For a saturated aqueous solution of each of the following at 20°C and 1 atm, will the solubility increase, decrease, or stay the same when the indicated change occurs?
(b) RbI(s), increase P

Fractional distillation is used for the refining of crude petroleum.

Fractional distillation is the procedure used to separate crude oil's numerous constituents.

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V2 = 2.499 2.5 L is the sample's volume when its temperature is raised to 30 °C and its pressure is lowered to 90 kilopascals.

What does the word "volume" actually mean?

The volume of an item is the space occupied inside its three-dimensional boundaries. A other word for it is the object's capacity.

What is the volume of the liquid?

The volume of liquid measured in a vessel's standard units is known as the liquid measurement. Infant milk bottle with milliliter measurement indications and juice bottle with a 1 liter capacity are two examples of vessels that have a "capacity" or "volume."

As,

Gas constant R is constant, so, Ideal gas equation can be written as,

                                        P₁ V₁ / T₁  =  P₂ V₂ / T₂

Solving for V₂,

                                          V₂  =  (P₁ × V₁ × T₂) ÷ (T₁ × P₂)

Putting Values,

                             V₂  =  (101.325 KPa × 2 L × 303 K) ÷ (273 K × 90 KPa)

                             V₂  =  61402.95 ÷ 24570

                             V₂  =  2.499 ≈ 2.5 L

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The alternative method to collect the gas and measure the volume is by a gas syringe.

What is a gas syringe?

Gas syringe is an equipment used to pump or withdraw gas from a closed container and can measure the volume of the gas produced in any chemical reaction.

The volume of the gas produced can be measured by reading the measuring scale on the gas syringe when the plunger moves in a gas syringe.

Hence, gas syringe is an alternative method to collect and measure the volume of the gas in a chemical reaction.

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There are 0,419 moles of glucose in a sample that weights 75.5g.

To calculate the amount in moles of glucose in 75.5g, we first need the molar mass of this compound. To calculate that I'll be using the following atomic mass values:

C: 12

H: 1

O: 16

To calculate the molar mass, we multiply the number of atoms by the respective atomic mass:

(6 * 12) + (12 * 1) + (6 * 16) = 180 g/mol

Since the molar mass is 180 g/mol, we know that each mol has 180 g of glucose:

1 mol glucose ---------- 180g glucose

x --------------------------- 75.5g glucose

Solving for x, we have x = 0.419 moles of glucose

Taking into account the data in the table, the binary compounds are arranged in ascending order of bond polarity as follows:

CH4 < SIC14 < SF4

When there is a significant variation in the electronegativity of the atoms, the bond is said to be polar.

If we examine the variations in electronegativity between the atoms, we find that;

C - H = 2.5 - 2.1 = 0.4

Si - CI = 3.0 - 1.8 = 1.2

S - F = 4.0 - 2.5 = 1.5

We may observe that the biggest difference in electronegativity and

The Si-CI bond has the second-highest polarity, the S-F bond has the highest polarity, and the CH bond has the lowest electronegativity difference and polarity.

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Atom which reactive is c. an atom with 8 electrons.

Atoms, which make up all kinds of matter in the world, are composed of three components known as atomic subparticles. The three components of an atom are electrons, protons, and also neutrons.

Electrons are the building blocks of atoms which are elementary particles. The electron was discovered by J.J. Thomson, has a negative charge and has a very small mass.

Electrons orbit the atomic nucleus in certain orbitals and energy levels. The electrons that are in the outermost orbit of an atom are called valence electrons.

Protons are the building blocks of atoms that have a positive charge. Protons have much more mass than electrons, so they account for most of the atomic mass. In atoms, protons are in the atomic nucleus or nucleus along with neutrons.

Neutrons are neutrally charged components of atoms. Neutrons were discovered by James Chadwick and have a slightly heavier mass than protons. Neutrons are also in the atomic nucleus along with protons. Thus, contributes most of the mass of the atom along with the proton.

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P₄ + 10Cl₂ → 4PCl₅  is the balanced chemical equation for the reaction of chlorine gas and solid phosphorus combine to form phosphorus pentachloride gas.

An equation for a chemical reaction is said to be balanced if both the reactants and the products have the same number of atoms and total charge for each component of the reaction.

In other words, both sides of the reaction have an equal balance of mass and charge.

Chlorine gas' chemical formula is Cl₂. Phosphorus solid has the chemical formula P₄.

The chemical formula for phosphorus pentachloride is PCl₅.

