For the reaction:
ABC +D <---> AB+CD
Hrxn=-35kJ/mol and Ea(fwd)=255kJ/mol
Assuming a one step reaction Calculate Ea(rev)? In kJ/mol

Answer:

Atoms are mostly empty space.

Answer:

Auric chloride

Explanation:

took the test

Answer:

42. The statement is "The value of ΔH° for the overall reaction is large and negative".

43. The value of the enthalpy change is -93kJ.

Explanation:

42. The Kp depends on the ΔH° as both are related by ΔG formula, so the statement that identifies the reason of Kp value is "The value of ΔH° for the overall reaction is large and negative".

If ΔH° is negative, then the calculation of Kp will be a large number, because the formula of Kp is:

43. To calculate the value of the enthalpy change per mole of HCl produced, it is necessary to write the whole final reaction from the reactions in steps 1, 2 and 3 (multiplying or dividing the enrgies, just like the equations). Then, we have to sum all the final energies:

In this case, it is not necessary to multiply or divide the equations, because each H cancels, and each Cl cancels as well.

-186 kJ is the enthalpy change for the whole reaction, where 2 moles of HCl are produced. So, to calculate the enthalpy change for 1 mole of HCl, we have to divide it by 2.

Finally, the value of the enthalpy change is -93kJ.

The best reagent and conditions from each list :

1) AlCl₃ - CH₃Cl at room temperature

2) HNO₃ -H₂SO₄ at room temperature

3) Fuming HNO₃ -H₂SO₄ at 90-100 ⁰C heat .

Benzene will be converted to the toluene by the Friedel Craft Alkylation of the benzene . In this reaction the reagent AlCl₃ and the CH₃Cl is used .

Dinitritoluene will be prepared from the toluene by the Nitration . The reaction is uses the Electrophilic substitution mechanism . The reagents that used are HNO₃ and the H₂SO₄ at room temperature.

This reaction is the extended nitration of the toluene . The Further nitration is done in the extreme condition . The temperature of the reaction is increased to the 90- 100 ⁰ C.

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The statement which have correct evidence supporting above is that electrical energy can be changed or converted into other form of energy.

Therefore, Option A is the correct option.

Electrical energy is defined as the energy which is derived from electric kinetic energy or potential energy of the charged particles.

In general, it is referred as the amount of energy which has been changed from electric potential energy. We can also define electrical energy as the energy which is generated by the movement of electrons from one position to another position. The movement of charged particles or electron through/along a medium which constitute current or electricity.

The SI unit of Electrical Energy is watt-second.

The commercial unit of Electrical energy is kilowatt-hour.

1Kwh = 3.6 × 10^6 J.

Some example of Conversion of Electrical energy are as follow:

Fan - The electrical energy is converted into mechanical energy and heat energy.

Therefore, the electrical energy in light bulb is converted into light energy and heat energy.

Thus, we concluded that the electrical energy can be changed or converted into other form of energy.

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Answer: 55.85 c

Explanation:

Answer:

55.85°C

Explanation:

Temp Conversion: K - 273.15 = °C

Step 1: Define variables

K = 329 K

°C = ?

Step 2: Substitute and Evaluate for °C

329K - 273.15 = °C

55.85°C

Type of reinforcement schedule is Variable-ratio.

A type of operant conditioning called a variable-ratio reinforcement schedule gives rewards after a varied number of answers. It has been discovered that this schedule, which is frequently utilised in gambling, is most efficient at generating the strongest and most resistant behaviour. The best response rates and greatest resistance to extinction are produced by variable-ratio regimens. This happens because the subject exhibits persistent behaviour for prolonged lengths of time since they are unsure of when they will receive reinforcement. A person learns more quickly and effectively when the reward is unpredictable since it keeps them motivated and interested.

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Answer:

Now, to know the percent composition of Carbon and Oxygen .We will divide their weight with the total weight of CO2. % C = 12.01/44.01 = 0.2729= 27.29% (we will divide 0.2729 with 100 to take the percentage). So , % C in CO2 is 27.29% % O = 32.00/44.01 =0.7271 =72.71 %O in CO2. If playback doesn't begin shortly, try restarting your device.

