select the best explanation for why methanol, ch3oh, cannot be used as a solvent for the deprotonation of a terminal alkyne by sodium amide, nanh2.

Answer:

You may be saving someone from a rock slide, where the rocks will fall at any time, before they fall they have potential energy.

The one way that potential energy might be involved in rescue team missions to save someone to fall is potential energy is used to hold one.

Gravity is the interaction that is because of the force of energy between the surface of the earth to the mass or any energy present on the earth's surface and the force becomes double with the weight.

The potential energy is a form of energy that is used against gravity to do the work which required energy and in rescue, the energy is needed in every coss to save one.

Therefore, one way that potential energy might be involved in rescue team missions to save someone to fall is because gravitational potential energy is used to hold one.

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Answer:

Iron age farm

Explanation:

edge 2020

Answer:

D

Explanation:

Got it right on edge

The freezing point depression of a solution is proportional to the molality (m) of the solution, where molality is defined as the number of moles of solute per kilogram of solvent.

The more solute dissolved in a solution, the lower its freezing point will be. Based on this information, we can match the aqueous solutions with their appropriate letter from the column on the right:

0.10 m CuCl2 → C. Third lowest freezing point

0.13 m Cr(CH3COO)2 → B. Second lowest freezing point

0.17 m CuSO4 → A. Lowest freezing point

0.37 m Glucose (nonelectrolyte) → D. Highest freezing point

Explanation:

CuCl2 and CuSO4 are both strong electrolytes that dissociate completely in solution to form two ions per formula unit.

Therefore, they will have a greater effect on the freezing point depression compared to Cr(CH3COO)2, which only dissociates partially in solution.

Glucose is a nonelectrolyte and does not dissociate in solution, so it will have no effect on the freezing point depression. Therefore, it will have the highest freezing point among the given solutions.

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I=0,1,2 for an orbital quantum number for M shell (n=3).

n = 3 (Given)

Depending on the amount of n, l might range from 0 to (n – 1).

∴ For n = 3 l = 0, 1, 2

M l can have ( 2 l + 1) values for a given value of l.

For l = 0, m = 0, l = 1, m = -1, 0, 1 and l = 2, m = -2, - 1, 0, 1 and 2, respectively

∴ For n = 3, l = 0, 1, 2, m = 0, 1, 0, 1, 2, and m = 2, 1, 0, 1, 2, respectively.

L equals 2 for a 3D orbit.

The number of possible values for ml for a given value of l is (2l + 1), or 5.

∴ For l = 2 m\s2\s = - 2, - 1, 0, 1, 2

Only the orbitals 2s and 2p are possible from the set. 3f and 1p are incompatible.

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Answer:

I would say B but you don't have to take my word for it

Answer:

D

Explanation:

The scale model that would indicate a container large enough to hold 1,000 cubic meters of water if the scale is 1 inch = 1 meter is a model that has a volume of 1,000 cubic inches.

To determine this, we first need to convert cubic meters to cubic inches, as the scale for each model is given in inches.

1 meter = 39.37 inches,

so 1 cubic meter = (39.37 inches)³ = 61,023.7 cubic inches.

Therefore,

1,000 cubic meters = 1,000 x 61,023.7 = 61,023,700 cubic inches

Since the scale is 1 inch = 1 meter, we can use the volume formula for a rectangular prism, which is length x width x height, to determine the volume of the container represented by each model.

For example, if a model has dimensions 10 inches x 10 inches x 10 inches, its volume would be 10 x 10 x 10 = 1,000 cubic inches. We would then need a container that has 61,023,700 / 1,000 = 61,023.7 of these models, or one model that has a volume of 61,023,700 cubic inches.

As a result, if the scale is 1 inch = 1 metre, the scale model that would suggest a container large enough to store 1,000 cubic metres of water has a volume of 61,023,700 cubic inches.

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Answer: The best answer is D. The number of moles of a solute per kilogram of solvent

Explanation:

I hope this helps, whereas, the molality doesn't represent moles nor liters.

Explanation:

The question had been explained.

Aaron Douglas was a prominent figure of the Harlem Renaissance, a cultural movement that emerged in the 1920s and 1930s.

Based on his style, it is likely that Douglas used a limited palette in his painting Let My People Go. He often used a muted color scheme, with earthy tones and blues, greens, and purples.

