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Answer:

12 moles of CO

Explanation:

According to Avogadro, one mole of a substance, contains the same number of elementary entities as 12g of carbon-12. Now the number of elementary entities (atoms, molecules, ions, particles etc) in any substance is given by the Avogadro's constant.

Now since 1 mole of a substance contains Avogadro's number of atoms, it means that the substance with the highest number of moles will have the highest number of atoms.

With this in mind we can see that 12 moles of CO is expected to contain 72.24 ×10^23 atoms of CO. Hence the answer.

Answer:

c. 11 moles of N2O.

Explanation:

Hello,

In this case, for each substance, we use the Avogadro's number to compute the number of atoms in the given sample:

a.

\(atoms \ C=9molCO_2*\frac{1molC}{1molCO_2} *\frac{6.022x10^{23}atoms\ C}{1molC} =5.4x10^{24}atoms\ C\)

\(atoms \ O=9molCO_2*\frac{2molO}{1molCO_2} *\frac{6.022x10^{23}atoms\ O}{1molO} =1.1x10^{25}atoms\ O\)

\(Total\ atoms=1.1x10^{25}+5.4x10^{24}=1.64x10^{25}atoms\)

b.

\(atoms \ Xe=10molXe *\frac{6.022x10^{23}atoms\ Xe}{1molXe} =6.022x10^{24}atoms\)

c.

\(atoms \ N=11molN_2O*\frac{2molN}{1molN_2O} *\frac{6.022x10^{23}atoms\ N}{1molN} =1.3x10^{25}atoms\ N\)

\(atoms \ O=11molN_2O*\frac{1molO}{1molN_2O} *\frac{6.022x10^{23}atoms\ O}{1molO} =6.6x10^{24}atoms\ O\)

\(Total\ atoms=1.3x10^{25}+6.6x10^{24}=2.0x10^{25}atoms\)

d.

\(atoms \ C=12molCO_2*\frac{1molC}{1molCO_2} *\frac{6.022x10^{23}atoms\ C}{1molC} =7.2x10^{24}atoms\ C\)

\(atoms \ O=12molCO_2*\frac{1molO}{1molCO_2} *\frac{6.022x10^{23}atoms\ O}{1molO} =7.2x10^{24}atoms\ O\)

\(Total\ atoms=7.2x10^{24}+7.2x10^{24}=1.44x10^{25}atoms\)

Thus, we notice 11 moles of N2O have the greatest number of atoms.

Best regards.

Based on the data and calculations obtained, it can be concluded that the hypothesis stating, "If the density of the object is 19.32 g/ml, then the object is gold" is not supported.

To support this conclusion, the data and calculations regarding the density of the object should be analyzed. If the calculated density of the object differs significantly from the expected value of 19.32 g/ml, it indicates that the object is not gold.

The accuracy and precision of the data can be assessed by comparing the calculated density with the expected density value. If the calculated density is close to the expected value, it suggests high accuracy. Additionally, if multiple measurements of density yield consistent results, it indicates high precision.

Further experimentation could involve additional tests to determine the identity of the object. These tests could include assessing other physical or chemical properties such as melting point, electrical conductivity, or reactivity with certain substances.

Possible sources of error in the experiment could include instrumental errors in measuring the mass or volume of the object, contamination of the object, or inaccuracies in the known density of gold used for comparison. These factors could contribute to deviations between the calculated and expected densities.

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Answer:

All metals have a shiny appearance (at least when freshly polished); are good conductors of heat and electricity; form alloys with other metals; and have at least one basic oxide.

Explanation:

Answer:

All metals have a shiny appearance (at least when freshly polished); are good conductors of heat and electricity; form alloys with other metals; and have at least one basic oxide.

Explanation:

In an ionization counter, radioactive emissions collide with gas particles, producing ion pairs, which can be detected as an electric current.

The radiation ionizes the gas atoms or molecules, creating charged particles that are then collected as a current, allowing for the detection and measurement of radioactivity.

