All possible types of intermolecular forces that can form between particles of :
(a) CS2: London dispersion forces
(b) CH2Br2: Dipole-dipole interaction and H-bonding
What are intermolecular forces?
Intermolecular forces, frequently abbreviated to IMF, are the appealing and repulsive forces that stand up among the molecules of a substance. These forces mediate the interactions among man or woman molecules of a substance. Forces additionally exist among the molecules themselves and those are together called intermolecular forces. Intermolecular forces are specifically answerable for the bodily traits of the substance. There are 5 varieties of intermolecular forces. They are as follows-
Dipole-Dipole InteractionsIon-Dipole InteractionsIon Induced Dipole InteractionsDipole Induced Dipole InteractionDispersion Forces or London ForcesThus, al the types of intermolecular forces possible between particles of :
(a) CS2: London dispersion forces
(b) CH2Br2: Dipole-dipole interaction and H-bonding
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According to the law of multiple proportions, if 12 g of carbon combine with 16 g of oxygen to form co, the number of grams of carbon that combine with 16 g of oxygen in the formation of co2 is ________.
The amount of carbon combined with oxygen in order to form Carbon Dioxide(CO₂) is 12 grams
The Law of Multiple proportions is one of the basic laws in chemistry along with the Law of Definite proportion. This law was proposed by John Dalton in 1803. The law states that if two elements react to form one or more compounds then the ratio of masses of both the elements is in the ratio of small whole numbers.
It is known that Carbon can form two different compounds while reacting with Oxygen that is: Carbon Monoxide, Carbon Dioxide. For Carbon Monoxide, 12g of Carbon needs to react with 16g of Oxygen. Whereas, In Carbon Dioxide, 12g of Carbon needs to react with 32g of Oxygen. So the mass of Carbon is equal in both cases is 12g.
C(12g) + O(16g) ⇒ CO (Carbon Monoxide)
C(12g) + 2O(32g) ⇒ CO₂ (Carbon Dioxide)
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Why can't a cell stop normal processes during interphase
starting from methyl acetoacetate and any other necessary reagents, complete the most efficient three‑step synthesis of the ketone, 3‑benzyl‑5‑methylhexan‑2‑one, by dragging the appropriate compound(s) into the boxes. only one set of reagents will fit into each box, and all compounds will not be used
starting from methyl acetoacetate and any other necessary reagents, complete the most efficient three‑step synthesis of the ketone, 3‑benzyl‑5‑methylhexan‑2‑one
What are chemical conversions?
A chemical production procedure in which chemical transformation takes place, that is, the product differs chemically from the beginning materials.
Acetoacetate is transformed into BHB, the wealthy supply of strength for the mind. This system of changing fatty acids to ketone our bodies is crucial due to the fact your mind isn't capable of successfully use fatty acids for fuel. Ketones, however, can pass the blood-mind barrier and offer your mind with the strength it desires to function.
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_______ botulinum produces a deadly toxin that may be found in improperly home-canned, low-acid foods.
Clostridium botulinum produces a deadly toxin that may be found in improperly home-canned, low-acid foods. Under low oxygen circumstances, the bacterium Clostridium botulinum creates harmful toxins (botulinum toxins). Botulinum toxins are among the deadliest chemicals yet discovered. Botulinum toxins can cause respiratory and muscle paralysis by blocking nerve functioning.
A toxin that targets the body's nerves and produces botulism, an uncommon but severe illness, can cause difficulties breathing, muscle paralysis, and even death. The bacteria Clostridium botulinum, as well as Clostridium botulinum and Clostridium baratii, occasionally produce this toxin. The anaerobic rod-shaped spore-forming bacteria Clostridium botulinum produces a protein with distinctive neurotoxicity.
