The substance with the strongest attractive forces between its particles is water, which is composed of two hydrogen atoms and one oxygen atom.
Water molecules interact with each other through hydrogen bonds, which are strong dipolar forces. These hydrogen bonds are responsible for the high boiling point of water (100 °C) and its high surface tension. The equation for this force is given by:
[tex]F = \frac{D (E1 * E2)}{ r^{3}}[/tex]
where D is the dipole moment, E1 and E2 are the charges on the atoms, and r is the distance between them.
The substance with the weakest attractive forces between its particles is air, which is composed of nitrogen, oxygen, and other gases. The molecules in air interact weakly through London Dispersion Forces, which are weaker than hydrogen bonds. These forces are responsible for the low boiling point of air ( -79 °C) and its low surface tension. The equation for this force is given by:
[tex]F = \frac{A }{ r^{6}}[/tex]
where A is the London Dispersion Force constant, and r is the distance between the atoms.
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a swimming pool whose volume is gal contains water that is ​% chlorine. starting at t​0, city water containing ​% chlorine is pumped into the pool at a rate of ​gal/min. the pool water flows out at the same rate. what is the percentage of chlorine in the pool after ​? when will the pool water be ​% ​chlorine?
the percentage of chlorine in the pool will be % When the amount of chlorine in the pool is equal to the amount that was in the city water.
The pool has a total volume of gal, and it is initially filled with water containing % chlorine. Starting at t0, city water containing % chlorine is pumped into the pool at a rate of gal/min. At the same time, the pool water flows out of the pool at the same rate.
After minutes, the pool will contain % chlorine. This can be determined by calculating the amount of chlorine that will be in the pool after minutes, which is calculated by adding the amount of chlorine that was initially in the pool and the amount of chlorine that will be added to the pool from the city water. When the amount of chlorine in the pool is equal to the amount that was in the city water, the percentage of chlorine in the pool will be %.
When the pool water reaches % chlorine, this will happen after minutes. This can be determined by calculating the amount of chlorine that will be in the pool after minutes, which is calculated by subtracting the amount of chlorine that was initially in the pool, and adding the amount of chlorine that will be added to the pool from the city water. When the amount of chlorine in the pool is equal to the amount that was in the city water, the percentage of chlorine in the pool will be %.
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I’ll give brainliest if you can explain as well pls
a 50.00 ml sample is titrated with 18.10 ml of a 0.0148 m hcl solution to the phenolphthalein endpoint. what is the p alkalinity of the sample in ppm of caco3?
The p-alkalinity of the CaCO3 sample in ppm is 12.57.
In order to solve this problem, we need to use the balanced chemical equation for the reaction between the HCl and the alkalinity in the sample:
OH- + HCl -> H2O + Cl-
From the equation, we can see that each mole of HCl reacts with one mole of OH-. Therefore, the number of moles of OH- in the sample is equal to the number of moles of HCl that were added during the titration.
We can use this information to calculate the p-alkalinity of the sample as follows:
Calculate the number of moles of HCl that were added during the titration:
moles HCl = concentration of HCl x volume of HCl
= 0.0148 mol/L x 0.01810 L
= 0.00026788 mol
Since the reaction is 1:1 between OH- and HCl, the number of moles of OH- in the sample is equal to the number of moles of HCl that were added during the titration:
moles OH- = 0.00026788 mol
Convert the number of moles of OH- to ppm of CaCO3:
ppm CaCO3 = (moles OH-) x (1000000 ppm / 1 mol OH-) x (100 g CaCO3 / 2 mol OH-) x (1 L / 50.00 mL)
ppm CaCO3 = 267.88 ppm
Calculate the p-alkalinity:
p-alkalinity = 14 - log(ppm CaCO3)
= 14 - log(267.88)
= 12.57
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why is it more accurate to standardize the naoh with khp than to standardize with a solution of hcl?
It is more accurate to standardize the NaOH with KHP than to standardize with a solution of HCl because it is stable under the acid base reaction conditions and has a high molecular weight.
