a 3-year-old child is drawing with a pen and calls it a pencil. when she tries to erase her drawing, she becomes confused about why it is not erasing. this new piece of information does not fit with her current understanding about what a pencil is and leads to . select one: a. equilibrium b. disequilibrium

The following are the rules for recognizing and naming binary molecular compounds from their chemical formulas:
1. The first element in the chemical formula will be the name of the first element in the compound.
2. The second element in the chemical formula will be the name of the second element in the compound.
3. If the first element is a metal, the second element will end in “-ide”.
4. If the first element is a nonmetal, the second element will end in “-ate” or “-ite”.
5. The prefixes “mono-, di-, tri-, tetra-, penta-, and hexa-” are used to indicate the number of atoms of each element in the compound.
6. When the prefixes are not used, the number of atoms of each element is implied by the subscript.
7. If the subscript is written as a fraction, the fraction is changed to a whole number when forming the compound name.

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The rules for recognizing and naming binary molecular compounds are written focusing on the lower groups and the higher groups.

The rules for recognizing and naming binary molecular compounds from their chemical formulas are as follows:

1. The element with the lower group number is written first in the formula, and its full name is used.

2. The element with the higher group number is written second in the formula, and its stem name is used along with the suffix -ide.

3. The prefixes mono-, di-, tri-, tetra-, penta-, and so on are used to indicate the number of atoms present for each element in the molecule.

4. The prefix mono- is omitted for the first element in the formula.

5. The ending -a or -o in the prefix is omitted if the element name begins with a vowel, and only the vowel of the prefix is used in the compound name.

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If some solid sodium hydroxide is added to a solu­tion that is 0.010–molar in (CH₃)₃CCl and 0.10–molar in NaOH, the reaction rate increases but k remains the same. Therefore, option D is correct.

In this scenario, when solid sodium hydroxide (NaOH) is added to a solution containing (CH₃)₃CCl and NaOH, a reaction between (CH₃)₃CCl and NaOH takes place. The balanced chemical equation for this reaction is:

(CH₃)₃CCl + NaOH ⇒ (CH₃)₃COH + NaCl

The reaction rate is determined by the concentration of the reactants. In this case, the concentration of (CH₃)₃CCl remains constant because only solid NaOH is added.

The rate constant depends on the specific reaction and the conditions under which it occurs. Since the temperature and volume remain constant, the rate constant (k) will also remain constant.

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Absorbance is the measure of how much light is absorbed by a sample solution at a particular wavelength. The Beer-Lambert law states that there is a linear relationship between the absorbance of a solution and its concentration.

Specifically, absorbance is directly proportional to the concentration and path length of the sample solution, and inversely proportional to the intensity of the incident light. This relationship can be expressed mathematically as A = ɛcl, where A is the absorbance, ɛ is the molar absorptivity (a constant unique to each substance), c is the concentration of the solution in mol/L, and l is the path length of the sample cell in cm.

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Each of the functions in column A will be performed by their respective hormones. Each of the hormones in the human body has a different function.

A hormone is a chemical substance that is produced by a gland or a group of cells and is transported by the bloodstream to target cells or organs in the body. They are produced by endocrine glands.

To answer your question:

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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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The atomic particles known as electrons are found in a distinct cloud outside of the atom's nucleus. The nucleus contains protons and neutrons.

Protons and neutrons are found in the centre nucleus of an atom, and electrons are found in a separate cloud that surrounds the nucleus. The atomic mass of an atom is made up of neutrons, which have no charge, and protons, which have a positive charge. Contrarily, electrons are negatively charged and control an element's chemical characteristics. The electron cloud, also known as the orbital, is the distinct cloud that surrounds the nucleus and is where the electrons are located. It is distinguished by various energy levels or shells. The quantity and configuration of electrons in an atom's electron cloud govern the atom's reactivity and chemical behaviour.

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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:

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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Dmitri Mendeleev was the Russian scientist who first arranged the elements in the periodic table. He arranged elements in the periodic table by their atomic mass, and he also made sure that elements with similar properties were placed in the same group.

The periodic table is a tabular representation of the chemical elements, which are arranged by atomic number, electron configuration, and chemical properties. The rows of the periodic table are known as periods, and the columns are known as groups or families. Elements in the same group have similar chemical and physical properties.

Mendeleev's contributions to the periodic table

Mendeleev was a Russian chemist who published the first widely recognized periodic table in 1869. In the periodic table, Mendeleev arranged the elements according to their atomic mass. He also left gaps in the periodic table for unknown elements, and he predicted their properties based on the properties of the known elements.

For example, he predicted the properties of germanium, which was discovered later, and he even named it. He was also able to predict the existence and properties of some of the noble gases.

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Answer:

large atomic size and low ionization energy.

