1046 J worth of heat energy is emitted.
We must calculate the heat energy emitted from the question using the specific heat formula, Q = mcT.
Q is the heat energy, and m is the mass.
The specific heat is c.
T stands for temperature change.
The answer is m = 25.0 grams.
ΔT = (20.0 - 10.0) (20.0 - 10.0) °C = 10.0 °C
c = 4.184 J/g °C (Specific heat capacity of water) (Specific heat capacity of water)
When the parameters are entered into the formula Q = mcT, we get Q = 25.0 4.184 10.0.
Q = 1046 J
Consequently, 1046 J worth of heat energy was discharged.
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In Lab, We Used Oxone To Oxidize Borneol To Camphor. Write Chemical Equations Describing The Reaction Of NaCl And Oxone.
Answer:
NaO2SO3 -> Na2SO4 + O2
Explanation:
The reaction of NaCl (sodium chloride) and Oxone (potassium peroxymonosulfate) is described by the following chemical equations:
The first step in the reaction is to dissociate oxone into its component ions:
Oxone (potassium peroxymonosulfate) -> K+ (potassium ion) + O2SO3- (peroxymonosulfate ion)
The peroxymonosulfate ion (O2SO3-) then oxidizes the sodium chloride (NaCl) to produce sodium peroxymonosulfate (NaO2SO3) and chlorine gas (Cl2):
NaCl + O2SO3- -> NaO2SO3 + Cl2
The sodium peroxymonosulfate (NaO2SO3) then decomposes into sodium sulfate (Na2SO4) and oxygen gas (O2):
NaO2SO3 ) -> Na2SO4 + O2.#SPJ4
.
How many grams of nano3 will dissolve in 100g of water at 20 C?
Nano3, or sodium nitrate, is a highly soluble compound, 22.5 g of nano3 will dissolve in 100 g of water at 20° C.
How to calculate grams?At 20° C the solubility of NaNO3 is 74 g/100 g
Thus, 74 g of NaNO3 will dissolve in 100g of water.
What is solubility? The amount of a substance that will dissolve in the most amount possible in a given amount of solvent at a certain temperature is known as its solubility. Varied compounds have significantly different solubilities. Solubility is a distinctive attribute of a particular solute-solvent pair.The substance is more soluble in water the more polar it is. The high water solubility of BTEX chemicals contributes to their frequent occurrence in groundwater.Common examples of solutions include adding sugar cubes to a cup of tea or coffee. Solubility refers to the quality that makes sugar molecules more easily dissolved.For more information on solubility kindly visit to
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Which of the following options correctly describe the most common dry cell battery?
1. A half-reaction shows the electrons gained by the reactants in a galvanic cell.
2. The overall process occurring in a galvanic cell includes both an oxidation and a reduction reaction.
3. The two parts are each known as half-reactions.
The following options correct : 1. A half-reaction shows the electrons gained by the reactants in a galvanic cell.
2. The overall process occurring in a galvanic cell includes both an oxidation and a reduction reaction.
3. The two parts are each known as half-reactions.
A dry cell is the battery which is made up of one or more electrochemical cells and convert the stored chemical energy in to the mechanical energy. the given all of the options are correct for the half reaction cell as :
1. In the galvanic cell the electrons are gained by the reactant is the half reaction cell.
2. The oxidation and the reduction reaction in the galvanic cell shows the occurring of overall process.
3. The half - reaction is the two parts of the overall reaction that is oxidation half - reaction and the reduction half - reaction.
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A saltwater solution is made by dissolving 2 pounds of salt in 9 gallons of water. At this rate, how many pounds of salt are needed for 18 gallons of water?.
a salt water is made by dissolving 4bpounds of salt in 18 gallons of water
Is cornstarch a physical or chemical property?
The reaction between cornstarch and water comes under physical change this is because at the end of the reaction cornstarch remains as cornstarch.
There is no formation of any new substance but rather there is a web like arrangement between the cornstarch and the water molecules.
The combination of cornstarch and water results in the formation of a suspension having non-Newtonian properties.
This is comparable to quicksand. When hot water is added to the to cornstarch causes it stars to denature, resulting in a more gelatinous solid.
