Which of the following would give the highest pH when dissolved in water to form a 0.10 M solution? the potassium salt of a strong acid a strong acid the potassium salt of a weak acid

The mass percent of Cl in SiCl2I2 is 20.13%.

The chemical formula of SiCl2I2 can be broken down into its constituent elements, Si, Cl, and I. The total mass of the compound is the sum of the masses of these elements. Then, we can find the mass percentage of chlorine in SiCl2I2.
The mass of Si is 28.09 g/mol, the mass of Cl is 35.45 g/mol, and the mass of I is 126.9 g/mol. Therefore, the molar mass of SiCl2I2 is:
Molar mass of SiCl2I2 = (28.09 g/mol) + 2(35.45 g/mol) + 2(126.9 g/mol)
= 352.79 g/mol
To find the mass percentage of chlorine in SiCl2I2, we need to determine the mass of chlorine in the compound. There are two chlorine atoms in the molecule, so the mass of chlorine is:
Mass of Cl = 2(35.45 g/mol) = 70.9 g/mol
Now, we can calculate the mass percentage of Cl in SiCl2I2:
Mass percentage of Cl = (Mass of Cl / Molar mass of SiCl2I2) × 100%
= (70.9 g/mol / 352.79 g/mol) × 100%
= 20.13%
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in the periodic tables

elements in the same column have the same charge

in a compound oxidation numbers have to equal 0

1.

sulfur in Li2SO3

charges :

Li = +1 S = +4 O = -2

multiply the charge with the subscripted number next to the element

Li = +1

Li2 = +2

O = -2

O3 = -8

in a compound oxidation numbers have to equal 0

+2 S -6 = 0

S -4 = 0

S = +4

Sulfur = +4

2.

MgCl2

Mg = +2

+2 Cl2 = 0

Cl2 = -2

Cl by itself = -2 divided by 2 = -1

Chlorine  = -1

3.

SiO2

Silicon = +4

4.

Sulfur in H2SO4

H: +1 S: +6 O: -2

H2SO4

H2 : +2 O4: -8

+2 +S -8 = 0

S - 6 = 0

S = +6

Sulfur = +6

5.

Sulfur in SO4^2-

Sulfur in SO4

Sulfur = +4

6.

Manganese in MnO4^-

Manganese in MnO4

Manganese = +4

7.

Cr2O7^2-

Dichromate

Cr in Cr2O7^2- or Cr2O7-2-

Cr: +6 O: -2

Answer:

The sound playing from the first graph is louder, while the sound from the second graph is deeper, both of which have the same pitch.

Explanation:

First let's analyze the graphs,
Comparing the first graph to the second

Concluding from the above observations, the sound playing from the first graph is louder, while the sound from the second graph is deeper, both of which have the same pitch.

The most likely explanation for the given observations is that the crystals lose water when heated, resulting in a transition from crystals to a powdery substance and a decrease in mass after cooling. Option A

When certain substances contain water molecules as part of their crystal structure, heating them can cause the water molecules to evaporate, leading to the loss of water. This can result in a change in the physical properties of the substance, such as a transition from crystalline to powdery form.

The absence of condensation or other visible changes inside the test tube suggests that the substance is not reacting with the air or giving off a colorless gas. If such reactions were occurring, there would likely be observable changes or reactions taking place.

The decrease in mass after cooling can be attributed to the loss of water molecules. Water has mass, and when it evaporates, it escapes from the test tube, causing a reduction in the overall mass of the substance.

Option A

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According to Le Chatelier's principle, the system will respond by shifting the reaction in the forward direction to counteract the increase in X:(g) concentration

Based on the given data, we can observe that the concentration of Xa(g) remains constant throughout the time intervals, while the concentration of Xus)* decreases. This implies that the rate of formation of Xa(g) is higher than the rate of formation of Xus)*.

