Learn more about distillation and condensation process.
What is distillation?
Distillation is a process in which a liquid is transformed into a vapor and then condensed back into a liquid state. The simplest illustration of it is when distilled water drops are left on a chilly surface after being deposited as steam from a kettle.
What is condensation?
The process by which matter transitions from its initial gaseous form into its liquid state is known as condensation. For instance, condensation happens when airborne water vapor (in its gaseous form) makes the transition to liquid water upon coming into contact with a cooler surface.
Given density of isoamyl acetate = 0.88g/ml
volume of isoamyl acetate = 75 ml
MW of isoamyl acetate = 130.2g/ml
Therefore, no.of moles =mass/ molar mass
and mass = density*volume
Therefore, no.of moles = density*volume/molar mass
= 0.88g/ml*75 ml/130.2g/ml
=0.55 moles
similarly for methyl benzoate
no. of methyl benzoate = 1.09g/ml*115ml/136.2gml
=0.92 moles.
Boiling point of isoamyl acetate = 142°c (vaporize first)
Boiling point of methyl benzoate= 199.6°c (moves down)
mole fraction of isoamyl acetate = 0.51/0.57+0.92
=0.357
mole fraction of the methyl benzoate = 0.643
%of isoamyl acetate= 35.7%
%of methyl benzoate= 64.3%
mole ratio= 35.7:64.3
Initial boiling point 166°c
composition of vapor in equilibrium with liquid 75: 25 (using theoretical plate1)
↓ ↓
IA MB
Re vaporization at 145°c
composition of vapor, at 145°c
95:5 ( using theoretical plate 2)
↓ ↓
IA MB
Condensate⇒ low density mixture
% composition of Condensate= 95%
(IA) using two theoretical plates
Therefore, Condensate is 95%
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an element e has the electron configuration [kr] 5s24d105p3. the formula for the hydride of e is most likely
The formula oh Hydride of of antimony is H3Sb.
Hydrides is the hydrogen anion with the the formula H-.It is the binary compound of the hydrogen with other elements .In this Hydrogen is covalently bonded. this is bonded to a less electronegative element. This only exists in extrema condition. This consist of two electrons and a proton. Electronic configuration of hydride is 1S2.
[Kr]5s24d105p3 is antimony.
The formula of hydride in antimony is SbH3.This is a colorless gas and it is highly toxic. This is the main covalent hydride of antimony. This is also known as antimony hydride or hydrogen antimonite. This is the binary compound of Hydrogen with antimony.
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What would a student need to know in order to figure out a formula for compound containing a group 16 nonmetal?.
"Will group 16 elements gain electrons to bond with group 2 in an XY format in periodic table would a student need to know in order to figure out a formula for compound containing a group 16 nonmetal.
From one side of the periodic table to the other, properties of elements within a period vary in a predictable manner. A horizontal row represents a period in the periodic table. The number of electron shells is the same for every atom in a row. Moving through a period causes elements to acquire electrons and protons and become less metallic. -Elements in the same period have the same number of electron shells.
As the atomic number rises, comparable features reoccur on a regular basis, which is reflected in this arrangement. From one side of the periodic table to the other, properties of elements within a blank shift in a predictable manner. those with comparable qualities are displayed in a column.
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The half life of radium-226 is 1602 years. If you have 500 grams of radium today how many grams would have been present 9612 years ago?
The initial mass present is 32000 g.
What is the mass of the radium-226?We know that the half life is the time that is taken for only half of the number of the original radioactive atoms to remain. Now, we have been told in the question that the half life of the atom is 1602 years.
Now we have;
N/No = (1/2)^t/[tex]t_{\frac{1}{2} }[/tex]
N = Number of atoms at time t
No = Number of atoms originally present
t = time taken
[tex]t_{\frac{1}{2} }[/tex] = Half life of the sample
Now;
500/No = (1/2)^9612/ 1602
500/No = (1/2)^6
No = 500/(1/2)^6
No = 32000 g
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.400 moles of CO2 gas are confined in a 5.00-liter container at 25 °C. Calculate the pressure exerted in atmospheres and mm Hg.
