to determine the mass number of the daughter product after alpha decay has taken place Subtraction of 4 from the parent element yields the mass of the daughter product. Subtraction of 2 from the parent atom yields the atomic number of the daughter product.
Assume X is a parent element with atomic number Z and mass number A; if X decays, we obtain a daughter element Y with atomic number Z1 and mass number A1, as well as an alpha particle with atomic mass 2 and mass number 4. An alpha particle is a doubly ionised Helium atom with atomic number 2 and mass number 4.
Alpha degeneration
X4 → YA¹ + He.
The mass numbers and atomic numbers of a reaction must be balanced on either side of the equation.
→ A=A1+4
Z = Z1+2
As a result, A1 = A-4 and Z1 = Z-2.
As a result, subtracting 4 from the parent element yields the mass of the daughter product.
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which of the following statements are true? select all that apply. which of the following statements are true?select all that apply. the larger the atom, the more polarizable it is. in terms of the total attractive forces for a given substance, the contribution of dipole-dipole interactions, when present, are always larger than the contributions of dispersion forces. all other factors being the same, dispersion forces between linear molecules are greater than dispersion forces between molecules whose shapes are nearly spherical. when comparing ne and xe , the boiling point of ne is expected to be higher because dispersion forces decrease going down a column in the periodic table. for molecules with similar molecular weights, the dispersion forces become stronger as the molecules become more polarizable
The true statements are 1, 3, 4 and 5 for the properties of atom and molecules.
Define the term chemical bond?Atoms in molecules are held together by chemical bonds. Electrostatic forces between negatively charged electrons and positive charge atomic nuclei give rise to bonds.1. The statement is true:
Generally speaking, polarizability increases as electron volume increases. This happens in atoms because larger atoms have less firmly bound electrons compared to smaller atoms, which have more loosely held electrons. More polarizable than smaller atoms are larger molecules, atoms, or ions.2. The statement is false.
As we go down the group, the dispersion forces increases and they can be stronger than any other interactions.3. The statement is true.
In comparison to molecules with a linear shape, spherical molecules have less surface area and a lower dispersion force.4. The statement is true.
As the polarizable size of the molecules increases down the group, the boiling points also increase. As you move down the column of noble gases, their increasing diameters and resulting greater and greater London dispersion forces are apparent. The boiling point is set by these intermolecular interactions. The easier it is to separate the atoms, the smaller the force.5. The statement is true.
The dispersion forces get stronger when polarizability increases. As a result, molecules are more attracted to one another, and the melting and boiling points of covalent compounds increase with increasing molecular mass. Through the affected molecules' impacted molecules' molecular shapes, polarizability also affects dispersion forces.To learn more about chemical bonds visit:
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Mg2+
Draw the Lewis dot structure for Mg2+. Show the charge. To change the symbol of an atom, double-click on the atom and enter the letter of the new atom.
In the two outermost orbitals of magnesium atoms, there are two electrons. In order to become Mg2+, an atom can shed two electrons.
Dots of electrons are represented as Lewis structures, sometimes known as Lewis symbols. In order to create the magnesium ion, or Mg2+, two electrons are supplied by the Mg atom.
As opposed to Mg2+, whose electronic configuration was discovered to be 1s2 2s2 2p6, which has the electron density of Mg as 1s2 2s2 2p6. Magnesium has a 12 atomic number.
Create a Lewis electronic band diagram by picturing the sign for mg inside a box that contains all of the core electrons. The valence electrons are then positioned so that the greatest energy level orbital on each of the box's sides corresponds to their placement.Eight electrons from the Mg2+ ion occupy the empty space in the second orbital.
Here, it should be noted that this ion possesses 8 electrons and a 2 valence shell. As a result, the Lewis structure includes eight points, and because it is a charged molecule, it is also necessary to mention the net charge. Consequently, Mg2Lewis +'s structure.
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a bottle of perfume is dropped in the corner of a room; the scent can be detected everywhere gas law
A bottle of perfume is dropped in the corner of a room, the scent can be detected everywhere because of diffusion.
If a perfume bottle is opened in the corner at a room, the scent can be detected everywhere on the room because of the diffusion. Diffusion can be defined as the movement of the particles from the higher area to the lower concentration area.