Explanation:

Answer:

first balance the equation:

2SO2+O2=2SO3. BALANCED EQUATION

find the ratio:

2:1:2. SO2:O2:SO3

5.0 moles of SO2 React

1/2×5.0 moles=2.5moles of O2 are needed

The 1.8 moles of the oxygen (O₂) gas are required to react with 3.6 mol SO₂(g).

A chemical equation is a way to represent a chemical reaction in terms of chemical symbols of the reactants and products. The equation in which the number of atoms of chemical substances (reactants and products) is equal on either side of the equation is known as a balanced chemical equation.

Balancing of a chemical equation must follow the law of conservation of mass. The total mass of the elements present on the reactant side must be equal to the total mass of elements present on the product side while obeying this law in a balanced chemical equation.

Given, the chemical equation of the formation of sulphur trioxide is:

2SO₂(g)  + O₂(g)  →  2SO₃(g)

From the above equation, we can say that the two moles of sulphur dioxide react with one mole of oxygen gas to form two moles of sulphur trioxide gas.

3.6 moles of the SO₂(g) react with moles of oxygen gas = 3.6/2 = 1.8 mol

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Answer: False

Explanation: Gaining an electron which has a negative charge results in an overall negative charge, thus making this an anion, and the answer, false.

Answer:false

Explanation:it becomes a anion

Answer:

letter D.

Explanation:

it shows a pattern for determining the side of lengths of a triangle yeah the triangle had a model and a length

Answer:

The answer is Clay or C!!!

Explanation:

Brainliest Please!!!!!!!!!

The molecule H₁₂O₆ does not exist in nature. The formula H₁₂O₆ suggests the presence of 12 hydrogen atoms and 6 oxygen atoms.

However, such a configuration is highly unstable and does not conform to the principles of chemical bonding and stability. In a typical molecule of water (H₂O), two hydrogen atoms are bonded to one oxygen atom. The Lewis structure for water would represent this bonding arrangement. Each hydrogen atom contributes one valence electron, and oxygen contributes six valence electrons.

The Lewis structure for water would show two lines (representing covalent bonds) connecting the oxygen atom to each hydrogen atom. Additionally, the oxygen atom would have two lone pairs of electrons (represented by dots) surrounding it. It is important to note that the Lewis structure represents the valence electron arrangement in a molecule and provides insight into its bonding and geometry.

However, the Lewis structure alone may not capture the full 3D shape and molecular properties. In the case of H₁₂O₆, the presence of 12 hydrogen atoms and 6 oxygen atoms is highly unlikely due to the unfavorable electron configuration and excessive charge repulsion.

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Answer:That's 25.8 g of calcium carbonate In 100 g of the sample.

Explanation:

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The component that will limit the reaction is:

a. HCl (Hydrochloric acid)

To determine the limiting reagent in the given chemical reaction, we need to compare the moles of each reactant to the stoichiometric ratio of the balanced equation.

Let's calculate the number of moles for each reactant:

For Zn:

Molar mass of Zn = 65.38 g/mol

Number of moles of Zn = mass / molar mass = 3.27 g / 65.38 g/mol ≈ 0.05 mol

For HCl:

Molar mass of HCl = 36.46 g/mol

Number of moles of HCl = mass / molar mass = 3.30 g / 36.46 g/mol ≈ 0.09 mol

According to the balanced equation, the stoichiometric ratio between Zn and HCl is 1:2. This means that for every 1 mole of Zn, we need 2 moles of HCl.

In this case, the number of moles of Zn (0.05 mol) is less than half of the number of moles of HCl (0.09 mol). Therefore, Zn is the limiting reagent, as it will be completely consumed before all the HCl can react.

So, the component that will limit the reaction is:

a. HCl (Hydrochloric acid)

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Edible mushrooms: Consuming edible mushrooms is safe and provides health advantages like fiber, vitamins, and minerals.

