Why is dichloromethane (dcm) a good organic solvent to solubilize benzoic acid and acetanilide?

Answer:

0.313 M NaOH

Explanation:

Got it right on the test.

Taking into account the definition of molarity, the molarity of the solution is 0.313 M.

Molar concentration or molarity is a measure of the concentration of a solute in a solution and indicates the number of moles of solute that are dissolved in a given volume.

The molarity of a solution is calculated by dividing the moles of solute by the volume of the solution:

\(molarity=\frac{number of moles}{volume}\)

Molarity is expressed in units \(\frac{moles}{liter}\).

In this case, you know:

Replacing in the definition of molarity:

\(molarity=\frac{0.75 moles}{2.40 L}\)

Solving:

molarity= 0.313 M

Finally, the molarity of the solution is 0.313 M.

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In this experiment, the two reactants melted when mixed together in a test tube due to a chemical reaction that occurred between them. When two substances react chemically, they can form new substances with different physical properties, such as melting point.

In this case, the reaction between the two reactants resulted in the formation of a new substance with a lower melting point, causing it to melt when mixed together in the test tube. It is important to note that the specific reactants and the exact chemical reaction that occurred would need to be known in order to provide a more detailed explanation. When two reactants are mixed together in a test tube, they may undergo a chemical reaction that produces heat. This heat is often enough to cause the reactants to melt.

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The correct options are:1.

Conditional probability that the selected compound actually has an impurity is 0.74.2.

Conditional probability that the selected compound is actually free of an impurity is 0.0185.3.

Conditional probability that the selected roll is from Process I given that it is defective is 0.64.

Here, we need to find out the probability that a selected compound has an impurity given that the test indicates an impurity is present.

P(A) = probability that a compound has impurity = 0.15

P(B) = probability that the test indicates an impurity is present

= 0.15 x 0.9 + 0.85 x 0.05

= 0.14 + 0.0425

= 0.1825P

(B|A) = probability that the test indicates an impurity is present given that the compound has impurity = 0.9

Therefore, by Bayes' Theorem,

P(A|B) = P(B|A) * P(A) / P(B)

         = 0.9 * 0.15 / 0.1825

         = 0.7370

         ≈ 0.74

Conditional probability that the selected compound actually has an impurity is 0.74.10.

Here, we need to find out the probability that a selected compound is actually free of an impurity given that the test indicates an impurity is not present.

P(A) = probability that a compound has impurity = 0.15

P(B) = probability that the test indicates an impurity is not present = 0.85 x 0.95 + 0.15 x 0.1 = 0.8075

P(B|A) = probability that the test indicates an impurity is not present given that the compound has impurity

          = 0.1

Therefore, by Bayes' Theorem,

P(A|B) = P(B|A) * P(A) / P(B)

          = 0.1 * 0.15 / 0.8075

          = 0.0185

Conditional probability that the selected compound is actually free of an impurity is 0.0185.11.

Here, we need to find out the probability that the selected roll is from Process I given that it is defective.

Let A denote the event that a roll is from Process I and B denote the event that a roll is defective.

Then, we need to find out P(A|B).

P(A) = probability that a roll is from Process I = 0.6

P(B|A) = probability that a roll is defective given that it is from Process I = 0.03

P(B|A') = probability that a roll is defective given that it is from Process II = 0.01

P(A'|B) = probability that a roll is from Process II given that it is defective

Therefore, by Bayes' Theorem,

P(A|B) = P(B|A) * P(A) / [P(B|A) * P(A) + P(B|A') * P(A')]

= 0.03 * 0.6 / (0.03 * 0.6 + 0.01 * 0.4)

= 0.6429

≈ 0.64

Conditional probability that the selected roll is from Process I given that it is defective is 0.64.

Hence, the correct options are:1.

Conditional probability that the selected compound actually has an impurity is 0.74.2.

Conditional probability that the selected compound is actually free of an impurity is 0.0185.3.

Conditional probability that the selected roll is from Process I given that it is defective is 0.64.