Thus, The gas in the perfume bottle is at the higher concentration in the bottle and when we opened the bottle the gas present in the form of perfume travel from higher concentration to the lower concentration.
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calculate position of fermi level in n-type silicon with donor concentration of 3x1017 cm-3 at room temperature.
Above 0.115eV from fermi level conduction level is there.
[tex]\begin{aligned}& \eta=3 \times 10^{17} \\& N_c=4.82 \times 10^{15}\left(\frac{m_n}{m}\right)^{3 / 2} T^{3 / 2} \\& N_c=4.82 \times 10^{15} \times(300)^{3 / 2} \quad\left[\because \frac{m n}{m}=1\right] \\& N_c=4.82 \times 10^{15} \times(300)^{3 / n} \quad \\& N_c=250.45 \times 10^{17}\end{aligned}[/tex]
[tex]\begin{aligned}& E_C-E_F=0.026 \ln \left(\frac{250.45}{3}\right) \\& E_C-E_F=0.026 \times 4.42 \\& E_C-E_F=0.115 \mathrm{ev} . \\& E_C=E_F+0.115 \mathrm{VN}\end{aligned}[/tex]
Above 0.115eV from fermi level conduction level is there.
The Fermi Level is the maximum energy level an electron may occupy when it is at absolute zero degrees Fahrenheit. Since the electrons are all in the lowest energy state at absolute zero, the Fermi level is located between the valence band and conduction band.
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ammonium nitrate decomposes explosively upon heating according to the following balanced equation: 2nh4no3(s)→2n2(g) o2(g) 4h2o(g) part a calculate the total volume of gas (at 135 ∘c and 769 mmhg ) produced by the complete decomposition of 1.59 kg of ammonium nitrate.
The answer is 1687.74 L.
Solution:
PV = nRT
Divide both sides by P
V = nRT / P
V = (68.25 × 62.363 × 297) / 749
V = 1687.74 L.
Heating ammonium nitrate NH4NO3 produces nitrous oxide N2O and water H2O. The above equation is the balanced chemical reaction for the decomposition of ammonium nitrate when heated. 1 mol of ammonium nitrate breaks down into 1 mol of nitrous oxide and 2 mol of water molecules.
As mentioned earlier, potassium nitrate decomposes into metallic nitrites and oxygen gas. Potassium nitrate can be said to not produce nitrogen dioxide when heated. However, at sufficiently high temperatures, ammonium nitrate itself can violently decompose. This process produces gases such as nitrogen oxides and water vapor. It is this rapid release of gas that causes the explosion.
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discuss the equilibrium that eventually results if a solid is placed in an initially evacuated closed container and is maintained at a given temperature
The equilibrium that eventually results if a solid is placed in an initially evacuated closed container and is maintained at a given temperature: Thermal equilibrium exists because the solid attains the temperature.
Equilibrium does no longer necessarily imply that reactants and merchandise are present in the same amounts. It approaches that the response has reached a factor in which the concentrations of the reactant and product are unchanging with time due to the fact the ahead and backward reactions have identical charges.
The equilibrium rule says that if a system is in equilibrium then the sum of all of the forces or the net pressure appearing at the machine is 0 due to which the system does now not reveal any linear acceleration and stays at relaxation or moves with a steady velocity. we can write it down as ∑F=zero.
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Many organic reactions involve more than a single step. A reactive species that formed in one step and used up in the next is called a reactive _____. Such a reactive species can sometimes be isolated, even though it may be short-lived, unlike the ____ state, which is the unstable energy maximum for each step.
A reactive species that formed in one step and used up in the next is called a reactive intermediate. Such a reactive species can sometimes be isolated, even though it may be short-lived, unlike the transition state.
A certain configuration along the reaction coordinate constitutes the transition state of a chemical reaction. It is described as the condition corresponding to the maximum potential energy along this reaction coordinate. When a molecule is in a transitional state, it is neither a substrate nor a product. The transition state, an unstable structure that exists between the chemical structures of substrates and products, is the first step in every chemical transformation.
A short-lived, highly reactive molecule with high energy is known as a reactive intermediate or an intermediate. It swiftly transforms into a more stable molecule when produced in a chemical process. These chemicals can only be isolated and kept in storage under rare circumstances. Carbocation, carbanion, and the free radical are the three reactive intermediates.
