When adding an acid to a basic solution, the ph will:.

Answer:

2. Write balanced nuclear equations for the following situations. For each, be sure to show the parent element, the daughter element, and any particles emitted. For each element, use notation that includes atomic mass and atomic number. (12 points)

a. Actinium-225 decays by alpha decay. (3 points)

225 - 4 = 221, 89 - 2 = 87,  

" 225/89 Ac = 221/87 Fr + 4/2 a "

b. Helium-6 decays by beta decay. (3 points)

neutron=  4-1=3 proton= 2+1=3

" 6/2 He = 6/3 Li + 0/-1 β "

c. Barium-141 and krypton-92 are produced by the bombardment of uranium-235 with a neutron. Complete the reaction:(3 points)

235/92 Ur + 1/0 n = 141/56 Ba + 92/36 Kr ?

d. Deuterium and tritium fuse to form helium-4. (3 points)

2/1 H + 3/1H = 4/2 He + 1/0 n

Explanation:

a p e x, and btw the deuterium and tritium are isotopes of hydrogen, your welcome :)

I'd say it's single replacement/displacement

The dissolution reaction for sodium bitartrate (NaHC4H4O6) is:

NaHC4H4O6(s) ⇌ Na+(aq) + HC4H4O6-(aq)

The associated Ksp expression for this dissolution reaction is:

Ksp = [Na+][HC4H4O6-]

The dissolution reaction for sodium bicarbonate (NaHCO3) is:

NaHCO3(s) ⇌ Na+(aq) + HCO3-(aq)

The associated Ksp expression for this dissolution reaction is:

Ksp = [Na+][HCO3-]



A dissolution reaction refers to the process of dissolving a solid in a liquid. In the case of sodium bitartrate and sodium bicarbonate, they are both solids that can dissolve in water. When these compounds dissolve, they dissociate into their constituent ions, which are sodium (Na+), hydrogen tartrate (HC4H4O6-), and hydrogen carbonate (HCO3-).

The Ksp expression for a dissolution reaction is an equilibrium constant that expresses the solubility of a compound in water. It is the product of the concentrations of the dissolved ions raised to their stoichiometric coefficients in the balanced equation. In the case of sodium bitartrate and sodium bicarbonate, their Ksp expressions only involve the concentrations of their constituent ions, which are Na+ and HC4H4O6- for sodium bitartrate, and Na+ and HCO3- for sodium bicarbonate.

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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 we have

\(volume = \frac{6.5}{0.72} \\ = 9.027777...\)

We have the final answer as

Hope this helps you

Explanation:

molecules NH3 = 1.47 moles x 6.02x1023 molecules/mole = 8.9x1023 molecules of NH3 (to 2 sig. figs.)

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Br- + 2MnO4- + 2H+ → BrO3- + 2MnO2 + H2O

Given

MnO4- + Br- = MnO2 + BrO3-

Required

The half-reaction

Solution

In acidic conditions :

1. Add the coefficient

2. Equalization O atoms (add H₂O) on the O-deficient side.  

3. Equalization H atoms (add H⁺ ) on the H -deficient side.  .  

4. Equalization of charge (add electrons (e) )

5. Equalizing the number of electrons and then adding the two half -reactions together

Oxidation : Br- → BrO3-  

Reduction : MnO4- → MnO2

Br- + 3H2O → BrO3-  

MnO4- → MnO2 + 2H2O

Br- + 3H2O → BrO3- + 6H+  

MnO4- + 4H+ → MnO2 + 2H2O

Br- + 3H2O → BrO3- + 6H+ + 6e-         x1

MnO4- + 4H+ + 3e- → MnO2 + 2H2O x2

Br- + 3H2O → BrO3- + 6H+ + 6e-  

2MnO4- + 8H+ + 6e- → 2MnO2 + 4H2O

Br- + 2MnO4- + 3H2O + 8H+ + 6e- → BrO3- + 2MnO2 + 6H+ + 4H2O + 6e-

Br- + 2MnO4- + 2H+ → BrO3- + 2MnO2 + H2O

Plate tectonic processes are responsible for various crustal features, such as mountains at convergent boundaries, mid-ocean ridges at divergent boundaries, earthquakes and volcanic activity at transform boundaries, and visible features like rift valleys and subduction zones.