Titration processes may occasionally claim a standardization process to regularize a secondary standard using a primary standard. This is because a secondary standard is what will be used in the titration of a certain analyte and its original attention may not be known directly beforehand.
Strong base solutions need to be standardised since chemicals like NaOH will inadvertently pick up moisture from the air and react with gases like CO2 to produce undesired contaminants in the base's stock sample. As a result, we cannot be certain that the mass of NaOH pellets we measure to create a desired solution is the mass of NaOH itself. The bulk consists of all of the impurities together. As a result, we cannot be certain of the base concentration in the solution we make.
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What is the electron configuration for magnesium?
Answer:
D.1s2 2s2 2p6 3s2
Explanation:
The electron configuration of magnesium is [Ne] 3s2, where [Ne] represents the electron configuration of a neutral neon atom. This means that magnesium has two electrons in its 3s orbital, with the other ten electrons being in the 1s and 2s orbitals. This electron configuration represents the arrangement of electrons in the shells around the magnesium atom's nucleus. The electron configuration is used to predict the chemical and physical properties of an element and its behavior in chemical reactions.
Allen
what occurs when an atom of chlorine and an atom of hydrogen become a molecule of hydrogen chloride?
When an atom of chlorine and an atom of hydrogen become a molecule of hydrogen chloride a chemical bond is formed and energy is released.
Chemical Bonding refers to the conformation of a chemical bond between two or further tittles, motes, or ions to give rise to a chemical emulsion. These chemical bonds are what keep the tittles together in the influencing emulsion.
During the bond conformation, when reactant tittles come closer to form chemical bonds, the energy is relased to minimize the aversion between the tittles.
Since the system tends to release energy when a chemical bond is established, the enthalpy change in this script will be negative.
In the implicit energy wind during the conformation of a chemical bond, the energy is negative at equilibrium distance which indicates that energy is released during the conformation of a bond.
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is stokes' law valid for droplets of oil falling in water? for air bubbles rising in benzene? for tiny particles falling in air, if the particle diameters are of the order of the mean free path of the molecules in the air?
Stakes' law is valid for any object falling into water or any other liquid. Yes, you can use Stokes' law if liquid oil is falling into water.
Stake's Law:
In 1851, George Gabriel Stokes derived Stokes' law (also called drag) for the frictional force acting on a spherical body with a very low Reynolds number in a viscous fluid. Stokes' law is derived by solving the Stokes flow limit for small Reynolds numbers in the Navier-Stokes equation.
Gambling's law is a mathematical equation that describes the rate of sedimentation of small spherical particles in a liquid medium. This law is derived by considering the force acting on a particular particle as it sinks in the thickness of a liquid under the influence of gravity. In a viscous fluid, the force slowing the sphere's motion is directly proportional to the velocity and radius of the sphere as well as the viscosity of the fluid.
From the viscosity equation according to Stake's law, we know that the viscous force acting on a sphere is directly proportional to the following parameters:
the radius of the sphere (r)coefficient of viscosity (η)the velocity of the object (v)The force of viscosity on a small sphere moving through a viscous fluid is given by:
[tex]F_{d}[/tex] = 6πμRv
Where,
[tex]F_{d}[/tex] is the frictional force known as Stokes drag, acting at the interface between the fluid and the particle
μ is the dynamic viscosity (some authors use the symbol η)
R is the radius of the spherical object
v is the velocity relative to the flowing object
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Why would you want to know how much carbon dioxide your dream car produces?
Answer:
You might want to know the amount of carbon dioxide produced by your dream car for a variety of reasons. For example:
Environmental impact: Knowing the carbon dioxide emissions of a car can give you an idea of its impact on the environment. High carbon dioxide emissions contribute to climate change, air pollution, and other environmental issues.
Fuel efficiency: A car that produces high levels of carbon dioxide is likely to be less fuel efficient. This means that it may consume more fuel than other vehicles, making it more expensive to operate over time.
Government regulations: Many countries have regulations that limit the amount of carbon dioxide that cars can emit. Knowing the emissions of your dream car can help you determine whether it is compliant with these regulations.
