Which compound below will readily react with a solution of bromine resulting from a mixture of 48% hydrobromic acid and 30% hydrogen peroxide? a.Cyclohexene b.Dichlorometane c.Acetic acid d.t-Butyl alcohol e.Cyclohexane

There are approximately 4.5 x 10^23 atoms in 0.75 mol of H2O.

Or 4,500,000,000,000,000,000,000.

A photon of light has an energy of 3.977 x [tex]10^{-19}[/tex] joules and a wavelength of 0.050 centimetres.

The energy of a photon is related to its wavelength by the formula E = hc/λ, where E is the energy, h is Planck's constant (6.626 x [tex]10^{-34}[/tex] joule seconds), c is the speed of light (2.998 x [tex]10^{8}[/tex] meters per second), and λ is the wavelength of the photon.

To use this formula, we need to convert the wavelength of the photon from centimeters to meters, since c is given in meters per second. We can do this by dividing 0.050 cm by 100, which gives us 5.0 x [tex]10^{-4}[/tex]meters.

Now we can plug in the values we have into the formula: E = (6.626 x [tex]10^{-34}[/tex] joule seconds) x (2.998 x [tex]10^{8}[/tex] meters per second) / (5.0 x [tex]10^{-4}[/tex]meters)

Simplifying the equation, we get:

E = 3.977 x [tex]10^{-19}[/tex] joules

Therefore, a photon of light with a wavelength of 0.050 cm has an energy of 3.977 x [tex]10^{-19}[/tex] joules. It is important to note that photons are the smallest quantifiable packets of electromagnetic energy, and their energy is directly proportional to their frequency and inversely proportional to their wavelength.

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Answer:

a) Ethanol + K2Cr2O7 / H+ / Reflux → Acetaldehyde

CH3CH2OH + [O] → CH3CHO

b) Ethanol + K2Cr2O7 / H+ / Distil → Ethene

CH3CH2OH + [O] → CH2=CH2 + H2O

c) Propan-1-ol + K2Cr2O7 / H+ / Reflux → Propanal

CH3CH2CH2OH + [O] → CH3CH2CHO

d) Propan-2-ol + K2Cr2O7 / H+ / Reflux → Propanone (acetone)

(CH3)2CHOH + [O] → (CH3)2CO

e) 3-Methylbutan-1-ol + K2Cr2O7 / H+ / Reflux → 3-Methylbutanal

CH3CH(CH3)CH2CH2OH + [O] → CH3CH(CH3)CH2CHO

f) 4-Chloropentan-1-ol + K2Cr2O7 / H+ / Distil → 4-Chloropentanal

Cl(CH2)3CH2CH(OH)CH3 + [O] → Cl(CH2)3CH2CH=O + H2O

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Electrons have a negative electrical charge, whereas protons have a positive charge.

Subatomic particles like electrons and protons are essential in defining how atoms and molecules behave. Electrons are negatively charged particles that move in shells or energy levels around an atom's nucleus. The positive charge of protons and the negative charge of electrons are identical in magnitude but diametrically opposed in sign. Together with neutral neutrons, protons are positively charged particles that make up an atom's nucleus. An atom's proton count establishes the element it belongs to. Atoms' chemical activity, particularly their capacity to form chemical bonds and reactions, is greatly influenced by the charges of their protons and electrons.

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Answer: -230 N

Explanation:

The electrical force between two point charges q1 and q2 separated by a distance r is given by Coulomb's law:

F = k * (q1 * q2) / r^2

where k is the Coulomb constant, q1 and q2 are the magnitudes of the charges, and r is the distance between them.

In this case, we have a positive charge and a negative charge, which means that q1 and q2 have opposite signs. Let's assume that the positive charge has a magnitude of q and the negative charge has a magnitude of -q. Then, the electrical force between them can be calculated as:

F = k * (q * (-q)) / r^2 = -k * q^2 / r^2

Substituting the given values of e and k, we get:

F = - (8.99 × 10^9 N m^2/C^2) * (1.6 × 10^-19 C)^2 / (10^-15 m)^2 ≈ -230 N

Note that the negative sign indicates that the force is attractive, which is expected for opposite charges. Therefore, the correct answer is:

-230 N.