The three types of plate boundaries are convergent, divergent, and transform boundaries.

Many crustal features can be seen as having resulted from plate tectonics. Where two plates come together at a convergent boundary, they collide and form such features as mountains. When two plates move away from each other the result is a divergent boundary, and they form such features as mid-ocean ridges. A transform boundary forms when two plates slide past each other. If the pressure between two plates builds high enough, the plates may move rapidly causing earthquakes and the occurrence of volcanic activity. Features such as ridges and trenches can be seen from space and lend support to the plate tectonics theory.

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Answer: D. Synthesis

Explanation:

Sodium Oxide + Water = Sodium Hydroxide

The stable magnesium isotope has a nuclear spin of 5/2, a 10.0 atom percent natural abundance, and a relative atomic mass of 24.985837 amu.

Isotopes are atoms with the same number of protons but differing numbers of neutrons. The quantity of a substance is determined by mass. It is expressed as a kilogram or gram. The mass of an element's isotopes is known as the average mass. It can be computed by multiplying an isotope's mass by its natural abundance.

The mass that is in relation to a substance that is regarded as standard is called the relative mass. Relative mass in chemistry is equivalent to one-twelfth the mass of the C-12 isotope].

Average atomic mass is equal to (mass of the first isotope times its percent abundance) plus (mass of the second isotope times its percent abundance).

replacing the specified values

Average atomic mass is equal to 0.7899 x 23.985 x 0.10 x 24.985 x 0.101 x 25.9825, or 24.305 amu.

Consequently, magnesium has an average atomic mass of 24.305 amu.

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Answer:

B) From the car

Explanation:

The car is in motion

In a solvent, a solute is dissolved. An ingredient that dissolves in a solvent to create a solution is known as a solute. The solute is the material that is being dissolved, while the solvent is the dissolving medium.

In a solution, the solute is dispersed uniformly throughout the solvent, and the solute molecules are encircled by solvent molecules. Although it is most frequently a liquid, the solvent can also be a gas or a solid. The solute may be a gas, a liquid, or a solid.

A homogeneous mixture is created when a solute is dissolved in a solvent as a result of interactions between the molecules of the solute and the solvent.

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The pH value when a solution with a pH of 5 and pH 2 mixed together will depend on the amounts of each solution that were mixed together.

To calculate the resulting pH value, you would need to use the equation for calculating the pH of a solution:

pH = -log[H⁺]

where [H⁺] is the concentration of hydrogen ions in the solution. The pH of the resulting solution will be lower than pH 5, since pH 2 is more acidic than pH 5. However, without knowing the specific concentrations of the solutions that were mixed together, it is not possible to determine the exact pH value of the resulting solution.

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The current involved is 44.7 A

In an electrolytic reaction, we have the situation in which one specie is oxidized and the other specie is reduced in the electrochemical reaction. We have the reaction that occurs as;

2Cl^-(aq) ------> Cl2(g) + 2e

Now;

If 2 * 96500 C liberates 22.4 dm^3 of Cl2

x C liberates 20dm³ of chlorine gas at STP

x =  2 * 96500 C *  20dm³/24 dm³

x = 160833.33 C

Now

Q = It

Q = quantity of electricity

I = current

t = time = 1 hour or 3600 s

I = Q/t =  160833.33 C/ 3600 s

I = 44.7 A

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Control Experiment: Those experiment where a control is taken as a reference to notice the changes in same reaction in the presence of external stress.

Need for a control in a experiment: The control is required to analyse the effect of stress applied to reaction. For e.g. If there are two compounds AB and XY & they are undergoing displacement reaction to form AX & BY, But all sudden another salt let MN is added into the reaction then there are possibilities of formation of different products depending upon the reactivity of initial reactants and external compound. The product can be same as our Control i.e. AB & XY if MN remains inert in the reaction. That's why control is important to compare the results.

