Which of the following substances when boiled with aqueous solution of sodium hydroxide would be hydrolyzed?

i. Protein ii. Fat iii. Polythene

A. i
B. ii
C. i and ii
D. ii and iii
​

Coulomb's law can be applied qualitatively to describe the interactions of ions before they dissociate and the attractions between ions and the solvent after the solution forms.

Coulomb's law states that the force between two charged particles is directly proportional to the product of their charges and inversely proportional to the square of the distance between them.

Before dissociation, ions in a solid are strongly attracted to each other due to their opposite charges. The positive and negative ions are held together in a crystal lattice by electrostatic forces governed by Coulomb's law.

The strength of the attraction depends on the magnitude of the charges and the distance between them.

After the solution forms, when the solid dissolves in a solvent, the ions separate and become surrounded by solvent molecules.

The solvent molecules interact with the ions, creating attractive forces between them. These attractive forces between the ions and the solvent are also described by Coulomb's law.

The magnitude of the charges and the distance between the ions and the solvent molecules determine the strength of the attractions.

In summary, Coulomb's law can be used to explain the interactions between ions before they dissociate in a solid and the attractions between ions and the solvent after the solution forms.

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The initial temperature of the water and copper is 22.51°C.

Mass of ice m = 14 g

We know, 1g = 0.001 kg

So, m= (14 x 0.001)kg = 0.014kg

Mass of water ml = 300g = (300 x 0.001)kg = 0.3kg

Mass of copper calorimeter m₂ = 200g = (200 × 0.001) kg = 0.21 kg

Specific heat of water s₁ = 4186 \(\frac{J}{kg . C}\)

Specific heat of ice s₂ = 2100 \(\frac{J}{kg.C}\)

Specific heat of copper s₃ = 387 \(\frac{J}{kg.C}\)

Latent heat of fusion of water L = 3.33 x 10⁵ \(\frac{J}{kg}\)

Initial temperature of ice T₁ = - 10°C

Initial temperature of water copper is T₂

Final temperature of the system is T = 18 °C

From equilibrium in heat

Heat gain by ice to become 0°C of ice +0°C of ice become 0 °C of water + 0°C of water become 18°C of water = heat loss by copper and water

 ms₂ (0°-(-10°)) + mL + ms₁ (T -0°) = m₁s₁ (T₂-18°) + m₂s₃ (T2 - 18°)

∴ 0.014 × 2100 × 10 + 0.014 × 3.33 × 10⁵+ 0.014 × 4186 × 18 = 0.3 × 4186 × (T₂- 18 ) + 0.2 × 387 × ( T₂ -18 )

∴ 6010.87 = 1333.2(T₂ - 18)

∴ T₂ - 18 = 6010.87 / 1333.2 = 4.51

∴ T₂ = ( 18 + 4.51 )

∴ T₂ = 22.51° C

So, the initial temperature of the water and copper is 22.51°C.

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The unknown compounds are among a restricted set of substances that are provided for you in ascending mp and bp order. Applying your experimental results to these lists will help you narrow down the list of potential chemicals.

Compounds can be recognized by two tests, including

1. Physical assessment

2. Chemical assessment

Physical assessment

This is dependent on outward manifestations and qualities including State, Color, Texture, Smell (odor), Taste, and Feel.

Physical characteristics such as solubility, crystalline or amorphous nature Refractive index, melting point, and boiling point

pH, conductivity, functional groups, and other chemical assessment criteria. utilizing analytical approaches such as spectroscopy analysis and chromatography analysis.

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Answer:

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

\(volume = \frac{mass}{density} \\\)

From the question we have

\(volume = \frac{250}{0.001331} \\ = 187828.70025...\)

We have the final answer as

Hope this helps you

Answer:The zero to the left of a decimal value less than 1 is not significant. All trailing zeros that are placeholders are not significant. Zeros between non-zero numbers are significant.

Explanation:I hoped i have helped u have an wonderful day or night

Answer:

The answer is D

Explanation:

Pls Mark Brainliest

Answer:

Heat is a form of energy that gives the sensation of warmth to us.

Explanation:

Answer:

11 is the atomic number of alkali metal

Explanation:

The Group 1 elements are called the alkali metals. ... All the Group 1 elements are very reactive . They must be stored under oil to keep air and water away from them. Group 1 elements form alkaline solutions when they react with water, which is why they are called alkali metals.

