Part A
Determine the value of Kp for the following reaction:
4HCl(g)+O2(g)⇌2Cl2(g)+2H2O(g)
Express the equilibrium constant to three significant digits.
Part B
Determine the value of Kp for the following reaction:
Cl2(g)+H2O(g)⇌2HCl(g)+1/2O2(g)
Express the equilibrium constant to three significant digits.
Part C
What is the value of Kc for the reaction in Part B?
Express the equilibrium constant to three significant digits.

Answer:

Explanation:

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The balanced chemical equation for the reaction of solid carbon with oxygen gas to form carbon monoxide gas is  2 C + O₂\(\rightarrow\) 2 CO.

Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.

A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .

The first chemical equation was put forth by Jean Beguin in 1615.By making use of chemical equations the direction of reaction ,state of reactants and products can be stated. In the chemical equations even the temperature to be maintained and catalyst can be mentioned.

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Answer:

Calcium

Explanation:

The number of protons is the atomic number of the element. Number 20 on the periodic table is Calcium.

Answer:

The answer is B

Explanation:

Answer:

Hello!

Your answer is B) Ca(HCO3)2!!

Explanation:

Hope this helps you!!

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Extrusion is the feature form at Earth's surface from the cooling of lava.

They are the ones that originate from a sudden cooling of the incandescent magma when it comes to the surface, which means that there is no time for crystals to form, either partially or totally.

Therefore, we can conclude that typical volcanic rocks are formed by the rapid cooling of lava and pyroclastic fragments.

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Answer:

A.

Explanation:

Because it requires more energy to create a neutron from a proton than it does to create a proton from a neutron, protons were formed more frequently than neutrons in the early universe. The correct answer is option b.

To find the answer, we need to know more about the early universe.

Thus, we can conclude that, the correct answer is option b.

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In a General Chemistry lab, the calibration plot that is not typical is "electrical conductivity vs concentration".

So, the correct answer is D.

A calibration plot is a graph of a known quantity that is used to determine an unknown quantity.

In this case, a series of solutions is used to plot a standard curve that can then be used to find parameters about an unknown. In the experiments conducted in this course, absorbance vs concentration was plotted, which is a common calibration plot used in chemistry.

Other examples of calibration plots include precipitating mass vs amount of titrant added, intensity of color vs concentration, and concentration vs volume of vessel.

Electrical conductivity vs concentration is not typically used because it is not a reliable method for determining concentration.

Hence, the answer of the question is D.

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The ideal gas law, which relates the pressure, volume, temperature, and number of moles of an ideal gas, can be applied to real-world situations. By considering a specific scenario and applying the ideal gas law, we can analyze the behavior of gases and make predictions about their properties.

Let's consider a situation where a scuba diver is exploring underwater at a depth of 30 meters. We can apply the ideal gas law, specifically the form known as Boyle's law, which states that the pressure and volume of a gas are inversely proportional at constant temperature.

Question: How does the pressure of the gas in the scuba tank change as the diver descends to a depth of 30 meters, assuming the temperature remains constant?

To answer this question, we can use the ideal gas law equation PV = nRT, where P is the pressure, V is the volume, n is the number of moles of gas, R is the ideal gas constant, and T is the temperature. By keeping the temperature constant, we can observe the relationship between pressure and volume as the diver descends and calculate the change in pressure based on the change in volume.

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A type of biotechnology called artificial selection is deliberately breeding plants or animals to promote or eliminate specific desirable qualities. Crops may be carefully bred by farmers, for instance, to increase their resistance to pests or drought.

Artificial selection is a type of biotechnology that involves selectively breeding plants or animals to enhance or suppress certain desirable traits.

For example, farmers may selectively breed crops to make them resistant to pests or droughts.

One benefit of artificial selection for individuals is that it can lead to higher crop yields, which can result in increased profits for farmers. However, one risk of artificial selection for individuals is that it can lead to the loss of genetic diversity in crops, which can make them more vulnerable to disease outbreaks.

