An atom can become a positive or negative ion depending on the number of electrons it possesses.
An atom can become a positive ion when it loses electrons, and a negative ion when it gains electrons. This is because all atoms have an equal number of protons, which carry a positive charge, and electrons, which carry a negative charge.
When the number of electrons compared to protons is changed, the atom can either become positively charged or negatively charged. For example, if an atom with six protons loses one electron, it will have five electrons and six protons, resulting in a net positive charge.
Alternatively, if the atom gains an electron, it will have seven electrons and still six protons, resulting in a net negative charge.
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who said electrons travel in paths called energy levels
The scientist who proposed that electrons travel in paths called energy levels was Niels Bohr.
In 1913, Bohr introduced the idea of a quantized electron energy in his model of the hydrogen atom. He suggested that electrons occupy specific, discrete energy levels around the nucleus, and that they can jump between these levels by absorbing or emitting energy. The energy levels are sometimes referred to as electron shells, and the further an electron is from the nucleus, the higher its energy level. This model helped to explain the spectral lines observed in hydrogen emission spectra and became a key concept in the development of quantum mechanics. The Bohr model was later refined by subsequent research and theories, but his insight and discovery still play a key role in our understanding of atomic structure.
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Which equation represents the second ionization energy of magnesium? Choose one: a) Mg+ (g) + e - â Mg(g) b) Mg +(g) â Mg2+ (3) +e- c) Mg(g) â Mg+ (g) + e- d) Mg(g) â Mg2+ + 2e- e) Mg(g) + e- â Mg- (g) e) Mg2+ (g) + 2e- â Mg(g)
Option b , represents the second ionization energy of magnesium.
What is ionization energy?Ionization energy is often measured in electronvolts (eV) or joules in physics (J). The energy required to ionise a mole of atoms or molecules is given in chemistry as kilojoules per mole (kJ/mol) or kilocalories per mole (kcal/mol), respectively.
Two periodic trends that adhere to the laws of Coulombic attraction are revealed by comparing the ionisation energy of atoms in the periodic table. In a given time, ionisation energy typically increases from left to right (that is, row). In a particular group, ionisation energy typically decreases from top to bottom (that is, column).
The latter pattern is caused by the outer electron shell moving away from the nucleus more and farther, with an additional inner electron shell being added every row as one proceeds down the column.
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In what energy band will JWST take observations?
Group of answer choices
Infrared
Radio
Ultraviolet
X-ray
The James Webb Space Telescope (JWST) is designed to take observations in the infrared part of the electromagnetic spectrum.
What is energy band?In physics, an energy band is a range of allowed energies that electrons in a solid material can have. In a solid material, the electrons are confined to specific energy levels, which depend on the properties of the atoms and the arrangement of the atoms in the crystal lattice. These energy levels are often referred to as "bands," because they form continuous bands of allowed energies rather than discrete energy levels. The most important energy bands in solid materials are the valence band and the conduction band. The valence band is the range of energy levels that the electrons occupy when the material is in its ground state, while the conduction band is the range of energy levels that the electrons can occupy when they are excited to a higher energy state. In an insulator, there is a large energy gap between the valence band and the conduction band, so it is difficult for electrons to move from the valence band to the conduction band and conduct electricity. In a conductor, there is only a small energy gap between the valence band and the conduction band, so electrons can move freely from the valence band to the conduction band and conduct electricity. In a semiconductor, the energy gap is intermediate, so the conductivity can be controlled by doping or applying a voltage.
Here,
Specifically, it will operate in the wavelength range of 0.6 to 28.5 micrometers, which is longer than the visible light range that the Hubble Space Telescope observes. The infrared band is particularly useful for studying the formation of galaxies and stars, the evolution of the universe, and the properties of exoplanets, among other things.
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Why does methanol have a low boiling point?
The methanol does have the low boiling point because of the very strong hydrogen bonds in the methanol.
The methanol has the low boiling point as it has the very strong hydrogen bonding. The Methanol is the alcohol , the Hydrogen bonds are present in the alcohol because of the hydrogen attached with the electronegative atom search of the oxygen. The molecular formula of the methanol is CH₃OH. The Hydrogen bonding occurs when the significant amount of the positive charge will building up on the hydrogen atom.
