Write the rate law expected for this mechanism. What is the overall balanced equation for the reaction? What are the intermediates in the proposed mechanism?

Answer:

0.075 moles

Explanation:

Looking at the balanced equation, 4 moles of Fe(s) react with 3 moles of [tex]O_{2}[/tex] to produce 2 moles of [tex]Fe_{2}O_{3}[/tex] (s). In other words, for every 4 moles of Fe(s) used, there are 2 moles of product. The mole ratio is therefore 4:2, or 2:1. In other words, you divide the moles of Fe by two to find the moles of product.

There are 0.15 moles of Fe, so the moles of product should be half of this according to the molar ratio.

Your answer is 0.075 moles.

Hope this helps!

Yes, you can determine if the temperature inside a freezer is below 0°C by using a glass of liquid water. Here's how:

However, it is not possible to determine the exact temperature of the freezer by just using a glass of water. The temperature can only be estimated by observing the state of the water and making a rough guess based on the extent of the freezing.

For example, if the water is just starting to freeze, then the temperature could be close to 0°C. If the water has mostly frozen, then the temperature could be closer to -10°C. However, without a thermometer, the exact temperature cannot be determined.

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Answer:

(c) 4.4g

Explanation:

Given:

mass of calcium carbonate (mCaCO3) = 10g

MrCaCO3 = 100

To find: mCO2

Solution:

CaCO3 + 2HCl → CaCl 2 + H2O + CO2

Now,

MrCaCO3 = 40 + 12 + 16.3 = 100

Therefore,

Number of moles (n) = m/Mr

nCaCO3 = 10/100 = 0.1

The amount of moles is proportional to the coefficient of the reaction. Since both calcium carbonate (CaCO3) and carbon dioxide (CO2) have the same coefficient.

nCO2 = 0.1

MrCO2 = 12 + 16.2 = 44

mCO2 = 0.1 × 44 = 4.4g

ANS = 0.288 L can be made.

The first thing that you need to do here is to convert the mass of lithium bromide to moles by using the compound's molar mass.

The number of moles of the solute—in your example, lithium bromide—present per 1.00 L of the solution is simply referred to as the molarity of the solution.

For every 1.00 L of this solution, 4.00 moles of lithium bromide must be present in order to create a 4.00-M solution.

You may calculate how many litres of this solution can be made using the molarity of the solution as a conversion factor because you already know that your sample contains 1.1515 moles of lithium bromide.

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Answer:

the pH of the solution is 5.5.

Explanation:

the concentration is 5 moles per liter and the acidity or alkalinity is 0.5 moles per liter.

The total change in entropy is equal to the sum of heat transfer (in Joules) divided by the absolute temperature (in Kelvin) of the system. In equation form, the total change in entropy (ΔS) is equal to the sum of heat transfer (Q) divided by the absolute temperature (T):  ΔS = Q/T.

Entropy is the measure of randomness in a macroscopic system. It is equal with the ratio of heat absorbed in Joules (Q) and the temperature at which the heat is absorbed in Kelvin (T). If one wants the entropy to decrease, they must transfer the energy from outside the system.

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If a reaction is first order with a rate constant of 0.0450 s⁻¹, 23.3 sec is the  time that is required for 65% of the initial quantity of reactant to be consumed.

A first-order reaction in chemistry is a particular kind of chemical process where the rate of the reaction is exactly related to the concentration of just one ingredient. With respect to that specific reactant, the reaction rate is referred to as first-order.

First order rate law is given by,

A = A0 × [tex]\rm e^{-kt}[/tex]

A0 = Initial concentration=100 M

A = Final concentration=35 M (65% is consumed means 35% is the remaining compound)

K = Rate constant = 0.0450 [tex]\rm s^{-1}[/tex]

Substituting,

35 = 100 × [tex]\rm e^{-0.0450 \times t}[/tex]

e-0.0450×t = 0.35

- 0.0450×t = ln(0.35)

-0.0450×t = -1.05

t = 23.3 sec

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Oxalic acid is a colorless, crystalline, organic compound belonging to the family of carboxylic acids. It is a strong dicarboxylic acid, with the molecular formula [tex]H2C2O4[/tex].