The pressure exerted by 0.400 moles of carbon dioxide in a 5.00 Liter container at 25 °C would be 1.9563 atm or 1486.788 mm Hg.
The ideal gas lawAccording to the ideal gas law, the product of the pressure and volume of a gas is a constant.
This can be mathematically expressed as:
pv = nRT
Where:
p = pressure of the gas
v = volume
n = number of moles
R = Rydberg constant (0.08206 L•atm•mol-1K)
T = temperature.
In this case:
p is what we are looking for.
v = 5.00 L
n = 0.400 moles
T = 25 + 273
= 298 K
Now, let's make p the subject of the formula of the equation.
p = nRT/v
= 0.400 x 0.08206 x 298/5
= 1.9563 atm
Recall that: 1 atm = 760 mm Hg
Thus:
1.9563 atm = 1.9563 x 760 mm Hg
= 1486.788 mm Hg
In other words, the pressure exerted by the gas in atm is 1.9563 atm and in mm HG is 1486.788 mm Hg.
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solid aluminum and oxygengas react to form solid aluminum oxide. suppose you have 7.0 mol of al and 11.0 mol of o2 in a reactor. calculate the largest amount of that could be produced. round your answer to the nearest .
The largest amount of Al₂O₃ produced from the reaction is 3.5 moles
What are limiting reactants?
A reactant that is completely consumed at the end of a chemical reaction is known as the limiting reagent. This reagent regulates the amount of product produced because the reaction cannot proceed without it.
Finding the limiting reactant,
4Al + 3O₂ —> 2Al₂O₃
From the balanced equation above,
4 moles of Al reacted with 3 moles of O₂.
Therefore,
7 moles of Al will react with = (7 × 3)/4 = 5.25 moles of O₂
From above, only 5.25 moles of O₂ out of 11 moles given, is needed to completely react with 7 moles of Al.
Therefore, Al is the limiting reactant and O₂ is the excess reactant.
Now, the largest amount of Al₂O₃ produced from the reaction. This can be obtained by using the limiting reactant as shown below
From the balanced equation above,
4 moles of Al reacted to produce 2 moles of Al₂O₃.
Therefore,
7 moles of Al will react to produce = (7 × 2)/4 = 3.5 moles of Al₂O₃.
Thus, the largest amount of Al₂O₃ produced from the reaction is 3.5 moles
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What is the oxidation state argon
Answer: Possible oxidation states are 0.
redox reactions occur spontaneously because . multiple choice question. atoms of different elements have different tendencies to gain and lose electrons atoms of different elements have different tendencies to gain and lose protons the products of redox reactions are not soluble in water
redox reactions occur spontaneously because atoms of different elements have different tendencies to gain and lose electrons
Redox reactions are oxidation-reduction chemical reactions in which the reactants undergo a change in their oxidation states. The term ‘redox’ is a short form of reduction and oxidation. All the redox reactions can be broken down into two different processes that is a reduction process and an oxidation process.
The oxidation and reduction reactions always occur simultaneously in redox or Oxidation-Reduction reactions. The substance that are getting reduced in a chemical reaction is known as the oxidizing agent, while a substance that is getting oxidized is known as the reducing agent.
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write the complete electron configuration for the common monatomic ion formed by the element rubidium , rb . this ion is a(n) with a charge of fill in the blank 3 .
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s1 electron configuration for the common monatomic ion formed by the element rubidium , Rb.
The shape and energy of an atomic species' electrons may be understood by looking at its electron configuration, which is the accepted nomenclature for describing an atom's electronic structure, whether it be neutral or ionic. We allow each electron to occupy an orbital under the orbital approximation, which can be solved by a single wavefunction. By doing this, we are able to produce the identical three quantum numbers (n, l, and ml) that were produced when Schrodinger's equation for Bohr's hydrogen atom was solved.