Now, here is what the UNBALANCED response will be:

P₄ + Cl₂  → PCl₅.

The equation needs to be balanced:

1. Since we used 4 solid phosphorous atoms as reactants, the final product should also include 4 phosphorus atoms.

P₄ + Cl₂ → 4PCl₅

2- There are currently 20 chlorine atoms in the end products, but only 2 chlorine atoms in the reactants. Therefore, to balance the equation, we need to multiply Cl₂ by 10.

P₄ + 10Cl₂ → 4PCl₅

Following is the final, balanced equation:

P₄ + 10Cl₂ → 4PCl₅

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Answer:

During the fractional distillation of crude oil: heated crude oil enters a tall fractionating column , which is hot at the bottom and gets cooler towards the top. vapours from the oil rise through the column. vapours condense when they become cool enough. liquids are led out of the column at different heights.

The pH of the solution is approximately 0.939 , we can start by determining the degree of ionization (α) of the weak acid, which is given as 9.2%. The degree of ionization represents the fraction of the acid that has dissociated into ions.

We know that the initial concentration of the weak acid is 1.25 M. Let's denote the initial concentration of the acid as [HA] and the concentration of the dissociated H+ ions as [H+]. The concentration of undissociated HA molecules can be represented as [(1 - α) * [HA]].

Given that α = 9.2% = 0.092, we can write the equation for the concentration of H+ ions:

[H+] = α * [HA]

Substituting the values:

[H+] = 0.092 * 1.25 M

[H+] ≈ 0.115 M

Now that we have the concentration of H+ ions, we can calculate the pH using the formula:

pH = -log[H+]

pH = -log(0.115)

pH ≈ 0.939

Therefore, the pH of the solution is approximately 0.939.

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In the kinetics of an iodine clock reaction procedure, the initial rate is calculated by multiplying the initial concentration of one of the reactants by the experimentally determined rate constant.

The iodine clock reaction is a popular experiment in chemistry that is used to study reaction kinetics. In this reaction, iodine is produced as a result of the reaction between potassium iodate, sodium bisulfite, and sulfuric acid.

The rate of the reaction can be measured by adding starch to the solution, which turns blue in the presence of iodine. The time it takes for the blue color to appear is a measure of the reaction rate.

To calculate the initial rate of the reaction, one of the reactants is kept at a constant concentration while the concentration of the other reactant is varied. The rate of the reaction is then measured for each concentration, and a plot of the rate versus concentration is obtained. The initial rate of the reaction is obtained by extrapolating this plot back to the point where the concentration of the reactant is zero.

The initial rate can also be calculated by multiplying the initial concentration of one of the reactants by the experimentally determined rate constant. This method is more accurate than the extrapolation method, as it takes into account the effect of the concentration of all the reactants on the rate of the reaction.

The rate constant is experimentally determined by measuring the rate of the reaction at different temperatures and concentrations and plotting the data to obtain the Arrhenius equation.

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Answer:

Gas can be compress easily than liquid or solid because, molecules are more spread in gas than solin or liquid.

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6.99 grams of iron (Fe) would produce 10 g of rust (Fe2O3) when iron combines with oxygen to form rust.

The mass of a substance can be calculated as follows:

According to this question, iron combines with oxygen to form rust as follows:

4Fe + 3O2 → 2Fe2O3

First, we convert the mass of rust to moles as follows:

moles of Fe2O3 = 10g/159.69 = 0.063moles

Next, convert moles of Fe to mass as follows:

mass of Fe = 0.125 × 55.85 = 6.99g

Therefore, 6.99 grams of iron (Fe) would produce 10 g of rust (Fe2O3) when iron combines with oxygen to form rust.

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The value of Kb for the base is approximately 0.14. Subsequently, by applying the equilibrium expression for Kb, we can calculate the Kb value.

In this problem, we are given the concentration of a base solution (0.15 M) and the hydrolysis constant (a = 0.021, which represents the fraction of the base hydrolyzed). From this information, we can calculate Kb, which is the base dissociation constant.