Cornstarch is typically composed of 27% amylose and 73% amylopectin.
During the reaction the size and viscosity of the cornstarch molecules increases.
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What happens when pyruvate is broken down?
Pyruvate enters mitochondria and then enters the Krebs cycle, where it is broken down into carbon dioxide and water to produce ATP and other byproducts, which then enter the electron transport chain to produce more ATPs.
The citric acid cycle is regulated by calcium ions by activating pyruvate dehydrogenase, the first component of the pyruvate dehydrogenase complex reaction that produces acetyl-CoA. The cycle converts acetyl coenzyme A (acetyl CoA)'s chemical energy into the reducing power of nicotinamide adenine dinucleotide (NADH).
The Krebs cycle, also known as the TCA cycle (tricarboxylic acid cycle) or the Citric acid cycle, is a series of enzyme-catalyzed reactions that occur in the mitochondrial matrix and involve the oxidation of acetyl-CoA to form carbon dioxide and the reduction of coenzymes to generate ATP in the electron transport chain. The citric acid cycle is the mitochondrial hub for the final stages of carbon skeleton oxidative catabolism for carbohydrates, amino acids, and fatty acids.
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Which has higher freezing point 0.1 m NaCl or 0.1 M glucose?
0.1 M NaCl has a higher freezing point than 0.1 M glucose. This is because 0.1 M NaCl is a stronger electrolyte than 0.1 M glucose, which means it can form more ion-ion interactions with other molecules in the solution.
What is freezing point?The freezing point is the temperature at which a liquid turns into a solid. It is also known as the freezing temperature and is the point at which the molecules of a substance slow down enough for them to form a crystalline structure. The freezing point of a substance is determined by its chemical composition and the pressure the substance is under. Generally, the freezing point decreases as the pressure of the substance increases. For most substances, the freezing point is below 0°C (32°F). Water has a unique property, however, and its freezing point is 0°C (32°F) at a pressure of 1 atmosphere.
This increases the solution's boiling point and freezing point due to the increased attractive forces between the molecules.
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If 0.1 M NaOH solution was used in this titration, which statement correctly explains point B on the curve?
O This is the equivalence point of the curve.
O 0.003 mol of OH ions are present in the flask at this point.
O 0.0005 is the number of excess moles of OH ions at this point.
O 0.0005 is the number of moles of H* ions present at this point.
Answer:
The correct statement is: O This is the equivalence point of the curve.
Explanation:
The equivalence point is the point in a titration where the number of moles of acid added is equal to the number of moles of base needed to neutralize the acid. At this point, the acid and base react to form water and a salt. The pH at the equivalence point depends on the strength of the acid and base being used and the total volume of the solution. In general, the pH at the equivalence point will be higher for a strong acid-strong base titration than for a weak acid-strong base titration.
How many Mg ions are found in 1.00 mol of MgO?
The number of atoms found in a mole of compound has been given by relationship between the mole and the Avogadro number. The Avogadro number has been the constant that has been given by the number 6.023 × 10^23.
The relationship between the atoms and mole has been given by:
1 mole = 6.023 × 10^23 mg ions.
So, the number of mg ions that has been present in1 mole of the MgO has been equivalent to the Avogadro number.
Thus, 1 mole of MgO has 6.023 × 10^23 mg ions.
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Is hydrogen positive or negative charge?
Hydrogen is said to be positively charged and not negatively charged.
How is Hydrogen positively charged?A hydrogen atom loses an electron, becoming positively charged (it has a charge of +1), and this creates a hydrogen ion. Due to the fact that a hydrogen atom only possesses one proton and no electrons, a hydrogen atom is frequently referred to as only a proton.
A proton in the nucleus of a hydrogen atom is surrounded by one electron. In order to form a full outer shell and become more stable, hydrogen usually loses this electron or shares it with another atom in a covalent bond. Hydrogen is only one proton thick when its electron is removed, giving it a positive charge.
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What are the physical and chemical properties of cornstarch?
The physical properties of cornstarch are that s a white, tasteless, odorless powder substance which is used in food processing, papermaking, and the production of industrial adhesives.
It is also a component which is used in many cosmetics and oral pharmaceutical products and is also used as a lubricant in surgical gloves.
