determine the volume in ml of a 0.505 m naoh solution required to titrate 40 ml of 0.25 mh2 so4 solution

Answers

Answer 1

The volume of required NaOH is 39.6 ml

What is normality?

According to the standard definition, normality is expressed as the number of grams or molar equivalents of solute present in one liter of solution. When we say equivalent, this is the number of moles of reactive moieties in the compound.

Base acidity describes the number of ionizable hydroxide groups in the base. NaOH has an ionizable hydroxide group. Hence, the normality of NaOH is 0.5125 N.

For the given case,

N₁V₁ = N₂V₂

Normality = Molarity × Basicity

For H₂SO₄ the basicity is 2

N₂ = 0.25 × 2

= 0.5 N

For NaOH the acidity is 1

N₁ = 0.505 × 1

= 0.505 N

N₁V₁ = N₂V₂

0.505 × V₁ = 0.5 × 40

V₁ = 39.6 ml

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Related Questions

the combined gas law relates volume and temperature. the combined gas law relates volume and temperature. true false

Answers

True, Combined gas law does relates volume and temperature.

The combined gas law is effectively a restructuring of the ideal gas law, where both n (mols of gas) and R (already a constant) remain constant. It can be used to determine how changes in pressure, volume, or temperature can be used to calculate the conditions of the resulting system.

The combined gas law is a combination of the three previously known laws which are- Boyle’s law PV = K, Charles law V/T = K, and Gay-Lussac’s law P/T = K. Therefore, the formula of combined gas law is PV/T = K,

Where P = pressure, T = temperature, V = volume, K is constant.

One can adjust the formula for the combined gas law so as to compare two sets of conditions in one substance. In the equation, the figures for temperature (T), pressure (P), and volume (V) with subscripts of one are representative of the initial condition. Also, those with the subscripts of two are representative of the final condition.

So we can conclude that the combined gas law relates volume and temperature.

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which statement best describes groups and periods of the periodic table? select one: a. groups are vertical columns, while periods are horizontal rows. b. groups are mostly nonmetals, while periods are mostly metals. c. groups are horizontal rows, while periods are vertical columns. d. periods have similar properties, while the properties of groups gradually change.

Answers

The correct statement is "groups are vertical columns, while periods are horizontal rows".

The chemical elements are shown in tabular form on the periodic table, sometimes referred to as the periodic table containing the elements. It is frequently used in physics, chemistry, and some other sciences, and thus is frequently regarded as a symbol of chemistry.

The Periods were the horizontal rows of the periodic table. The periodic table contains seven distinct periods in all. They have the same amount of electron shells and thus are symbolized by the exact overall number of valence electron.

In a periodic table, the horizontal rows were known as periods, while the vertical columns were known as groups.

Therefore, the correct answer will be option (a).

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Answer:

groups are vertical columns, while periods are horizontal rows

Explanation:

if a phosphoric acid solution has a ph of 2.42, what can you tell about the relative concentrations of phosphoric acid and dihydrogen phosphate? the pka for each step in the dissociation of phosphoric acid is given.

Answers

2.00 [H3PO4] [H₂ PO] = 2.00 X [H₂ PO₁]

The first dissociation of phosphoric acid involves the species phosphoric acid, H2 PO4, and dihydrogen phosphate, H2 PO. The formula for the acid dissociation constant is: Ka, =2.42

the logarithm of the log On both sides of the mentioned equation, ka1 =

Pн = PKA + log [H, PO4)

Using definitions

[H3PO4] The renderson equation mentioned above will be utilized to determine the relative concentrations. log PH - Pka, 2.42; [H2 PO] =0.3

I log x = 2 = 109

Thus, X= 2.00 [H3PO4] [H₂ PO] = 2.00 X [H₂ PO₁]

Dihydrogen phosphate is present at higher concentrations than phosphoric acid.

