A total of 4.46% of the experiment was off. For a single mole of gas at stp, an experimental volume = 21.4 l is found.
How do you define experimental molar volume?One mole of the a chemical element and chemical compound occupies one molar volume (Vm) at standard pressure and temperature (STP). The molarity (M) and mass density () can be divided to calculate it.
In an experiment, how do you quantify volume?The concept of volume is broad. With specialized glassware and measuring units commonly in milliliters (mL) or liters, the volume of the a liquid can be determined directly (L). This experiment will involve measuring liquid quantities with a beaker, 2 graduated cylinders, and a burette. The accuracy of these instruments will be compared.
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Arrange the different types of electromagnetic radiation by wavelength. Only include the items that are forms of electromagnetic radiation. longest wavelength shortest wavelength Answer Bank low frequency X-rays a high pitch sound wave high frequency X-rays red light gamma ray radiation infrared radiation Lowest frequency Highest frequency Answer Bank long-wavelength ultraviolet radiation a red photon an X-ray photon a blue photon short-wavelength ultraviolet radiation a water wave
The sunlight is a form of electromagnetic energy. The visible light is only a small portion of the electromagnetic spectrum. The electromagnetic spectrum consists of different range of frequencies.
What is electromagnetic spectrum?The electromagnetic spectrum consists of a large number of electromagnetic radiations which further consists of many subranges commonly referred to as portions. These can be again classified into infra-red radiation, visible light or ultraviolet radiation.
Each type of radiation has its own specific wavelength and frequency. The increasing order of wavelengths of electromagnetic radiation is given as:
Gamma rays < X rays < UV rays < Infrared rays < Microwaves < Radiowaves.
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Which of the following cannot form hydrogen bonds with water?
a. CH₃OCH₃
B. NA⁺
C. F⁻
D. HCOOH
The one from the following which cannot form the hydrogen bonds with the water is the Na⁺. The correct option is B.
The hydrogen bond is the interaction that involves the hydrogen atom that is present in between the pair of the other atoms having the high affinity for the electrons and such the bond is the weaker than the ionic bond or the covalent bond but this bond is stronger than van der Waals forces. The hydrogen bond is the type of an intermolecular force (IMF) that will forms the special type of the dipole - dipole attraction .
Thus, as there is no electronegative atom in the Na⁺, therefore, it cannot form the hydrogen bond with the water.
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58. What is the approximate molecular weight of active Dnmt3a?
A. 35 kDa
B. 70 kDa
C. 105 kDa
D. 140 kDa
Option B, A catalytic domain of 35 kDa and a SET domain of 35 kDa make up the approximately 70 kDa molecular weight of active Dnmt3a.
The molecular mass of active Dnmt3a is around 70 kDa. The addition of methyl groups to DNA molecules is carried out by the DNA methyltransferase enzyme Dnmt3a. The inhibition of transposable elements is another potential role for it.
A catalytic domain and a SET domain make up Dnmt3a's two separate domains. A molecular weight of approximately 35 kDa distinguishes the SET domain from the catalytic domain. This results in an overall molecular weight for active Dnmt3a of 70 kDa.
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2. the reactivity of an organic molecule is primarily dependent upon which components of the molecule?
The reactivity of the organic molecule is primarily dependent upon the attached functional group, such as a hydroxyl group.
The functional group causes the reaction to occur in case of carbon compounds, thus reactivity of an organic molecule is primarily dependent upon the presence of functional group.
Functional group is defined as a substituent or group of atoms or an atom which causes chemical reactions.Each functional group will react similarly regardless to the parent carbon chain to which it is attached.This helps in prediction of chemical reactions.
The reactivity of functional group can be enhanced by making modifications in the functional group .Atoms present in functional groups are linked to each other by means of covalent bonds.They are named along with organic compounds according to IUPAC nomenclature.
Functional group inter conversion is also possible by retro -synthesis.In some cases , functional groups can be charged molecules.Thus, the reactivity of an organic molecule is primarily dependent upon the presence of functional group.
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please answer thanks
Answer:
my answer us that filter is used to seperate solution or solid and liquid combination
what is the name for the compound NO2
The compound NO₂ is named nitrogen dioxide.