The chemical properties are that cornstarch is usually made up of 27 percent amylose and 73 percent amylopectin. Sometimes this ration varies when comparing different corn varieties, environmental and soil conditions.
The reaction of corn starch with water doesn't results in the formation of any new product and hence is known as a physical change.
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a student needs to prepare a 1h nmr sample for an organic compound soluble in chloroform (chcl3) . the student cannot use chcl3 as the solvent for the sample, but rather uses deuterated chloroform (cdcl3) because:
A typical solvent for NMR spectroscopy of organic compounds is deuterated chloroform.
What is CDCl3?
Chloroform (CHCl3) is a derivative of CDCl3, in which the hydrogen atom ("H") is switched to the heavy hydrogen isotope deuterium ("D").
CDCl3 is used because of the following two reasons
In order to stabilise the magnetic field strength, contemporary NMR spectrometers evaluate the solvent's deuterium absorption. The deuterium receiver detects a field fluctuation through a change in the observation frequency and can adjust the field intensity accordingly because the observation frequency is field dependant.
Deuterated solvents are used in place of common 1H-containing solvents to prevent the massive solvent absorption that would otherwise ruin the 1H-NMR spectra because there is always a lot more solvent in the sample than substance of interest.
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What is safe freezer temperature?
0 ° F is considered as a safe freezer temperature. Most germs are not killed by freezing, although it does halt them from multiplying.
What is safe freezer temperature?A freezer should generally be kept as close to 0°F as you can, with the exception of when you're adding a lot of fresh, warmer food. A flash freeze feature is available on some freezers, which lowers the freezer's temperatures for 24 hours to prevent freezer burn from temperature changes. For a few hours, you can choose to manually lower the freezer's temperature, but don't forget to adjust it back. Maintaining your freezer at a temperature that is too low may increase your energy costs and will result in food losing moisture and flavor. A freezer with a lot of ice buildup is a solid sign that the temperature is too low.For more information on freezer temperature kindly visit to
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What is the total number of electrons shared between the atoms represented in this formula.
The total number of electrons shared between the atoms in the picture is: C. 4.
How to determine the total number of shared electrons between the atoms?Shared electrons are the electrons that are used in covalent bonding between two atoms. It occurs when electrons from an atom bond with electrons from the neighbor atom.
In the picture given, we can translate the formula as follows:
. . . . . . . .
: O = O : --> : O : : O :
From the representation above, we can conclude that 2 pairs of electrons are shared between the atoms (shown as a double bond). Hence, the total number of electrons shared is: 4.
This question is incomplete. The complete query is as follows:
“Given the Lewis electron-dot diagram for oxygen gas (O2). What is the total number of electrons shared between the atoms represented in this formula?
Choose one below:
1248”The formula of Lewis structure is attached below.
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Answer the following questions. N OR N Would you expect the above compound to be aromatic? © Yes © No Choose the correct explanations for the aromaticity of the compound. Select all that apply. | The lone pairs on the nitrogen atoms do not contribute to aromaticity. The lone pairs on the nitrogen atoms do contribute to aromaticity. The lone pairs on the nitrogen atoms occupy sp2 hybridized orbitals. The lone pairs on the nitrogen atoms occupy sp3 hybridized orbitals. One of the lone pairs on the oxygen atom (inside the ring) occupies a p orbital, giving a continuous system of overlapping p orbitals containing six electrons. One of the lone pairs on the oxygen atom (outside the ring) occupies a p orbital, giving a continuous system of overlapping p orbitals containing six electrons.
The way that we can be able to know that the compound is an aromatic compound is that the compound has a continuous network of overlapping pi orbitals. Option B
What is aromaticity?We know that the term aromaticity has to do with the fact that the compound would have the same number of electrons that would correspond to the Huckel rule. If we look at the Huckel rule, we can nsee that the statement of the rule is that a specie would be aromatic if the specie has a total of n -1 number of pi electrons that are present in a molecule of the compound as we can see in the image that has been shown here.
Given that we have the compound as it has been shown, we can see that there is a continious stretch of the overlapping orbitals. The overlapping orbitals is how we can be able to know that the compound that is in question is an aromatic compound.
