Using the collision theory, explain why collisions between two reacting particles do not always result in the formation of a product

Answers

Answer 1

According to the collision theory, chemical reactions occur when reacting particles collide with sufficient energy and proper orientation.

Still, not all collisions between two replying  patches affect in the  conformation of a product. This is because not all collisions  retain the necessary characteristics for a successful  response.   For a  response to  do, the colliding  patches must have enough kinetic energy to overcome the activation energy  hedge. The activation energy is the  minimal energy  needed for a  response to takeplace.

However, the replying  patches will bounce off each other without  witnessing any chemical  response, If the collision has  inadequate energy.   likewise, the  exposure of the colliding  patches must be applicable. The replying  patches must collide in such a way that the replying species have a chance to reply with oneanother.However, they won't reply, indeed if they  retain enough energy, If the  patches don't collide in the correct  exposure.

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Related Questions

SOMEONE PLEASE I NEED HELP WITH CHEMISTRY !! ITS URGENT

Draw a diagram for Copper(ll) nitrate & Cu(NO3)2 in a 250.0 mL of aqueous solution to show how to make the solution. Information to include…

Molarity of solution - 0.1176
She then draws 30.0 mL of the solution into a pipet. (MOLES OF CU(NO3)2 - 0.00352)

THEN : Mrs. Mandochino empties the 30.0 mL into an empty volumetric flask and fills it to the 240.0 mL mark with distilled water.
What is the molarity of this new solution?

Make sure to have 5 ACCURATE steps drawn. Your drawing should only be 1 picture but include 5 steps.

Answers

The concentration of the diluted solution as a result is 0.0146 M .

What is dilution?

When we add the 30mL solution to another container and then dilute the container to about 240 mL it can be said that we have diluted the solution and the solution that we have at that point is the dilute solution of the substance.

The dilution formula will be used to arrive at that;

C1V1 = C2V2

We would therefore have that;

0.1176 * 30 = x * 240

where the new concentration following dilution is x.

x = 0.0146 M

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kmno4 is a strong oxidizer. when it oxidizes br- , what new form of bromine is formed? would this form of bromine, or the original br- , be more soluble in non-polar mineral oil?

Answers

When potassium permanganate (KMnO4) oxidize bromide ions (Br-) in an aqueous solution, it produces a new form of bromine called bromine water (Br2(aq)). Bromine water is a pale yellow solution that contains diatomic bromine molecules (Br2). The reaction can be represented by the following chemical equation:

2KMnO4 + 6H2O + 10Br- → 2MnO2 + 2KOH + 3Br2 + 8H+

The reaction involves the transfer of electrons from bromide ions to the manganese atoms in KMnO4, causing the oxidation of Br- to Br2.

Now, coming to the second part of your question, non-polar mineral oil is not a suitable solvent for bromine water or bromide ions as they are both polar substances. However, if we consider the solubility of Br- and Br2 in non-polar solvents, Br2 would be more soluble in non-polar mineral oil due to its non-polar nature. Bromide ions, on the other hand, are polar and would not dissolve readily in non-polar solvents. In general, polar substances dissolve in polar solvents, while non-polar substances dissolve in non-polar solvents.

In conclusion, when KMnO4 oxidizes Br-, it produces bromine water (Br2(aq)). If we consider the solubility of Br2 and Br- in non-polar mineral oil, Br2 would be more soluble due to its non-polar nature.

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butadiene, c4h6, dimerizes (two molecules combine to form a single molecule) to form c8h12. the rate constant for the dimerization is 1.88 m-1 min-1 at 298 k of temperature. starting with an initial concentration of butadiene of 1.35, how many minutes will it take for the concentration of butadiene to be 0.39?

Answers

It will take 5.17 minutes for the concentration of butadiene to decrease from 1.35 M to 0.39 M.

To calculate the time it will take for the concentration of butadiene to decrease from 1.35 M to 0.39 M, we can use the first-order rate law equation;

Rate = k[A]

where Rate is the rate of reaction, k is the rate constant, and [A] is the concentration of butadiene.