To calculate the equilibrium constant (K) for the reaction, we can use the equation: K = ([Xa(g)]^2)/([Xus)*]^3. Using the data at equilibrium, we have K = (0.228^2)/(0.06^3) = 236.46.

When more X:(g) is added to the container, the amount of Xa(g) will increase. Therefore, the amount of Xa(g) will INCREASE.

This can be explained using Le Chatelier's principle. By adding more X:(g), the equilibrium of the reaction is disturbed. . As a result, more Xa(g) will be formed to establish a new equilibrium, leading to an increase in the amount of Xa(g).

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Answer:

I answer this one before

Explanation:

right

Answer:

1.  A principle under which all persons, institutions, and entities are accountable to laws that are: Publicly promulgated. Equally enforced. Independently adjudicated. And consistent with international human rights principles.

2. The laws are clear, publicized, and stable; are applied evenly; and protect fundamental rights, including the security of persons and contract, property, and human rights. The processes by which the laws are enacted, administered, and enforced are accessible, fair, and efficient.

3. It codifies the core values of the people. Courts have the responsibility to interpret the Constitution's meaning, as well as the meaning of any laws passed by Congress.  Everything they do must be based on the law, and they are accountable for their decisions. That means officials are held responsible for the choices they make.

Answer:

the answer is calcium

Explanation:

There are various kind of elements that are present in periodic table. Some elements are harmful, some are radioactive, some are noble gases. Option E is correct option.

Periodic table is a table in which we find elements with properties like metals, non metals, metalloids and radioactive element arranges in increasing atomic number.

Periodic table help a scientist to know what are the different types of elements are present in periodic table so that they can discover the new elements that are not being discovered yet. Out of given options, calcium element could be used in industry to control electron flow. Calcium belongs to alkaline earth metals that is group 2 of periodic table.

Therefore, the correct option is option E.

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This element is in group 1.

According to the octet rule, this element would be expected to form an ion with a charge of +1.

If X is in period 5, the ion formed has the same electron configuration as the noble gas Krypton

The symbol for the ion is Rb⁺

Electronic configuration refers to the arrangement of electrons in the orbitals of an atom or molecule, indicating the energy level of the electrons, the number of electrons in each energy level, and the number of electrons in each orbital.

Considering the given element:

It has one valence electron, hence it is in group 1. Group 1 elements form ions with a charge of +1.

Losing one electron will give the ion the same electron configuration as Kyrton since it is the noble gas in Period 4.

The element is rubidium and the ion is Rb⁺.

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The standard reaction enthalpy and the standard reaction enthalpy at 400 K for this reaction are equal to 0.35 kJ and 0.000125 kJ respectively.

Mathematically, the Gibbs's free energy for this chemical reaction can be calculated by using this formula:

ΔG° = -RTlnK = ΔH° - TΔS°    ......equation 1.

First of all, we would determine the value of lnK from the given expression at 390 K and 410 K respectively:

lnK = A + B/T + C/T²

lnK = -1.04 - 1088/T + 1.51 × 10⁵/T²    

lnK = -1.04 - 1088/390 + 1.51 × 10⁵/390²

lnK = -1.04 - 2.79 + 0.99

lnK = -2.84.

At T = 410 K, we have:    

lnK' = -1.04 - 1088/410 + 1.51 × 10⁵/410²

lnK' = -1.04 - 2.65 + 0.90

lnK' = -2.79.

For the standard reaction enthalpy, we have:

lnK' - lnK = ΔH°/R(1/T - 1/T')

-2.79 - (-2.84) = ΔH°/8.314(1/390 - 1/410)

-2.79 + 2.84 = ΔH°/8.314(0.00256 - 0.00244)

0.05 = ΔH°/8.314(0.0012)

0.4157 = 0.0012ΔH°

ΔH° = 0.4157/0.0012

ΔH° = 346.42 ≈ 0.35 kJ.

Next, we would determine the Gibbs's free energy at each temperature:

At T = 390 K, we have:

ΔG° = -RTlnK

Δ₁G° = -8.314 × 390 × (-2.84)

Δ₁G° = 9.21 kJ/mol.

