Complete the sentences to explain what’s happening at different portions of the heating curve. particles of the substance have the most kinetic energy when the substance is . the part of the graph that represents where the substance has the least amount of potential energy is labeled .

This battery could be made stronger when we make lithium the anode and make zinc the cathode.

We know that the term electron affinity has to do with the fact the a specie is able to attract electrons. Hence, the specie that can be able to attract electrons is said to be have a greater electron affinity.

If we look at the order of the reactivity of the metals, we can see that the lithium has more tendency to exist as a positive ion as such the electron affinity of the lithium atom is very negative and it does not attract electrons.

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The selection rules of quantum mechanics allow finding the result for the order of the atomic levels are:

number higher electrons   -- lower number electrons

                Principal  > Orbital  > Magnetic          

                           n   >   l   > \(m_l\)

The solution of the Schrodinger equation of quantum mechanics results in the energy of the in electrons in an atom that has spherical symmetry and has three constants that are related.

The constants are called quantum numbers and are: The main, the secondary or orbital and magnetic.

The principal quantum number (n) can have values ​​from 0 to infinity

The orbital quantum number (l) can have a value from 0 to n -1, it is customary to write this number with letters

     number    symbol

          0             s

          1              p

          2             d

          3             f

The magnetic quantum number (\(m_l\) ) can have values ​​from -l to l

Apart from this number there is a fourth quantum number called spin magnetic quantum number (\(m_s\)) and it can have only two values ​​½ and -½,

These numbers that are allowed in quantum mechanics are called select rules. We can see that in each main number (n) there can be several orbital numbers (l) and within each orbital number there can be several magnetic numbers and within each of them there is

The order of the levels from highest to lowest number of electrons are:

    Spin.             Lowest

    Mmagnetic

    Orbital

    Principal     Highest

In conclusion using the selection rules of quantum mechanics we can find the result for the order of the atomic levels are:

Number higher electrons   -- Lower number electrons

       Principal  > Orbital  > Magnetic

            n  >  l  > \(m_l\)

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Answer:

84.00g CO2 * 1mol CO2/44.009g CO2 * 25mol O2/16mol CO2 * 31.998g O2/1mol O2 = 95.43g O2

Explanation:

Here is the answer in picture form

The leaching process is a technique used to extract soluble components from a solid material by selectively dissolving them into a suitable solvent.

Four factors that leaching is dependent on are:

Two factors to consider when selecting the solvent are:

It is important to pre-treat the solid before leaching to remove any impurities or contaminants that may hinder the leaching process. Pre-treatment can involve processes such as crushing, grinding, or washing to increase the surface area available for contact with the solvent and to remove any surface coatings or layers that may inhibit the extraction.

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When holding food without temperature control, it is essential to mark the food to indicate its time of preparation or removal from temperature control. This practice is crucial for food safety and helps prevent the growth of harmful bacteria that can cause foodborne illnesses.

Marking the food provides a clear visual indication of how long it has been held at room temperature or in a potentially unsafe temperature range. The marking typically includes the date and time of preparation or removal from temperature control. This information allows food handlers and consumers to assess the freshness and safety of the food.

By implementing a clear marking system, it becomes easier to identify when the food should be discarded if it has exceeded the recommended time for holding without temperature control. This helps to prevent the consumption of potentially hazardous food that may have become contaminated or spoiled due to prolonged exposure to unsafe temperatures.

The marking also aids in proper rotation and inventory management. By indicating the time of preparation or removal from temperature control, food handlers can ensure that older items are used or discarded first, reducing the risk of serving expired or unsafe food to customers.

Additionally, marking the food provides a level of accountability and traceability. In the event of a foodborne illness outbreak or food safety inspection, having clear and accurate markings can assist in identifying the source of the issue and implementing corrective actions.

Overall, marking food that is held without temperature control is a crucial practice for maintaining food safety. It helps prevent the consumption of potentially hazardous food, aids in inventory management, and provides accountability and traceability in the event of food safety incidents.

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Ethanol use was effect the shortage of corn available on those time because of corn is an ingredient to produce the ethanol. Hence, ethanol use was aligned with the rarity of corn availability on those time. the more ethanol was used, the more rare corn availability for consumer.  

The drought is a condition where the area cant provide enough water supply for a long. Agriculture sector is the most affected sector when the drought occur. The drought cause crop failure, and this condition create domino effect on another sector such as food price get more expensive, and because of food get more expensive, buying power getting low cause small business out of business.

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Answer:

The pH of milk is 6. As the pH of milk reduces , it starts turning into curd. Hence, to prevent that, the milkman adds a small amount of baking soda, which is a base. By doing this he increases the pH of the milk and prevents it from turning into curd sooner.

If a student burns 3.53 moles of C3H8, 10.29 moles of carbon dioxide would be produced. Details about number of moles can be found below.

