no.of elements in KMnO4​

The freezing point of a solution of 60 g of glucose dissolved in 80 g of water is −7.74 oC.

The number of moles of glucose =Mass of glucose / Molecular weight of glucose

​=  60 g /180 g/mol

= 0.333 mol

The molality of glucose solution =

Number of moles of glucose / Mass of solvent (in kg)

= 0.333 mol/ ( 80 g/ 1 kg/ 1000g)

= 4.163 mol/kg

The depression in the freezing point of glucose solution :

ΔTf=K fm

=1.86K kg /mol×4.163 mol/kg

=7.74 K

The freezing point of pure water is 0 o C

The freezing point of glucose solution

= 0−7.74

= −7.74 oC

Therefore, the freezing point of a solution of 60 g of glucose dissolved in 80 g of water is −7.74 oC.

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IR Spectroscopy measures the vibrations of atoms, and based on this it is realizable to determine the functional groups.

CO, absorb in the IR spectrum. More compound molecules have many bonds, and their fluctuation spectra are correspondingly more composite, i.e. big molecules have many peaks in their IR spectra., stronger bonds and light atoms will vibrate at a high extended frequency

Nature rules that only bonds that carry dipoles can absorb infrared light. C-C bonds are normally nonpolar and usually do not show up as summit in the IR spectrum.

So we can conclude that The chart above shows a spectrum in transmission mode.

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Three levels of electron energy are present in the magnesium atom (shells).

Magnesium and aluminum are a desired alloy because it combines strength and lightweight while having a lower density than aluminum. All cells and almost 300 enzymes depend on this element, which is the tenth most prevalent element by mass in the human body. An atom's mass is its atomic mass. Because it relates to the mass of a single particle, the atomic mass or relative isotopic mass is associated with a particular isotope of an element. Magnesium has an atomic mass of 24.305 u. Magnesium's typical isotopes have masses of 24, 25, and 26. 12 is the atomic number.

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The product of the chemical equation  involving methane and chlorine will subsequently form CH₂Cl₂ which on further reaction with chlorine will form CCl₄.

Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.

A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .

The first chemical equation was put forth by Jean Beguin in 1615.By making use of chemical equations the direction of reaction ,state of reactants and products can be stated. In the chemical equations even the temperature to be maintained and catalyst can be mentioned.

The chemical equations involved are CH₄ +Cl₂[tex]\rightarrow[/tex]CH₃Cl +HCl

CH₃Cl +Cl₂[tex]\rightarrow[/tex]CH₂Cl₂ +HCl

CH₂Cl₂+Cl₂[tex]\rightarrow[/tex]CHCl₃+HCl

CHCl₃+Cl₂[tex]\rightarrow[/tex]CCl₄+HCl

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4-Chlorobut-1-ene with HBr (a)

In this reaction, an alkene is present. Thus, there will be an addition reaction in which the most substituted carbon will get the addition of the nucleophile "". Here, carbon 3 results in 3-bromo-1-chlorobutane.

1-Chlorobut-1-ene with HBr (b)

We additionally have an alkene in this reaction. Thus, there will be an addition reaction in which the most substituted carbon will get the addition of the nucleophile "". Here, carbon 2 creates 2-bromo-1-chlorobutane.

(c) H2O, H+, and 4,4-Dimethylcyclopentene

In this reaction, an alkene is present. Thus, there will be an addition reaction in which the most substituted carbon will get the addition of the nucleophile "". 3,3-dimethylcyclopentan-1-ol is produced in this instance from carbon 3.

Propyne with 2HCl (d)

In this reaction, an alkyne is present. We will therefore experience an additional reaction.

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The m in 6.0 m refers to the molality of the solution, which is a measure of the amount of solute (in moles) dissolved in a given amount of solvent (in kilograms).

The concentration of a 6.0 m solution can also be expressed as 6 moles of solute per kilogram of solvent (6 mol/kg).The molality of a solution is important to consider when determining the concentration of a solution because it takes into account the mass of the solvent and the amount of solute dissolved.

For example, a 6.0 m solution would have a higher concentration than a 3.0 m solution, even though they both contain the same amount of solute. This is because the 6.0 m solution has twice as much solute dissolved in the same amount of solvent.

