which bonds found in the hair can be easily broken by heat or water?

The term for the minimum amount of fissile material necessary to sustain a chain reaction is the critical mass.

The term for the minimum amount of fissile material necessary to sustain a chain reaction is called the critical mass. The critical mass refers to the smallest mass of a fissile material, such as uranium-235 or plutonium-239, required to maintain a self-sustaining chain reaction.

In a nuclear chain reaction, each fission event releases neutrons that can cause additional fissions, leading to a self-perpetuating process. To sustain this chain reaction, a sufficient number of neutrons must be available to cause subsequent fission events. The critical mass represents the threshold at which the rate of neutron production equals the rate of neutron loss. If the mass is below the critical mass, the chain reaction will not be sustained and will eventually die out. Conversely, if the mass exceeds the critical mass, the chain reaction becomes self-sustaining.

The critical mass depends on various factors such as the fissile material used, its purity, the geometry of the material, and the presence of neutron moderators or reflectors. Achieving and maintaining criticality is a crucial consideration in nuclear reactor design and the production of nuclear weapons.

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Answer:

A battery is a device that stores chemical energy and converts it to electrical energy. The chemical reactions in a battery involve the flow of electrons from one material (electrode) to another, through an external circuit. The flow of electrons provides an electric current that can be used to do work.

Explanation:

The approximate resistance value at 45 degrees Celsius is around 5.8 ohms.

To calculate the value of the resistance temperature coefficient at 45 degrees Celsius using linear approximation, we can use the formula:

R(T) = R0 + α(T - T0),

where R(T) is the resistance at temperature T, R0 is the resistance at a reference temperature T0, α is the resistance temperature coefficient, and (T - T0) is the temperature difference.

Given that the resistance at 25 degrees Celsius is 5 ohms (R0 = 5) and the resistance at 50 degrees Celsius is 6 ohms (R(T) = 6), we can calculate the value of α.

6 = 5 + α(50 - 25),

Simplifying the equation:

1 = 25α,

Therefore, α = 1/25 = 0.04 ohm/degree Celsius.

Using the linear approximation, we can approximate the value of the resistance at 45 degrees Celsius:

R(45) = 5 + 0.04(45 - 25) = 5 + 0.04(20) = 5 + 0.8 = 5.8 ohms.

Therefore, the value of the resistance at 45 degrees Celsius is approximately 5.8 ohms.

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The mole ratio of MnO₂ to HCl is 1:4.The actual yield of Cl₂ is 26.00 g.

The balanced chemical equation for the reaction of hydrochloric acid with manganese (IV) oxide is as follows:

4 HCl(aq) + MnO₂ (s) → MnCl₂ (aq) + 2 H₂O(l) + Cl₂(g)

To determine the limiting reactant, we first need to calculate the number of moles of each reactant.

Using the mass of MnO₂:39.3 g MnO₂ × (1 mol MnO₂/86.94 g MnO₂) = 0.451 mol MnO₂

Using the mass of HCl:41.9 g HCl × (1 mol HCl/36.46 g HCl) = 1.151 mol HCl

The balanced equation shows that 1 mole of MnO₂ reacts with 4 moles of HCl to produce 1 mole of Cl₂.

Therefore, the mole ratio of MnO₂ to HCl is 1:4.

The limiting reactant is the one that is completely consumed in the reaction, thereby limiting the amount of product formed. Since the ratio of MnO₂ to HCl is 1:4.

we can see that 1.804 mol of HCl is required to react with all of the MnO₂, but we only have 1.151 mol of HCl. Thus, HCl is the limiting reactant.

The theoretical yield of Cl₂ can be calculated using the balanced equation and the limiting reactant:1 mol MnO₂ produces 1 mol Cl₂

The number of moles of MnO₂ is 0.451, which means the theoretical yield of Cl₂ is also 0.451 mol.

The theoretical yield of Cl₂ in grams can be calculated using the molar mass of Cl₂. The molar mass of Cl₂ is 70.90 g/mol. Thus:

0.451 mol Cl₂ × 70.90 g/mol = 32.03 g Cl₂

To find the actual yield of Cl₂, we need to use the percent yield formula:

percent yield = actual yield ÷ theoretical yield × 10081.3% = actual yield ÷ 32.03 g Cl₂ × 100

Solving for the actual yield gives: actual yield = 0.813 × 32.03 g Cl₂ = 26.00 g Cl₂

Therefore, the actual yield of Cl₂ is 26.00 g.

