A 36.4 mL sample of an unknown liquid has a mass of 32.65 g. The sample is added to a volume of water at room temperature, but the water and the unknown liquid do not mix. What will be observed

Answer:

A molecule's shape strongly affects its physical properties and the way it interacts with other molecules, and plays an important role in the way that biological molecules (proteins, enzymes, DNA, etc.) interact with each other.

Explanation:

There are two types of chemical compound one is covalent compound and other is ionic compound, covalent compound formed by sharing of electron and ionic compound formed by complete transfer of electron. Therefore, by rotation of molecule or bond , we can change the shape of molecule.

Chemical Compound is a combination of molecule, Molecule forms by combination of element and element forms by combination of atoms in fixed proportion.

An ionic compound is a metal and nonmetal combined compound. Ionic compound are very hard. They have high melting and boiling point because of strong ion bond.

The compound that is ionic in nature can be dissociated very easily in water. Since ionic compounds are polar in nature, they readily dissolve in water. To change the shape of your molecular models without breaking any of the covalent bonds is by rotating the molecule or a bond.

Therefore, by rotation of molecule or bond , we can change the shape of molecule.

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The method I described in part b, which involves determining the number of recessive alleles in a self-isolated population, is not applicable to separating a mixture of two amines.

This method is specific to analyzing genetic data and population genetics, and it cannot be directly used for chemical separations. Separating a mixture of two amines requires a different approach, typically involving chemical or physical methods based on the properties of the amines. Some common separation techniques used for amines include distillation, extraction, chromatography, and crystallization.

Distillation is useful when the amines have different boiling points. By heating the mixture, the amine with the lower boiling point will vaporize first and can be collected separately. Extraction involves using a solvent that selectively dissolves one amine over the other, allowing for separation. Chromatography techniques, such as gas chromatography or liquid chromatography, can also be employed based on differences in affinity or partitioning of the amines. Crystallization exploits differences in solubility, allowing one amine to crystallize out of the solution.

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Answer:

This question lacks options; the options are:

A) They moved more freely

B) They moved closer together.

C) The average speed increased.

D) The average kinetic energy increased

The answer is B

Explanation:

The water in the beaker is described to be in a liquid state of matter. Its temperature decreases from 50°C to 10°C when placed in a freezer by Kiley. This means that heat is gradually being lost as the liquid water undergoes freezing into a solid state.

When water in a liquid state is freezed, it's molecules, which were moving more freely begin to move closer together because the speed at which the particles in the liquid state moved has been reduced.

⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻

[B] Calorific Value

⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻

Explanation:

The correct answer is [B] Calorific value

Calorific Value ⇒  Amount of energy (heat) produced on burning 1 kg of a fuel completely in air. Which expressed in a unit called kilojoule per kilogram. (kj/kg)

Hence, [B] Calorific value is the answer.

~Lenvy~

Answer:

B. calorific value

Explanation:

Fuel efficiency is measured in terms of calorific value, which is measured in kilojoules per kilogramme. It is the amount of heat produced by the complete combustion of one kilogramme of fuel.

I am joyous to assist you at any time.

If two independent estimates of σ2 (variance) are close together, it suggests that the variability of sample means can be attributed to the true underlying population variance.

When conducting statistical analysis, researchers often estimate the population variance, σ2, using different samples. If the resulting estimates are relatively similar, it indicates that the observed variability in the is likely due to the true variability in the population. This implies that the samples are representative and that the estimated variance accurately captures the true variance. Conversely, if the estimates differ significantly, it suggests that other factors may be influencing the variability of the sample means, such as sampling bias or random fluctuations.

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Answer:

1.23x10^24 atoms/6.022x10^23 atom/mol = 2.04 mol H20

Explanation:

β-carbonyl carboxylic acids are carboxylic acids that contain a carbonyl group (C=O) attached to the β-carbon atom, which is the carbon atom adjacent to the carboxyl group (-COOH).

Other carboxylic acid derivatives include esters, amides, and anhydrides. Esters are formed by the reaction of a carboxylic acid with an alcohol, while amides are formed by the reaction of a carboxylic acid with an amine. Anhydrides are formed by the dehydration reaction of two carboxylic acid molecules.

To classify a compound as a β-carbonyl carboxylic acid or another carboxylic acid derivative, you would need to examine its chemical structure and identify the presence of a β-carbonyl group or other functional groups characteristic of esters, amides, or anhydrides.