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The type of meeting that typically involves a speaker with attendees taking notes or referring to other materials while sitting at tables or other furniture that allows them to write easily is a lecture or a seminar.

In a lecture, the speaker presents information on a particular topic to an audience, often with the intention of imparting knowledge or educating the attendees. The attendees may take notes, ask questions, or participate in discussion after the lecture.

In a seminar, a more interactive format is used where the speaker presents information and then the attendees are expected to actively participate in discussions, group work, or other activities related to the topic. Again, attendees may take notes, but they may also be called upon to actively contribute to the discussion.

Both lectures and seminars often take place in an educational or professional setting, such as a university or a workplace. The attendees may be students, employees, or professionals seeking continuing education or professional development opportunities.

d[NO]/dt, d[O2]/dt, and d[NO2]/dt represent the rates of change in concentration of NO, O2, and NO2, respectively.

2 NO + O2 → 2 NO2

To express the rate of reaction in terms of the concentration change for each species involved, you can write it as:

Rate of reaction = - (1/2) * d[NO]/dt = - d[O2]/dt = (1/2) * d[NO2]/dt

Here, d[NO]/dt, d[O2]/dt, and d[NO2]/dt represent the rates of change in concentration of NO, O2, and NO2, respectively. The negative signs indicate that the concentration of reactants (NO and O2) decreases, while the positive sign indicates that the concentration of the product (NO2) increases as the reaction proceeds.To express the rate of the reaction in terms of the rate of concentration change for each of the three species involved, we need to determine the stoichiometry of the reaction and apply the rate law.

The given reaction is:

2 NO + O2 → 2 NO2

Let's define the rate of the reaction as the change in concentration of any of the reactants or products over time. We'll use square brackets to denote concentration.

The rate of the reaction can be expressed as:

Rate = Δ[NO] / Δt = -1/2 * Δ[O2] / Δt = 1/2 * Δ[NO2] / Δt

The negative sign in front of Δ[O2] accounts for the fact that the concentration of O2 decreases over time, while the concentrations of NO and NO2 increase.

Note that the stoichiometric coefficients in the balanced equation determine the ratio of the rate of concentration change for each species. In this case, 2 moles of NO react with 1 mole of O2 to produce 2 moles of NO2. Hence, the rate of concentration change of NO is equal to the rate of concentration change of O2 (with opposite signs), while the rate of concentration change of NO2 is half the magnitude of the rates for NO and O2.

Therefore, the rate of the reaction can be expressed as:

Rate = -Δ[NO] / (2 * Δt) = -Δ[O2] / (2 * Δt) = 1/2 * Δ[NO2] / Δt

The negative signs in front of Δ[NO] and Δ[O2] indicate the decrease in their concentrations, while the positive sign in front of Δ[NO2] indicates the increase in its concentration over time.

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Answer:

35.48948 u

Explanation:

Technically u need to multiply the amu with the percentage of the specific isotope. Because it's a percentage u need to divide by 100. When. You get ur final answers u add the two to get the average atomic mass for the Chlorine.

I hope I helped I suck at explaining

35 x 75.711% / 100 = 26.49885 u

37 x 24.229% / 100 = 8.99063 u

26.49885 + 8.99063 = 35.48948u if u need to round off the nr it will be 35.49 u

When omitting the sodium thiosulfate solution from the kinetic trials, the resultant solution from mixing solutions A and B will appear differently than a correctly completed experiment.

Without the sodium thiosulfate, a reaction between the two solutions would not occur, so the resultant solution would be that of an unmixed combination of A and B, rather than a reaction product.

This can be confirmed by running the experiment correctly and including the sodium thiosulfate solution in the kinetic trials.

Omitting the sodium thiosulfate solution can significantly affect the appearance of the resulting solution from a kinetic experiment by not neutralizing the excess iodine and leaving unreacted iodine present in the solution.

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By gaining  additional electron and achieving a stable electron configuration, chlorine fulfills the octet rule and achieves greater stability in its chemical interactions.

