Ideal gas law is valid only for ideal gas not for vanderwaal gas. Therefore, when the pressure decreases, molar volume increases. Ideal gas is a hypothetical gas.
What is ideal gas equation?Ideal gas equation is the mathematical expression that relates pressure volume and temperature. There is no force of attraction between the particles.
Mathematically the relation between Pressure, volume and temperature can be given as
PV=nRT
where,
P = pressure of gas
V= volume of gas
n =number of moles of gas
T =temperature of gas
R = Gas constant = 0.0821 Latm/Kmol
According to above equation we can see that pressure is inversely proportional to volume. On decreasing the pressure, volume will increase.
Therefore, when the pressure decreases, molar volume increases.
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Answer:
A. molar volume increases
Explanation:
Checked on edge.
What is the correct formula to use in calculating the freezing point depression?
The freezing point depression formula is ΔTf = Kf ·m, where ΔTf is the freezing point depression, Kf is the cryoscopic constant, and m is the molality of the solution.
The temperature when a liquid changes into a solid is known as the freezing point.. It is the temperature at which the molecules of the liquid become less active and form a solid structure. For a given substance, the freezing point is usually the same as the melting point, the temperature at which a solid changes to a liquid.Other substances have different freezing points; for example, oxygen freezes at -218°C (-361°F) and hydrogen at -259°C (-434°F). Freezing point is an important concept in the study of thermodynamics, as it is the point at which the energy of a system changes form and the phase of the substance changes.
ΔTf is the difference between the freezing point of the pure solvent and the freezing point of the solution. Kf is the change in freezing point per mole of solute. m is the number of moles of solute per kilogram of solvent.
In other words, the freezing point depression formula can be used to calculate the freezing point of a solution based on the freezing point of the pure solvent and the molality of the solute.
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an engine that has been configured to run on propane (c 3h8) combusts with 20% excess air. a. write the balanced stoichiometric reaction and calculate the stoichiometric air/fuel ratio. b. write the balanced reaction with 20% excess air and calculate the actual air/fuel ratio at which the engine is operating. c. calculate the equivalence ratio and discuss the result
When an air and fuel mixture has more gas than what is required for efficient combustion, a lean burn results.The ideal combustion ratio for burning propane entirely is 1 part propane (4%) to 24 parts air (96%).
If the area has a cold snap while your propane tank is much less than 20% full, you may run out of propane faster than you expect.If there isn't any propane, your house won't be warm.Without heat, your home is dangerous and uncomfortably cold.Additionally, it's possible for your pipes to freeze or explode.
A 20 pound gas tank can it explode?Yes, they could, although this usually only applies to the portable, 20-lb grilling tanks, not the larger ones.A warm summer day can easily raise temperatures.Even as the portable propane tank warms up, the pressure will rise.
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Matter -Is anything that takes up space and has mass
Answer: True
Explanation: physical substance in general, as distinct from mind and spirit; (in physics) that which occupies space and possesses rest mass, especially as distinct from energy.
•
The combustion of one mole of benzene, C6H6, in oxygen liberates
3268 kJ of heat. The products of the reaction are carbon dioxide and
water. How much heat is given off when 183 g of oxygen are
reacted
with
benzene?
excess
(AH°f[H₂O0] =-285.8 kJ/mol, AH°f[CO2(g)] = -393.5 kJ/mol)
Specific heat capacity of a substance is the amount of heat required to raise the temperature by one degree Celsius of one gram of a substance. Therefore, 2,488.03kJ/mol heat is given off when 183 g of oxygen are reacted with benzene.
What is Enthalpy?Enthalpy term is basically used in thermodynamics to show the overall energy that a matter have. Mathematically, Enthalpy is directly proportional to specific heat capacity of a substances. Internal energy is the sum of all kinds of energy that the particles of a matter can possess, for example translational energy. Rotational energy.
ΔHf = ∑ n ΔHproducts - ∑ n ΔHreagents
1 C₆H₆ + 7.5 O₂ → 6 CO₂ + 3 H₂O
moles of oxygen =183 /32
=5.71 mole
7.5 mole of oxygen reacts with 1 mole of benzene
1 mole of oxygen reacts with 1/7.5 mole of benzene
5.71 mole of benzene reacts with 1/7.5×5.71 =0.76moles
energy for one mole of benzene =3268kJ/mol
energy for 0.76moles of benzene =0.76×3268
=-2,488.03kJ/mol
Therefore, 2,488.03kJ/mol heat is given off when 183 g of oxygen are
reacted with benzene.