The Aufbau Principle, Hund's Rule, and Pauli-Exclusion Principle are three broad guidelines for determining the electron configuration of an atomic species.
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calculate the ph of a solution prepared by mixing 0.0750 mol of chloroacetic acid plus 0.0180 mol of sodium chloroacetate in 1.00 l of water.
When 0.0750 mol of chloroacetic acid and 0.0180 mol of sodium paients are combined with 1.00 l of water, the resulting solution has a pH of 2.373.
Chloroacetic is why?Stronger than acetic acid CH3-COOH is chloroacetic acid Cl-CH2-COOH. Cl is a group that removes electrons. By dispersing negatively charged by an inductive effect and stabilising the acetate anion, it makes acetic acid more acidic.
Chloroacetic acid is more, why?In chloroacetic acid, the Cl- ion has a -I effect that lowers the electron of the carboxylic group's O-H bond, whereas in acetic acid, the CH3 group has a +I impact that raises the O-H bond's electron density. Consequently, acetic acid is less acidic than chloroacetic acid.
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If you forgot to add the primers to your pcr reaction, what would happen and why?.
Learn PCR reaction and primer.
What is PCR?
A specific DNA segment can be quickly multiplied (amplified) into millions or billions of copies using the polymerase chain reaction, also known as PCR, so that it can be further examined in the lab.
What is primer?
A substance used as a primer coat on previously unpainted wood, metal, or canvas, especially to stop the absorption of additional layers of paint or the growth of rust.
Taq polymerase cannot add bases in the absence of a small amount of DNA, so your reaction would not succeed. Because there wouldn't be an enzyme that could add new nucleotide bases, your reaction would fail.
Therefore, your reaction would not succeed. Because there wouldn't be an enzyme that could add new nucleotide bases, your reaction would fail.
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Question 1 (1 point)
Which of the following statements correctly describes the relationship between the
reactants and the products of a chemical reaction?
The total mass of the reactants must be less than the total mass of the products.
Products and reactants always have the same physical and chemical states.
Products always have a different physical and chemical state than reactants.
The total mass of the reactants must equal the total mass of the products.
Answer: A The total mass of the reactants must equal the total mass of the products.
Explanation:
How do you calculate the actual yield if the percent yield isn’t given, but only the theoretical yield is given?
The actual yield cannot be calculated if the only theoretical yield is given.
Percent yield can be computed by dividing actual yield by theoretical yield. So in order to compute the unknown value 2 known values are to be given.
So, to find the actual yield, the values of percent yield and theoretical yield is to be known. If these two values are known then, the actual yield could be computed by-product of theoretical yield and percent yield.
This could be mathematically given as,
Percent yield = Actual yield/Theoretical yield
Actual yield = Percent yield x Theoretical yield
Therefore, without the percent yield value, the value of the actual yield cannot be computed if the only theoretical yield is given.
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What mass of water is needed to prepare a 1.20 molal solution using 0.60 mol propyleneglycol?
To produce a 1.20 molarity solution with 0.60 mol propylene glycol, 0.5 kg volume of water is needed.
What exactly is polypropylene glycol and how does it work?A synthetic liquid material that absorbs water is called propylene glycol. Additionally, polyester compounds and the foundation for deicing solutions are made with propylene glycol. When a leak could result in contact with food, the chemicals, food, and pharmaceutics utilize propylene glycol as an antifreeze.
Must you stay away from propylene glycol?The majority of processed foods include propylene glycol in some amount. Despite its low toxicity, eating a lot of foods that contain it can have negative effects on your health. Avoiding goods that contain the chemical is the greatest defense. Instead
Briefing:M: 1.20
moles: 0.60
Kg:?
(m)(kg)/(m)= 0.60/1.20= 0.5Kg
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Combusting an unknown hydrocarbon produces 5 mol co₂ and 6 mol h₂o. What is the empirical formula of the hydrocarbon?.