The hydrolysis constant (a) is defined as the ratio of the concentration of hydrolyzed base ([OH-]) to the initial concentration of the base ([B]):

a = [OH-] / [B]

Since the concentration of hydrolyzed base ([OH-]) is equal to the concentration of hydroxide ions formed during hydrolysis, we can rewrite the equation as:

a = [OH-] / [B]

= [OH-] / (initial concentration of base - [OH-])

Given that a = 0.021 and [B]

= 0.15 M, we can substitute these values into the equation and solve for [OH-]:

0.021 = [OH-] / (0.15 - [OH-])

Rearranging the equation, we get:

0.021(0.15 - [OH-]) = [OH-]

Simplifying further:

0.00315 - 0.021[OH-] = [OH-]

0.00315 = 0.022[OH-]

Dividing both sides of the equation by 0.022, we find:

[OH-] = 0.143 M

Since Kb is the equilibrium constant for the dissociation of the base into hydroxide ions, we can use the concentration of hydroxide ions ([OH-]) to calculate Kb:

Kb = [OH-]^2 / [B]

Substituting the values, we get:

Kb = (0.143)^2 / 0.15

Kb ≈ 0.14

Therefore, the value of Kb for the base is approximately 0.14.

The Kb value for the base, calculated based on the given information, is approximately 0.14. The hydrolysis constant (a) of 0.021 represents the fraction of the base that undergoes hydrolysis, and by using this value, along with the initial concentration of the base, we can determine the concentration of hydroxide ions. Subsequently, by applying the equilibrium expression for Kb, we can calculate the Kb value.

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Answer:

MgCl₂ + H₂ ---> 2 HCl + Mg

Explanation:

Since you have not given any products, I am going to assume that this is a single-displacement reaction. In these types of reactions, an element is being swapped for another in a compound. The unbalanced equation would look like this:

MgCl₂ + H₂ ---> HCl + Mg

Mg does not have a subscript of 2 because it can exist by itself. As you can see, the reaction is not balanced. On the left side, there is 1 Mg, 2 Cl, and 3 H. On the right side, there is only 1 of each. The balanced equation would look like this:

MgCl₂ + H₂ ---> 2 HCl + Mg

Now, there is 1 Mg, 2 Cl, and 2 H on both sides.

A naOH solution with a molecular weight of 0.95m requires 31.2ml to thoroughly react with 23.5ml of a 0.72m solution. Molarity is a crucial unit for expressing how concentrated a solution is.

When expressing a solution's concentration in molarity, the solution's volume is crucial. An inorganic substance having the formula NaOH is sodium hydroxide, sometimes referred to as lye and caustic soda. It is a white, solid ionic compound made up of the cations Na and OH of sodium. Proteins are normally broken down by the highly caustic base and alkali sodium hydroxide. The molecular formula of a substance is used to calculate the molecular weight of an object (i.e., not the simplest formula, which only includes the ratio of types of atoms and not the number).

M = (31.2/23.5)*0.72 M = 0.95m

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Answer:

1. It will most likely die

2. The ostrilope with level 10 armor will most likely reproduce more offspring  because it is adapted to the environment.

Answer:

22.)B. l and lll only

23.)D.sulfuric acid, magnesium, and chocolate chip cookies

and soda pop

To solve this problem, we can use the Ideal Gas Law, which relates the pressure (P), volume (V), number of moles (n), and temperature (T) of a gas. The Ideal Gas Law is expressed as:

PV = nRT

where R is the gas constant.

R = 0.0821 L·atm/mol·K

We can rearrange this equation to solve for pressure:

P = nRT/V

where:

n = 0.500 mol (number of moles of N2 gas)

R = 0.0821 L·atm/mol·K (gas constant)

T = 298 K (temperature)

V = 10.0 L (volume)

Substituting the values:

P = (0.500 mol)(0.0821 L·atm/mol·K)(298 K)/(10.0 L)

P = 12.1 atm

Therefore, the pressure exerted by a 0.500 mol sample of N2 gas in a 10.0 L container at 298 K is 12.1 atm.

From Q = mcΔT, we can rearrange the equation to solve for mass, m = Q/cΔT. The specific heat capacity, c, of solid gold is 0.129 J/g °C. I'm assuming that the energy is given in joules, as it's not specified in the question as written.

m = Q/cΔT = (35.73 J)/(0.129 J/g °C)(40.85 °C - 0.85°C)

m = 6.92 g of gold was present  

The heat of the substance depends on the mass, specific heat, and temperature change of the system. The mass of gold that was present was, 6.92 g.

Mass of the substance in the thermodynamic system is the ratio of the heat to the product of the specific heat and the temperature change. It is given as,

\(\rm m = \rm \dfrac{Q}{c \Delta T}\)

Given,

Heat (Q) = 35.73 J

Specific heat (c) = 0.129 J/g °C

Temperature change = 40 degrees celsius

Mass of gold is calculated as:

35.73 ÷ (0.129) (40) = 6.92 gm

Therefore, 6.92 gms of gold is present.