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explain the statement, the standard electrode of zinc is -0.76 v
The standard electrode of zinc is -0.76 V means that the zinc electrode behaves as an anode.
The negative sign of the standard potential suggests that when the electrode is attached to the Standard Hydrogen electrode (SHE) it behaves as an anode. Oxidation takes places at anode. Standard electrode potential is the potential measured for the half cell against the Standard electrode at the standard conditions.
Therefore, the standard electrode of zinc is -0.76 V means that the Zinc electrode behaves as an anode and oxidation occur at this electrode.
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Chemical Equation for Positive Permanganate Test: Chemical Equation for Positive Fuchsin-Aldehyde Test: Chemical Equation for Postiive lodoform Test: Chemical Equation for Semicarbazone Formation: Chemical Equation for 2,4-Dinitrophenylhydrazone Formation:
The positive permanganate test occurs when a compound is oxidized by potassium permanganate, which results in the formation of manganese dioxide as a precipitate. This reaction's general chemical equation is:
Compound + Potassium Permanganate -> Manganese Dioxide + Other productsThe positive fuchsin-aldehyde test occurs when a compound reacts with fuchsin and aldehyde to form a pink or red color. The specific chemical equation for this reaction is not available, as it depends on the compound being tested.
The positive iodoform test occurs when a compound reacts with iodine in the presence of base to form iodoform (CHI3), which has a characteristic sweet, medicinal smell. This reaction's general chemical equation is:
Compound + Iodine + Base -> Iodoform + Other productsSemicarbazone formation occurs when a compound reacts with a semicarbazide to form a semicarbazone. This reaction's general chemical equation is:
Compound + Semicarbazide -> Semicarbazone2,4-dinitrophenylhydrazone formation occurs when a compound reacts with 2,4-dinitrophenylhydrazine to form a 2,4-dinitrophenylhydrazone. This reaction's general chemical equation is:
Compound + 2,4-Dinitrophenylhydrazine -> 2,4-DinitrophenylhydrazoneThe answer is general since the question is incomplete and the similar one is unavailable.
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Draw as many Lewis structures of C4H8 as possible. Every Lewis structure should include one double bond between 2 C atoms.
The possible Lewis structures of C₄H₈ with every Lewis structure include one double bond between 2C atoms is attached as a picture.
The alkene butene, often known as butylene, has the chemical formula C₄H₈. Any of the several chemicals may be referred to by the word "butene." They are odorless gases that are found in crude oil in trace amounts that are insufficient for practical extraction. Therefore, butene is produced through the catalytic cracking of long-chain hydrocarbons left behind after crude oil has been refined. Fractional distillation is used to separate the butene from a mixture of products created by cracking.
There are five different constitutional isomers that can be formed using the formula C₄H₈. But-1-ene, but-2-ene, 2-Methylpropane, Cyclobutane, methylcyclopropane.
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name one substance formed when phosphorus smoulders is in excess oxygen
Answer:
Phosphorus pentoxide when phosphorus smoulders in excess oxygen produces phosphorus pentoxide; this is a very strong oxidizer and can catch fire easily.
Explanation:
When phosphorus smoulders in excess Oxygen it reacts with the oxygen to form Phosphorus pentoxide, a strong oxidizing agent, which makes it catch fire easily if there is any contact with other flammable materials.
What is the orbital of C?
When a carbon atom bonds with one s-orbital and two p orbitals, it becomes sp2 hybridized. Between the three atoms, two single bonds and one double bond are formed.
What is Hybridization of carbon ?
Four sp3 orbitals are created when the 2s and all three of the 2p orbitals of carbon combine. Through an overlap of the sp3 and s orbitals, these orbitals subsequently form a link with four hydrogen atoms to form methane.
According to the given question:
Carbon consists of six electrons. In the 1s orbital, just outside the nucleus, there will be two of them. The following two will enter the orbital phase 2s. The rest will be split into two distinct 2p orbitals.
