Shelton measures a temperature of a solution to be 20O degrees C and stirs 5 grams of a substance into the solution. this substance disappears and 10 minutes later the substance of the solution is 80O degrees C.
based on his observation, can Shelton conclude a chemical reaction has occurred?

A) yes because the substance dissolved in the solution

B) no because the volume of the solution did not change

C) no because there are no color changing solution

D) yes because heat was produced

If the given word equation is rewritten as a balanced chemical equation, the coefficient for fluorine will be 3 and the symbol for fluorine will be F.

A balanced chemical equation is one in which the number of atoms of each element on the left side of the equation is equal to the number of atoms of each element on the right side of the equation. In the case of the given equation, the balanced chemical equation would be:

N2 + 3F2 → 2NF3

In this equation, the coefficient for fluorine (F2) would be 3 and the symbol for fluorine would be F. This means that there are three molecules of fluorine present in the reaction, and the symbol for fluorine is F.

In summary, if the given word equation is rewritten as a balanced chemical equation, the coefficient for fluorine will be 3 and the symbol for fluorine will be F.

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Answer: electrostatic force

Explanation:

Oppositely charged particles attract each other. This attractive force is often referred to as an electrostatic force. An ionic bond is the electrostatic force that holds ions together in an ionic compound

The atoms and ions that are paramagnetic are [tex]Mn^{2+}[/tex] and Sn and the atoms and ions that are diamagnetic are [tex]Al^{3+}[/tex] and Zn.

Paramagnetic ions or atoms are when the ions or atoms have at least one unpaired electron. Diamagnetic ions or atoms are when the atoms or ions don't have any unpaired electrons.

To find if the ions have unpaired electrons or not, we must write electron configuration. So,

For [tex]Mn^{2+}[/tex] electron configuration is [tex][Ar]3d^54s^0[/tex], it is paramagnetic.

For [tex]Al^{3+}[/tex] electron configuration is [tex][He]2s^22p^63s^03p^0[/tex], it is diamagnetic.

For Zn electron configuration is [tex][Ar]3d^{10}4s^2[/tex], it is diamagnetic.

For Sn electron configuration is [tex][Kr]4d^{10}5s^25p^2[/tex], it is paramagnetic.

Your question is incomplete, but most probably your full question was

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Answer:

Explanation:

Nitrogen and oxygen are important components of the atmosphere because they are essential for life on Earth.

Nitrogen makes up about 78% of the Earth's atmosphere by volume, and it is an important component of proteins, nucleic acids, and other biomolecules. It is also a vital component of the Earth's nitrogen cycle, which is the process by which nitrogen is converted into various forms and transported through the environment.

Oxygen makes up about 21% of the Earth's atmosphere by volume, and it is essential for respiration and the production of energy in living organisms. It is also a key component of the Earth's carbon cycle, which is the process by which carbon is exchanged between living organisms, the atmosphere, and the Earth's surface.

Together, nitrogen and oxygen play important roles in the functioning of the Earth's ecosystems and the support of life on the planet.

The correct sorting function to list Colors in alphabetical order is Ascending.

The value would be returned based on the formula in Cell A49 is 4.

A function is simply the code that one can use over and over again, rather than writing it out multiple times. In this case, it'll be illustrated in an ascending order.

Also, the formula: =COUNTIF(range;"*"). Range is defined cell range where you want to count the text in Excel and wildcard * is criteria for all text occurrences in the defined range.

The answer is 4, there were four instances of Np in the given range of five cells.

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The freezing point of aqueous solution containing 18 gram of c6 h12 o6 in thousand gram of water is -1.76°C.

Aqueous solution is a solution created by dissolving a solid, liquid, or gaseous substance in water. Water is the most common solvent used to create aqueous solutions, and it is universal solvent due to its chemical properties. Aqueous solutions are a common form of solution found in every day life, such as in household cleaners, cooking ingredients, and even medication. Aqueous solutions are incredibly useful and versatile, as they can be easily manipulated with other substances to create various different solutions.

This is because the freezing point depression of a solution is proportional to the amount of solute present. The freezing point depression for a 1 molar solution of glucose is 1.86°C, so the freezing point of a solution containing 18 grams of glucose in 1000 grams of water is calculated as 1.86°C x (18/180) = -1.76°C.