Thus, due to the hydrogen bonding the boiling point of the methanol is very low.
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What is the molality of a solution formed by dissolving 27. 8 g of lii in 500. 0 ml of water?.
The molality of the solution that is formed by dissolving 27. 8 g of lii in 500. 0 ml of water is 5.56 moles/kg.
Molality is defined as the number of moles of solute per kilogram of solvent. To calculate the molality of a solution, we first need to determine the number of moles of solute in the solution and then divide that number by the mass of the solvent. In this case, the solute is LiI (lithium iodide) and the solvent is water.
The number of moles of LiI can be calculated using its molar mass:
27.8 g of LiI = 27.8 g / (mol/g) = 1.39 moles.The mass of the water can be calculated using its density:
500.0 ml of water = 500.0 ml * (1 kg/1000 L) = 0.5 kg.The molality of the solution is then calculated as follows:
1.39 moles of LiI / 0.5 kg of water = 2.78 moles/kg = 5.56 moles/kg (rounded to 2 decimal places).Learn more about Molality:
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What is a skeleton equation give example?
Nuclear power plants produce no _________________________________________ but they do generate ____________________________________________________.
Answer:
Green house gas emissions but do generate heat to produce steamsince power plans don't burn fuel, they don't produce greenhouse
Explanation:
Nuclear power plants produce no greenhouse gas emissions but they do generate electricity.
What are Nuclear power plants ?Nuclear power plants are a type of power generation facility that harnesses the energy from nuclear reactions to produce electricity.
Unlike fossil fuel power plants, which burn coal, oil, or natural gas and release greenhouse gases into the atmosphere, nuclear power plants do not emit any greenhouse gases during their operation.
This is because nuclear power plants rely on nuclear fission, a process where the nucleus of an atom is split, to generate heat.
The heat is then used to produce steam, which drives turbines connected to generators, ultimately generating electricity.
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based on your knowledge of intra- and intermolecular forces, choose the answer with the compounds listed in order of increasing boiling point.A) SbCI5 < BrF5< NH3< MgBr2B) MgBr2 < NH3 < BrF5 < SbCI5C) BrF5 < SbCI5 < MgBr2 < NH3D) MgBr2 < BrF5 < SbCI5 < NH3
The answer is (D) MgBr2 < BrF5 < SbCI5 < NH3 with the compounds listed in order of increasing boiling point
D) MgBr2 < BrF5 < SbCI5 < NH3
This ordering is consistent with the strengths of intermolecular forces in each compound. MgBr2 has the highest boiling point due to its strong ionic bonds, followed by BrF5 with its strong dipole-dipole interactions. SbCI5 has weaker dipole-dipole interactions than BrF5, so it has a lower boiling point. NH3 has the weakest intermolecular forces of all the compounds listed, so it has the lowest boiling point.
The boiling point of a compound is primarily determined by the strength of its intermolecular forces. Compounds with stronger intermolecular forces will have higher boiling points, while compounds with weaker intermolecular forces will have lower boiling points.
Therefore, the correct answer is (D) MgBr2 < BrF5 < SbCI5 < NH3.
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What is the signal observed at ppm carbon nmr residual?
In carbon nuclear magnetic resonance (NMR) spectroscopy, the signal observed at 0 ppm corresponds to the chemical shift of the carbon atom in tetramethylsilane (TMS) used as a reference standard.
Parts per million (ppm) of the NMR spectrometer frequency are used to describe the chemical shifts of additional carbon atoms in a sample relative to the TMS signal. The electron density around the carbon atom, the hybridization of the carbon atom, and the makeup of the nearby atoms or functional groups are only a few of the variables that have an impact on chemical changes. As a result, the chemical shift of a particular carbon atom can provide details about the surroundings and structure of the molecule it is a part of.
The "residual peak" or "residual solvent peak" is another name for the signal seen in carbon NMR spectroscopy at 0 ppm.
Any leftover solvent molecules in the NMR sample might cause a signal to appear.
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What is the name of the compound feO?
