when a compound is dissolved in hot ethanol during a recrystallization, what is changing on a molecular level?

Answer:

biosphere

You can even double check on g00gle.

Answer:

Chemical potential energy being converted to kinetic energy

Explanation:

Explanation:

The general formula of an alkane is given as;

        CₙH₂ₙ₊₂

n is the number of the member;

 For the 97th member in the series;

 n  = 97;

 2n + 2  = 2(97) + 2  = 196

So, the 97th member is;

                C₉₇H₁₉₆

This is how to apply the formula of alkanes which are saturated hydrocarbons to find any member of the series.

When 156.32 g of barium hydroxide is reacted, approximately 142.34 g of aluminum hydroxide can be produced, based on the balanced chemical equation and stoichiometry.

To determine the amount of aluminum hydroxide that can be produced when 156.32 g of barium hydroxide is reacted, we need to consider the balanced chemical equation for the reaction and use stoichiometry.

The balanced chemical equation for the reaction is:

Ba(OH)2 + 2AlCl3 → 2Al(OH)3 + 3BaCl2

From the balanced equation, we can see that for every 1 mole of Ba(OH)2, 2 moles of Al(OH)3 are produced.

First, we need to calculate the number of moles of barium hydroxide (Ba(OH)2) in 156.32 g:

Molar mass of Ba(OH)2 = (137.33 g/mol + 2(16.00 g/mol + 1.01 g/mol)) = 171.34 g/mol

Moles of Ba(OH)2 = mass / molar mass = 156.32 g / 171.34 g/mol = 0.911 mol

Now, using the stoichiometry of the balanced equation, we can determine the moles of aluminum hydroxide (Al(OH)3) produced:

Moles of Al(OH)3 = 2 × Moles of Ba(OH)2 = 2 × 0.911 mol = 1.822 mol

Finally, to convert the moles of aluminum hydroxide to grams, we need to multiply by the molar mass of Al(OH)3:

Molar mass of Al(OH)3 = (26.98 g/mol + 3(16.00 g/mol + 1.01 g/mol)) = 78.00 g/mol

Mass of Al(OH)3 = Moles of Al(OH)3 × molar mass = 1.822 mol × 78.00 g/mol = 142.34 g

Therefore, when 156.32 g of barium hydroxide is reacted, approximately 142.34 g of aluminum hydroxide can be produced.

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Answer:

Gene - determines the trait (phenotype)

The pillar of sustainability broken by recycling electronics in India is environmental sustainability. Implementing a law that restricts electronics recycling to the US would not necessarily be the most effective solution, as it overlooks the complex global dynamics of electronic waste management.

Recycling electronics in India often involves improper disposal methods, such as burning or dismantling without proper safety measures. This leads to environmental pollution, including the release of hazardous substances into the air, soil, and water, thus violating the principle of environmental sustainability.

However, simply mandating that electronics can only be recycled in the US may not be the most optimal solution. Electronic waste is a global issue, and restricting recycling to a single country disregards the fact that electronic products are manufactured and consumed worldwide. A more comprehensive approach to addressing electronic waste would involve international cooperation, strict regulations, and monitoring of recycling practices to ensure they meet environmental standards.

Efforts should focus on improving recycling practices globally, including promoting responsible electronic waste management, developing sustainable recycling infrastructure in multiple countries, and encouraging the adoption of safe and environmentally friendly recycling practices. This approach would foster global sustainability and address the challenges associated with electronic waste disposal more effectively than a geographically limited restriction.

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Answer:

B 6NO  A 5N2  C 6H2O  D 4Nhd

Explanation:

Answer: B. Shared electrons

Explanation: Electrons are shared in covalent bonds. The other options are all properties of metallic bonds.

Answer:

0.5667 M ≅ 0.57 M.

Explanation:

It is known that the no. of millimoles of a solution before dilution is equal to the no. of millimoles of the solution after the dilution.

It can be expressed as:

(MV) before dilution = (MV) after dilution.

M before dilution = 1.5 M, V before dilution = 340 mL.

M after dilution = ??? M, V after dilution = 340 mL + 560 mL = 900 mL.