In addition to giving the concentration of a solution, the molality can also be used to calculate the freezing point depression, boiling point elevation, and osmotic pressure of a solution. Knowing the molality of a solution can therefore be very useful in many different applications.

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Boiling point of solution when 0.6 g of urea is dissolved in 100g of water, is 100.052°C.

Urea mass = 0.6 g

Water's mass is 100 g, or 0.1 kg, and its molarity is 0.6/60*0.1, or 0.1 M.

Boiling point increase = Tb

Boiling point of the solution is calculated as Kb*m = 0.52*0.1 = 0.052 K.

Pure water has a boiling point of T = 373 K.

Tb = Tb - T Tb

= Tb + T 373 + 0.052

= 373.052 K

= 100.05 °C

Consequently, the solution's boiling point is 100.052°C.

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Complete question: When 0.6g of urea dissolved in 100g of water, the water will boil at (Kb for water=0.52kJ.mol −1 and normal boiling point of water =100 ∘ C).

The chemical reaction takes place when a substrate is chemically altered by an enzyme after entering the active site of the enzyme.

At the enzyme's catalytic site, which is where the reaction takes place, this chemical modification of the substrate occurs. The substrate may engage in a number of chemical reactions at the catalytic site, such as the transfer of a chemical group or the breaking or forming of chemical bonds. The enzyme and the substrate in question determine the specific kind of chemical reaction that occurs.

One or more products are produced as a result of the chemical modification of the substrate and are then released by the enzyme. The chemical is then accessible to tie and catalyze the response with extra substrate atoms.

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intermolecular forces present in water

1- H bonding      2- Dipole Dipole interaction         3- London dispersion forces.

Polar O-H bonds exist in water. The negative O atoms in nearby molecules attract the positive H atoms, resulting in the unexpectedly powerful type of dipole-dipole force known as a hydrogen bond. Water has dipole-induced dipole and London dispersion forces because it has hydrogen bonds.As a result, the intermolecular forces in water are -1- Hydrogen bonding 2-Dipole interaction 3- Dispersion forces in London.Dipole-dipole conversations are sluggish interactions that take place when perpetual or induced dipoles arrive into close vicinity. These forces are referred to collectively as Dipole - Dipole interaction. Proteins contain large quantities of the these interactions, the resilience of which varies greatly. Polar molecules are diplexer molecules that are abundant in nature.

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Answer:

1.1 for 3d, 0.76 for 16d.

Explanation:

You divide the mass of one nail by the nail size.... I think

The cells contain the same text as red oval are 5.

A string is a sort of data in computer science that contains sequences of characters, some of which can take the form of series of integers.

With the exception of the last shape at the bottom right of the figure, all of the forms in the choice have a string of numbers that correspond to the red oval shape.

As a result, we can infer that there are 5 forms that share the same string as the red oval.

Thus, computer science can help solve problem related to complex mathematics with ease.

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The compound NH₄⁺ is tetrahedral in geometry and is non-polar. SO₂ is polar in nature and has a bend shape. CHCl₃ is tetrahedral and it is polar.

Polar compounds are those having a permanent dipole moment. When the atoms bonded together have significant difference in electronegativity the electrons will attracts more to the highly electronegative atom and there occurs a net dipole moment results in polarity.

The ammonium ion NH₄⁺ is a tetrahedral molecule having no polarity. The dipole moments cancel each other due its tetrahedral nature. SO₂ is bend in geometry due to the presence of lone pair of electrons on oxygen atom. It is a polar compound.

The compound trichloromethane has a net dipole moment and it is polar with a tetrahedral structure.

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By using the Fischer Projections, we may depict 3D molecule structures in a 2D setting without affecting their characteristics or structural integrity.

The Fischer Projection is made up of both horizontal and vertical lines, where the horizontal lines stand in for atoms that are pointing in the viewer's direction and the vertical lines for the opposite. The central carbon is shown as the intersection of the horizontal and vertical lines.

The asymmetric carbon atom is located at the line's intersection in the Fischer projection, which resembles a cross. The horizontal lines are seen as wedges or bonds that extend outward in the direction of the viewer. The vertical lines are projected as dashed lines away from the spectator.

Figures a, b, and c hold the molecule such that the chiral center (C), two bonds, which are on a horizontal plane, are coming out of the plane of the paper, and the three remaining bonds, which are on a vertical plane, is going into the plane of the paper.