Given the volume of oxalic acid (h2c2o4) = 50mL

the concentration of oxalic acid = 0.080M

1. Calculate the moles of [tex]H2C2O4[/tex] needed for the solution:

Moles of [tex]H2C2O4[/tex] = (50.0 mL x 0.080 M) / 1000 mL = 0.004 moles

2. Calculate the mass of [tex]H2C2O4[/tex] needed for the solution:

Mass of [tex]H2C2O4[/tex] = 0.004 moles x 90.03 g/mol = 0.3609 g

3. Place 0.3609 g of [tex]H2C2O4[/tex] into a beaker and add 50.0 mL of distilled water.

4. Stir the solution to dissolve the [tex]H2C2O4[/tex].

5. If necessary, add more distilled water to make sure all of the oxalic acid has dissolved.

6. Measure the final volume of the solution and calculate the molarity:

Molarity = (0.004 moles x 1000 mL) / Final Volume (mL)

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Answer:

B) Fuel burns and heats the surroundings

D) A car's air bag expands by igniting a chemical.

Explanation:

These two phenomena are caused by chemical reactions that release energy. In the case of B, fuel burning releases energy in the form of heat and light. In the case of D, the ignition of a chemical in a car's air bag rapidly releases a large amount of energy, causing the air bag to rapidly inflate and protect the occupants of the car during an accident.


ALLEN

Answer:

D) A car's air bag expands by igniting a chemical.

Explanation:

Fireworks are a type of pyrotechnic display that are created by chemical reactions that release energy in the form of light, heat, and sound. These chemical reactions are usually accomplished through the use of oxidizers, fuel, and various chemicals that are carefully combined to produce the desired effects.

A) Muscles work to perform a task is not caused by a chemical reaction that releases energy. Instead, it is caused by the contraction of muscle fibers, which generate force to move the body or an object.

B) Fuel burns and heats the surroundings is caused by a chemical reaction that releases energy. When fuel, such as gasoline or wood, is burned, it reacts with oxygen in the air to release heat and light.

C) A battery supplies current to a device is not caused by a chemical reaction that releases energy. Instead, it is caused by the flow of electrons through a conductive material, such as a wire.

D) A car's air bag expands by igniting a chemical is caused by a chemical reaction that releases energy. The air bag is typically activated by a chemical reaction between two substances that generates a large amount of gas, which rapidly inflates the air bag to protect the occupants of the vehicle.

There are 1.81 × 10²⁴ molecules of sucrose in the given sample.

To calculate the number of molecules of sucrose in the given sample, we need to first determine the number of moles of carbon atoms present in the sample, and then use the molecular formula of sucrose to calculate the number of molecules.

Calculate the number of moles of carbon atoms in the sample:

We know that the sample contains 3.6 × 10²⁴ atoms of carbon. The molar mass of carbon is approximately 12 g/mol.

Therefore, the mass of carbon in the sample can be calculated as follows:

mass of carbon = number of atoms of carbon × molar mass of carbon

= 3.6 × 10²⁴ × 12 g/mol

= 4.32 × 10²⁵ g

To calculate the number of moles of carbon in the sample, we divide the mass of carbon by the molar mass of carbon:

number of moles of carbon = mass of carbon / molar mass of carbon

= 4.32 × 10²⁵ g / 12 g/mol

= 3.6 × 10²⁴ mol

Calculate the number of molecules of sucrose in the sample:

To calculate the number of molecules of sucrose in the sample, we can use the following formula:

number of molecules of sucrose = (number of moles of carbon / 12) × Avogadro's number

where;

Substituting the values, we get:

number of molecules of sucrose = (3.6 × 10²⁴ mol / 12) × 6.02 × 10²³ molecules/mol

= 1.81 × 10²⁴ molecules

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Answer:

I guess your answer would be A even thought it is not actually correct it is the closest to being correct.

Explanation:

The molar mass of Al2(SO4)3 is 342.15 g/mol. This means that 1 mole of Al2(SO4)3 has a mass of 342.15 g.To find the mass of sulfur in 2.0 moles of Al2(SO4)3, we first need to determine the number of moles of sulfur in 1 mole of Al2(SO4)3. There are 3 moles of sulfur in 1 mole of Al2(SO4)3, so there are 6 moles of sulfur in 2 moles of Al2(SO4)3.To find the mass of sulfur in 2.0 moles of Al2(SO4)3, we can use the following calculation:Mass of sulfur = (moles of sulfur) x (molar mass of sulfur)

Mass of sulfur = 6 mol x 32.06 g/mol

Mass of sulfur = 192.36 gTherefore, the mass of sulfur in 2.0 moles of Al2(SO4)3 is 192.36 grams.