The name of the compound feO is Iron(II) oxide
A byproduct of the removal of sulfides from gases using iron oxide. In this procedure, gases are passed over a mixture of wood shavings and iron(III) oxide. spontaneous heating is a possibility. This heat could ignite something. easily started by sparks or heat coming from outside. used in electric furnace steel operations as well as for precipitating copper or lead from solutions of their salts.
FeO can be prepared by the thermal decomposition of iron(II) oxalate.
[tex]FeC_{2} O_{4}[/tex] → FeO + [tex]CO_{2}[/tex]+ CO
The procedure is conducted under an inert atmosphere to avoid the formation of iron(III) oxide [tex](Fe_{2} O_{3} ).[/tex] A similar procedure can also be used for the synthesis of manganous oxide and stannous oxide.
Stoichiometric FeO can be prepared by heating Fe0.95O with metallic iron at 770 °C and 36 kbar
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the amount of energy required to remove an electron from an isolated atom or molecule. True or False
Answer: True
Explanation: The amount of energy required to remove an electron from an isolated atom or molecule is the ionization potential. There is an ionization energy for each successive electron removed.
Hope this helps you!
A rigid container holds 22. 4 l of an ideal gas at stp. How many moles of gas need to be added to the container to make the pressure equal to 325 kpa?.
Avogadro's law states that 2.2075 moles must be added to the container in order to raise the pressure to 325 kPa.
What is meant by Avogadro's law?The general number of atoms or molecules has a direct relationship to the volume occupied by a gas under constant temperature and pressure, according to Avogadro's law, a gas law.
Given that it links temperature, pressure, volume, and substance amount, it is closely related to the ideal gas equation.
V ∝ n,
The straight line graph of volume versus moles is a straight line passing through the origin which implies that zero moles of gas occupy zero volume.
As 1 atm = 101.325 kPa
325 kPa = 325/101.325 = 3.2075 atm, as at STP 1 atm =22.4 liter.
Applying Avogadro's law,
n₂ = 71.848 × 1/22.4 = 3.2075 moles .
To estimate moles to be added, we get
3.2075 - 1 = 2.2075 moles.
Therefore, to increase the pressure in the container to 325 kPa, 2.2075 moles of gas must be supplied.
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according to the information in the graphs and the table how was species diversity in the aquatic ecosystems affected by the increased water temperature
Species diversity in aquatic ecosystems is significantly affected by the increased water temperature. This is because warm water holds less dissolved oxygen than cool water, and may not contain enough dissolved oxygen for the survival of different species of aquatic life.
What is an ecosystem?An ecosystem may be defined as a type of place or an area where members of different species live together and interact with one another for the purpose of food, shelter, space, mating partner, and other resources.
The solubility of oxygen and other gases will decrease as temperature increases. This means that colder lakes and streams can hold more dissolved oxygen than warmer waters. If water is too warm, it will not hold enough oxygen for aquatic organisms to survive.
Some compounds are also more toxic to aquatic life at higher temperatures. So, warm stream water is can affect the aquatic life in the stream.
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based on your knowledge of intra- and intermolecular forces, choose the answer with the compounds listed in order of increasing boiling point.
a. SbCl2 < Brf5 < Nh3 < Mgbr2
b. Mgbr2 < Nh3 < Brf5 < SbCl2
c. Brf5 < SbCl2 < Mgbr2 < Nh3
d. Mgbr2 < Brf5 < SbCl2 < Nh3
The order of increasing boiling point be Mgbr2 < Brf5 < SbCl2 < Nh3.
What is meant by intra- and intermolecular forces?Atoms within a molecule are held together by intramolecular forces. There are forces between molecules known as intermolecular forces. Between nearby particles, there are forces of attraction or repulsion known as intermolecular forces (atoms, molecules, or ions).
It can be helpful to distinguish between intramolecular and intermolecular processes. While two or more reaction sites within the same molecule are engaged in intramolecular reactions, covalency changes occur in two distinct molecules during intermolecular reactions.
Atoms are held together to form molecules by intramolecular forces. Molecules are held together by intermolecular interactions to create solids and liquids.
Intramolecular bonds are the covalent connections that hold the hydrogen and oxygen atoms of a water molecule together.
