After addition of potassium iodid either water or kl could react at each of the electrodes but only one reaction will occur because of the no longer take part withinside the reactions, even though they're present.
Electrical energy (batteries, energy line) is transformed into light, that is a shape of energy, and heat. As the filament in a bulb or a pencil lead receives warmer and warmer, atoms withinside the filament begin quicker and sooner or later get so warm that they could supply off light.
In aqueous potassium iodide, KI, an ionic solid, dissociates into the ions K+ and I- (K+ ions aren't proven withinside the response schemes, due to the fact they do now no longer take part withinside the reactions, aleven though they're present). The water itself is likewise in equilibrium among H2O and H+ and OH-.
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How fast is a ball going when it hits the ground after being dropped from a height of 9 m? The acceleration of gravity is 9.8 m/s
Answer:
[tex]\huge\boxed{\sf v_f = 1.48\ m/s}[/tex]
Explanation:
Given Data:Height = h = 9m
Acceleration due to gravity = g = 9.8 m/s²
Initial Velocity = Vi = 0 m/s
Required:Final Velocity = Vf = ?
Formula:[tex]2gh = v_f^2 - v_i^2[/tex] (Third equation of motion for free-falling bodies)
Solution:2(9.8)(9) = vf² - 0²
2.18 = vf²
vf² = 2.18
Take sq. rt on both sides
vf = 1.48 m/s[tex]\rule[225]{225}{2}[/tex]
What are the 3 goals of fire prevention?.
The three goals of fire prevention include to lessen the risk of ignition, to enable quick emergency response, and to guarantee safe emergency evacuation of residents.
The objectives of fire-prevention programs are avoiding fatalities, property loss, and building inactivity. It is common for fires to disrupt corporate operations, destroy important records, reduce employee productivity, and result in liability claims if the fire spreads to nearby premises. These are the goals of fire prevention.
Your fire prevention strategy must at the very least include: The types of fire protection equipment required to control each major hazard, a list of all major fire hazards, safe handling and storage practices for hazardous materials, potential ignition sources and their control measures.
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A researcher uses several procedures to separate a rock sample into different chemicals. A mass of 50 grams of one chemical is produced. If this chemical cannot be separated into other chemicals, then it is best described as.
A mass of 50 grams of one chemical is produced. If this chemical cannot be separated into other chemicals, then it is best described as an element.
An element is a pure substance that cannot be chemically or physically broken down into simpler substances. Elements are the simplest form of matter, so they cannot be broken down into simpler substances chemically or physically. Elements are the building blocks of all other matter.
Atoms cannot be created or destroyed in chemical reactions so elements such as phosphorus and sulfur cannot be broken down into simple substances by these reactions. A compound is a substance composed of two or more chemically bonded elements that can be separated into simpler substances only by chemical means. Elements are pure substances that cannot be broken down into simple substances by ordinary chemical means.
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A liquid can evaporate at any temperature, producing vapor above the surface of the liquid. This vapor exerts a pressure, which is called the ___________. This pressure increases as the temperature of the liquid increases. When this pressure equals the external pressure, the liquid has reached its ___________.vapor pressure; boiling point
A liquid can evaporate at any temperature producing vapor above the surface of the liquid. the vapor exerts a pressure which is called the vapor pressure. When pressure equals the external pressure, the liquid has reached its boiling point.
At a higher temperature, a greater fraction of molecules have enough energy to escape from the liquid. The escape of more molecules per unit of time and the greater average speed of the molecules that escape both contribute to the higher vapor pressure. As temperature increases, the vapor pressure also increases due to the increased average KE and it increases equal the external atmospheric pressure, it reaches its boiling point.
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some amount of ideal gas with internal energy u and initial temperature 100 was compressed to half of volume meanwhile absolute pressure
A little amount of an ideal gas that had an internal energy of u and a starting temperature of 100 were compressed to half its original volume while maintaining a constant absolute pressure.
What is temperature explain?Temperature is a unit used to represent hotness or coolness on any of a number of scales, include Fahrenheit and Celsius. According to temperature, heat energy will naturally move from a hotter (body with a temperature higher) to a colder (body with a lower temperature) (one at a lower temperature).