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If protons (H+) were able to freely move across the mitochondrial membrane, cellular respiration will not occur.

Mitochondria are encased in a double-membrane system made up of inner and outer mitochondrial membranes separated by an intermembranous space. The inner membrane has numerous folds (cristae) that extend into the organelle's interior. In the critical process of oxidative phosphorylation, the electrochemical proton gradient across the inner mitochondrial membrane drives ATP synthesis. This is made possible by the previously mentioned membrane-bound enzyme ATP synthase.

The electron transport chain creates a proton gradient across the inner mitochondrial membrane, causing chemiosmosis to drive ATP synthesis. The proton gradient across the cristae membrane is produced by three large membrane protein complexes of the respiratory chain in the cristae, known as complexes I (NADH/ubiquinone oxidoreductase), III (cytochrome c reductase), and IV (cytochrome c reductase) (cytochrome c oxidase).

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0.25 moles of O2 is needed to produce 14.2 grams of P4O10 from P.

In order to calculate the number of moles of O2 needed to produce 14.2 grams of P4O10 from P, we need to use the equation for the reaction:

P + 5O2 → P4O10

We can calculate the number of moles of O2 needed by using the molar mass of P4O10, which is 284 g/mol. First, we need to calculate the number of moles of P4O10 present in 14.2 grams:

14.2 g/ 284 g/mol

= 0.05 mol.

Now, we can use the mole ratio between P and O2 to calculate the number of moles of O2 needed. The mole ratio is 5:1, meaning that for every 5 moles of O2, 1 mole of P is needed. Therefore, to get 0.05 moles of P4O10 from P, we need 0.05 x 5 = 0.25 moles of O2.

In conclusion, 0.25 moles of O2 is needed to produce 14.2 grams of P4O10 from P.

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4 liters of the 70% solution are required by the chemist.

8 liters of saline solution divided by 25%

Saline solution at 25% = 0.25 x 8 = 2 liters

Let there be x liters of saline solution at 70%.

Salt = 8 plus x

40% of salt is equal to 25% of saline solution plus 70% of saline solution.

2 + (70/100)x = (40/100)(8 + x)

2 + 0.7x = 0.4(8 + x)

2 + 0.7x = 3.2 + 0.4x

0.7x - 0.4x = 3.2 - 20.3

x = 1.2

x = 1.2 / 0.3

x = 4

4 liters of the 70% solution are required by the chemist.

The following equation can be used to determine the volume or concentration of a concentrated or diluted solution: M1V1 = M2V2.

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The components of the box model is transparent and does not take a background color is Margin

Whatever color is allocated to the container that the elements are in will be used as the margin color. Therefore, simply set the parent element's color as needed.

It requires a background color because the margin is completely transparent and lacks a background color. It is made clear what area the piece is in.

It is the area surrounding a component. On a page, margins can be used to move an element left, right, up, and down.

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Explains other concepts such as molecules and reactions.

Explanation: Bond parameters, covalent compounds, hybridisation, hydrogen bonding, ionic or electrical ent compounds, and resonance structures

20% NaCl is hypertonic.

What is hypertonic solution?

A hypertonic solution is any external solution that has a high solute content and a low water concentration compared to body fluids. In a hypertonic solution, water will often transfer from the body into the solution.

A solution that is hypertonic includes more solute particles (such as salts and other electrolytes) is frequently found in blood plasma and cells. Osmotic pressure of the interior of cell is equals to 0.9 % NaCl solution, which is called physiological saline.

Therefore, 20% NaCl is hypertonic.

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The four main sectors that contribute to carbon emissions are Energy, Industrial Processes, Agriculture, and waste.

These four sectors are responsible for the majority of GHG emissions globally. Reducing emissions in these sectors is essential for mitigating climate change and achieving net-zero emissions. This can be done through a variety of measures, such as increasing energy efficiency, transitioning to renewable energy sources, adopting more sustainable land use practices, and reducing waste.

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For N2 at 298 K, 0.071 fraction of molecules has a speed between 200 and 300 m/s.