∴ M after dilution = (MV) before dilution/(V) after dilution = (1.5 M)(340 mL)/(900 mL) = 0.5667 M ≅ 0.57 M.

Answer:

Explanation:

The distance covered by an object given it's velocity and time taken can be found by using the formula

From the question

velocity = 290 miles/hour

time = 3 hours

The distance between the two cities is

distance = 290 × 3

We have the final answer as

Hope this helps you

Answer:

Option D

Explanation:

Ionization energy increases left to right in a period and decreases top to bottom in a groups.

Ar is in Group 13

S is in Group 15

P is in Group 16

Al is in Group 18

They are all in the same period so decide by the group numbers if left is the highest (group 18) and right (group 13) is the lowest.

The order: Ar, S, P, Al

Hope this is clear. Good luck with chemistry! :)

Protecting Groups for Amines:

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Answer:

The type of Chemistry that studies the chemical reactions that occur in the human body, is Biochemistry.

Explanation:

That is true ofcourse so yes

Answer:

D) Sun's heat

Explanation:

The water cycle is driven primarily by the energy from the sun. This solar energy drives the cycle by evaporating water from the oceans, lakes and rivers.

Answer:

D) sun's heat

Explanation:

The sun's heat provides enough energy to water molecules at the surface so they move fast enough to escape from the water. The water does not need to boil.

an experiment where a Gummy Bear is sacrificed for the sake of science The 2nd part of the experiment involves tossing a Gummy Bear into molten potassium chlorate. As a result, the sucrose reacts with oxygen and generates purple sparks and a lot of heat and The balanced reaction looks like :

C₁₂H₂₂O₁₁ (s) + 8KClO₃ (s) =  12CO₂ (g) + 11H₂O (g) + 8KCl (s)

When the potassium chlorate is heated, it decomposes into potassium chloride and oxide, as seen below:

2KClO₃(s) =  2KCl(s) + 3O₂(g)

When the gummy bear is dropped, the oxide from the decomposition of potassium chlorate reacts with the glucose molecule in sucrose. This reaction is a spontaneous combustion reaction:

C₆H₁₂O₆ (s) + 6O₂(g) = 6CO₂(g) + 6H₂O (g)

The overall reaction is seen below:

C₁₂H₂₂O₁₁ (s) + 8KClO₃ (s) =  12CO₂ (g) + 11H₂O (g) + 8KCl (s)

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Strong acids and bases dissociate dissolve completely in water. therefore, they are classified as electrolytes.

What do the body's electrolytes do?

Your body contains electrolytes, which are minerals with an electric charge. They can be found in various bodily fluids such as urine, tissues, and blood.

                 Electrolytes are crucial because they: Maintain a healthy balance of bodily fluids. Achieve pH balance throughout your body. The important electrolytes are sodium, potassium, chloride, magnesium, calcium, phosphate, and bicarbonates.

What transpires if your body is deficient in electrolytes?

The activities of your body, including blood coagulation, muscle contractions, acid balance, and fluid control, might be hampered when your body's electrolyte levels drop.

                                   Since your heart is a muscle, electrolytes aid in controlling your heartbeat.

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A chemical equation must be balanced. this means that the same number and type of atoms must appear on both sides of the equation .

In other words, both sides of the reaction have an equal balance of mass and charge. The amount and types of atoms on both sides of the reaction arrow must match for the chemical equation to be balanced.

To comply with the law of conservation of mass, which stipulates that matter cannot be generated or destroyed in a closed system, chemical equations must be balanced.

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Answer:

Strongly basic

Explanation:

pH is a measure of the acidity or basicity of a solution, with values ranging from 0 to 14. A pH of 7 is considered neutral, values below 7 indicate acidity, and values above 7 indicate basicity. As pH increases beyond 7, the basicity of the substance becomes stronger.

Use this pH Scale to further aid you in your studies of Acid Base Chem :)

Answer:

8000 kilogram/cubic meter

Explanation:

I used an online calculator.

Hope I helped!

Chemically active fluids primarily aid in the mobility of dissolved silicate components and facilitate the development of the mineral grains during metamorphism.

During metamorphism, chemically active fluids that are present between the mineral grains help to promote ion movement and the re-crystallization of both old and new minerals.