What is the unit of temperature?Under the World System of Units, Kelvin, denoted by the letter K, is really the Si derived unit of temperature. In the fields of science and engineering, the Kelvin scale is commonly acknowledged or utilized.
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an electoral system that assigns one seat in a legislative body to represent citizens who live in a district is known as which of the following?
Electors choose from a list of candidates put forth by a party under the most prevalent electoral system, known as party-list proportional representation, which is used in 80 countries.
A method of voting in which the candidate who receives the greatest number of votes in a particular area wins the election, regardless of whether they receive a majority of the vote. The electoral system in which a candidate must receive more than 50% of the vote to prevail. Different majoritarian systems require different types of majorities (simple or absolute), as well as different numbers of representatives to be elected in each electoral district.
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The pressure on a 5.00 L of N₂O decreases from 1.25 atm to 1.00 atm. If the temperature does not change, what will the new volume be?
identify the variables
put the equation that you use
plug in all of the numbers
answer
Considering the Boyle's law, if the temperature does not change, the new volume will be 6.25 L.
Boyle's lawThe gas laws are a set of chemical and physical laws that allow determining the behavior of gases in a closed system. The parameters evaluated in these laws are pressure, volume, temperature, and moles.
Boyle's law is one of the gas laws that relates the volume and pressure of a certain quantity of gas kept at constant temperature.
This law states that the pressure of a gas in a closed container is inversely proportional to the volume of the containert. That is, if the pressure increases, the volume decreases; while if the pressure decreases, the volume increases.
Mathematically, Boyle's law states that the product of pressure and volume is constant:
P×V= k
where P is the pressure and V the volume, being k a constant.
Studying two different states, an initial state 1 and a final state 2, it is satisfied:
P₁× V₁= P₂×V₂
New volumeIn this case, you know:
P₁= 1.25 atm V₁= 5 LP₂= 1 atmV₂= ?Replacing in Boyle's law:
1.25 atm× 5 L= 1 atm× V₂
Solving:
(1.25 atm× 5 L)÷ 1 atm= V₂
6.25 L= V₂
Finally, the new volume will be 6.25 L.
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use the formal charge for each atom in each of the lewis structures given, to predict which one more likely shows the correct connectivity for nof.
Use the formal charge for each atom in each of the lewis structures given, to the one more likely shows the correct connectivity for NOF is
O = N - F.
formal charge for N = O - F
formal charge = valence electrons - non bonding electrons - (1/2) bonding
electrons
formal charge for N = 5 - 4 - (1/2) 4
= -1
formal charge for O = 6 - 2 - (1/2)6
= +1
formal charge for F = 7- 6 - (1/2)2
= 0
formal charge for O = N - F
formal charge for N = 5 - 2 - (1/2)6
= 0
formal charge for O = 6 - 4 - (1/2) 4
= 0
formal charge for F = 7 - 6 - (1/2)2
= 0
Thus, Use the formal charge for each atom in each of the lewis structures given, to the one more likely shows the correct connectivity for NOF is O = N - F because in this structure all atoms have zero formal charge.
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a 24.0 g sample contains 14.6 g cl and 9.40 g b. what is the percent composition of chlorine in this sample?
The percentage of chlorine in this 24.0 g sample, which contains 14.6 g of chlorine and 9.40 g of boron, is 60.83%. Chlorine reacts with organic substances and ammonia, according to its chemical properties (Cl 2 ).
resulting in chloramines or chloro-organics. Chloramines are among the chlorine compounds that exhibit disinfectant capabilities and are detected via a chlorine residue test. When present in wastewater, it serves as a reducing agent.
In this sample, boron makes up 39.17% of the total makeup.
Chlorine weighs 14.60 g in total.
Boron weighs 9.400g in total. Boron is indicated by symbol B.
Sample weight is 24.00 g.
Following are the formulas for calculating chlorine percentage composition:
chlorine content as a percentage = 14.60 / 24 100
proportion of boron is equal to 1460/24.
percentage composition of Boron = 60.833
percentage composition of Boron ≈ 60.83 %
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What are the problems with chemicals exposure?.