Personal responsibility: If you are concerned about the impact of your actions on the environment, knowing the carbon dioxide emissions of your dream car can help you make informed decisions about the car you purchase and how you use it.
Explanation:
Overall, knowing the carbon dioxide emissions of your dream car can help you make informed decisions about your driving habits and the car you purchase.
ALLEN
which of the properties are desirable of a gravimetric analysis precipitate? insoluble easily filterable pure forms a colloidal suspension small particle size
The properties which are desirable of a gravimetric analysis precipitate are:
insoluble, easily filterable, pure and small particle size.
Gravimetric analysis precipitates should be insoluble in the solution from which they were generated. This guarantees that the mass of the precipitate can be determined accurately.
The precipitate should be easily filterable, which means it should form a compact, well-defined layer on the filter paper without passing through the filter paper's pores. This allows for the precipitate to be easily separated from the solution and any contaminants.
The precipitate should be pure, which means it should be free of any contaminants that might impair the gravimetric analysis's accuracy. Any contaminants in the precipitate might contribute to an overestimation of the analyte.
Small particle size is preferred because it increases the surface area of the precipitate, allowing for the thorough elimination of any contaminants that may be present. Also, tiny particles settle faster, which might shorten the time required for the gravimetric analysis's precipitation stage.
A colloidal suspension is undesirable because it implies that the particles are too tiny to settle out of the solution and may be difficult to separate during the filtering process. This might result in insufficient precipitation and erroneous data.
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Which food chain best represents the flow of energy from plants to mountain lions in this food web?
1. Plants, grasshoppers, frogs, mountain lions
2. Plants, deers, coyotes, mountain lions
3. Plants, deer, birds, mountain lions
4. Plants, grasshoppers, birds, mountain lions
a red blood cell is placed into each of the following solutions. indicate whether crenation, hemolysis, or neither will occur. solution a: 4.19 % (m/v) nacl solution b: 1.78 % (m/v) glucose solution c: distilled h2o solution d: 7.6 % (m/v) glucose solution e: 5.0 % (m/v) glucose and 0.9 % (m/v) nacl
Following are the the effect of each solution on the red blood cells as per the given information :
a) crenation
b) neither
c) hemolysis
d) crenation
e) neither
The behavior of red blood cells (RBCs) in different solutions can be determined by comparing the tonicity of the solution to the tonicity of the RBC.
A hypertonic solution has a higher solute concentration than the cell and will cause water to move out of the cell, leading to crenation (shrinking) of the RBC.
A hypotonic solution has a lower solute concentration than the cell and will cause water to move into the cell, leading to hemolysis (bursting) of the RBC.
An isotonic solution has the same solute concentration as the cell and will not cause any net movement of water.
Using this given information, we can determine the effect of each solution on the RBCs:
a) 4.19% (m/v) NaCl solution is hypertonic to the RBC, so water will move out of the cell and cause crenation.
b) 1.78% (m/v) glucose solution is isotonic to the RBC, so it will not cause any crenation or hemolysis.
c) Distilled H2O is hypotonic to the RBC, so water will move into the cell and cause hemolysis.
d) 7.6% (m/v) glucose solution is hypertonic to the RBC, so water will move out of the cell and cause crenation.
e) 5.0% (m/v) glucose and 0.9% (m/v) NaCl solution is isotonic to the RBC, so it will not cause any crenation or hemolysis.
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which of the following best describes the formation of the bond shown in figure 1 ? responses an ionic bond is formed between a carbon atom of one amino acid and the nitrogen atom of the other amino acid. an ionic bond is formed between a carbon atom of one amino acid and the nitrogen atom of the other amino acid. an ionic bond is formed when the negative charge of an oh oh group is balanced by the positive charge of a hydrogen ion. an ionic bond is formed when the negative charge of an o h group is balanced by the positive charge of a hydrogen ion. a covalent bond is formed between a carbon atom and a nitrogen atom along with the formation of h2o h 2 o . a covalent bond is formed between a carbon atom and a nitrogen atom along with the formation of h 2 o . a covalent bond is formed that replaces the hydrogen bond between the oh oh group and the h
Together with the creation of H2O, a covalent bond is created between a carbon and a nitrogen atom.
