The l-propanol(1)/water(2) system is found in VLE at 101.33 kPa when x1 = 0.65. The vapor phase may be assumed ideal, and the liquid phase is ruled by the Wilson equation. Find the mole fraction of water in the vapor phase and the equilibrium temperature of the system.

Ionic bonds are formed between K and Br due to losing and gaining of electrons.

Ionic bond is the bond formed between two elements due to the gaining and losing of electrons by the one member and acceptance by the other member.

Usually the metal atom loses electron and the non-metal gains electron.

Ionic bond is formed between Potassium (K) and Bromine (Br). Potassium loses electron to form  K⁺ and Bromine gains electron to form Br⁻ .

Potassium Bromide (KBr) is formed due to formation of K⁺ and Br⁻ after the addition of electron is Br and losing of electron by K atom.

Potassium Bromide can be Electrolysed into the constituent ions on addition of water due to its nature as a strong electrolyte.

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Answer:

as per given balanced equation one mole Zn produces 1mole Hydrogen

when reacted with excess acid.

So 3 moles Zn will give 3moles Hydrogen

Explanation:

According to the balanced chemical equation, one mole of Zn produces one mole of hydrogen . Therefore, 3.86 moles of Zn metal will produce 3.86 moles of hydrogen gas.

Mole ratio refers to the ratio of the number of moles of one substance in a chemical reaction to the number of moles of another substance in the same reaction.

It is derived from the balanced chemical equation for the reaction, which indicates the relative amounts of each substance involved in the reaction.

Mole ratio is important in stoichiometry, which is the study of the quantitative relationships between reactants and products in a chemical reaction.

The given chemical reaction is written as follows:

Zn + 2 HCl ⇒ ZnCl₂ + H₂

According to the balanced chemical equation, one mole of Zn produces one mole of hydrogen . Therefore, 3.86 moles of Zn metal will produce 3.86 moles of hydrogen gas.

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Answer:

2Li + ZnBr2 ->2LiBr + Zn

3Ca + Al2O3 ->2Al + 3CaO

Explanation:

Spontaneous reactions are reactions that can happen on their own. For a spontaneous reaction to occur, a metal that is higher in the activity series must displace a metal that is lower in the activity series from its solution and not vice versa.

If we look at the two reactions selected in the answer, lithium is above zinc in the activity series and calcium is above aluminum in the activity series hence the two reactions occur spontaneously.

Pressure of the gas in torr is 3575.77 when 2.0 moles of hydrogen gas are present in a container of 10.4 L at room temperature.

What is pressure in terms of gas ?

The average linear momentum of a gas's moving molecules is then calculated as the gas's pressure. Gases produce pressure, or force per unit of area. In addition to torr, atmosphere, and bar, the pressure of a gas can also be stated in many additional SI units, such as pascal or kilopascal.

Given :

Moles of hydrogen = 2.0 moles

volume of container = 10.4 L

Temperature = 25° C

Using the gas law

PV = nRT

P x 10.4 L = 2.0 moles x 0.0821 atm L/ mol k

P= 4.70 atm

P = 4.70 atm x 760 torr/ atm

P = 3575.77 torr

Thus pressure of the gas in torr is 3575.77 when 2.0 moles of hydrogen gas are present in a container of 10.4 L.

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Answer:

Molarity of HCl = 1.6M

Explanation:

The chemical reaction equation is;

HCl(aq) + NaOH(aq) —> NaCl(aq) + H2O(l)

Now, molarity = number of moles/volume

Thus, for NaOH, we have;

Number of moles = molarity × volume = 2M × (20/1000) L

Number of moles = 0.04 moles

Using the coefficients in the chemical equation above, we can find the corresponding number of moles for HCl.

Number of moles of HCl = 0.04 moles NaOH × (1 mole of HCl/1 mole of HCl) = 0.04 moles of HCl

Thus;

Molarity of HCl = 0.04/(25/1000)

Molarity of HCl = 1.6M

The symbol is the correct notation for the element silicon is Si. The atomic number of the silicon is 14. The correct option is a , b.