Answer:

This is due to the very slow wobble of the axis of Earth. Which change is most likely to occur because of the movement of the axis? Winter and summer months will reverse

Explanation:

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In the pictured cell, the side containing zinc is the anode and the side containing copper is the cathode. The purpose of the Na2SO4 is to facilitate the transfer of electrons from the anode to the cathode.

A cell is a unit of life that is the smallest and most simple living organism, it can be classified as a complete organism, with all of the components that make up a living being, including DNA, membranes, and organelles. A voltaic cell is a device that converts chemical energy into electrical energy, it is also known as a galvanic cell or a Daniell cell. It is made up of two different metals that are submerged in an electrolyte solution that enables the transfer of electrons from one electrode to the other. The anode is the electrode that oxidizes and loses electrons during a redox reaction, this electrode is negatively charged, as it is the site of the oxidation reaction that releases electrons and generates an electrical current.

A cathode is an electrode that is reduced and gains electrons in a redox reaction, this electrode is positively charged and acts as a sink for electrons, absorbing them and using them to create a reduction reaction that generates an electrical current. The Na2SO4 in the pictured cell is an electrolyte solution that facilitates the transfer of electrons from the anode to the cathode. The salt dissociates into Na+ and SO42- ions, which then migrate toward the anode and cathode, respectively, where they can participate in redox reactions that generate an electrical current. This flow of ions helps to maintain a balance of charge in the cell and enables the transfer of electrons to occur more efficiently.

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Answer:

chelated zinc is more easily absorbed than zinc on it's own.

Ion channels that open and close in response to a change in membrane potential are called voltage-gated ion channels.

Voltage-gated ion channels are a specialized type of membrane protein that are embedded in the lipid bilayer of excitable cells. They have a pore that allows ions to flow through, and they can be selective for different types of ions, such as sodium (Na+), potassium (K+), or calcium (Ca2+).

The opening and closing of the channel's pore is controlled by changes in the membrane potential, which is the difference in electrical charge across the cell membrane.

These channels are crucial for the generation and propagation of electrical signals in excitable cells, such as neurons and muscle cells. Voltage-gated ion channels are capable of detecting small changes in membrane potential and responding by opening or closing their pore, allowing ions to flow across the membrane and alter the electrical state of the cell.

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Al(NO3)3 solution concentration and the concentration of H3O+ ions in the solution following the addition of HNO3 are given in the problem. We can determine the presence of [Al(H2O)5(OH)2+] in the solution using this knowledge along with the known equilibria for the hydrolysis of Al3+.

For Al3+, the hydrolysis process may be expressed as follows:

Al(H2O)63+ + water becomes Al(H2O)5(OH)2+ + H3O+.

The reaction's equilibrium constant expression is as follows:

Al(H2O)5(OH)2+) = K

Al(H2O)63+ / [H3O+]

We must take into account the dissociation of Al(NO3)3 in water in order to determine [Al(H2O)5(OH)2+] in a 0.15 M solution of Al(NO3)3:

Al3+ (aq) + 3NO3- Al(NO3)3 (s) (aq)

Al3+ has a concentration of 0.45 M (3 times that of the Al(NO3)3 solution) in an Al(NO3)3 solution with a concentration of 0.15 M. H3O+ is present in the solution at a concentration of 0.10 M.

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The CNO cycle and the proton-proton chain don't release the same amount of energy per He nucleus produced.

Let's understand this in detail:

1. The CNO cycle produces more energy than the proton-proton chain per He nucleus produced. The proton-proton chain and CNO cycle produce energy by nuclear fusion in the sun's core.

2. In the core of the Sun, the proton-proton chain occurs. It converts four hydrogen nuclei (protons) into one helium nucleus via a series of nuclear reactions. This reaction liberates a significant amount of energy through gamma rays and neutrinos.

3. The CNO cycle also takes four hydrogen nuclei, producing one helium nucleus. The key difference between these two processes is the method in which helium is produced.

4. In the proton-proton chain, two protons combine to form deuterium. This then combines with another proton to form helium-3, and two helium-3 nuclei combine to form helium-4.

5. In the CNO cycle, hydrogen is fused with carbon, nitrogen, and oxygen isotopes to create helium. The CNO cycle releases more energy than the proton-proton chain per He nucleus produced because it has more intermediate steps.