Non-Edible mushrooms: Mushrooms that cannot be eaten could be harmful or have unappealing flavors and textures that could be harmful if consumed.

The Combined Gas Law, which emphasizes the following, can be used to address the issue:

(P₁ * V₁) / T₁ = (P₂ * V₂) / T₂

Where:

P₁ = Initial pressure

V₁ = Initial volume (unknown in this case)

T₁ = Initial temperature

P₂ = Final pressure

V₂ = Final volume

T₂ = Final temperature

Let's plug in the given values:

P₁ = 60.0 atm

V₁ = unknown

T₁ = 115K

P₂ = 30.0 atm

V₂ = 29 liters

T₂ = 225K

We can rearrange the combined gas law equation to solve for V1 as follows:

V₁ = (P₁ * V₂ * T₁) / (P₂ * T₂)

Plugging in the values:

V₁ = (60.0 atm * 29 L * 115K) / (30.0 atm * 225K)

Simplifying the equation:

V₁ = (60.0 * 29 * 115) / (30.0 * 225)

V₁ ≈ 57.7 liters

Therefore, you initially started with approximately 57.7 liters of gas.

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The concentration of salt in the tank when water starts to overflow is 12 grams per gallon.

To find the concentration of salt in the tank when water starts to overflow, we need to determine the amount of salt in the tank at that point and divide it by the total volume of water.

First, let's calculate the amount of salt that flows into the tank per minute:
8 grams of salt per gallon * 3 gallons per minute = 24 grams of salt per minute.

Next, let's calculate the amount of water that flows out of the tank per minute:
2 gallons per minute.

The net change in the volume of water in the tank per minute is:
3 gallons per minute - 2 gallons per minute = 1 gallon per minute.

Since the initial volume of water in the tank is 50 gallons and the net change in volume is 1 gallon per minute, the time it takes for the water to overflow is:
(100 gallons - 50 gallons) / 1 gallon per minute = 50 minutes.

Therefore, after 50 minutes, the tank will overflow.

To find the concentration of salt in the tank at that point, we need to calculate the total amount of salt in the tank after 50 minutes:
24 grams per minute * 50 minutes = 1200 grams.

The total volume of water in the tank is 100 gallons, and since the tank overflows after 50 minutes, the amount of water in the tank is 100 gallons.

Therefore, the concentration of salt in the tank when water starts to overflow is:
1200 grams / 100 gallons = 12 grams per gallon.

So, the concentration of salt in the tank when water starts to overflow is 12 grams per gallon.

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Answer:

calculate the formulae mass of mgs04 (c=12, fe=56, mg =24,s=32,0=16

In the molecule, CH₂NOH, the hybridization states of the carbon (C), nitrogen (N), and oxygen (O) atoms can be determined based on the number of sigma bonds and lone pairs around each atom. From this, the hybridization of Carbon (C) is sp³, the hybridization of Nitrogen (N) is sp² and the hybridization of oxygen is sp³ hybridized

Carbon (C): In CH₂NOH, the carbon atom is bonded to two hydrogen atoms and one oxygen atom. It also has one lone pair of electrons. Therefore, the carbon atom is sp³ hybridized.

Nitrogen (N): The nitrogen atom in CH₂NOH is bonded to one carbon atom and has two lone pairs of electrons. Hence, the nitrogen atom is sp² hybridized.

Oxygen (O): The oxygen atom in CH₂NOH is bonded to one carbon atom and one hydrogen atom. It also has two lone pairs of electrons. Thus, the oxygen atom is sp³ hybridized.

Hence, the hybridization of all the elements is given above.

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Answer:

Ionic

Explanation:

Na is a metal and Br is a non-metal. Makes an ionic bond. Hope that helps

Answer:  A. \(0.00301J/g^0C\)

Explanation:

The quantity of heat required to raise the temperature of a substance by one degree Celsius is called the specific heat capacity.

\(Q=m\times c\times \Delta T\)

Q = Heat absorbed  = 4.56 J

m = mass of substance = 123 g

c = specific heat capacity = ?

