A Chemist Dissolves Of Pure Potassium Hydroxide In Enough Water To Make Up Of Solution. Calculate The (2024)

Fats and proteins both contain carbon atoms

The fat molecules are the important biomolecules which consists of carbon and hydrogen atoms. The arrangement of these atoms make the structure of fat hydrophobic which is soluble in organic solvent and insoluble in water.

The proteins are also the vital metabolic biomolecules some of them are regulatory others can be structural in nature. They consists of hydrogen, oxygen and carbon. These biomolecules also contains sulfur, phosphorus and nitrogen in composition.

What are molecules ?

Molecules are made up of one or more atoms. If they contain more than one atom, the atoms can be the same (an oxygen molecule has two oxygen atoms) or different (a water molecule has two hydrogen atoms and one oxygen atom). Biological molecules, such as proteins and DNA, can be made up of many thousands of atoms.

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A 50.0 ml sample of 0.108 m h2so4 is diluted to 250.0 ml. Its new molarity will be 0.0216 m.

Dilution would be the process of lowering a solute's concentration in a solution. It usually just includes combining the solution with much more solvent, such aswater. A solution is diluted when more solvent is added without increasing solute.

Molarity can be calculated by using the formula:

[tex]M_{1} V_{1} = M_{2} V_{2}[/tex]

where, M is molarity and V is volume.

Given data:

[tex]M_{1}[/tex] = 0.108 m

[tex]V_{1}[/tex] = 50 ml

[tex]V_{2}[/tex] = 250 ml

Put the value of given data in above equation.

0.108 m × 50 ml = M × 250ml

M = 0.0216 m

Therefore, the new molarity will be 0.0216 m.

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The volume of the statue = 8 L

The density of the silver = 10.5 per [tex]cm^{3}[/tex]

The mass of the statue is x kg

As we know,

[tex]Density = \frac{Mass}{Volume}[/tex]

Therefore, [tex]10.5 = \frac{x}{8} \\x = 10.5[/tex] × [tex]8 = 84 kg.[/tex]

So, the weight of the statue is heavy. You have to took help of your friend to carry the statue.

The density of a substance indicates how dense it is in a particular area. Mass per unit volume is the definition of a material's density. In essence, density is a measurement of how closely stuff is packed.

It is a special physical characteristic of a certain thing. The Greek scientist Archimedes made the discovery of the density principle.

If you are familiar with the formula and the relevant units, calculating density is simple. The letter D can also be used to signify density instead of the symbol.

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Cis-3-hexene is treated with magnesium monoperoxyphthalate and the product is then subjected to acid-catalyzed hydrolysis. The final product is (2R, 3R)-2,3-hexanediol and (2S, 3S)-2,3-hexanediol

What is hydrolysis?

Hydrolysis is the term for any chemical reaction in which a water molecule dissociates one or more chemical bonds. The expression is a general term for substitution, elimination, and solvation processes where water is the nucleophile.

What happens in the hydrolysis?

Polymers (big molecules) are broken down into monomers during the chemical reaction known as hydrolysis (small molecules). Covalent bonds between monomers are broken during hydrolysis, allowing for the dissolution of polymers. Using water to break covalent bonds is a common practice.

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Answer:

Polar

Explanation:

A polar climate is a place where the climate usually has a temperature below freezing, icy, and covered in snow. These areas do not get direct heat and sunlight from the sun. Polar climates are located at the North Pole of the Arctic, and at the South Pole on the continent of Antarctica.

Hydrogen ion activity of a soil solution at a pH of 6.5 is a hundred times less acidic than a pH of 4.5.

The determination of the hydrogen-ion activity (or pH) of soils is by far the most commonly made soil test.

Within the entire range of soil water content from the moisture equivalent to the soil-to-water ratio of 1:5, the effect of dilution is to increase the pH of suspension of soil, regardless of the initial pH value of the soil or the distilled water used in preparation of the suspensions.

A vacuum tube voltmeter may be either a potentiometric type or a direct-reading pH meter can be used.