Rocks that have undergone metamorphism include igneous, sedimentary, and other types of metamorphic rocks. The variations include the creation of new minerals, an increase in grain size, and adjustments to the structure or texture of the rock, depending on the chemical composition of the original rock and the degree of metamorphism.

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When administering multiple medications to a client with an enteral feeding tube, the nurse should take several precautions to ensure the safe and effective delivery of the drugs.

Firstly, the nurse should flush the tube with 15 mL of sterile water before administering any medications to clear any residual feedings or other substances from the tube. Secondly, each medication should be dissolved in at least 30 mL of warm sterile water to prevent clogging and ensure that the medication is delivered properly. Thirdly, medications should be drawn up separately to avoid any potential interactions or incompatibilities between different drugs. Finally, if the nurse encounters resistance when administering medications, they should stop and contact the provider for further instructions. By following these guidelines, the nurse can help ensure that the client receives the full therapeutic benefit of each medication while minimizing the risk of adverse effects or complications.

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After acid was added to the solution and the hydronium ion concentration becomes 100 times greater, the pH of the new solution is 5.

The pH of a solution is defined as the logarithm of the reciprocal of the hydrogen ion concentration  [H+] of the given solution.

It is expressed as;

pH = -log[ H⁺]

Given that;

pH = -log[ H⁺]

H⁺ = 10^( -pH )

H⁺ = 10^( -7 )

H⁺ = 10⁻⁷

When acid is added to the solution, the hydronium ion concentration becomes 100 times greater.

H⁺ = 10⁻⁷ × 100

H⁺ = 10⁻⁵

pH of the new solution will be;

pH = -log[ H⁺ ]

pH = -log[ 10⁻⁵ ]

pH = 5

Therefore, after acid was added to the solution and the hydronium ion concentration becomes 100 times greater, the pH of the new solution is 5.

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Answer:

Water molecules forming hydrogen bonds with one another. The partial negative charge on the O of one molecule can form a hydrogen bond with the partial positive charge on the hydrogens of other molecules. Water molecules are also attracted to other polar molecules and to ions.

Explanation:

The energy associated with the annihilation of a positron and an electron is approximately 2.7416 × 10⁻⁸ kilojoules per mole.

When a positron and an electron annihilate each other, their combined mass is completely converted into energy according to Einstein's mass-energy equivalence principle (E=mc²). To calculate the energy associated with this process in kilojoules per mole (kJ/mol), we need to determine the mass of the positron-electron pair and then apply the appropriate conversion factors.

The mass of an electron is approximately 9.10938356 × 10⁻³¹ kilograms, and since the positron has the same mass, the combined mass of the pair is twice that value. To convert this mass to moles, we need to divide it by Avogadro's number, which is 6.022 × 10²³ particles/mol.

Now, to calculate the energy associated with the annihilation process, we can use the equation E=mc². The mass of the positron-electron pair is multiplied by the square of the speed of light, c, which is approximately 2.998 × 10⁸ meters per second.

Therefore, the energy associated with the annihilation of a positron and an electron can be calculated as follows:

Energy (E) = (2 * mass of electron) * (speed of light)²

Substituting the known values and performing the calculation, we find:

E = (2 * 9.10938356 × 10⁻³¹ kg) * (2.998 × 10⁸ m/s)²

Finally, convert the energy to kilojoules per mole by dividing by Avogadro's number:

Energy (E) = [(2 * 9.10938356 × 10⁻³¹ kg) * (2.998 × 10⁸ m/s)²] / (6.022 × 10²³ particles/mol)

= 2.7416 × 10⁻³⁶ kg m²/s²/particles * mol

To convert this energy to kilojoules per mole, we need to multiply by the conversion factor. The conversion factor is given by 1 J/mol = 1 kg m²/s²/mol. Additionally, 1 kJ = 1000 J.

Energy (E) = (2.7416 × 10⁻³⁶ kg m²/s²/particles * mol) * (1 J/mol / 1 kg m²/s²) * (1 kJ / 1000 J)

= 2.7416 × 10⁻³⁶ * 10⁻³ * 10⁻³ kJ/mol

= 2.7416 × 10⁻⁸ kJ/mol

Therefore, the energy associated with the annihilation of a positron and an electron is approximately 2.7416 × 10⁻⁸ kilojoules per mole.