Hold the molecule as shown in figure (d) so that the two chiral centers (i.e., C) are on the paper's plane, four bonds are coming out of the paper's plane and are on a horizontal plane, and the final two bonds are entering the paper's plane and are on a vertical plane.

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Scope 1 emissions are greenhouse gas (GHG) emissions that are directly caused by an organization's activities. Scope 2 emissions are GHG emissions that result from the generation of electricity, heat, or steam that an organization consumes.

Scope 1 emissions are greenhouse gas (GHG) emissions that are directly caused by an organization's activities. These emissions are emitted from sources that are owned or controlled by the organization, and are a result of the organization's operations. Examples of scope 1 emissions include emissions from fuel combustion in company-owned vehicles and emissions from on-site fuel-fired boilers or heaters.

Scope 2 emissions are GHG emissions that result from the generation of electricity, heat, or steam that an organization consumes. These emissions are often referred to as "indirect emissions" because they are not directly emitted by the organization itself, but rather by the source of the energy that the organization consumes. For example, if an organization consumes electricity from a coal-fired power plant, the emissions from the power plant's fuel combustion would be considered scope 2 emissions for the organization.

Scope 1 and 2 emissions are often referred to as "direct emissions" because they are caused directly by the activities of the reporting organization. In contrast, scope 3 emissions, also known as "other indirect emissions," are those that result from activities that are not under the control or ownership of the reporting organization, but are a part of its value chain.

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Answer:  

the equipment needed to determine the density of a liquid sample is HYDROMETER or AEROMETER .

Explanation:

HYDROMETER is a device which measures the specific gravity( relative density) of a liquid sample. it does not give us direct density .

it is the ratio of the density of liquid to the density of water .

a hydrometer is made up of glass. also,it consists a cylindrical stem and bulb which is weighed with mercury(Hg) or lead(Pb) shot so that it can float .

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Answer:

To determine the density of a liquid sample, you would need a hydrometer.

Explanation:

A hydrometer is an instrument used to measure the density or specific gravity of a liquid.

It works by using the principle of buoyancy, where an object will be buoyed up, or pushed to the surface, by a force that is equal to the weight of the fluid displaced by the object.

The hydrometer has a weighted bulb at one end and a graduated stem. The weighted bulb is placed in the sample liquid and the stem is read to determine the density of the sample.

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Many Europeans were afraid of the tomato in the late 1700s. The fruit was given the moniker "poison apple" because it was believed that aristocracy consumed them and became ill and died, but the truth was that wealthy Europeans used pewter plates, which contained a lot of lead.

What is Poisonous food?

People can become unwell from something they ate or drank and contract food poisoning, one type of foodborne illness. The germs or other toxic components in the meal or drinks are the causes.

Vomiting, diarrhoea, and upset stomach are common signs of food poisoning. Typically, after ingesting the dish, symptoms appear hours or even days later. Most people only suffer minor illnesses, which heal on their own.

Food poisoning can occasionally result in serious sickness or consequences.

All foodborne infections are generally referred to as "food poisoning." To be more particular, a healthcare professional might use the following terms:

All infections caused by tainted food or drink are referred to as "foodborne illnesses."

Toxin-related disease is referred to as "food poisoning" in this context. One sort of foodborne illness is food poisoning.

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A. Carbohydrates - energy storage

B. Lipids - structural support

C. Proteins - transport molecules

D. Nucleic acids - genetic information

Explanation:

To solve for molarity, you would need to change the volume of the solution.

Molarity is a measure of concentration in a solution, and it is calculated by dividing the number of moles of solute (in this case, potassium hydroxide) by the volume of the solution (in liters). The molarity of a solution is usually represented by the symbol "M".

In the given sample, the number of moles of potassium hydroxide (KOH) is 0.0255 mol, and the volume of the solution is 10.0 ml. To solve for the molarity of the solution, you would need to convert the volume from milliliters to liters, and then divide the number of moles of KOH by the volume of the solution in liters to calculate the molarity.

For example, to solve for the molarity of the solution, you could use the following formula:

M = (0.0255 mol KOH) / (10.0 ml / 1000 ml/L)

= 0.00255 M

This would give you the molarity of the solution as 0.00255 M.