At T = 410 K, we have:

Δ₂G° = -8.314 × 410 × 2.79

Δ₂G° = 9.51 kJ/mol.

For the standard reaction enthalpy at 400 K, we have:

ΔG° = ΔH° - TΔS°

9.51 - 9.21 = 0.35 - 400ΔS°

0.30 = 0.35 - 400ΔS°

400ΔS° = 0.35 - 0.30

400ΔS° = 0.05

ΔS° = 0.05/400

ΔS° = 0.000125 kJ.

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Answer:

A. last  F first E second C thrid b foruth A five

Explanation:

Answer:

399.80 atm

Explanation:

Since there are 101.3 kPa per every 1 atm, you need to divide the given number by 101.3 to convert the pressure from kPa to atm.

1 atm = 101.3 kPa

 40500. kPa               1 atm
---------------------  x  --------------------  = 399.80 atm
                                 101.3 kPa

Answer:

See the explanation

Explanation:

In this case, we have to remember that we have a reaction that goes by radical formation. On the other hand, we have to write only the monochlorinated products this means that we only can add one Cl atom at the time. So, in this specific molecule, we only can have 2 options, 1-chloro-2,3-dimethylbutane and 2-chloro-2,3-dimethylbutane. (See figure 1).

In the reaction mechanism, we have as a first step the production of the radical chlorine Cl. This radical can attack the molecule by a heterolytic rupture and form a carbon-radical. As the final step, the carbon-radical will attack another Cl radical to form a new C-Cl bond. (See figure 2)

I hope it helps!

Answer: 0.27 moles of CO2 and 11.88 grams of CO2

Explanation: Use the Ideal Gas Law, PV = nRT, substitute the values given and solve.

I can't seem to upload procedure but:

P = 1.5atm

V = 4.5L

n = moles

R = 0.0821gr/mol (when using atm, kPa is 8.31)

T = 300K

Isolate what you don't have, in this case n. Change PV = nRT to PV/RT = n. Substitute the values to get moles. Once you have this, multiply the value by the molar mass of CO2 (44gr/mol) to get the mass of CO2 in grams.

Answer:

Interphase is the longest part of the cell cycle, this is when the cell grows and copies its DNA before moving into mitosis.

Explanation:

Answer:

Interphase

Explanation:

Answer:

B. 1-amino-2-methylpentan-2-ol

Explanation:

In this case, the first step, we have the attack of the nucleophile cyanide (\( CN^-\) produced by sodium cyanide to the carbon on the carbonyl group (C=O) producing a negative charge in the oxygen.

Then HCl protonates the molecule to produce a cyanohydrin. This cyanohydrin can be reduced by the action of hydrogen gas (\(H_2\)) in the presence of a catalyst (\(Pd\)), producing an amino group. With this in mind, the final molecule is: 1-amino-2-methylpentan-2-ol.

See figure 1 to further explanations

I hope it helps!

Answer:

This states principle helps explain that an aircraft can achieve lift due to  the shape of its wings.

They wings are  shaped that way  so that that air flows faster over the top of the wing and slower underneath the wing .

In simple terms ;

Fast moving air equals low air pressure while slow moving air equals high air pressure

Explanation:

The volume of copper (II) sulfate in a container is equivalent to 0.650L.

Volume is the three-dimensional measure of space that comprises a length, a width and a height. It is measured in units of cubic centimeters (cm³) in metric, cubic inches or cubic feet in English measurement.

According to this question, a container seems to have about 650 mL of copper(II) sulfate solution in volume. The volume can be converted to litres as follows:

1 millilitre = 0.001 litre

650 millilitres = 0.650 litres

Therefore, 0.650L is the volume of copper II sulfate in litres.

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The properties of hard and soft materials refer to their physical characteristics and behaviors.