The correct answer is

Aldehyde would have the highest boiling point

Aldehydes and ketone both include a carbonyl group. Aldehydes are thought to be the most important functional group. They go by the labels formyl or methanoyl group. Aldehydes get their name from the dehydration of alcohols. Aldehydes have a carbonyl group attached to at least one hydrogen atom. In ketones, the carbonyl group is joined to two carbon atoms.

Examples of organic compounds with the carbonyl functional group, or C=O, include aldehydes and ketones. The carbon atom of this group has two empty bonds that may be filled with hydrogen, an alkyl group, or an aryl group. If at least one of these substituents is hydrogen, the compound is an aldehyde. If none of these contains hydrogen, the material is a ketone.

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Answer:

Non-Electrolyte

Explanation:

Glucose is a covalent compound that is formed by the sharing of electrons between the constituent atoms of glucose.

The gram formula mass of a compound if 5 moles of the compound have a mass of 100 grams would be 20 grams/mole.

The gram formula mass of a compound is the total weight of all atoms in a molecule or a formula unit of a substance.

It is also the ratio of the mass of a compound and the number of moles present in the mass of the compound.

Gram formula mass = mass/mole

In this case, mass = 100 grams, and mole = 5 moles

Gram formula mass = 100/5

                                 = 20 grams/mole

In other words, the gram formula mass of the compound is 20 grams/mole.

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Copper is an element which comprises of same kind of atoms which can be illustrated by the images.

It is defined as a substance which cannot be broken down further into any other substance. Each element is made up of its own type of atom. Due to this reason all elements are different from one another.

Elements can be classified as metals and non-metals. Metals are shiny and conduct electricity and are all solids at room temperature except mercury. Non-metals do not conduct electricity and are mostly gases at room temperature except carbon and sulfur.

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Your question is incomplete, but most probably your  full question with attached image is:Copper is an element. How do these images of copper illustrate this?

Answer:

3.784

Explanation:

Answer: 3.784

Explanation:

Answer:

okay

Explanation:

Coconut, palm, mangroves, water lily, water mint, are a few examples of plants whose seed are dispersed by the water.

A piston confines 0.200 mol Ne(g) in 1.20 l at 25 °C . Two experiments are performed. The process does more work is the second experiment.

(a) The gas is allowed to expand through the additional 1.20 L against the  constant pressure of the 1.00atm

Irreversible path is as :

W = -Pex × ΔV

Where

Pex = 1.00 atm

ΔV = 1.20 L

W = - (1.00 atm) × 1.20 L

W = -1.20 L. atm  × 101.325 J /1 L.atm

W = -121.59 J

(b)  The gas is allowed to expand the reversibly and the  isothermally to the same final volume is as :

W = - nRT ln (V final / V initial)

Where

n = the number of moles = 0.200

R = gas constant = 8.3145 J/K.mol

T = 298 Kelvin

V final / V initial  = 2.40 / 1.20 = 2

W = - (0.200mol) × 8.3145 J/K.mol × 298K × ln(2.4/1.2)

W = - 343.5 J

Thus the second one does the more work.

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Both cohesion and adhesion involve the attraction between molecules, cohesion refers to the attraction between molecules of the same substance, while adhesion refers to the attraction between molecules of different substances.

Comparison of the two properties are: Definition: Cohesion refers to the attraction between molecules of the same substance, while adhesion refers to the attraction between molecules of different substances.

Forces involved: Cohesion involves intermolecular forces (such as hydrogen bonding) that hold the molecules of the same substance together. Adhesion involves the forces of attraction between two different substances, such as the attraction between water molecules and the surface of a glass.

Surface tension: Cohesion contributes to the surface tension of a liquid, which is the property that allows some insects to walk on water without sinking. Adhesion also contributes to the surface tension, as it causes the liquid to adhere to the surface.

Applications: Cohesion is important in determining the physical properties of liquids, such as their viscosity and boiling point. Adhesion is important in many practical applications, such as adhesives and coatings that need to stick to different surfaces.