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Answer:

The answer is true. Hope this helps

The theoretical yield of the reaction is 65.7 grams.

Mass C₆H₆ = 45.6 g

actual yield = 63.7 g

Balanced chemical formula:

C6H6 (l) + Cl2 (g) → C6H5Cl (s) + HCl (g)

Calculate the molar masses of C6H6 and C6H5Cl.

For C₆H₆

Molar mass of C₆H₆ = (12.01 g/mol × 6) + (1.008 g/mol × 6)

Molar mass of C₆H₆ = 78.108 g/mol

For C₆H₅Cl

Molar mass of C₆H₅Cl = (12.01 g/mol × 6) + (1.008 g/mol × 5) + (35.45 g/mol × 1)

Molar mass of C₆H₅Cl = 112.55 g/mol

Since 1 mole of C6H6 = 1 mole of C6H5Cl, the theoretical yield of the reaction is

65.7 grams

Yield calculation = 96.9%

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The first blank should be filled with "chemical shift." The chemical shift is the position of a signal on the NMR spectrum, and it is measured in parts per million (ppm). The chemical shift is determined by the magnetic field experienced by the hydrogen atoms in the molecule and is influenced by the surrounding electron density.

The second blank should be filled with "splitting." Splitting is the appearance of a signal on the NMR spectrum and is caused by the spin-spin coupling between neighboring hydrogen atoms. The splitting is based on the formula N+1, where N is the number of equivalent neighboring hydrogen atoms. The splitting pattern gives information about the number and arrangement of hydrogen atoms in the molecule.

The third blank should be filled with "integration." Integration is the area under a signal on the NMR spectrum and is proportional to the number of hydrogen atoms that produce the signal. Integration allows us to determine the relative number of hydrogen atoms in different parts of a molecule and is useful in determining the molecular formula of an unknown compound.

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Answer:

What is the heat in joules required to raise the temperature of 25 grams of water from 0 degrees C to 100 degrees C? What is the heat in calories? Answer: 10450 J or 2500 calories of heat energy are required to raise the temperature of 25 grams of water from 0 degrees C to 100 degrees C.

The ionization constant of H₂S is approximately 1.0 x 10⁻⁷.

The ionization constant, also known as the acid dissociation constant (Ka), is a measure of the extent to which an acid dissociates in water. It indicates the degree of ionization of an acid and is typically expressed as the equilibrium constant for the reaction between the acid and water.

In the case of H₂S (hydrogen sulfide), it is a weak acid that can partially dissociate in water to produce hydrogen ions (H⁺) and sulfide ions (HS⁻). The ionization reaction can be represented as follows:

H₂S ⇌ H⁺ + HS⁻

The ionization constant (Ka) represents the equilibrium expression for this reaction. The value of Ka determines the relative strength of the acid. For H₂S, the ionization constant is approximately 1.0 x 10⁻⁷, indicating that it is a weak acid.

This value indicates that H₂S only partially ionizes in water, with a small fraction of H₂S molecules dissociating into H⁺ and HS⁻ ions. The majority of H₂S remains in its molecular form.

It is important to note that the ionization constant can vary depending on factors such as temperature and concentration. The given approximation is a typical value at standard conditions.

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By considering the solubility rules, we can determine whether a precipitate will form and its empirical formula when mixing two aqueous solutions.

The table can be completed as follows(image attached):

To determine whether a precipitate will form when solutions A and B are mixed, we need to consider the solubility rules of the compounds involved. If the product of the ions in the solution is insoluble, then a precipitate will form.

In the first case, potassium sulfide (K2S) and iron(II) sulfate (FeSO4) will react to form potassium sulfate (K2SO4) and iron(II) sulfide (FeS), which is insoluble. Thus, a precipitate will form with empirical formula FeS. In the second case, both zinc sulfate (ZnSO4) and iron(II) bromide (FeBr2) are soluble in water and will not react to form an insoluble compound. Therefore, no precipitate will form.

In the third case, barium bromide (BaBr2) and potassium acetate (KC2H3O2) will react to form barium acetate (Ba(C2H3O2)2) and potassium bromide (KBr), which is soluble. However, barium acetate is insoluble and will form a precipitate with empirical formula Ba(C2H3O2)2.

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Gravity, as a fundamental force of nature, is influenced by several factors. The following are some of the key factors affecting gravity:

d) 0.

5 out of 8 would be paired already because it has 5 electrons, then the other 3 would be filled by the 3 hydrogens.