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Answer:

The velocity of the bb when it reaches a height of 203 m can be determined using the laws of projectile motion. Since the bb is moving vertically upwards, its velocity at that height will be zero.

brainlest?

Answer: v = 83.96 m/s

Assuming the acceleration due to gravity is approximately 9.8 m/s^2, we can use the principles of projectile motion and energy conservation.

Using the equation for the vertical displacement of an object in free fall:

Δy = (v₀² - v²) / (2g)

Δy = vertical displacement (203m)

v₀ = initial velocity (105 m/s)

v = final velocity (not known yet)

g = accerlation due to gravity (9.8 m/s^2)

Lets rearrange the equation to solve for the final velocity:

v = v = √(v₀² - 2gΔy)

Substituting the given values:

v = √(105² - 2 * 9.8 * 203)

v ≈ √(11025 - 3979.6)

v ≈ √(7054.4)

v ≈ 83.96 m/s

Therefore, when the BB pellet is at the height of 203m, its velocity will be approximately 83.96 m/s.

Answer:

1.KCl is answer

Explanation:

when potassium chloride KCl is dissolved in water,it will dissociate to form k+ and cl- .thus,the solute must be k+Cl- .

I hope it's helpful!

The substance dissolved in a solvent or water is called a solute it makes up the homogenous mixture called solution by getting dissolved in it.

The \(\rm KCl\) is the solute in the aqueous solution of \(\rm KCl\).

Therefore, option A, \(\rm KCl\) is the solute.

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Galaxies are the lump of matter. The shape of major galaxies is spiral shape. Thus, the given statement is false.

The galaxies are the lump of dust and mass, held together by the gravitational force. The galaxies are continuously moving in the universe.

The formation of galaxies is believed to be due to the force of attraction between the components.

The shape of major galaxies is assumed to be spiral-shaped, however, the irregular shape galaxies are also present.

Thus, the given statement about the shape of galaxies is false.

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Considering that copper occupies Group 11, the ionic compound with a transition metal in it is c. CuSO₄.

A transition metal is any of the set of metallic elements occupying a central block (Groups 3–12) in the periodic table. The differential electron occupies a d subshell.

Which of the following ionic compounds has a transition metal in it?

The ionic compound with a transition metal in it is c. CuSO₄.

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Answer:

decompression melting

Explanation:

if not then flux melting

The balanced chemical equation between strong base and weak acid is represented as follows:

NaOH(aq)+ CH3COOH(aq)-----> CH3COONa(aq) + H2O(l)

When an acid reacts with a base, a salt is formed along with the formation of water, and this reaction is termed as neutralization reaction.

When a weak acid and a strong base are mixed, they react according to the following net-ionic equation: HA(aq) + OH⁻(aq) → A⁻(aq) + H₂O(l).

The balanced chemical equation between strong base and weak acid is represented as follows:

NaOH(aq)+ CH3COOH(aq)-----> CH3COONa(aq) + H2O(l)

Here, sodium hydroxide (NaOH) is a strong base and acetic acid (CH3COOH) is a weak acid.

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True. Maltose is a disaccharide formed by the alpha-1,4 glycosidic linkage of two glucose molecules. Maltose is a reducing sugar. Thus, its two glucose molecules must be linked in such a way as to leave one anomeric carbon that can open to form an aldehyde group.

The glucose units in maltose are joined in a head-to-tail fashion through an α-linkage from the first carbon atom of one glucose molecule to the fourth carbon atom of the second glucose molecule (that is, an α-1,4-glycosidic linkage; see Figure 14.6.1 The bond from the anomeric carbon of the first monosaccharide unit is directed downward, which is why this is known as an α-glycosidic linkage. The OH group on the anomeric carbon of the second glucose can be in either the α or the β position, as shown in Figure 14.6.1.

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The melting point of 9,10-dihydroanthracene-9,10-succinic acid anhydride is 179-181°C.

A 9,10-Dihydroanthracene-9,10-succinic acid anhydride is a reagent used in the synthesis of polycyclic aromatic hydrocarbons (PAHs). It is used to oxidize a variety of ketones and aldehydes to the corresponding carboxylic acids or esters, as well as to reduce other compounds. The crystal structure of this reagent has been studied using single-crystal X-ray diffraction at 300 K by Hu and coworkers.