Given; Initial concentration of butadiene ([A]0) = 1.35 M

Final concentration of butadiene ([A]t) = 0.39 M

Rate constant (k) = 1.88 M⁻¹ min⁻¹

We need to find time (t) in minutes.

Using the first-order rate law equation, we can rearrange the equation to solve for time (t);

Rate = k[A]

Rate = -d[A]/dt

k[A] = -d[A]/dt

dt = -1/k × d[A]/[A]

Now we can plug in the given values and solve for time (t);

dt = -1/k × d[A]/[A]

dt = -1/1.88 × d[A]/[A] (substituting k = 1.88 M⁻¹ min⁻¹

dt = -0.5319 × d[A]/[A] (calculating -1/1.88)

Integrating both sides of the equation with respect to time (t) from 0 to t for the concentration of butadiene from [A]0 to [A]t, we get:

∫(0 to t) dt = ∫(-0.5319 × d[A]/[A])

Solving the integral on the left-hand side, we get;

t = -0.5319 × ln([A]t/[A]0)

Plugging in the given values for [tex][A]_{0}[/tex] and [tex][A]_{t}[/tex], we can calculate the time (t);

t = -0.5319 × ln(0.39/1.35)

t ≈ 5.17 minutes

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A container of orange juice at 25°C has a hydronium concentration of 1.78 × 10^-3M. What is the pH of the juice?
A) 1.84
B) 3.31
C) 2.75
D) 11.25
E) 7.00

Answers

To find the pH of the orange juice with a hydronium concentration of [tex]1.78 * 10^{-3}[/tex] M at 25°C, follow these steps:

1. Recall the pH formula: [tex]pH = -log10[H+][/tex], where [H+] represents the hydronium concentration.
2. Substitute the given hydronium concentration into the formula: [tex]pH = -log10(1.78 × 10^{-3} )[/tex]
3. Calculate the pH using a calculator or logarithm table.

The calculated pH is approximately 2.75. Therefore, the correct answer is:
C) 2.75

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Determine the solubility for CuC2O4(s) in pure water. Ksp for is 2.9 × 10^-8.
A) 0.0036 g L-1
B) 0.069 g L-1
C) 0.026 g L-1
D) 0.18 g L-1
E) 0.0083 g L-1

Answers

To determine the solubility of CuC2O4(s) in pure water, we need to use the Ksp expression:

Ksp = [Cu2+][C2O4 2-]

Since CuC2O4(s) dissolves in water to form Cu2+ and C2O4 2-, we can assume that the solubility of CuC2O4(s) is "x" and the concentration of Cu2+ and C2O4 2- ions is also "x".

Therefore,

Ksp = x^2

2.9 × 10^-8 = x^2

x = sqrt(2.9 × 10^-8)

x = 0.00539

So, the solubility of CuC2O4(s) in pure water is 0.00539 moles/L.

To convert moles/L to grams/L, we need to multiply by the molar mass of CuC2O4:

63.55 + 2(12.01) + 4(16.00) = 197.56 g/mol

0.00539 mol/L x 197.56 g/mol = 1.065 g/L

Therefore, the answer is not one of the options given. However, we can round it to the nearest option, which is D) 0.18 g/L.


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What is the pH of a substance that has a hydrogen ion concentration of 1.2 x 10-2?M? O 0.080 1.00 O 1.92 2.08

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the pH of a substance that has a hydrogen ion concentration of 1.2 x 10⁻²M is 1.92.

How to calculate pH concentration?

The pH of a substance is a measure of its acidity or alkalinity and is calculated using the formula:

pH = -log10[H+]

where [H+] represents the hydrogen ion concentration in moles per liter (M).

In this case, the hydrogen ion concentration is 1.2 x 10⁻² M.

To find the pH, simply apply the formula:

pH = -log10(1.2 x 10⁻²)

After calculating, you will find that the pH is approximately 1.92.

This means that the substance is acidic, as a pH below 7 indicates acidity.