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A diatomic element has six bonding electrons, six non-bonding electrons, and 2 anti-bonding electrons. What is the bond order?.
Answer:
10 pts
Explanation:
how many liters of a 0.209m ki solution is needed to completly react with 2.43 g of cu(no3)2 according to the balanced chemical reaction
0.124L of 0.209m ki solution is needed to completely react with 2.43 g of cu(no3)2, by Stoichiometric coefficient
Stoichiometric coefficient is the number written in front of atoms, ion and molecules in a chemical reaction to balance the number of each element on both the reactant and product sides of the equation
Consider the following reaction
aA + bB → cC + dD , This reaction says that for a complete reaction a moles of A will react with b moles of B to produce c moles of C and d moles of D
The balanced reaction for the above given case will be
[tex]2Cu(NO_{3})_{2}[/tex] + [tex]4KI[/tex] → [tex]2CuI[/tex] + [tex]I_{2}[/tex] + [tex]4KNO_{3}[/tex]
2.43 g of Cu(NO3)2 = 1.30 × [tex]10^{-2}[/tex] moles.
Number of moles of KI = 2.60 × [tex]10^{-2}[/tex] moles
To calculate the volume of KI needed, we use the formula
M = n OR V = n ⇒ 2.60 × [tex]10^{-2}[/tex]
V M 0.209
V = 0.124L
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If the density of carbon tetrachloride is 0. 793 g/ml, and a sample has a volume of 9. 29 ml, what is the mass?.
If the density of carbon tetrachloride is 0. 793 g/ml, and a sampl.e has a volume of 9. 29 ml the mass is 7.367 g
For CCl4
Density of carbon tetrachloride = 0.793 g/ml
Volume of sample = 9.29ml
mass = density * volume = 0.793 × 9.29 = 7.367 g
The chemical name for carbon tetrachloride, sometimes referred to as tetrachloromethane and recognized by the IUPAC, carbon tet in the cleaning business, Halon-104 in firefighting, and Refrigerant-10 in HVACR, is CCl4. It is an organic compound. It has an indistinct color and a just perceptible "sweet" odor. At lower temperatures, it is almost incombustible. Prior to being phased out because to environmental and safety concerns, it was frequently used in fire extinguishers, as a predecessor to refrigerants, and as a cleaning agent. The central nervous system can be impacted as well as the liver and kidneys when exposed to high amounts of carbon tetrachloride, particularly its vapor. An extended exposure risk can be lethal.
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true or false: if you followed a single carbon atom in a glucose molecule that goes through cellular respiration, you could eventually find that carbon atom in a molecule of carbon dioxide.
True, if you followed a single carbon atom in a glucose molecule that goes through cellular respiration, you could eventually find that carbon atom in a molecule of carbon dioxide.
This is where the citric acid metabolic pathways of cellular respiration occur. After the glycolysis process happens in cell cytoplasm to form pyruvate from glucose molecules, the pyruvate is converted to acetyl-CoA that enters the mitochondria for the TCA cycle. The TCA produces more ATPs from the energy molecule. The carbon atoms will ultimately be expelled from the cell as carbon dioxide.
Reaction involved: (glucose) C₆H₁₂O₆ (s) + 6 O₂ (g) → 6 CO₂ (g) + 6 H₂O (l) + heat energy
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when two oxygen atoms form a chemical bond in a system, what happens to the energy and the stability of the system?
When two oxygen atoms form a chemical bond in a system its energy decreases and stability increases.
When two atoms join together to form a chemical bond, they either transfer or share electrons to create a new molecule. The negatively charged particles known as electrons are found in various energy levels around the atomic nucleus.
The outer electrons of two oxygen atoms are drawn in by the nuclei of both atoms when they are in close proximity to one another. Two electrons from each atom are shared in this situation. An example of this is a double bond. Each oxygen atom contains a total of eight valence electrons because they share two pairs of them. Its outer energy level is filled, providing it the most stable configuration of electrons. In its simplest form, oxygen is a diatomic molecule. Since each oxygen only contains six electrons, it must share them with another oxygen to form two bonds. An example of this is a double bond.