The temperature at which a substance melts is known as its melting point. In general, substances that are purer have higher melting points than those that are less pure. Melting point determination can be used to help identify and/or characterize a substance by comparing its melting point to a known standard value. Additionally, it can be used to determine the purity of a substance.

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Answer:

the equator

Explanation:

longitude and latitude is used to find where you are on a map

Answer: 32 atomic mass units

Explanation:

carbon is 14

hydrogen is 1 each

oxygen is 16

In this case, if you put the plate in a developing chamber that has 1.2 cm of developing solvent and your sample spots are 1 cm above the bottom of the tlc plate, then the spots may be washed off the plate, which would lead to the loss of the sample.

A thin-layer chromatography (TLC) is a technique used for separating non-volatile mixtures. A TLC plate is made up of a plastic sheet or a glass plate that has an adsorbent material such as silica or alumina. The adsorbent material is a polar substance, and hence it interacts with polar molecules of the compounds present in the mixture.The sample is placed at the bottom of the plate, and the plate is put into a developing chamber containing a solvent.

The solvent travels up the plate, and the mixture is separated into its components due to the difference in their interaction with the adsorbent material.The separation of the mixture components depends on several factors, including the nature of the adsorbent material, the type of solvent used, the polarity of the mixture components, and the distance of the sample spot from the bottom of the plate.

If the distance between the sample spot and the bottom of the plate is less than the depth of the solvent layer, the sample may be washed off the plate, leading to the loss of the sample..

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In this chemical reaction, aluminum hydroxide is the base and nitric acid is the acid.

What is chemical reaction?

The reactants in this equation are not given, so it is not possible to predict the parent acid and base with certainty. However, based on the products, we can make some educated guesses.

\(Al(NO_{3})_{3}\) is an ionic compound composed of aluminum ions (\(Al_{3}^{+}\)) and nitrate ions (\(NO_{3}^{-}\)). When this compound is dissolved in water, it dissociates into its constituent ions. The presence of  \(3H_{2}O\) molecules on the product side of the equation suggests that the reaction involves a hydrated metal ion.

One possible reactant that could produce these products is aluminum hydroxide (\(Al(OH)_{3}\)), which is a common base. When \(Al(OH)_{3}\)  reacts with nitric acid (HNO3), it forms aluminum nitrate (\(Al(NO_{3})_{3}\)) and water (\(H_{2}O\)) as products.

The balanced chemical equation for this reaction would be:

\(Al(OH)_{3}\) + \(3HNO_{3}\) → \(Al(NO_{3})_{3}\) + \(3H_{2}O\)

In this equation, aluminum hydroxide is the base and nitric acid is the acid.

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Complete question is: Based on the following products, the parent acid and base are nitric acid and aluminum hydroxide.

If half life of an isotope is 12 days, then there are about 820.42 transformations in the stomach after the person ate 400 Bq of the isotope.

Using the GI track model information, the number of transformations in Stomach can be calculated as follows :

We know that the half-life of an isotope is defined as the time taken for half of the radioactive atoms to decay.

The decay of the isotope can be represented by the following formula : N(t) = N0e^(-λt)

where:

N(t) = Number of atoms at time t

N0 = Initial number of atoms

λ = Decay constant

t = Time elapsed from the initial time t = 0

For a given isotope, the decay constant is related to the half-life as follows : λ = 0.693/T1/2

where : T1/2 = Half-life time of the isotope

Given that the half-life of the isotope is 12 days, we can calculate the decay constant as follows :

λ = 0.693/12 = 0.0577 day^(-1)

The number of transformations in the stomach can be calculated by using the following formula :

Activity = A0e^(-λt)

where : A0 = Initial activity of the isotope in Bq

λ = Decay constant

t = Time elapsed from the initial time t = 0

Activity = 400 Bq (Given)

Decay constant (λ) = 0.0577 day^(-1)

Time elapsed (t) = Time taken by the isotope to reach the stomach from the time of consumption = 0.17 days (Given by GI track model)

Therefore, the number of transformations in the stomach is :

Activity = A0e^(-λt)A0 = Activity/e^(-λt)A0 = 400 Bq/e^(-0.0577 × 0.17)A0 = 400 Bq/e^(-0.009809)A0 = 447.45 Bq

The number of transformations in the stomach can be calculated as follows :

Number of transformations = Activity decayed per unit time/Disintegration constant

Activity decayed per unit time = A0 - Activity after time elapsed

Activity decayed per unit time = 447.45 - 400 = 47.45 Bq

Disintegration constant = Decay constant = 0.0577 day^(-1)

Therefore, number of transformations = (447.45 - 400) Bq/0.0577 day^(-1)

Number of transformations = 820.42

This means that there are about 820.42 transformations in the stomach after the person ate 400 Bq of the isotope.