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Answer:

A

Explanation:

The molecules in both metal and surrounding air will start moving slower because of the sudden decrease in environment tmeperature. The thermal energy around the metal plate decreases, also decreasing the kinetic energy.

Answer:

Sulfur (Acidic)

Explanation:

Lime would just add to the amount of alkalinity, and water would do nothing much due to it being neutral.

Sulfur, which is acidic, will neutralize the pH level. The opposite of Alkalinity is Acidity, and Neutrality is in the middle of the two.

The width of the cell, which is 76 micrometers will be have a scientific notation value of 7.6 × 10-⁵metres

CONVERSION FACTOR:

1um = 10-⁶m

Therefore, the width of the cell in metres is 7.6 × 10-⁵m.

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Answer:

3.38 moles of O2.

Explanation:

We'll begin by writing the balanced equation for the reaction. This is illustrated below:

4CH2OH + 5O2 → 4CO2 + 6H2O

From the balanced equation above,

4 moles of CH2OH required 5 moles of O2 for complete combustion.

Finally, we shall determine the number of mole of O2 needed to react with 2.7 moles of CH2OH. This can be obtained as follow:

From the balanced equation above,

4 moles of CH2OH required 5 moles of O2 for complete combustion.

Therefore, 2.7 moles of CH2OH will require = (2.7 × 5)/4 = 3.38 moles of O2 for complete combustion.

Thus, 3.38 moles of O2 is required.

The experiment that disproved Thompson's "raisin pudding" model of the atom is the "Gold Foil Experiment" or the "Rutherford's Scattering Experiment."

Ernest Rutherford, along with his colleagues Hans Geiger and Ernest Marsden, conducted this experiment in 1911. They aimed to investigate the structure of the atom and test Thompson's model, which proposed that the atom consists of a uniform positive charge with negatively charged electrons embedded in it, similar to raisins in a pudding.

In the Gold Foil Experiment, Rutherford directed a beam of alpha particles (positively charged particles) at a thin sheet of gold foil. According to Thompson's model, the alpha particles should have passed through the gold foil with only minor deflections, as the positive charge was thought to be evenly distributed.

However, the results of the experiment were unexpected and did not align with Thompson's model. Rutherford and his team observed that a small fraction of the alpha particles were deflected at large angles and even bounced back. This indicated that the positive charge in the atom was concentrated in a small, dense region, which Rutherford termed the "nucleus." The rest of the atom was found to be mostly empty space.

The findings of the Gold Foil Experiment led to the development of the new atomic model known as the "Rutherford Model" or the "Planetary Model." In this model, the atom consists of a tiny, positively charged nucleus at the center, with electrons orbiting around it in distinct energy levels.

Therefore, it was Rutherford's Gold Foil Experiment that provided evidence against Thompson's "raisin pudding" model of the atom and led to the formulation of the new understanding of atomic structure.

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To determine the amount of water and methane needed, we can set up a system of equations based on the desired composition of the mixture. you should use 36 gallons of water and 54 gallons of methane to obtain a mixture of 90 gallons with a methane concentration of 60%.

Let's assume x represents the number of gallons of water and y represents the number of gallons of methane. We have the following information: The total volume of the mixture is 90 gallons: x + y = 90. The mixture should be 60% methane: (y / (x + y)) * 100 = 60. Simplifying the second equation: y / (x + y) = 0.6. Now we can solve the system of equations: From equation 1, we can express x in terms of y: x = 90 - y. Substituting this into equation 2: y / ((90 - y) + y) = 0.6. Simplifying further: y / 90 = 0.6. Solving for y: y = 0.6 * 90. y = 54. Now we can find x using equation 1: x = 90 - y. x = 90 - 54. x = 36. Therefore, you should use 36 gallons of water and 54 gallons of methane to obtain a mixture of 90 gallons with a methane concentration of 60%.

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Answer:

No they are not the same..

Explanation:

Absolute temperature is the temperature of an object on a scale where 0 is in the lowest possible energy state while the kelvin is a base unit of temperature.