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During mr. Nye's science class, students were expected to identify various substances using physical properties they could easily measure. Mr. Nye gave each of the five groups a green, metal cube and asked them to identify what the cube was made of. Matt's cube, after 5 trials, had an average density of 7. 40 g/cm3. His group's cube was made of.
Matt's cube, after 5 trials, had an average density of 7.40 g/cm3. From this data, Matt's group was able to determine that the cube was made of zinc.
Zinc is a silver-white metal that is commonly used for galvanizing, die-casting, and other industrial uses. It has a relatively low melting point compared to other metals, and its density is 7.14 g/cm3, making it a relatively dense metal. The average density of 7.40 g/cm3, as measured by Matt's group, is also slightly higher than the expected value of 7.14 g/cm3, possibly due to the presence of impurities in the alloy.
In order to identify the metal cube, Matt's group relied on the physical properties of the metal to make their determination. They measured the density of the cube and compared it to the expected values for various metals. By doing this, they were able to narrow down the possible metals to zinc, and their final determination was that the cube was made of zinc.
The experiment was a great success for Matt's group, as they were able to take the data they collected and accurately identify the metal the cube was made of. Through this experiment, Matt and his group were able to demonstrate their understanding of physical properties and how they can help identify various substances.
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What is the accurate Lewis Structure for CH3CH2COOH?
The accurate lewis structure for a CH₃CH₂COOH molecule is in the image attached to this answer.
Lewis structure is a very simplified representation of a molecule. It was introduced in 1916 by Gilbert N. Lewis. Lewis structure shows a molecule, what atoms it's composed of, where each atom is located, the bonds between each atoms, and whether there is any excess electrons or not.
In the Lewis structure of a CH₃CH₂COOH molecule, you can see that:
There are 5 number of C - H bonds.There is 1 O - H bond.There are 2 C- C- bonds.There are 3 C - O bonds.There are four unshared pairs of excess electrons.Learn more about lewis structure at https://brainly.com/question/20300458
Which storage practice can cause cross contamination?
Incorrect storage of food items can cause cross contamination.
What is Contamination?
Contamination is the presence of a pollutant or a foreign substance in an environment, such as air, water, or soil, which can have a negative impact on the surrounding environment and the organisms that live in it. Contamination can occur naturally or be caused by human activities, such as the release of chemicals, oil, or other hazardous materials into the environment.
This could include storing raw food items above cooked or ready-to-eat items in a refrigerator, improperly covering and sealing food items, and not properly labeling food items.
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In SF6, which intermolecular force(s) is/are present? Dispersion, dipole-dipole and hydrogen bonding forces are present. Only dispersion forces are present. Only dispersion and dipole-dipole forces are present. Only hydrogen bonding forces are present. Only dipole-dipole and hydrogen bonding forces are present.
What intermolecular force(s) are present in SF6? Hydrogen bonding, dipole-dipole, and dispersion forces are present. There are only dispersion forces at play. just dipole and dispersion
Intermolecular force types. Dipole-Dipole Interactions, part one. Polar molecules are attracted to one another through dipole-dipole interactions. Permanent dipoles are present in polar compounds. Ion-Dipole Interactions, Section 2. Ion Induced Dipole Interactions, number 3, Dipole-Induced Dipole Interaction, Figure 4. Dispersion forces or London forces, number five. Because it mirrors the strength of intramolecular forces, the hydrogen bond is the only intermolecular force with the word "bond" in its name. A hydrogen atom's attraction to molecules that contain highly electronegative atoms like nitrogen (N), oxygen (O), and fluorine (F) (F).
The strongest intermolecular force is a hydrogen bond, with
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How many moles of K₂CO3 are in a 150.0 g sample
Answer:
1.08 mol
Explanation:
To find the number of moles of potassium carbonate (K2CO3) in a 150.0 g sample, you need to know the molar mass of K2CO3. The molar mass is the mass of one mole of a substance, and it is expressed in grams per mole (g/mol).
The molar mass of K2CO3 is 138.20 g/mol. To find the number of moles in a 150.0 g sample, you can divide the mass of the sample by the molar mass:
Number of moles = mass / molar mass
= 150.0 g / 138.20 g/mol
= 1.08 mol
Therefore, there are 1.08 moles of K2CO3 in a 150.0 g sample.