C5H12 is the empirical formula of the hydrocarbon .
What are Hydrocarbons ?
Hydrocarbons are type of organic chemical compounds composed only of the elements carbon (C) and hydrogen (H). Carbon atoms bond to form the skeleton of a compound, and hydrogen atoms bond to it in various configurations. Hydrocarbons are the components of oil and natural gas. They are used not only as fuels and lubricants, but also as raw materials for plastics, textiles, rubber, solvents, explosives and industrial chemicals.
Many hydrocarbons exist in nature. Not only do they form fossil fuels, they are also present in trees and plants. For example, it exists in the form of pigments called carotenes found in carrots and green leaves.More than 98% of raw natural rubber is a hydrocarbon polymer, a chain-like molecule with many units attached. The structure and chemical properties of individual hydrocarbons are highly dependent on the type of chemical bond that connects the constituent atoms.
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A 345. g sample of an unknown substance was heated from 45.0°C to 167.7°C. In the process, the substance absorbed 18.942 kJ of energy. What is the specific heat of the substance? Give your answer in both standard and scientific notation.
Was this an endothermic or exothermic process?
The specific heat capacity of the subtance of mass 345 g is 447.47 J/kgK. And the process is exothermic.
What is specific heat capacity?The specific heat capacity is defined as the quantity of heat (J) absorbed per unit mass (kg) of the material when its temperature increases 1 K (or 1 °C), and its units are J/(kg K) or J/(kg °C).
To calculate the specific heat capacity of the susbtance, we use the formula below.
Formula:
c = Q/(mΔt)......... Equation 1Where:
c = Specific heat capacity of the substancem = Mass of the substanceΔt = Change in temperature.Q = Quantity of heatFrom the question,
Given:
m = 345 g = 0.345 kgΔt = (167.7-45) = 122.7 °CQ = 18.942 kJ = 18942 JSubstitute these values into equation 1
c = 18942/(122.7×0.345)c = 447.47 J/kgK.Since the process absorb heat, it is endothermic.
Hence, the specific heat capacity of the subtance is 447.47 J/kgK. And the process is endothermic.
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A process that is approaching equilibrium will have a ______ δsuniv value.
A process that approaching equilibrium will have a constant universal value.
Equilibrium constant value is the ration of the concentration of the product over reactant. we can use the value of K to predict whether the reactant and product of the reaction are at equilibrium or not. When a reaction approach equilibrium both the forward and reverse reaction are occuing. At equilibrium, the foreward and reverse reaction are at the same rate. That means when the has reached a point where the concentration of the reactant and product remains unchanged with time. It is because both the reaction have same rate. The value of the equilibrium is the ratio of the concentration of the product over the reactant.
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At STP, 5.6 liters of CH4 contains the same number of molecules as
1.4 L of oxygen
2.8 L of ammonia
5.6 L of hydrogen
11.2 L of neon
5.6 L of [tex]CH_{4}[/tex] contains the same number of molecules 5.6 L of [tex]H_{2}[/tex].
Define mole.
The mole is always the SI unit used to measure a substance's quantity.
Define molecules.
The smallest particle of a substance. It contains 2 or more atoms.
5.6 L of [tex]CH_{4}[/tex]:
No of moles=Given volume/molar volume
= [tex]5.6/22.4[/tex]
= [tex]0.25[/tex]
No of molecules=No of moles*Avagadro's number
= [tex]0.25*6.023*10^{23}[/tex]
= [tex]1.51*10^{23}[/tex]
5.6 L of [tex]H_{2}[/tex]:
No of moles=Given volume/molar volume
= [tex]5.6/22.4[/tex]
= [tex]0.25[/tex]
No of molecules = No of moles * Avagadro's number
= [tex]0.25*6.023*10^{23}[/tex]
= [tex]1.51*10^{23}[/tex]
Therefore, the answer is 5.6 L of [tex]H_{2}[/tex].