Thus, When two oxygen atoms form a chemical bond in a system its energy decreases and stability increases.
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predict the bond order for the molecule cs2, which exists in the gas phase at high temperature. would cs2 be paramagnetic or diamagnetic?
The CS₂ molecules has bond order has two and has diamagnetic behaviours.
A volatile liquid with the chemical name carbon disulfide, CS₂ is an organosulfur compound. It is also known as methanedithione, disulfidocarbon, and carbon bisulfide.Sulfur, bromine, lipids, rubber, phosphorus, asphalt, selenium, iodine, and resins can all be dissolved in carbon disulfide. It is frequently employed in the production of flotation agents as well as the purification of single-walled carbon nanotubes. Carbon disulfide is a toxic, combustible, colourless to light yellow, volatile liquid with a pungent odour. It is insoluble in water and has a flash point of -22°F. It sinks because it is denser than water.
Hence, carbon covalently bond with Sulphur to carbon disulphide.
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how many grams of sodium chloride are there in 550.0 ml of a 1.90 m aqueous solution of sodium chloride? question 28 options: 6.11 × 104 61.1 30.5 1.05 122
61.1 grams of sodium chloride.
Molar concentration is a unit of measurement for the concentration of a chemical species, specifically a solute, in a solution, expressed as the amount of substance per unit volume of solution. The most commonly used unit for molarity in chemistry is the number of moles per liter, denoted by the unit symbol mol/L or mol/dm³ in SI units.
Molarity (M) is the most commonly used unit of solution concentration and is defined as the amount of solute in moles divided by the volume of solution in liters:
M = moles of solute/liters of solution.
A mole is a unit of measurement for a chemical substance, from which the term "molarity" derives.
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Write a nuclear equation to describe the spontaneous fission of 243 95am to form i-134 and mo-107. Determine how many neutrons are produced in the reaction.
Following is the nuclear equation for the spontaneous fission of ₉₅Am²⁴3 , which results in the formation of ₅₃I¹³⁴ + ₄₂Mo¹⁰⁷ and three neutrons:
₉₅ Am²⁴3 -----> ₅₃I¹³⁴ + ₄₂Mo¹⁰⁷ + 3 ₀n¹
What is neutrons?The neutron is a subatomic particle that has a neutral charge, the sign n or n0, and only a little bit more mass than a proton. The atom's nucleus is made up of protons and neutrons. All other nuclei require neutrons to remain stable, with the exception of the hydrogen atom, which has a single proton. Large numbers of neutrons are produced by both nuclear fusion and fission. They are crucial to the fission, fusion, and neutron capture processes that result in the nucleosynthesis of chemical elements in stars.
What are neutrons found in an atom?Two subatomic particles known as neutrons and protons are found in the nucleus of every atom. The only exception is hydrogen, which has one proton in its nucleus. Neutrons are somewhat heavier than positively charged protons and have an electric charge that is neither positive nor negative.
Briefing:• ₉₅ Am²⁴3 -----> ₅₃I¹³⁴ + ₄₂Mo¹⁰⁷ + 3 ₀n¹
• From the above reaction, three neutrons are produced.
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Fill in the missing curved arrows to show the preparation of this product from the hydrochlorination of a conjugated diene.
Then in part two select the common elementary steps.
missing curved arrows to show the preparation of this product from the hydrochlorination of a conjugated diene. Then in part two select the common elementary steps.
Two double bonds and a single bond are what distinguish conjugated diene. Conjugated diene, notably butadiene, play a crucial role in the creation of rubber and, consequently, in the creation of the tires on our automobiles. hydrochlorination In order to chlorinate an unsaturated hydrocarbon, hydrogen chloride must be added across its numerous bonds. Alkyne (triple-bonded) reactants are the focus of Johnson Matthey's DAVYTM hydrochlorination technology. A chlorinated alkene results from this exothermic reaction.
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g which cofactor participates directly in most of the oxidation-reduction reactions in the fermentation of glucose to lactate?
NAD+/NADH is the cofactor that participates directly in most of the oxidation-reduction reactions in the fermentation of glucose.
A chemical reaction is a method wherein one or more materials, also called reactants, are transformed into at least one or more special substances, called merchandise. Materials are both chemical elements or compounds.