5. The CNO cycle requires more heat and pressure to function because it involves carbon, nitrogen, and oxygen isotopes, which are heavier elements. The proton-proton chain is simpler because it only involves hydrogen and doesn't require as much energy.

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A) The solute in tank B will dissolve first, is the key response.Temperature, pressure, and concentration are only a few examples of the variables that affect a solute's solubility in a solvent. As the water in both tanks A and B is originally pure.

in this instance the solute in tank B will dissolve first due to its larger concentration than in tank A. The concentration gradient between the solute and the water narrows as the solute in tank B dissolves and diffuses into the surrounding water, slowing the rate of dissolution. The solute in tank A will also eventually dissolve, but because of its lower initial concentration, it will do so more gradually.I am unable to tell which solute will dissolve first because the relevant illustration is not given. However, a number of variables, including temperature, pressure, and the chemical makeup of the solute and solvent, affect how soluble a solute is in a solvent. The solute that is more soluble in the given solvent will often dissolve first. It is impossible to predict which solute will dissolve first without more details or context.

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Answer : The ratio of the masses of NH3 to NH4Cl required to make the buffer is 1.6 x 10^4 : 1.

The buffer system is one of the most important chemical systems. They are usually composed of a weak acid and a salt of its conjugate base or a weak base and a salt of its conjugate acid. The buffer capacity is important as it helps to resist changes in pH. The Henderson-Hasselbalch equation can be used to calculate the pH of the buffer system.

It's given by: pH = pKa + log [A-] / [HA]Here, NH3 is the weak base and NH4Cl is the salt of its conjugate acid. NH3 + H2O <--> NH4+ + OH- NH4Cl <--> NH4+ + Cl-By combining the above equations, the ratio of the masses of NH3 and NH4Cl can be found as shown below. pH = pKb + log [salt] / [base] pH = 5.09 + log [NH4Cl] / [NH3]pH = 8.95, pKb of NH3 = 4.74Therefore, 8.95 = 4.74 + log [NH4Cl] / [NH3] 4.21 = log [NH4Cl] / [NH3] [NH4Cl] / [NH3] = antilog (4.21) [NH4Cl] / [NH3] = 1.6 x 10^4

Therefore, the ratio of the masses of NH3 to NH4Cl required to make the buffer is 1.6 x 10^4 : 1.

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The atmosphere, which is represented by Area 1, is the main source of nitrogen on Earth. About 78% of the Earth's atmosphere is made up of nitrogen gas (N2), which is essential to numerous industrial and biological processes.

Sadly, I am unable to give a precise response without access to the question's referenced illustration. I can, however, give some general knowledge about the nitrogen cycle and the various nitrogen reserves on Earth.

The environment contains nitrogen, an element that is necessary for life, in a variety of forms, including nitrogen gas (N2), ammonia (NH3), nitrite (NO2), nitrate (NO3-), and organic nitrogen. A number of biological and chemical mechanisms are used in the nitrogen cycle to change nitrogen's form and transfer it through various reservoirs.

The atmosphere, which contains around 78% nitrogen gas, is the planet's biggest source of nitrogen. Unfortunately, most organisms cannot access atmospheric nitrogen directly; instead, it must be transformed into a useful form through  nitrogen fixation. Nitrogen fixation is the process of converting atmospheric nitrogen into ammonia or other organic nitrogen compounds, which can be taken up by plants and other organisms.

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The organelle that breaks down chemicals in the cell is the lysosome.

Lysosomes are membrane-bound organelles that contain digestive enzymes that are responsible for breaking down various biomolecules, such as proteins, nucleic acids, carbohydrates, and lipids, into their constituent building blocks. These enzymes are able to break down these molecules through hydrolysis, where water is used to break the chemical bonds. Lysosomes play a crucial role in maintaining cellular homeostasis by removing unwanted or damaged cellular components, recycling macromolecules, and its defending against invading microorganisms. Dysfunction of lysosomes can lead to a variety of diseases known as lysosomal storage disorders.

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Answer:

Answer: The final volume of the gas will be 8.07 L.

Approximate number of tubes Amelia can fill = 8.07 L/500 mL = 16.14 tubes.