When two amino acids come together, a peptide bond is created.
It entails the release of water together with the fusion of the carboxyl group of one amino acid (COOH) with the amino group of another amino acid (NH2) (H2O).
Because a carbon atom (C) and a nitrogen atom (N) share electrons, a peptide bond is a sort of covalent link (N).
Hence, along with the creation of H2O, the reaction depicted in the graphic attached also results in the development of a covalent bond between a carbon atom and a nitrogen atom.
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a solution is made using 191.7 ml of isopropanol (density 0.7860 g/ml) and 275.0 ml of water (density 1.000 g/ml). what is the molality isopropanol in water?
Isopropanol has a molality in water of 9.1315 M. suppose a solution is created using 275.0 ml of water and 191.7 ml of isopropanol, both of which have a density of 1.000 g/ml.
Molarity = grams of solute/molar mass of solute x 1/mass of solvent(Kg)
mass os isopropanol = density x volume
= 0.7860 g/ml x 191.7 ml
= 150.6762 gm
mass of water(solvent) = 275.0 ml x 1.000 g/ml
=275.0 gm
= 0.275 Kg
Molarity = 150.67gm / 60g/mol x 1/0.275Kg
Molarity = 9.1315 M
The number of moles of solute per litre of solution is known as molecularity or molar concentration.
The mass or moles of solute and the volume of the solution can be converted using molar concentration.
Homogeneous mixes are created when ingredients are combined in a way that ensures the composition is consistent throughout the sample. The term "heterogeneous" refers to a mixture that does not have a constant composition across the sample.
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Is the disaccharide made from a glucose linked to a fructose?
Sucrose is the carbohydrates that disaccharide made from a glucose which is linked to a glucose named fructose.
Carbohydrates are one of the macro minerals, along with protein and fat, that give the energy necessary for the body to perform all it's diurnal functions. There are two general types of carbohydrates called simple carbohydrates and complex carbohydrates.
Simple carbohydrates are broken down by the body veritably snappily into glucose for energy, and complex carbohydrates have longer chains of glucose motes and thus take longer to digest.
Polysaccharide comes from word “ poly ” which means numerous. Polysaccharides formed of long chains or numerous motes of monosaccharides. It includes bounce, cellulose, glycogen.Two motes of a simple sugar that are linked each other form a disaccharide. One of the most common disaccharides is sucrose( known as table sugar), which is composed of one glucose and one fructose patch. Maltose is composed of two glucose motes, while lactose( milk sugar) is synthesized by glucose and galactose.Monosaccharides or simplest sugar is a structure blocks of carbohydrates. They're glucose, galactose and fructose.Learn more about Types of carbohydrates:
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how many grams of pbbr2 will precipitate when excess febr3 solution is added to 79.0 ml of 0.578 m pb(no3)2 solution?
Lead nitrate reacts with ferric bromide to give lead bromide and ferric nitrate. Here the weight of lead bromide precipitate will be 16.75g.
We can write the balanced reaction as follows,
3Pb(NO₃)₂ + 2FeBr₃ -----------> 3PbBr₂ + 2Fe(NO₃)₃
Here ferric bromide is in excess, so the limiting reagent will be lead nitrate.
Number of moles = molarity × volume in L
Number of moles of lead nitrate reacted = 0.578 × 0.079
= 0.0456
3 moles of lead nitrate reacts to form 3 moles of lead bromide.
So 0.0456 moles of lead nitrate gives 0.0456 moles of lead bromide.
Number of moles of lead bromide = 0.0456
Molar mass of lead bromide = 367.01
Mass of lead bromide formed = Number of moles× molar mass
= 0.0456 × 367.01 = 16.75g
So the mass of lead bromide precipitate will be 16.75g
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can you guys help me with these things??? please!
The balanced reaction equation is; NH4Cl (aq) → NH3 (aq) + HCl (aq)
The temperature was increasing by 1 degree.
How do you balance reaction equation?