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calculate the ph of a solution prepared by diluting 3.0 ml of 2.5 m hcl to a final volume of 100 ml with h2o
The pH of a solution prepared is 1.12.
c₁(HCl) = 2.5 M; original concentration of the solution of hydrochloric acid (HCl), before it gets diluted
V₁(HCL) = 3.5 ml; the volume of HCl to be diluted
V₂(HCl) = 100 ml; final volume of HCl after dilution.
c₂(HCl) = ?; final concentration of the solution of HCl, after dilution
c₁ · V₁ = c₂ · V₂; formula to calculate concentration of a solution
c₂(HCl) = c₁ · V₁ ÷ V₂.
c₂(HCl) = 2.5 M · 3.0 ml ÷ 100 ml
c₂(HCl) = 0.075 M
Chemical dissotiation of hydrochloric acid:
HCl(aq) → H⁺(aq) + Cl⁻(aq)
c(HCl) = c(H⁺) = 0.075 M
pH = -logc(H⁺)
pH = -log(0.075 M)
pH = 1.12; potential of hydrogen
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25 moles of methane gas are contained in a 20-liter container at a pressure of 30 x 105 pa. the gas temperature must be:_____.
By ideal gas approximation, the temperature of methane gas is 361.01 K.
We need to know about the ideal gas theory to solve this problem. The ideal gas is assumed that there is no interaction between particles in a gas. It can be determined by the equation
P . V = n . R . T
where P is pressure, V is volume, n is the number of moles gas, R is the ideal gas constant (8.31 J/mol.K) and T is temperature.
From the question above, we know that
V = 20 L = 0.02 m³
P = 30 x 10⁵ Pa
n = 20 moles
By substituting the following parameters, we get
P . V = n . R . T
30 x 10⁵ . 0.02 = 20 . 8.31 . T
166.2T = 6 x 10⁴
T = 361.01 K
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When the leveling bulb is higher than the water level, the pressure in the system is greater than atmospheric pressure. true /false
The correct answer is true.
When the leveling bulb is higher than the water level, pressure in the system is greater than atmospheric pressure
What do you mean by atmospheric pressure?Atmospheric pressure, also called the barometric pressure, force per unit area exerted by an atmospheric column (that is, the entire body of air above the specified area).
Atmospheric pressure can be measured with a mercury barometer (hence the commonly used synonym barometric pressure), which indicates height of a column of mercury that exactly balances the weight of the column of atmosphere over the barometer.
The atmospheric pressure is also measured using an aneroid barometer, in which the sensing element is one or more hollow, partially evacuated, corrugated metal disks supported against collapse by an inside or outside spring; the change in the shape of the disk with changing pressure can be recorded using a pen arm and a clock-driven revolving drum.
A pressure system is a relative peak or lull in sea level pressure distribution. Pressure systems cause the weather to be experienced locally.
Low-pressure systems are associated with band precipitation that minimize the temperature changes throughout the day, whereas, high-pressure systems normally associate with dry weather and mostly clear skies with larger diurnal temperature changes due to the greater radiation at night and greater sunshine during the day. Pressure systems are analyzed by those in the field of meteorology within the surface weather maps.
The leveling bulb is higher than the water level, pressure in the system is greater than atmospheric pressure.
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The separation of the components of a mixture is based upon the fact that each component has different choose. Properties. The components of a mixture are separated based on their choose. Properties.
The separation of the components of a mixture is based upon the fact that each component has different physical properties. The components of a mixture are separated based on their physical properties.
For example, crude oil is mixture consist of several different hydrocarbons (alkanes, alkenes...).
This hydroalkanes can be separated from mixture (crude oil) using distilation (usually fractional distillation), because they have different boiling points (physical properties).
Mixture is composed of at least two substances.
Pure substance is made of only one type of atom (element) or only one type of molecule (compound), mixtures and solutions are made from two or more types of pure substances.
Mixtures can be separeted by physical means, while compounds cannot.
There is a definite recipe to make each mixture, because composition of mixture can vary.
Missing options:
First question, I can choose from CHEMICAL or PHYSICAL
Second question, I can choose from HOMOGENOUS, UNIFORM, PHYSICAL or CHEMICAL.
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An object has a density of 9.22 g/cm³. What is the mass of 20.21 cm³ of this substance?
The mass of the given object will be 186.3g
The measure of how densely a material is packed together is called density.Formula of density is mass / volumeunit of density is g/cm³ etc.the amount of space a three-dimensional object takes up, expressed in cubic units.unit of volume are cm³, m³, mL and L. we can find out any missing term of other two terms are given.Given,
Density of the object is 9.22g/cm³
volume of the object is 20.21 cm³
we have to find out mass of the object with the help of these two terms.