On the other hand, a scintillation counter detects radioactive emissions by its ability to excite atoms and cause them to emit photons (light). The radiation interacts with certain materials, such as scintillators, which absorb the energy and re-emit it as visible light. The emitted light is then converted into an electric current through the photoelectric effect or the use of photomultiplier tubes, enabling the detection and measurement of radioactivity based on the emitted light intensity.

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Answer:

Option d is correct

Explanation:

The basis of the VSEPR model of molecular bonding is that to minimize repulsions, electron domains in the valence shell of an atom arrange on their own.

According to VSEPR theory, if there are two electron domains on a central atom, they will be arranged such that the angles between the domains are 180°

Explanation:

A compound's empirical formula tells you the smallest whole number ratio ,The molar mass tells you what the total mass of one mole

Answer: brown

Explanation:

because red+green=brown

Answer:

C) Orion spur.

The Orion Arm is a minor spiral arm of the Milky Way Galaxy that is 3,500 light-years across and approximately 10,000 light-years in length, containing the Solar System, including Earth.

Answer:

0.75 g/cm³

Explanation:

Given data:

Mass of wooden block =  180 g

Length of block = 10 cm

Width of block = 6 cm

Height or thickness = 4 cm

Density of block = ?

Solution:

Volume of block = height × length × width

Volume of block = 4 cm × 10 cm× 6 cm

Volume of block = 240 cm³

Density of block:

density = mass/ volume

d = 180 g/ 240 cm³

d = 0.75 g/cm³

Answer:

Chemical bonding, any of the interactions that account for the association of atoms into molecules, ions, crystals, and other stable species that make up the familiar substances of the everyday world.

Explanation:

Have a nice day:)

Answer: A connection between two surfaces or objects that have been joined together, especially by means of an adhesive substance, heat, or pressure.

Explanation: The bond may result from the electrostatic force or attraction between oppositely charged icons as in iconic bonds or through the sharing of electrons as in covalent bonds.

Answer:

Nerve or muscle damage in the eye might cause double vision. Each eye creates its own image of the environment. The brain combines the representations from each eye and perceives them as one clear picture. Damage to the muscles that move the eyes or the nerves that control eye movement can create a double image.

Explanation:

Fossils can form in three different ways is Preservation of original remains, Castings and permineralization.

The remnants or evidence of prehistoric life that have been successfully preserved by natural processes are known as fossils. Shells, bones, animal or microbe impressions in stone, exoskeletons, items stored in amber, petrified wood, coal, hair, oil, and Genetic traces are a few examples of fossils.

They provide as a direct link to historical ways of life, ecosystems, and climatic conditions. They show the historical evolution of life, the environment, and the climate, as well as the responses of living organisms to those changes. These lessons are particularly important at this time, as the contemporary world is evolving more and more. Nothing can ever replace a fossil.

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The structure of the organic product for the reaction of D-fructose depends on the specific reaction conditions and reactants involved.

Without additional information on the reaction, it is challenging to provide a specific product structure.

D-fructose is a monosaccharide, a type of carbohydrate. It has a five-membered ring structure known as a furanose ring. In reactions, D-fructose can undergo various transformations, such as oxidation, reduction, glycosylation, or isomerization, leading to different products.

To determine the structure of the organic product(s), it is necessary to specify the reaction conditions and reactants involved. This information would allow for a more accurate prediction of the resulting product(s) and their structures.

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Answer:

C.) The number after it is between 5 and 9

Explanation:

If the digit to the right is less than five, you must leave the digit you want to round to as it is.

But, if the digit to the right is greater than or equal to five, you must increase the value of the digit you're rounding to by one. And any remaining digits before the decimal point become zeros, and any that are after the decimal point are dropped.

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Catalytic Cracking: Catalytic cracking is a process used to break down heavier hydrocarbon molecules into lighter fractions such as gasoline.