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Answer:

C:Radiation

Explanation:

Pluto

Answer:

i hope this help

Explanation:

Radiation is a method of heat transfer that does not rely upon any contact between the heat source and the heated object as is the case with conduction and convection. Heat can be transmitted through empty space by thermal radiation often called infrared radiation. This is a type electromagnetic radiation.

Answer:

Solar energy. Biofuel, Nuclear power, Hydro power, Geothermal energy, Fossil, Gasoline, sun

The volume occupied by 0.102 mole of the helium gas is 2.69 L

The following data were obtained from the question:

The volume of the gas can be obtained by using the ideal gas equation as illustrated below:

PV = nRT

Divide both sides by P

V = nRT / P

V = (0.102 × 0.0821 × 305) / 0.95

V = 2.69 L

Thus, the volume of the gas is 2.69 L

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The Sun is the major source of energy for organisms and the ecosystems of which they are a part. Producers such as plants, algae, and cyanobacteria use the energy from sunlight to make organic matter from carbon dioxide and water. This establishes the beginning of energy flow through almost all food webs.

The correct name for the compound \(FeSO_{4}-6H_{2}O\) is Iron II Sulfate hexahydrate. This is because the compound contains iron in its +2 oxidation state (hence the "II" in the name), and the sulfate ion (\(SO_{4}\)) has a -2 charge.

The "hexahydrate" part of the name indicates that there are six water molecules associated with each formula unit of the compound.

Therefore, the correct name for this compound is Iron II Sulfate hexahydrate, and this name accurately reflects its chemical composition.

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Answer:

TE from the candle is carried by particles as they flow though the rod to the wax.

Explanation:

We require the equation to understand the process that occurs when X reacts with Y to form an ionic compound.The chemical equation for the formation of the ionic compound between X and Y would be: X + Y → XYwhere X represents the alkali metal in group I and Y represents a non-metal that is most likely in group VII. This equation represents the process of how the two elements react with each other to create an ionic compound.

Element X is found in group I of the periodic table, which means it belongs to the alkali metal group. Alkali metals are well-known for their reactivity, with the exception of lithium, which is the least reactive alkali metal. Alkali metals react with other elements to form ionic compounds. Let’s take a closer look at this process.Element X reacts with Element Y to create an ionic compound, which means that Element X becomes an ion in the process. Since Element X is an alkali metal, it has only one valence electron.

To form a positive ion, it loses this valence electron.Element Y, on the other hand, is probably a non-metal since it’s reacting with an alkali metal. Non-metals, unlike alkali metals, have a high electronegativity. As a result, they have a tendency to take electrons from other elements in order to complete their valence shells.

As a result, Element Y gains an electron in this instance.Since X loses its valence electron and Y gains an electron, X becomes a positive ion and Y becomes a negative ion. The resulting ionic compound is formed by the attractive forces between the positive and negative ions. The formula of the ionic compound is determined by the ratio of the ions present.

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Answer:

69.2 °C

Explanation:

To find the final temperature, you need to use the following equation:

Q = mcΔT

In this equation,

------> Q = heat (J)

------> m = mass (g)

------> c = specific heat capacity (J/g°C)

------> ΔT = T₂ - T₁ = change in temperature (°C)

To clarify, "T₁" represents the initial temperature and "T₂" represents the final temperature. You can plug the given values into the equation and simplify to find "T₂".

Q = 226 J                      c = 0.030 J/g°C

m = 192.4 g                   ΔT = T₂ - T₁ = T₂ - 30°C

Q = mcΔT                                                       <----- Given equation

Q = mc(T₂ - T₁)                                                <----- Rewrite ΔT

226 J = (192.4 g)(0.030 J/g°C)(T₂ - 30°C)     <----- Insert variables

226 J = 5.772(T₂ - 30°C)                                <----- Multiply 192.4 and 0.030

39.154 = T₂ - 30°C                                          <----- Divide both sides by 5.772

69.2 = T₂                                                        <----- Add 30 to both sides

Answer: Kc, is 1.845 at a given tempera

Explanation:

They were electrons in an atom's greatest primary energy level, which is occupied. In chemical bonds, they take part.