Explanation:

Metallic behavior correlates with large atomic size and low ionization energy. Thus, metallic behavior increases down a group and decreases from left to right across a period. Elements in Groups 1A(1) and 2A(2) are strong reducing agents; nonmetals in Groups 6A(16) and 7A(17) are strong oxidizing agents.

To calculate the equilibrium constant for a reaction with heat absorbed, determine equilibrium concentrations and use the law of mass action.

At the concentration equilibrium constant for a certain reaction, heat is absorbed if the reaction is run at constant pressure. Some of the reactants are liquids and solids, and the net change in moles of gases is .

To calculate the equilibrium constant, we need to first determine the equilibrium concentrations of each species. We can do this by using the mass and moles of the reactants and products, the stoichiometric coefficients, and the net change in moles of gases.

Once we have the equilibrium concentrations, we can calculate the equilibrium constant using the law of mass action:

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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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H₂S₂(g) is expected to have higher entropy than H₂S₂(l). CsBr(s) is expected to have higher entropy than Sro(s). H₂O(l) is expected to have higher entropy than H₂O₂(l). SO₃(g) is expected to have higher entropy than SO₃(s).

The entropy of the substance is determined by the amount of randomness and disorder it has. The higher the entropy, the greater the randomness of the substance. At the same temperature and pressure, a pure solid has a lower entropy than a pure liquid, which in turn has a lower entropy than a pure gas. The entropy of a substance is determined by its physical state, molecular structure, and the quantity of the substance.
H₂S₂ is a chemical compound with two sulfur atoms and two hydrogen atoms. The state of H₂S₂(g) is a gas, and H₂S₂(l) is a liquid. Since the gas state is more disordered than the liquid state, H₂S₂(g) is expected to have higher entropy than H₂S₂(l).
Both CsBr(s) and Sro(s) are in the solid-state. However, CsBr(s) has a higher entropy than Sro(s) because it has more molecules. This means that CsBr(s) has a greater degree of randomness and disorder than Sro(s).
H₂O(l) and H₂O₂(l) are both liquid states, but H₂O(l) has higher entropy because it has more degrees of freedom. H₂O(l) can rotate and translate freely, while H₂O₂(l) has a rigid structure that does not allow for the same degree of movement.
SO₃(g) is in the gaseous state, while SO₃(s) is in the solid-state. At the same temperature, the entropy of SO₃(g) is greater than that of SO₃(s) because the gas state is more disordered than the solid-state.

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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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Answer:

Cobalt, Nickel, Chromium, and Copper

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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The reaction demonstrates that energy is needed to dissociate the hydrogen atoms from one another, and as a result energy is consumed.

When a chemical bond is broken, energy is required to break the bond, and thus energy is absorbed. The equation that represents energy being absorbed as a bond is broken is option D, which is:

H2 + energy → 2H

In this equation, the energy is shown as a reactant on the left-hand side of the arrow, indicating that it is required for the reaction to proceed. The H2 molecule on the left-hand side represents a molecule with a covalent bond between two hydrogen atoms. When energy is added to the molecule, the bond between the two hydrogen atoms is broken, and the atoms become separated. This results in the formation of two hydrogen atoms on the right-hand side of the arrow, each with one unpaired electron.

Overall, the reaction shows that energy is required to break the bond between the hydrogen atoms, and thus energy is absorbed during the process.

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The potential of a standard hydrogen (S.H.E.) electrode under the given conditions is -0.126V.

A standard hydrogen electrode (SHE) is a reference electrode used to estimate the standard electrode potentials (E°) of half-reactions. It is made up of a platinum electrode coated in platinum black (Pt) and a hydrogen (H2) electrode dipping into an acidic solution of HCl. The pressure of H2 is measured at 1.0 atm, and the concentration of H+ is maintained at 1.0 mol/L. The potential of the SHE is set to 0.000 V at all temperatures, and other electrode potentials are compared to it to determine their standard reduction potentials.

Using the Nernst equation, we can compute the potential of the SHE : E = E° - (RT/nF)lnQ, where E is the cell potential, E° is the standard cell potential, R is the gas constant, T is the temperature, n is the number of moles of electrons transferred in the redox reaction, F is the Faraday constant, and Q is the reaction quotient.

The given conditions[H+] = 0.77 MPH2 = 1.4 atm T = 298 K

We can use the Nernst equation to calculate the potential of the SHE under these conditions as follows:

E = E° - (RT/nF)lnQ,

where  E° = 0.000 VR = 8.314 J/(mol*K)n = 2 F = 96,485 J/V*KpH2 = 1.4 atm

Q = [H+]2/[H2]E = E° - (RT/nF)lnQ= 0.000 - (8.314*298/2*96,485)*ln (0.77/1.4^2)= 0.000 - 0.000688= -0.126 V

Therefore, the potential of the standard hydrogen electrode (SHE) under the given conditions would be -0.126 V.