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The gallium in the image is melting in the person's hand. Which
changes will occur on a microscopic level?
O The gallium atoms will gain potential energy, moving
freely from each other.
O The gallium atoms will increase in temperature,
O The gallium atoms will be moving faster on average.
O The gallium atoms will gain kinetic energy.
The gallium in the image is melting in the person's hand changes will occur on a microscopic level is the gallium atoms will increase in temperature at its melting point
The melting point also called as liquification is the process by which the solid substances turn into liquid upon giving heat energy and there is equilibrium established between the solid and liquid phase during melting of a substances and the gallium metal has low melting point and upon touching a person hand the atom heat up and there is increase in temprature which is enough to melt it and atom heat up and liquify as it reaches its melting point
Therefore when the gallium metal is kept on a person hand the atom heat up and melt upon reaching its melting point
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1) Aluminum is...
a) An element composed of atoms.
b) An element of diatomic molecules.
c) An ionic compound.
d)A covalent compound (composed of molecules made
from more than one type of atom)
Answer:
a) An element composed of atoms.
Explanation:
Ionic compounds are compounds composed of ions, charged particles that form when an atom. (or group of atoms) gains or loses electrons,There may or may not be more than one of each element. A diatomic compound (or diatomic molecule) contains two atoms, which may or may not be the same.
PLEASE GIVE BRAINLIEST THANK YOU!!!
Answer:
There may or may not be more than one of each element. A diatomic compound (or diatomic molecule) contains two atoms, which may or may not be the same.Ionic compounds are compounds composed of ions, charged particles that form when an atom. (or group of atoms) gains or loses electrons.
Explanation:
d)A covalent compound (composed of molecules made
from more than one type of atom)
if 100. ml of 0.100 m na2so4 is added to 200. ml of 0.150 m nabr, what is the concentration of na ions in the final solution? assume that the volumes are additive.
The concentration of sodium ion in the final solution containing 100 ml of 0.100 m Na₂SO₄ and 200 ml of 0.150 m NaBr is 0.167 M.
The concentration of Na₂SO₄ is given as 0.100 M. So it is clear that 0.100 mol of Na₂SO₄ is present in 1 L of solution.
One mole of Na₂SO₄ contains 2 moles of Na⁺ ions and one mole of SO₄²⁻ ion.
Therefore, the concentration of Na⁺ ion can be calculated as follows:
Concentration of Na⁺ ions (M₁) = 2×0.100 M
= 0.2 M
Volume of Na₂SO₄ (V₁) = 100 mL
Similarly, 0.150 M NaBr is taken, which implies that 0.150 moles of NaBr are present in 1 L of solution.
One mole of NaBr contains 1 mole of Na⁺ ions and one mole of Cl⁻ ion.
Therefore, the concentration of Na⁺ ion (M₂) = 0.150 M
Volume of NaCl (V₂) = 200 mL
It is known that, M₁V₁ + M₂V₂ = MV
Where V is the total volume of solution, that is 100 mL+200 mL = 300 mL and M is the concentration of Na⁺ ion in the final solution. Equating values of M₁, V₁, M₂, and V₂ in the above equation is as follows:
0.2 M×100 mL +0.150 M×200 mL = M×300 mL
⇒M=0.2 M × 100 mL + 0.150 M × 200 mL/ 300 mL
⇒M= 0.1666 M
⇒M=0.167 M
Hence, the concentration of Na⁺ ion in the final solution is 0.167 M.
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How many protons for the si silicon atom
Answer:
Silicon has 14 protons in its atoms.
Ionic compounds that use neon
An ionic compound that uses neon is that neon does not easily form ionic compound because neon belongs to noble gases and they are extremely stable and their reactivity is practically nil.
Neon is belongs to group 18 which is noble gases. noble gases have 8 valence electron in the outer most shell and that follow the octet rule. noble gases are extremely stable in the periodic table. so, they are very less reactive or we can say that non reactive gases.