The problem with chemical exposure is the weakening of the immune system, cancer, asthma, etc.
Accidents or improper use of chemicals can have immediate health effects like burns, irritation of the skin or eyes, or poisoning.
Chemicals can also have long-term health effects. These typically occur as a result of prolonged exposure to particular chemicals.
Long-term health effects may include, depending on the chemical:
cancer.organ harm.Weakening of the immune systemonset of asthma or allergies.problems with reproduction and birth defects.effects on the body, mind, or intellect in the growth of children.Know more about chemical exposure here: https://brainly.com/question/29553597
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Is the formation of iron rust endothermic or exothermic?.
The formation of iron rust is an exothermic process.
Rusting of iron refers to the formation of rust, which is a mixture of iron oxides, on the surface of iron objects or any other structures. This rust is formed from a redox reaction between oxygen and iron in the environment containing water such as air containing high levels of moisture. The rusting of iron is generally characterized by the formation of a layer of a red, flaky substance that easily crumbles into a powder after some time.
The rusting of iron is basically a gradual burning process. It is very exothermic in nature, however, due to the slowness of the process, the heat generated is lost before producing an actual temperature increase.
However, if the iron is dispersed in microscopic particles so that more of its surface comes into touch with oxygen, and the temperature is raised by rigorous friction at the same time, you can see genuine bright burning of iron.
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calculate the volume in liters of a 0.237 molll potassium permanganate solution that contains 175. g of potassium permanganate
volume of 4.672 L of a potassium permanganate solution that contains 175g of potassium permanganate.
Molarity is the measure of the molar concentration of the chemical species defined to be the number of moles of the solute divided by the volume of the solution. solution of potassium permanganate, KMnO4, is said to have a molarity of 0.237 mole/l . This tells you that every 1 L of this solution will contain 0.237 moles of solute.
Now we have to convert the molarity of the solution moles/liter to grams per milliliter. Molar mass of potassium permanganate is 158.034g/mole.
so, 0.237 moles of potassium permanganate is equals to,
= 0.237 moles KMnO4 . 158.034g / 1 mole of KMnO4
= 37.454 g
so the Molarity of the solution equivalent to the concentration of,
0.237moles of KMnO4 / 1 L solution = 37.454 g KMnO4 / 1l
Potassium permanganate solution contains 175g of potassium permanganate.
=175g KMnO4 . 1l solution /37.454g KMnO4
= 4.672 L solution.
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write balanced equations for the thermal decomposition of potassium nitrate under the following circumstances. (o2 is also formed in both cases.) potassium nitrate, nitrite, and oxide are liquids. include the physical states of reactants and products in the equations.
The required balanced thermal decomposition of potassium nitrate chemical equation is:
2KNO 3(s)→2KNO 2(s)+O2 (g)
Heat causes potassium nitrate to break down into potassium nitrite and oxygen. The crystalline solid potassium nitrate has a color ranging from white to dirty gray. soluble in water. Noncombustible but helps combustible things burn more quickly. An explosion could happen if there is a fire that involves a lot of material or if the material is finely divided. may blow up if exposed to heat or fire for a long time. In fires, toxic nitrogen oxides are created. used in fertilizers, explosives, and solid propellants. Strong oxidizer potassium nitrate, or KNO3, is a crystalline salt that is employed in fertilizer, medicine, and the production of gunpowder.
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Please draw all four bonds at the sp2 carbons and at chiral carbons, including those to hydrogen. Provide the structure for compound B in the given synthesis. Be sure to consider the stereochemistry of the product as well as the mechanism for the reaction of Br2 with compound B when formulating your answer. CH3 NaOCH3 Br2H Br H3C CH3 CH3OH a "2-bromo- 3-methylpentane" enantiomer Synthetic target
An atom-to-atom attraction that enables the synthesis of chemical compounds with two or more atoms.