The silicon is a metalloid, that means it has properties of both the metals and the nonmetals. The Silicon is the second most abundant element on the Earth, after the oxygen, and it is the major component of the rocks, sand, and the minerals.

The Silicon has the crystalline structure and is vey hard, brittle, and the  blue-grey material. The silicon is not found in the pure form in the nature.

The atomic number of the silicon is 14. The symbol of the silicon is Si. Therefore, the a, b is correct option.

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Given, Manganese dioxide (MnO2) = 28gHydrochloric acid (HCl) = 42g

To find, Theoretical yield of Cl2, We will find the limiting reagent and use its mole to find the theoretical yield of Cl2.MnO2 + 4HCl → MnCl2 + 2H2O + Cl2First we will find the limiting reagent.

The number of moles of MnO2 is, Moles of MnO2 = Mass/Molar mass = 28/86.94 = 0.322 mol The number of moles of HCl is, Moles of HCl = Mass/Molar mass = 42/36.46 = 1.151 mole will use the mole ratio of MnO2 and HCl to find the mole of Cl2. The mole of HCl required to react with 0.322 mol of MnO2 = 0.322 x 4 = 1.288 mol The number of moles of Cl2 will be, Moles of Cl2 = 0.322 x 1 / 4 = 0.0805 mol. The theoretical yield of Cl2 from the given reactants is,

Theoretical yield of Cl2 = Moles x Molar mass = 0.0805 x 70.9 = 5.71 g Chlorine gas will be produced with a theoretical yield of 5.71 g when 28 g of MnO2 and 42 g of HCl are mixed.

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Answer:

No it is not a good conductor

Explanation:

Krypton is classified as a gas and nonmetal. Like many nonmetals and gases, krypton is an insulator, so it is a relatively poor conductor of heat and electricity.

Answer:

Q = -627.6 J

Explanation:

Mass, m = 15 grams

Initial temperature, \(T_i=40^{\circ} C\)

Final temperature, \(T_f=30^{\circ} C\)

We need to find the amount of heat released by this much of sample of water. We know that heat released is given by the below formula :

\(Q=mc\Delta T\)

c is specific heat of water, \(c=4.184\ J/g-K\)

\(\Delta T=T_f-T_i\\\\=(30^{\circ}-40^{\circ} )\ C\\\\=-10^{\circ} C\\\\=-10\ K\)

So,

\(Q=15\times 4.184\times -10\\\\Q=-627.6\ J\)

Hence, 627.6 J of heat is released and negative sign shows that energy is being given off.

The hydrochloric acid stock solution has a 15.2472 M concentration.

The chemical formula of hydrochloric acid is H+Cl-, making it a potent acid. It quickly releases hydrogen ions in aqueous solutions and, depending on concentration, has a pH ranging from -0.5 to -1.1.

We can use the dilution equation to calculate the hydrochloric acid stock solution's concentration:

C1V1 = C2V2

where C2 is the concentration of the diluted solution, V2 is the total volume of the diluted solution, V1 is the volume of the stock solution utilized, and C1 is the concentration of the stock solution.

What we have here is

C1 x 25.50 mL = 0.86 M x 450.80 mL

For C1, we solve as follows:

C1 = 0.86 M x 450.80 mL / 25.50 mL

C1 = 15.2472 M

Therefore, 15.2472 M of hydrochloric acid is present in the stock solution.

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The heat released by reaction : C) -8870 J

Given

1.008 g of hydrogen

500.00 g water

The temperature rises 25.00 °C to 29.24 °C

Required

energy required

Solution

Q absorbed by water :

Q = m.c.Δt

Q = 500 g x 4.18 J/g C x (29.24-25)

Q = 8870.08 J

The reaction to produce HCl is an exothermic reaction (releasing heat), so that Q is negative

Q water = -Q HCl = -8870.08 J

A diprotic weak acid is an acid that has two replaceable hydrogen atoms. The acid will then undergo two dissociations to produce two hydrogen ions. As a result, the acid's reaction with bases is more complex, and it is dependent on the concentration of acid and pH.