The number of moles of a substance can be calculated as follows:

The following chemical equation was given as follows:

C3H8 + 502 = 3CO2 + 4H₂O

1 mole of C3H8 produced 3 moles of carbon dioxide

Hence, 3.53 moles of C3H8 will produce 3.53 × 3 = 10.59 moles of CO2.

Therefore, if a student burns 3.53 moles of C3H8, 10.29 moles of carbon dioxide would be produced.

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The appropriate reagents for each reaction are

1. \(H_{2}\), Pd/C

2. \(H_{2}O\), \(H_{2}SO_{4}\)

3. HBr

4. \(H_{2}SO_{4}\) heat

5. mCPBA

6. NaOMe

7. \(Br_{2}\)

Orgаnic trаnsformаtion involves the conversion of one substrаte into аnother by the use of inorgаnic/orgаnic reаgents. The reаction scheme under considerаtion here involves vаrious trаnsformаtions on cyclopentene/cyclopentаnol. The trаnsformаtion involves oxidаtion, hydrаtion, dehydrаtion epoxide formаtion, аnd dihydroxylаtion.

Your question is incomplete, but most probably your full question can be seen in the Attachment.

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Answer:I think the answer would be 2 mol/L

The solubility of a gas in a liquid depends on several factors, such as the nature of the gas and the liquid, temperature, and pressure.

According to Henry’s law, the solubility of a gas in a liquid is directly proportional to the partial pressure of the gas above the liquid. This means that as the pressure of the gas increases, more gas molecules can dissolve in the liquid. Conversely, as the pressure of the gas decreases, less gas molecules can dissolve in the liquid.

Therefore, out of the four options given, the decreased temperature is the correct answer. Decreased temperature increases the solubility of a gas in a liquid because it reduces the kinetic energy of the gas molecules, making them less likely to escape from the liquid surface. Increased temperature decreases the solubility of a gas in a liquid because it increases the kinetic energy of the gas molecules, making them more likely to escape from the liquid surface. Increased or decreased volume of the gas does not affect its solubility in a liquid, as long as its partial pressure remains constant.

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Answer:

Addition of impurities (eg salt) raises the boiling point of water.

The chemical reaction through which a molecule of sucrose is broken down into its monomers (glucose and fructose) is an example of:

\(Sucrose + H_{2} O -- > glucose + fructose\)

What is chemical reaction?

However, A chemical change occurs while the candle burns in the demonstration.

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Answer:

Molar concentration is measured in g/dm³

Answer: Group 11

Explanation:

A molecule will always be polar if it has polar bonds.

For a molecule to be polar, it must have polar bonds and have those bonds organized in such a way that the bond dipoles do not cancel each other out. Molecules that are polar have both positively and negatively charged parts. A common polar substance is water. Because of its structure and the types of bonds it contains, the molecule has a slight positive charge at one end (the hydrogen end) and a slight negative charge at the other (the oxygen end). Due to the uneven distribution of electrons among the atoms and the asymmetrical nature of the water molecule, the hydrogen atoms at one pole of the molecule are positively charged, while the oxygen atoms at the other pole are negatively charged (side). We use the term "electrically polar" to describe the water molecule.

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Answer:

(a) Formation of the carbocation is the rate-determining step (RDS)

(c) Reactions at chiral carbons proceed with inversion of stereochemistry

Explanation:

SN1 reactions arenucleophilic substitution reactions in which the rate determining step is unimolecular.

The formation of a carbocation is the rate determining step. This depends on the electrophilicity of the leaving group. Thus the SN1 reaction mechanisms is dependent on the electrophile and not the nucleophile.

Polar and acidic solvents which can assist in the formation of the carbocation speeds up the rate determining step.

If the formation of carbocation occurs at a chiral center, both retention and inversion of stereochemistry are likely to occur.

Therefore, the correct options are A and C.

Answer:

Combination reaction is taken during this reaction

The mantle can be separated into two different portions: the lower mantle and the upper mantle. The lower mantle is: completely solid due to extreme pressure that prevents iron-rich silica rocks from melting.

The majority of the interior of the Earth is made up of the mantle. The Earth's narrow crust and dense, very hot core are separated by the mantle. Approximately 2,900 kilometres (1,802 miles) deep, the mantle accounts for an astounding 84 percent of the volume of the planet.

Iron and nickel swiftly separated from other rocks and minerals when Earth started to take shape around 4.5 billion years ago, forming the planet's core. The early mantle was the molten material that encircled the core.

Mantle cooling occurred over millions of years. "Outgassing" is the process of water contained inside minerals erupting with lava. The mantle solidified as more water was outgassed.

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The mantle, Earth's thickest layer, can be separated into two distinct portions: the lower mantle and the upper mantle. The lower mantle is situated below the upper mantle and extends from about 660 km to 2,890 km in depth. It consists of denser, high-pressure minerals, and has a more sluggish, less fluid behavior compared to the upper mantle. This portion plays a crucial role in the Earth's internal heat transfer and overall geodynamics.