Measurements with the potentiometric type of pH meter are independent of the vacuum tube circuit characteristics, and the accuracy of the results depends only on the linearity of the slide-wire.

Both types of pH meters are, however, capable of giving satisfactory results provided that the meter is standardized with two different reference buffer solutions differing in pH by about 2 or 3 pH units.

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Answer:

C12H24

Explanation:

The molar mass of the CH2 unit is 14 g/mole. The final molecule has multiples of CH2 so that it's molar mass is 168 g/mole.

(168 g/mole molecule)/(14 g/mole Unit) = 12 Units

12 CH2 units would make the molecualr formula: C12H24

This is more than one structure that has this formula: Cyclododecane and 1-Dodecene.

6.0 will the pH at the neutralization point of 0.00812 m Ba(OH)2 be when titrated with HCl.

What are titration reactions ?

A titrant/titrator, a standard solution with fixed volume and concentration, is prepared as part of the titration procedure. When an endpoint or equivalence point is reached, the titrant is made to continue reacting with the analyte, and at that point, the amount of titrant consumed may be used to calculate the analyte's concentration. Alternately, titration is the application of the stoichiometry principle to determine an unknown solution's concentration.

The technique begins by adding a very little quantity of analyte to a beaker or Erlenmeyer flask. Under a calibrated burette or chemical pipetting syringe containing the titrant, a little quantity of an indicator (such as phenolphthalein) is inserted.

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According to chemicool, the isotope argon-40, which results from the radioactive disintegration of potassium-40, makes up the great percentage of argon on Earth.

In the current periodic table, argon is estimated to have an average atomic mass of about 39.5 amu, which is extremely near to argon-40.

Radioisotopes are created using argon isotopes primary precursors. The radioactive K-38 that can be employed as a blood supply tracer was made from the argon isotopes Ar-40 as well as Ar-38. The radioactive Ar-41 that is created from Ar-40 is utilized to track gas flows.

Therefore, only two isotopes of argon, Ar-40 and Ar-38 exist in nature. if this were true, the atomic weight of argon 2 amu range.

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Answer:

58.78 g Al₂O₃

Explanation:

To find the mass of aluminum oxide (Al₂O₃) produced, you need to (1) convert grams Fe to moles Fe (via the molar mass), then (2) convert moles Fe to moles Al₂O₃ (via the mole-to-mole ratio from equation coefficients), and then (3) convert moles Al₂O₃ to grams Al₂O₃ (via the molar mass). It is important that the conversions/ratios are arranged in a way that allows for the cancellation of units. The final answer should have 4 sig figs like the given value (64.39 g).

Molar Mass (Fe): 55.845 g/mol

Molar Mass (Al₂O₃): 2(26.982 g/mol) + 3(15.998 g/mol)

Molar Mass (Al₂O₃): 101.958 g/mol

Fe₂O₃(s) + 2 Al(s) -----> 2 Fe(l) + 1 Al₂O₃(s)
^ ^

64.39 g Fe 1 mole 1 mole Al₂O₃ 101.958 g
------------------- x ------------------ x ---------------------- x ------------------ =
55.845 g 2 moles Fe 1 mole

= 58.78 g Al₂O₃

Polysaccharide is a type of carbohydrate (such as glycogen, cellulose, or starch) whose molecules are made up of many sugar molecules bound together.

What purpose does the polysaccharide serve?

In general, polysaccharides serve one of two purposes: they either store energy or sustain structural integrity. Highly compact polymers like starch and glycogen are employed to store energy. In plants and animals, cellulose and chitin, two linear polymers, provide structural support.

What is plant polysaccharide?

More than half of the carbs we consume come from starch, which is the most significant source of carbohydrates in the human diet. Granules of it can be found in plants. Amylose and amylopectin, two polymers, are combined to form starch. 10%–30% amylose and 70%–90% amylopectin make up natural starches.

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Silk and wool are more easily dyed with azo dyes than other fabrics like nylon or cotton because they are polypeptides.