One benefit for society is that artificial selection can help to alleviate hunger and food shortages by producing more food. However, one risk for society is that artificial selection can lead to the creation of monocultures, which are vulnerable to pests and disease outbreaks.

One benefit for the environment is that artificial selection can lead to the production of crops that require fewer pesticides and herbicides, which can reduce pollution. However, one risk for the environment is that artificial selection can lead to the loss of biodiversity, which can negatively impact ecosystems.

Attached is an image of a farmer selectively breeding crops.

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Answer:

a) 0.154 moles of N2

b) 9.27 × 10^22 molecules

c) 4.312 g

Explanation:

a)

1 mole of N2 contains 6.02 × 10^23 atoms

x moles of N2 contains 9.26 × 10^22 atoms

x= 9.26 ×10^22/6.02 × 10^23

x= 1.54 ×10^-1

x= 0.154 moles of N2

b)

1 mole of N2 contains 6.02 × 10^23 molecules

0.154 moles of N2 contains 0.154 moles × 6.02 × 10^23 = 9.27 × 10^22 molecules

c)

Molar mass of the nitrogen gas= 28 gmol^-1

Number of moles of nitrogen gas = 0.154 moles

Number of moles = mass/molar mass

0.154 moles= mass/28 gmol^-1

Mass= 0.154 moles × 28gmol^-1

Mass= 4.312 g

Two possible sources of systematic (determinate) error in the experiment are; Incorrect calibration of volumetric glasswareIncorrect mass of NaCl

To calculate the concentration of NaCl in the resulting solution in mg/L NaCl, we can use the formula; Concentration (mg/L) = (Mass of solute ÷ Volume of solution in L) × 1000 g / 1 mg NaCl is present in the stock solution of 25 mL. So, the mass of NaCl in the solution would be;0.0842 g ÷ 25 mL = 0.00337 g/mL. Now, in the resulting solution, a 1.00 mL aliquot of the stock solution is transferred to a 50.00 mL volumetric flask and diluted to volume. Therefore, the volume of the resulting solution is 50.00 mL. We will substitute these values in the formula, Concentration (mg/L) = (0.00337 g/mL ÷ 50 mL) × 1000 g / 1 mg concentration (mg/L) = 67.4 mg/L. Therefore, the concentration of NaCl in the resulting solution in mg/L NaCl is 67.4 mg/L.7.  Concentration = 67.4 mg/LTolerance = 4.28 mg/LTotal concentration = 67.4 + 4.28 mg/L = 71.68 mg/LWe round off this value to one decimal place; Total concentration = 71.7 mg/LTherefore, the concentration of NaCl in the resulting solution using propagation of error through the calculation is 67.4+0.4 mg/L.8. Two possible sources of random (indeterminate) error in the experiment are; Errors in temperature measurement. Errors in measurement of water volume. Two possible sources of systematic (determinate) error in the experiment are; Incorrect calibration of volumetric glasswareIncorrect mass of NaCl.

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The percent yield of a reaction is a measure of how efficiently the reaction proceeds, calculated by comparing the actual yield to the theoretical yield. In this case, the reaction involves 16.66 g of phosphorus (P4) and excess chlorine (Cl2), resulting in the production of 54.8 g of phosphorus trichloride (PCl3). To calculate the percent yield, we need to determine the theoretical yield first.  The percent yield for the reaction is approximately 74.3%.

The molar mass of P4 is 123.88 g/mol, while the molar mass of PCl3 is 137.33 g/mol. Based on the balanced chemical equation, 1 mol of P4 reacts with 6 mol of Cl2 to produce 4 mol of PCl3. Therefore, the molar ratio between P4 and PCl3 is 1:4.