Taffi frequently finds herself being cast by her teachers and fellow students in stereotyped and constrained roles, albeit ones that on the surface appear to be favourable. She is a victim of benevolent sexism.

Sexism is bias or discrimination against someone based on their gender or sex. Although it can effect anybody, sexism particularly harms women and young girls. The idea that one sex or gender is inherently superior to another has been connected to stereotypes and gender roles.

Aspects of benevolent sexism include the value placed on gender-stereotypically feminine traits in women (such as nurturing) and the conviction that traditional gender roles are required for cohesion. Paternalism, or the idea that men should protect women, is another example of benevolent sexism.

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The given question is incomplete. The complete question is:

Taffi is majoring in chemical engineering. She is treated differently because of stereotyped behavior and restrictiveness in her role as a student in this major, often in a way that seems superficially beneficial. What is Taffi experiencing?

A. stereotype threat

B. benevolent sexism

C. racism

D. hostile sexism

Taffi constantly observes that her instructors and classmates cast her in stereotypical and limited roles, despite the fact that these roles initially seem to be positive. She is a target of benevolent sexism.

Bias or discrimination against someone because of their gender or sex is known as sexism. Although it affects everyone, sexism has a negative impact on women and young girls in particular. Stereotypes and gender roles have been linked to the notion that one sex or gender is intrinsically superior to another.

The value placed on gender-stereotypically feminine attributes in women (such nurturing) and the idea that traditional gender roles are necessary for cohesion are examples of benign sexism. Another is paternalism, which is the notion that men should defend women.

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The given question is incomplete. The complete question is:

Taffi is majoring in chemical engineering. She is treated differently because of stereotyped behavior and restrictiveness in her role as a student in this major, often in a way that seems superficially beneficial. What is Taffi experiencing?

A. stereotype threat

B. benevolent sexism

C. racism

D. hostile sexism

Answer:

2358.1

Explanation:

I just pressed the calculator :]

10³ = 1000

2.3581 × 1000

=2358.1

Sorry if this didn't help you :)

Answer:

experiments which gases that first became possible at the turn of the nineteenth century legend Dalton in 1803 to propose a modern theory of the atom based on the how did the following assumptions

The shape of oval symbol is a ellipse.

The oval shape symbol depict a elliptical path. Except in the context of projective geometry, the term "oval" as used to describe curves in geometry is not well defined. Commonly referred to as ovals or described as having a "oval shape," several unique curves. Typically, a planar curve must resemble the shape of an egg or an ellipse in order to be referred to as an oval. These unique characteristics of ovals are typical:

They have a shape that is similar to that of an ellipse, are differentiable (smooth-looking), simple (not self-intersecting), convex, closed, planar curves, and an axis of symmetry would often exist in an oval, but it is not necessary.

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The following data from an experiment to ascertain the effect of water temperature on the amount of sugar that dissolves in a beaker of water were present, and the following components were to be identified:

The experiment is divided into three main sections:

So, the correct answer is -

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Complete question:

A student conducted an investigation to determine the effect of water temperature on the amount of sugar that dissolves in a beaker of water. Identify components for trial 1 of this investigation.

structure BrF₂ attached below and it have 20 electron valency.

The Lewis structure of BrF₂⁺ can be illustrated as follows:

Take the valence electron count as the first step.

With 7 valence electrons each, the halogens bromine and fluorine belong to the 17th group of the periodic table.

The bromine atom in BrF₂ has 7 outermost valence shell electrons.

BrF₂ has 7 electrons in the fluorine atom's outermost valence shell.

Due to the presence of two fluorine atoms in bromo difluoride, a total of 7+7(2) = 21 valence electrons are available. and BrF₂⁺ means it donate their proton so there gonna be 20 valence electron.

The second step is to place the least electronegative atom possible in the middle of the molecule.

From the top of the group in the periodic table to the bottom, the value of electronegativity drops. Therefore, the electronegative value of bromine is lower than that of fluorine.

The bromine atom is preserved in the middle of the molecule and is surrounded by two fluorine atoms since it has the least electronegativity.

Then Place two electrons to symbolize a link between the atoms.

Of order for the atoms in a BrF₂⁺ molecule to make bonds with one another, place two electrons between each bromine and fluorine atom.

The remaining unbonded electrons are divided among the atoms to complete the octet.