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The number of oscillations made by the wave in one second is defined as the frequency. The wavelength of a photon with frequency 5.7 x 10¹⁴ Hz is 5.263 × 10⁻⁷.

The wavelength of light is defined as the distance between the two successive crests or troughs of the light wave is defined as the wavelength. It is denoted by the letter λ (lambda).

The equation connecting the wavelength of light with frequency and speed of light is:

λ = c / ν

c - speed of light = 3.00 × 10⁸ m/s

ν - frequency of light = 5.7 x 10¹⁴ Hz

λ = 3.00 × 10⁸ m/s /  5.7 x 10¹⁴ Hz = 5.26 × 10⁻⁷

Thus the wavelength of light is 5.263 × 10⁻⁷ .

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The boiling point of a solution depends on the concentration of solute in the solution. When a solute is dissolved in a solvent, it raises the boiling point of the solution compared to the boiling point of the pure solvent. This is because the solute particles interfere with the hydrogen bonding between the solvent molecules, making it more difficult for the solvent to evaporate.

In this case, 180.00 grams of C6H12O6 (glucose) has been dissolved in 1,000.0 grams of water, so the concentration of glucose in the solution is 180.00 g / 1000.0 g = 0.18 g/g, or 18%.

The boiling point of a solution can be estimated using the formula ΔTb = Kb x molality, where ΔTb is the change in boiling point, Kb is the molal boiling point constant for water (0.512 °C/m), and molality is the concentration of solute in the solution in moles per kilogram of solvent.

Using this formula, the change in boiling point for the glucose solution can be calculated as follows:

ΔTb = Kb x molality = 0.512 °C/m x (0.18 moles/kg) = 0.093 °C

The boiling point of pure water at 1 atmosphere is 100.0 °C, so the boiling point of the glucose solution is 100.0 °C + 0.093 °C = 100.093 °C.

Therefore, the answer to the question is (3) 99.48°C.

It is estimated that since the beginning of the Industrial Revolution, approximately 30% of the carbon dioxide (CO2) emitted by human activities has been absorbed by the oceans, leading to a process known as ocean acidification.

This absorption has helped to mitigate the effects of climate change, but it has also had negative impacts on marine ecosystems, including changes in ocean chemistry and increased acidity, which can harm marine organisms such as shellfish and coral. It is important to note that while the ocean has played an important role in mitigating climate change, continued emissions of carbon dioxide into the atmosphere will continue to have negative impacts on the environment and the climate system.

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This error would cause the gas constant to be underestimated because the gas constant is a function of temperature and pressure.

If the temperature is underestimated, then the pressure calculated would be too high, resulting in an underestimation of the gas constant. The gas constant would remain unaffected because it does not depend on the temperature of the hydrogen gas. The gas constant is a physical constant which is the same for all gases regardless of their temperature or pressure. The gas constant is defined as the ratio of the universal gas constant (R) to the molar mass (M) of a particular gas. It is a measure of the ideal gas law and is equal to 8.3144598 joules per Kelvin per mole (J/K/mol). Therefore, an error in the temperature of the hydrogen gas would not affect the gas constant.

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The net ionic equation for the precipitation reaction when aqueous sodium phosphate and magnesium chloride are combined is 3MgCl2 (aq) + 2Na3(PO4) (aq) -----> Mg3(PO4)2 (s) + 3Na+ (aq) + 3Cl- (aq).

Taken moles of magnesium chloride equal 0.125 * 0.22, or 0.02775 moles.

Taken moles of sodium phosphate equal 0.225*0.105, or 0.023625 moles.

Magnesium chloride is the limiting reagent in the process, according to stoichiometry.

Hence, the moles of magnesium phosohate that will develop are: 0.02775/3 = 0.00925

Mass of magnesium phosphate ppt is therefore equal to moles*MW = 0.00925*263 = 2.432 g.

MgCl2 and H2 are produced when solid magnesium interacts with HCl. It goes like this: Mg(s) + 2HCl(aq) = MgCl2(aq) + H2 (g). HCl and solid magnesium carbonate react to form MgCl2, CO2, and H2O.