Balancing a chemical reaction equation involves making sure that the same number of each type of atom appears on both the reactant and product side of the equation. This is necessary because the law of conservation of mass states that the total amount of matter in a system must remain constant.
To balance a chemical reaction equation, follow these steps:
Write the unbalanced equation
Count the number of atoms of each element on both sides of the equation.
Add coefficients (numbers in front of molecules) to the reactants or products to make the number of atoms of each element the same on both sides of the equation.
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In an air conditioner, heat is transferred to outside a room through work done _____ the refrigerant gas, in the _____. A) on, expansion valve B) on; compressor C) by, expansion valve D) by, compressor
In an air conditioner, heat is transferred outside a room through work done by the refrigerant gas, in the compressor. The correct option is D)by, compressor.
How Air Conditioners WorkAir conditioners work by transferring heat from inside a room to the outside environment through a process that involves the compression and expansion of refrigerant gas. The process starts with the compressor, which compresses the refrigerant and raises its temperature and pressure. This high-pressure, high-temperature gas then flows to a condenser coil, where it releases heat to the outside environment, condenses into a liquid, and passes through an expansion valve, which reduces its pressure and temperature. This low-pressure, low-temperature liquid then flows through an evaporator coil, where it absorbs heat from the room, and evaporates back into a gas. The cycle repeats as the compressor takes in the low-pressure gas from the evaporator, and the process starts all over again. This continuous cycle of compression and expansion of the refrigerant gas enables air conditioners to transfer heat from inside a room to the outside environment, creating a comfortable indoor environment.
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The greater the speed of gas particles in a container, the:greater the pressurefewer collisions there will belower the temperaturelower the pressure
The greater the speed of gas particles in a container, the greater the pressure which is therefore denoted as option A.
What is Pressure?This is referred to as the force applied perpendicular to the surface of an object per unit area. It is also the continuous physical force which is exerted on or against an object by something in contact with it.
In a scenario where the speed of gas particles in a container then it means that the pressure which would be exerted on the containers will be greater due to the increased collission between thereby making option A the correct choice.
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6. The acid strength of the oxyacids of chlorine is as follows:
HCIO4 > HCIO3 > HCIO2 > HCIO
Which statement best explains this trend?
(A) The electrons in the H-O bond are pulled away from
the hydrogen by the more electronegative oxygen, mak-
ing the bond weaker. Additional oxygen atoms intensify
this effect, making the H-O bond even weaker and
increasing the degree of ionization.
(B) Oxygen is less electronegative than hydrogen. Addi-
tional oxygen atoms provide greater repulsion of the
electrons and cause them to be even closer to the hydro-
gen atom, making the H-O bond weaker and increasing
the degree of ionization.
(C) Extra electrons are always attracted to the central atom
in a molecule. With more oxygen atoms, additional elec-
trons are transferred to the chlorine atom. This weakens
the H-O bond and increases the degree of ionization.
(D) Oxygen has six valence electrons. Each oxygen atom
needs two additional electrons to fulfill its octet. These
electrons are pulled from the H-O bond and cause the
acid to ionize. More oxygen atoms require more elec-
trons, so the degree of ionization increases.
Explanation:
The correct statement that best explains the trend in the acid strength of the oxyacids of chlorine is (A). The electrons in the H-O bond are pulled away from the hydrogen by the more electronegative oxygen, making the bond weaker. Additional oxygen atoms intensify this effect, making the H-O bond even weaker and increasing the degree of ionization. The trend in acid strength is due to the increasing electronegativity of oxygen and the corresponding weakening of the H-O bond in the acid.
due to the conjugation between the alkene and the carbonyl group in the product, the two alkene hydrogen atoms will show up at very different chemical shift from each other. when drawing a reasonable resonance structure of the product that shows a charge on one of the two alkene carbons, will this resonance structure cause extra shielding or extra deshielding? why?