Answer:

1

Explanation:

because you are changing the chemical makeup of the water by pulling out the two chemicals

Methane (CH4) is being considered as an alternative automotive fuel to replace gasoline. To determine the volume of 655 g of CH4 at 20°C (293 K) and 750 torr, use Ideal Gas Law: PV=nRT.

First we need to convert the mass of CH4 (655 g) to moles. The molar mass of CH4 is approximately 16 g/mol, so 655 g of CH4 is about 40.94 moles (655/16). Next, we need to convert the pressure from torr to atm. 1 atm = 760 torr, so 750 torr = 0.987 atm (750/760). Now, we can apply the Ideal Gas Law: (0.987 atm)(V) = (40.94 moles)(0.0821 L atm/mol K)(293 K). Solving for V, we get V ≈ 1046 L. Therefore, 655 g of methane at 20°C and 750 torr occupies a volume of approximately 1046 liters.

According to the Ideal Gas Law, when gases are at the same temperature, pressure, and volume (but not mass), they all have the same number of molecules. Keep in mind that the Ideal Gas rule does not apply when the temperature and pressure are just below the point at which a substance will become a liquid or solid. The combined gas law is made up of the three previously recognised laws:

Boyle's law PV = K,

Charles's law V/T = K,

Gay-law Lussac's P/T = K.

The combined ideal gas law's equation is therefore PV/T = K, where P is pressure, T is temperature, V is volume, and K is a constant.

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Answer: Wheat flour, edible oil, egg white, lettuce preservative, meat or poultry marinade, vegetable antibacterial wash.

Explanation:

hydrogen peroxide is used as a bleaching agent in some food

I hope this helped

The field of study that Christian Doppler's work influenced the most was about light waves.

Hope it helps you.

Answer:

Explanation:

solid would be a wall e.g

liquid would be water e.g

gas would be oxygen e.g

To determine the equation of the parabola that passes through the given points, we can use the standard form of a quadratic equation, which is y = ax² + bx + c.

Substituting the coordinates of the three points into this equation will give us a system of three equations in three variables, which can be solved to find the values of a, b, and c that make up the equation of the parabola. The process is as follows:Substituting (-12, 1333) into the equation, we get: 1333 = a(-12)² + b(-12) + cSimplifying, we get: 1333 = 144a - 12b + c(1)Substituting (4,77) into the equation, we get: 77 = a(4)² + b(4) + cSimplifying, we get: 77 = 16a + 4b + c(2)Substituting (8,403) into the equation, we get: 403 = a(8)² + b(8) + cSimplifying, we get: 403 = 64a + 8b + c(3)Solving equations (1), (2), and (3) simultaneously, we get: a = -3, b = 45, and c = 1427Substituting these values back into the standard form equation, we get: y = -3x² + 45x + 1427Therefore, the equation of the parabola that passes through the points (-12, 1333), (4,77), and (8,403) is y = -3x² + 45x + 1427.

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Answer:

:)

Explanation:

Answer:

c)4 neutrons

Explanation:

The atomic mass of Lithium is 7.

we know,

atomic mass=no. of proton+ no. of neutron

So, no. of neutron = atomic mass - no. of proton=7-3=4

Note: Atomic number is the number of protons.

Hope, this helps you.

Answer:

Frequency is 2Hz

Explanation:

(1a) 3-Chlorophenol is more acidic than cyclopentanol (chlorine atom electron-withdrawal). (1b) Cyclohexanecarboxylic acid is more acidic than cyclohexanol (stronger carboxylic acid group).

(2a) Propan-2-ol is more soluble in water than butan-1-ol and pentan-1-ol (hydrogen bonding ability). (2b) Cyclohexanol is more soluble in water than chlorocyclohexane (hydroxyl group enables hydrogen bonding).

Part 1: Comparing Acidic Strength

a) 3-chlorophenol is more acidic than cyclopentanol. This is because the presence of a chlorine atom in 3-chlorophenol can stabilize the negative charge on the phenoxide ion through inductive and resonance effects, making it more stable and easier to form.

b) Cyclohexanecarboxylic acid is more acidic than cyclohexanol. The carboxylic acid group (-COOH) is a stronger acid functional group compared to the hydroxyl group (-OH) present in cyclohexanol.

c) 2,2-dichlorobutan-1-ol is more acidic than butan-1-ol. The presence of the electron-withdrawing chlorine atoms in 2,2-dichlorobutan-1-ol enhances the acidity by stabilizing the negative charge on the alkoxide ion formed upon deprotonation.

d) Cyclohexanecarboxylic acid is more acidic than cyclohexanol. The carboxylic acid group (-COOH) is a stronger acid functional group compared to the hydroxyl group (-OH) present in cyclohexanol.