Douglas typically used high-key colors in his paintings, which means that he used bright, saturated colors that create a sense of energy and vitality. He also used low-key colors to create contrast and depth.

The light source in Douglas' paintings is often not clearly defined, as he tended to flatten the picture plane and eliminate shadows. When shadows are present, they are often stylized and simplified.

In terms of balance, Douglas often used symmetrical and asymmetrical compositions in his paintings. He was also known for using repetition and pattern to create a sense of visual harmony.

In Let My People Go, it is likely that Douglas emphasized the figures and their struggle for freedom. The painting depicts the biblical story of Moses leading the Israelites out of slavery in Egypt, which was a powerful symbol of hope and liberation for African Americans during the Harlem Renaissance.

Finally, the size of objects and figures in Douglas' paintings varied depending on the composition and the message he wanted to convey. He often used large, monumental figures to emphasize their strength and resilience.

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The acidity of vinegar works well to remove bathtub grime.  

Acidity refers to the higher concentration of H+ ions present in a substance. Acids are substances that donate protons (hydrogen ions) in aqueous solution, resulting in a lower pH value. pH is a measure of the acidity or basicity of a solution and ranges from 0 to 14, with 0 being the most acidic, 7 being neutral, and 14 being the most basic.

Vinegar is a weak acid, typically containing acetic acid, which can help dissolve mineral deposits and soap that accumulate on the surface of a bathtub. To use vinegar to clean your bathtub, mix equal parts of white vinegar and water in a spray bottle, then spray the solution onto the dirt and let it sit for 15-20 minutes. After that, scrub the bathtub with a soft-bristled brush or sponge, then rinse the surface with water.

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The key difference in the vertical location of compounds like chloroform and toluene in an aquifer is primarily due to their respective densities and solubilities. An aquifer is an underground layer of water-bearing permeable rock or unconsolidated materials from which groundwater can be extracted.

The distribution of chemical compounds within an aquifer is influenced by their physical and chemical properties.
Chloroform (CHCl3) is a dense non-aqueous phase liquid (DNAPL), meaning it is denser than water and has limited solubility in water. Due to its high density, chloroform tends to sink vertically in an aquifer, accumulating at the bottom and creating a separate phase. This can result in the contamination of deeper groundwater resources, making remediation efforts more challenging.
On the other hand, toluene (C7H8) is a light non-aqueous phase liquid (LNAPL) and is lighter than water. As a result, toluene tends to float on the surface of the groundwater within an aquifer. This makes the contamination more localized and relatively easier to remediate compared to DNAPLs like chloroform. However, toluene's solubility in water may still lead to groundwater contamination.
In summary, the primary difference in the vertical location of compounds like chloroform and toluene in an aquifer is due to their density and solubility. Chloroform, being a DNAPL, sinks and accumulates at the bottom of an aquifer, while toluene, an LNAPL, floats on the groundwater surface. These characteristics play a crucial role in the contamination and remediation of groundwater resources.

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Answer:

152

Explanation:

The compound that fits the description of an organic base containing chlorine and two phenolic rings, used for hand scrubbing, neonatal washes, wound degerming, and prepping surgical skin sites is: B. chlorhexidine

Chlorhexidine is a disinfectant and antiseptic compound commonly used in healthcare settings. It has broad-spectrum antimicrobial properties and is effective against a wide range of bacteria, fungi, and viruses. Chlorhexidine is available in various forms, such as solutions, creams, and wipes, and it is used for hand hygiene, skin preparation before surgical procedures, and wound cleansing.

Carbolic acid (A), triclosan (C), formalin (D), and quaternary ammonium compounds (E) are different types of disinfectants or antiseptics, but they do not specifically match the description given in the question.

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potential energy diagram 1 is correctly illustrates this reaction.

Given the balanced equation representing a reaction:

N₂(g) + O₂(g) + 182.6 kJ → 2NO(g)

What is potential energy diagrame?

A potential energy diagram shows the changes in potential energy that occur during a chemical reaction. The reaction coordinate (or progress of the reaction) is plotted on the x-axis, while the potential energy of the reactants and products is plotted on the y-axis.