Among the given options (0.080, 1.00, 1.92, 2.08), the correct pH value for the substance with a hydrogen ion concentration of 1.2 x 10⁻² M is 1.92.

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g the oxygen atom of the carbonyl group bears a significant amount of a. partial positive charge. b. electron cloud. c. partial negative charge. d. electron density.

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The oxygen atom of the carbonyl group bears a significant amount of partial negative charge. This is because oxygen is more electronegative than the carbon it is bonded to, which causes it to attract the shared electrons more strongly, resulting in a partial negative charge on the oxygen atom and a partial positive charge on the carbon atom.

The oxygen atom of the carbonyl group bears a significant amount of c. partial negative charge, due to the electronegativity of the oxygen atom causing it to attract electrons more strongly than the carbon atom.

                 This results in an uneven distribution of electron density, with the oxygen atom having a greater share of the electrons and a partial negative charge, while the carbon atom has a partial positive charge.
                       

Therefore,  The oxygen atom of the carbonyl group bears a significant amount of c. partial negative charge.

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Derek sees an advertisement for new cleats. The advertisement says the cleats are "light, comfortable, long-lasting, deluxe, and a wise investment." Which sentence gives the point of view of the creator of the cleats? (1 point) O The more you spend on cleats, the better you will be at sports. O Any cleats will make you a good athlete. O Expensive cleats look better. O It is worth investing in quality cleats.​

Answers

Based on the information, we can infer that the point of view of the creator of the cleats is "It is worth investing in quality cleats" (option D):

How to identify the sentence that refers to the point of view of the advertiser?

To identify the sentence that refers to the point of view of the advertiser we must read the ad and the options. Once we have done this procedure we can establish what would be the statement that would express the opinion of the advertiser.

In this case, we can infer that the statement that expresses the advertiser's opinion is "It is worth investing in quality cleats" because it highlights that the value of this product is high, but likewise its quality is superior to that of other products from this type.

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An international association of artists from the mid-20th century living in Europe (specifically, in Copenhagen, Brussels, and Amsterdam), who aimed to promote organic experimentation and free expression of the unconscious, had a name it shared (coincidentally) with what specific type of venomous reptile?

Answers

The international association of artists you're referring to is known as CoBrA, which was active in the mid-20th century.

The group's name was derived from the first letters of the cities Copenhagen, Brussels, and Amsterdam. Coincidentally, this name also refers to a specific type of venomous reptile, the cobra. CoBrA artists focused on organic experimentation and free expression of the unconscious in their art.

Following World War II, the pioneering artists that made up the CoBrA international art movement revolutionized modern art. It was the first really global avant-garde art movement to emerge after World War II. Its participants looked for fresh ways to express themselves that were based on spontaneity and experimentation for modern society.

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Draw the best Lewis structure for CH3-1. What is the formal charge on the C? 4+3+1 A) 0 B) 1 C) -1 D) 2

Answers

The formal charge on the element carbon for the given structure is 0, hence the correct option for the required question is Option A.

The Lewis structure for CH3-1 is shown in the figure
Then the formal charge  cultivated on the central carbon atom can be evaluated is
Formal charge = valence electrons - non-bonding electrons - 1/2 bonding electrons
The valence electrons of carbon are 4 and it possess three single bonds (6 bonding electrons) and one unpaired electron (non-bonding electron). Hence, the formal charge on the central carbon atom evaluated is
Formal charge = 4 - 1 - (6/2) = 0
Therefore, the formal charge cultivated is 0.


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Which forces makes the liquefaction of noble gases possible?

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The liquefaction of noble gases is possible due to the presence of Van der Waals forces, specifically London dispersion forces, which become more significant as the noble gases are cooled and compressed.

What forces are present in Noble gases?

The forces that make the liquefaction of noble gases possible are:

1. Van der Waals forces: These are weak intermolecular forces that arise from temporary fluctuations in electron distribution, resulting in temporary dipoles. Noble gases have low boiling points due to their weak intermolecular forces, and by cooling and compressing them, these forces become significant enough to cause the gases to condense into a liquid.