Polypeptides or polymers made of amino acids are what makeup wool and silk. Natural protein fibers like wool and silk, synthetic polyamide fibers like nylon, and, to a lesser extent, acrylic fibers and blends of these fibers, are typically dyed with acid dyes. They are applied to these fibers from a dyebath under acidic or neutral conditions, thus their name. The azo group is the most widely used chromophore in acid dyes. When an ionic bond is formed between the protonated amine group of the fiber and the acid group of the dye, acid dyes that are anionic and soluble in water are applied to wool, silk, and nylon

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A solution containing 572.0ml of 0.6300mhcl is diluted to a volume of 1.000l. the ph of this solution is 0.4432

What is the ph of the given solution?

When the solution has been diluted to a volume of 1.000L, measure the concentration of H3O+ to determine the pH. Next, think about how HCl reacts with water.

HCl(aq)+H2O(l)⟶Cl−(aq)+H3O+(aq)

It is evident that there is exactly the same number of moles of HCl and H3O+ in the solution since the reaction continues to completion. A 0.6300M solution of 572.0 mL made up the initial solution.

Consequently, the following is what a mole of HCl is equal to:

nHCl=(572.0mLHCl)(1.000L/1,000mL)(0.6300MHCl)=0.3604molHCl

The 1:1 mole ratio enables us to see that:

(0.3604molHCl)(1molH3O+/1molHCl)

=0.3604molH3O+

Thus, the H3O+ concentration is as follows:

[H3O+]=0.3604mol/1.000L

=0.3604M

Therefore, the following formula is used to determine the solution's pH:

pH=−log(0.3604)=0.4432

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Explanation:

303k -273k=30°c because 0°c is 273K

Answer:

30 degrees Celsius

Explanation:

303 - 273 = 30.

Reactant A is removed, which suggests that the concentration of A has dropped; as a result, the equilibrium will change to create more A. As a result, it will move to the left, speeding up the reverse reaction

What is Equilibrium?According to equilibrium, if a system's equilibrium is thrown off by altering its temperature, pressure, or concentration, it will move in a direction to reverse the effects of the change.The following equilibrium exists: A + B = ABEquilibrium, commonly known as the equilibrium law , is a chemistry principle that predicts how a change in circ*mstances will affect chemical equilibrium.Chemical equilibrium refers to the situation in a chemical reaction where both the reactants and products are present in concentrations that have no further tendency to change over time, preventing any discernible change in the system's properties.When the forward reaction and the reverse reaction go forward at the same speed, this condition results. The forward and backward reactions typically have equal, if not zero, reaction rates. The concentrations of the reactants and products do not change on a net basis as a result. Dynamic equilibrium is the name given to such a situation.

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Explanation:

look at the picture ......

Lactose, also known as milk sugar, is a disaccharide that contains galactose more frequently. It is present in peas as the monosaccharide. Galactose is a reducing sugar, an aldose, a monosaccharide, and a hexose.

What is Fischer projections and Haworth projections of carbohydrates?

The 3D arrangement of atoms in carbohydrates is depicted using Fischer and Haworth projections, respectively. They are also employed to contrast various carbs.

Fischer projection: The carbohydrate is seen in a Fischer projection as an open chain structure rather than a cyclical one. The main chain of carbon atoms in the carbohydrate molecule is joined vertically, while the horizontal bonds between hydrogen atoms and hydroxyl groups.

Haworth projection: In contrast to a Fischer projection, a Haworth projection depicts the carbohydrate in its cyclical form. This is especially helpful for sugars with rings in their molecules.

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The entropy change for 2.40 moles of HI when it condenses at atmospheric pressure is -199.968 J/mol K

What is the entropy change?

Entropy change is defined as the measure of change of disorder or randomness in a thermodynamic system.