Group 17 of the periodic table, sometimes known as the halogens, includes chlorine, which has the atomic number 17. Since halogens contain seven valence electrons, chlorine also has seven of them.

Chlorine seeks to achieve a full outer electron shell, which is the electron configuration of the closest noble gas, in this case, argon (atomic number 18), in order to achieve stability. Eight valence electrons make up the whole outer shell of argon.

Chlorine requires one extra electron to gain stability and conform to the octet rule. Chlorine will complete its outer shell and achieve the electron configuration of the noble gas argon by gaining one electron, giving it a total of eight valence electrons. Chlorine now transforms into a chloride ion (Cl-) -1 charge, as it has gained one electron.

By gaining this additional electron and achieving a stable electron configuration, chlorine fulfills the octet rule and achieves greater stability in its chemical interactions.

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To determine the total number of grams of magnesium (Mg) consumed when 0.50 mole of hydrogen gas (H2) is produced, we need to use the stoichiometry of the balanced chemical equation.

This equation allows us to establish the molar ratio between Mg and H2, enabling the conversion of moles of one substance to moles of another.

In order to calculate the mass of Mg consumed, we first need to determine the molar ratio between Mg and H2 from the balanced chemical equation. The balanced equation for the reaction in question is:

\(Mg + H_2O \rightarrow MgO + H_2\)

From this equation, we can see that one mole of Mg reacts with one mole of \(H_2\)to produce one mole of \(H_2\). Therefore, the molar ratio between Mg and \(H_2\) is 1:1.

Given that 0.50 mole of H2 is produced, we can conclude that 0.50 mole of Mg is consumed. To convert moles to grams, we need to multiply the moles of Mg by its molar mass, which is approximately 24.31 g/mol.

Mass of Mg consumed = 0.50 mole * 24.31 g/mol = 12.15 grams.

Thus, the total number of grams of Mg consumed when 0.50 mole of H2 is produced is 12.15 grams.

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Takealot excels at providing convenience, extensive product selection, competitive pricing, and a seamless online shopping experience as its value proposition for consumers.

Convenience is a key aspect of Takealot's value proposition. As an online retailer, Takealot offers the convenience of 24/7 shopping from the comfort of one's own home.

Customers can browse a wide range of products, place orders, and have them delivered directly to their doorstep.

Takealot also offers an extensive product selection, spanning various categories such as electronics, fashion, home goods, and more.

This breadth of choices allows consumers to find and compare different products all in one place, saving them time and effort compared to traditional retailers with limited inventory.

Competitive pricing is another area where Takealot excels. By operating online, the company has lower overhead costs compared to brick-and-mortar retailers, enabling them to offer competitive prices and discounts to their customers.

The seamless online shopping experience provided by Takealot includes user-friendly interfaces, secure payment options, and efficient delivery services. This enhances customer satisfaction and convenience.

In contrast, traditional non-online retailers typically have limited operating hours, smaller product selections, and may not offer the same level of convenience and competitive pricing.

They often require customers to physically visit their stores, which can be time-consuming and may not provide the same level of ease and accessibility as online platforms like Takealot.

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According to the question the Ksp of KClO₃ at 74°C is 1.07 x 10-3 mol²/L²

Temperature is a physical property of matter that quantitatively expresses the common notions of hot and cold. It is measured by a thermometer and indicated by a numerical value on a mutually agreed-upon temperature scale such as Celsius, Fahrenheit, or Kelvin.

The Ksp of a substance is the equilibrium constant for the dissolution reaction for that substance. To calculate the Ksp of KClO₃ at 74 oC, we first need to calculate the molar concentration of KClO₃ in the solution.
Since 4.00 g of KClO₃ has a molar mass of 122.5 g/mol, the molar concentration of KClO₃ would be
c = 4.00 g/122.5 g/mol = 0.0327 mol/L
The Ksp of KClO₃ at 74 oC can then be calculated using the following equation:
Ksp = [K+] x [ClO³⁻]
where [K+] and [ClO³⁻] are the molar concentrations of the K+ and ClO3- ions, respectively.
Since KClO₃ dissociates completely into K⁺ and ClO³⁻ ions, the molar concentration of each ion is equal to the molar concentration of KClO₃, which we calculated to be 0.0327 mol/L.
Therefore, the Ksp of KClO₃ at 74 oC is
Ksp = [K⁺] x [ClO³⁻] = (0.0327 mol/L) x (0.0327 mol/L) = 0.00107089 mol²/L²
or
Ksp = 1.07 x 10-3 mol²/L²