Atoms in molecules are held together by chemical bonds. Electrostatic forces between negatively charged electrons and positively charged atomic nuclei, whose locations in space are governed by quantum mechanics, give rise to bonds.

One of the most fundamental principles of chemistry, chemical bonding helps to explain other ideas like molecules and reactions. Without it, scientists would be unable to explain why atoms are drawn to one another or how products are created during a chemical process.

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Explanation:

No of mass = no of moles × molar mass

=2.55 × 18 g

= 45.9 g

Answer:

d

Explanation:

i think

When determining the standard reduction potential of a substance by using a standard hydrogen electrode as a reference, the standard reduction potential will always be equal to overall cell potential.

The overall cell potential is the reduction potential of the substance being determined using the standard hydrogen electrode as a reference electrode since its electrode potential is set at zero volts.

What do you mean by overall cell potential?
The driving force of the electron flow from anode to cathode shows a potential drop in the energy of the electrons moving into the wire. The difference in potential energy between the anode and cathode is known as the cell potential in a voltaic cell.

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The standard reduction potential will always be equal to overall cell potential.

What is potential?

Potential is the capacity to become or develop into something in the future. It is the latent ability or capacity to achieve something great, or to realize a desirable outcome. Potential is the ability to produce a result, or to manifest something of value. It is associated with the idea of potentiality, which is the capacity to achieve something or to be something. Potential can refer to a wide range of situations, from physical and mental abilities to creative and professional potential. Potential is a concept that is often used to motivate people and challenge them to reach their highest level of performance. It can also be used to describe the potential of a given situation or environment, such as the potential of a business opportunity or a promising career path. Potential is an essential factor in personal development and growth, and it can be developed and nurtured over time.

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The weight/volume percent of sugar in the soda is approximately 10606.06%.

To calculate the weight/volume percent (w/v%) of sugar in soda, we need to divide the mass of sugar by the volume of soda and multiply by 100.

w/v% = (mass of sugar / volume of soda) * 100

Given:

Mass of sugar = 35.0 g

Volume of soda = 330.0 mL

First, we need to convert the volume from milliliters to liters:

Volume of soda = 330.0 mL = 0.330 L

Now we can calculate the w/v%:

w/v% = (35.0 g / 0.330 L) * 100 = 10606.06 %

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For the following aqueous equilibria;

a. NH₃(aq) + H₂O(l) ⇌ NH₄⁺(aq) + OH⁻(aq)

The Brønsted-Lowry conjugate acid-base pairs in this equilibrium are:

NH₃ (conjugate base) and NH₄⁺ (conjugate acid)

H₂O (conjugate acid) and OH⁻ (conjugate base)

To determine the weaker side, compare the strengths of the conjugate acid-base pairs. In this case, NH₃ is a weaker base than H₂O, and NH4+ is a stronger acid than OH-. Therefore, the weaker side is the left side of the equation: NH₃(aq) + H₂O(l).

b. HCN(aq) + H₂O(l) ⇌ H₃O⁺(aq) + CN⁻(aq)

The Brønsted-Lowry conjugate acid-base pairs in this equilibrium are:

HCN (conjugate base) and H₃O⁺ (conjugate acid)

H₂O (conjugate acid) and CN⁻ (conjugate base)

To determine the weaker side, compare the strengths of the conjugate acid-base pairs. In this case, HCN is a weaker base than H₂O, and H₃O⁺ is a stronger acid than CN-. Therefore, the weaker side is the left side of the equation: HCN(aq) + H₂O(l).

c. NH₄⁺(aq) + CO₃²⁻(aq) ⇌ NH₃(aq) + HCO₃⁻(aq)

The Brønsted-Lowry conjugate acid-base pairs in this equilibrium are:

NH₄⁺ (conjugate acid) and NH₃ (conjugate base)

CO₃²⁻ (conjugate base) and HCO₃⁻ (conjugate acid)

To determine the weaker side, compare the strengths of the conjugate acid-base pairs. In this case, NH₃ is a weaker base than NH₄⁺, and HCO₃⁻ is a stronger acid than CO₃²⁻. Therefore, the weaker side is the right side of the equation: NH₃(aq) + HCO₃⁻(aq).