2. London dispersion forces: These are a specific type of Van der Waals forces that exist between all molecules, including noble gases. They result from the temporary dipoles induced by the movement of electrons around the atoms. As noble gases are cooled and compressed, these forces become more pronounced, leading to their liquefaction.

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What is the density of platinum if it crystallizes in a face-centered cubic unit cell with an edge length of 393 pm?

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The density of platinum with an edge length of 393 pm in a face-centered cubic unit cell is approximately 21,340 kg/m³ or 2.134 x 10⁴ g/m³.

How to determine the density of platinum

The density of platinum can be calculated using the face-centered cubic (fcc) unit cell properties and the given edge length.

In an fcc unit cell, there are 4 atoms per unit cell. The edge length is 393 pm, and the atomic weight of platinum is 195.08 g/mol.

To calculate the density, we'll use the formula:

Density = (Mass of atoms in unit cell) / (Volume of unit cell)

First, we need to find the mass of atoms in the unit cell:

Mass of atoms = (4 atoms/unit cell) * (195.08 g/mol) / (Avogadro's number)

Mass of atoms ≈ 1.297 x 10⁻²¹g

Next, we convert the edge length to meters:

393 pm = 393 x 10⁻¹² m

Now, we calculate the volume of the unit cell:

Volume = (Edge length)³

Volume ≈ 6.077 x 10⁻²⁹ m³

Finally, we find the density:

Density = (Mass of atoms) / (Volume)

Density ≈ 2.134 x 10⁴ g/m³

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Calculate the hydroxide ion concentration in an aqueous solution with a pH of 9.85 at 25°C.
A) 7.1 × 10^-5 M
B) 4.2 × 10^-10 M
C) 8.7 × 10^-10 M
D) 6.5 × 10^-5 M
E) 1.4 × 10^-10 M

Answers

The hydroxide ion concentration in the solution is 7.1 x 10^-11 M, which corresponds to answer choice E). To calculate the hydroxide ion concentration in an aqueous solution, we can use the equation:


pH + pOH = 14
We know the pH of the solution is 9.85, so we can solve for the pOH:
pOH = 14 - 9.85
pOH = 4.15
Now that we know the pOH, we can use the equation for the ion product constant of water (Kw) to calculate the concentration of hydroxide ions:
Kw = [H+][OH-]
1.0 x 10^-14 = (H+)(10^-4.15)
Solving for [OH-]: [OH-] = 10^-14/10^-4.15
[OH-] = 7.1 x 10^-11
Therefore, the hydroxide ion concentration in the solution is 7.1 x 10^-11 M, which corresponds to answer choice E).

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The Cl–Kr–Cl bond angle in KrCl4 is closest to90°109°360°150°120°

Answers

The KrCl₄ molecule is a tetrahedral structure composed of a central Kr atom and four Cl atoms which are located at the corners of a tetrahedron. The bond angle between the Cl atoms and the Kr atom is 120°.

This is because the four Cl atoms form a tetrahedral arrangement with the Kr atom at the center, meaning that the bond angle between the Cl atoms and the Kr atom is the same as the angle between any two adjacent Cl atoms, which is 120°.

This is due to the fact that the Kr atom has four bonding electrons and each Cl atom has one bonding electron, so the electron-electron repulsion is minimized when the molecules are arranged in a tetrahedral shape. This results in the Cl–Kr–Cl bond angle being 120°.

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a 25.0 ml sample of 0.150 m hydrofluoric acid is titrated with a 0.150 m naoh solution. what is the ph at the equivalence point? the ka of hydrofluoric acid is 3.5 × 10-4.

Answers

The pH at the equivalence point is 3.16.

the pH at the equivalence point, we need to first determine the moles of each reactant.

Moles of hydrofluoric acid = (25.0 mL)(0.150 M) = 0.00375 moles

Since the reaction between hydrofluoric acid and sodium hydroxide is a 1:1 ratio, the moles of sodium hydroxide at equivalence point will also be 0.00375 moles.