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Give the major product(s) for the following reaction: Your answer is the product from halogenation of the primary radical. The product from halogenation of the secondary radical is also formed.
The Cl₂ molecule breakes to form two radicals. One attacks the first double bond and forms the compound CH3-CH (Cl) -CH· -CH=CH₂. The CH radical further joins with the second Cl radical and form the product CH3-CH (Cl) -CH(Cl) -CH=CH₂.
What is halogenation?Halogenation is the reaction of organic or inorganic compounds with halogen atoms such as chlorine, bromine etc forming corresponding halides.
In the given reaction, Cl₂ molecule decomposes to form two Cl radicals thermally or photochemically. One Cl radical attacks the double bond and forms the product CH3-CH (Cl) -CH· -CH=CH₂ leaving one CH radical in it.
The second Cl radical is now available to attack the CH radical and finally produce the dihalide CH3-CH (Cl) -CH(Cl) -CH=CH₂.The compound is named as 3, 4 dichloropentene.
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What Is The Conjugate Base Of HBrO? (Hypobromous Acid) A. H+ B. H2BrO2 C. BrO- D. H2BrO+
The conjugate base of HBrO is BrO⁻.
In ionic equilibrium, we have a concept of conjugate base and conjugate acid.
According to bronsted lowry's acid and bases concept acid is defined as a substance that can donate a proton, and the base is defined as a substance that can accept a proton.
The base formed from acid is known as the conjugate base of the acid. Similarly, the acid formed from a particular base is called the conjugate acid of the base.
To form conjugate acid of HBrO, remove the hydrogen atom from HBrO.
Hence, the conjugate base of HBrO is BrO⁻.
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Early tables of atomic weights (masses) were generated by measuring the mass of a substance that reacts with 1.00 g of oxygen. Given the following data and taking the atomic mass of hydrogen as 1.00, generate a table of relative atomic masses for oxygen, sodium, and magnesium. How do your values compare with those in the periodic table? How do you account for any differences?
The correct formula of the compounds is: H2O,Na2O, and MgO but I don't know if this would help
An electron cannot have the quantum numbers n = ________, l = ________, ml = ________.
A) 2, 0, 0
B) 2, 1, -1
C) 3, 1, -1
D) 1, 1, 1
E) 3, 2, 1
An electron cannot have the quantum numbers n = 1, l = 1, and ml = 1. Therefore, option (D) is correct.
What are the quantum numbers?The set of numbers that can describe the position and energy of a particular electron are known as quantum numbers. Four quantum numbers are principal quantum numbers, azimuthal, magnetic, and spin quantum numbers.
Principal quantum numbers (n) can designate the principal electron shell and the most probable distance between electrons and the nucleus. The azimuthal quantum number (l) can designate the shape of an orbital and has a value equal to n -1.
The magnetic quantum number can designate the total number of orbitals in a particular subshell and the orientation of orbitals. It has value -l to l.
Therefore, n = 1 then l = 0, and ml = 0 as well.
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When 42 grams of potassium chloride KCl is dissolved in 100 grams of water at 50 ºC the solution can be correctly described as?
The solution can be correctly described as saturated solution.
What is saturated solution?
The chemical solution with the highest amount of a solute dissolved in the solvent is known as a saturated solution.
As clearly observed from the solubility diagram, the maximum amount (approx. 42 g) of KCl can be dissolve in 100g of water at 50°C. No more KCl will be dissolve in water at this temperature.
Saturated solution is a kind of solution that contains the maximum amount of solute being dissolve in solvent at a particular temperature.
Therefore, the solution can be correctly described as saturated solution.
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Q 5.67: Identify the relationship between the following compounds. Et Et HOH2C нонс H CH3 Br Br 110 A different compounds B constitutional isomers C diastereomers D enantiomers
The relationship between the following compounds is constitutional isomers. Therefore, option B is correct.
What are constitutional isomers ?Compounds that differ in connectivity, or the way the constituent atoms are joined to one another, are known as constitutional isomers. A key technique for counting them is graph theory.
Constitutional isomers are molecules with varying connections, similar to how red and green beads are arranged differently in simple bracelets. Stereoisomers are the second category. Stereoisomers have identical connectivity, but their component pieces are arranged differently in space.