Thus, An ionic compound that uses neon is that neon does not easily form ionic compound because neon belongs to noble gases and they are extremely stable and their reactivity is practically nil.
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How many total ions would be present in the formula for indium fluoride?
The total ions which would be present in indium fluoride is +2
How indium fluoride has a total ions of +2It follows that indium is an element which has an ion of +3 while fluorine has +1 ion. So therefore, adding these two ions together in the formula of this compund indium fluoride is given below:
+3 + (-1)
= +3 - 1
= +2
That being said, this indium fluoride has a number of properties. Some of it few properties are as follows:
It is a solid substance It is an inorganic compoundIt is whitish in appearanceIts chemical formula is written as InF3.In conclusion, it can be deduced from the explanation above that indium fluoride is a compound.
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explain why the use of glycerol (1,2,3-propanetriol) in lotions helps retain water and keep the skin moist.
The use of glycerol in lotions helps retain water and keep the skin moist because it is hygroscopic compound
Hygroscopic compounds which are also known as water loving compounds, which are able to attract or hold the water from the environment, either through absorption or adsorption. Many react chemically with water such as metal hydrides or alkali metals.
One of the main application of these compounds was in absorption cycles that were used in the refrigerators.
In glycerol the presence of 3OH groups in it make is more hygroscopic in nature and therefore when we use glycerol's in the lotions, it helps retain the water in it because it now attracts water and hence keeps the skin moist.
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3. Hydrogen fuel cells are used on the space shuttle. These cells run on hydrogen ions,
hydrogen gas and oxygen gas.
a) Write two most likely half reactions, and net reaction that will take place in the hydrogen
fuel cell.
b) Calculate the electric potential difference for this reaction. (show all work)
Fuel cell automobiles use hydrogen gas to electricity an electric powered motor. Unlike traditional automobiles which run on gas or diesel, gas cell motors and vehicles integrate hydrogen and oxygen to supply electricity, which runs a motor.
The gas cell electricity plants generate warmth and water as by-merchandise of electrical electricity generation. The extra warmth is directed to gas cell warmth exchangers, in which the extra warmth is rejected to Freon coolant loops. The water is directed to the potable water garage subsystem.
Liquid Hydrogen (LH2) Rocket Fuel.
The Saturn rockets used it for his or her secondary degree engines. Later the NASA area commute could use it to electricity its 3 most important rocket engines. Liquid hydrogen gas has many benefits, consisting of its low molecular weight and excessive power output whilst burned collectively with liquid oxygen.
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Sodium is not a product of the electrolysis of sodium chloride solution because it is more __________ than hydrogen. What word completes this sentence?
Sodium is not a product of the electrolysis of sodium chloride solution because it is more reactive than hydrogen.
What is electrolysis?Electrolysis is the decomposition of a substance in a molten or solution form when a direct current is passed through it.
A substance in a molten state or a solution that allows electric current to pass through it is known as an electrolyte.
During electrolysis, the ions in the solution of molten gain or lose electrons to become discharged as neutral atoms.
The ability of ions to be discharged during electrolysis depends on the position of the ion in the electrochemical series as well as on the concentration of the ions. Reactive ions are not easily discharged during electrolysis.
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Which of the samples shown contains a mixture?
Answer:
D.
Explanation:
The molecules shown are different, they are also not combined which means a mixture is shown.
Mixture is defined as when two or more than two components are mixed together. The samples shown contains a mixture is option D.
What is mixture ?A substance made up of two or more separate chemical compounds that are not chemically linked is referred to as a mixture. When two or more substances are physically combined, their identities are maintained, and the mixture takes the shape of solutions, suspensions, or colloids.
A substance made up of two or more separate chemical compounds that are not chemically linked is referred to as a mixture. When two or more substances are physically combined, their identities are maintained, and the mixture takes the shape of solutions, suspensions, or colloids.