Answer:
1.09 mol
Explanation:
The mass of K₂CO3 is 138
How
by calculating the individual molecular mass
K₂ + C + O3
= 2(39) + 12 + 3(16)
= 78 + 12 + 48
= 138g
formula for finding mole is
[tex]mole = \frac{given \: mass}{molar \: mass} [/tex]
[tex]mole = \frac{150}{138} [/tex]
mole = 1.0869565217
approximately
mole = 1.09 (2d.p)
i hope this helps
QUESTION 32 Convert 0.23 moles H2O to number of molecules. 3.8 x 10-25 O 0.0039 O 1.39 x 1023 13.4 QUESTION 33 What are the products in the single displacement reaction of Ca and HCI. CaCl, H2 CazCI, H2 CaCl2, H2 OCapci, H2 QUESTION 34 What are the products in the double displacement reaction, Na2SO4 + NH4CI --> NaCl, (NH4)2SO4 Na2CI, (NH4)2SO4 NH4N, CISO4 CO2, H20 Click Save and Submit to save and submit. Click Save All Answers to save all answers 3623
A) the number of water molecules in 0.23 moles is equal to 1.5 × 10²³.
B) The single displacement reaction:
Ca + 2HCl → CaCl₂ + H₂
C) The double displacement reaction:
Na₂SO₄ + 2NH₄Cl → 2NaCl + (NH₄)₂SO₄
What is displacement reaction?A displacement reaction can be described as one wherein a set of atoms is displaced by another set of atoms in a molecule.
A single displacement reaction can be demonstrated as a kind of redox reaction when an element moves out of its compound or one element is replaced by the other element from its own compound.
Double displacement reactions are carried out in aqueous solutions wherein the ions precipitate and exchange of ions happens.
The single displacement reaction between the calcium and HCl acid gives hydrogen gas and calcium chloride.
Ca + 2HCl → CaCl₂ + H₂
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Draw the Lewis structure for CH2O2
There are 18 valence electrons in total, and eight of them are used to create the four sigma covalent bonds in HCOOH ([tex]CH_{2}O_{2}[/tex]). Lewis structure is given below.
There are 18 valence electrons in the Lewis structure of HCOOH. Eight bonding electrons from them create four sigma covalent bonds in the Lewis structure of HCOOH. The last 10 electrons are non-bonding electrons that are located on the two oxygen atoms of the Lewis structure of HCOOH. Five of the ten non-bonding electrons on the HCOOH Lewis structure, which is supported by two oxygen atoms, are lone pair electrons. There are three lone pair electrons on one oxygen atom and two on another oxygen atom. As a result, there are five lone electron pairs altogether in the HCOOH Lewis structure.
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If you push repelling ends of magnets together really hard and let go of one of the magnets, you will have done what?
When you push repelling ends of magnets together really hard and let go of one of the magnets, you have reduced the potential energy between the magnets.
What is the magnet?When we talk about a magnet, we are talking about a material in which the magnetic domains have been properly aligned. The implication of this is that the material is able to cause the magnetic fields of other materials to also become aligned.
Thus the magnet is able to pick up the materials that are magnetizable such as the metals that can be attracted by it. If two magnets are repelling, the potential energy between the magnets would decrease as the magnet are being pushed apart.
As such, when you push the magnets together, the potential energy that is existing between the magnets would become reduced.
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Who did Cupid fall in love with?
Instead, Cupid fell in love with Psyche to the point where he married her, but only under a condition that she never see his face.Psyche eventually gave in to her curiosity and sneaked a glimpse, sending Cupid running in rage.
How did Psyche become Cupid's love interest?In order for Psyche to fall in love to something repulsive, Cupid is dispatched to shoot her with an arrow.Instead, he uses his own dart to scratch himself, which makes anything that is alive fall in loves with the very first thing he sees.He consequently breaks his mother's command because he is so in love with Psyche.
Who was the wife of Cupid?Eros (Roman Cupid), the deity of love, and his wife PSYKHE (Psyche), the goddess of a soul.She was originally a mortal princess, and when mankind started to worship her instead of the goddess Aphrodite (Roman Venus), the goddess became enraged.
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What are the factors that affect cleaning and sanitizing efficiency?
Duration, temperature, mechanical treatment, chemical reaction, and methods are the five main aspects that influence cleaning and are all equally crucial.