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The volume of dinitrogen pentoxide gas that can be synthesized is 5.08 liters.

To determine the volume of dinitrogen pentoxide (N2O5) gas that can be synthesized, we need to use the balanced chemical equation for the reaction between nitrogen gas (N2) and oxygen gas (O2) to form dinitrogen pentoxide.

The balanced equation is:

N2(g) + 2O2(g) → 2N2O5(g)

From the equation, we can see that the mole ratio between nitrogen gas and dinitrogen pentoxide is 1:2. This means that for every 1 mole of nitrogen gas, we will produce 2 moles of dinitrogen pentoxide.

First, we need to calculate the number of moles of nitrogen gas and oxygen gas present:

Moles of nitrogen gas = volume of nitrogen gas / molar volume of nitrogen gas at STP

Moles of nitrogen gas = 2.54 L / 22.4 L/mol = 0.1134 moles

Moles of oxygen gas = volume of oxygen gas / molar volume of oxygen gas at STP

Moles of oxygen gas = 1.83 L / 22.4 L/mol = 0.0817 moles

Since the mole ratio between nitrogen gas and dinitrogen pentoxide is 1:2, the limiting reactant is nitrogen gas because it has fewer moles.

According to the balanced equation, 1 mole of nitrogen gas produces 2 moles of dinitrogen pentoxide. Therefore, the number of moles of dinitrogen pentoxide produced is 2 times the number of moles of nitrogen gas:

Moles of dinitrogen pentoxide = 2 × moles of nitrogen gas

Moles of dinitrogen pentoxide = 2 × 0.1134 moles = 0.2268 moles

Finally, we can calculate the volume of dinitrogen pentoxide gas using the molar volume at STP:

Volume of dinitrogen pentoxide gas = moles of dinitrogen pentoxide × molar volume of dinitrogen pentoxide gas at STP

Volume of dinitrogen pentoxide gas = 0.2268 moles × 22.4 L/mol = 5.08 L

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Answer:

There is one carbon atom in every carbon tetrachloride molecule, which means that there is an equal number of carbon atoms to carbon tetrachloride molecules. 5.089 x 1022 atoms of C.

Explanation:

Hope this helped, Have a Wonderful Day!!

The values of balanced chemical reaction is w = 1, x = 6, y = 3, and z = 2

To balance the chemical equation:

1. Balancing nitrogen (N):

There are three nitrogen atoms on the left side (Ba₃N₂), so we need to place a coefficient of 3 in front of NH₃:

w Ba₃N₂ + x H₂O → y Ba(OH)₂ + 3 z NH₃

2. Balancing hydrogen (H):

There are six hydrogen atoms on the left side (2 × 3), so we need to place a coefficient of 6 in front of H₂O:

w Ba₃N₂ + 6 H₂O → y Ba(OH)₂ + 3 z NH₃

3. Balancing barium (Ba):

There are three barium atoms on the left side (3 × Ba₃N₂), so we need to place a coefficient of 3 in front of Ba(OH)₂:

w Ba₃N₂ + 6 H₂O → 3 y Ba(OH)₂ + 3 z NH₃

4. Balancing oxygen (O):

There are six oxygen atoms on the right side (6 × OH), so we need to place a coefficient of 3 in front of Ba(OH)₂:

w Ba₃N₂ + 6 H₂O → 3 Ba(OH)₂ + 3 z NH₃

Now the equation is balanced with the following coefficients:

w Ba₃N₂ + 6 H₂O → 3 Ba(OH)₂ + 3 z NH₃

Therefore, w = 1, x = 6, y = 3, and z = 2 would satisfy the balanced chemical equation.

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Answer:

5.813 mL

Explanation:

You need to use the formula : vol = mass / molar mass x molarity

the molar mass of HCl is 36.46 and the problem gives you the rest of the equation

0.251M x 36.46 = 9.151

53.2g / 9.151 = 5.813 mL

*I don't know some of the units so that's why some of them are blank sorry

*I'm also sorry if this is wrong but it's what I did so..