Thus, option B is correct.
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Given the reaction: magnesium + water --> magnesium hydroxide + hydrogen at which temperature will the reaction occur at the greatest rate?.
100 degrees Celsius is the temperature at which the reaction will happen most quickly. So the correct answer is option D.
A chemical reaction is a process that transforms one or more chemicals into others by breaking or creating interatomic connections.
In chemical reactions, substances known as reactants are transformed into additional substances known as products. The following are the variables that influence a chemical reaction's rate:
Temperature
reactant concentration
an active catalyst
Reactants' surface area
At 100°C, the reaction will be happening at the greatest speed, and the reactants will be most likely to react with one another and form the products of the reaction. The reaction rate will be higher than at lower temperatures because at higher temperatures, more molecules will have enough energy to react and make the reaction happen more quickly.
Thus , the rate of reaction likewise increases with rising temperature. Therefore, at 100°C, the reaction rate will be at its highest.
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A. 25 degrees Celsius
B. 50 degrees Celsius
C. 75 degrees Celsius
D. 100 degrees Celsius
The element in the seventh group and the third period will have
Select one:
a.7 energy Levels and a valence of 3
b.3 energy levels and a valence of 7
c.7 energy levels and a valence of 5
d. 3 energy levels and a valence of 1
The element in the seventh group and the third period will have 7 energy Levels and a valence of 3. The element in 7th group and 3rd period is cobalt (Z = 27).
What is groups in periodic table?Groups in periodic table are vertical columns with elements having same number of valence electrons and similar chemical and physical properties. The valence of an element is the number of electrons that have to gained gained or lost from the element to achieve octet.
The element in 7th group and third period is cobalt with the atomic number of 27. The number of valence electrons is 9 in which 2 are in s electrons and 7 are in d orbital.
Therefore Co needs 3 more electrons to attain complete electronic configuration in d -orbital. Hence, there are 7 energy levels and valence of 3 for Co.
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John is doing a barbecue. He is using coal as fuel as he is cooking beef burgers.
Describe two chemical reactions that must happen in John's barbeque
Answer:
smoke
Explanation:
cause he must put a flame fire on the coal to heat the barbecue
The chemical reactions that must happen in John's barbeque the heat from your grill, frying pan, or toaster breaks down the proteins in your meal into amino acids in a process known as the Maillard Reaction. These amino acids then combine with the carbohydrates in the food to form this delicious brown mass.
What is Maillard Reaction ?The chemical reaction between amino acids and reducing sugars known as the Maillard process is what gives browned food its characteristic flavor. Foods that experience this reaction include grilled steaks, fried dumplings, cookies and other biscuits, breads, and toasted marshmallows.
By rearranging amino acids and particular simple sugars, which subsequently arrange themselves in rings and groups of rings that reflect light in such a way as to give the meat a brown color, the Maillard reaction specifically forms brown pigments in cooked meat.
Transformations of energy can be quite beneficial. For instance, when natural gas undergoes a chemical transformation in a furnace or grill. The gas' chemical energy is converted into heat energy, which cooks our food or keeps us warm.
Thus, the heat from your grill, frying pan, or toaster breaks down the proteins in your meal into amino acids in a process known as the Maillard Reaction.
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What will happen to the chocolate when exposed to heat Why do you think it happen?
When chocolate is heated, the cocoa butter crystals dissolve and it becomes liquid; however, if chocolate is heated to a high temperature, it can separate into charred, blackened cocoa particles and pale golden liquid.
When subjected to heat, what will happen to the chocolate?The texture, hardness, and gloss of chocolate are influenced by the way in which the various types of molecules are arranged within it. Chocolate melts into a liquid when heated because thermal energy disturbs the substance's ordered crystalline structure.
Why does heated chocolate separate?Similar to how melted butter separates into fats and milk proteins, cocoa butter, which melts between 93 and 101 degrees Fahrenheit/34 and 38 degrees Celsius, separates from the lipids and cocoa particles. The chocolate becomes grainy if it becomes too hot.
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a solution of a compound in water conducts electricity, turns litmus red, and has a sour taste. what compound might be in the solution?