To calculate the theoretical yield, we convert the given mass of P4 into moles using its molar mass:

16.66 g P4 * (1 mol P4 / 123.88 g P4) = 0.1343 mol P4

Using the molar ratio, we can determine the moles of PCl3 that should be produced:

0.1343 mol P4 * (4 mol PCl3 / 1 mol P4) = 0.5372 mol PCl3

Finally, we convert the moles of PCl3 into grams using its molar mass:

0.5372 mol PCl3 * (137.33 g PCl3 / 1 mol PCl3) = 73.84 g PCl3

The theoretical yield of PCl3 is calculated to be 73.84 g. To determine the percent yield, we divide the actual yield (54.8 g) by the theoretical yield (73.84 g) and multiply by 100:

Percent Yield = (54.8 g / 73.84 g) * 100 = 74.3%

Therefore, the percent yield for the reaction is approximately 74.3%. This value indicates that the reaction produced 74.3% of the expected amount of PCl3 based on the given amount of P4. The lower percent yield suggests that there may have been some inefficiencies or losses during the reaction, resulting in a reduced yield of the desired product.

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The percent by mass of acetic acid in the vinegar is 2.33%.

Below are the steps to solve the given problem using the data table given below:

Step 1: Calculate the mass of the vinegar. Given,Mass of flask and vinegar solution- 25.17gMass of flask- 15.12gMass of vinegar solution = Mass of flask and vinegar solution - Mass of flask= 25.17 g - 15.12 g= 10.05 g

Step 2: Calculate the moles of NaOH used in the titration.Molarity of NaOH solution is 0.1 M.Moles of NaOH = Molarity × Volume of NaOH usedMoles of NaOH = 0.1 M × 39.00 mL (since the initial volume of NaOH is 0.00 mL)Moles of NaOH = 0.0039 moles

Step 3: Determine the moles of acetic acid used in the reaction.The balanced chemical equation for the reaction between NaOH and acetic acid (the main component of vinegar) is given below:CH3COOH + NaOH → CH3COONa + H2OMoles of NaOH = Moles of CH3COOH (since they react in a 1:1 ratio)Moles of CH3COOH = 0.0039 moles

Step 4: Calculate the mass of acetic acid used in the reaction.Molar mass of acetic acid is 60.05 g/mol.Mass of CH3COOH = Moles of CH3COOH × Molar mass of CH3COOH= 0.0039 moles × 60.05 g/mol= 0.234 gStep 5: Calculate the percent by mass of acetic acid in the vinegar.Percent by mass of acetic acid = (Mass of CH3COOH / Mass of vinegar solution) × 100%= (0.234 g / 10.05 g) × 100%= 2.33%.

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The energy of a photon with a wavelength of 21 nm can be calculated using the equation E = hc/λ, where E represents the energy of the photon, h is Planck's constant (6.626 x 10^-34 J·s), c is the speed of light (3.00 x 10^8 m/s), and λ is the wavelength in meters.

To calculate the energy of the photon with a wavelength of 21 nm, we first need to convert the wavelength from nanometers to meters. There are 1 billion nanometers in a meter, so 21 nm is equal to 21 x 10^-9 meters.

Substituting the values into the equation, we have:

E = (6.626 x 10^-34 J·s) * (3.00 x 10^8 m/s) / (21 x 10^-9 m)

By performing the calculation, we find that the energy of a photon with a wavelength of 21 nm is approximately 9.971 x 10^-17 Joules.

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Answer:

The charge carried by each ion (oxidation state of each atom)

Explanation:

If we have an ionic compound and we want to write its formula, we must first know the magnitude of charge on each ion (shown as oxidation state of the atoms involved) because the magnitude of charge on each ion is eventually crisscrossed and gives the subscript (number of atoms) for each atom in the formula.

For instance, let us write the formula of calcium bromide. Ca has a charge of +2 while Br has a charge of -1. If we exchange the charges and ignore the signs such that the crisscrossed charges form subscripts we can now write; \(CaBr_{2}\).

Answer:

A siege engine is a device that is designed to break or circumvent heavy castle doors, thick city walls and other fortifications in siege warfare. Some are immobile, constructed in place to attack enemy fortifications from a distance, while others have wheels to enable advancing up to the enemy fortification.