As we know,
Density = mass / volume
mass. = density × volume
mass = 9.22 g/cm³ × 20.21 cm³
mass = 186.3 g
Therefore mass of given object is 186.3g.
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represent each of the following as a number between 0.1 and 1000 using an appropriate prefix: (a) 45 320 kn, (b) 568(105) mm, and (c) 0.00563 mg.
Prefix of appropriate number between 0.1 and 1000 a) 45.320MN, b) 568 hm c) 5.63ug
a) Convert to a prefix that allows the value to be between 0.1 and 1000
45, 320 kn × [tex]\frac{MN}{1000kn} = 45.320MN[/tex]
(b) 568(105) mm converting to prefix value between 0.1 to 1000
568× 10 ⁵ mm = 568 ˣ 10⁵ ˣ 10⁻³m
= 568 × 10²m
= 568 hm
(c) 0.00563 mg conversion to prefix number in between 0.1 to 1000
0.00563 ˣ 10⁻³
= [tex]\frac{5.63}{10^{6} }g[/tex]
= 5.63 × 10⁻⁶g
= 5.63ug
What is the prefix in chemistry?A prefix to the name comes before the molecule. The prefix of the molecule's name is predicated on the number of carbon atoms. for instance , a sequence of six carbon atoms would be named using the prefix hex-. The suffix to the name is an ending that's applied that describes the types of chemical bonds in the molecule.
What are the primary ten prefixes in organic chemistry?Dec is for ten carbons. The prefixes for identical groups are mono, di, tri, tetra, penta, hexa, hepta, octa, nona, and deca. Mono is never used in organic chemistry.
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Why should an acid be handled with caution?
Answer:
Because they are corrosive. Acids are extremely corrosive to all body tissue, especially eyes and skin. Due to this powerful corrosiveness, acids are highly toxic.
Explanation:
Indicate which alcohol in each pair will undergo an elimination reaction more rapidly when heated with h2so4.
Indicate which alcohol in each pair will undergo an elimination reaction more rapidly when heated with H-SO CH2OH CH CH2OH он OH.
What is alcohol ?Ketones, aldehydes, and carboxylic acids can be produced when alcohol is oxidized. These functional groups can be used to additional processes; for instance, carboxylic acids can be used for esterification, while ketones and aldehydes can be applied to subsequent Grignard reactions. When an organic compound is oxidized, more bonds from carbon to oxygen (or another electronegative element, like a halogen), and possibly fewer links to hydrogen, are formed.
Secondary alcohols can be efficiently oxidized up to the ketone stage without rupturing carbon-carbon bonds. Except in extremely restricted circumstances, no more oxidation is visible. Tertiary alcohols cannot be oxidized at all without rupturing carbon-carbon bonds, in contrast to primary alcohols, which can be converted to aldehydes or further converted to carboxylic acids.
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of the two lewis/electron dot structure representations, which is the correct one for phosphorus trifluoride?
Lewis dot structure of PF3 contains 1 lone pair on the central atom(phosphorous) and 3 lone pairs on each outer atom(fluorine).
The diagrams known as Lewis structures, often referred to as Lewis dot formulas, Lewis dot structures, electron dot structures, or Lewis electron dot structures, depict the interactions between the atoms in a molecule as well as any lone pairs of electrons that may be present.
The trigonal pyramid is the form or molecular geometry of PF3. Since PF3's core region comprises four zones of electron density, its electron geometry is tetrahedral. One lone pair is present on the core atom (phosphorus) in the Lewis dot structure of PF3, and three are present on each outside atom (fluorine).