Change in temperature ,\(\Delta T=T_f-T_i=12.32^0C\)

Putting in the values, we get:

\(4.56J=123g\times c\times 12.32^0C\)

\(c=0.00301J/g^0C\)

The specific heat of a 123 g substance that requires 4.56 J of heat in  order to increase its temperature by 12.32 °C is \(0.00301J/g^0C\)

Answer:

Percent yield = 88%

Explanation:

Given data:

Mass of C₇H₆O₃ = 200.0 g

Actual yield of aspirin = 231 g

Percent yield  = ?

Solution:

Chemical equation:

C₇H₆O₃  + C₄H₆O₃      →       C₉H₈O₄ + C₂H₄O₂

Number of  moles of aspirin:

Number of moles = mass/molar mass

Number of moles = 200.0 g/ 138.12 g/mol

Number of moles =  1.45 mol

Now we will compare the moles of aspirin with C₇H₆O₃.

                          C₇H₆O₃           :           C₉H₈O₄

                               1                 :               1

                            1.45              :             1.45

Theoretical yield of aspirin:

Mass = number of moles × molar mass

Mass = 1.45 g × 180.158 g/mol

Mass = 261.23 g

Percent yield:

Percent yield =( actual yield / theoretical yield )× 100

Percent yield =  (231 g/ 261.23 g)× 100

Percent yield = 0.88 × 100

Percent yield = 88%

Answer: The element would be Bromine (Br).

Explanation:

Elements that belong to same groups will show similar chemical properties because they have same number of valence electrons.

Flourine (F) with atomic number 9 and Chlorine (Cl) with atomic number 17 are elements which  belong to Group 17 (Halogens). They all have 7 valence electrons and thus thus they will show similar chemical properties.

Argon (Ar) has an atomic number of 18 and Krypton (Kr) has an atomic number of 36. The group 17 element that lies between them and has similar chemical properties to halogens (group 17 elements) is Bromine (Br).

Pair of each atom that has a greater electronegativity a) Ga, b) O, c) Cl, d) Br, e) Sr.

On the periodic table, electronegativity generally increases as you move from left to right across a period and decreases as you move down a group. As a result, the most electronegative elements are found on the top right of the periodic table, while the least electronegative elements are found on the bottom left.

The electrons with negative charges are drawn to the positive charge protons in the nucleus.The electronegativity / attraction will rise with the amount of protons present in the nucleus.

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The combination of ammonium chloride and sodium hydroxide will not give a precipitate. Option A

The solubility rules gives us the idea of the kind of combination of reactants that would lead to the formation of a precipitate. We can now apply that knowledge in this question.

These regulations are founded on the idea of solubility, or a substance's capacity to dissolve in a solvent, typically water.

These solubility rules provide a quick and easy way to predict the solubility of many ionic compounds in water.

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The energy movement from solid liquid to gas is always going up and moving faster. A solid is a tight definite shape where the molecules are all stuck in one place and there’s barely energy and movement. The liquid has a more free space since it does not have a definite volume energy moves around quicker. The gas phase would have energy going everywhere Becuase it doesn’t have a definite shape and volume. As temperature goes up the kinetic energy also goes up

The most stable examples of unpaired electrons are established on the atoms and ions of lanthanides and actinides.

For finding the figure of unpaired electrons, then first have to find the atomic number of the element then write the arrangement in the ground state, then according to the oxidation state deduct the number of electrons from the outside shell. So, there are 4 unpaired electrons.

One of the most important atoms with unpaired electrons is iron. However, the individual magnetic moments do not interact magnetically, like diamagnetism.

So we can conclude that  Boron has three unpaired electrons but only one is unpaired. the first two are in the 2s orbital and the third is in a p orbital.

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Answer:

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

\(volume = \frac{mass}{density} \\\)

From the question

mass = 250 g

density = 0.975 g/cm³

We have

\(density = \frac{250}{0.975} \\ = 256.410256...\)

We have the final answer as

Hope this helps you