NaCl).
A heterogeneous compound is a mixture of two or more substances in which the components retain their individual physical properties. Examples of heterogeneous compounds include mixtures of oil and water, concrete, soil, and even a glass of iced tea.
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The cell diagram for the lead-acid cell that is used in automobile and truck batteries isWhere the comma between PbO2(s) and pbSO4(s) denotes a heterogeneous mixture of the two solids and the right ?hand lead electrode is nonreactive. (a) Write the balanced equation for the net cell reaction (b)Look up standard potentials for the oxidation and the reduction, then calculate the value of E cell. Number V (c) Calculate the value of Delta G Number k.j. mol^-1 (d) Calculate the value of E cell at 25 degree C if [H2 SO4]= 10.0 M. Number V (e) How many lead-acid cells are in a 12 V car battery? Round to the nearest integer.
The lead-acid battery used in truck and car batteries is depicted in the following cell diagram: The comma between PbO2(s) and pbSO4(s) indicates that the two solids are heterogeneously mixed, and the right
(a)The balanced net cell reaction is given below.
[tex]Pb(s)+PbO_2(s)+2H_2SO_4(aq) \rightarrow 2PbSO_4(s)+2H_2O(l)[/tex]
(b)The standard potentials for cathode and anode are as given below.
[tex]E^0_{anode}[/tex]=+1.685V
[tex]E^0_{anode}[/tex]-0.356V
[tex]E^0_{cell}=E^0_{cathode}-E^0_{anode}[/tex]=1.685V-(-0.356V)=2.041V
(c) [tex]\Delta G^0 =-nFE^0_{cell}=-2 \times 96500 \times 2.041=[/tex]-393913 J/mol = -393.9 kJ/mol
(d)[tex]E_{cell}=E^0_{cell}+\frac {0.0592}{2}log[H_2SO_4]=2.041 V+\frac {0.0592}{2}log10.0[/tex]=2.071V
(e) The number of lead-acid cells in a 12 V car battery = [tex]\frac {12}{2.071} \approx 6[/tex]
Two electrodes that are buried in a sulfuric acid electrolyte make up a lead-acid battery. In contrast to the negative electrode, which is fastened to a grid of metallic lead, the positive electrode is constructed of metallic lead oxide grains. Both flooded and valve-regulated lead-acid batteries fall within this category. Although less expensive than valve-regulated lead-acid batteries, flooded lead-acid batteries need more ventilation and maintenance. Due in large part to their portability and affordable price, lead-acid batteries are frequently employed in renewable energy systems. The low number of charging-discharging cycles, low discharge intensities, short lives, and slow charging rates of these batteries provide several difficulties.
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calculate the acid concentration of a sample of acid rain with a ph of 4.20
The acid concentration of a sample of acid rain with a pH of 4.20 would be 0.000063 M.
What is pH?
The pH of a substance is the degree of acidity or alkalinity of a substance. It is mathematically expressed as:
pH = - log [[tex]H^+[/tex]]
Where [[tex]H^+[/tex]] is the hydrogen ion concentration or molarity of the solution.
In this case, the pH is 4.20. Substituting into the equation:
4.20 = - log [[tex]H^+[/tex]]
log [[tex]H^+[/tex]] = - 4.20
[[tex]H^+[/tex]] = Antilog -4.20
= 0.000063 M
Thus, the concentration of the sample acid rai with a pH of 4.20 would be 0.000063 M
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study smarter is a transition allowed in sodium? if so, what is its wavelength (in nm)? if not, why not?
Here, sodium is allowed to shift from 4p to 4s, and its wavelength is 2.214 m. A wave's wavelength is described as the characteristic that measures the separation between adjacent spots.
Calculations are made between the two succeeding waves. The Greek letter lambda () is used to represent it. Thus, the wavelength is defined as the separation between one wave's crest or trough and the following wave. The chemical element sodium has the atomic number 11 and the letter Na, which derives from the Latin natrium. It is a malleable, silvery-white, and extremely reactive metal. In group 1 of the periodic table, sodium is an alkali metal.
a change from 4p to 4s
As l = 1 for a 4p state and I = 0 for a 4s state, this transition is permitted because l = 1 - 0 = 1
4p (Ei) = 3.75 eV energy
Energy of 4s (E2) = 3.19 eV,
with = 1240 eV nm / (E2 - E1) = 2214 nm 2.214 m.
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The complete question is-
Is a 4p S 4s transition allowed in sodium? If so, what is its wavelength? If not, why not?