Part 2: Comparing Solubility in Water

a) Propan-2-ol is more soluble in water than butan-1-ol and pentan-1-ol. Propan-2-ol has a hydroxyl group (-OH) that can form hydrogen bonds with water molecules, increasing its solubility.

b) Cyclohexanol is more soluble in water than chlorocyclohexane. The presence of the hydroxyl group in cyclohexanol allows for hydrogen bonding with water molecules, enhancing its solubility. Chlorocyclohexane, on the other hand, is nonpolar and lacks the ability to form significant hydrogen bonds with water.

c) Cyclohexanol is more soluble in water than phenol and 4-methylcyclohexanol. Both cyclohexanol and phenol can form hydrogen bonds with water, but phenol's aromatic ring reduces its solubility. 4-methylcyclohexanol is also less soluble than cyclohexanol due to the steric hindrance from the methyl group, which disrupts hydrogen bonding.

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Dr. Ke-Qin Hu, a well-known expert in liver disease and director of UCI Health Liver and Pancreas Services, warns that taking or more four grams of acetaminophen in a 24-hour period could result in severe harm.

Proteins, liver enzymes, & bilirubin are just a few of the things that a liver blood test analyzes in your blood. This can aid in examining the condition of your liver and looking for indications of inflammation of damage. Infections with the liver, such as hepatitis B and C, can have an impact on your liver.

There are numerous nutrients that include certain elements or antioxidants that have been demonstrated to support liver function. The following are a few examples: grapefruit, berries, cranberries, fatty salmon, olive oil, even cruciferous vegetables as broccoli or Brussels sprouts.

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Answer:

An acid and a base.

Explanation:

An acid and a base, combine to form the products salt and water

That is,

Acid + Base ----> Salt + water.

Answer:

Acid and base

Among the given reactions, the one that will have a negative value of ∆S is:
(i) Ba²⁺(aq) + SO₄²⁻(aq) → BaSO₄(s)
A negative value of ∆S indicates a decrease in entropy, which occurs when a system becomes more ordered.

The reaction that will have a negative value of ∆s is (i) ba2 (aq) so42-(aq) → baso4(s). This is because the reaction involves the formation of a solid from aqueous ions, which leads to a decrease in the number of possible arrangements of molecules and a decrease in entropy. In contrast, reactions (ii) and (iii) both involve the formation of gases, which increases the number of possible arrangements of molecules and results in a positive value of ∆s.
In this reaction, the reactants are aqueous ions that combine to form a solid precipitate, resulting in a more ordered state, hence the negative value of ∆S.

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The expected blood gas values for this patient at the time of admission of patient is option E. pH 7.51; PaCO₂ = 20 mm Hg; [HCO₃]⁻ = 24 mEq/L; Anion Gap = 12 mEq/L

A 20-year-old woman presents to the Emergency Department with persistent symptoms of palpitations, dizziness, sweating, and paresthesia. She has a history suggestive of an anxiety disorder.

To assess her condition, blood gases and electrolytes are ordered, and a positron emission tomography (PET) scan is performed. The PET scan reveals increased perfusion in the anterior portion of each temporal lobe. Based on these findings, the doctor prescribes a benzodiazepine medication.

The expected blood gas values at the time of admission can be determined by analyzing the given options:

A. pH 7.51; PaCO₂ = 49 mm Hg; [HCO₃]⁻ = 38 mEq/L; Anion Gap = 12 mEq/L

B. pH 7.44; PaCO₂ = 25 mm Hg; [HCO₃]⁻ = 16 mEq/L; Anion Gap = 12 mEq/L

C. pH 7.28; PaCO₂ = 60 mm Hg; [HCO₃]⁻ = 26 mEq/L; Anion Gap = 12 mEq/L

D. pH 7.28; PaCO₂ = 20 mm Hg; [HCO₃]⁻ = 16 mEq/L; Anion Gap = 25 mEq/L

E. pH 7.51; PaCO₂ = 20 mm Hg; [HCO₃]⁻ = 24 mEq/L; Anion Gap = 12 mEq/L

By evaluating the options, the most appropriate choice is:

E. pH 7.51; PaCO₂ = 20 mm Hg; [HCO₃]⁻ = 24 mEq/L; Anion Gap = 12 mEq/L

This option presents a higher pH (alkalosis) and a decreased PaCO₂ (respiratory alkalosis), which could be consistent with the patient's symptoms of hyperventilation due to anxiety. The [HCO₃]⁻ level within the normal range and a normal anion gap further support this interpretation.