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A climatograph of the Western Sahara is depicted here which shows the average rainfall, low and high temperatures over the course of a year. Which features of the Earth most directly contribute to the climate observed in the Western Sahara? Select ALL that apply.
A The convection currents in the atmosphere deposit warm, dry air at the latitudes that contain the Western Sahara.The convection currents in the atmosphere deposit warm, dry air at the latitudes that contain the Western Sahara.
B The tilt of the Earth on its axis gives the Western Sahara direct sunlight during the summer.The tilt of the Earth on its axis gives the Western Sahara direct sunlight during the summer.
C The gravitational pull of the Moon on the Earth diverts water from desert areas to the oceans.The gravitational pull of the Moon on the Earth diverts water from desert areas to the oceans.
D The revolution of the Earth around the Sun prevents rainfall in the areas on the western parts of large continents.The revolution of the Earth around the Sun prevents rainfall in the areas on the western parts of large continents.
E The rotation of the Earth generates winds that are deflected as the Earth moves.

Answers

The features of the Earth that most directly contribute to the climate observed in Western Sahara are:

"The convection currents in the atmosphere deposit warm, dry air at the latitudes that contain Western Sahara.The convection currents in the atmosphere deposit warm, dry air at the latitudes that contain Western Sahara." (Option A) ; and "The rotation of the Earth generates winds that are deflected as the Earth moves." (Option E).

What is Climate?

Climate is an area's long-term weather trend, often averaged over 30 years.

More precisely, it is the average and variability of climatic variables across temporal periods ranging from months to millions of years.

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given the table below that shows student's examples of proposed models of the atom: which model correctly describes the locations of protons and electrons in the wave-mechanical model of the atom?

Answers

The model accurately depicts where protons and electrons are in the wave. The proton is in the nucleus and the electron is where it is most likely to be. This is the mechanical model of the atom.

The electron was expected to move in circular orbits according to the Bohr model. On the other hand, orbitals are used in the wave mechanical model to characterise the electron positions. The two are not the same. Protons are located inside the nucleus in the wave mechanical model of an atom, but electrons are present where they are most likely to be.

A subatomic particle with a negative charge is an electron. A subatomic particle having a positive charge is called a proton. The strong nuclear force holds protons together in the nucleus of an atom. A type of subatomic particle without charge is the neutron (they are neutral).

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15) in ketose sugars, ring formation can occur because the ketone group reacts reversibly with a hydroxyl group in an aqueous solution. this process is termed . a) hemiacetal formation b) hemicarbation c) mutarotation d) a and c only e) a and b only

Answers

in ketose sugars, ring formation can occur because the ketone group reacts reversibly with a hydroxyl group in an aqueous solution. this process is termed " mutarotation".

A shift in the homeostasis between distinct anomers inside the solution causes mutarotation, which is a variation in the specific rotation with plane-polarized light. A hemiketal and hemiacetal group is required for any molecule to exhibit mutarotation. The earliest known example of mutarotation occurred in sugar.

When the matching stereocenters likely to recidivate, the equilibrium among two anomers changes, causing the optical rotation to change. This is known as mutarotation. The interconversion of the and anomeric forms causes the rotation of cyclic sugars.

Therefore, the correct answer will be option (C)

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What is the product of the reaction between
Aluminum and lodine?
12 (iodine gas)?

Answers

Answers:

Aluminium Iodide

(AlI³)

how many milliliters of a stock solution of 2.00m mgso4 would you need to prepare 100.0ml of 0.400m mgso4

Answers

The volume of 2.00 M MgSO₄ is 20.0 mL.

Parameter

M₁ = 2.00 MM₂ = 0.400 MV₂ = volume of 0.400 M MgSO4 = 100.0 mL

If we added water to the first solution, the concentration changed but the mole in that solution didn't change.