Therefore, the correct answer is option d. Mgbr2 < Brf5 < SbCl2 < Nh3
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rank these four conformations of 2-methylbutane in order from lowest to highest energy.
The rank of these four conformations in order of lowest to highest energy is:
1.Syn
2.Gauche
3.Gauche-gauche
4.Anti
The conformations of 2-methylbutane can be ranked in order of energy by comparing the energies of different arrangements of its atoms. The energy of a conformation is determined by the strength of the intermolecular forces between its atoms and the bond angles and distances between them. The following are the four conformations of 2-methylbutane Anti, Gauche, Gauche-gauche and Syn
Of these four conformations, the syn conformation has the lowest energy because the methyl group and the hydrogen atom are on the same side of the molecule, which reduces the steric strain between them. The gauche conformation has a slightly higher energy because the methyl group and the hydrogen atom are on opposite sides of the molecule, increasing the steric strain. The gauche-gauche conformation has an even higher energy because the strain is further increased by the presence of two gauche conformations.
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What element is in period 4 and has 5 neutrons in its most common isotope?
The neutrons are sub atomic particles. The particles which are smaller in size than an atom is known as sub atomic particles. The isotope of beryllium with mass number 9, i.e., ⁹Be has 5 neutrons.
What is isotope?The isotopes are defined as the chemical elements which have the same atomic numbers but different mass numbers. In isotopes, the number of neutrons differ from the number of protons. The physical properties of the elements are different.
'Be' has 3 isotopes, they are ⁷Be, ⁹Be and ¹⁰Be. Among these isotopes, ⁹Be is found to have 5 neutrons and 4 protons or electrons.
Thus ⁹Be is the most common isotope with 5 neutrons.
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What is symbol of microliter ?
The symbol of microliter is μL. It is defined as a unit of volume in the metric system.
Microliter is defined as a unit of volume in the Metric System. The symbol for microliter is μL. The base unit for this is liter and the prefix is micro. The prefix micro is derived from the Greek "mikrós" meaning small and it is symbolized as μ. It denotes a factor of one millionth (10-6) which means that there are 1,000,000 microliters in a liter. The symbol of microliter is μL.
1 μL = [tex]10^{-3}[/tex] μL.
It is a small volume and that is measurable in a typical laboratory. The use of microliter volumes would be in preparation of an electrophoresis sample when isolating DNA or during chemical purification. This is measured and dispensed using micropipettes.
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What is CS2 called in chemistry?
The compound CS₂ is called carbon disulfide in chemistry.
With the chemical formula CS₂ and the structural formula S=C=S, carbon disulfide (commonly known as carbon disulfide) is a significant inorganic molecule in chemistry. It is a white liquid that serves as a component in the synthesis of organic compounds.
Several industries utilise carbon disulfide. Many compound like Rubber, viscose rayon, cellophane are made up of it.
The group of inorganic substances known as other non-metal sulfides includes CS₂. These are inorganic compounds with a sulfur atom in an oxidation state of 2, where the most massive atom linked to the oxygen is a member of the other non-metals group.
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Which pair of substances could be used to illustrate the law of multiple proportions?
A) SO2, H2SO4
B) CH4, C6H12O6
C) CO, CO2
D) NaCl, KCl
E) H2O, O2
The law on multiple proportions is shown with the chemical pair CO and CO2.
What makes SO3 or SO3 2 different from one another?Three double bonds and also no lone pairs at the sulphur are present in SO3. That is altered by adding two extra electrons, which add two more electrons to sulphur. Sulfate trioxide is known as SO3, and SO3-2 is known as the sulfite ion.
Is there a multiple proportionality law for CO and CO2?Similar elements can combine to form compounds, such as carbon dioxide and carbon monoxide (CO) (CO2). Both compounds are composed of carbon (C) and oxygen (O) atoms, but their carbon to oxygen ratios are different. This serves as an example of the multiple proportions law.
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What is ferrous sulfate?
Ferrous sulfate is just one of many forms of the metallic element iron. FeSO4
In its natural state, the solid mineral resembles small crystals. The crystals are usually yellow, brown, or blue-green, which is why ferrous sulfate is sometimes called green vitriol (1).