Chemical bonding is the process through which two or more atoms, molecules, or ions form a chemical link to create a chemical compound. The atoms in the resultant molecule are held together by these chemical bonds. Therefore, it is clear that chemical compounds depend on the strength of the chemical bonds between their constituents; the more stable the resulting molecule, the stronger the bonding between the constituents.
Elimination reaction is carried out on 2-Bromo-3-methyl pentane in the first stage via an E2 mechanism. This results in 2E-3-methylpent-2-ene, product B. B is brominated, and as it passes through an intermediate cyclic bromonium ion, it produces a mixture of enantiomers.
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Which is the formula to add values from cell A2 to cell A10?.
Answer: A12????
Explanation:
What are amino acids and proteins known as?.
Amino acids and proteins are known as: Amino acids are molecules that integrate to form proteins.
A protein molecule is made from a protracted chain of those amino acids, every connected to its neighbor through a covalent peptide bond. Proteins are therefore additionally called polypeptides.
Amino acids, often known as the constructing blocks of proteins, are compounds that play many critical roles in your frame. You need them for vital techniques which include constructing proteins, hormones, and neurotransmitters.
An amino group is a nitrogen atom bonded to 2 hydrogen atoms. A molecule that consists of an amino purposeful institution is called an amine. Amino corporations are sometimes additionally referred to as amine corporations. Amino is a subcategory of amine.
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What information must be included on the label of a container?.
An original chemical container must have an English-language label that is both readable and clear. Along with the manufacturer's name and address.
It must include the chemical or product name as it appears on the SDS. Invalid or missing information on the label should prevent the acceptance of materials. any substance (in the form of an acid) created when two or more other compounds interact with one another or utilized to alter another substance done by manufacturer's.
Chemical container labelling is one of the best and most efficient ways to alert your coworkers about hazards and prevent accidents and injuries.
The downstream consumers of these chemicals must adhere to the labelling requirements on the original container labels, just as chemical manufacturer's are required to do.
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What are the 5 characteristics of covalent compounds?.
Characteristics of covalent compounds are
1. Covalent compounds can be found as soft solids, liquids, or gases.
2. Generally speaking, covalent compounds have low melting and boiling points.
3. Covalent compounds are soluble in organic solvents but insoluble in water.
4. They don't conduct electricity when they're solid, molten, or liquid.
What is Covalent bond ?A chemical bond known as a covalent bond involves the sharing of electrons between atoms to create electron pairs. These electron pairs are referred to as bonding pairs or shared pairs. Covalent bonding is the stable equilibrium of the forces that attract and repel atoms when they share electrons.
In a covalent bond, where the atoms share one or more pairs of valence electrons, a compound is created.Learn more about Covalent bond here:
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How many grams of Na are in Na2O?.
Sodium oxide has a molar mass of 61.97 grammes per mole. Na has a molar mass of 22.9 grammes per mole.
Each element has a unique atomic mass. The atomic mass unit is u. (unified mass). The sum of the atomic masses of all atoms in a molecule, calculated on a scale with hydrogen, carbon, nitrogen, and oxygen atomic masses of 1, 12, 14, and 16, respectively. Water, for example, has a molecular mass of 18 (i.e., 2 + 16) because it contains two hydrogen atoms and one oxygen atom. Also known as molecular weight. similarly, sodium molar mass is 22.9gm/mole in sodium oxide. Molar mass is calculated using grammes per mole (g/mol). The molecular weight of a chemical compound tells us how many grammes there are in one mole of that substance. The formula weight is simply the weight of all the atoms in a given formula in atomic mass units
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Is egg albumen an amino acid?.
The egg albumen contains essential amino acid they are complete source of the protein.
The egg albumen or the egg whites contains all the essential amino acids. they are complete source of a protein. essential amino acid can not be naturally produced by the human being , so they must be taken through the diet. The egg albumen are water source proteins found in the egg white. egg help in the weight loss , it helps us to repairs and build the muscles.
Eggs are high in minerals. egg white contains high levels of vitamin and the minerals. egg white protein is cholesterol and the fat free.