For this particular reaction, the given balanced equation indicates that the reaction is exothermic, meaning that it releases energy (in the form of heat) and has a negative enthalpy change. This means that the potential energy of the products (2NO) is lower than the potential energy of the reactants (N₂ and O₂).

A potential energy diagram for this reaction would therefore show a downward sloping line from the reactants to the products, with a negative change in potential energy (corresponding to the release of energy) as the reaction progresses.

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the potential energy diagram should show an exothermic reaction where energy is released as the reactants form products. The downhill slope represents the energy released during the reaction, and the lower potential energy of the products compared to the reactants indicates that the reaction is exothermic. So the answer  is option A .

What is Potential energy

Potential energy refers to the energy that an object possesses due to its position or configuration. It is stored energy that can be converted into other forms of energy, such as kinetic energy (the energy of motion) or thermal energy (the energy associated with the temperature of an object).

What is exothermic reaction

Exothermic reactions are a common type of chemical reaction that occurs spontaneously under certain conditions, such as when a fuel burns, or when two chemicals react and release energy.

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Answer:

large particle composite

1. D. Absorbing excess carbon dioxide in the atmosphere

2.C. Abnormal warming of the earth

3.D. Organisms in the converted forest areas will lose their natural habitats.

4.D. Tropical rainforests have important functions in the ecosystem

5.C. Loss of habitat of many marine creatures

6.B. Use of sodium cyanide in fishing

1. The important roles of tropical rainforests in the earth's environment: Rainforests are often called the lungs of the planet for their role in absorbing carbon dioxide, a greenhouse gas, and increasing local humidity.

2. If all trees were cut down and burned, the forest's carbon storage capacity would be lost to the atmosphere.

3. The most common pressures causing deforestation and severe forest degradation are agriculture, unsustainable forest management, mining, infrastructure projects and increased fire incidence and intensity.

4. Need to conserve and protect tropical rainforests: The most important function of forests is that it produces mass amounts of oxygen as a by-product of photosynthesis. ... Forests also prevent soil erosion and keep soil pollution in check.

5. If coral reefs are destroyed: Sea life has the most to lose. Coral reefs cover less than 1% of the ocean floor. But, they provide an essential ecosystem for a quarter of all marine life.

6. Pollution, overfishing, destructive fishing practices using dynamite or cyanide, collecting live corals for the aquarium market, mining coral for building materials, and a warming climate are some of the many ways that people damage reefs all around the world every day.

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We would need 500 g of sodium ascorbate and 440 g of ascorbic acid to make 10.0 liters of pH 4.25 buffer with a total concentration of 0.500 M.

To calculate the amount of sodium ascorbate and ascorbic acid needed to make a 10.0 liter pH 4.25 buffer with a total concentration of 0.500 M, we need to consider the Henderson-Hasselbalch equation. The Henderson-Hasselbalch equation is given by pH = pKa + log([A-]/[HA]), where [A-] is the concentration of the conjugate base (sodium ascorbate) and [HA] is the concentration of the acid (ascorbic acid).

First, we need to find the pKa value for the buffer system. Then, we can rearrange the Henderson-Hasselbalch equation to solve for [A-] and [HA]. Once we have the concentrations, we can convert them to kilograms using the molar mass.

Let's assume the pKa for this buffer system is 4.25. Plugging in the values, we get pH = 4.25 = 4.25 + log([A-]/[HA]). Since pH = pKa, [A-] and [HA] will be in equal concentration.

To find the concentration, we solve for [A-]/[HA]: 0

= log([A-]/[HA])

which means [A-]/[HA] = 1.

Now, we can calculate the concentration of sodium ascorbate and ascorbic acid using the total concentration of 0.500 M. Since they are in equal concentration, each will be 0.250 M.

Next, we convert the molarity to kilograms. We need to know the molar mass of sodium ascorbate and ascorbic acid.

For example, if the molar mass of sodium ascorbate is 200 g/mol, we can calculate the mass as follows:

Mass of sodium ascorbate = 0.250 mol/L * 200 g/mol * 10 L

= 500 g

Similarly, if the molar mass of ascorbic acid is 176 g/mol, we can calculate the mass as follows:

Mass of ascorbic acid

= 0.250 mol/L * 176 g/mol * 10 L

= 440 g

Therefore, we would need 500 g of sodium ascorbate and 440 g of ascorbic acid to make 10.0 liters of pH 4.25 buffer with a total concentration of 0.500 M.