Hydrocracking: Hydrocracking is a process that combines catalytic cracking with hydrogenation. It is used to convert heavy hydrocarbons into lighter, more valuable products. Catalysts, such as metal sulfides or noble metals supported on a porous material, are employed to promote the cracking reactions and enable the addition of hydrogen to saturate unsaturated hydrocarbons.

Catalytic Reforming: Catalytic reforming is a process used to convert low-octane naphtha into high-octane gasoline blending components. Catalysts based on platinum or platinum-rhenium are utilized to promote the isomerization, dehydrogenation, and cyclization reactions that enhance the octane rating of the naphtha.

Hydrotreating: Hydrotreating is a process that removes impurities, such as sulfur, nitrogen, and metals, from petroleum feedstocks. Catalysts containing metals like nickel or molybdenum supported on alumina or other materials are used to promote the hydrogenation of these impurities, resulting in cleaner and more environmentally friendly fuels.

Desulfurization: Desulfurization is a specific type of hydrotreating that focuses on the removal of sulfur compounds from petroleum products, particularly diesel fuel. Catalysts based on metals such as cobalt and molybdenum are employed to facilitate the hydrodesulfurization reaction, which converts sulfur compounds into hydrogen sulfide.

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The terms of historical events, movements, court cases, and concepts from the late 19th and early 20th centuries in the United States, including the Great Railroad Strike, the Populist Party, the Homestead Act, Jim Crow laws, and concepts like primary sources, context, and complexity.

1. The great railroad strike of 1876 was a major labor conflict in the United States sparked by wage cuts for railroad workers, resulting in widespread strikes and violent clashes between workers and the military.

2. The Populist Party, also known as the People's Party, was a political party in the United States during the late 19th century that aimed to represent the interests of farmers and laborers against the power of big business and financial elites.

3. The Populist Party platform of 1892 was a political document outlining the party's stance on various issues, including advocating for the free coinage of silver, a progressive income tax, government ownership of transportation and communication systems, and direct election of senators.

4. The U.S. presidential race of 1896 was a significant election that pitted the Republican candidate William McKinley against the Democratic candidate William Jennings Bryan. It was marked by intense debates over economic policies, particularly regarding the gold standard and free silver.

5. Wounded Knee refers to the massacre that occurred in 1890, where U.S. cavalry troops killed hundreds of Lakota Sioux, including women and children, marking the end of armed resistance by Native Americans in the West.

6. The Homestead Act of 1862 was a U.S. federal law that granted settlers ownership of land in the West if they improved and cultivated it, encouraging westward migration and the development of agriculture.

7. The Turner Thesis, put forth by historian Frederick Jackson Turner in 1893, argued that the frontier experience had played a fundamental role in shaping the American character and democracy, emphasizing the importance of westward expansion.

8. The Haymarket Affair refers to a labor protest rally held in Chicago in 1886, which turned violent when a bomb exploded, resulting in casualties and subsequent trials and executions of anarchist labor activists.

9. Hammer v. Dagenhart was a U.S. Supreme Court case in 1918 that ruled against a federal law prohibiting the interstate shipment of goods produced with child labor, asserting that it exceeded Congress' power to regulate commerce.

10. Plessy v. Ferguson in 1896 was a landmark U.S. Supreme Court case that upheld racial segregation laws, establishing the "separate but equal" doctrine and allowing for the legal segregation of public facilities based on race.

11. Ida B. Wells was an African-American journalist and activist who campaigned against lynching and advocated for civil rights and women's suffrage in the late 19th and early 20th centuries.

12. Convict leasing was a system prevalent in the Southern United States after the Civil War, where prisoners, mostly African Americans, were leased to private companies and forced to work under harsh conditions, perpetuating a form of involuntary servitude.

13. Jim Crow laws were state and local laws in the United States enacted from the late 19th century to the mid-20th century that enforced racial segregation and discrimination against African Americans.

14. A primary source refers to an original document or firsthand account of an event, providing direct evidence or information about a particular subject.

15. A secondary source refers to a document or account that analyzes, interprets, or summarizes primary sources, often providing a scholarly or historical perspective on a given topic.