It is a covalent molecule composed of one nitrogen atom and two oxygen atoms that are double bonded to the nitrogen atom. Nitrogen dioxide is a reddish-brown gas with a sharp, pungent odor. It is an important air pollutant, often produced by combustion processes, and can have harmful effects on human health and the environment.
In addition to its role as a pollutant, nitrogen dioxide is also used in various industrial processes, such as the production of nitric acid and as a rocket propellant. The name "nitrogen dioxide" reflects the composition of the molecule and follows the rules of IUPAC nomenclature for covalent compounds.
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What kind of bond is MgO?
Magnesium oxide (MgO) is an ionic compound. It is composed of positively charged ions (Mg2+) and negatively charged oxide ions (O2-), held together by electrostatic attraction. This type of bond is known as an ionic bond.
Magnesium Oxide: Understanding the Ionic BondMagnesium oxide (MgO) is an ionic compound that is composed of magnesium and oxygen ions. The bond between these ions is known as an ionic bond, which is a type of chemical bond that is formed through the transfer of electrons between two atoms.
In the case of MgO, the magnesium atom loses two electrons to form a positively charged ion (Mg2+), while the oxygen atom gains these electrons to form a negatively charged ion (O2-). The resulting ions are then attracted to each other by electrostatic forces, which hold them together in a crystal lattice structure. This type of bond is characterized by its high melting point, brittleness, and ability to conduct electricity when dissolved in water or melted.
Understanding the ionic bond in magnesium oxide is important for understanding the properties of this compound and its use in various applications, such as in the manufacturing of refractory bricks, electrical insulation, and as a supplement in animal feed.
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Do solar-powered calculators work?
Yes, solar-powered calculators do work, and they are a popular alternative to battery-powered calculators.
Solar-powered calculators use photovoltaic cells to convert light energy from the sun or other light sources into electrical energy, which powers the calculator.
When light shines on the solar panel of the calculator, it produces a small electric current that powers the calculator. The amount of light required to power the calculator is very low, and even indoor lighting is usually enough to operate a solar-powered calculator.
Compared to battery-powered calculators, solar-powered calculators are more environmentally friendly since they don't require the use of disposable batteries, which can be harmful to the environment if not disposed of properly. Solar-powered calculators also have a longer lifespan than battery-powered calculators since they don't require replacement batteries.
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when an electron in an atom goes from a higher energy level to a lower energy level, the atom may
True or False
Answer:
i think true im not sure
Explanation:
What is the bond angle of a tetrahedral?
The bond angle of a tetrahedral molecule is approximately 109.5 degrees. This is because a tetrahedron is a three-dimensional shape with four equivalent sp3 hybridized orbitals forming the corners of the tetrahedron.
Understanding Tetrahedral Bond AnglesThe bond angle of a tetrahedral molecule is one of the most fundamental and important concepts in chemistry. A tetrahedron is a three-dimensional shape with four equivalent sp3 hybridized orbitals forming the corners of the tetrahedron. These hybridized orbitals result from the combination of the s and p orbitals of the central atom, creating four orbitals that are directed towards the four corners of the tetrahedron.
Each orbital can form a bond with an adjacent atom or molecule, resulting in four identical bonds in a tetrahedral molecule. The ideal bond angle between adjacent bonds in a tetrahedral molecule is 109.5 degrees, which is due to the geometric arrangement of the orbitals around the central atom. The four orbitals are arranged such that they are as far apart from each other as possible, resulting in an angle of 109.5 degrees between adjacent bonds.
Examples of tetrahedral molecules include methane (CH4), which has four identical C-H bonds arranged around the central carbon atom, and carbon tetrachloride (CCl4), which has four identical C-Cl bonds arranged around the central carbon atom. The understanding of tetrahedral bond angles is important in various fields of chemistry, including organic chemistry, biochemistry, and materials science, and it provides a basis for understanding the properties and behavior of many molecules.
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what is perchloric acid formula?
The formula for perchloric acid is HClO₄.
Perchloric acid is a strong mineral acid that contains a central chlorine atom bonded to four oxygen atoms and a hydrogen atom. It is a colorless and odorless liquid that is highly corrosive and reactive, making it a potent oxidizer.