Next, we can use the balanced chemical equation to find the concentration of hydroxide ions at equivalence point:

HF + NaOH → NaF + H2O

0.00375 moles of NaOH = 0.00375 moles of HF

Using the Ka expression for HF:

Ka = [H+][F-]/[HF]

We can assume that at the equivalence point, all of the HF has reacted with the NaOH to form NaF and water, leaving only F- and some leftover NaOH.

[NaOH] = 0.150 M

[F-] = 0.00375 moles / 0.025 L = 0.15 M

[H+] = Ka x [HF]/[F-] = (3.5 x 10^-4) x (0.00375 moles / 0.025 L) / 0.15 M = 7.0 x 10^-4 M

Using the pH equation:

pH = -log[H+] = -log(7.0 x 10^-4) = 3.16

Therefore, the pH at the equivalence point is 3.16.

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Do conjugate bases of strong acids make good leaving groups? Why? Give some examples of conjugate bases.

Answers

Yes, conjugate bases of strong acids make good leaving groups.

This is because they are stable and highly reactive due to their negative charge. They are also able to stabilize the charge that results from the departure of the leaving group.

Examples of conjugate bases include chloride ion (Cl-), bromide ion (Br-), and iodide ion (I-) which are the conjugate bases of hydrochloric acid (HCl), hydrobromic acid (HBr), and hydroiodic acid (HI) respectively. Another example is the sulfate ion (SO4 2-) which is the conjugate base of sulfuric acid (H2SO4). These all make good leaving groups due to their stability and reactivity.

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the binary star algol has a 3.7 solar mass main sequence star and a 0.8 solar mass red giant. how could that be?

Answers

The Algol binary star system consists of a 3.7 solar mass main sequence star and a 0.8 solar mass red giant due to their different rates of evolution.

How binary star algol has star and a red giant?

The reason for this is that the Algol system is a binary star system, which means that it consists of two stars that orbit around their common center of mass. The main sequence star in the Algol system has a mass of 3.7 solar masses, which is significantly larger than the 0.8 solar mass red giant. The more massive star evolved faster and exhausted its hydrogen fuel, leading to the end of its main-sequence lifetime, while the less massive star is still in the process of fusing hydrogen in its core.

The more massive star evolved into a red giant, while the less massive star is still on the main sequence. The difference in the stars' mass and evolution led to the current configuration of the Algol system.

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select all of the following types of alkyl halides that are capable of forming a carbocation.

Answers

The types of alkyl halides that are capable of forming a carbocation include:

1. Primary alkyl halides (1°): These have the halogen atom bonded to a carbon that is bonded to only one other carbon atom.
2. Secondary alkyl halides (2°): These have the halogen atom bonded to a carbon that is bonded to two other carbon atoms.
3. Tertiary alkyl halides (3°): These have the halogen atom bonded to a carbon that is bonded to three other carbon atoms.

Tertiary alkyl halides are the most capable of forming carbocations due to their greater stability, followed by secondary and primary alkyl halides.

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The Haber process is an industrial procedure for the production of ammonia. It is carried out at a
temperature of 500 °C and a pressure 200 times greater than atmospheric pressure.
a. Why should this procedure be carried out at such high temperatures?
b.How would high pressure benefit this reaction?

Answers

(a.) Higher temperatures give a faster rate of reaction. We've seen before that when reactions are carried out at a higher temperature, they have a faster rate of reaction. In the Haber process, a higher temperature would allow the reaction to occur more quickly.

(b)  If the pressure is increased, the equilibrium position moves to the right, so the yield of ammonia increases. The rate of reaction also increases because the gas molecules are closer together, so successful collisions are more frequent.

Draw the keto tautomeric form of the following compound: Interactive 3D display mode Draw the molecule on the canvas by choosing buttons from the Tools (for bonds), Atoms, and Advanced Template toolbars. The single bond is active by default.

Answers

Keto-enol tautomerism is a chemical equilibrium between an organic chemistry enol (alcohol) and a keto form (a ketone or an aldehyde). There are said to be tautomers between the keto and enol forms.