A few synthesis reactions can result in more than one product. Photosynthesis is one of the maximum important chemical reactions on earth.
Chemical compounds are made from atoms of different elements, joined collectively through chemical bonds. A chemical synthesis normally involves the breaking of existing bonds and the formation of recent ones.
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brainly a mixture of two gases with a total pressure of 5.60 atm contains 0.40 atm of gas a. what is the partial pressure of gas b?
The partial pressure of gas B is 5.2 atm.
What do you understand by partial pressure?
When more than one gas is present in a container, each gas exerts pressure, which is known as partial pressure. Its partial pressure refers to the pressure of any gas inside the container.
Let there be n different gases in the mixture, each at a different pressure (P1, P2, etc.)
Then the total pressure will be:
[tex]P_{total}[/tex] = ∑[tex]P_{1}[/tex] + [tex]P_{2}[/tex] + [tex]P_{3}[/tex]
Now, partial pressure of mixture of gas containing gas A = [tex]P_{A}[/tex]
partial pressure of mixture of gas containing gas B = [tex]P_{B}[/tex]
Total pressure of gas = 5.60 atm
Pressure of gas [tex]P_{A}[/tex] = 0.40 atm
[tex]P_{total}[/tex] = [tex]P_{A}[/tex] + [tex]P_{B}[/tex]
5.60 atm = 0.40 atm + [tex]P_{B}[/tex]
[tex]P_{B}[/tex] = 5.60 - 0.40 = 5.2 atm
So, the partial pressure of gas B is 5.2 atm.
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draw both enolates formed when the ketone is treated with base. include charges. draw the oxyanion species; do not draw carbanion resonance forms. the starting material is a carbonyl bonded to a methyl and an ethyl group. this forms enolate 1 and enolate 2.
This is an illustration of asymmetric ketone deprotonation. Here, there are two potential outcomes.
What is Thermodynamic Product?
Thermodynamic product is a term used in thermodynamics to refer to the end product of a thermodynamic process. It is the state of the system at the end of the process, which has been changed from its initial state by the application of energy. The thermodynamic product is usually a combination of heat and work, which is released by the system in the form of energy. The thermodynamic product is also known as the final state of the system, which is determined by the total of the energy and mass that enter or leave the system during the process. It is also important to understand that thermodynamic products are not necessarily the desired end result of a process, and that the thermodynamic process can produce a variety of different outcomes depending on the nature of the process.
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16.3 l n2 at 25 °c and 125 kpa and 43.1 l o2 at 25 °c and 125 kpa were transferred to a tank with a volume of 5.25 l. what is the total pressure at 43 °c?
Its pressure distribution (in kpa) for 65 °C is P=13.32atm after 18.7 l n2 with 41. 9 l o2 and 25 °C and 125 kpa was transported to a container with such a capacity of 7. 00 l.
What is pressure and its types?A physical force applied to an object is known to as pressure. For unit area, a perpendicular force is delivered to a surface of the objects. T r is the fundamental formula for pressure. Phases of project are a unit of pressure (Pa). Absolute, ambient, differential, and gauge pressures are different types of pressure.
Briefing:That number of molecules of N2 is now determined
P₁.V₁=n₁.R.T₁
1.233×16.3=n₁×0.0821×298
n₁=0.822 mol
In a similar manner, we determine the quantity of O2 moles.
P₂.V₂=n₂.R.T₂
1.233×32.3=n₁×0.0821×298
n₂=1.628mol
The total number of moles of gas that must be pumped into the vessel with the dimensions of V = 4.50 L and T = 298 K equals
n=n₁+n₂
=0.822+1.628mol
=2.45mol
Let P represent the gas's final pressure,
PV=nRT
P×4.50=2.45×0.0821×298
P=13.32atm
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a is an instrument used to measure atmospheric pressure specifically in the area of meteorology.
The instrument used to measure atmospheric pressure specifically in the area of meteorology is Barometer.