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Answer:

pollution and waste every where like in are ouceans

Explanation:

People around us will affect us in positive or negative way. If someone is going to torture mentally or abuse by anything it will negatively impact on us. If some people support for our good deeds it will helps us positively.

We are all social livings. We do influenced from our surrounding atmosphere, the people, place, climate everything. There will be positive things as well negative influences.

Some people behaves as anti social and they may ruin the life of others directly or indirectly. They may abuse others or being angry. These facts will make a person hate or the circumstances and will tend to runoff there.

Some other people always support for good beings and motivates others in their falls and hopeless conditions. From these kind of people, we can absorb the positive thoughts from positive people.

Good deeds and positive talks will make the surroundings also positives otherwise it will lead to negative thoughts and image that affect mental health.

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In the heliocentric model, the object at the center of the solar system is the Sun. Therefore, the answer is B.

What is the heliocentric model?

The heliocentric model is a theory that places the Sun at the center of the solar system, with all the planets orbiting around it. This model was first proposed by the ancient Greek astronomer Aristarchus of Samos in the 3rd century BCE, but it was not widely accepted until the 16th century when the Polish astronomer Nicolaus Copernicus presented a detailed mathematical description of the heliocentric model.

The heliocentric model provided a more accurate description of the solar system, and it was later confirmed by the observations and calculations of other astronomers such as Johannes Kepler and Galileo Galilei. The heliocentric model is now widely accepted, and it forms the basis of modern astronomy.

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The complete question is: The Sun is at the center of the solar system in the heliocentric model.

The pH of the resulting solution from mixing HNO₂ and RbOH is 3.25.

pH of a solution can be defined as the concentration of H⁺ ions in the solution.To determine the pH of the resulting solution from mixing HNO₂ and RbOH,  write the balanced equation for the reaction between the two:

HNO₂ + RbOH → RbNO₂ + H₂O

Step 1: Write the dissociation reaction for HNO₂ and its equilibrium expression:

HNO₂ + H₂O ⇌ H₃O⁺ + NO₂⁻

K = [H₃O⁺][NO₂⁻] / [HNO₂]

Step 2: Calculate the initial concentration of HNO₂:

Molarity = moles / volume (in L)

moles HNO₂ = 1.860 M × 0.162 L = 0.30132 moles

Step 3: Calculate the initial concentration of RbOH:

Molarity = moles / volume (in L)

moles RbOH = 1.090 M × 0.121 L = 0.13169 moles

Step 4: Determine which reactant is limiting:

HNO₂: 0.30132 moles → produces 0.30132 moles of H₃O⁺

RbOH: 0.13169 moles → produces 0.13169 moles of OH⁻

Since HNO₂ produces more moles of H₃O⁺ than RbOH produces of OH⁻, HNO₂ is the limiting reactant.

Step 5: Calculate the concentration of H₃O⁺ ions using the equilibrium expression and the initial concentration of HNO₂:

K = [H₃O⁺][NO₂⁻] / [HNO₂]

[H₃O⁺] = K x [HNO₂] / [NO₂⁻] = (5.62 × 10⁻⁴) x (0.30132) / (0.30132) = 5.62 × 10⁻⁴ M

Step 6: Calculate the pH of the solution:

pH = -log[H₃O⁺] = -log(5.62 × 10⁻⁴) = 3.25

Therefore, the pH of the resulting solution from mixing HNO₂ and RbOH is 3.25.

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The question is incomplete, but most probably the complete question is,

Determine the pH of the solution resulting from mixing a solution of 162 mL of HNO₂ (K-5.62e-04) at a 1.860 M concentration, with 121 mL of a 1.090 M solution of RbOH?