These properties are related to factors such as the arrangement of molecules, bonding strength, and response to external forces. Here, we will discuss the general properties of hard and soft materials.

Hard materials:

Rigidity: Hard materials exhibit high stiffness and resist deformation under applied forces. They tend to maintain their shape and structure.

High strength: Hard materials have strong intermolecular or intramolecular forces, allowing them to withstand high stress and pressure without breaking or deforming.

High melting and boiling points: Hard materials often have high melting and boiling points due to the strong bonds between their atoms or molecules.

Brittle: Hard materials are often brittle, meaning they have low tolerance to tensile or bending forces and are prone to fracturing or shattering instead of deforming.

Low compressibility: Hard materials have low compressibility, meaning they do not easily compress or change volume under pressure.

Soft materials:

Flexibility: Soft materials are pliable and easily deformable under applied forces. They can be bent, stretched, or compressed without breaking.

Low strength: Soft materials have weak intermolecular or intramolecular forces, making them more susceptible to deformation or damage under stress.

Low melting and boiling points: Soft materials generally have lower melting and boiling points compared to hard materials.

Ductile: Soft materials are often ductile, meaning they can be drawn into thin wires or stretched into thin sheets without fracturing.

High compressibility: Soft materials can be easily compressed or change volume under pressure due to their loosely packed molecular structures.

It's important to note that these properties are generalizations, and there can be variations within each category. Some materials may exhibit properties that fall between hard and soft, or they may have unique combinations of properties. Materials' properties play a crucial role in various applications, as they determine their suitability for specific uses such as construction, manufacturing, and design.

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Answer: We must first compute the quantity of H2O that can result from the reaction of AL(CH)3 and H2SO4 in order to determine the mass of H2O produced.

Explanation:

Let's begin by formulating the reaction's balanced chemical equation:

Al2(SO4)3 + 6 H2O + 2 CH4 = 2 AL(CH)3 + 3 H2SO4

According to the equation, 2 moles of AL(CH)3 and 3 moles of H2SO4 combine to form 6 moles of H2O.

1.75 g of AL(CH)3 is equal to: 1.75 g / 78.0 g/mol = 0.0224 mol of AL(CH)3 as 1 mole of AL(CH)3 has a molar mass of roughly 78.0 g/mol.

2.00 g of H2SO4 is equal to: 2.00 g / 98.1 g/mol = 0.0204 mol of H2SO4 as 1 mole of H2SO4 has a molar mass of roughly 98.1 g/mol.

In order to calculate the amount of H2O produced, we must now identify the limiting reagent.

We contrast the moles of AL(CH)3 and H2SO4 in use. AL(CH)3 and H2SO4 have a stoichiometric ratio of 2 to 3. As a result, 3 moles of H2SO4 are required for every 2 moles of AL(CH).

The equation states that 2 moles of AL(CH)3 will yield 6 moles of water. Therefore, we can calculate the moles of H2O created for 0.0224 mol of AL(CH)3 as follows: 0.0224 mol AL(CH)3 (6 mol H2O / 2 mol AL(CH)3) = 0.0672 mol H2O

Finally, we may use the molar mass of H2O to convert its moles to grams. H2O has a molar mass of about 18.0 g/mol:

18.0 g/mol x 0.0672 mol H2O = 1.21 g H2O

As a result, the mass of H2O generated is roughly 1.21 grams if H2SO4 is the limiting reagent.

Answer:70L

Explanation:

The volume occupied by 100g of oxygen gas at STP is 70L.

1 mole of a gas at STP occupies 22.4 L volume.

The same goes for oxygen gas, \(O_2\). 1 mole of \(O_2\) occupies 22.4L volume.

Now the molar mass of \(O_2\) is = 32g

So the number of moles of \(O_2\) in 100g is

n = 100/32

n = 3.125 moles

Volume occupied by 3.125 moles or 100g of \(O_2\) is

V = 3.125 × 22.4 L

V = 70 L volume is occupied by 100g of oxygen gas.