The image of the keto tautomeric form of the compound (2Z) But-2-en-2-ol is attached below.

In comparison to aldehydes, ketones tend to be more stable and are therefore less likely to produce the enol tautomer because they have two alky groups that donate electron density into the carbonyl carbon.

III>II>I is the order of tautomeric compound stability. The tautomer III has the maximum stability because to the conjugated C=C and C=O double bonds, which leads to delocalization and hydrogen bonding. Additionally, tautomer I is less stable than tautomer II because the enol group is less stable than the keto group.

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The complete question is:

Draw the keto tautomeric form of the following compound: (2Z) But-2-en-2-ol

Interactive 3D display mode Draw the molecule on the canvas by choosing buttons from the Tools (for bonds), Atoms, and Advanced Template toolbars. The single bond is active by default.

Calculate the concentration of H3O⁺ in a solution that contains 5.5 × 10^-5 M OH⁻ at 25°C. Identify the solution as acidic, basic, or neutral.
A) 1.8 × 10^-10 M, basic
B) 1.8 × 10^-10 M, acidic
C) 5.5 × 10^-10 M, neutral
D) 9.2 × 10^-1 M, acidic
E) 9.2 × 10^-1 M, basic

Answers

To calculate the concentration of H3O⁺ in a solution containing 5.5 × 10^-5 M OH⁻ at 25°C, we will use the ion product of water (Kw) formula. At 25°C, Kw = [H3O⁺][OH⁻] = 1.0 × 10^-14.

Step 1: Write down the given values.
[OH⁻] = 5.5 × 10^-5 M
Kw = 1.0 × 10^-14

Step 2: Use the formula to find [H3O⁺].
[H3O⁺] = Kw / [OH⁻]

Step 3: Substitute the given values into the formula.
[H3O⁺] = (1.0 × 10^-14) / (5.5 × 10^-5)

Step 4: Calculate the result.
[H3O⁺] = 1.818 × 10^-10 M (approximately)

Now, we need to identify if the solution is acidic, basic, or neutral. Since [H3O⁺] < [OH⁻], the solution is considered basic.

So the correct answer is:
A) 1.8 × 10^-10 M, basic

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The amide produced from pentanoic acid and ammonia is:_______

Answers

The amide produced from pentanoic acid and ammonia is pentanamide. To form this amide, pentanoic acid reacts with ammonia in a process called amidation.

Here's a step-by-step explanation:

1. Pentanoic acid (C4H9COOH) has a carboxyl group (-COOH) at one end.

2. Ammonia (NH3) has a lone pair of electrons on the nitrogen atom, making it a nucleophile.

3. The nitrogen atom in ammonia attacks the carbonyl carbon atom in pentanoic acid, forming a tetrahedral intermediate.

4. The intermediate collapses, expelling a hydroxyl group (-OH) from the carboxyl group and forming a new bond between the nitrogen and carbonyl carbon atoms.

5. The product is pentanamide (C4H9CONH2), an amide formed from pentanoic acid and ammonia.

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3. In a thermite reaction, aluminum powder undergoes a redox reaction with rust. If 55.0 g of
aluminum reacts completely, what mass of iron is formed? Start by balancing the
equation. Show your work. (3 pts) Al + Fe₂O3 Fe + Al₂O3

Answers

Answer:

Balanced equation: 2Al + Fe₂O₃ → 2Fe + Al₂O₃

Molar mass of aluminum (Al) = 26.98 g/mol

Molar mass of iron (Fe) = 55.85 g/mol

Molar mass of rust (Fe₂O₃) = 159.69 g/mol

Number of moles of aluminum: 55.0 g / 26.98 g/mol = 2.04 mol

Using mole ratio, we can determine that 2 moles of aluminum react with 1 mole of rust to produce 2 moles of iron.

Therefore, number of moles of iron formed = 2.04 mol / 2 = 1.02 mol

Mass of iron formed: 1.02 mol × 55.85 g/mol = 57.0 g

Therefore, 57.0 g of iron is formed.