Perchloric acid is commonly used in laboratory and industrial settings for its strong oxidizing properties and ability to dissolve a variety of metals and organic compounds. It must be handled with care due to its potential to form explosive salts with organic materials and other reducing agents.
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How many grams of na2o are requieres to produce 160 grams of NaOH? Show your work
Na2O+H2O->2NaOH
Water has a molar mass of 18 g/mol while sodium hydroxide has a molar mass of 40 g/mol. As a result, to make 80 g of sodium hydroxide, 18 g of water is needed. Hence, 36 grams of water are required to make 160 grams of NaOH.
What balanced equation describes the reaction between Na O2 and Na2O?Both Na and O are out of balance, thus the balanced equation using the hit-and-miss method is 4Na+O22Na2O.
Why is sodium oxide's chemical formula Na2O?Due to the molar mass of 61.98 g mol-1, the structure of Na2O is a little complex. The oxidization is composed of a single oxygen atom, which is bonded to two sodium atoms via a few ionic connections. The molecule's structure is similar to that of an antifluorite crystal, so the Na atoms coordinate 4 O2 atoms.
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What is dipole-dipole interaction example?
Some examples of a dipole–dipole interaction can be that interaction which is formed between polar molecules, such as hydrogen chloride (HCl), carboxylic acids (i.e., acetic acid), and amino acids.
Dipole–dipole interactions are defined as weak interactions which arises from the close association of permanent or induced dipoles. Collectively these forces are usually known as Van der Waals interactions. Generally, proteins contain a large number of these interactions, which vary considerably in strength.
Hydrogen chloride (HCl), hydrogen fluoride (HF), and water are all common examples of dipole-dipole forces. HCl (hydrogen chloride) is considered as a permanent dipole. Basically, the chlorine atom has a partially negative charge, while the hydrogen atom has a partially positive charge.
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where Kf is the freezing point depression constant and m is the molality of the solution. Which of the statements explains why molality is used instead of molarity in this equation? A. Molality does not appear in many equations, so it is used here to distinguish this equation from other similar ones. B. As the temperature of a solution changes, its volume will also change, which will affect its molarity but not its molality. C. In solutions, moles are not directly related to grams and the freezing point of a solution is dependent solely on the number of grams of solute. D. The equation was originally published with m as a typo, rather than M, but the values are close enough that the equation is still valid.
The statement that explains why molality is used rather of molarity in the freezing point depression equation is B. As the temperature of a result changes, its volume will also change, which will affect its molarity but not its molality.
Molality is defined as the number of intelligencers of solute per kilogram of detergent, whereas molarity is defined as the number of intelligencers of solute per liter of result. Since the volume of a result can change with temperature, the attention of a result measured in molarity can be affected by changes in volume. This can lead to inaccuracies in computations involving changes in temperature, similar as in the freezing point depression equation. In discrepancy, molality is a measure of attention that isn't affected by changes in volume because it's grounded on the mass of the detergent, which is assumed to remain constant indeed as the temperature changes. thus, molality is the more applicable attention unit to use in the freezing point depression equation, which is dependent on the attention of the solute and not on the volume of the result.
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Hydrogen peroxide decomposes into water and oxygen. The uncatalyzed reaction has activation energy of 86 kJ / mol. The Ea value in the presence of acetanilide is 112 kJ / mol and in the presence of Mn02 it is 49 kJ / mol. What conclusion can you draw from the above observations?
We may infer that MnO2 is a good catalyst for hydrogen peroxide breakdown because it reduces the activation energy needed for the process to occur. Acetanilide seems to stymie the process by rising the activation energy.
The activation energy (Ea.) is the minimum energy required for a chemical reaction to occur. A higher Ea value means that more energy is required to initiate the reaction, while a lower Ea value means that the reaction can occur more easily.
In this case, we have three different values of Ea for the decomposition of hydrogen peroxide:
Uncatalyzed reaction: Ea = 86 kJ/mol
Reaction in the presence of acetanilide: Ea = 112 kJ/mol
Reaction in the presence of MnO2: Ea = 49 kJ/mol
The presence of a catalyst can lower the activation energy required for a chemical reaction to occur. In this case, we see that the Ea value for the reaction in the presence of MnO2 is significantly lower than the Ea value for the uncatalyzed reaction and the reaction in the presence of acetanilide.