A diprotic weak acid is an acid that has two replaceable hydrogen atoms. The acid will then undergo two dissociations to produce two hydrogen ions. As a result, the acid's reaction with bases is more complex, and it is dependent on the concentration of acid and pH. When titrated, the following data must be considered: the concentration of the acid, the concentration of the base, and the pKa values of the acid. The equivalent point is the point in titration where the number of moles of acid is equal to the number of moles of base added to it. In a titration curve, the first equivalence point is determined by the point where the initial amount of diprotic acid is neutralized. It's the point where the base added to the acid neutralizes all the H+ present in the solution.

The amount of strong base required to reach the first equivalence point can be calculated as follows: As per the equation, 1 mole of diprotic acid releases two moles of hydrogen ions, which means that to neutralize one mole of acid, you will require two moles of strong base. Therefore, you would require two moles of strong base to reach the first equivalence point in a titration curve. The pKa of the second titratable hydrogen would be equal to the pH at the halfway point between the two equivalent points. As a result, the amount of strong base required to reach the pH equivalent to the pKa of the second titratable hydrogen is also equal to the amount required to achieve the halfway point between the two equivalence points.

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50 g of sodium nitrate will precipitate out of the solution when it is cooled from 50°C to 20°C.

When a solution is saturated, it means that it contains the maximum amount of solute that can dissolve in the solvent at a particular temperature. If the temperature of the solution is lowered, the solubility of the solute decreases and some of it will start to precipitate out of the solution.

In this problem, we are given a solution of sodium nitrate (\(\mathrm{NaNO_3}\)) in water at 50°C that is saturated. We are asked to determine how much sodium nitrate will precipitate out of the solution if it is cooled to 20°C.

To solve this problem, we need to know the solubility of sodium nitrate in water at both 50°C and 20°C. According to the solubility curve for sodium nitrate, the solubility of \(\mathrm{NaNO_3}\) in water is approximately 113 g/100 g of water at 50°C and 88 g/100 g of water at 20°C.

Since we have 200 g of water in our solution, we can use these solubility values to determine how much sodium nitrate is dissolved in the solution at 50°C and how much will precipitate out at 20°C.

At 50°C, the solution is saturated with sodium nitrate, so we can assume that it contains 113 g of \(\mathrm{NaNO_3}\) for every 100 g of water. Therefore, the total amount of \(\mathrm{NaNO_3}\) in the solution is:

\(\left(\frac{113 \textrm{ g NaNO}_3}{100 \textrm{ g H}_2\textrm{O}}\right) \times (200 \textrm{ g H}_2\textrm{O}) &= 226 \textrm{ g NaNO}_3\end{align*}\)

When we cool the solution to 20°C, the solubility of \(\mathrm{NaNO_3}\) in water decreases to 88 g/100 g of water. This means that the maximum amount of \(\mathrm{NaNO_3}\) that can remain dissolved in the solution is:

\(\left(\frac{88 \textrm{ g NaNO}_3}{100 \textrm{ g H}_2\textrm{O}}\right) \times (200 \textrm{ g H}_2\textrm{O}) &= 176 \textrm{ g NaNO}_3\)

The difference between the amount of \(\mathrm{NaNO_3}\) in the saturated solution at 50°C and the maximum amount that can remain dissolved at 20°C is the amount that will precipitate out of the solution:

\(226 \textrm{ g NaNO}_3 - 176 \textrm{ g NaNO}_3 &= 50 \textrm{ g NaNO}_3\)

Therefore, 50 g of sodium nitrate will precipitate out of the solution when it is cooled from 50°C to 20°C.

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Answer: I think it is D

Explanation:

Answer:

D

Explanation:

i took the test

The molarity of the final solution is (a) 0.16 M.