If the reaction quotient (Q) is smaller than the equilibrium constant (K) for a reaction, then the reaction will proceed towards the right, i.e., in the direction of the products. The correct option is (b).

This is because the forward reaction is favored over the reverse reaction as there is less number of products present, and the system tends to minimize the stress caused by an increase in the number of reactants. Here, stress refers to the difference between Q and K.

In other words, if Q < K, then the system has less number of products than it should at equilibrium. Hence, the reaction proceeds in the forward direction to increase the number of products until Q = K. After this point, the reaction reaches equilibrium, and the rates of the forward and reverse reactions become equal.

In contrast, if Q > K, then the system has more products than it should be at equilibrium. Hence, the reaction proceeds in the reverse direction to decrease the number of products until Q = K. After this point, the reaction reaches equilibrium, and the rates of the forward and reverse reactions become equal.

Therefore, option (b) is the correct answer. The reaction will proceed to the right (product side) if Q is smaller than K.

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The concentrations of A and B in the reaction after a time of about 75 seconds are 0.0465 M.

The initial concentration of AB is 0.290M. The reaction mixture initially contains no products. The reaction time is 75 seconds, and you need to determine the concentration of A and B. The balanced chemical equation of the reaction is as follows: AB → A + B

According to the law of chemical equilibrium, the concentration of products and reactants changes until a state of equilibrium is reached. As a result, the initial concentration of AB decreases, while that of A and B increases by the same amount. At equilibrium, the rate of the forward reaction is the same as the rate of the backward reaction. As a result, the concentration of the reactants and products remains constant for a long period of time, and the reaction has reached equilibrium. As a result, it is important to identify whether or not the reaction has reached equilibrium. The concentration of A and B is calculated using the following formula:

[A] = C₀ - x

[B] = C₀ - x

[AB] = C₀ - x

Here, x is the amount of the substance that has reacted. Since, we know the initial concentration of AB, we can solve for the value of x. We will then use the value of x to compute the concentrations of A and B. For a reaction, the initial concentration of AB is 0.290M. The reaction mixture initially contains no products. The reaction time is 75 seconds, and you need to determine the concentration of A and B.

The given reaction can be balanced as follows: AB → A + B. Let's assume that at equilibrium, the amount of A and B produced is "x."

[AB] = C-x

Let's calculate the equilibrium concentration of AB:

[AB] = C₀ - x = 0.290 M - x

At equilibrium, the concentrations of A and B are equal since they are produced in equal amounts. Using the law of chemical equilibrium, we can construct the equilibrium constant expression for the reaction:

Kc =x²{0.290 - x}

The equilibrium concentration of AB is 0.290 M - x. The equilibrium concentration of A and B is: x². The equilibrium constant expression can be used to find the value of x. Put the value of [AB], [A], and [B] in the formula of equilibrium constant expression: Kc = x²{0.290 - x}

5.26 = x²{0.290 - x}

{x=0.093}

After solving for x, we get the value of 0.093 M. Therefore, the concentration of A and B at equilibrium is:

[A] = [B] = x{2} = {0.093}{2} = 0.0465

Hence, the concentrations of A and B after 75 seconds are 0.0465 M.

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D. Running water at 135 F (57 C) or lower, or a container of water at 135 F (57 C) or lower.

Approximately 5.78 grams of glucose must be consumed to sustain a power output of 25 W for one hour.

Power = Energy/Time

25 W = Energy/3600 s

Energy = 25 W x 3600 s = 90000 J

C6H12O6 + 6O2 → 6CO2 + 6H2O + energy

The energy produced by the complete oxidation of glucose is approximately 2.8 x 10^6 J/mol. Therefore, to produce 90,000 J of energy, we need to divide 90,000 J by the energy produced per mole of glucose:

90,000 J / (2.8 x 10^6 J/mol) = 0.0321 mol

The molar mass of glucose is approximately 180 g/mol. Therefore, the mass of glucose required to sustain a power output of 25 W for one hour is:

0.0321 mol x 180 g/mol = 5.78 g

Power in physics is defined as the rate at which work is done or energy is transferred. It is a scalar quantity that measures how quickly a certain amount of energy is being transferred or converted from one form to another. The standard unit for power is the watt (W), which is equivalent to one joule per second (J/s).