In summary, the expected blood gas values for this patient at the time of admission are a higher pH, decreased PaCO₂, normal [HCO₃]⁻, and a normal anion gap, indicative of respiratory alkalosis likely caused by hyperventilation related to her anxiety disorder.

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Answer:

You are not supposed t9 be cheating

Explanation:

Answer:

ΔT = 0.116 °C

Explanation:

Using Formula

Q = mc ΔT

Where Q = 0.360, c = 4.184 and m = 0.7402

ΔT = Q/mc

ΔT = 0.360/ (4.184)(0.7402)

ΔT = 0.360 / 3.097

ΔT = 0.116 °C

So, The change in Temperature/Increase in Temperature is 0.116 °C

Answer:

pollution

as all the other terms mentioned are beneficial for our biodiversity

The feature in the 1H NMR spectrum that provides information about the relative number of each type of proton in a compound is the integral.

The integral is a feature of the 1H NMR (proton nuclear magnetic resonance) spectrum that represents the area under each peak or signal in the spectrum. It provides information about the relative number of protons contributing to each signal.

In 1H NMR spectroscopy, different types of protons in a compound resonate at different frequencies, known as chemical shifts. The chemical shift is influenced by the electronic environment surrounding the proton and provides information about the chemical environment of the proton.

While the chemical shift gives insight into the type of proton present in a compound (e.g., aromatic, aliphatic, functional groups), it does not directly provide information about the relative abundance or number of protons. The chemical shift alone cannot differentiate between two protons of the same type but in different environments.

On the other hand, the integral provides information about the relative number of protons in each distinct environment. The integral values are determined by the integration of the area under each signal or peak in the spectrum. The relative heights or areas of the peaks correspond to the ratio of protons contributing to each signal.

By comparing the integrals of different signals in the 1H NMR spectrum, one can determine the relative ratio of protons present in the compound. This information can be helpful in deducing the structure of the compound and understanding the connectivity and symmetry of the molecule.

The integral is the feature in the 1H NMR spectrum that provides information about the relative number of each type of proton in a compound. By analyzing the integrals of the different signals, one can gain insight into the relative abundance and ratio of protons in different environments within the molecule.

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Answer:

8.1293534120006496

Explanation:

hope this helps

The titration of 25.0 ml of an unknown concentration h2so4 solution requires 83.6 ml of 0.24 m lioh solution. 0.20M is the concentration of the h2so4 solution (in m).

We'll begin by calculating the number of mole of LiOH in 83.6 mL of 0.12 M LiOH solution.

Volume = 83.6 mL = 83.6 / 1000 = 0.0836 L

Molarity of LiOH = 0.12 M, Mole of LiOH =?

Mole = Molarity × Volume

Mole of LiOH = 0.12 × 0.0836, Mole of LiOH = 0.010032 mole

Next, we shall determine the number of  mole of H₂SO₄ needed to react with 0.010032 mole of LiOH.

2LiOH + H₂SO₄ —> Li₂SO₄ + 2H₂O

From the balanced equation above, 2 moles of LiOH reacted with 1 mole of H₂SO₄. Therefore,

0.010032 mole of LiOH will react with =  = 0.005016 mole of H₂SO₄.

Finally, we shall determine the molaity of the H₂SO₄ solution.

Mole of H₂SO₄ = 0.005016 mole

Volume = 25 mL = 25 / 1000 = 0.025 L

Molarity of H₂SO₄ =?

Molarity = mole / Volume, Molarity of H₂SO₄ = 0.005016 / 0.025, Molarity of H₂SO₄ = 0.20 M

Percent concentration: This refers to how much solute dissolves in 100 g of solvent. If a solution's concentration is 20%, we know that there are 20 g of solute in every 100 g of solution. As an illustration, a solution is made by mixing 10 g of salt and 70 g of water. Concentration makes it less likely that you will overlook crucial facts. You can memorize information more quickly if you maintain your focus. Medical, cognitive, or psychological issues, sleep disorders, prescription side effects, alcoholism, or drug usage are all possible causes of concentration issues. Anxiety, sadness, bipolar illness, emotional trauma, and stress are among the psychological disorders that can make it difficult to concentrate.

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