The mantle, which is located between the Earth's crust and core, can be divided into two distinct sections: the lower mantle and the upper mantle. The lower mantle is the portion of the mantle that extends from a depth of 660 kilometers (410 miles) to the boundary between the mantle and the Earth's core, which is roughly 2,891 kilometers (1,800 miles) deep. It is composed of dense, solid rock and is the Earth's largest layer. The lower mantle is thought to play a critical role in the dynamics of the Earth's interior, including the formation of hotspots and the movement of tectonic plates.

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Clouds and smog differ in their composition.

Clouds are primarily composed of water vapor and various gases, including volatile organic compounds (VOCs), carbon monoxide (CO), and nitrogen oxides (NOx). These gases combine with water vapor and sunlight to form the white, fluffy formations we see in the sky. On the other hand, smog is composed of smoke and soot particulates, as well as invisible gases such as ozone and nitrogen dioxide (NO2).

While both clouds and smog contain gases, they differ in their main components and the way they are formed. Therefore, the correct answer to the question is "none of the above," since clouds are not primarily composed of VOCs, CO, and NOx.

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Answer:

58.6934

Explanation:

periodic table

Answer:

58.6934 u

Explanation:

You can find this from the atomic mass number on a Periodic Table, Nickel is 58.6934, therefore the mass of one atom of nickel is 58.6934 u.

I think the answer is A. I know it's Planet X.

Answer:  FeO2

Explanation:

 1.116       g  Fe

0.480     g O

We want to compare the NUMBER of Fe and O atoms.  We only have their masses, but since the molar mass of Fe is 5 times that of O, let's multiply the grams of O by 5 to have it "catch up" to the iron in ternms of number of atoms.   If the molar masses were the same, the masses would be in direct proportion to the formula.  Since they aren't, multiply by the molar mass ratio:

(1.116 grams Fe) x 1 = 1.116 g Fe

(0.480 g O) x 5 = 2.40 g O  [Changes the O mass into a number that correlates with the number of atoms relative to iron],

If the molar masses were the same, this would be the ratio of O to Fe atoms in the compound.  Normalize to the Fe number by dividing both by 1.116:

Fe = 1

O = 2.15

Not perfect, but an empiricle formula of FeO2 makes sense.  I don't see enough information here to prove that this is also the molecular formula, but FeO2 is a valid compound.  Fe(IV)O2,

1. The empirical formula of the compound is Fe₂O₃

2. The molecular formula of the compound is Fe₂O₃

1. Determination of the empirical formula of the compound.

Fe = 1.116 g

O = 0.480 g

Divide by their molar mass

Fe = 1.116 / 56 = 0.02

O = 0.480 / 16 = 0.03

Divide by the smallest

Fe = 0.02 / 0.02 = 1

O = 0.03 / 0.02 = 1.5

Multiply by 2 to express in whole number

Fe = 1 × 2 = 2

O = 1.5 × 2 = 3

Therefore, the empirical formula of the compound is Fe₂O₃

2. Determination of the molecular formula of the compound.

Empirical formula = Fe₂O₃

Molar mass = 5 × molar mass of O₂ = 5 × 32 = 160 g/mol

Molecular formula = empirical × n = molar mass

[Fe₂O₃]n = 160

[(2×56) + (3×16]n = 160

[112 + 48]n = 160

160n = 160

Divide both side by 160

n = 160 / 160

n = 1

Molecular formula = [Fe₂O₃]n

Molecular formula = [Fe₂O₃] × 1

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Answer:

chemical composition

To round the number first we will take into account that the first digit after the decimal represents the tenths place. When a number is greater than 5 we must add 1 to the previous figure to round it, if it is less than 5 we will leave the figure with the same value. Let's see how the rounded number would look:

So, the number rounded to the tenths position will be 62.5

Answer:

Explanation:

Calcium chloride is deliquescent. If exposed to air, it will absorb sufficient water from the air to allow it to dissolve. After a short while, instead of a white lump, you will have a pool of clear liquid.

No, the volume of water in a beaker is not an extensive property.

Extensive properties are those that depend on the amount or size of the substance being measured. In other words, they are properties that change with the quantity of the substance. Examples of extensive properties include mass, volume, and total energy.

In the given scenario, the volume of water in the beaker is 50 milliliters. This volume remains the same regardless of the quantity of water present. Whether it's 50 milliliters or 500 milliliters, the volume measurement does not change. Therefore, the volume of water in the beaker is an example of an intensive property.

Intensive properties are independent of the amount or size of the substance. They are characteristics that remain constant regardless of the quantity of the substance. Examples of intensive properties include temperature, density, and color.

It's important to note that the distinction between extensive and intensive properties depends on the specific property being considered. While volume is typically an extensive property for a bulk substance, in the case of a fixed volume of water in a beaker, it becomes an intensive property.

In summary, the volume of water in a beaker is not an extensive property but rather an intensive property because it does not change with the quantity of the substance.

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