What aspects of sanitization influence them?Ground conditions, notably groundwater level, soil permeability, and soil stability, are significant factors in the selection of sanitation technology.
What three things must be taken into account when cleaning and sanitizing?The following three things need to be taken into account:Concentration: If there is insufficient sanitizer present, hazardous germs won't be sufficiently reduced.A lot of it can be harmful.Chemical sanitizers typically function best in liquid that is between 55°F (13°C) and 120°F in temperature (49oC).
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Do M&M's melt in your hand?
Answer:
yea hold them in your hand for a while and your hand will look like a rainbow
Explanation:
Which elements form ionic bonds?
The elements which tends to form ionic bonds are metals and non-metals. Hence, the compounds that are formed from metals and nonmetals have ionic bonds between them.
Ionic bond, also known as electrovalent bond is a type of linkage that is formed from the electrostatic attraction between oppositely charged ions in a chemical compound. Ionic bonds are formed when the valence (outermost) electrons of one atom are transferred permanently to another atom.
Ionic compounds are generally formed between elements that are metals and elements that are nonmetals. For example, let's consider the metal calcium (Ca) and the nonmetal chlorine (Cl) form the ionic compound calcium chloride (CaCl₂). In this ionic compound, there are two negative chloride ions (anions) for each positive calcium ion (cations).
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Please fully evaluate the IR spectrum of dibenzalacetone. Please include the IR absoprtion frequencies of the functional groups, type of vibration (bend, stretch), as well as the functional group that caused those frequencies (ketone, aromatic, etc...).
For example:
C-H Stretch
Aromatic
3000-3100 cm-1
The IR absorption frequencies of the functional groups is follows 3000-3300-Sp2 C-H stretching; 1500-1800-C=O stretching; 1400 -1500-Aromatic C=C stretching; 600-900-Alkene =C-H bending.
A number of steps are used to demonstrate the base-catalyzed aldol condensation synthesis of dibenzalacetone. The electrophilic carbonyl carbon in benzaldehyde is attacked in step one by an acetone anion acting as a nucleophile, resulting in the formation of a hydroxyl ketone.
After the hydroxide exits in step two, a double bond is created. The active nucleophile then transforms into an intermediate and attacks a benzaldehyde to create the second hydroxyl ketone.
In step three, the reaction is repeated, resulting in the formation of a second double bond, dibenzalacetone. There are three possible isomers of dibenzalacetone. Trans, trans (E,E), trans, cis (E,Z), and cis, cis are the three distinct isomers (Z,Z).
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what is the total number of valence electrons in the lewis structure of xeo4? electrons 2 question content area draw a lewis structure for xeo4. do not include overall ion charges or formal charges in your drawing. if the species contains oxygen, do not draw double bonds to oxygen unless they are needed in order for the central atom to obey the octet rule.
Total number of valence electrons in the Lewis structure of XeO4 is 32.
Valence electrons are electrons that located in the outermost electron shell of an atom. These electrons, being the furthest from the nucleus and thus the least tightly held by the atom, are the electrons that participate in bonds.
Lewis structure - A Lewis Structure is a very simplified representation of the valence shell electrons in a molecule. It is used to show how the electrons are arranged around individual atoms in a molecule.
Lewis structure of XeO4 is made up of one xenon and four oxygen atom, the xenon is in a central position, and all oxygen is at the surrounding position. There are four double bonds(Xe=O) present in the XeO4 lewis structure. The lewis structure of XeO4 contains 8 pairs of nonbonding electrons and 8 pairs of bonding electrons.
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suppose we have two reactions, a⟶b and b⟶c. you can isolate b, and it is stable.
To solve such this we must know the concept of chemical reaction. Therefore, b is not transition state as Transition state is not stable in a reaction.
What is chemical reaction?Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, double displacement reaction.
For b can be isolated or not, we must know whether b is transition state or intermediate by drawing energy level diagram. Intermediate can be isolated and it is stable. Transition state is not stable and hence can not be isolated.
Therefore, B is not transition state.
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what is the difference between the electron domain geometry of a molecule and its molecular geometry?
The fundamental distinction between electron domain geometry and molecular geometry is that electron geometry is found by taking both lone electron coordinates and bonds in the atom while molecular geometry is found utilizing just the bonds present in the atom.