In more mathematical terms, power is given by the formula P = W/t, where P represents power, W represents work, and t represents time. Power is also related to force and velocity through the equation P = Fv, where F represents force and v represents the velocity.

Power is an important concept in physics and engineering, as it is used to describe the performance of machines, engines, and other energy conversion systems. The greater the power of a system, the more work it can do in a given amount of time, and the faster it can accomplish a task.

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The standard reduction potential of the cathode half-reaction is -0.36V,

The standard reduction potential of the anode half-reaction is +0.34V,

and the standard potential of the cell is -0.02V.

The cathode half-reaction is the reduction of iron (Fe²⁺) to iron (Fe):

Fe²⁺ + 2e⁻ -> Fe; E°cathode = -0.36V.

The anode half-reaction is the oxidation of copper (Cu) to copper (Cu²⁺):

Cu -> Cu²⁺ + 2e⁻; E°anode = +0.34V.
The standard potential of the cell is determined by subtracting the standard reduction potential of the anode from the standard reduction potential of the cathode:

E°cell = E°cathode - E°anode

= -0.36V - (+0.34V)

= -0.02V.

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Answer:

Explanation: If the red litmus paper is inserted into the solution and the color remains unchanged, it indicates that the solution is likely a neutral solution or a solution with a pH close to 7. This means that it may contain either water or a salt solution.

To further confirm whether the solution contains a salt or water, we can perform a simple test using blue litmus paper. We can dip a blue litmus paper into the solution, and if it turns red, it indicates that the solution is acidic. If it remains blue, it indicates that the solution is basic.

If the blue litmus paper also does not change its color, it means that the solution is neutral or has a pH close to 7, which supports the possibility that the solution may contain either water or a salt solution.

To further test whether the solution contains a salt or not, we can perform a flame test. We can take a small amount of the solution and place it on a platinum wire loop and hold it in a Bunsen burner flame. If the flame produces a characteristic color, it indicates that the solution contains a salt. The characteristic color of the flame will depend on the metal ion present in the salt.

Overall, based on the initial test with the red litmus paper, the solution is likely neutral or close to neutral, and additional tests with blue litmus paper and flame test can be used to confirm whether the solution contains a salt or water.

At the resting membrane potential, the membrane is most permeable to potassium ions (K+), which move out of the cell due to its concentration gradient and the negative charge inside the cell.  Correct answer is option: E.

This movement of K+ ions out of the cell contributes to the negative resting membrane potential of approximately -70 mV in most cells.  The resting membrane potential is maintained by the selective permeability of the cell membrane, which allows for the movement of certain ions across the membrane. In general, the membrane is less permeable to sodium (Na+) and chloride (Cl-) ions at rest, and the movement of these ions across the membrane is limited. Thus, option E "potassium" is the correct answer.

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Answer:

To calculate the molarity of a calcium carbonate (CaCO3) solution, we first need to convert the volume of water from milliliters (mL) to liters (L).

Volume of water = 125 mL = 0.125 L

Next, we need to use the number of moles of CaCO3 and the volume of water to calculate the molarity:

Molarity = number of moles / volume of solution

Molarity = 2.00 mol / 0.125 L

Molarity = 16.0 M

Therefore, the molarity of the calcium carbonate solution is 16.0 M. However, it's important to note that this concentration is not physically possible as the solubility of calcium carbonate in water is relatively low. Therefore, it's likely that the amount of calcium carbonate that actually dissolves in 125 mL of water is much less than 2.00 moles, making the actual molarity much lower.

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When flour is mixed with water, an elastic network forms as gliadin and glutenin combine, and this is known as gluten. It is both elastic and plastic and can expand with the inner pressure of gases (air, steam, and co2), allowing the bread to expand with the action of yeast.

Gluten is a mixture of two proteins, gliadin and glutenin, which gives wheat dough its elastic and viscoelastic properties. When flour is mixed with water, the gluten forms an elastic network that can expand with the inner pressure of gases (air, steam, and CO2). This allows bread to rise with the action of yeast, making it light and fluffy. Gluten is also responsible for the chewy texture of bread and other baked goods that use wheat flour.