A compound's solution in water has a sour taste, colors litmus red, and conducts electricity.The substance in the solution can be acidic.Mg(OH)2
What is the common name for Mg OH 2?Magnesium(2+) hydroxide or Milk of Magnesia are other names for it.It is a major ingredient in antacids and naturally occurs as the mineral brucite.Magnesium hydroxide's chemical name is Mg(OH)2.
What use does Mg OH 2 serve?As an antacid, magnesium hydroxide is employed to treat heartburn and indigestion.It works by neutralizing the stomach's hydrochloric acid to produce magnesium chloride & water.
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Please label she components of a common filter setup and answer the folowing question. All items will be used. Büchner funnel correct. rubber adaptor is item allows twovacuum connection eces of glass to fit gether to form a seal. Büchner f filter flask vacuum connection rubber adaptor unne filter flask What are two uses of a vacuum filtration setup? Select all that apply. crystallization of a solid from a solution separation of a solution and a precipitate drying a filtered solid storage of a solution
Please answer the following question and list the components of a typical filter setup. Everything will be crystallization. correct Büchner funnel Two vacuums are enabled by the rubber adaptor.
The most typical illustration is brewing tea. Tea leaves and water are separated during tea preparation using a filter or sieve. The pores of the sieve will only let water through. After this point, the band stop filter prevents frequency, whereas the bandpass filter allows it. The maximum frequency at which the output power is lowered is known as the upper cutoff frequency. Vacuum filtration: What is it? Suction filtration, another name for vacuum filtration, is a crystallization technique that is frequently used in chemistry labs to more precisely filter the given sample. General Considerations for Design of Digital Signal Processing.
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The Major Product Of The Following Reaction Would Be: I II III IV An Equimolar Mixture Of I And II
To solve such this we must know the concept of nucleophilic substitution reaction. Therefore, the correct option is option II. Primary alkyl halide are suitable for SN2 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.
The characteristics of SN2 mechanism:
It is a nucleophilic substitution reaction.
Leaving group, a nucleophile, electrophile and a solvent are present
The product formed is the inverted product.
The attack of nucleophile is from backside of the leaving group.
The order of reactivity of alkyl halide is 1°>2°>3°.
Therefore, the correct option is option II.
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Provide an IUPAC name for the structure shown ball & stick (Use cis/trans terms for cyclic structures. Do not specify stereochemistry in other cases. It is not necessary to use italics in writing compound names.)
The IUPAC name for the structure shown ball and stick is methyl derivatives of cyclobutanol.
What are IUPAC names?An IUPAC name will typically have three key characteristics: a major chain or ring of carbon atoms found in the molecular structure, also known as a root or base. A suffix or additional element(s) denoting potential functional groups in the compound.
Whether in a continuous chain or a ring, the longest chain of carbons joined by a single bond serves as the basis for IUPAC nomenclature. According to a particular set of priorities, all deviations, whether multiple bonds or atoms other than carbon and hydrogen are denoted by prefixes or suffixes.
Therefore, IUPAC refers to the ball and stick-shaped structure as methyl derivatives of cyclobutanol.
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Can you answer these for me please
Fluorine is the most electronegative among the group and tends more to gain an electron by chemical bonding. For the same reason, fluorine is more reactive than bromine. magnesium is more reactive than calcium because, Ca contains more inner electrons and experience shielding effect.
What is electronegativity?Electronegativity is the ability of an atomic nucleus to attracts its own electrons as well as the bonded electrons. Fluorine has the highest electronegativity than any element in periodic table.
F is more prone to be reactive since it needs gain an electrons to achieve stability. Cl has the same number valence electrons and but it contains more inner electron which shield each other. The most electronegative F will be more reactive in the group. For the same reason F is more reactive than Br also.
Potassium is more reactive than lithium because, potassium contains more loosely bound electron in its valence shell. Hence, it can be easily lose that electron through chemical bonding.
Magnesium is less reactive than Ca because, its valence electrons are more close to the nucleus. Whereas, Ca has one more shell in which the valence electrons are located which can be easily participated in bonding.
Similarly, oxygen is more reactive than sulfur, because, oxygen is highly electronegative and it tends to gain two electrons by reaction.
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