A barometer is a scientific instrument used to measure atmospheric pressure, also called barometric pressure. The atmosphere is the layers of air wrapped around Earth. That air has a weight and presses against everything it touches as gravity pulls it to Earth. Barometers measure this pressure. Atmospheric pressure is an indicator of weather. Changes in the atmosphere, including changes in air pressure, affect the weather. Meteorologists use barometers to predict short-term changes in the weather. A barometer measures atmospheric pressure in units of measurement called atmospheres or bars. An atmosphere (atm) is a unit of measurement equal to the average air pressure at sea level at a temperature of 15 degrees Celsius (59 degrees Fahrenheit).
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4.0 mol Na2S can form 4.0 mol Na2SO4
and 5.0 mol CuSO4 can form
5.0 mol Na2SO4. How many moles of
Na2SO4 can form?
[?] mol Na₂SO4
Round your answer to the tenths place.
Answer:
9.0 mol Na2SO4
Explanation:
Answer: 4
Explanation:
10 g of methane (ch4) is combusted in a calorimeter that has an empty heat capacity of 18 j/°c. the calorimeter contained 150 g of water. if the temperature changed from 25.2 °c to 30.3 °c, calculate the molar heat of combustion of methane in j/mol.
The molar heat of the combustion of methane in j/mol is 5267.52 J/mol.
Given,
m = 10 g of CH₄
mol = mass/MW = 10/16 = 0.625 mol
C = 18 J/C
m = 150 g o water
dT = 30.3 - 25.5 = 4.8°C
Calculate molar combustion of methane,
calculate heat,
Q(empty) = C × dT = 18* (30.3-25.2) = 91.8 J
Q(water) = m × Cp(dT) = 150*4.184*(30.3-25.2) = 3200.76 J
Total q= 91.8 +3200.76 = 3292.2 J
This is done for 10 g of methane
Therefore,
If n = 0.625 present
Then,
H(rxn) = Q/n = 3292.2 / 0.625 = 5267.52 J/mol
Hence, the molar heat of the combustion of methane in j/mol is 5267.52 J/mol.
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N2 (g) effuses at a rate that is _________ times that of xe(g) under the same conditions.
There will be variances between isotopes, however by ignoring these and using the avg mol wt of N2 = 28 and Xe = 132; Rate(N2)/Rate(Xe) = sqrt (132/28) = 2.17
What an isotope is instead ?Isotopes are atoms with the same quantity of protons but differing numbers of neutrons. They differ in mass, which affects their physical characteristics even if they have nearly identical chemical makeup.
What makes anything an isotope?There are three known one-proton nuclei that have 0 neutrons, 1 neutrons, and 2 neutrons, respectfully. They are known as hydrogen isotopes (first from Greek isos, which means "same," and topos, which means "place") since they all occupy the same location in the periodic chart that is designated for atomic number 1.
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Draw a structural formula of an alkene or alkenes (if more than one) that undergo acid-catalyzed hydration and without rearrangement give 1- methylcyclobutanol as the MAJOR product. • You do not have to consider stereochemistry. • You do not have to explicitly draw H atoms. • If more than one structure fits the description, draw them all. • Draw one structure per sketcher. Add additional sketchers using the drop-down menu in the bottom right corner. • Separate structures with + signs from the drop-down menu.
The structure of 1-methyl cyclohexanol is: shown in Fig 1
The reactions for the preparation of 1-methyl cyclohexanol are summarised as: Fig 2
Here In Fig 2, 1-methyl cyclohexene reacts to give 1-methyl cyclohexanol in the presence of water. It proceeds through acid catalysed hydration.
In the Fig 3 reaction, methylene cyclohexane reacts with water to give 1-methyl cyclohexanol. It proceeds through acid catalysed hydration.
Thus, the possible structures of alkene are depicted as: Fig 4
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list the addition reactions of alkenes and alkynes. what similarities do you see in the addition reactions? do you notice any differences?
The list the addition reactions of alkenes and alkynes are as follows:
Addition Reactions of Alkenes:
1. Halogenation: Alkenes react with halogens to form halohydrins.
2. Hydration: Alkenes react with water to form alcohols in the presence of an acid catalyst.
3. Hydrohalogenation: Alkenes react with hydrogen halides to form alkyl halides.
4. Hydrogenation: Alkenes react with hydrogen in the presence of a metal catalyst to form alkanes.
5. Hydroboration-Oxidation: Alkenes react with borane to form alcohols.
Addition Reactions of Alkynes:
1. Halogenation: Alkynes react with halogens to form dihalides.
2. Hydration: Alkynes react with water to form ketones in the presence of an acid catalyst.
3. Hydrohalogenation: Alkynes react with hydrogen halides to form alkyl halides.
4. Hydrogenation: Alkynes react with hydrogen in the presence of a metal catalyst to form alkanes.
5. Hydroboration-Oxidation: Alkynes react with borane to form aldehydes.
Similarities: Both alkenes and alkynes undergo the same types of addition reactions.