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The amount of pollution that is economically most desirable is determined by plotting two curves. The point where the two curves meet is termed the from an economic viewpoint
The point where the two curves meet is termed the "optimal level of pollution" from an economic viewpoint.
The two curves that are plotted are the marginal cost of pollution abatement and the marginal cost of pollution damage. The marginal cost of pollution abatement represents the cost of reducing pollution, while the marginal cost of pollution damage represents the cost of the harm caused by pollution.
At low levels of pollution, the marginal cost of pollution abatement is low because only small reductions in pollution are needed. At the same time, the marginal cost of pollution damage is also low because the harm caused by pollution is minimal. As pollution levels increase, the marginal cost of pollution abatement increases because greater effort and cost is required to reduce pollution. Similarly, the marginal cost of pollution damage also increases because the harm caused by pollution becomes more severe.
The optimal level of pollution is the point where the marginal cost of pollution abatement intersects with the marginal cost of pollution damage. This point represents the level of pollution where the cost of reducing pollution is equal to the cost of the harm caused by pollution. Any deviation from this optimal level would result in either too much pollution or too much abatement, which would lead to economic inefficiencies.
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Which method could you use to
encourage more product, H2, to form
from the reaction below?
CH 4 (g)+2H 2 S(g)
We need to add more of the CH4 or H2S
How do you drive the reaction to the right hand side?We know that the reaction as we can see has to do with the combination of the methane molecule and the hydrogen sulfide. In the case of the reaction that we have, we are looking at the way that we can use to push the reaction to the right so that we can have more H2 in the system.
If we add more of the CH4 to the system or we happen to add more of the H2S to the system then we are going to have more of the H2 formed as we know.
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Answer: Remove Cs2
Explanation: Acellus confirmed
how to find the number of neutrons
The number of neutrons in an atom can be found by subtracting the atomic number (number of protons) from the mass number (number of protons plus neutrons).
The mass number is typically found in the atomic symbol, which is written as follows: A X
Where A is the mass number (number of protons plus neutrons) and X is the chemical symbol of the element. The atomic number is usually written as a subscript to the left of the chemical symbol, as follows: A X Z
Where Z is the atomic number.
To find number of neutrons, simply subtract atomic number from the mass number:
Number of neutrons=Mass number-Atomic number
For example, the element carbon has an atomic number 6 and its mass number will be 12. To find the number of neutrons in a carbon atom, we subtract the atomic number from the mass number:
Number of neutrons= 12-6 = 6
Therefore, a carbon atom has 6 neutrons.
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:))))))))))))))))))))))))))
Answer:
Thermal Energy was transferred out of both Aquariums at the same rate
Answer:
Thermal energy was transformed at the same rate
Explanation:
:))))))))
explain why the h-n-h angle in ammonia is smaller than the h-n-h angle in the ammonium ion.
The H-N-H angle in ammonia is smaller than the H-N-H angle in the ammonium ion due to the repulsion between the electrons in the NH4+ molecule and the tetrahedral geometry of the ammonium ion.
Ammonia (NH3) and ammonium ion (NH4+) have different geometries due to the presence of an additional hydrogen ion (H+) in the ammonium ion. The H-N-H angle in ammonia is approximately 107 degrees, while the H-N-H angle in the ammonium ion is approximately 109.5 degrees. This difference in the H-N-H angles can be explained by the following reasons:
1. Electron repulsion: In the ammonium ion, there is an extra hydrogen ion that carries a positive charge. This positive charge attracts the electrons in the NH4+ molecule, resulting in a smaller bond angle. As a result, the electron pairs are pushed closer together, which causes the H-N-H angle to increase slightly.
2. Tetrahedral geometry: The ammonium ion has a tetrahedral geometry, with four equivalent bonds and bond angles of approximately 109.5 degrees. This geometry is more stable and has lower energy than the trigonal pyramidal geometry of ammonia. The tetrahedral geometry of the ammonium ion is due to the sp3 hybridization of the nitrogen atom, which results in four hybrid orbitals that are oriented towards the four hydrogen atoms.
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The table shows several combination reactions and the
estimated reaction energy based on bond breaking and forming energies. What pattern do you notice concerning the energy for combination reactions?