16. Change refers to the process of transformation or alteration over time, whether in social, political, economic, or cultural aspects.

17. Context refers to the circumstances or conditions that surround an event, idea, or statement, providing a framework for understanding its meaning or significance.

18. Contingency refers to the idea that events or outcomes are dependent on specific circumstances or factors and may not have occurred under different conditions.

19. Causality refers to the relationship between cause and effect, asserting that one event or factor produces or influences another.

20. Complexity refers to the state of being intricate, multifaceted, or having multiple interconnected elements or factors that contribute to a situation or phenomenon, often making it difficult to fully understand or predict.

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The percent composition of the carbon in the C₆H₁₂O₆ is 40 %.

The chemical compound is  C₆H₁₂O₆.

The molar mass of the compound  C₆H₁₂O₆ = 180 g/mol

The mass of the carbon = 12 g

The percent composition is as follows :

Percent composition of the carbon = ( mass of the carbon / total mass of the compound ) × 100 %

Percent composition of the carbon = ( 72 / 180 ) × 100 %

Percent composition of the carbon  = 40 %

Thus the percentage composition if the carbon is 40 percent in the chemical compound  C₆H₁₂O₆ that is glucose.

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The correct answer is A. "N₂" represents two nitrogen atoms that have formed a molecule.

N₂ refers to a diatomic molecule composed of two nitrogen atoms bonded together by a strong triple covalent bond. Nitrogen (N) is an element with an atomic number of 7, meaning it has seven protons in its nucleus.
Each nitrogen atom has five valence electrons in its outermost electron shell. To achieve a stable electron configuration, two nitrogen atoms can share three pairs of electrons, resulting in the formation of the N₂ molecule.
Option B is incorrect because compounds are formed when different elements combine chemically, whereas N₂ consists of only one element, nitrogen. Option C is incorrect because the atomic number of nitrogen is 7, not 2. Option D is incorrect because the atomic mass of nitrogen is approximately 14 atomic mass units (AMU), not 2.
Therefore, N₂ represents two nitrogen atoms that have bonded together to form a molecule, which is the most accurate description among the given options.

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Answer: The volume of product formed is 0.26 L

Explanation:

\(\text{Moles of solute}=\frac{\text{given mass}}\times{\text{Molar Mass}}\)    

\(\text{Moles of} H_2=\frac{0.02g}{2g/mol}=0.01moles\)

\(2H_2(l)+O_2(l)\rightarrow 2H_2O(g)\)

As \(O_2\) is the the excess reagent, \(H_2\) is the limiting reagent as it limits the formation of product.

According to stoichiometry :

2 moles of \(H_2\) give = 2 moles of \(H_2O\)

Thus 0.01 moles of \(H_2\) will give =\(\frac{2}{2}\times 0.01=0.01moles\)  of \(H_2O\)

According to ideal gas equation:

\(PV=nRT\)

P = pressure of gas = 101.325 kPa = 1 atm

V = Volume of gas = ?

n = number of moles = 0.01

R = gas constant =\(0.0821Latm/Kmol\)

T =temperature =\(40^0C=(40+273)K=313K\)

\(V=\frac{nRT}{P}\)

\(V=\frac{0.01mol\times 0.0821L atm/K mol\times 313K}{1atm}=0.26L\)

Thus the volume of product formed is 0.26 L

Answer:

no.

Explanation:

Iron l is said to have a high permeability. High coercivity, high retentivity, and high permeability materials make up the permanent magnets. An object made of a substance that has been magnetized and produces its own persistent magnetic field is referred to as a permanent magnet.

In contrast to an electromagnet, which is made of a coil of the wire wrapped around a ferrous core and needs an electric current to create a magnetic field, a permanent magnet's magnetism is "always on" and it creates its own permeability magnetic field. A common example is a refrigerator magnet used to the keep notes on the door of the refrigerator.

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The most likely reason why the potato chunks gained mass is that water entered the potato cells.