Formula between mole, volume, and concentration (molarity)

[tex]M = \frac{n}{V}[/tex]

n = M×V

n = moleV = volume (mL)M = concentration (Molar)

n₁=n₂

M₁×V₁ = M₂×V₂

2.000×V₁ = 0.400×100.0

2.000×V₁ = 40.0

[tex]V_1 = \frac{40.0}{2.000}[/tex]

V₁ = 20.0 mL

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Is a Covalent bond stronger than an Ionic Bond?

Answers

Answer:

yes

Explanation:

because of the close sharing of pairs of electrons

Answer:

Because of the close sharing of pairs of electrons (one electron from each of two atoms), covalent bonds are stronger than ionic bonds.

Explanation:

Ionic bonds are formed by the complete transfer of electrons and covalent bonds are formed by sharing of electrons. The force between ionic bonds is electrostatic force, while that in covalent bonds is Van der Waals force. Generally, ionic bonds are much stronger than covalent bonds. In ionic bonds, there is a complete transfer of electrons between elements to form a stable compound. While in a covalent bond, there is only sharing of electrons between two elements to form a stable compound. The force that keeps the ions together is the electrostatic force and the force that keeps the elements together bonded with covalent bonds is the Van Der Waals force. As there is a complete transfer of electrons in ionic bonds, cations and anions are formed. Thus there exists a huge electrostatic force of attraction between these ions.

which is the major product of the reaction of ethyl grignard and propiophenone (ethyl phenyl ketone)?

Answers

2-Methyl-butan-2-ol is the major product of the reaction of ethyl grignard and propiophenone (ethyl phenyl ketone).

What type of reaction is Grignard?

The nucleophile in a keto or aldehyde is coupled to alkyl, ethyl ester, vinyl, or allylic halides in the Fermentation process, an organo combination of carbon monoxide. It takes place in this process for carbon-carbon bonds to form.

What purpose does Grignard reagent serve?

It is possible to count the halogen atoms in a halide compound using Grignard reagents. For the chemical examination of several glycerides as well as numerous cross-coupling processes for the synthesis of various dioxide and carbon-heteroatom linkages, Grignard degradation is employed.

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The concentration of a solution of sodium hydroxide is 0.10 mol/dm3. What is the concentration of the solution in g/dm3?​

Answers

The concentration of solution of sodium hydroxide is  4 g/dm³ as per the molar concentration concept, to convert mole/dm³ to g/dm³ multiply the concentration by molar mass, which is 40 g.

What is molar mass?

Molar mass of a compound or a molecule is defined as the mass of the elements which are present in it.The molar mass is considered to be a bulk quantity not a molecular quantity. It is often an average of the of the masses at many instances.

The molecular mass and formula mass are used as synonym for the molar mass.It does not depend on the amount of substance which is present in the sample.It has units of gram/mole.

Molar masses of an element are given as relative atomic masses while that of compounds is the sum of relative atomic masses which are present in the compound.

The molar mass of sodium hydroxide is 40 g thus, concentration in mole/dm³×40, that is 0.10×40= 4 g/dm³.

Thus , the concentration in g/dm³ is 4 g/dm³.

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is it possible to prepare 1-chloro-2,2-dimethylpropane in high yield by halogenation of an alkane? how many monohalo isomers are possible upon radical halogenation of the parent alkane?

Answers

By halogenating an alkane, it is feasible to produce high yields of 1-chloro-2,2-dimethylpropane. Therefore, following radical halogenation of the parent alkane, only one monohalo isomer is feasible.

A double-branched chain alkane containing five carbon atoms, neopentane is also known as 2,2-dimethylpropane. Neopentane is a flammable gas at ambient pressure that, on a chilly day, in an ice bath, or when compressed to a higher pressure, can condense into a highly volatile liquid known as dimethylpropane. In organic chemistry, an alkane is an acyclic saturated hydrocarbon, sometimes known as paraffin (a historical quaint word that also has various meanings). In other terms, an alkane is made up of carbon and hydrogen atoms that are all grouped in a tree form.

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explain why atoms only emit certain wavelengths of light when they are excited. check all that apply.

Answers

Answer:

Explanation:

Atoms emit light because excited electrons are returning to lower energy states, emitting the energy difference :- Bohr model. This energy always has a specific wavelength because the electrons can only exist in set orbits.

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calculate the theoretical yield of strontium sulfate when 525 ml of 1.199 m sulfuric acid is added to 23.66 grams of strontium bromide

Answers

The theoretical yield of strontium sulfate will be 16.47g.

The theoretical yield here can be calculated as:

The grams of sulfuric acid present calculated using formula; molarity = given mass/molar mass/ volume of solution (L)

This will give 61.73 g of sulfuric acid.

In the balanced chemical reaction 1 mole of strontium bromide react with 1 mole of sulfuric acid to give 1 mole of strontium sulfate and 2 moles of hydrobromide. Molar mass of strontium sulfate is 183g/mol and strontium bromide is 246g/mol.

calculating number of moles by using given mass/molar mass; we get

0.09 moles of strontium bromide and 0.63 moles of sulfuric acid.

Thus as 1 mole of strontium sulfate is produced thus: 1*0.09*183 = 16.47g

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what type of evidence have scientists collected and studied from deep ice cores that shows a correlation between changes in global climate with methane and carbon dioxide levels?

Answers

A correlation between changes in global climate with methane and carbon dioxide levels is Variations in ice layer color and thickness.

Ice cores provide direct information about how greenhouse gas concentrations have changed in the past, and also provide direct evidence that climate can change rapidly. By examining the gas trapped in the ice core, scientists learned the amount of carbon dioxide for the first time.

Global temperature has been associated with at least the last million years of Earth's history. A particularly powerful correlation technique is to use the composition of atmospheric gases trapped in ice bubbles. Since most gases remain in the atmosphere long enough to be well mixed on a global scale, ice cores around the world simultaneously exhibit the same atmospheric composition with trapped gas bubbles.

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copper(i) iodide (cui) is often added to table salt as a dietary source of iodine. how many moles of cui are contained in 1.00 lb (454 g) of table salt containing 0.0100% cui by mass?

Answers

Copper(i) iodide added to table salt as a dietary source of iodine. 0.238mm of CuI are contained in 1.00 lb (454 g) of table salt containing 0.0100% CuI.

What is molar mass?

Mass per mole is a definition of molar mass. Molar mass is the total mass of all atoms in substance that makes up a mole. It is measured in gram-per-mole units.

In the case of single elements or individual atoms, the molar mass is just the element's mass given in atomic mass units. Atom's atomic mass and molar mass are exactly equal.

Given,

Mass of table salt is 1.00 lb = 454 g

Copper(I) Iodine (CuI) present in the table is 0.0100% by mass or

CuI present in the 1 pound of salt = 0.01% of 454 g = 0.0454 grams

Now,

Molar mass of CuI = 63.54 grams + 126.90 grams

Molar mass of CuI = 190.44 grams

∴ number of moles of CuI present in 1 pound salt = Mass / Molar mass

Moles of CuI= 0.0454 / 190.44

Moles of CuI = 2.38 × 10⁻⁴ moles

Moles of CuI = 0.238 millimoles

∴ Moles of CuI present is 0.238mm.

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consider a situation in which you analyze a mixture of the starting alcohol and the alkene product of an elimination reaction using tlc. if you used a reverse phase tlc plate, which compound would have the higher retention factor? group of answer choices the alkene

Answers

Alcohol would have the higher retention factor .

What is Alcohol ?

A molecule that can be found in alcoholic beverages like beer, wine, and liquor. Additionally, it can be discovered in several medications, mouthwashes, home goods, and essential oils. It is produced through the chemical process of fermentation, which makes use of yeast and sugar.

The four different forms of alcohol are rubbing, isopropyl, denatured, and ethyl. Ethyl alcohol, commonly known as ethanol or grain alcohol, is the one that we are most familiar with and adore. It is produced by fermenting sugar and yeast and is a component of beer, wine, and alcoholic beverages.Alcohol found in beverages is known as ethanol. It is created when the carbohydrates in grains, fruits, and vegetables are fermented by yeast. For instance, the sugar in potatoes is used to make vodka and the sugar in grapes to make wine.

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what is the stock system name for N2O3, CO, SO3

Answers

Answer:

N2O3= Dinitride Trioxide

CO= Carbon Oxide

SO3= Sulfide Trioxide

Explanation:

Di= 2

Tri= 3

In Spain, the legal blood alcohol limit is 250 of alcohol per 1 L of breath. What is this alcohol concentration in parts per billion, ppb?

Answers

The alcohol concentration in parts per billion, ppb given that the alcohol limit is 250 of alcohol per 1 L of breath is 25×10¹⁰ ppb

How do I determin the concentration in ppb?

The concentration of substance in parts per million, ppb can be obtained by using the filling formula:

Concentration (in ppb) = (amount of solute / volume) × 10⁹

With the above formula, we can obtain the alcohol concentration in parts per billion, ppb as shown below:

The concentration of the vitamin C in ppb can be obtained as follow:

Amount of alcohol = 250Volume = 1 LConcentration (in ppb) =?

Concentration (in ppb) = (amount of solute / volume) × 10⁹

Concentration (in ppb) = (250 / 1) × 10⁹

Concentration (in ppb) = 25×10¹⁰ ppb

Thus, the concentration in ppm is 25×10¹⁰ ppb

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Oxygen is important in the oxidation of glucose because it ____________________________.

Answers

Oxygen is important in the oxidation of glucose because it involves breakdown of glucose in presence of oxygen to produce a large amount of energy.

Glucose oxidation breaks down glucose to create energy.  Oxidation of glucose in the presence of oxygen is called respiration. Oxidation means addition of oxygen to a molecule. Respiration is the chemical process by which organic compounds change into different reactions. Glucose reacts with molecular oxygen to produce carbon dioxide and water. The carbon atoms in glucose are oxidized. It produces less amount of energy in absence of glucose. Presence of oxygen in glucose breakdown produces carbon dioxide and water along with the release of large amounts of energy. So, oxygen is necessary for glucose breakdown.

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what absorbance did you record for spinach at 400 nm?6.25 points question 2what absorbance did you record for spinach at 420 nm?6.25 points question 3what absorbance did you record for spinach at 440 nm?

Answers

It was discovered that the photosynthetic pigment in spinach best absorbed light between the wavelengths of 400 and 450 nm as well as at 650 nm. Additionally, it was discovered that this green phototroph barely absorbed light at wavelengths about 550 nm.

What is Absorbance ?

The logarithm of the ratio of incident to transmitted radiant power through a sample is known as absorbance. As an alternative, absorbance can be defined as "the negative logarithm of one minus absorptance, as measured on a homogeneous sample," for samples that scatter light.

The opposite of transmittance, or absorbance (A), indicates how much light the sample absorbed. Additionally known as "optical density." A logarithmic function of T is used to compute absorbance: A = log10 (1/T) = log10 (Io/I).The concentration of the molecule (C) and the sample's path length (L), which is typically equal to the cuvette's path length, combined make up the three factors that affect an absorbance value. The extinction coefficient () is the next factor.

What is the absorbance of Spinach ?

The disks will rise as a result of bubbles developing on their surface when the leaves create oxygen. The leaves eventually sink if the cup's light source is taken away.

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find the molality of the solution if 42 grams of potassium chloride (kcl) are dissolved in 3.6 kg of water.

Answers

When 42 grams of potassium chloride (kcl) are dissolved in 3.6 kilogram of water, the resulting solution has a molality of 0.156 m.

Describe molality.

The term "molal concentration" is another word for molality. It measures the solute concentration in a solution. There are a variety of terminology that can be used to describe a solution's concentration, including molarity, molality, normality, formality, volume percentage, weight percentage, and parts per million. The term must determine the molecular weight of the solute and the mass of the solvent.

Molality is the best method for transferring concentration since the mass of the solute and solvent in the solution is constant.

Molality = moles of solute/ liters of solution

Moles of KCl = (42g KCl) x (1 mole KCl/74.5513 g) = 0.5633 moles KCl

Water in kg = 3.6 kg

m = 0.5633/3.6

m = 0.156

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DART sent images from a camera to record its progress.

How were the collision and the results of the collision recorded?

Answers

DART sent images from a camera to record its progress. The collision and the results of the collision were recorded by the International Space Station.

What is DART?

DART stands for Double Asteroid Redirection Test. The investigative team of the (DART) mission indicates that the spacecraft's kinetic contact with its target asteroid, Dimorphos, successfully changed the asteroid's orbit.

Asteroid is a small planet in our Solar System. Asteroids range in size and shape from 1-meter boulders to a dwarf planet almost 1000 kilometers in diameter; they are stony, metallic, or ice worlds with no atmosphere.

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2. Which type of intermolecular force accounts for each of
these differences?
a) CH3OH boils at 65°C whereas CH₂SH boils at 6°C.
b) Xe is a liquid at atmospheric pressure and 120 K whereas Ar is a gas under the same conditions.
c)Kr, atomic mass is about 84 amu, boils at 120.9 K, whereas Cl₂, molecular mass about 71 amu, boils at
238 K.

Answers

At atmospheric pressure and 120 K, Xe is a liquid, whereas Ar is a gas at the same circumstances.

The right response is B.

What distinct intermolecular forces are there between each other?

Intermolecular forces can be divided into three categories: hydrogen bonds, dipole-dipole interactions, and London dispersion forces (LDF). Despite the fact that molecules can have any combination of these three types of intermolecular forces, all substances at least contain LDF.

What are the four distinct intermolecular force types?

These are the four principal intermolecular forces: Van der Waals dipole-dipole interactions > Ionic bonds > Hydrogen bonds > forces of Van der Waals dispersion.

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Which property would cesium most likely have?
It is hard.
It is ductile.
It is a gas.
It has low reactivity.

Answers

Answer:

It is ductile.

Explanation:

Cesium belongs to group 1 on the periodic table, meaning it is an alkali metal, not a gas. Alkali metals are soft, malleable, and ductile. They are good conductors of heat and highly reactive in nature, meaning cesium is also highly reactive. Therefore, the only option that would make sense is "It is ductile."

You are making a glass of Kool-Aid. You put 2 tablespoons of sugar, stir it until all the sugar is dissolved and then taste it. You realize it is not sweet enough so you add 10 more tablespoons of sugar and stir it. You notice that there are still solids in the glass. Do these solids indicate that a chemical reaction occurred?

Yes because you saw solids form and the color change, which indicates a chemical reaction.

No because the solids are not a new substance.

Yes because the solids are a new substance that formed between the Kool-Aid and water.

No because a chemical reaction has to show a change in denisty.

Answers

Yes because the solids are a new substance that formed between the Kool-Aid and water.

The solids are a new substance which indicate that a new substance is formed between the Kool-Aid and water as the chemical reaction has occurred between these two substances.

What is a chemical reaction?

Chemical reaction is defined as a reaction which occur when a substance combines with another substance to form a new substance.Alternatively, when a substance breaks down or decomposes to give new substances it is also considered to be a chemical reaction.

There are several characteristics of chemical reactions like change in color, change in state , change in odor and change in composition . During chemical reaction there is also formation of precipitate an insoluble mass of substance or even evolution of gases.

There are three types of chemical reactions:

1) inorganic reactions

2)organic reactions

3) biochemical reactions

During chemical reactions atoms are rearranged and reactions are accompanied by an energy change as new substances are formed.