Electron domain geometry is the state of a particle anticipated by considering both bond electron matches and solitary electron matches. The VSEPR hypothesis expresses that electron matches situated around a specific molecule repulse one another. These electron matches can be either holding electrons or non-holding electrons.
Molecular geometry is the state of a molecule anticipated by considering just bond electron matches. For this situation, lone electron matches are not considered. Also, two fold bonds and triple bonds are considered as single bonds.
Electron geometry is found by taking both the lone electron pairs and the bonds in a molecule whereas molecular geometry is found by using only the bonds present in the molecule.
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What is chemical equation class?
A chemical equation is a symbol- and formula-based symbolic representation of a chemical reaction, with the reactant entities given on the left side and the product entities given on the right. Examples are NaOH+HClNaCl+H2O.
How do chemical equations work?They are equations that use chemical symbols and formulae to express chemical reactions. The reactants are shown on the left in a chemical equation, and the products are shown on the right.
A complete chemical equation is what?An arrow symbol, a list of reactants (the substances used to initiate the reaction), and a list of products (the substances produced during the reaction) make up a chemical equation.
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you are trying to determine a tlc solvent system which will separate compounds a, b, and c.you ran the compounds on a tlc plate using hexanes/ethyl acetate 95:5 as the eluding solvent and obtained the following chromatogram: how could you change the solvent system to give better separation of these three compounds?
Answer:
Thin layer chromatography is a chromatographic technique used to separate the components of a mixture using a thin stationary phase supported by an inert backing and a mobile phase. The separation principle is in the different affinities between the components of the mixture and the stationary or mobile phase.
The affinity in mobile phase could be improved changing the polarity of this phase. In this case, you could change proportion of hexane/ethyl acetate to change polarity of mobile phase and the affinity of the different compounds to mobile or stationary phase.
Explanation:
Define latent heat of fusion.
Answer:
latent heat of fusion of ice is the amount of heat required to change the state of a body from solid to liquid at a constant temperature .
Naming Alkyl Halides 10-22 Name the following alkyl halides: (a) H3C Br Br CH3 (c) Br CI CH3 CH3CHCHCHCH2CHCH3 CH3CH=CHCH2CHCH3 CH3CCH2CHCHCH3 CH3 (e) CICH2CH2CH2CCCH2Br CH2Br CH3CH2CHCH2CH2CH3
The given compounds can be named based on the IUPAC rule. The compound A is named as dibromoethane and B is 2-bromo-3-chloro-4-methyl heptane. The compound C is hex-2-ene. Compound d is named as heptane and e is called 1-chloro-6-bromo-hexane. The name of the compound f is 2-chloro hexane.
What are IUPAC rules?IUPAC rules are certain rules regarding the naming of organic compounds. The compounds are numbered based on the longest chain of carbon atoms in it. The numbering starts from the position of double bond or triple bond if present or the functional groups is noted.
The name is given in the alphabetical order of the prefix of the functional groups and the numbering is put in a manner that the carbons bearing the functional groups have the small numbers.
The given compounds can be named based on the IUPAC rule. The compound A is named as dibromoethane and B is 2-bromo-3-chloro-4-methyl heptane. The compound C is hex-2-ene. Compound d is named as heptane and e is called 1-chloro-6-bromo-hexane. The name of the compound f is 2-chloro hexane.
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draw the two resonance lewis structures for TeO2
Two-resonance Lewis structure for TeO₂ can be seen on attached file. Resonance structures are a representation of a single polyatomic that contain two or more Lewis structures.
What is Lewis structure?
Lewis structure is a simple representation of how electrons position around every atom in a molecule. It is also can be define as a portrayal of valence electron in the molecule. Here is the step to draw the Lewis structure:
Determine valence electrons in the molecule. base on periodic table Te has 6 valences and O has 6 valencesDraw the structure that connect all atom. The draw will be O - Te - OAdd a solo pair of electrons. Solo pair will be 3 on each O and 1 on Te. If there is remaining electrons, use it to complete the octet in the central atom by make a double bound on it. Since Te Has 6 valences, We will add 2 more connection to central from O - Te - O to O = Te = O Establish the normal charge of all atom. To calculate it you can use formula: group number of atom - half number of electrons that bound - number of solo pair electrons. See the attached file.Learn more about Lewis structure here
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