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The advantage of using saturated sodium chloride solution in the extraction of benzoic acid is that it helps to separate benzoic acid from other components in a solution due to its high solubility.

Extraction refers to the process of separating a particular compound from a mixture using a solvent. It's used to purify compounds, remove impurities, or separate two different compounds.

Benzoic acid is a white crystalline solid that can be extracted from benzoin or benzene, and it has a range of applications.

Sodium chloride is a common reagent used in the extraction of benzoic acid.

The isotonic nature makes it useful as a reagent for the separation of organic and aqueous layers. It causes the organic phase to separate easily:

Thus, overall, the use of saturated sodium chloride solution can help to improve the efficiency of the extraction process, allowing for better separation of the organic compound from the aqueous layer.

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The given statement is true that nonenzymatic E1 reactions can often result in a mixture of more than one alkene product. This is due to the presence of different possible elimination products.

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To solve this problem, we need to use the concept of solubility and saturation. Solubility is the maximum amount of solute that can dissolve in a given amount of solvent at a specific temperature.

The first step is to determine the solubility of potassium nitrate at 95°C and 35°C. According to the solubility chart, the solubility of potassium nitrate is 247 g/L at 95°C and 32 g/L at 35°C.

Next, we need to calculate how much potassium nitrate is dissolved in the 100 grams of water at 95°C. The solubility of potassium nitrate at 95°C is 247 g/L, so in 100 grams of water, we can dissolve:

(247 g/L) x (100 g / 1000 mL) = 24.7 g of potassium nitrate

Therefore, we have a saturated solution of potassium nitrate with 24.7 grams of potassium nitrate dissolved in 100 grams of water.

When the solution is cooled to 35°C, the solubility of potassium nitrate decreases to 32 g/L. Since we have more than 32 grams of potassium nitrate dissolved in the solution, the excess will precipitate out of the solution. The amount of potassium nitrate that will precipitate can be calculated by subtracting the solubility at 35°C from the initial concentration:

24.7 g - (32 g/L) x (100 g / 1000 mL) = 18.3 g

Therefore, 18.3 grams of potassium nitrate will precipitate out of the solution when it is cooled from 95°C to 35°C.

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The beaker that best represents a saturated solution is the one in which the solution is at its maximum level of solubility, meaning it cannot dissolve any more solute at the same temperature.

Saturated solutions are solutions in which no more solute can dissolve in the solvent at the same temperature. A solution is a homogeneous mixture composed of a solvent and a solute.

The solvent is the major component of the solution, and the solute is the minor component. The solute dissolves in the solvent to create a homogeneous solution.

A solution is said to be saturated when it has the maximum amount of solute that can dissolve in it at the same temperature. If the temperature changes, the solubility of the solute will also change, and the solution will become unsaturated or supersaturated.

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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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(i).The mass of ammonia produced is 2.43 x 10^3 g. (ii) The 71.4 moles of dinitrogen react with 214.2 moles of dihydrogen to produce 142.8 moles of ammonia. (iii) Mass of ammonia produced in given reaction with 1 gram of dinitrogen and 3 grams of dihydrogen is 1.22 g.

Using the given masses of dinitrogen and dihydrogen, we can calculate moles of each:

dinitrogen = mass/molar mass = 2.00 x 10^3 g/28 g/mol = 71.4 mol,

dihydrogen = mass/molar mass = 1.00 x 10^3 g/2 g/mol = 500 mol

The mass of ammonia produced can be calculated as:

[tex]Mass of ammonia = moles * molar mass = 142.8 mol * 17 g/mol = 2.43 * 10^{3 }g[/tex]

Therefore, the mass of ammonia produced is 2.43 x 10^3 g.

We can calculate the mass of ammonia produced using the equation:

[tex]mass = number of moles * molar mass = 2 * 0.0356 * 17.03 = 1.22 g[/tex]

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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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A substrate concentration of 10-100 mM is sufficient to achieve zero-order kinetics.

The substrate concentration utilized in enzymatic analyses to ensure zero-order kinetics is a high substrate concentration.

A high substrate concentration is typically utilized in enzymatic analyses to ensure zero-order kinetics.

Zero-order kinetics refers to the reaction rate's independence on the substrate concentration's magnitude when the substrate concentration is significantly greater than the enzyme concentration in the reaction.

Kinetic behavior is when the reaction rate is constant and not dependent on substrate concentration.

Thus, a substrate concentration that is 10- to 20-fold higher than the enzyme concentration, that is around 10-100 mM is used to achieve zero-order kinetics.

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Answer:

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