The resonance structure with a positive charge on one of the alkene carbons will cause extra deshielding, as the positive charge withdraws electron density from the alkene.
reducing its electron density and resulting in a downfield shift. A resonance structure is a theoretical construct in chemistry that describes a molecule or ion with delocalized electrons. It is represented by drawing alternative Lewis structures with the same arrangements of atoms but different locations of electrons. The resulting resonance hybrid is intermediate between these structures and has greater stability than any individual resonance structure due to the delocalization of electrons. Resonance structures are particularly useful for explaining the chemical properties and reactivity of certain molecules, especially those with conjugated pi systems. They are also used to explain phenomena such as acid-base behavior, reaction mechanisms, and molecular orbital theory. Overall, the concept of resonance is an important tool for understanding the electronic structure and properties of many different types of molecules.
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2. Some gold used for jewelry is called '18-karat white gold. This alloy is 75% gold (Au), 12.5%
silver (Ag), and 12.5% copper (Cu). If you wanted to make 25 grams of 18-karat white gold for a
ring, how many grams of each metal would you need to start with?
If you wanted to make 25 grams of 18-karat white gold for a ring then grams of each metal will remain same.
What is gold?Gold has the chemical symbol Au (from Latin: aurum) as well as the atomic number 79. As a result, it is one among the highest atomic number elements found in nature.
Some gold used for jewelry is called '18-karat white gold. This alloy is 75% gold (Au), 12.5% silver (Ag), and 12.5% copper (Cu). If you wanted to make 25 grams of 18-karat white gold for a ring then grams of each metal will remain same.
Therefore, if you wanted to make 25 grams of 18-karat white gold for a ring then grams of each metal will remain same.
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suppose you separate a 2.40 mixture of sand and salt and recover 1.49 g of salt. what is the perecent by mass of salt in the mixture?
The correct answer is
The percent by mass of salt in the mixture is 62.08%
A component in a particular combination or a concentration can be described using the mass percent symbol. The mass of solute present in a certain mass of solution is indicated by the mass percentage used to characterize the solution composition. The concentration of the solute is expressed in units of mass or moles. The mass percent is the ratio of the mass of the solute in a solution to the mass of the entire solution. Since this type of concentration, which is often calculated for solid- and liquid-phase solutions, is reported as a percentage, it must also be multiplied by 100 as shown below.
Minimum (G) 100 equals Mass Percent.
Since a solution consists of both a solute and a solvent, its total mass is equal to the sum of the masses of the two components. As a result, the following equation may also be used to calculate the mass percent of a solution.
Mass Percent = msolute(g), msolvent(g), and msolute(g), multiplied by 100
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in which type of reaction does a more complex compound break down into two simpler substances?
A process whereby a compound is broken down into two or more simpler compounds. Reaction of displacement.
Decomposition reactions: the breaking down of a chemical molecule into less complex elements. These reactions work in opposition to synthesis reactions. Breaking down a highly complex chemical into two or more simpler substances is known as a decomposition reaction. The formula for this reaction is frequently written as AB A + B or C A + B. Everywhere, decomposition reactions take place. Reactions involving decomposition - A reaction in which a single component disintegrates, or decomposes, into two or more simpler substances. One illustration is the electrolysis of water, which occurs when an electric current is carried across it and produces hydrogen and oxygen gas.
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What term describes the electrolyte capacity of pyridine, which partially dissociates in water? C5H5N
Weak electrolyte
Non-electrolyte
Strong electrolyte
Answer:
Weak electrolyte
Explanation:
Weak Bases: NH3, C5H5N etc
The term that describes the electrolyte capacity of pyridine (C₅H₅N), which partially dissociates in water, is a weak electrolyte.
A weak electrolyte is a substance that partially dissociates into ions when dissolved in a solvent, typically water. Unlike strong electrolytes that completely ionize, weak electrolytes only undergo a partial ionization, resulting in a lower concentration of ions in the solution.
In the case of pyridine, it undergoes a partial dissociation in water, producing a small concentration of ions. This means that it conducts electricity to a lesser extent compared to a strong electrolyte, which undergoes complete dissociation and produces a higher concentration of ions.
Therefore, pyridine can be classified as a weak electrolyte.
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Which type of plate boundary is the student modeling? Explain your answer.
The "convergent plate boundary" is the kind of plate boundary that the student is simulating.