The first step in solving this problem is to calculate the total number of moles of solute present in each solution. To do this, we multiply the volume of each solution by its respective molarity.
For the 0.25 M solution, we have:
(40.0 mL) x (0.25 mol/L) = 10.0 mmol
For the 0.12 M solution, we have:
(85.0 mL) x (0.12 mol/L) = 10.2 mmol
Next, we add the two amounts of moles together to get the total number of moles in the final solution:
10.0 mmol + 10.2 mmol = 20.2 mmol
Finally, we divide the total number of moles by the total volume of the solution (which is the sum of the volumes of the two solutions) to get the molarity of the final solution:
(40.0 mL + 85.0 mL) = 125.0 mL = 0.125 L
Molarity = (20.2 mmol) / (0.125 L) = 0.16 M
Therefore, the answer is (a) 0.16 M.
Note that we did not need to know the molar mass of the solute to solve this problem.

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Answer:

Geologic carbon sequestration is the process of storing carbon dioxide (CO2) in underground geologic formations. The CO2 is usually pressurized until it becomes a liquid, and then it is injected into porous rock formations in geologic basins. This method of carbon storage is also sometimes a part of enhanced oil recovery, otherwise known as tertiary recovery, because it is typically used later in the life of a producing oil well. In enhanced oil recovery, the liquid CO2 is injected into the oil-bearing formation in order to reduce the viscosity of the oil and allow it to flow more easily to the oil well.

Biologic carbon sequestration refers to storage of atmospheric carbon in vegetation, soils, woody products, and aquatic environments. For example, by encouraging the growth of plants—particularly larger plants like trees—advocates of biologic sequestration hope to help remove CO2 from the atmosphere.

Hope this helped!

Answer:

2Na + 2H2O ----> 2NaOH + H2

Explanation:

Answer: the answer is A

Explanation:

P-aminobenzoic acid is an organic compound with the chemical formula C₇H₇NO₂. When sulfuric acid (H₂SO₄) is added to a solution of p-aminobenzoic acid, it can cause the precipitation of the compound.

This is due to a chemical reaction that occurs between the acid and the amino group (-NH₂) on the benzene ring of the p-aminobenzoic acid. Sulfuric acid is a strong acid that can donate protons (H⁺) to other molecules, such as p-aminobenzoic acid.  When it is added to a solution of p-aminobenzoic acid, the sulfuric acid reacts with the amino group to form an ammonium sulfate salt, which is not soluble in water.

The ammonium sulfate salt then precipitates out of solution as a solid, causing the p-aminobenzoic acid to also precipitate out.The reaction between p-aminobenzoic acid and sulfuric acid is an example of a salt formation reaction.  This type of reaction involves the combination of an acid and a base to form a salt and water. In this case, the amino group on the p-aminobenzoic acid acts as the base, while the sulfuric acid acts as the acid.

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Answer: Ionic attractions

Explanation:

Ionic bonding is a type of chemical bond that involves the electrostatic attraction between oppositely charged ions.

Answer:

Magnesium Chloride is used as a precursor magnesium metals.

Explanation:

The plastic container is likely to impact the integrity of the evidence i.e. a sample of DNA based on this storage method.

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Ca²⁺ion has a lower ratio of charge to volume.

The charge density of an ion is defined as the ratio of the charge of an ion to its volume. Scandium ion has high charge density than calcium ions. The charge density of an ion is defined as the ratio of the charge of an ion to its volume.

Charge density also depends on the size of the ion and valence electrons. The volume of an ion increases with its size. It is inversely proportional to ion volume and directly proportional to charge magnitude. Scandium and calcium are IV periodic elements with atomic numbers of 21 and 20 respectively. Scandium loses three electrons and has a +3 charge and calcium is a divalent cation. Hence, the Scandium ion has high charge density than the calcium ion.

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The theoretical yield of isopentyl acetate is equal to the moles of the limiting reactant because it is assumed that all of the limiting reactant is consumed and converted to the product.

The theoretical yield of isopentyl acetate is 0.0496 moles.