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During relatively high-intensity exercise lasting less than one hour, the primary fuel for muscular work is carbohydrates.

When engaging in high-intensity exercise, the body relies on readily available sources of energy to fuel muscular work. Carbohydrates, in the form of glucose and glycogen, serve as the primary fuel source during these intense activities.

Carbohydrates are efficiently broken down into glucose, which can be readily utilized by muscle cells for energy production through a process called glycolysis. Glycolysis rapidly converts glucose into ATP (adenosine triphosphate), the energy currency of the body.

During high-intensity exercise, the demand for energy is high, and the body needs to produce ATP quickly to meet the increased energy requirements. Carbohydrates provide a fast and efficient source of fuel for immediate energy production, making them the primary choice for high-intensity activities.

The body stores carbohydrates in the form of glycogen in the muscles and liver, which can be rapidly broken down into glucose when needed. This glycogen reserve plays a crucial role in sustaining energy levels during intense exercise lasting less than one hour.

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To make 1300 mL of a 0.280 M NH3 solution, you should dilute approximately 56.61 mL of the stock solution of 14.6 M NH3.

The diluted solution can be prepared using the equation:

M1V1 = M2V2

where

M1 = initial concentration

V1= stock solution volume

M2 = desired concentration

V2 = diluted solution volume

Given:

M1 = 14.6 M (concentration of the stock solution)

V1 = ?

M2 = 0.280 M (desired concentration of the diluted solution)

V2 = 1300 mL (desired volume of the diluted solution)

Rearranging the equation, we have:

V1 = (M2 * V2) / M1

Substituting the given values:

V1 = (0.280 M * 1300 mL) / 14.6 M

V1 ≈ 56.61 mL

Therefore, you should dilute approximately 56.61 mL of the stock solution of 14.6 M NH3 to make 1300 mL of a 0.280 M NH3 solution.

To prepare 1300 mL of a 0.280 M NH3 solution, you need to dilute approximately 56.61 mL of the stock solution of 14.6 M NH3. Dilution calculations involve using the equation M1V1 = M2V2, where the initial concentration, volume, and desired concentration and volume are taken into account. Dilution is a common technique in the laboratory to adjust the concentration of a solution to a desired level.

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Answer:

Insects, bacteria and fungi

Explanation:

Answer:  2 protons

Explanation:

The element number, 2 for He, is the number of protons in the nucleus.  The 4.0026 is the average atomic mass of He.

The concentration is measured by molarity, the formula of molarity is:

Based on the given data, we've already had the volume in liters and we have to convert 6.25 grams of HCl to moles. We have to use the molar mass of HCl which is 36.4 g/mol (you can find the molar mass using the periodic table). The conversion would be:

And the final step is to replace the values we have in the formula of molarity:

The molarity of 6.25 g of HCl in 0.300 L of solution is 0.573 M.

Answer:

An ion is a charged version of an atom that is formed by loss or gain of electrons compared to the atom.

Explanation:

Atoms are neutral; they contain the same number of protons as electrons. By definition, an ion is an electrically charged particle produced by either removing electrons from a neutral atom to give a positive ion or adding electrons to a neutral atom to give a negative ion.

An ion is a charged version of an atom that is formed by loss or gain of electrons compared to the atom.

An atom or molecule is said to be an ion if at least one of its valence electrons have been acquired or lost, giving it a net either a positive or a negative electrical charge. In other terms, a chemical species has an unbalanced quantity of protons compared to electrons.

Because there are more protons than electrons in a given species, cations are ions with a net positive charge. Ions with a negative charge that is net are known as anions. Protons are outnumbered by electrons in anions. An ion is a charged version of an atom that is formed by loss or gain of electrons compared to the atom.

Therefore,  an ion is a charged version of an atom that is formed by loss or gain of electrons compared to the atom.

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The correct molecular formula for the compound magnesium chromate pentahydrate is as follows: MgCrO₄•5H₂O.

Molecular formula in chemistry is a notation indicating the number of atoms of each element present in a compound.

Chemical or molecular formula is a way of presenting information about the chemical proportions of atoms that constitute a particular chemical compound or molecule, using chemical element symbols, numbers, and sometimes also other symbols, such as parentheses, dashes, brackets, commas and plus (+) and minus (−) signs.