Molecular speed is defined as the speed of a group of molecules in an ideal gas. The concept of molecular speed is critical in gas kinetic theory. According to the kinetic theory of gases, the molecules of a gas are constantly moving and follow a straight route until they collide with another molecule.

The speed of molecules in a gas is proportional to temperature and inversely proportional to the molar mass of the gas. In other words, when the temperature of a gas sample rises, the molecules accelerate, and so does the root mean square molecular speed. To determine a molecular speed, multiply three times the gas constant by the temperature, divide by the molar mass, and then square the result.

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The ksp for silver sulfate if the solubility of ag2so4 in pure water is 4.5 g/l is 1.2x10-5.

The Ksp is the solubility product, which is the product of the ions increased to their coefficients. This is based on the chemical equation's mole ratio. The stoichiometry of the dissolving reaction influences the relationship between solubility and solubility product constant. When two ionic compounds share an ion, the solubility of a sparingly soluble ionic material is considerably reduced in a solution of another ionic molecule.

The equilibrium constant for the dissolving of a solid material into an aqueous solution is the solubility product constant. It's represented by the symbol Ksp. The solubility product is a type of equilibrium constant whose value varies with temperature.

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Answer: He thought that all materials on Earth were not made of atoms, but of the four elements, Earth, Fire, Water, and Air.

Explanation: Aristotle did not believe in the atomic theory and he taught so otherwise. He thought that all materials on Earth were not made of atoms, but of the four elements, Earth, Fire, Water, and Air. He believed all substances were made of small amounts of these four elements of matter.

Carbohydrates require carbon as their primary component. There is carbon in every known carbohydrate. All carbohydrates also contain hydrogen and oxygen atoms, with the exception of a few simple sugars, which only contain carbon and hydrogen atoms.

Carbon, hydrogen, and oxygen atoms make up the macromolecules known as carbohydrates. They are a significant energy source. They can be found in fruits and vegetables as sugars, starches, and fibre. What categories do the carbs fit into? Starchy meals are complex carbohydrates because they include two or more sugar units. Compared to simple carbs, complex carbohydrates' molecules digest and transform more slowly. They are widely distributed in whole-grain bread, cereals, lentils, beans, peanuts, potatoes, peas, and corn. As one of the three primary macronutrients, carbohydrates are one of the three.

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If sanitizer is added to the water, it won't be enough to adequately eliminate the microorganisms that cause foodborne disease. If there is an excessive amount of sanitizer added to the water, it may dry on dining tables and kitchen countertops.

Using test strips, verify that the sanitizer is neither either too strong or too weak. The sanitising combination should only receive the precise amount of water.

Over time, a chlorine bleach sanitising solution starts to lose part of its effectiveness. The sanitising solution must therefore be evaluated using test strips.

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The protic solvents include NH3, HCONH2, and (CH3)2CHOH.

The aprotic solvents include N(CH3)3, CH3NO2, and CH2Cl2.

An oxygen (O), nitrogen (N), or fluoride atom is bonded to a hydrogen atom in a protic solvent (F). Protic solvents are generally any solvents that have a labile H+.

(CH3) (CH3) Because one of the hydrogens in 2CHOH is linked to oxygen, it is a protic solvent (O)

CH3NO2 is an aprotic (i.e not a protic solvent) solvent because all the hydrogens are bound to carbon.

CH2Cl2 is an aprotic solvent because all the hydrogens are bound  tocarbon.

NH3 is a protic solvent because all the hydrogens are bound to Nitrogen (N)

N(CH3)3 is an aprotic solvent because all the hydrogens are bound to carbon

HCONH2 is a protic solvent because two of the hydrogens are bound to Nitrogen (N)

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complete question:

Classify each solvent as protic or aprotic. a. (CH3)2CHOH c. CH2Cl2 e. N(CH3)3 b. CH3NO2 d. NH3 f. HCONH2

Answer:

inner transition elements.

Explanation:

right answer

Answer:

2

Mg has a molar mass of 24.3 g/mol. Hence, the number of atoms of Mg in 1.00 g is 2.