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Hydrogen bonds do not form between two hydrogen atoms. where do hydrogen bonds form?

hydrogen bonds act between adjacent molecules and between atoms of the same molecule. hydrogen bonds form between a slight positive change on the hydrogen atom of a polar covalent bond.

What is molecules?

According to the context, the term may or may not include ions that meet this requirement. A molecule is a collection of two or more atoms held together by the attractive forces known as chemical bonds.

Therefore,

Hydrogen bonds do not form between two hydrogen atoms. where do hydrogen bonds form?

hydrogen bonds act between adjacent molecules and between atoms of the same molecule. hydrogen bonds form between a slight positive change on the hydrogen atom of a polar covalent bond and a slight negative charge on an oxygen atom of another polar covalent bond.

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The product that was analyzed using GC has a retention time of 4.39 min.

Based on the given information, the product has a retention time of 4.39 min, and its peak area is \(2.93\ cm^{2}\). The starting alcohol has a retention time of 9.48 min, and its peak area is \(0.48\ cm^{2}\). It can be inferred that the product has a higher peak area than the starting alcohol, indicating that the reaction has proceeded to a significant extent. The retention time of the product falls between the retention times of dichloromethane and cyclohexene standards, which suggests that the product may contain both of these compounds or could be structurally similar to them. Further analysis, such as mass spectrometry or infrared spectroscopy, could be conducted to identify the exact composition of the product.

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A) The partial pressure of oxygen at the mountain top is 0.105 bar.

B) The balloon's volume at the mountain top is 2 I.

C) The partial pressure of nitrogen on Mars is 0.4 bar.

A) The partial pressure of a gas is calculated by multiplying the total pressure by the fraction of the gas in the mixture. In this case, the partial pressure of oxygen at the top of the mountain would be 0.5 bar multiplied by the concentration of oxygen at sea level, which is 0.21, resulting in 0.105 bar.

B) Boyle's law states that the volume of a gas is inversely proportional to its pressure at a constant temperature. Therefore, if the pressure decreases from 1 bar to 0.5 bar, the volume of the balloon would double, so its volume at the top of the mountain would be 2 I.

C) In a mixture of nitrogen and carbon dioxide with equal proportions (50:50) and a total atmospheric pressure of 0.8 bar, each gas contributes equally. Therefore, the partial pressure of nitrogen would be half of the total pressure, resulting in 0.4 bar.

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Iron ore, coke and limestone are three important raw materials for the production of iron. Iron ore is used for the production of iron, while coke is used for heating the iron ore and limestone is added as a flux to remove impurities from the iron during the smelting process.

Iron ore: Iron ore is a mineral that is mined and extracted from the ground. Iron is the most important raw material used in steel production. Iron ore is used to make steel. Iron ore is used to make iron and steel. Iron ore is melted down with coke, which is a carbon-rich fuel, in a blast furnace to create pig iron. The pig iron is then converted into steel in a steelmaking plant.Coke: Coke is a fuel made from coal that has been heated in the absence of air. Coke is used to heat the iron ore and create the high temperatures needed for the smelting process. Coke is an important raw material for the production of steel.

Coke is also used to produce other materials, such as chemicals and fertilizer.Limestone: Limestone is a sedimentary rock composed primarily of calcium carbonate. Limestone is used as a flux in the steelmaking process. The purpose of adding limestone to the blast furnace is to remove impurities from the iron, such as sulfur and phosphorus.

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Answer:

trait is a characteristic of an organism

The correct choice is A) −5Δ[Br−]/Δt. The rate expressed as Δ[Br2]/Δt is proportional to -5 times the rate of change of Br−.

In the given reaction 5Br−(aq) + BrO3−(aq) + 6H+(aq) → 3Br2(aq) + 3H2O(aq), the stoichiometric coefficients provide information about the relationship between the reactants and products. To determine the rate expressed as Δ[Br2]/Δt, we need to compare it with the rate of change of the other species.

Based on the balanced equation, for every 5 moles of Br− consumed, 3 moles of Br2 are produced. Therefore, the rate of change of Br−, Δ[Br−]/Δt, is related to the rate of change of Br2, Δ[Br2]/Δt, by a factor of -5/3.