When two or more distinct substances physically join, a mixture is produced that can be dispersed back into its constituent parts.
Thus, option D is correct.
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Draw the structure of the major organic product formed in the reaction of 1−methylcyclohexene with bromine in water.
The major organic product formed in the reaction of 1−methylcyclohexene with bromine in water is attached as a picture.
A reaction mechanism is a representation of step by step transfer of electrons and molecules from one compound to another compound. In reaction mechanisms, the curved arrows show the moment of electrons.
In the reaction mechanism of 1-methyl cyclohexene the double bond of 1-methyl cyclohexene act as an attacking group and attacks Br2. As a result, one Br atom gets attached to 1-methyl cyclohexene. This results in a carbocation generation on the carbon having the methyl group. This carbon cation then attacks the oxygen of water molecules and (1S,2S)-2-bromo-1-methylcyclohexan-1-ol will generates as the major product.
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polypeptides are continuously being formed and degraded. one of these processes is shown. the figure presents the molecular structures of polypeptides. a molecule at the top of the figure has a backbone with six repeats of the following atoms: n, c, c. one r group, of the range r 1 through r 6, is bonded with the first c of each the n, c, c repeats. an arrow that is joined by another arrow labeled h 2 o points to two shorter molecules, each with only three repeats of the atoms: n, c, c. one of the shorter molecules has r groups r 1, r 2, and r 3. the other molecule has r groups r 4, r 5, and r 6. figure 1. polypeptide reaction which statement is the most accurate description of the reaction shown in figure 1?
It represents a polypeptide chain that is broken down through a hydrolysis reaction.
The backbone of DNA contains deoxyribose while the backbone of RNA contains ribose. A covalent bond is formed between the carbon and nitrogen atoms to form H2OH2O. The hydrophilic phosphate groups of phospholipid molecules are attracted to the aqueous internal and external environment.
The shape and charge of the substrate match the active site of the enzyme. Because the substitution reduced the mass of the enzyme, the mutant enzyme bound the substrate more weakly than the normal enzyme. There is no visible effect on the structure of the CFTR protein. It leads to the synthesis of proteins that aid in cell replication. DNA is usually double-stranded, with both strands oriented parallel, whereas RNA is usually single-stranded.
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Disclaimer:- Your question is incomplete,please see below for the complete question.
polypeptides are continuously being formed and degraded. one of these processes is shown. the figure presents the molecular structures of polypeptides. a molecule at the top of the figure has a backbone with six repeats of the following atoms: n, c, c. one r group, of the range r 1 through r 6, is bonded with the first c of each the n, c, c repeats. an arrow that is joined by another arrow labeled h 2 o points to two shorter molecules, each with only three repeats of the atoms: n, c, c. one of the shorter molecules has r groups r 1, r 2, and r 3. the other molecule has r groups r 4, r 5, and r 6. figure 1. polypeptide reaction which statement is the most accurate description of the reaction shown in figure.
A piece of iron (specific heat, 0.444 J/g•°C) is added to 109.92 grams of water (specific heat, 4.184 J/g•°C) in a calorimeter. The water was initially at a temperature of 26.3°C and the iron was initially at 125°C. If the final temperature of the system is 34.9°C, what is the mass of the iron
The mass of the piece of iron is 98.87grams.
How to calculate mass in a calorimetry procedure?Calorimetry is the science of measuring the heat absorbed or evolved during the course of a chemical reaction or change of state.
The calorimetry equation to evaluate the energy required or released is as follows:
Q = mc∆T
Where;
Q = amount of energy in Joulesm = mass (g)c = specific heat capacity∆T = change in temperatureHowever, since two materials are involved, the following applies;
mc∆T (water) = - {mc∆T} (metal)
109.92 × 4.184 × (34.9 - 26.3) = - {m × 0.444 × (34.9 - 125)}
3,955.18541 = 40.0044m
m = 98.87grams.
Therefore, 98.87 grams is the mass of the iron metal.
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