Supplement manufacturers use several types of iron in their supplements. In addition to ferrous sulfate, the most common are ferrous gluconate, ferrous citrate, and ferrous sulfate.
Most iron in dietary supplements comes in two forms, ferric or ferrous. It depends on the chemical state of the iron atoms.
The body absorbs iron forms better than iron forms. Therefore, health care providers often consider iron-rich forms, including ferrous sulfate, to be the best choice for iron supplementation
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What amino acid performs the nucleophilic attack during the chymotrypsin mechanism?(a) Lys(b) Cys(c) Thr(d)Ser(e)His.
Option d is the correct answer to this question. The amino acid Ser performs the nucleophilic attack during the chymotrypsin mechanism.
An amino acid involved in the production of proteins is ser or serine. It is a polar amino acid because it has a -amino group, a carboxyl group, and a side chain made up of a hydroxymethyl group.
Serine is essential for the synthesis of muscle tissue, proteins, and enzymes in the body. For the correct metabolism of lipids and fatty acids, serine is required. Moreover, it aids in the creation of antibodies. Several cosmetics and skin care products use serin as a natural moisturizing agent.
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Is organic chemistry as a second language helpful?
Yes, Organic Chemistry as a Second Language can be extremely helpful for students who are struggling with the concepts of organic chemistry. This book breaks down the complex principles of organic chemistry into simple, easy-to-understand explanations, which can be especially helpful for students who may have trouble with the more technical language often used in organic chemistry textbooks.
Additionally, the book includes numerous practice problems and step-by-step explanations, which can help students gain a better understanding of the material and improve their problem-solving skills. Overall, Organic Chemistry as a Second Language can be an invaluable resource for students looking to improve their understanding of organic chemistry.
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Element X has two isotopes. The first isotope has a natural abundance of
70% and has a mass of 50 amu. The second isotope has a natural
abundance of 30% and has a mass of 54 amu. Is the average mass
going to be closer to 50 or 54 amu and why?
The average atomic mass is calculated on the basis of the average mass of all the isotopes present in the nature. Here the average mass is closer to 50 amu.
What is isotope?The isotopes are defined as the chemical elements which have the same atomic numbers but different mass numbers. The number of protons or electrons in them are same but the number of neutrons will be different.
₅₀X = 70% = 0.70
₅₄X = 30% = 0.30
Average atomic mass = (50 × 0.70) + (54 × 0.30) = 51.2
Thus the average atomic mass is closer to the first isotope of mass 50 amu. Because of the higher percent abundance of this isotope.
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Classify each solid as a covalent, ionic, metallic, or molecularsolid.sodium sulfide, pure sodium, frozen carbon dioxide, diamond.
The classification of solid are :
Sodium sulfide - ionic solid
Pure sodium - metallic solid
Frozen carbon dioxide - molecular solid
Diamond - covalent solid
The sodium sulfide that is Na₂S is the compound formed by the ionic bonding. The sodium sulfide is classified as the ionic solid. The pure sodium exhibits the metallic bonding and comes under the metallic solid. The frozen carbon dioxide also called as the dry ice is the molecular solid.
The diamond is the network of the covalent bonding. Therefore the diamonds comes under the category of the covalent solid. The covalent bonds are formed between the atoms by the sharing of the electrons.
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when silver carbonate dissolves in water, what ions are produced?
When the silver carbonate dissolves in the water, the ions are produced are Ag⁺ and CO₃²⁻.
The chemical compound ,silver carbonate with the chemical formula that is Ag₂CO₃ is very poorly soluble in the water. The color of the compound silver carbonate is yellow color. It is the transition metal carbonate that is the reason it will not dissolve properly in the water. The very small amount of the silver carbonate is soluble in the water. The silver carbonate is sparingly dissolves in the water.
Thus, Ag⁺ and CO₃²⁻ ion are are produce if we dissolve the solid silver carbonate in to the water.
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Question:
What is the molar mass of KMnO4?
Molar Mass:
Molar mass is the number of grams of a substance that equals one mole or 6.02x1023 molecules, also known as Avogadro's number. Molar mass can be used to convert between moles and grams, denoted by g/mol.
The molar mass of a Potassium permanganate molecule, KMnO₄ is equals to the 158.04 g/mol.