See the reference image below:
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a sheet of aluminum (al) foil has a total area of 1.000 ft2 and a mass of 3.686 g. what is the thickness of the foil in millimeters (density of al
The thickness of the aluminum foil in millimeters is 0.0147 mm
What is density?The density of a substance is simply defined as the mass of the subtance per unit volume of the substance. Mathematically, it can be expressed as
Density = mass / volume
How to determine the volume of the aluminumMass of aluminum = 3.686 gDensity of aluminum = 2.699 g/cm³Volume of aluminum =?Density = mass / volume
Thus,
Volume = mass / density
Volume of aluminum = 3.686 / 2.699
Volume of aluminum = 1.366 cm³
Divide by 28316.8 to express in ft³
Volume of aluminum = 1.366 / 28316.8
Volume of aluminum = 4.82×10⁻⁵ ft³
How to determine the thickness of the aluminum foilArea = 1 ft²Volume of aluminum = 4.82×10⁻⁵ ft³Thickness =?Volume = area × thickness
Divide both sides by area
Thickness = volume / area
Thickness = 4.82×10⁻⁵ / 1
Thickness = 4.82×10⁻⁵ ft
Multiply 304.8 to express in mm
Thickness = 4.82×10⁻⁵ × 304.8
Thickness = 0.0147 mm
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Complete question
A sheet of aluminum foil has a total area of 1.000ft2and a mass of 3.686g. What is the thickness of the foil inmillimeters? (The density of aluminum is 2.699g/cm3)
6. A student adds a mixture of oil, sand and salt in a beaker of water and stirs it. The student stops stirring, and observes that the salt is no longer visible. It is also observed that the oil floats on the top and the sand sinks to the bottom of the beaker.
a. Why does oil float on water?
b. Why is salt no longer visible after the stirring?
c. How can you separate the components of this mixture?
Explanation:
a)oil floats on water because oil has less dense than the water.
b) since salt dissolve in water.
c) 1. Decantation -
Oil floats on water (oil is insoluble in water), so it can be decanted easily.
2. Filtration-
Filter the mixture and sand will be separated from the water (as it is insoluble in water), and only salt solution will be left.
3. Evaporation-
The salt solution can be evaporated, by this, the salt will separate out.
The concentration of a was 0.65 m at 33 s. the initial concentration of a was ________ m.
The concentration of a was 0.65 m at 33 s. the initial concentration of a was ________ m.
What is the concentration of a solution?
The quantity of solute in a solvent is used to define the concentration of a solution in chemistry. A solution is said to have more solute when it is a concentrated solution, and it contains more solvent when it is a dilute solution. The amount of solute that has dissolved in a specific volume of solvent or solution is measured as solution concentration. The term "concentrated" refers to a solution that has a significant amount of dissolved solute.
The following reaction has a second order in [A] and a rate constant of 0.025 M-1 s-1:
A→B
Thus the concentration is 1.4m.
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Which of the following questions can be answered by science? a What makes a song sound beautiful? b What is the meaning of life? c What makes a painting beautiful? d What are the effects of low pH in soil?
The question that can be answered by science is What are the effects of low pH in soil. So, the correct option for this question is D.
Science is a branch of scientific study which involves the knowledge application and understanding of the social world and natural world on the basis of evidences.
Science deals with the natural phenomena and nature. So, the soil is an abiotic component of nature.
It can be classified broadly into the three categories such as Physics, Chemistry, and biology. Each sub-classification tells and demonstrates its own field of studies.
In the soil depends, the low pH depends on various factors like the complexity of the organisms living on a particular area, resources, etc.
So, the question that can be answered by science is "What are the effects of low pH in soil". Thus, the correct option for this question is D.
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What type of chemical bond holds the atoms together within a water molecule?
a. nonpolar covalent bond
b. ionic bond
c. polar covalent bond
d. coordinate covalent bond
C. Polar Covalent Bond is the chemical bond holds the atoms together within a water molecule.
What type of chemical bond holds the atoms in a water molecule together?bonds that are covalent
Covalent bonds are strong bonds that hold the hydrogen (white) and oxygen (red) atoms of individual H2O molecules together. Covalent bonds form when two atoms, in this case oxygen and hydrogen, share electrons. Polar covalent bonds hold the atoms in a water molecule together. Hydrogen bonds attract water molecules to one another. One of the most important characteristics of water is that it is made up of polar molecules. Water molecules (H2O) contain two hydrogen atoms and one oxygen atom, which form polar covalent bonds. The oxygen atom in a single molecule of water is bonded to the two hydrogen atoms via polar covalent bonds. As a result, water molecules are polar and can form hydrogen bonds with one another.To learn more about Polar Covalent Bond refer to
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Select the correct answer. what type of creation story describes how earth originated from water? a. ex nihilo b. emergence c. world parents d. earth diver
Earth diver story type of creation story describes how earth originated from water.