In a closed rigid system, 7.0 mol CO2,7.0 mol Ar, 7.0 mol N2,and 4.0 mol Ne are trapped, with a total pressure of 10.0 atm. What is the partial pressure exerted by the neon gas? Solve without using a calculator ○ 4.0 atm O 21.0 atm. 0 1.6 atm O 10.0 atm

Answers

The partial pressure exerted by the neon gas is 1.6 atm.

1. Determine the total moles of gas present in the system.
Total moles = moles of CO2 + moles of Ar + moles of N2 + moles of Ne
Total moles = 7.0 + 7.0 + 7.0 + 4.0 = 25.0 moles

2. Calculate the mole fraction of Ne.
Mole fraction of Ne = moles of Ne / total moles
Mole fraction of Ne = 4.0 / 25.0 = 0.16

3. Determine the partial pressure of Ne.
Partial pressure of Ne = mole fraction of Ne × total pressure
Partial pressure of Ne = 0.16 × 10.0 atm = 1.6 atm

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Identify the weakest acid.
A) HF
B) HCl
C) HBr
D) HI
E) Not enough information is available

Answers

To identify the weakest acid among HF, HCl, HBr, and HI, you should consider their acid strength, which is related to the bond dissociation energy.

The acid strength increases as the bond dissociation energy decreases. In other words, the weaker the bond between the hydrogen atom and the halogen atom, the stronger the acid. The bond strength generally decreases down the periodic table, as the size of the halogen atom increases.

Here are the acids in order:

A) HF
B) HCl
C) HBr
D) HI

Given this trend, the weakest acid is HF (A), as it has the strongest bond between hydrogen and the halogen atom (fluorine).

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The chemical law (or principle) which states that equal volumes of all (ideal) gases at the same temperature and pressure contain the same number of molecules was first proposed by (and is typically named after) what Italian chemist?

Answers

The chemical law, which states that equal volumes of all ideal gases at the same temperature and pressure contain the same number of molecules, was first proposed by the Italian chemist Amedeo Avogadro. This principle is typically named after him as Avogadro's Law.

What is Amedeo Avogadro ?

In 1811, Avogadro published an article in a scientific journal, where he distinguished between molecules and atoms. He argued (contrary to what was thought) that in the case of water, the hydrogen and oxygen "atoms" were actually "molecules." One molecule of oxygen would react with two molecules of hydrogen (H2O).

Thus he proclaimed his famous hypothesis: "Equal volumes of any gases contain the same number of molecules when measured under the same conditions of temperature and pressure."

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hint: write a balanced chemical equation that illustrates the standard enthalpy of formation of n2o5. the standard molar internal energy of formation of n2o5(g) is 17.433 kj/mol at 298 k. what is the standard molar enthalpy of formation of n2o5(g) at the same temperature?

Answers

The standard molar enthalpy of the formation of N2O5(g) at 298 K is 19.913 kJ/mol.

To write a balanced chemical equation for the standard enthalpy of formation of N₂O₅, we start with the elements nitrogen and oxygen in their standard states:

N₂(g) + 5/2 O₂(g) → N₂O₅(g)

This equation shows that one mole of N₂ reacts with 2.5 moles of O₂ to form one mole of N₂O₅.

The standard enthalpy of formation, ΔHf°, is defined as the enthalpy change for the formation of one mole of a compound from its constituent elements in their standard states, all at 1 atm pressure and a specified temperature (usually 298 K). The enthalpy change can be calculated from the standard molar internal energy of formation, ΔUf°, using the equation:

ΔHf° = ΔUf° + RT

where R is the gas constant and T is the temperature in Kelvin.

Substituting the given values, we get:

ΔHf° = 17.433 kJ/mol + (8.314 J/mol*K)(298 K) / 1000 J/kJ
ΔHf° = 17.433 kJ/mol + 2.480 kJ/mol
ΔHf° = 19.913 kJ/mol

Therefore, the standard molar enthalpy of the formation of N₂O₅(g) at 298 K is 19.913 kJ/mol.