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Answer:

The potential of the Standard Hydrogen Electrode (S.H.E.) under the given conditions would be approximately 0.070 volts.

Explanation:

To determine the potential of a Standard Hydrogen Electrode (S.H.E.), we need to consider the Nernst equation, which relates the electrode potential to the concentrations of the species involved. The Nernst equation is given as:

E = E° - (RT/nF) * ln(Q)

Where:

E is the electrode potential

E° is the standard electrode potential

R is the ideal gas constant (8.314 J/(mol·K))

T is the temperature in Kelvin

n is the number of electrons transferred in the balanced redox equation

F is the Faraday constant (96,485 C/mol)

Q is the reaction quotient (ratio of products to reactants)

In the case of the S.H.E., the standard electrode potential (E°) is defined as 0 volts.

Given that the hydrogen ion concentration ([H+]) is 0.21 M, the hydrogen gas pressure (pH2) is 3.2 atm, and the temperature (T) is 298 K, we can use these values to calculate the potential of the S.H.E.

First, we need to calculate the reaction quotient (Q). In the case of the S.H.E., the reaction is the reduction of protons (H+) to hydrogen gas (H2):

Q = [H+] / pH2

Substituting the given values:

Q = 0.21 M / (3.2 atm)

Now, we can substitute the values into the Nernst equation:

E = 0 V - (8.314 J/(mol·K) * 298 K / (2 * 96,485 C/mol) * ln(0.21 M / (3.2 atm))

Calculating this expression:

E ≈ 0 V - (0.0257 V) * ln(0.0656)

E ≈ 0 V - (0.0257 V) * (-2.7207)

E ≈ 0 V + 0.070 V

E ≈ 0.070 V

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Answer:

volume= 1.77dL

first you'll find the moles using

Moles= Mass/Molar mass

After that you'll find the volume using

Molarity= Moles/Volume

Answer:

a. Plum pudding model

Explanation:

The plum pudding model of the atom was proposed by J.J. Thomson. It was the model he derived from his experiment on the gas discharge tube.

J.J Thomson was the first person to discover electrons which he called cathode rays because in the discharge tube, they emanate from the cathode.

In the long version of the Periodic table, the elements Lithium (Li), Sodium (Na), Potassium (K), Rubidium (Rb), Caesium (Cs), and Francium (Fr) collectively make up one group. Because their oxides and hydroxides are soluble in water and produce a potent alkaline (basic) solution, these metals are collectively referred to as alkali metals.

Alkali metals' distinctive flame colors—red, yellow, violet, crimson, and blue for Li, Na, K, Rb, and Cs, respectively—are qualitative markers of the contemporary analytical techniques used to calculate the quantities of alkali-metal salts in aqueous solution.

Most other metals are harder than alkali metals. The most reactive elements in this category are cesium and francium.

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Answer:

Element Z

Explanation:

I hope this is correct and helps you!

The theoretical yield of NaBr given that 2.36 moles of FeBr₃ reacts is 7.08 moles

2FeBr₃ + 3Na₂S → Fе₂S₃ + 6NaBr

From the balanced equation above,

2 moles FeBr₃ reacted to produce 6 moles of NaBr

From the balanced equation above,

2 moles FeBr₃ reacted to produce 6 moles of NaBr

Therefore,

2.36 moles FeBr₃ will react to produce = (2.36 × 6) / 2 = 7.08 moles of NaBr

Therefore,

Thus, the theoretical yield of NaBr is 7.08 moles

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Answer:

7.08

Explanation:

The net charge of the ion that consists of 7 protons, 9 neutrons, and 10 electrons will be -3.

HOW TO CALCULATE NET CHARGE:

net charge = no. of protons - no. of electrons

net charge: 7 - 10

net charge = -3

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Answer:

1. False

2. True

3. True

4. True

5. False

Explanation:

Answer:

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Explanation: