according to this chemical reaction, calculate the number of grams of Fe (55.85 g/mol) produced from 12.57 grams of H2 (2.02 g/mol). Report your answer to the hundredths.

Answer:

metallic bond

Explanation:

Metallic bonds are the attraction between a positive metal ion and the electrons surrounding them.

This bond is found in metals and their alloys. They are interatomic forces.

The given reaction is a dehydrohalogenation reaction. The following reaction depicts the dehydrohalogenation of 3-bromopentane:Thus, 3-bromopentane gives the alkene shown as the major product of the reaction.

Dehydrohalogenation is an elimination reaction, which involves the removal of a proton from the β-carbon, and the halide ion from the α-carbon of the alkyl halide. The removal of the proton and halide ion from the adjacent carbons forms a pi bond.  This type of reaction gives an alkene as the final product.

Therefore, the alkyl bromide which can give the alkene shown as the major product of the following reaction is the one which possesses adjacent beta-hydrogen atoms.

The bromoalkane shown in the reaction below has three beta-hydrogens so that 3- bromopentane will give 2-pentene as the major product. The following reaction depicts the dehydrohalogenation of 3-bromopentane:Thus, 3-bromopentane gives the alkene shown as the major product of the reaction.

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Two important scientific discoveries related to cell theory that were mentioned in the video are Robert Hooke's discovery of cells and Antonie van Leeuwenhoek's discovery of single-celled organisms.

1. Robert Hooke's discovery of cells: In 1665, Robert Hooke observed thin slices of cork under a microscope and noticed small compartments that he named "cells" due to their resemblance to the cells in a monastery. This discovery was important because it provided the first evidence that living organisms were composed of individual units or cells.

2. Antonie van Leeuwenhoek's discovery of single-celled organisms: In the late 1600s, Antonie van Leeuwenhoek used a microscope to observe a variety of samples, including water, blood, and even his own saliva. He discovered tiny, single-celled organisms that he called "animalcules." This discovery was significant because it showed that living organisms could exist as single cells, which supported the idea that cells were the basic building blocks of life.

These two discoveries were related to one another because they both contributed to the development of cell theory, which states that all living organisms are composed of cells and that cells are the basic unit of life. Hooke's discovery of cells provided the initial evidence for this theory, while van Leeuwenhoek's discovery of single-celled organisms supported the idea that cells could exist independently as functional units of life. Together, these discoveries helped to establish the concept of cell theory as we know it today, which has been further refined and expanded upon by subsequent scientific research.

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chemical potential energy, thermal energy, electrical energy, sound energy

Explanation:

the coal is chemical potential energy because it is just sitting there, the coal fueled power plant is thermal energy because it is using the heat from the coal to work the power plant, that is then turned into electrical energy, which then goes to the radio which displays sound energy

Answer:

y = 0.037 M = [O₂]

Explanation:

Let's write the equilibrium reaction:

2CO₂ <--------> 2CO + O₂      K = 2x10⁻⁶

The problem states that we have initially 15.95 mol of CO₂ in a 1.6 L  vessel. With this we can determine the concentration:

M = moles / V

[CO₂] = 15.95 / 1.6 = 9.97 M

Now, we need to write an ICE chart so we can have the equilibrium concentrations:

          2CO₂ <--------> 2CO + O₂      K = 2x10⁻⁶

I.         9.97                     0       0

C.         -2y                  +2y     +y

E.        9.97-2y              2y      y

K = [CO]² [O₂] / [CO₂]²            Replacing we have:

2x10⁻⁶ = (2y)² (y)² / (9.97 - 2y)²      But K is <10⁻⁴ so we can neglect the substraction of 9.97 - 2y, we have then:

2x10⁻⁶ = 4y² (y) / (9.97)²

2x10⁻⁶ * (9,97)² = 4y³

y = ∛2x10⁻⁶ * (9,97)² / 4

Hope this helps

When diluting an acid, it is recommended to add the acid to water and not the other way around (adding water to acid). This is because the process of mixing an acid with water can release a significant amount of heat, and adding water to concentrated acid can lead to vigorous and potentially dangerous reactions.

Here are a few reasons why it is safer to add acid to water:

Heat Dissipation: The dilution of strong acids is an exothermic process, which means it releases heat. By adding the acid slowly to water while stirring, the heat generated can be dissipated more effectively. On the other hand, if water is added to concentrated acid, there is a risk of localized heating and potential splattering due to rapid boiling or splashing of the hot acid.

Spattering and Splashing: When water is added to concentrated acid, there is a higher likelihood of spattering and splashing of the acid, which can cause burns or injuries. Adding acid to water allows for better control and minimizes the chances of violent reactions or sudden release of energy.

Dilution Gradually: By adding acid to water, you can gradually increase the volume and concentration, ensuring better mixing and distribution of the acid in the water. This helps prevent localized high concentrations of acid that could lead to rapid reactions.

Acidic Fumes and Aerosols: Concentrated acids often release fumes and aerosols that can be hazardous to inhale. By adding acid to water, any released fumes or aerosols are more likely to be contained within the larger volume of the solution, reducing the risk of exposure.

It's important to follow proper safety protocols, wear appropriate protective equipment (such as gloves and goggles), work in a well-ventilated area, and consult specific guidelines or procedures provided by chemical manufacturers or regulatory agencies when handling and diluting acids.

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Answer:

Mass of Cl = 35.5

Mass of Cl2 => 35.5×2

=> 71 g/mol

hope that helps ✌

71

The atomic mass of chlorine is equal to the molar mass of chlorine so the molar mass of chlorine is 35.5

=> molar mass for Cl^2: 35,5*2=71

you would have to kn

The force of attraction that holds metals together; consists of the attraction of free-floating valence electrons for positively charged metal ions (cations) and is known as metallic bonding.

In а metаllic bond, the metаl аtoms' vаlence electrons аre free to move throughout the substаnce's structure, providing the metаl with the unique properties thаt mаke it а useful mаteriаl for а vаriety of аpplicаtions, including electricity аnd heаt conductivity, mаlleаbility, аnd ductility.

The seа of free electrons is responsible for the metаl's conductivity becаuse it enаbles electrons to move through the substаnce reаdily. Metаllic bonds аre weаker thаn covаlent or ionic bonds, аnd they do not produce ions. Insteаd, the bonding involves а free electron seа of delocаlized electrons thаt move аcross metаl аtoms in а lаttice.

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When 2.00 moles of N2 react with sufficient H2, the balanced chemical equation for the synthesis of ammonia (NH3) is N2(g) + 3H2(g) → 2NH3(g).

According to the stoichiometry of the reaction, 1 mole of N2 reacts with 3 moles of H2 to produce 2 moles of NH3. Since you have 2.00 moles of N2 reacting, you can use the mole ratio to determine the moles of NH3 produced:
(2 moles NH3 / 1 mole N2) × 2.00 moles N2 = 4.00 moles NH3,

So, when 2.00 moles of N2 react with sufficient H2, 4.00 moles of NH3 will be produced.

38.5 g is the mass of nitrogen.

generated moles of ammonia Chemical formula

N₂ + 3H₂ → 2NH₃

Number of nitrogen moles: Mass x molar mass equals number of moles 38.5 g/28 g/mol is the weight in moles.

1.375 mol is the number of moles.

The moles of ammonia and nitrogen from the balance chemical equation will now be compared.

 N₂ : NH₃ 1 : 2

1.375 : 2×1.375 = 2.75 mole..Thus, from 38.5 g of nitrogen, 2.75 moles of ammonia are created.

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The specific surface area per mL is 251 m²/mL, and the specific surface area per gram is 251 m²/g.

To calculate the specific surface area per mL and per gram accurately, we need to consider the dimensions and units properly.

Given:

Granule size: 5 micrometers

Density: 2 g/mL

First, let's calculate the surface area of a single granule. The surface area of a sphere is given by the formula:

Surface area = 4πr²

where r is the radius of the sphere.

The radius of a granule is half of its diameter, so the radius would be 2.5 micrometers (0.0025 mm).

Surface area of a single granule = 4π(0.0025 mm)² = 4π(6.25 × 10^(-9) mm²) = 3.14 × 10^(-8) mm²

Next, let's calculate the number of granules in 1 mL and 1 gram of the sample.

1 mL of the sample has a volume of 1 mL, and since the density is 2 g/mL, the mass of 1 mL of the sample is 2 grams.

Number of granules in 1 mL = (1 mL / 5 micrometers)^3

= (1 mL / (5 × 10^(-3) mm))^3

= (1 × 10^6 mm³ / (5 × 10^(-3) mm))^3

= (2 × 10^5)^3 = 8 × 10^15 granules

Number of granules in 1 gram = (1 gram / 2 grams) × (1 mL / 5 micrometers)^3

= (1 × 10^3 mm³ / (5 × 10^(-3) mm))^3

= (2 × 10^5)^3

= 8 × 10^15 granules

Finally, we can calculate the specific surface area per mL and per gram:

Specific surface area per mL

= Surface area of a single granule × Number of granules in 1 mL

= 3.14 × 10^(-8) mm² × 8 × 10^15

= 2.51 × 10^8 mm²

Specific surface area per gram = Surface area of a single granule × Number of granules in 1 gram = 3.14 × 10^(-8) mm² × 8 × 10^15 = 2.51 × 10^8 mm²

To convert the specific surface area from mm² to m², we divide by 10^6:

Specific surface area per mL = 2.51 × 10^8 mm² / 10^6 = 251 m²/mL

Specific surface area per gram = 2.51 × 10^8 mm² / 10^6 = 251 m²/g

Therefore, the specific surface area per mL is 251 m²/mL, and the specific surface area per gram is 251 m²/g.

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Answer:10

Explanation:

Multiply the volume by the density to get the mass.

Divide the mass by the molar mass to get the number of moles.

Answer:

177.3kg C₂₁H₄₄

Explanation:

Based on the chemical reaction:

C₂₁H₄₄ → 3C₂H₄ + C₁₅H₃₂

Where 1 mole of C₂₁H₄₄ produce 3 moles of ethene, C₂H₄.

To solve this question we need to determine the moles of ethene in 50.4kg. 1/3 these moles are the moles of C₂₁H₄₄ that must be added:

Moles Ethene -Molar mass: 28.05g/mol-

50.4kg = 50400g * (1mol / 28.05g) = 1796.8 moles of ethene

Moles C₂₁H₄₄:

1796.8 moles of ethene * (1 mol C₂₁H₄₄ / 3 mol C₂H₄) = 589.93 moles C₂₁H₄₄

Mass C₂₁H₄₄:

589.93 moles C₂₁H₄₄ * (296g / mol) = 177283g =

The equilibrium conversion to hydrogen decreases when steam is added to the feed and everything else kept the same for the following reaction: C₄H₈ < == > C₄H₆ + H₂.

Conversion is defined as the transformation of a compound into another, as a result of a chemical reaction. Equilibrium conversion is the extent of conversion when a chemical reaction proceeds to equilibrium. For the given reaction:C4H8 < == > C₄H₆ +H₂

The conversion of C₄H₈ to C₄H₆ and H₂ is decreased when steam is added to the feed and everything else kept the same. The decrease in conversion is due to the Le Chatelier's principle. It states that when a system in chemical equilibrium is subjected to a change in temperature, pressure, or concentration of reactants or products, the system shifts in equilibrium position to counteract the effect of the change.

As per the principle, the system will counteract the increase in the concentration of water molecules by moving in the direction that reduces the concentration of water molecules, that is, backward.

This causes the reverse reaction to occur more and reduces the conversion of C₄H₈ to  C₄H₆ and H₂. Hence, the equilibrium conversion to hydrogen decreases when steam is added to the feed and everything else kept the same.

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Answer:

50 Points Help 1) Find the mass of 250.0 mL of benzene. The density of benzene is 0.8765 g/mL.  

7) What volume of silver metal will weigh exactly 2500.0 g. The density of silver is 10.5 g/cm3.

Answer:

At 13.6 C, a 1.2 mole sample of a gas exerts a pressure of 2.4 atmospheres. 1 point If you were solving for volume, what number would you use for temperature in the ideal gas law equation (PV = nRT)? о O 13.6 o 1.2 0 24 O 286.6 0 275.4

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There can be emissions of radiations like gamma radiation. There can be emission of particles too like alpha particle. Therefore, the  nature of radioactive decay does not support the given statement.

Nuclear decay is process in which the radioactive element releases particles or radiations. Alpha particles is ⁴₂He. Alpha particle is nothing but helium particle. Decay of radioactive element always comes under first order kinetics.

The rate law for first order kinetics is

K=(2.303/T)×log(a/a-x)

half life=0.693/K

Where

k - rate constant

t - time passed by the sample

a - initial amount of the reactant

a-x - amount left after the decay process

Consistency and predictability are imperatives to the experience of a safe environment.  The nature of radioactive decay does not support this.

Therefore, the  nature of radioactive decay does not support the given statement.

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The finest website for you may rely on your individual requirements and interests. There are several websites that provide O level chemistry notes.

For students seeking free access to top-notch online resources for basic, organic, inorganic, and physical chemistry notes, check ChemistNotes.com. You can get all of the Organic & Inorganic Chemistry Notes, from basic notes to advanced level notes, in one location.

An efficient and successful technique to take notes for the sciences is to use the Cornell Note-taking System. Your paper should be divided into two columns in general. You can easily review for tests using this technique, keep your notes organised, and swiftly sum up a lecture.

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The final Pressure at 150.0°C will be 5.05 atm

Initial temperature is given as 20.0°C and final temperature is given as 150.0°c

Initial Pressure is given as 3.50 atm

First, we will convert the temperature into kelvin

20.0°C + 273.15 = 293.15 K

150.0°C + 273.15 = 423.15 K

Now, we will use the ideal gas law formula

Since the volume is constant, the formula will be

\(\frac{T_{1} }{P_{1} }\) = \(\frac{T_{2} }{P_{2} }\), where T₁ = 293.15 K, T₂ = 423.15 K, P₁ = 3.50 atm, P₂=?

Putting the values in the formula,

P₂ = \(\frac{3.50*423.15}{293.15}\) = 5.05 atm

So, the final pressure at the given temperature will be 5.05 atm

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Answer:

gases is 2

particles are 3

and the 3rd question is 1

Explanation:

Bernoulli's principle states that gas is a tiny particle that is not visible to the eyes, but particles move when displaced by some factors. Thus, the correct matches are a. 2, b. 3, and c. 1.

Bernoulli's principle states the kinetic molecular theory of gases. According to the theory, gas particles are small and are far away from each other. But they move from their position due to the fluid dynamics when objects pass through them. Hence, option a. 2 is correct.

Democritus stated about the matter is made of various constituents particles. He is known as the "Father of science" as gave the idea of matter comprising atoms. Hence, option c. 1 is correct.

Joseph Priestley proposed about the new substance formed by breaking or creating the bonds between the reactants. According to him, gases are made of particles that can be a mixture. Hence, option b. 3 is correct.

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Answer:

12 and 20 moles ratios, respectively.

Explanation:

Note that the number of mole ratios you can write for a chemical reaction involving a total of n substances is (n)(n–1). Thus, for reactions involving four and five substances, you can write 12 and 20 moles ratios, respectively.

*** HOPE IT HELPS! :)

If a hydrocarbon has eight carbon atoms, two double bonds, and one ring then the number of hydrogen atoms in this molecule will be 14.