We have a Potassium permanganate molecule, KMnO₄. It consists one atom of potassium, one atom of Manganese and four atoms of oxygen. The mass of one mole of a substance is called its molar mass. Molar mass of a molecule is calculated by the addition of the masses of the individual atoms within the their quantities present in a molecule. So, the molecular mass of KMnO₄, is sum of individual masses of hydrogen, nitrogen and chlorine atoms with number of their atoms. The atomic mass of potassium atom, K
= 39.10 g/mol
The atomic mass of oxygen atom, O = 16 g/mol
The atomic mass of Manganese atom, Mn
= 54.94 g/mol
Now, Molar mass of KMnO₄ = 1× atomic mass of potassium + 1×atomic mass of Manganese + 4× atomic mass of oxygen atom
= 1×K + 1×Mn+ 4×O
= 1×39.10 g/mol + 1×54.94g/mol + 4×16 g/mol
= 39.10 g/mol + 54.94 g/mol + 64 g/mol
= 158.04 g/mol
Hence, the molecular mass of KMnO₄ is 158.04 g/mol.
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why genshin impact the gourmet supremos the importance of eating well?
Players have to first entire the Gourmet Supremos: Breakthrough Thinking every day fee quest first earlier than The Importance Of Eating Well will display up as available.
As quickly as you have finished Breakthrough Thinking, Parvaneh will display up in Inazuma City. She may be discovered close to Inazuma's Adventurers' Guild. The Gourmet Supremos is a sequence of World Quests and Commissions in Inazuma and Sumeru. It revolves across the titular Gourmet Supremos, a collection of 3 human beings from round Teyvat with an hobby in nearby cuisines. For the cutting-edge first-rate revival meals in Genshin Impact, not anything can beat the Crab, Ham & Veggie Bake (forget about the lacking Oxford comma). It's additionally referred to as the Baked Vegetable Pie. This cute morsel revives any downed man or woman and heals them.
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what protic solvent for sn1 master organic chemistry?
Some common protic solvents used in SN1 reactions include water, alcohols, and carboxylic acids.
In organic chemistry, SN1 reactions are a type of substitution reaction that occurs in a protic solvent.
A protic solvent is a solvent that has a hydrogen atom bonded to an electronegative atom, such as oxygen or nitrogen. This allows the solvent to form hydrogen bonds with the reactants and stabilize the transition state of the reaction.
These solvents are able to stabilize the carbocation intermediate that is formed during the reaction, which helps to increase the reaction rate.
It is important to note that the choice of solvent can have a significant impact on the rate and outcome of the reaction. For example, a polar protic solvent like water will favor the SN1 reaction, while a polar aprotic solvent like acetone will favor the SN2 reaction.
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is agno3 soluble in water
AgNO₃ is soluble in water .
Strong ionic bonds combine to generate a silver nitrate molecule. It indicates that the compound's two constituents, silver and nitrate, retain opposing charges and are drawn to one another.
Thus, nitrate is negatively charged whereas silver is positively charged. Because it possesses an additional ion, silver acquires a positive charge during the production of silver nitrate. In contrast, nitrate loses an ion.
Consequently, their charges are combined and balanced. Yet, the silver and nitrate separate when submerged in water. This explains why silver nitrate dissolves in water.
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who said energy levels are located certain distances from the nucleusA. DaltonB. ThomsonC.RutherfordD. Bohr
The correct answer is (D) Bohr. In 1913, Niels Bohr proposed the Bohr model of the atom, which introduced the idea that electrons occupy certain energy levels are located at specific distances from the nucleus of the atom.
Niels Bohr proposed the Bohr model of the atom, which introduced the idea that electrons occupy certain energy levels, or shells, that are located at specific distances from the nucleus of the atom. He proposed that electrons can only exist in these specific energy levels, and that they can transition between levels by absorbing or emitting energy in the form of photons. The Bohr model of the atom was significant because it provided a theoretical explanation for the atomic spectra that were observed in experiments, and it represented a significant advancement in our understanding of the structure of the atom. However, it was later refined with the development of quantum mechanics, which provided a more accurate description of atomic structure.
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