Inside the Table:
S(s)+O2(g)——> SO2(g)
Reaction: -550
2K(s)+Cl2(g)——>2KCl(s)
Reaction: -430
H2(g)+I2(s)—-> 2HI(g)
Reaction:-7
It takes energy to dissolve connections. Energy is released as a result of the creation of bonds.
What is meant by Chemical energy?Chemical substances emit energy as they undergo a chemical reaction and change into other substances, and this energy is known as chemical energy. Batteries, food, and fuel are a few examples of the storage media for chemical energy. Chemical compounds' bonds contain energy. Chemical reactions have the potential to release chemical energy, frequently in the form of heat; these kinds of reactions are referred to as exothermic. Some of the thermal energy that is required to drive a reaction can be stored as chemical energy in newly created bonds.Energy is the ability to carry out work. Potential, kinetic, thermal, electrical, chemical, nuclear, and other forms may all exist for it.To learn more about energy, refer to:
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Protons & electrons lab sheet
Part 4
Use the space on this page to pair up as many Element Model cards as you
can, based on the reactivity of their valence electrons. Write the combinations you come up with here. Remember, sometimes more than two elements can share electrons to equal a full outer shell!
ANSWER ASAP FOR BRAINIEST
There are different types of compounds formed by the combination of different elements. From the given element card some of the compounds possible to form include CO₂, H₂O, NaCl, HF etc.
What are compounds?Compounds are formed by the combination of two or more atoms of different elements. There are ionic compounds, covalent compounds coordination compounds etc,.
Ionic compounds are formed between metals and non-metals. For example, Na has 1 valence electron and Cl have 7 valence electrons . Hence, Na donate one electron to Cl and both achieve octet and form the ionic compound NaCl.
H have only one electron and F with 7 valence electrons. They both share one electron each to fill the shell and form the covalent compound HF. Other compounds possibly formed from this group includes, H₂O, CO₂, SO₂, NaF etc.
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An isotope of cesium (cesium-137) has a half-life of 30 years. If 1.0 g of cesium-137 disintegrates over a period of 150 years, how many g of cesium-137 would remain
If 1.0 g of cesium-137 disintegrates over a period of 150 years, then g of cesium-137 that would remain is : 0.03125 g.
What is meant by half life?Half-life is the time required for a quantity (of substance) to reduce to half of initial value and the term is used in nuclear physics to describe how quickly unstable atoms undergo radioactive decay .
90 years is 5 half lives because one half life is 30. So after 30 years, Fraction Remaining (FR) = 0.5^n, n is the number of half lives that have elapsed.
In the current problem we want to find the FR, and we know n = 5 half lives elapsed (150 yr/30yr = 5)
FR = 0.5^n = 0.5⁵= 0.03125
As we started with 1.0 g, and we have 0.03125 left, that would be 1.0 g x 0.03125 = 0.03125 g.
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True or False: Polyjuice potion allows the drinker to change to species?
The Polyjuice potion does not allow the drinker to change species. Hence, the given statement is False.
What is Polyjuice potion?Polyjuice Potion is described as a concoction that gave its user the ability to take on the appearance of another person which was actually a difficult, time-consuming, and difficult concoction. Even experienced witches and wizards found it difficult to properly prepare Polyjuice Potion because of its complexity.
This potion allows the taker to assume the physical appearance of another person which takes a month to make that must contain the part of the person we wish to appear. Polyjuice potion does not allow the drinker to change species. We can change age, sex and race by consuming the Polyjuice Potion, but not species.
Therefore, the given statement is false.
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which tells us more about an element's properties, its row or its column? Why is this?
Column tells us more about properties of an element in periodic table. Columns are also known as groups.
In a modern periodic table, atoms with comparable properties are grouped in the same vertical column and the elements are arranged in increasing order of their atomic number. With its atomic number, symbol, average atomic mass, and (occasionally) name, each box symbolizes an element. The components are arranged in 18 vertical columns called groups and seven horizontal rows known as periods or series. Each column's header lists the names of its groups. Roman numerals and capital letters have typically been used on labels in the United States. The IUPAC advises using the numbers 1 through 18, and these markings are more widely used. Parts of two of the rows, totaling 14 columns, are typically written below the primary table in order for it to fit on a single sheet.