Answer:

he is right, top right

Explanation:

The pair that could be used to construct a single redox electrode is option E, MnO2 and Mn2+.

Explanation:

Redox electrodes are made up of two different substances, one of which is in a reduced form, and the other is in an oxidized state.

There is an exchange of electrons between the two substances in the redox reaction. In a single redox electrode, the oxidized and reduced forms of the same substance are present.

Redox reactions involve oxidation and reduction of species. Oxidation involves loss of electrons, while reduction involves gain of electrons. Here, MnO2 and Mn2+ have an element in common, i.e., Mn.

The oxidation states of Mn in MnO2 and Mn2+ are +4 and +2, respectively. MnO2 can be reduced to Mn2+ by the addition of electrons. Therefore, MnO2 and Mn2+ can be used to construct a single redox electrode.

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Answer:

When you stir a spoonful of sugar into a glass of water, you are forming a solution.

Answer:

D.Cell wall

Explanation:

Cell wall is a distinct feature that is mainly seen in plant cells (mostly made of Cellulose) or in prokaryotic cells like bacteria.

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Acetic acid is the by product of production of aspirin. Aspirin crystals are formed after the acetic acid is removed through filtration of the acetic acid-water solution. Recrystallization from an ethanol/water solvent pair removes any trace levels of salicylic that are still present.

Acetylsalicylic acid (ASA), generally known as aspirin, is a nonsteroidal anti-inflammatory medication (NSAID) used to treat inflammation, fever, and/or pain as well as a blood thinner. Aspirin is used to treat a variety of inflammatory disorders, including Kawasaki disease, pericarditis, and rheumatic fever. 

Long-term usage of aspirin is also used to help those at high risk avoid further heart attacks, ischemic strokes, and blood clots.

The effects of pain or fever usually start to take effect after 30 minutes. While aspirin functions similarly to other NSAIDs, it also inhibits platelets' natural function.

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Answer:

there are 37 atoms

Explanation:

The formula for nickel(II) acetate tetrahydrate is Ni(C2H3O2)4. To calculate the number of atoms in the formula, we need to count the number of atoms of each element and then multiply each by the number of times it appears in the formula.

Ni: There is 1 Ni atom in the formula.

C: There are 8 C atoms (4 from each C2H3O2) in the formula.

H: There are 12 H atoms (3 from each C2H3O2) in the formula.

O: There are 16 O atoms (4 from each C2H3O2) in the formula.

Therefore, the total number of atoms in the formula is 1 + 8 + 12 + 16 = 37.

So there are 37 atoms in Ni(C2H3O2)4.

The oxyanion hole is a structural feature found in many enzymes, including chymotrypsin, that stabilizes the transition state of the reaction and enhances catalytic efficiency.

The oxyanion hole is formed by a cluster of amino acid residues that interact with the carbonyl group of the substrate and facilitate its deprotonation during catalysis.

In chymotrypsin, the oxyanion hole is formed by the backbone amide groups of two amino acids: serine 195 and glycine 193. While serine 195 is part of the catalytic triad (together with histidine 57 and aspartic acid 102), glycine 193 is not. Instead, glycine 193 is located near the catalytic triad and helps to orient serine 195 in the correct position for substrate binding and catalysis. Together, the oxyanion hole and catalytic triad form a highly efficient system for cleaving peptide bonds in proteins.

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The major product is 3-methyl-2-pentene and the minor product is 2-ethyl-1-butene.

The alkyl halide shown is 3-bromo-3-methyl pentane. We can see that it is a tertiary alkyl halide. The proportion of products formed during the reaction are determined by Markovnikov rule.

The two products of this reaction are; 3-methyl-2-pentene and 2-ethyl-1-butene. The major product is 3-methyl-2-pentene because it is formed from a more stable carbocation intermediate.  2-ethyl-1-butene is the minor product.

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The compositions of the intermetallic compounds A3B and AB3 are given as percentages of element A and element B, respectively.

Another approach to identifying element B would be to perform chemical analysis on small samples of the compounds. This would involve determining the elemental composition of the samples using techniques such as X-ray fluorescence (XRF) or inductively coupled plasma mass spectrometry (ICP-MS). From the elemental composition, element B could be identified based on its position in the periodic table and its known properties. However, the compositions do not provide enough information to determine the identity of element B.

