What is the rule of zero charge?

Answer:

Element 3

Explanation:

Properties of metals are:

- Being shiny

- Are good conductors of electricity

- Are good conductors of heat

- Have a high melting point

Element 3 has all of these properties, so it is most likely a metal.

Hope this helps!

Answer: 1 and 3

Explanation:

Atoms combine in the initial manner by transferring electrons among themselves because their particular nuclei are attracted to the electrons from other atoms. When the compounds being produced are at a lower energy than the original atoms, atoms combine to form compounds. The chemicals inside the reactants interact throughout hydrolysis reaction to create new substances.

Atoms create new substances by swapping electrons with each other rather than by gaining neutrons from each other. When two or more atoms share at least one pair of electrons, this is known as a covalent connection. Ionic bonds form when positive and negative bonds are attracted to each other and share a proton as a result .

element with one another in order to build a comprehensive electron shell, which increases stability. Subatomic particles may fill up the sell of electrons and then become permanent by sharing their topmost (valence) electrons.

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The correct terms to fill in the blanks are:

The melting point of a solid is the temperature at which the kinetic energy of the particles is sufficient to cause them to break free from their fixed positions.

At the melting point, the solid undergoes a phase change and transitions into a liquid state. The increased kinetic energy of the particles allows them to overcome the intermolecular forces holding the solid together, resulting in the transition from a solid to a liquid.

Kinetic energy, which may be seen in the movement of an item or subatomic particle, is the energy of motion. Kinetic energy is present in every particle and moving object. Examples of kinetic energy in action include a person walking, a baseball soaring through the air, a piece of food falling from a table, and a charged particle in an electric field. An object has no kinetic energy if it is not moving.

Potential energy, the other major form of energy, is present in stationary objects. When an object is propelled into motion by a force like gravity, its potential energy is transformed into kinetic energy. In a stretched rubber band, for instance, elastic potential energy is held; when the rubber band is released, the energy is changed to kinetic energy.

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Answer:

Kinetic

Explanation:

Answer:

hope this helps

Explanation:

Water was on earth with the dinosaurs and almost at the very start.

Water starts anywhere from clouds to ponds

I choose ponds, water evaporates from the sun and moves its way through the air being collected into clouds in the atmosphere, clouds are evaporated water molecules, then the water combines to form rain wich then end up on a hill and travel back to a water source or goes into the ground and makes groundwater and if there is enough rain overtime will form a pond.

Answer: Seismographs.

Explanation: These are used to monitor fluctuations in the Earth's crust.

The two liquids being measured when obtaining an absorbance spectrum are called the absorbance (A) and the transmittance (T) solutions.

Absorbance is measured using a spectrophotometer or microplate reader, that's an device that shines light of a special wavelength via a sample and measures the quantity of mild that the pattern absorbs.

Absorption spectra (additionally called UV-Vis spectra, absorbance spectra and electronic spectra) display the change in absorbance of a sample as a characteristic of the wavelength of incident light, and are measured the usage of a spectrophotometer.

Definition of absorption spectrum: an electromagnetic spectrum wherein a decrease in depth of radiation at precise wavelengths or ranges of wavelengths characteristic of an soaking up substance is manifested specially as a sample of darkish lines or bands.

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Answer:

0.184 mol

Explanation:

Look up molar masses for the elements that comprise H₃PO₄:

H = 1.008 g/mol

P = 30.97 g/mol

O = 15.99 g/mol

The molar mass of H₃PO₄ is a weighted sum of these (3 hydrogen + 1 phosphorus + 4 oxygen) that comes out to about 97.99 g/mol.

Then

(18 g H₃PO₄) × (1/97.99 mol/g) ≈ 0.1837 mol

Answer:

The correct option is;

d. Explicit knowledge

Explanation:

Explicit knowledge is the knowledge that can be easily articulated documented stored in a retrieval system accesses, transmitted and shared with others

Tacit knowledge is the skill developed by an individual based on actual experience such that such knowledge comprise of both facts and perspectives

Hence explicit knowledge and tacit knowledge are complementary

The operations performed by Kaia include documentation, storing in a retrieval system (her project report) and accessing what she documented, this is an example of explicit knowledge.

Answer:

A: A system of folded membranes

Explanation:

The endoplasmic reticulum is one of the organelles found in an eukaryotic cell. It is a membrane-bound organelle made up of two structures called CISTERNAE (sac) AND SHEET (membranous)

The endoplasmic reticulum is part of the endomembrane system, which is a system of folded membranes, which extends to the membrane that bounds the nucleus. It is of two types viz: rough endoplasmic reticulum and smooth endoplasmic reticulum.

The pillar of sustainability broken by recycling electronics in India is environmental sustainability. Implementing a law that restricts electronics recycling to the US would not necessarily be the most effective solution, as it overlooks the complex global dynamics of electronic waste management.

Recycling electronics in India often involves improper disposal methods, such as burning or dismantling without proper safety measures. This leads to environmental pollution, including the release of hazardous substances into the air, soil, and water, thus violating the principle of environmental sustainability.