Explanation:

Answer:

d) The moon s about 1/2 the size of Earth s diameter

Explanation:

Answer:

2 Na

Explanation:

2 Na atoms per 1 Sulfide atom

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After boiling the water, the molarity of the NaCl solution will be approximately 2.07 M.


To find the new molarity of the solution, we need to use the equation M1V1 = M2V2, where M1 is the initial molarity, V1 is the initial volume, M2 is the final molarity, and V2 is the final volume.
Given that the initial volume is 345 ml and the final volume is 250 ml, we can find V1 as follows:
M1V1 = M2V2
1.5 M x 345 ml = M2 x 250 ml
M2 = (1.5 M x 345 ml) / 250 ml
M2 = 2.07 M
Therefore, the molarity of the solution after boiling will be 2.07 M. This means that the concentration of NaCl in the solution has increased due to the removal of water through boiling.

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Beryllium with 2 valence electrons would be able to pair with Se with 6 valence electrons. Option D.

Atoms form bonds with one another based on the number of valence electrons present in their outermost shell. Electrons are either donated, received, or paired.

In order for bonds to form, the participating atoms try to assume an octet structure, In other words, each atom tries to have a completely filled outermost shell. Thus, atoms with only a few electrons in their outermost shells readily donate them while those with just a few electrons remaining to fill up their outermost shell readily accept them.

Be has 2 outermost electrons, Se has 6. Be will readily donate the 2 outermost electrons while Se will readily accept 2 electrons for completely filled shell.

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Answer:

Follow my insatagram onlypiccolo for answer  

Explanation:

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The best reaction sequence for the given transformation is BrOH → NaOEt → BHz-THE → H2O2, NaOH.

The given transformation involves converting BrOH to BHz-THE. The first step involves the substitution of the hydroxyl group with a sodium ethoxide ion, resulting in the formation of an ether linkage. This is accomplished using NaOEt as the reagent.

In the second step, the ether linkage is cleaved using borane-THF complex (BHz-THE) to yield an alkene. This reaction is regioselective, and the boron atom in the borane complex attacks the less hindered carbon atom of the ether linkage to form an intermediate that subsequently undergoes hydrolysis to yield the alkene.

Finally, the alkene is converted to the desired product using hydrogen peroxide and sodium hydroxide. This reaction is an oxidative cleavage reaction that cleaves the alkene at the double bond to yield two carbonyl compounds. The reaction is carried out under basic conditions, and the resulting products are stabilized by the formation of carboxylate ions.

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A decomposition reaction is a chemical reaction in which one reactant breaks down into two or more products.

A metathesis reaction is a chemical reaction in which the positive ions and negative ions present in the reactants appear to exchange partners.

The standard molar enthalpy for the reaction C(s) + ½ O2(g) → CO(g) is -111KJ.

Molar enthalpy is the amount of energy per mole. In light of this, the primary distinction between enthalpy and molar enthalpy is that the former refers to the total heat content of a thermodynamic system, whereas the latter refers to the total heat per mole of reactant in the system.

C(s) + O₂(g) → CO₂(g)    ΔHO = -394 kJ ----(1)

CO₂(g) → CO(g) + 1/2O₂(g)      ΔHO = +283 kJ -----(2)

Adding 1 & 2

C(s) + ½ O₂(g) → CO(g)  

ΔHO = -394 kJ + 283 kJ

ΔHO = -111KJ.

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Complete question is " Find the standard molar enthalpy for the reaction C(s) + ½ 02(g) → CO(g)

Given that

C(s) + O2(g) → CO2(g) AHO = -394 kJ

CO2(g) → CO(g) + ¹/2O2(g) AHO = +283 kJ ".

Answer:

1. In a chemical reaction, the atoms and molecules that interact with each other are called reactants. ... No new atoms are created, and no atoms are destroyed. In a chemical reaction, reactants contact each other, bonds between atoms in the reactants are broken, and atoms rearrange and form new bonds to make the products.