A creation myth or cosmogonic myth is a symbolic narrative of how the world began and how people first came to inhabit it. earth diver is a common character in various traditional creation myths who is sent by a supreme being into the primal waters to find substance (often sand or mud) with which to build habitable land. earth diver featured character are the on who dives into water and bring up a small amount of mud and sand and that's why according to this theory supreme being is responsible for sending animals inside the water to find little bit of mud and sand.
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probing high-density nuclear symmetry energy with ξ −/ξ 0 ratio in heavy-ion collisions at √ snn ∼ 3 gev
One of the most ambiguous characteristics of dense neutron-rich materials is the high-density behavior of nuclear symmetry energy.
What is nuclear symmetry energy?The nuclear symmetry energy describes how the binding energy changes as a nuclear system's neutron to proton ratio changes. Given that it only pertains to the dual nature of nuclear systems, this is one of the most crucial aspects of nuclear physics in general. As a result, it is one of the most important physical variables that influences how many phenomena and nuclear processes behave in terms of physics. This review article provides an overview of the function and significance of the nuclear symmetry energy in many study areas, as well as the reliability of its estimation from phenomenology and the microscopic many-body theory.
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equal amounts of a pure substance undergo the following changes. which process would you predict release the greatest amount of energy
It is said that two substances are entirely miscible when they combine to create a single homogenous phase in all ratios. When two substances, like oil and water, are essentially insoluble in one another, they are said to be immiscible.
The substance present in the highest amount is the solvent in all solutions, whether gaseous, liquid, or solid, and the substance(s) present in the least amount is/are the solute (s). The solvent and the solute need not be in the same physical state, although the solvent's physical state typically dictates the nature of the solution. The solute is considered to be soluble in the solvent if they can combine to form a homogenous solution.
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Set the total electron capacity to:
c). a 3p orbital.
Answer:
6e
Explanation:
Number of orbitals in each subshell:
S - 1
P - 3
D - 5
F - 7
The number of orbitals increases by 2
Subshell p has 3 orbitals, each orbital can hold up to 2 electrons. Therefore, 3p has an electron capacity of 6.
**Note: The number 3 in 3p only represents the shell number and does not influence the electron capacity.
describe/draw the difference between lone pairs of electrons and bonded electrons? give two examples of molecules that have both in their structure
The difference between bond pair and lone pair of electrons are :
1. Bond pair is a pair of electrons that are in a bond where as lone pair of electrons are not in a bond.
2. Bond pairs electrons are always in bonds where as lone pair of electrons are not in bonds but it can forms bond by donating the electrons.
3. In bond pair, electrons belongs to two atoms where as in lone pair, electrons belongs to the same atom.
4. Bond pair is created due to sharing of electrons where as lone pair is due to the absence of orbitals.
Two examples of molecules that have both lone pair and bond pair electrons are : ClF3, h2O
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Which quantity is held constant when working with boyle’s, charles’s, and gay-lussac’s laws? volume moles pressure temperature
The quantity the is help constant in Boyles's law is Temperature, Charles' law is Pressure, Gay-Lussac's law is number of moles.
Boyle's law states that at constant temperature the volume of the gas is directly proportional to the pressure exerted by the gas.
P α V....(i)
Charles' law states that at constant pressure the volume of the gas is directly proportional to the absolute temperature of the gas.
V α T....(ii)
Gay-Lussac's law states that for a given number of molecules of gas the Pressure of the gas is directly proportional to the absolute Temperature of the gas.
P α T....(iii)
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the current research presents a detailed study to manufacture novel woven carbon/elium® (wel) thermoplastic composite helmets
Thermoplastics are those types of plastics that could be used several times because they could be melted and recycled.
What are thermoplastics?A plastic is a material that is produced from monomer materials. In effect, plastics are polymers. The monomeric units that compose plastics could be made from natural or synthetic sources. There are two types of plastics;
Thermoplastics
Thermosets
The thermoplastics are those types of plastics that could be used several times because they could be melted and recycled. As such, there is a lot of research into the use of thermoplastics.