The other choices, B) −0.6Δ[Br−]/Δt, C) 3Δ[BrO3−]/Δt, and D) −Δ[H2O]/Δt, do not correspond to the correct relationship based on the stoichiometric coefficients of the reaction. Therefore, the correct answer is A) −5Δ[Br−]/Δt.

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The rate of formation of I2 (iodine) in M/s, can be calculated by using the stoichiometry of the balanced chemical equation:

IO3- (iodate) + 7 I- (iodide) + 6 H+ (proton) --> 3 I2 + 3 H2O (water)

The rate of consumption of I- (iodide) is given as 0.14 M/s. We can now find the rate of formation of I2 using the stoichiometric coefficients:

Rate of formation of I2 = (Rate of consumption of I-) × (Coefficient of I2 / Coefficient of I-)
Rate of formation of I2 = (0.14 M/s) × (3/7)

Calculating the rate of formation of I2:

Rate of formation of I2 = 0.14 × (3/7) = 0.06 M/s

So the correct answer is D. 0.06 M/s.

Therefore the rate of formation of I2 (iodine) in M/s is 0.06 M/s.

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The statement about the inequality that is NOT true is (A), a and b may be equal to each other.

This is because the inequality y> x-4 means that y must be greater than x-4. If a and b are equal, then y = x-4, which means that the inequality is not satisfied.

The other three statements are true because:

If 4 is subtracted from a, it will be greater than b because y> x-4 means that y must be greater than x.

If 4 is subtracted from b, it will be less than a because y> x-4 means that y must be greater than x.

If 4 is subtracted from both a and b, the inequality will still be true because y> x-4 means that y must be greater than x, even if x and b are both decreased by 4.

Therefore, the answer to the question is the statement a and b may be equal to each other.

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Complete question:

Guided Learning ar Inequalities in One Variable - Item 7601

Pre-Quiz

Practice

from a, it will be greater than b.

Post-Quiz

Finish

If the ordered pair (a, b) satisfies the inequality y> x-4, three of these statements are true. Which statement is NOT true?

a and b may be equal to each other.

If you subtract 4 from a, it will be greater than b.

If you subtract 4 from b, it will be less than a.

If you subtract 4 from both a and b, the inequality will still be true.

Catabolism refers to a process that is associated with energy release in which complex compounds are broken down into simpler molecules.

Catabolism is a metabolic process that involves the breakdown of complex molecules into simpler molecules, typically accompanied by the release of energy. It is the opposite of anabolism, which is the process of building complex molecules from simpler ones.

During catabolism, large molecules such as carbohydrates, proteins, and fats are broken down into smaller units such as glucose, amino acids, and fatty acids, respectively. These smaller molecules can then be further processed and utilized by cells to generate energy or to synthesize other necessary molecules.

The breakdown of complex molecules in catabolism occurs through various biochemical reactions such as hydrolysis, oxidation, and enzymatic degradation. These reactions release energy stored within the chemical bonds of the complex molecules, which can be captured and used by cells for various cellular processes, including muscle contraction, active transport, and synthesis of new molecules.

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Answer:

C

Explanation:

The ratio of 32 to 16 is:

Hence, 2:1 will be the ratio.

Hoped this helped.

\(BrainiacUser1357\)

Approximately 0.033482 moles of gas were present during the process of the temperature change.

To find the number of moles of gas present during the process, we can use the ideal gas law:

PV = nRT

where: P is the pressure (1.804E+5 Pa),

V is the volume (0.00476 m³),

n is the number of moles,

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

T is the temperature change in Kelvin.

First, we need to convert the temperature change from Celsius to Kelvin:

ΔT = 26.5 °C = 26.5 K

Rearranging the ideal gas law equation to solve for the number of moles:

n = PV / (RT)

Substituting the given values into the equation:

n = (1.804E+5 Pa × 0.00476 m³) / (8.314 J/(mol·K) × 26.5 K)

Simplifying the equation and performing the calculations:

n ≈ 0.0335 mol

Therefore, approximately 0.0335 moles of gas were present during the process.

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