Mathematically, it is given as

[tex]\Delta S = \frac{\Delta H}{T}[/tex]

where ∆S = entropy change

∆H = change in enthalpy

T = temperature

For HI,

Enthalpy of vaporization of HI, [tex]\Delta H_{vap}[/tex] = 19.8 kJ/mol

We also know

Enthalpy of vaporization of HI, [tex]\Delta H_{vap}[/tex] = - Enthalpy of condensation of HI, [tex]\Delta H_{cond}[/tex]

[tex]\Delta H_{cond}[/tex] = -19.8 kJ/mol

HI condenses at -35.36°C

Temperature, T = -35.36°C + 273 = 237.64 K

Substitute in the entropy change formula,

[tex]\Delta S = \frac{-19.8}{237.64}[/tex]

[tex]\Delta S[/tex] = -0.08332 kJ/mol K = -83.32 J/mol K

1 mole of HI has entropy change = -83.32 J/mol K

2.4 moles of HI have entropy change = 2.4 × (-83.32) = -199.968 J/mol K

Thus, The entropy change for 2.40 moles of HI when it condenses at atmospheric pressure is -199.968 J/mol K

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Answer:

C.) Molecular compounds are composed of two or more nonmetals.

Explanation:

A.) is incorrect. Ionic compounds are composed of metal(s) and nonmetal(s). The metal forms the cation and the nonmetal forms the anion. When two metals combine, they create a metallic compound and experience metallic bonding.

B.) is incorrect. Organic compounds are always molecular compounds because they only contain covalent bonds.

C.) is correct. Molecular compounds must be made of two nonmetals and experience covalent bonding. Should a nonmetal and metal come together, they would form an ionic compound and experience ionic bonding.

D.) is incorrect. Organic compounds are always made up of carbon atoms covalently bonded to other atoms, usually hydrogen or other carbon atoms. Therefore, organic compounds do not always contain hydrogen or oxygen.

0.029 M is the concentration of a 57.10 ml solution of HBr that is completely titrated by 35.00 ml of a 0.200 m NaOH solution.

Chemical solution

A solution is a specific kind of hom*ogenous mixture made up of two or more components that are used in chemistry. A solute is a substance that has been dissolved in a solvent, which is the other substance in the mixture. Chemical polarity effects are engaged in the mixing of a solution at a scale that leads to interactions that are unique to solvation. When the solvent makes up a significant portion of the combination, as is frequently the case, the solution typically has the condition of the solvent. The concentration of a solution, which measures how much solute is present in a specific volume of solution or solvent, is one crucial parameter. When water is one of the solvents, the phrase "aqueous solution" is used.

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Bond in which valence electrons are not bound to any particular atom in the solid is known as Metallic Bond.

In metallic bonds, electrons of valence shell do not belong to any any single atom or ion. They exists as cloud of electrons and they are free to drift.

Metallic bonding is responsible for shiny surface, malleability, and their conductivities of metals

The metallic bond becomes weak at melting point and get completely broken at boiling points.

The factors that affect the strength of metallic bonds are number of delocalized electrons, Magnitude of positive charge and Ionic radius of the cation.

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It is important to compare the positive and negative test results with those of known compounds as positive results indicate the presence of that known compound and negative results indicate the absence of that compound which is used for reference.

What is qualitative analysis?

Qualitative chemical analysis is a method to determine the chemical composition of a sample.

There are two types of qualitative analysis:

Organic Qualitative analysis: It helps in determining the chemical bonds and functional groups in a sampleInorganic qualitative analysis: It helps in determining the ions in the given sample

There are seven ways to analyze a sample qualitatively, which are

Change in color Flame testDistillation ExtractionPrecipitationChromatographySpectroscopy

A reference compound is always used to which results are compared.

A Positive result indicates that the reference compound is present in the sample whereas a negative result indicates that the reference compound is absent in the given sample.

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A substance that cannot be broken down into other substances by ordinary chemical procedures is known as an element

What is an Element ?

A chemical element is a species of atoms, including the pure substance made entirely of that species, that have a specific number of protons in their nuclei. Chemical elements, in contrast to chemical compounds, cannot be reduced by any chemical process into simpler molecules.

Each element's atom contains a specific number of protons. For instance, a carbon atom has six protons compared to the one proton in a hydrogen atom. Ions are created by changing the number of electrons in an element's atom.

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The complete question would be:

In a common laboratory experiment in general chemistry, students are asked to determine the relative amounts of benzoic acid and charcoal in a solid mixture. Benzoic acid is relatively soluble in hot water, but charcoal is not. Devise a method for separating the two components in the mixture.

The solution for that would be:

First you put the mixture in hot water and allow the benzoic acid to separate. Next funnel it and then see what's on the funnel paper. Lastly, heat the leftover water and see what's left after it evaporates.

What are laboratory experiments ?Using controlled surroundings to test theories, researchers may develop laboratory experiments. Laboratories are rooms or specially constructed facilities within buildings that are often found on college and university campuses and are utilized for academic research. It's crucial to differentiate between experiments and other kinds of research investigations carried out in lab settings. Even if a research study takes place in a lab, it is not always an experiment. In order to evaluate causal conclusions regarding the links between independent and dependent variables, laboratory studies, like all genuine experimental designs, use procedures of random assignment of participants and control groups.

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A possible solution to solve erosion and/or deposition on a school campus is to replant the surrounding surface with vegetation in order to avoid the loss of soil.

What is erosion?

Erosion is a relatively slow geological process associated with the loss of soil material due to environmental factors such as winds that remove the superficial layer in a given area.

The best solution to solve erosion in a school campus is to surround it with plants in order to avoid direct winds that may erode the soil during the dry period.

In conclusion, a possible solution to solve erosion and/or deposition on a school campus is to replant the surrounding surface with vegetation in order to avoid the loss of soil.

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Answer:

Oxidized

Explanation:

Oxidation and reduction are terms used to describe reactions in which electrons move from one atom or molecule to another atom or molecule. Oxidation occurs when electrons are lost, while reduction occurs when electrons are gained. (The charge is reduced). The two processes are linked, whenever one substance is oxidized another has to be reduced.

Answer:

the bond between oxygen and hydrogen is polar covalent bonds

Methane gas, ch4, effuses through a barrier at a rate of 0.487 ml/minute. if an unknown gas effuses through the same barrier at a rate of 0.294 ml/minute, the molar mass of the gas is 5.83g

Rate of a gas depends upon the molar mass of the given gas molecules in the inverse proportion of its square root.

It is related as mentioned below:

Given,

Rate of Methane= 0.487

Rate of unknown gas =0.294

Molar mass of Methane = 16g

On substituting the given value in the formula:

Rate of Methane / Rate of unknown gas

= [tex]\sqrt{Molar mass of Methane/ Molar Mass of unknown gas}[/tex]

0.487/0.294 = [tex]\sqrt{Molar mass of Methane/ Molar Mass of unknown gas}[/tex]

Molar mass of unknown gas = 5.83g

Hence, the Molar mass of unknown gas is 5.83g.

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The arrangement of the solutions based on their absorption from highest frequency to lowest frequency :

b.[tex]NaN[/tex][tex]O_{2}[/tex] > c.[tex]H_{2} O[/tex] > a.NaCl

What is absorption frequency?The frequency of the molecular vibration that led to the absorption is the same as the absorption frequency of a basic IR absorption band.In a way, an emission spectrum is the opposite of an absorption spectrum. The discrepancies in the energy levels of each chemical element's orbitals correspond to absorption lines for each chemical element at various particular wavelengths. Therefore, it is possible to identify the constituents in a gas or liquid using its absorption spectrum.Absorption spectroscopy is most frequently used to measure infrared, atomic, visible, ultraviolet (UV), and x-ray waves.

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Uranium-238 decays by emission of an alpha particle. the product of this decay is Thorium-234.

The daughter nucleus, thorium 234, is created by the alpha emission of a uranium 238 nucleus. This thorium subsequently changes into protactinium 234 and experiences beta-negative decay to yield uranium 234 as a byproduct.

Thorium-234 is created when uranium-238 conducts alpha decay. The numbers that precede the chemical names indicate how many protons and neutrons are present.Thorium-234 is created when uranium-238 releases two protons as well as two neutrons in this process.

Therefore, Uranium-238 decays by emission of an alpha particle. the product of this decay is Thorium-234.

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