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identify the strongest acid. question 26 options: a) 2.00 m hcl b) 2.00 m hclo c) 2.00 m hcn d) 2.00 m c6h5oh e) 2.00 m hf
The strongest acid is 2.00 m hclo
What are the strong acids?Fluoroantimonic acid, a superacid mixture of antimony pentafluoride and hydrofluoric acid, holds the title of being the strongest of them all.
Here is a list of the chemical formulas for each of the seven strong acids:
Acid chloride: HClO3.Acid hydrobromic: HBr.Acid hydrochloric: HCl.Acid hydroiodized: HI.HNO3, or nitric acid.Acid perchloric: HClO4.H2SO4 is sulfuric acid.Element 118, sometimes known as oganesson, is the heaviest element in terms of atomic weight. Osmium or iridium has the highest density of all elements. The most dense element fluctuates depending on the circumstances because density is dependent on temperature and
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a 2o amine reacts with a ketone or aldehyde under mildly acidic conditions to give an enamine. organize the steps that follow initial carbinolamine formation in the correct order, starting with the first step at the top of the ilst.
The OH group being protonated Getting rid of water the old alpha carbon atom undergoes deprotonation.
An amine's ingredients:Amines are organic substances that have a lone pair of nitrogen atoms in them. In essence, they are produced by replacing one or even more hydrogen atoms in ammonia (NH3) with an alkyl or aryl group, giving them the names alkylamines and arylamines, respectively.
What sort of substance is an amine?come to m Organic molecules, biologically active aldehydes, trimethylamine, and phenol are examples of essential amines; for such a list of amines, see Class: Amines. Amines are a different name for inorganic ammonia compounds, including monochloramine (NClH2). The amino group is denoted by the substituent -NH2.
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Consider a system made up of 5 sub-systems A, B, C, D, and E that are in thermal contact with each other and isolated from the surroundings. The sub-systems were all initially at different temperatures, but after a redistribution of heat among these sub-systems, thermal equilibrium was established and all sub-systems had the same temperature. The following is a description of the heat flow with respect to sub-systems A, B, C and D:Sub-system A lost 7 kJ of heatSub-system B gained 4 kJ of heatSub-system C lost 1 kJ of heatSub-system D gained 3 kJ of heatWhat happened to sub-system E?
Sub-system E gained 1kJ of heat. Heat is the result of the movement of kinetic energy within a material or an item, or from an energy source to a material or an object.
What is heat ?The exchange of "thermal" energy brought on by a temperature differential is known as heat. Think of an isolated system with two subsystems that are initially operating at two distinct temperatures. The higher temperature subsystem 2 transfers energy to the lower temperature subsystem 1.The measured amount of energy is designated by the letter q. This process happens on its own, and we have all encountered its basic characteristics. The opposite process, which involves a spontaneous energy transfer between two subsystems that are initially at the same temperature and results in a difference in temperature, never happens.From the equation
qA + qB + qC + qD + qE = 0
we can solve to get
qE = -(qA + qB + qC + qD)
Reading through the problem , we can make the following variable assignment :
qA = -7 KJ
qB = 4 KJ
qC = -1 kJ
qD = 3 kJ
substituting these values into the equation , we have
qE = -((-7kJ ) + 4kJ + (-1kJ) + 3kJ) = -(-1kJ) = 1kJ
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Calculate the solubility of PbCO3 in water at 25 degree C. You'll find Ksp data in the ALEKS Data tab. Round your answer to 2 significant digits.
The solubility of PbCO3 in water at 25 degree C. You'll find Ksp data in the ALEKS Data tab is 0.726 x10^-four g/L.
Here Ksp = 7.four x 10-14s^2 = 7.four x 10-14s= 2.seventy two x10^-7 mole/Ls =267.20 x 2.seventy two x10^-7 g/L = 0.726 x10^-four g/LSolubility is the new bond formation between the solute molecules and solvent molecules. In terms of quantity, solubility is the maximum concentration of solute that dissolves in a known concentration of solvent at a given temperature.
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the student is now told that the four solids, in no particular order, are aluminum chloride ( alcl3 ), sugar ( c6h12o6 ), butanoic acid ( c3h7cooh ), and potassium bromide ( kbr ). assuming that conductivity is correlated to the number of ions in solution, rank the four substances based on how well a 0.20 m solution in water will conduct electricity.