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How is the true electron density determined from a molecule with various resonance forms?

Answers

The true electron density of a molecule with various resonance forms is determined by considering the contributions of each resonance structure and creating a resonance hybrid that represents the weighted average of these structures.

What is the difference between true electron density and other resonance forms?

To determine the true electron density in a molecule with various resonance forms, you need to consider the concept of resonance hybrid.

1. Identify the resonance forms: First, draw all the possible resonance structures for the molecule, ensuring that they follow the basic principles of resonance.

2. Evaluate resonance contributors: Assess the importance of each resonance structure based on its stability and contribution to the overall structure. More stable resonance forms have a greater contribution to the true electron density.

3. Resonance hybrid: Combine the resonance forms to create a single resonance hybrid. This hybrid represents the true electron density distribution of the molecule by taking into account the weighted average of all resonance structures.

4. Calculate electron density: Use the resonance hybrid to calculate the electron density distribution in the molecule. This will give you the most accurate representation of the true electron density, as it considers the contributions of all resonance forms.

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What is the initial pressure of a gas in balloon that has a volume of 14. 0 L and a temperature of 36 C when it was moved into a location with pressure of 5. 0 atm, 6. 0 L and 18. 0 C

Answers

7.45 atm is the initial pressure of a gas in balloon that has a volume of 14. 0 L and a temperature of 36 C when it was moved into a location with pressure of 5. 0 atm, 6. 0 L and 18. 0 C.

The ideal gas law, which links a gas's pressure, volume, temperature, and number of moles (n), can be used to address this issue:

PV = nRT

where R is the constant of an ideal gas.

We must use the initial circumstances existing before the balloon was relocated in order to determine the gas's initial pressure. The volume (V) and temperature (T) are known, but we still need to determine the amount of gas per mole (n).

n = PV/RT

By considering the starting conditions, we may determine n:

n = (P₁V₁)/(R*T₁)

where P1, V1, and T1 are the starting pressure, volume, and temperature, respectively.

n is calculated as (P114.0 L)/(0.0821L atm/mol*K * (36+273) K).

Now we may utilize the last circumstances to get the gas's final pressure:

P₂V₂ = nRT₂

where T₂ is the final temperature and V₂ the final volume.

P₂ = (nRT₂)/V₂

(P₁V₁T₂) (V₂*T₁)

P₂ is equal to (P114.0 L(18+273 K)/(6.0 L*(36+273 K)).

P₂ = 3.22 atm

The ideal gas law can also be used to determine the initial pressure:

P₁ = nRT₁/V₁

P₁ = (nRT₁)/V₁

P₁ = (14.0 L * 0.0821 L atm/molK * (36+273) K) / (3.22 atm * 6.0 L * (36+273) K).

P₁ = 7.45 atm

As a result, the balloon's gas had a 7.45 atm beginning pressure.

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1.0 mol of oxygen gas is added to a container at 25c. the pressure is adjusted to 101.352 kpa. what is the volume?

Answers

The volume of the container is approximately 24.46 liters.

To determine the volume of 1.0 mol of oxygen gas in a container at 25°C and 101.352 kPa, we can use the Ideal Gas Law formula:
PV = nRT
Where:
P = pressure (in atm)
V = volume (in L)
n = number of moles
R = gas constant (0.0821 L atm/mol K)
T = temperature (in K)

First, we need to convert the temperature from Celsius to Kelvin:
T = 25°C + 273.15 = 298.15 K
Next, we need to convert the pressure from kPa to atm:
1 atm = 101.325 kPa
P = 101.352 kPa * (1 atm/101.325 kPa) = 1.000267 atm

Now, we can solve for the volume (V) using the Ideal Gas Law formula:
V = nRT/P
Plugging in the values:
V = (1.0 mol) * (0.0821 L atm/mol K) * (298.15 K) / (1.000267 atm)
V ≈ 24.46 L
The volume of the container is approximately 24.46 liters.

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