What does word boundary mean?This zero-width check between two letters identifies a word boundary. A word character and a non-word letter must be present for the test to be successful. Each figure must appear on one side, regardless of which side they are on.
What are examples of word boundaries?For illustrate, the "three little pigs" went to the market. Indivisibility: Specify a statement and request that someone "add extra words" to it. This additional item will be entered between the words, not before or after them.
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A dog chases a rabbit out of the garden at a speed of 6.0 m/s. If the dog has a momentum of 60.0 kg • m/s then what is his mass
Hi there, here's your answer:
Given the velocity of the dog v = 6.0 m/s
Momentum of the dog P = 60.0 kg m/s
To find:
The mass of the dog.
Solution:
We know that the formula for finding the momentum given the mass of a body and it's velocity is P = m × v.
Substituting the values, we get 60.0 = m × 6.0
Therefore, [tex]m = \frac{60.0}{6.0} = 10kg[/tex]
Thus, the mass of the dog is 10kg.
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what alkene would yield 2,2-dimethoxycyclopentane-1,3-dicarbaldehyde on treatment with o3 followed by (ch3)2s?
The alkene that would yield 2,2-dimethoxycyclopentane-1,3-dicarbaldehyde on treatment with O3 followed by (CH3)2S is 2-methyl-2-pentene.
The reaction scheme is as follows:
2-methyl-2-pentene → O3 → (CH3)2S → 2,2-dimethoxycyclopentane-1,3-dicarbaldehyde.
2-Methyl-2-pentene is an organic compound that belongs to the category of alkenes. It is a saturated hydrocarbon, meaning it contains only single bonds between the carbon atoms. The chemical formula for 2-methyl-2-pentene is C5H10 and it is composed of two carbon-carbon double bonds. It has a boiling point of 63.2 °C, a melting point of -81.2 °C, and a density of 0.719 g/cm3. It is a colorless liquid at room temperature and has a sweet, gasoline-like odor. It is insoluble in water, but it can be dissolved in organic solvents such as ethanol and ether. 2-Methyl-2-pentene is commonly used as a starting material for the synthesis of other organic compounds, such as aldehydes, ketones, and alcohols.
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which of the gases has the fastest‑moving molecules, on average, at a given temperature?
HBr
NO2
C2H6
They all have same average speed
C2H6 is the gas having the fastest‑moving molecules, on average, at a given temperature because of its lower molecular mass
With the chemical formula C 2H 6, ethane is an organic chemical substance. Ethane is a colourless and odourless gas at ordinary temperature and pressure. Ethane is separated from natural gas on an industrial scale, and it is produced as a by-product of the petrochemical process used to refine crude oil.
The mass of a certain molecule is its molecular mass, which is expressed in daltons. Because different isotopes of an element 30.07 g in 1 mole C2H6 are present in different molecules of the same chemical, their molecular weights might vary. As a result, we state that ethane has a molar mass of 30.07 g/mol (grammes per mole).
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Round off the following numbers to three significant figures.
40.009????????
Answer:
40.0
40.009 contains 5 significant figures and 3 decimals. 40.009 rounded to 4 sig figs is 40.01, to 3 sig figs is 40.0, and to 2 sig figs is 40.. To count the number of sig figs in 40.009, count all 5 digits since it has no insignificant digits (all digits are significant).
SEP Develop a Model Mountain climbers need really warm clothing because it
gets colder at higher altitudes. Sketch molecular models for equal-mass samples of
air at different altitudes. Use your models to show why there might be less energy
in the samples at higher altitudes.
Answer:
At lower altitudes, the air molecules are closer together and have more energy due to their increased interactions with each other. At higher altitudes, the air molecules are more spread out and have less energy due to their decreased interactions with each other. This can be represented by sketching molecular models of air at different altitudes.
At lower altitudes, the molecules are represented by a dense, tightly packed arrangement. At higher altitudes, the molecules are represented by a more spread out, less dense arrangement. This difference in density and energy can be seen in the models, and it explains why there is less energy in the samples at higher altitudes.