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To solve this we must know the concept behind the phenomenon of elevation in boiling point when a non volatile solute is added to any solvent. Therefore, boiling point in °C of a 0.527 m aqueous solution of LiBr is  100.54 °C.

Mathematically,

ΔT= Kb× molality

The complete balanced equation can be written as

LiBr → Li⁺ + Br⁻ [two ions]

substituting all the given values in the above mathematical expression, we get

(0.527 m LiBr) x (2 mol ions / 1 mol LiBr) = 1.054 m ions

(0.512 °C/m) x (1.054 m) = 0.540 °C change

100.00°C + 0.540 °C = 100.54 °C

Therefore, the boiling point in °C of a 0.527 m aqueous solution of LiBr is  100.54 °C.

What is elevation in boiling point ?

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It's worth noting that the exact composition of the air can vary depending on the location and the time of year, but these substances are the most abundant gases found in the Earth's atmosphere.

The substances in the air you breathe are typically ranked in terms of their abundance as follows:

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Answer:

To calculate the volume of oxygen that will be required to burn 300 liters of ethane containing 5.8% non-combustible impurities, we need to determine the amount of pure ethane present.

Since the ethane contains 5.8% non-combustible impurities, 100 - 5.8 = 94.2% of the 300 liters of ethane is pure and can be burned.

The amount of pure ethane is 94.2% * 300 liters = 282.6 liters.

The stoichiometric equation for the complete combustion of ethane is:

C2H6 + 7O2 -> 4H2O + 6CO2

This equation tells us that for every molecule of ethane that is burned, 7 molecules of oxygen are required.

The volume of oxygen required for burning 282.6 liters of ethane is 282.6 liters * 7 = 1989.2 liters.

So, the volume of oxygen that will be required to burn 300 liters of ethane containing 5.8% non-combustible impurities is 1989.2 liters.

Assuming that the non-combustible impurities have no effect on the combustion of ethane, we can calculate the volume of oxygen required to burn 300 liters of ethane as follows:

Write the balanced chemical equation for the combustion of ethane:

C2H6 + 3.5 O2 -> 2 CO2 + 3 H2O

Determine the stoichiometry of the reaction, which tells us the molar ratio of ethane to oxygen required for complete combustion. From the balanced equation, we see that 1 mole of ethane reacts with 3.5 moles of oxygen.

PV = nRT

where P is the pressure of the gas, V is the volume of the gas, n is the number of moles of gas, R is the gas constant, and T is the temperature of the gas. Assuming standard temperature and pressure (STP), which is 1 atm and 0°C, we have:

n = PV/RT = (1 atm * 300 L)/(0.08206 Latm/molK * 273 K) = 12.5 moles of ethane

3.5 moles of O2 are required for 1 mole of ethane, so for 12.5 moles of ethane, we need:

12.5 moles of ethane * 3.5 moles of O2/mole of ethane = 43.75 moles of O2

V = nRT/P = (43.75 mol * 0.08206 Latm/molK * 273 K)/1 atm = 994.8 L of O2

Therefore, approximately 994.8 liters of oxygen will be spent on burning 300 liters of ethane containing 5.8% non-combustible impurities.

An ionic bond is a stable bond created by the full transfer of the valence electron.

When an electron moves from one atom or molecule to another one of these chemical entities, this is known as electron transfer. When it comes to specific redox reactions involving the transfer of electrons, ET is a mechanistic description. ETRs are electrochemical processes.

ETRs are electrochemical processes. Transition metal complexes are frequently used in ET processes, which are relevant to respiration and photosynthesis. ET is a step in various commercial polymerization processes in organic chemistry. It serves as the basis for photoredox catalysis.

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the rate of appearance of O2 at that particular moment would be 0.280 mol/min for  no2 is equal to 0.560 mol/min at a particular moment.

The balanced chemical equation for the reaction that produces NO2 and O2 would be helpful to answer this question. Assuming the reaction is:

2 NO → 2 NO2 + O2

The stoichiometry of the reaction tells us that for every 2 moles of NO that disappear, 2 moles of NO2 and 1 mole of O2 are produced. Therefore, the rate of appearance of O2 would be half the rate of appearance of NO2, or:

Rate of appearance of O2 = (0.560 mol/min) / 2 = 0.280 mol/min

So the rate of appearance of O2 at that particular moment would be 0.280 mol/min.

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