Gluten is found in wheat, barley, and rye. People with celiac disease or gluten intolerance are unable to digest gluten, and consuming it can cause a range of symptoms, including diarrhea, bloating, and abdominal pain. As a result, they must follow a gluten-free diet. Gluten-free flours made from rice, corn, and other grains can be used as a substitute for wheat flour in many recipes.

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To titrate a solution containing 0.355 g of sodium oxalate, 0.0234 L of 0.0100 M KMnO₄ is needed.

Titration is a technique used in analytical chemistry to determine the concentration of a specific analyte. The method involves the gradual addition of a standard solution to a sample containing the unknown analyte until the chemical reaction between the two is complete. The concentration of the unknown analyte can be calculated once this happens.

The balanced equation for the reaction between Na₂C₂O₄ and KMnO₄ is shown below:

5Na₂C₂O₄ + 2KMnO₄ + 8H₂SO₄ → 2MnSO₄ + 10CO₂ + 5Na₂SO₄ + 8H₂O

To titrate the given sodium oxalate solution, the volume of KMnO₄ needed must be determined. The molar mass of Na₂C₂O₄ is 134.00 g/mol.

Mass of Na₂C₂O₄ = 0.355 g

Moles of Na₂C₂O₄ = (0.355 g)/(134.00 g/mol) = 0.00265 mol

From the balanced equation, it can be seen that 2 moles of KMnO₄ are required to react with 5 moles of Na₂C₂O₄. As a result, the number of moles of KMnO₄ needed can be calculated.

Moles of KMnO₄ = (2/5) × 0.00265 mol = 0.00106 mol

The volume of 0.0100 M KMnO₄ needed can now be determined using the molarity equation.

Molarity (M) = moles (n) / volume (V)

n = M × V

V = n / M = 0.00106 mol / 0.0100 M = 0.106 L = 0.0234 L (to three significant figures)

Therefore, to titrate a solution containing 0.355 g of sodium oxalate, 0.0234 L of 0.0100 M KMnO₄ is needed.

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The net ionic equation for the reaction between [tex]Ba(OH)_2(aq) and H_2SO_^4 (aq)  is :2Ba^2^+(aq) + SO_4^2^-(aq) + 2H^+(aq) ⇒ 2Ba^2^+(aq) + 2H_2O[/tex]

When the following two solutions are mixed:

[tex]K_2CO_3(aq) + Fe(NO_3)_3(aq)[/tex], the mixture contains the following ions:

[tex]NO_3- (aq), Fe^3+, CO_3^ 2-, K^+[/tex]. The spectator ions are NO3- (aq) and K+, and the ions that react are Fe3+ and CO3 2-.

Hence , The correct net ionic equation, including all coefficients, charges, and phases, for the reactants [tex]Ba(OH)_2(aq) + H_2SO_4(aq) [/tex] is 2Ba^2^+(aq) + SO_4^2^-(aq) + 2H^+(aq) ⇒ 2Ba^2^+(aq) + 2H_2O[/tex] .
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The answer is C) 0.5 kg. This is because Plutonium-238 has a half-life of 87.7 years, which means that after 87.7 years, half of the original amount of Plutonium-238 will remain. In this case, that would be 2 kg * 0.5 = 0.5 kg.

Plutonium-238 is a radioactive element used as a power source in spacecraft like Voyager and New Horizons. It has a half-life of 87.7 years. Suppose we have 2 kg of plutonium-238 right now. Radioactive decay is a random event. So, it is impossible to predict when a specific atom will decay. But we can find how much radioactive material is remaining after a specific period of time.

The half-life of a radioactive material is the time required for half of the radioactive material to decay. The formula to calculate the remaining material is:

N(t) = N0 × (1/2)^(t/t1/2)

Where N(t) is the remaining material at time t, N0 is the initial material, t1/2 is the half-life, and t is the elapsed time.

The initial material is 2 kg, half-life is 87.7 years, and the elapsed time is also 87.7 years.

N(87.7) = 2 kg × (1/2)^(87.7/87.7)= 1 kg × 0.5= 0.5 kg

Therefore, the amount of plutonium remaining after 87.7 years will be 0.5 kg. So, the answer is option C.

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Answer:

Cobalt, Nickel, Chromium, and Copper