To calculate the theoretical yield of isopentyl acetate (product), we need to determine the limiting reactant in the esterification reaction. This can be done by comparing the molar ratios of the reactants and their respective molar masses.

First, let's convert the quantities of acetic acid and isopentyl alcohol to moles.

Moles of isopentyl alcohol = mass of isopentyl alcohol / molar mass of isopentyl alcohol

= 4.37 g / 88.15 g/mol

= 0.0496 mol

Next, we need to convert the quantity of acetic acid from milliliters (mL) to grams (g). Since the density of acetic acid is not provided, we'll assume it to be approximately 1.05 g/mL, which is close to the density of acetic acid at room temperature.

Mass of acetic acid = volume of acetic acid × density of acetic acid

= 8.5 mL × 1.05 g/mL

= 8.925 g

Moles of acetic acid = mass of acetic acid / molar mass of acetic acid

= 8.925 g / 60.05 g/mol

= 0.1486 mol

Now, we can compare the moles of each reactant to determine the limiting reactant.

From the balanced chemical equation for the esterification reaction:

1 mole of isopentyl alcohol reacts with 1 mole of acetic acid to produce 1 mole of isopentyl acetate.

Since the mole ratio is 1 ratio 1, the reactant with the smaller number of moles is the limiting reactant. In this case, isopentyl alcohol has 0.0496 moles, and acetic acid has 0.1486 moles. Therefore, isopentyl alcohol is the limiting reactant.

The theoretical yield of isopentyl acetate is equal to the moles of the limiting reactant because it is assumed that all of the limiting reactant is consumed and converted to the product.

Therefore, the theoretical yield of isopentyl acetate is 0.0496 moles.

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You can fill in the table for other elements and their respective isotopes by determining the appropriate number of protons, neutrons, and electrons based on the given isotope mass number and atomic number.

To accurately fill in the table with the correct number of subatomic particles for the elements given the isotope mass number, we need to consider the composition of atoms and their respective subatomic particles. Atoms are composed of protons, neutrons, and electrons.

The number of protons in an atom is equivalent to its atomic number, which uniquely identifies the element. The number of neutrons can be determined by subtracting the atomic number from the isotope mass number. Electrons in a neutral atom are equal to the number of protons.

Let's take an example using the isotope mass number:

Isotope: Carbon-14 (mass number = 14)

Element: Carbon (atomic number = 6)Based on the atomic number and isotope mass number, we can determine the number of subatomic particles as follows:

Protons: 6 (same as the atomic number)

Neutrons: 14 - 6 = 8

Electrons: 6 (same as the number of protons in a neutral atom)

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The mass of ether that can be put into a 130 mL beaker is approximately 92.3 grams.

To calculate the mass of ether that can be put into a 130 mL beaker, we need to know the density of ether.

The density of ether varies depending on the specific type of ether, but assuming you are referring to diethyl ether, the density is approximately 0.71 g/mL.

Using the density and the volume of the beaker, we can calculate the maximum mass of ether that can be put into the beaker as follows:

Mass of ether = Density x Volume

Mass of ether = 0.71 g/mL x 130 mL

Mass of ether = 92.3 grams

Therefore, the maximum mass of diethyl ether that can be put into a 130 mL beaker is approximately 92.3 grams.

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To analyze the world around us on a daily basis, we must employ the use of technology that allow the collection of huge amounts of data as well as their analysis.

To evaluate the environment around us on a daily basis, we must preserve a record of facts about the occurrences we want to Analyze. As a result, we can follow any changes and make educated decisions about them.

One might choose to monitor the pace of change in forest size on a global basis. This is now possible thanks to satellites and other research organizations. One might also choose to monitor health data on a worldwide basis.

Other considerations include:

It should be noted that the analysis of world data emphasizes world systems, not national states, it is important to take into account historical processes that take place over a long period of time, and the integration of a traditionally diverse body of knowledge, such as history, political science, economics. and sociology in one analytical framework.

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