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You fire a beam of light at a piece of metal and determine that electrons are emitted with 2. 0 ev of energy. You increase the wavelength of the light and determine that electrons are still being emitted. What else is true?.
The correct answer is option B: there is a decrease in the speed of the emitted electrons.
If we increase the wavelength of the light and determine that electrons are still being emitted. Then the truth is that there is a decrease in the speed of the emitted electrons.
In chemistry, the relation between the energy of a light photon and its wavelength is given by the following equation;
E = hc / λ
or λ = hc / E
Here, h is the plank's constant, 'E' represents the energy of light photons, and c is the light speed where λ indicates the wavelength of the light.
The above equation shows that the energy of photons and wavelength are inversely related to each other.
The value of energy decreases, if wavelength increases.
To put it simply, if the energy decreases then the speed and kinetic energy of the emitted electron also decrease.
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The complete question is:
You fire a beam of light at a piece of metal and determine that electrons are emitted with 2.0 eV of energy. You increase the wavelength of the light and determine that electrons are still being emitted. What else is true?
(A) there is an increase in the speed of the emitted electrons.
(B) there is a decrease in the speed of the emitted electrons.
(C) there is an increase in the number of electrons emitted.
(D) there is a decrease in the number of electrons emitted.
What is the iupac name of the following compound? 2-ethyl-4-hexanone 3-methyl-5-heptanone 5-ethyl-3-hexanone 5-methyl-3-heptanone
The correct option is (d) 5-methyl-3-heptanone.
The IUPAC name of the given compound is 5-methyl-3-heptanone.
What is the IUPAC name of the compounds?The International Union of Pure and Applied Chemistry (IUPAC) is the foremost expert on chemical terminology and nomenclature, including the naming of new elements in the periodic table, standardized measurement techniques, atomic weights, and a wide range of other data that has undergone rigorous analysis.
The longest chain of carbons connected by a single bond, whether in a continuous chain or a ring, serves as the foundation 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.
1. First, identify the longest C-chain. Here it is a 7-C chain (-hept)
2. Give the smallest number of functional group (C-3-Ketone)
3. Substitutional group C-5: methyl
Therefore, the IUPAC name of the compound is 5-methyl-3-heptanone.
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The correct question is:
"What is the IUPAC name of the following compound?
(a) 2-ethyl-4-hexanone
(b) 3-methyl-5-heptanone
(c) 5-ethyl-3-hexanone
(d) 5-methyl-3-heptanone"
consider the structures of the molecules below. are these molecules polar, nonpolar, or amphiphilic?
Compounds A and D are amphiphilic, compound B is nonpolar, and compounds C and E are polar.
What is amphiphilic?A chemical substance with both hydrophilic (polar, attracted to water) and lipophilic (attracted to fat) qualities is called an amphiphile (also known as an amphipath; from the Greek, amphis: both and, philia: love, friendship). Amphiphilic or amphipathic describes such a chemical. Soaps, detergents, and lipoproteins are examples of common amphiphilic compounds. Cell membranes' primary structural element is a phospholipid amphiphile.
Chemistry and biochemistry research, particularly that on lipid polymorphism, is based on amphiphiles.
Bolaamphiphilic refers to organic molecules with hydrophilic groups at both ends of the molecule. Prolate micelles are what they create in the aggregate.
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how many ml of 4% creosol solution need to be mixed with water to prepare 50 ml of a 1:150 creosol solution
The total quantity of creosol solution is q1 = 8.25ml.
What is creosol solution?a flavourless, strong, oily liquid, CH3OC6H3(CH3)OH, made from guaiac resin and beechwood tar; it is an active ingredient in creosote and is used as an antibacterial. Word genesis.
total quantity (q2) = 50 ml
concentration of final solution
C2 = 1:150
= 1/150 * 100
= 0.66%
quantity of stock * concentration of stock = quantity of final solution * concentration of final solution
q1 * c1 = q2 * c2
q1 = 50 * 0.66/4
q1 = 8.25ml
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Pseudoscience is best defined as ____ science.
factual
false
fun
feedback-based
Answer:
false
Explanation:
Pseudoscience is a field of study where researchers claim to be scientific in their research and adopt some of the procedures of science, but fail to fulfill the criteria effectively.