The BrF₂⁺ molecule contains a total of 20 valence electrons. Four of these are utilised to form bonds with the bromine and fluorine atoms, leaving the remaining 16 electrons unconnected.

To complete the octet, each fluorine atom needs six non-bonded electrons and two electrons from the single bond it created with bromine. The BrF₂⁺ molecule requires 12 non-bonded electrons because it contains two fluorine atoms.

The central bromine atom will continue to receive the remaining five unbonded electrons, and four additional electrons will be used to create the single bond with the fluorine atoms. As a result, bromine gains a total of nine electrons, expanding into an octet.

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A substance that resists changes in pH is referred to as a buffer.

A buffer is a substance that resists changes in its pH when a small quantity of a strong acid or base is added to it.

Buffers are usually prepared from solutions of a weak acid and its conjugate base or a weak base and its conjugate acid.

Buffers are usually found in living organisms as they help living organisms maintain homeostasis.

Some of the buffers found in living organisms include:

The pH of a solution measures the acidity or basicity of the solution.

pH values less than 7 are acidic, while pH values greater than 7 are basic, A pH of 7 is neutral.

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Answer:

The correct statement about the number of protons and neutrons in a nuclear change is: "The relative numbers of protons and neutrons can differ before and after the change, but the total number of those particles remains the same."

Explanation:

In a nuclear change, the total number of protons and neutrons (also known as nucleons) remains constant, but the specific arrangement of those nucleons can change. This can be achieved through processes such as nuclear decay, where an unstable nucleus emits particles and becomes more stable, or through nuclear reactions, where two or more nuclei collide and rearrange to form new nuclei. In either case, the total number of protons and neutrons is conserved, but the specific numbers of protons and neutrons in the resulting nuclei can be different from the original nuclei.

It's important to note that the total atomic mass (also known as the atomic weight) and total charge of a nucleus can change as a result of a nuclear change. The atomic mass is determined by the total number of protons and neutrons in a nucleus, so it will be different if the relative numbers of those particles change. The total charge of a nucleus is determined by the number of protons, so it will be different if the number of protons changes.

Three possible monohalogenation products for this reaction are (Z)-2-bromohex-2-ene, (R)-3-bromo-3-methylcyclohex-1-ene, and (1R,4R)-1,4-dibromocyclohexane.

A substance can be monohalogenation chemically by adding one or more halogens to it. This type of transformation is essential for the production of polymers and pharmaceuticals, among other things, due to the extensive occurrence of compounds containing halides. [1] In fact, this kind of conversion happens so frequently that it is challenging to give a whole explanation. This article's main focus is on how elemental halogens are used in halogenation (F2, Cl2, Br2, I2). Halogen acids and halide salts are commonly used to introduce halides. For the purpose of adding halogens to diverse substrates, including thionyl chloride, a wide range of specialized reagents are available. There are several ways to halogenate organic molecules, including the halogen addition process, electrophilic halogenation, free radical halogenation, and ketone halogenation. The substrate's characteristics determine the route. The halogen has an impact on the halogenation facility. Fluorine and chlorine are more vigorous halogenating agents and are more electrophilic. Iodine is the least reactive of all the halogenating agents, while bromine is weaker than both fluorine and chlorine.

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A material is said to be ductile if it can be hammered or rolled into flat sheets and other shapes

What is ductility?

Therefore, A material is said to be ductile if it can be hammered or rolled into flat sheets and other shapes

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When the concentration of a substance is 0.1, the freezing point depression will be the maximum.

The temperature when a substance changes into a solid is known as the freezing point.. It is the point when the molecules in a liquid gain enough energy to form solid crystals and form a solid. Freezing point depends on the type of substance and the pressure. For example, water freezes at 0°C (32°F) at 1 atmosphere of pressure. However, some substances freeze at temperatures below 0°C and some substances do not freeze solid at all. The freezing point of a substance is an important physical property that can be used to identify it.

This is because the freezing point depression increases with the increase in concentration. The freezing point depression for a 0.1 molar solution is approximately 1.86°C. This means that the freezing point of a 0.1 molar solution is 1.86°C lower than the freezing point of pure solvent. This effect is due to solutes interfering with the hydrogen bonding between molecules of the solvent and therefore decreasing the freezing point.

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