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Answer:

Explanation:

The actual boiling point is probably between 34C and 40C.

Temperature measures the average kinetic energy of particles of the substances. Therefore, the correct option is option D that is the actual boiling point is probably between 34°C and 40°C.

Temperature is used to measure degree or intensity of heat of a particular substance. Temperature is measured by an instrument called thermometer.

Temperature can be measured in degree Celsius °c, Kelvin k or in Fahrenheit. Temperature is a physical quantity. Heat always flow from higher temperature source to lower temperature source.

We can convert these units of temperature into one another. The relationship between degree Celsius and Fahrenheit can be expressed as:

°C={5(°F-32)}÷9

The actual boiling point is probably between 34°C and 40°C.

Therefore, the correct option is option D.

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Answer:

Ksp=5.5x10^46

Explanation:

Calculate the solubility of Au(OH)3 in water

Since what we have is an alpha decay, the missing component is 234/90 Th

Alpha decay is a type of radioactive decay in which an atomic nucleus emits an alpha particle, which is a helium nucleus consisting of two protons and two neutrons. During alpha decay, the atomic number of the parent nucleus decreases by two, and the mass number decreases by four.

Apha particles can be stopped by a thin layer of material such as paper or skin, and they do not penetrate very far into matter.

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Answer:

1. Rinse with distilled water.

2. Avoid dropping it

3. Use a stopper and fill with water and shake

4. Dry

1. The final temperature is 768 Kelvin.

2. the final pressure is 29.1 atm

Temperature is described as a physical quantity that expresses the hotness of matter or radiation.

We will use the equations of the adiabatic process:

Pressure is described as the force applied perpendicular to the surface of an object per unit area over which that force is distributed.

P11 ^ = P22

P2 = P1 (12)^

1.00 atm = (1/ 0.09)^ 7/5

P2 = 29.1 atm.

2 = 1 (1/2)−1

T2 = = 293 K ( 1 / 0.09)^ (7/5)^−1

T2 = 768 kelvin

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Combination Reaction.

Explanation:

Answer:

Both Tech A and Tech B.

Explanation:

Catalyst is an element used to start chemical reaction but is not used in the reaction. Catalysts material used in catalytic converter include Rhodium, Palladium and platinum. The pre cat and post cat oxygen sensors helps determine converter efficiency.

Answer:

Explanation:

B

The calculated formula masses to 133.5 amu, we find that the substance with a formula mass closest to 133.5 amu is (d) AlCl3. Therefore, the answer is option D.

To identify the substance with a formula mass of 133.5 amu, we need to calculate the formula mass of each given substance and compare it to 133.5 amu.

(a) MgCl2:

The formula mass of MgCl2 can be calculated by adding the atomic masses of magnesium (Mg) and chlorine (Cl).

Mg: atomic mass = 24.31 amu

Cl: atomic mass = 35.45 amu

Formula mass of MgCl2 = (24.31 amu) + 2(35.45 amu) = 95.21 amu

(b) SCl:

The formula mass of SCl can be calculated by adding the atomic masses of sulfur (S) and chlorine (Cl).

S: atomic mass = 32.07 amu

Cl: atomic mass = 35.45 amu

Formula mass of SCl = 32.07 amu + 35.45 amu = 67.52 amu

(c) BCl:

The formula mass of BCl can be calculated by adding the atomic mass of boron (B) and chlorine (Cl).

B: atomic mass = 10.81 amu

Cl: atomic mass = 35.45 amu

Formula mass of BCl = 10.81 amu + 35.45 amu = 46.26 amu

(d) AlCl3:

The formula mass of AlCl3 can be calculated by adding the atomic mass of aluminum (Al) and 3 times the atomic mass of chlorine (Cl).

Al: atomic mass = 26.98 amu

Cl: atomic mass = 35.45 amu

Formula mass of AlCl3 = 26.98 amu + 3(35.45 amu) = 133.78 amu. Option D

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