In order to identify element B, additional information is needed. One possible way to identify element B is to compare the known properties of the compounds formed by A and B. For example, if A forms a cubic structure and B forms a tetragonal structure, then element B is likely zirconium (Zr). However, without additional information, it is not possible to definitively identify element B using only the given compositions of A3B and AB3.  

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A scientist investigated a type of bacterium and a type of virus.  The results of the investigation demonstrate that the dish with bacteria has live cell while the dish with virus present in host cell.

The term bacteria is defined as a large group of single-cell microorganisms. While some bacteria are hazardous, the majority have beneficial functions.

They are employed in industrial and medical procedures and sustain a wide variety of living forms, including both plant and animal life.

Thus, The results of the investigation demonstrate that the dish with bacteria has live cell while the dish with virus present in host cell.

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Answer:

The structures shown by dots and lines to give the exact number of electrons in the outer most shell is explained by Lewis Structures.

Explanation:

Lewis structures are those structures in which the diagram is shown using the electron representation. They are easy to understand as the diagram completely depicts where the electrons are shared and where they are transferred. The diagram also explains where there is a single bond and where there is a di covalent bond or tri covalent bond explaining where the single , double or triple electron pair is shared. The electrons are shown by dots or lines.

For example CCl₄ can be shown as follows

                  ..

               .. Cl..

  ..                               ..

..Cl..----------C----------..Cl..

                   ..

                .. Cl..

The picture shows that each chlorine has six electrons in its outer shell and then a pair of electron is shared with carbon forming a single covalent bond.

Similarly methane CH4 can also be shown.

The hydrogen has one electron and it shares an electron from carbon stabilising itself forming methane.

Answer:

There is a ozone layer because of the special atomphere and chemical conditions that takes place there. I think the consequences of that home area is the very low winter temperatures.

Answer:

There is a hole in the ozone layer because of the pollution on earth. Because of that the UV rays are easily entering the earth through that portion. The consequences of this can be cancers, global warming and disastrous storms.

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Answer:

Pull with less force, Add an apple to the basket, and Roughen the surface of the table to increase friction

Explanation:

Answer:

0.95 moles

Explanation:

I believe that this is the equation we are looking at since this is an acid- metal reaction, thus the products would be a salt and hydrogen gas (H₂):

Zn +2HCl → ZnCl₂ +H₂

The limiting reactant is the reactant that we do not have enough of for the reaction to continue. From the balanced equation, the mole ratio of Zn to HCl is 1: 2. This means that for every 1 mole of Zn, 2 moles of HCl is needed.

Let's calculate the number of moles of HCl needed to react with 0.95 moles of Zn.

Number of moles of HCl required

= 0.95 ×2

= 1.9 moles

Since we have 6.2 moles of HCl, HCl is in excess and thus Zn is the limiting reactant. For 6.2 moles of HCl, 3.1 moles of Zn would be needed but we only have 0.95 moles.

For every 1 mole of Zn, 1 mole of H₂ is produced.

Thus, since 0.95 moles of Zn has reacted,

number of moles of H₂ produced= 0.95 moles

Answer:

B 6NO  A 5N2  C 6H2O  D 4Nhd

Explanation:

The percentage of an organism's genetic information that is the same as that of the parent is 100%. During reproduction, genetic information is passed from the parent to the offspring.

This genetic information is stored in the form of DNA. Each parent contributes half of their genetic information to the offspring, resulting in the offspring inheriting 100% of the genetic information from their parents.

This process ensures that the offspring share many traits and characteristics with their parents.Genetic information refers to the hereditary material that is passed from parents to offspring. It contains the instructions necessary for the development, functioning, and characteristics of living organisms.

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Answer:

the flask feels warm

Explanation:

in exothermic reaction heat is leaving the system and entering the surroundings aka the flask

also i took the quiz

Answer:

CH³–C=CH——CH³–CH=CH²

Explanation:

THIS IS PROPYNE TO PROPENE

Answer:

I agree

Explanation:

For scientists working in classified areas, collaboration with university programs and researchers provides opportunities to expand and strengthen their science through the conduct of peer-reviewed, open literature research.