Differences: The products of the addition reactions are different depending on the type of compound being reacted. For example, alkenes form alcohols when reacted with water, while alkynes form ketones.
What do you mean by Alkynes?
Alkynes are a group of hydrocarbons that contain at least one triple bond between two carbon atoms. They are also known as acetylenes and are unsaturated hydrocarbons with the general chemical formula of CnH2n-2.
What do you mean by Alkenes?
Alkenes are a class of hydrocarbons characterized by a carbon–carbon double bond. They are typically colorless, flammable, gases or liquids with a sweet odor. Alkenes are a major component of gasoline and are used in the manufacture of plastics and other industrial materials.
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a compound contains 39.37% chromium, 38.10% oxygen, and potassium. what percentage of the compound is potassium
The percentage of the compound is potassium is 22.53 %.
given that :
compound contains percentage of chromium = 39.37 %
compound contains percentage of oxygen = 38.10 &
compound contains percentage of potassium = ?
compound contains percentage of potassium = - 100%
(percentage of chromium + percent of oxygen )
= 100 % - (39.37 % + 38.10 %)
= 100 % - 77.47 %
= 22.53 %
The percent of potassium in total percent of compound is 22.5 %.
Thus, a compound contains 39.37% chromium, 38.10% oxygen, and potassium. percentage of the compound is potassium is 22.53 %.
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apollo spas services 297 hot tubs. if each hot tub needs 115 ml of muriatic acid, how many liters of acid are needed for all of the hot tubs?
The number of liters of acid needed for all of the hot tubs is the total volume of muriatic acid, which is 31, 155 ml.
Volume refers to the space occupied within the boundaries of an object in three-dimensional space. It is also called as the capacity of the object. In an object is filled with a liquid complete, there volume is the same.
In the given case that total volume of the acid would be the product of volume of each hot tub and number of hot tub containers. Hence, it is given by:
Total volume = Volume of each hot tub x number of hot tub containers
According to the given data:
Volume of each hot tub = 115 ml
Number of hot tub containers = 297
Hence,
Total volume = 115 x 297 = 31, 155 ml
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If 60 g of a radioactive substance naturally decays to 15 g after 16 hours, what is the half-life of the radioisotope?.
A radioactive source's half-life is 8 hours if 60 g of it drops voluntarily to 15 g in 16 hours.
What are radioisotopes, and how are their radioactivity levels determined?
The number of protons in the atomic nuclei of the constituent atoms of a given chemical is constant, whereas the number of neutrons changes. Radioisotopes are the name for an element's radioactive constituents. They can also be referred to as unstable neutron-proton pairings or atoms with too much electrical energy in their nucleus. The Contributes to the continuing (Bq), the international unit, or the Cobalt (Ci), the official machine in the United States, are used to report actual radiation levels.
Complete life divided by half.
Half-life equals 16/2
8 hours is the half-life.
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what is the percent yield of hcl if 42.0 g of hcl are produced from the reaction of 62.0 g of pcl3? use percent yield equals startfraction actual yield over theoretical yield endfraction times 100.. 28.4% 72.8% 85.0% 93.5%
The percent yield of HCl is 85.0%.
In chemistry, yield, also referred to as reaction yield, is a measure of the quantity of moles of a product formed in relation to the reactant consumed, obtained in a chemical reaction, usually expressed as a percentage.
%yield = (actual yield/theoretical yield) x 100
The presence of impurities lowers the actual yield, which lowers the percentage yield. The purity of the reactants influences the percentage yield. Highly pure reactants tend to increase actual yield and, as a result, percentage yield.
A percentage yield greater than 100 percent is only possible if the product is contaminated with impurities or if all of the solvent from the reaction mixture has not been dried off.
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