2. Given below are some of the examples of the chemical reactions in our daily life:

Photosynthesis.

Combustion.

Aerobic cellular respiration.

Anaerobic respiration including the process fermentation.

Metathesis reactions, for example, vinegar and baking soda.

Oxidation which includes rusting.

Digestion.

3. A chemical formula is the combination of atomic symbols that designate a particular chemical compound, or a substance with two or more different elements. ... A chemical equation shows one or more chemical compounds (reactants) being converted into different chemical species called products.

The equilibrium constant for the system at the given temperature is 1.1×10⁻⁵

Equilibrium constant for a given is defined as the concentration of the products raised to their coefficient to the concentration of the reactants raised to their coefficient

For example:

eB <=> cD

The equilibrium constant for the reaction above is given as

Ke = [D]^c / [B]^e

The equilibrium constant for the reaction reaction can be obtained as follow

Ke = [NO]² / [N₂][O₂]

Ke = [1.1×10⁻⁵]² / [6.4×10⁻³][1.7×10⁻³]

Ke = 1.1×10⁻⁵

Thus, the equilibrium constant for the reaction at the given temperature is 1.1×10⁻⁵

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Complete question

See attached photo

Answer:

5 is the answer since I did this and got it rigt

If 2 grams of water absorbs 20 calories of heat (assume not during a state change), the resulting water temperature change is - 272.975 °C .

Calculation ,

Formula used : Q = m × Cp × change in temperature

Q = m × Cp × ΔT           ( i )

Where Q is the heat supplied in calories = 20 cal ( given )

m is the mass of water in gram = 2 g  ( given )

Cp is the specific heat capacity of water  at constant pressure = 1 cal / gK ( known )

Thus , after putting the value of heat supplied in calories ,  mass of water and specific heat capacity of water in equation ( i ) we get the value of change in temperature .

1 cal / gK  = 2 g × 20 cal × ΔT

 ΔT = 1 cal / gK / 2 g × 20 cal = 0.025 K

  ΔT = 0.025 K - 273 = - 272.975 °C

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The sentence makes it clear that none of these are true.

Iodine shortage is treated or prevented using sodium iodide. Iodine is required by the body in proper development and growth. Potassium iodide may be required for people who need additional iodine or cannot acquire adequate copper from their normal diet. Your thyroid gland needs iodine to operate correctly.

A complement used in complete parenteral feeding is sodium iodide. A water-soluble ionic bond having a crystal lattice is sodium iodide. Iodine can be obtained from sodium iodide, which can be given as a supplement for complete parenteral nutrition but is most frequently utilized in

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The number of moles in container 2 is 33.3moles when the container has 27.32L of gas inside it

The number of moles of gas in container 2 can be calculated using the Ideal Gas Law:  

n = PV/RT  

where n is the number of moles of the gas with known volume,

P is the pressure (assumed to be 1 atm for ideal gases),

V is the volume (27.32 liters),

R is the ideal gas constant (0.0821 L·atm/mol·K) and

T is the temperature (assumed to be 273.15 K).  

Plugging in the values, we get:  

n = (1 atm)(27.32 L)/(0.0821 L·atm/mol·K)(273.15 K)

n = 33.3 mol  

Therefore, there are 33.3 moles of gas in container 2.

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Depending on the element's atomic number, fusion provides significantly more energy for lighter elements than fission does for heavier ones.

The term "binding energy" is the key to comprehending this. The combined mass of protons and neutrons in a nucleus, when they are held together by the strong force, is always less than the combined mass of the same number of unbound protons and neutrons.

The mass disparity is transformed into energy when two light nuclei combine to form a heavier nucleus. This means that to cause the nucleus to disintegrate, the same amount of energy must be added.

The issue is that a lot of energy is released when hydrogen and helium are fused together. Less energy is released when heavier elements are fused.

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