The process of Osmosis allows water to pass through the semi-permeable membrane of potato cells.

This happens when the potato cells have less water than the material around them which then leads to water entering the cells to balance the water concentration.

The potato cells will expand and have more mass as a result.

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Answer:

Dalton's atomic model and Rutherford model

Explanation:

There were differences in the models:

Thompson's experiment showed that atoms contained tiny negatively charged particles called electrons.

On the other hand, Rutherford gold experiment led to the conclusion that the atom is a empty space with tiny, dense and positively charged nucleus.

Dalton thought that atoms were the smallest units of matter that could not be broken down further. This assumption continued to hold until it was later discovered that the atom was composed of subatomic particles.

The aluminum bar is cooling through an exothermic process, which means that heat is being released from the bar and being transported to the surroundings. This is indicated by the negative sign of the heat change.

The aluminum bar is cooling through an exothermic process, which means that heat is being released from the bar and being transported to the surroundings. This is indicated by the negative sign of the heat change (-14.2 kJ). This is due to the metal bar losing heat as it cooled down because the ultimate temperature (25.0°C) is lower than the initial temperature (70.0°C).

we can use the formula:

Q = m * c * ΔT

where Q = heat change, m = mass of the aluminum bar, c = specific heat capacity of aluminum, and ΔT = change in temperature.

The specific heat capacity of aluminum is 0.903 J/g·°C.

So, plugging in the values, we get:

Q = (350.0 g) * (0.903 J/g·°C) * (25.0°C - 70.0°C)

Q = -14,175 J

The negative sign indicates that heat is being lost by the aluminum bar,

To convert -14,175 J to kJ, we divide by 1000:

-14,175 J = -14.175 kJ

Rounding to one decimal place, we get:

-14.175 J ≈ -14.2 kJ

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The total charge that flows while the battery is being charged is approximately 193,939.39 Coulombs.

To calculate the total charge that flows while the battery is being charged, we can use the relationship between electrical energy, potential difference, and charge.

The electrical energy (E) stored in the battery is given as 64 mega Jules (64 MJ). The potential difference (V) provided by the battery is 330 volts. We know that the energy (E) is equal to the product of the potential difference (V) and the charge (Q):

E = V * Q

Since the charging process is 100% efficient, all the electrical energy supplied is stored in the battery. Therefore, we can rearrange the equation to solve for the charge (Q):

Q = E / V

Substituting the given values, we have:

Q = 64 MJ / 330 V

To perform the calculation, we need to convert mega Jules (MJ) to joules (J) since the SI unit of energy is joules. One mega Joule is equal to 1 million joules:

Q = (64 * 10^6 J) / 330 V

Calculating the division:

Q ≈ 193,939.39 Coulombs

Therefore, the total charge that flows while the battery is being charged is approximately 193,939.39 Coulombs.

This value represents the quantity of electric charge transferred during the charging process, and it indicates the amount of electricity that enters the battery.

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Answer:

C  Which model is composed of electrically charged particles?

Explanation:

The best question to resolve and determine the model which is plasma is to find one that is composed of electrically charged particles.

Plasma is one of the states of matter which is characterized by ions and other charged particles.

Matter is anything that has weight and occupies space.

There are four known states of matter which are:

Plasma is the only state of matter made up of charged particles.

Answer: 32,814

Explanation:

The subscript 4 in [Cu(NH3)4]2+ indicates the B)coordination number of Cu2+.

Coordination number refers to the number of ligands attached to the central metal ion in a coordination complex. In the given complex, Cu2+ is the central metal ion and it is coordinated to four ammonia (NH3) ligands.

The subscript 4 in [Cu(NH3)4]2+ indicates the number of NH3 ligands attached to the Cu2+ ion, which is the coordination number of Cu2+. The oxidation number of Cu in this complex is +2, which is indicated by the Roman numeral II in the formula. Therefore, the correct answer is B.

Answer:

Elements

Explanation:

I just did this