Hydrocarbons are compounds comprised mainly of carbon and hydrogen and they are by far the dominant components of crude oil, processed petroleum hydrocarbons like gasoline, diesel, kerosene, fuel oil, and lubricating oil, coal tar, creosote, dyestuff, and pyrolysis waste products. and many other compounds as well.

An unsaturated hydrocarbon is a type of hydrocarbon which has at least one double bond, triple bond, or also ring in its carbon chain. These molecules will therefore have fewer hydrogen atoms than the parent carbon chain could possibly hold when all bonds were single bonds.

In the above given question, it says that there are eight carbon atom and it has a ring as well, so 6 carbons will form a cyclohexane and the other 2 will be substituents. Along with these there are 2 double bonds as well so now when we calculate the number of hydrogen atoms it comes out to be 14 in number.

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Most hydrocarbons in the atmosphere in rural areas arise from evaporation of gasoline. The correct answer is option (B).

While automobiles and industrial emissions can contribute to hydrocarbons in the atmosphere, studies have shown that in rural areas, the largest contributor is typically the evaporation of gasoline from fuel storage and use.Evaporation of gasoline is a significant source of hydrocarbon emissions in rural areas. Gasoline contains volatile hydrocarbons that can evaporate into the atmosphere, especially during refueling, storage, and other handling processes. This process releases hydrocarbons such as volatile organic compounds (VOCs) into the air.

Additionally, agricultural activities in rural areas can also contribute to hydrocarbon emissions. Certain agricultural practices, such as the use of certain fertilizers and livestock management, can release hydrocarbons into the atmosphere. This is due to the use of gasoline-powered equipment and vehicles, which can release hydrocarbons into the atmosphere through exhaust as well as evaporation from fuel tanks and spills. Hence option (B) is the correct answer.

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5.83ml of NaOH is needed to prepare 175 ml of 0.20 m by dilution.

Dilution is the process of “lowering the concentration of a solute in a solution by simply adding more solvent to the solution, such as water.” Diluting a solution enables adding more solvent without adding more solute.

into formula to find out the volume is ;

\(V_{1}\)\(N_{1}\) = \(V_{2}N_{2}\)

where \(V_{1}\)= ?

\(V_{2}\) = 175ml

\(N_{1}\) = 6

\(N_{2}\) = 0.2

So, ⇒ \(V_{1}\)×6 = 175×0.2

\(V_{1}\) = 5.83 ml

So, 5.83ml of NaOH is needed to prepare 175 ml of 0.20 m by dilution.

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The ΔHvap of ethyl acetate in the given conditions is 35.08 kJ/mol.

Enthalpy of vaporization:

To find the ΔHvap (enthalpy of vaporization) of ethyl acetate in kJ/mol, you can use the Clausius-Clapeyron equation, which is:

ln(P1/P2) = (ΔHvap/R) * (1/T2 - 1/T1)

Given:
Normal boiling point (T2) = 77°C = 350.15 K (converting to Kelvin by adding 273.15)
Vapor pressure at 20°C (P1) = 73 Torr
Temperature at P1 (T1) = 20°C = 293.15 K (converting to Kelvin)
P2 = 760 Torr (normal atmospheric pressure at boiling point)
R = 8.314 J/(mol*K) (universal gas constant)

First, plug the values into the equation:

ln(73/760) = (ΔHvap/8.314) * (1/350.15 - 1/293.15)

Now, solve for ΔHvap:

ΔHvap = 8.314 * (ln(73/760) / (1/350.15 - 1/293.15))

ΔHvap ≈ 35079 J/mol (rounded to the nearest whole number)

Finally, convert ΔHvap to kJ/mol:

ΔHvap ≈ 35.08 kJ/mol (rounded to two decimal places)

So, the ΔHvap of ethyl acetate is approximately 35.08 kJ/mol.

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Answer:

To dissolve an ionic compound

Explanation:

the water molecules must be able to stabilize the ions that result from breaking the ionic bond. They do this by hydrating the ions. Water is a polar molecule. ... When you place an ionic substance in water, the water molecules attract the positive and negative ions from the crystal.