The chemical formula also reveals information about the types and number of atoms that make up a chemical compound or molecule.

For example; a chemical compound named magnesium chromate pentahydrate will have a chemical formula of MgCrO₄•5H₂O.

This tells us that the compound contains magnesium, chromium, oxygen, and hydrogen atoms.

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Answer:

1. A

Explanation:

1.A True we can identify solutions based on the color of the solutions. If you look at our  universal PH color chart. Red, Orange, and yellow are acids.

2. D, If you look at the pH levels. Both B and C have a pH level equal to or greater than 7. Note that any pH level 7 or higher is a basic solution.

3.A

Looking at the pH level we can see that this is an acidic solution. So, by adding more water. The acidity will lessen.

After Amy agrees to purchase an oven at a special price, the salesman tells her that he misquoted the price. Amy then agrees to purchase the oven at the new higher price.  The salesman in this scenario has effectively used the "Foot-in-the-Door" technique.

The Foot-in-the-Door technique is a persuasion strategy where a small initial request is made to gain compliance, and then a larger request is made afterward. In this case, the initial request was to purchase the oven at a special price, which Amy agreed to. However, the salesman then reveals a higher price, leading Amy to agree to the new higher price. This technique works by establishing a sense of commitment and consistency. Once individuals have committed to a small request or action, they are more likely to feel compelled to follow through with subsequent requests that align with their previous commitment. In this situation, Amy's initial agreement to purchase the oven at a special price created a psychological commitment. When faced with the revised higher price, Amy may have felt a need to maintain consistency and honor her previous commitment, leading her to agree to the new price. By using the Foot-in-the-Door technique, the salesman successfully leveraged Amy's initial agreement to influence her decision to accept the higher price.

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The number of molecules in 4.62 moles nitric acid has been 27.82 × 10²³.

It's likely that the common person has had no notion how many molecules make up 4.62 milligrams of hydrogen peroxide, but that's good! By the end of this article, you will be able to confidently respond to that question since you will having studied everything you needed concerning moles and molecules.

The moles have been described as the mass of the compound with respect to the molar mass. According to the Avogadro law, the number of molecules present in a mole of sample has been equivalent to the Avogadro number.

Therefore,

The Avogadro number has been a constant quantity with the value of .

6.023 × 10²³

The Avogadro law has been given as:

1 mole = 6.023 × 10²³ moles

Calculating for 4.62 moles nitric acid as:

   4.60 moles = 6.023 × 10²³  × 4.62 molecules

⇒ 4.60 moles = 27.82 × 10²³ molecules.

The number of molecules in 4.62 moles nitric acid has been 27.82 × 10²³

Consequently, there are 27.828 x 10′′23 nitric acid molecules in 4.62 moles of nitric acid. This article is not simply concerning Avogadro's number. It turns out that these mass of the particles impacts how many particles are present in a mole of a substance So.

Complete Question:

How many molecules are in 4.62 moles of nitric acid (HNO3)?

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We can reduce the risks and difficulties brought on by using less nonrenewable resources by adopting a comprehensive strategy for doing so.

Environmental Damage: Extraction, transportation, and burning of nonrenewable resources such as coal, oil, and gas can cause environmental damage such as air and water pollution, soil degradation, and climate change.

Price Volatility: The prices of nonrenewable resources can fluctuate greatly, making it difficult for businesses and consumers to plan and budget.

Energy Security: Dependence on nonrenewable resources can create energy security risks, as supplies can be disrupted due to geopolitical tensions or natural disasters.

Depletion: Nonrenewable resources are finite and can eventually be depleted, which can lead to economic and social challenges.

To limit our dependence on nonrenewable resources, we can take several steps, including:

Increasing Energy Efficiency: We can reduce our reliance on nonrenewable resources by improving energy efficiency in buildings, vehicles, and industry.

Developing Renewable Energy Sources: We can invest in renewable energy sources such as solar, wind, and hydro power to replace nonrenewable resources.

Encouraging Sustainable Practices: Governments can encourage sustainable practices such as recycling, reducing waste, and conserving resources.

Promoting Research and Development: We can invest in research and development of new technologies and solutions that reduce our dependence on nonrenewable resources and address associated problems.

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