In order of conductivity, calcium bromide, potassium bromide (KBr), benzoic acid, and sugar are the least conductive materials. Benzonic acid, Ca2Br KBr C6H5COOH, and C6H12O6 (sugar).
How is electrical conductivity tested?You can test a material by inserting something between the wire's two free ends. Put the free end of the wire on one side of the object and the other end on the other side. The substance is conductive if the bulb illuminates; otherwise, it is an insulator.
How can copper wire's conductivity be determined?The opposite of resistivity, which is defined as resistance times cross-section area divided by length, is conductivity. Consequently, measure the length and resistance using a micro-ohmmeter.
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suppose you had molecular oxygen (o2) chilled enough so that it was in liquid form. which of the following best describes the phase changes that would occur as you heated the liquid oxygen to high temperature?
It would evaporate into a gas, then the molecules would dissociate into individual oxygen atoms, then the atoms would become increasingly ionized as you continued to raise the temperature.
What ionize?Converting (an atom, molecule, or substance) into an ion or ions, typically by removing one or more electrons is known as ionize.
What is an ion?An ion is an atom or group of atoms that has an electric charge. Ions with a positive charge are called cations. Ions with a negative charge are called anions. Many normal substances exist in the body as ions.
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Are there 18 nonmetals in the periodic table?.
There are 18 nonmetals on the Periodic table. All these nonmetals are located in the upper right corner of the Periodic table (Hydrogen is located in the left top corner).
The nonmetal elements are the least efficient heat and electric current conductors and have the highest degree of fragility. They are above the broken line connecting groups 14 to 17 to the right of the periodic table, and they include hydrogen. In the accompanying illustration, they were highlighted in yellow. Only a small percentage of the elements on the periodic table are non-metallic. Non-metals are located on the periodic table to the right of the zigzag line that connects the elements astatine, boron, silicon, arsenic, tellurium, and tellurium. Hydrogen is a non-metal that is situated to the left of metalloids.
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What are examples of carbon emissions?.
Scope 1 emissions include things like gas stoves and personal vehicles. Scope 2 emissions include things like businesses that produce carbon emissions but also buy power.
Exhaust gas, also referred to as vehicle emissions, can contain a variety of pollutants and greenhouse gases. Flue gases, which are released through the plant's smokestack, are also produced by power plants that burn fossil fuels, such as coal-fired power plants or natural gas power plants. They are similar to exhaust gases in composition. Having the chemical symbol C and atomic number 6, carbon is an element with the meaning "coal" in Latin. It is nonmetallic and tetravalent, meaning that four of its atom's electrons can be used to create covalent chemical connections. Is called as carbon.
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Using carbon skeletal notation, write the dehydration-condensation reaction that occurs between ethanol and butanoic acid.
Ethyl butanoate is produced when butanoic acid and ethanol combine.
What ester does butanoic acid and ethanol make?When ethyl butanoate, with the chemical formula C6H12O2, and water are treated with butanoic acid, with the chemical formula C4H8O2 and carboxylic acid as functional groups, respectively, in the presence of an acid catalyst.Ethyl butanoate is produced when butanoic acid and ethanol combine. As per IUPAC regulations, the name of the alkyl chain that was the alcohol before to the reaction comes first when naming an ester. It is ethyl in this instance.The carbon skeletal notation for the given reaction is shown ( find the attachment)
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What are the adaptations of the gas exchange system?.
Moist walls: Gases dissolve in the moisture, which makes it easier for them to cross the gas exchange surface. Gases can travel through walls that are permeable.
Describe what gas is.A gas is a sample of matter that, in spite of gravity and independent of the volume of the container in which it is held, conforms to the shape of the container in which it is held and generates a uniform density inside the container.
What is the reason behind the increase in petrol prices?According to major oil-producing countries Saudi Arabia and Russia, there will be a 2 million barrel per day decrease in oil production. Americans will eventually pay for that decision when they fill up their petrol tanks.
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