2.47 x [tex]10^{22}[/tex] atoms are there in 1.00 g. In chemistry, atoms are the fundamental building blocks of matter.

Atoms are the fundamental constituents of matter and the smallest units of an element that nevertheless retain its chemical characteristics. As they come together to create molecules, which then give rise to more complex structures, atoms are the subject of research in chemistry. Protons, neutrons, and electrons are the three primary subatomic particles that make up an atom. Neutrons have no charge, protons have a positive charge, and electrons have a negative charge. The quantity of protons determines an element's atomic number and establishes its identity.

Number of moles of Mg = (1.00 g) / (24.305 g/mol)

                                       = 0.0411 mol

Number of atoms = (0.0411 mol) x (6.022 x [tex]10^{23 }[/tex]atoms/mol)

                           = 2.47 x [tex]10^{22}[/tex] atoms

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Answer:

A

Explanation:

"Nonmetals tend to be gases or liquids at room temperature and are found on the right side of the table."

This can be observed using a labelled periodic table.

Answer:

If an element has 3 valence electrons, it means that it can form chemical bonds with other atoms by sharing or transferring those 3 valence electrons. The resulting compound will have a chemical formula and properties that depend on the specific elements involved in the bonding and the arrangement of the atoms in the compound. Some elements with 3 valence electrons include boron (B), aluminum (Al), and phosphorus (P). These elements are commonly found in compounds such as borax (Na2B4O7), alum (KAl(SO4)2), and phosphoric acid (H3PO4), respectively.

The rate constant of a first-order reaction is 0.145 s⁻¹. The rate constant of the second-order reaction is 1.322  M⁻¹s⁻¹.

The rate of reaction can be demonstrated as the speed at which the products in a chemical reaction are produced from the reactants. Rate gives information on how much time is required for the reaction to be completed.

The rate of reaction can be defined as the speed of a reaction at which reactants are converted into products. Some reactions can be instantaneous, while some take a little longer to achieve the final equilibrium.

Given, the reaction is A → B

Given, the rate of reaction = 1.6 × 10⁻² M/s

The initial concentration of reactant A = 0.11 M

The rate constant of first-order reaction, Rate = k [A]

1.6 × 10⁻² = k ×0.11

k = 0.145 s⁻¹

The rate constant of second-order reaction, Rate = k [A]²

1.6 × 10⁻² = k ×(0.11)²

k' = 1.322  M⁻¹s⁻¹

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In a control experiment, to validate the amount of HCl neutralized by an antacid, at the end of experiment antacid would not be present.

The following net-ionic equation describes how a strong acid and a strong base react together: H₃O⁺(aq) + OH⁻(aq) → 2H₂O(l). The pH of the resulting solution can be calculated from the concentration of the excess reactant if either the acid or the base is in excess. The solution has a pH of 7.00 at 25°C if the acid and base are equimolar.

Contrarily, weak bases only partially react with water to form hydroxide ions, whereas strong bases completely react to form the hydroxide ion. A strong acid and strong base react by neutralizing one another, which results in the production of salt and water.

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Answer:

because H (hydrogen) is very reactive with other elements

Explanation:

Interpret the IR spectrum of Diphenylmethanol.

Diphenylmethanol is an organic compound with the formula (C₆H₅)₂CHOH. Also known as benzhydryl, it is a white solid and the parent member of the large class of diary alcohols.

Infrared (IR) spectroscopy is a method that observes the interaction of molecules with electromagnetic radiation in the wavelength region of 0.75 – 1,000 µm or at wave numbers of 13,000 – 10 cm⁻¹

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This observation illustrates the concept of a solution's solubility, which is the amount of solute that can be dissolved in a given amount of solvent at a certain temperature. In this case, the sugar is said to be highly soluble in water, as it was able to dissolve completely in the given volume.

Solubility is the property of a substance to dissolve in a solvent to form a homogeneous solution. It is a measure of the maximum amount of solute that can be dissolved in a given amount of solvent at a given temperature and pressure. Solubility is an important factor in many areas of science, including chemistry, pharmacy and environmental science.

This observation also shows that the sugar does not take up any additional volume when dissolved, as its molecules are small enough to disperse evenly throughout the solvent.

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