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Which is NOT an example of a pure substance? A) Water. B) Air. C) A block of dry ice. D) Aluminum foil. E) Sugar
Option (b) is correct. Air is not an example of pure substances. Because it s made up of many substances and it does not have fixed formula.
A substance is said to be a pure substance which is a material that is free of impurities or contaminants. It has a constant chemical composition. No matter where you sample a pure substance, it is the same. Elements are the examples of pure substances. They consist of individual atoms, ions, or molecules. A pure chemical substance is a form of matter having constant chemical composition and characteristic properties. These chemical substance cannot be separated into its constituent elements by physical separation methods that is without breaking chemical bonds. AIr is not an example of pure substances.
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what is aspirin drug class
Aspirin belongs to the drug class of nonsteroidal anti-inflammatory drugs (NSAIDs). NSAIDs are a class of drugs that work by inhibiting the production of prostaglandins, which are responsible for pain, and fever.
Aspirin is specifically classified as an acetylsalicylic acid, which is a type of NSAID that is also used to reduce fever and prevent blood clots. In addition to its anti-inflammatory and analgesic properties, aspirin is also used in the prevention of heart attacks, strokes, and other cardiovascular events. Aspirin is one of the most widely used drugs in the world and has been in use for more than a century. Moreover, aspirin is offered in combinations with antacids, painkillers, and cough and cold remedies. Only aspirin-related information is covered in this monograph. Read the directions on the container or prescription label if you are taking a combination product, or ask your doctor or pharmacist for more information.
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why do some ionic compounds contain a roman numeral?
draw the structure of 3‑methylbenzoic acid in the space.
The prefix "3-" in the name serves as a reminder that the 3-methyl group (CH3) is joined to the benzene ring at the third carbon position (counting from the carboxylic acid group).
The benzene ring has a carboxylic acid functional group (-COOH) joined to it at the first carbon position. Acid 3-methylbenzoic An organic substance with the chemical formula C8H8O2 is 3-methylbenzoic acid. It is a member of the family of aromatic carboxylic acids known as benzoic acids. The melting point of 3-methylbenzoic acid, a white crystalline solid, is 167–169 °C. It is only weakly soluble in water, although it is soluble in ethanol and ether, among other organic solvents. It frequently serves as a fundamental component in the creation of other organic compounds.
[tex]CH3 | / \ / \ / \H3C O // / \ / \ / \ / \ C OH \ / \ / \ / \ / C | C | C | H[/tex]
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A compound has the molecular formula C5H10O, and strong absorptions at 1100 and 3350 cm−1. Which is the most likely structure for the compound?A). Cyclopentanol. B). C-H. C). Hydrogen bonding. D. 2500-3300 cm-1.
Answer:
Explanation:
The strong absorption at 3350 cm−1 indicates the presence of an O-H group, while the absorption at 1100 cm−1 indicates the presence of a C-O bond. Based on this information and the molecular formula C5H10O, the most likely structure for the compound is cyclopentanol, which has the molecular formula C5H10O and contains both a C-O bond and an O-H group.
Therefore, the correct answer is (A) Cyclopentanol.
The answer choices (B) C-H and (C) Hydrogen bonding are not directly related to the given information about the absorption spectra and the molecular formula of the compound. The answer choice (D) 2500-3300 cm-1 is a range of absorption frequencies for N-H and O-H stretching vibrations, but the given information only refers to the absorption at 3350 cm−1, which is within this range and indicates the presence of an O-H group in the compound.
The compound with molecular formula C5H10O and strong absorption at 1100 and 3350 cm−1 is most likely Cyclopentanol, indicated by the presence of a hydroxyl group and C-O stretching.
Explanation:The molecular formula C5H10O represents a compound with 5 Carbon atoms, 10 Hydrogen atoms, and 1 Oxygen atom. Given the absorption bands at 1100 and 3350 cm−1 within the infrared spectrum, the compound is most likely to be Cyclopentanol. The strong absorption at around 3350 cm-1 suggests the presence of an hydroxyl (—OH) group, characteristic for alcohols. The 1100 cm−1 peak can be attributed to C-O stretching. The structure of Cyclopentanol includes a five-member ring of carbons with the OH group attached to one of the carbons.
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