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a soluble iodide was dissolved in water. then an excess of silver nitrate, , was added to precipitate all of the iodide ion as silver iodide, . if g of the soluble iodide gave g of silver iodide, how many grams of iodine are in the sample of soluble iodide? what is the mass percentage of iodine, , in the compound?

Answers

Answer:

a: 1.181grams of iodine are present in the sample of soluble iodide.

b: 76.44 percent iodine is the mass percentage of iodine when excess silver nitrate was added to precipitate all of the iodide ions

Explanation:

We know that when silver reacts with halides it forms precipitate, silver when reacts with iodine it forms a yellow coloured precipitate of silver iodide which is an inorganic compound soluble in water. One odd characteristic of silver iodide is that it is photosensitive and may form metallic/dark silver if exposed to light. One of the most renowned albeit controversial use of silver iodide is that it is used to generate rain through clouds

Ag+ (aqueous)+ I−(aqueous) →AgI(s) yellow precipitate

2.185g x  (1 mole of AgI / 234.77 AgI)  x (1 mole Iodine/1 mole AgI)  x (126g of Iodine/1 mole of I)

= 1.181g

b)Now, mass percentage can be obtained by using the following formula

mass percentage = mass of solute/mass of solution x 100

iodine mass percent = (mass of iodine/mass of soluble iodide) x 100

= (1.181/1.545) x 100 = 76.44 %

mass percentage is the mass of the element/solute divided by the mass of compound or solution ,then the result is multiplied to get the answer. It can be defined as the weight of solute in a particular weight of solution.

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suppose that 0.250 mol of methane, ch4(g) , is reacted with 0.400 mol of fluorine, f2(g) , forming cf4(g) and hf(g) as sole products. assuming that the reaction occurs at constant pressure, how much heat is released?

Answers

The heat released after the reaction is -184.79 kJ

The chemical reaction between methane and fluorine is

[tex] CH_{4}[/tex] + 4[tex] F_{2}[/tex] -> [tex] CF_{4}[/tex] + 4HF, where reactants are methane and fluorine. The products are carbon tetrafluoride and hydrogen fluoride.

The limiting reactant is hydrogen fluoride. Number of moles = (0.440 × 4)/4, here 4 is the number of moles of hydrogen fluoride and fluorine

Performing multiplication and division

Number of moles = 0.440 moles of HF

Enthalpy of reaction = -1679.54 kJ

Heat released = (0.440 × -1679.54)/4

Performing multiplication and division to find the heat released

Heat released = -184.749 kJ

Thus, the heat released is -184.79 kJ

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a five part per million standard has a percent transmission on a spectrometer of 34.780. what is the absorbance?

Answers

The absorbance of the sample with 34.780 percent transmittance is 3.54

What is transmittance?

Transmittance is the fraction of the incident light which passes through the sample and comes out successfully. In spectrometer, the detector detects the amount of light coming out of the sample and converts the reading into digital display. Absorbance is the fraction of the light which is being absorbed by the given sample.

The absorbance of the sample is,

A = 2 - log (-% T)

where, A = absorbance, %T = transmittance

A = 2 - log (-34.780) = 2 - (-1.54) = 3.54

Therefore, the absorbance of the sample having 34.780 percentage transmittance is 3.54.

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Write the structural formula of compound formed by replacing one hydrogen with OH group from ethane.​

Answers

The structural formula of the compound formed by replacing one hydrogen with the OH group from ethane is Ethanol.

The alkane are the compound in which carbon atoms connected with single bond and carbon and hydrogen single bond . alkanes are called as saturated hydrocarbon. we use prefix eth for the two carbon atom and suffix ane for alkane .the ethane is alkane. The OH group is functional group called as hydroxy group. The suffix use for hydroxy group is ol.

CH₃ - CH₃   + OH ----->    CH₃ - CH₂OH

     ethane                                ethanol

Thus, The structural formula of the compound formed by replacing one hydrogen with the OH group from ethane is Ethanol.

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