What is the energy of each of the following photons in kilojoules per mole?
a) ν= 5.92×1019 s−1
b) ν= 1.24×106 s−1
c) λ = 265 m
the energy of every photon in the list below, expressed in kilojoules per mole 2.362*10^7 KJ/mol,4.948*10^-7 KJ/mol,4.517*10^-7 KJ/mol
1) Given:
f = 5.92*10^19 s-1
Find energy of 1 photon first
use:
E = h*f
=(6.626*10^-34 J.s)*(5.92*10^19) s-1
= 3.923*10^-14 J
Energy of 1 mol = energy of 1 photon * Avogadro's number
= 3.923*10^-14*6.022*10^23 J/mol
= 2.362*10^10 J/mol
= 2.362*10^7 KJ/mol
2)Given:
f = 1.24*10^6 s-1
Find the energy of 1 photon first
use:
E = h*f
=(6.626*10^-34 J.s)*(1.24*10^6) s-1
= 8.216*10^-28 J
Energy of 1 mol = energy of 1 photon * Avogadro's number
= 8.216*10^-28*6.022*10^23 J/mol
= 4.948*10^-4 J/mol
= 4.948*10^-7 KJ/mol
3)Given:
[tex]\lambda[/tex] = 2.65*10^2 m
Find the energy of 1 photon first
use:
E = h*c/l[tex]\lambda[/tex]
=(6.626*10^-34 J.s)*(3.0*10^8 m/s)/(2.65*10^2 m)
= 7.501*10^-28 J
This is the energy of 1 photon
Energy of 1 mol = energy of 1 photon * Avogadro's number
= 7.501*10^-28*6.022*10^23 J/mol
= 4.517*10^-4 J/mol
= 4.517*10^-7 KJ/mol
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a theory stating that a chemical reaction occurs only when reactants strike each other at the correct orientation and with sufficient kinetic energy
A collision hypothesis that claims a chemical reaction can only happen when reactants collide at the right angle and with enough kinetic energy.
What in chemistry is a reactant?A material that's also present at the outset of such a chemical reaction is known as a reactant. Products are the substrate(s) to the side of the arrow. A component that remains after a chemical reaction is finished is known as a product.
Which side are the products and reactants?The chemicals (what you started with) be transformed into byproducts in a chemical process (what you end with). An arrow separates the reaction mixture, which are indicated on the left side of a solution, from the products, who are depicted on the right.
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draw the product(s) formed by heating the following compound in basic ethanol.
2-Ethyl-1-butene is a minor product whereas 3-methyl-2-pentene is the main one.
3-Bromo-3-methyl pentane is the alkyl halide shown. This tertiary alkyl halide can be seen. The Markovnikov rule is used to calculate the percentage of products that are produced throughout the reaction.
This process produces 2-ethyl-1-butene and 3-methyl-2-pentene as its two byproducts. Due to the fact that it is produced from a more stable carbocation intermediate, 3-methyl-2-pentene is the main byproduct. The minor product is 2-ethyl-1-butene.
When an acid catalyst is present, the typical reaction of benzonitrile with ethanol is expressed as follows:
C₆H₅CN + CH₃CH₂OH + H⁺ → C₆H₅ CO NH CH₂CH₃ (N- ethyl acetamide)
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How many grams of iron could be
recovered from 80.0 g of an ore that is known to be 76.0 % Fe3O4?
Answer:
43.8 g of iron can be recovered
Explanation:
First get the mass of Fe3O4 in the ore:
80g Ore * (76 g Fe3O4 / 100 Ore) = 60.8 g Fe3O4
Then get number of moles of Fe3O4:
60.8 g Fe3O4 * 1 mol / 231.535 g = 0.262 mol Fe3O4
**231.535 g is the molar mass of Fe3O4
Then get number of moles of Fe:
0.262 mol Fe3O4 * (3 Fe / 1 Fe3O4) = 0.786 mol Fe
** 3 atoms of Fe in every Fe3O4
Finally convert moles of Fe to grams of Fe:
0.786 mol * 55.845 g/mol = 43.79 g Fe --round to 3 sig figs--> 43.8 g Fe
if 1.0 mol of mg is mixed with 2.0 mol of br2, and 0.37 mol of mgbr2 is obtained, what is the percent yield for the reaction?
The equation states when 1.0 mol if mg was combined to 2.0 mol of br2, 0.37 mol of mgbr2 was produced, as well as the percentage yield for reaction is 41.99%.
What is the meaning of reaction and example?A reaction is a course of action that is conducted in response to something. If you tell your parents you want to move out, one can tell if they're displeased by their reaction. Physical elements are typically present in reactions.
Briefing:amount of magnesium moles = 1 mole
amount of bromine gas in moles = 2 moles
obtained moles for magnesium bromide= 0.42 moles
percent yield =?
chemical reaction balance: Mg Br₂ + ⇒ Mg₂
MgBr2 was produced when 1 mole when Mg interacted.
Br2 interacted to produce 1 moles of MgBr2.
Br2 was reacted to produce 2 moles of MgBr2.
limiting reagent is Mg
hence, mass produced is 1 mole Mg = 1 x 184.11
mass obtained = 184.11 (theoretical yield)
actual yield = 0.42 x 184.11
actual yield = 77.32 grams
percent yield =actual yield/theoretical yield*100
the values being entered into the equation:
77.32/184.11*100
=41.99%
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which one of the following statements about the wave described in the problem introduction is correct?
The problem's introduction's description of the wave, which is going in the +x direction, is accurate.
How can you know if a wave is moving left or right?Due to the particles just on left side of the wave going upward and approaching their peak, the wave is traveling to the left. Alternatively, if the particles just on right are traveling up and the particles just on left are moving down, the wave is moving to the right.
What waves moving to the left and right?When a wave's disturbance travels perpendicular to the wave's direction, the wave is said to be transverse. While the disturbance swings up and down, you might imagine the wave going from left to right. A water wave with up-and-down water movement as it travels across the ocean is an illustration of a transverse wave.
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