However, simply mandating that electronics can only be recycled in the US may not be the most optimal solution. Electronic waste is a global issue, and restricting recycling to a single country disregards the fact that electronic products are manufactured and consumed worldwide. A more comprehensive approach to addressing electronic waste would involve international cooperation, strict regulations, and monitoring of recycling practices to ensure they meet environmental standards.

Efforts should focus on improving recycling practices globally, including promoting responsible electronic waste management, developing sustainable recycling infrastructure in multiple countries, and encouraging the adoption of safe and environmentally friendly recycling practices. This approach would foster global sustainability and address the challenges associated with electronic waste disposal more effectively than a geographically limited restriction.

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Gasohol is a blend of gasoline and ethanol. To determine the maximum work that can be obtained by burning 1.003 mol of C2H5OH at 25°C and 1 atm, the Gibbs free energy equation can be utilized. What is Gibbs free energy equation? Gibbs free energy equation is a thermodynamic equation that quantifies the maximum quantity of work that may be obtained during a chemical reaction. T

he equation is as follows: ΔG = ΔH - TΔSThe values of ΔH and ΔS are calculated from thermodynamic tables or by calculating the enthalpy and entropy of the products and reactants, and the temperature, T, is usually specified in Kelvin. The change in Gibbs free energy, ΔG, is the maximum amount of energy that can be obtained from the reaction in the form of useful work if the reaction takes place at constant pressure and temperature. The reaction will proceed spontaneously if ΔG is negative. And if ΔG is positive, the reaction will not take place spontaneously. The solution to this problem is shown below:

First, let's figure out how much heat is produced when one mole of C2H5OH is burnt.ΔHrxn = [2(moles of CO2)(-393.5 kJ/mol) + 3(moles of H2O)(-285.8 kJ/mol)] - [(moles of C2H5OH)(-277.7 kJ/mol)]ΔHrxn = [2(2.006 mol)(-393.5 kJ/mol) + 3(3.009 mol)(-285.8 kJ/mol)] - [1.003 mol(-277.7 kJ/mol)]ΔHrxn = -2043.5 kJ/mol. Now, we'll figure out the entropy change for the reaction.ΔSrxn = [2(moles of CO2)(213.8 J/mol-K) + 3(moles of H2O)(69.9 J/mol-K)] - [(moles of C2H5OH)(160.7 J/mol-K)]ΔSrxn = [2(2.006 mol)(213.8 J/mol-K) + 3(3.009 mol)(69.9 J/mol-K)] - [1.003 mol(160.7 J/mol-K)]ΔSrxn = -104.3 J/mol-KThe temperature in Kelvin is 25°C.273 + 25 = 298 KΔG = ΔH - TΔSΔG = -2043.5 kJ/mol - (298 K)(-104.3 J/mol-K)/1000ΔG = -2032.6 kJ/mol. Therefore, the maximum work that can be obtained by burning 1.003 mol of C2H5OH is 2032.6 kJ/mol, which is the value of ΔG.

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Answer:

Br

Explanation:

When 2.45 grams of sugar are dissolved in 200.0 grams of water, the mass percentage of sugar in the solution is 1.21%.

Mass Percent-

The concentration of chemical substances in solutions can be stated in a variety of ways. While the molar concentration refers to the quantity of moles of the solute in the solution, the mass concentration refers to the mass of the solute per unit volume of the solution. The mass percent of the solute in the solution is expressed as a percentage. While molar and mass concentrations have units of measurement, mass percent has none.

The total mass is 202.45 gms when 2.45 grams of sugar are dissolved in 200.0 grams of water. According to the definition and idea of the mass percent, such a solution would have a sugar content of (2.45 /202.45) 100 = 1.21% sugar.

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Isoelectronic species have the same number of electrons. To determine which option is isoelectronic with S^2-, let's first find the number of electrons in S^2-. Sulfur (S) has 16 electrons in its neutral state. With a 2- charge, it gains 2 extra electrons, making it have 18 electrons.

Now, let's compare the given options:

a. Ar (Argon) has 18 electrons in its neutral state, so it is isoelectronic with S^2-.

b. Ca2+ (Calcium ion) has 20 electrons in its neutral state. With a 2+ charge, it loses 2 electrons, making it have 18 electrons. Thus, it is isoelectronic with S^2-.

c. Al3+ (Aluminum ion) has 13 electrons in its neutral state. With a 3+ charge, it loses 3 electrons, making it have 10 electrons. It is not isoelectronic with S^2-.

d. K (Potassium) has 19 electrons in its neutral state. It is not isoelectronic with S^2-.

So, the species isoelectronic with S^2- are a. Ar and b. Ca2+.

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The major side effect of ingesting activated charcoal is called as  black stools, option D.

Chemicals can be captured in the pores of activated charcoal. In order to treat some toxins that have been ingested, it is normally administered orally. For additional purposes, the evidence is scant.

Peat, coal, wood, coconut shells, or petroleum can all be used to make charcoal. Charcoal is heated in the presence of a gas to create activated charcoal. The charcoal develops many interior pores as a result of this process. Activated charcoal may trap pollutants thanks to its pores.

To treat poisoning, activated charcoal is frequently employed. Additionally, it is claimed to treat excessive cholesterol, hangovers, and upset stomach, although the majority of these applications lack solid scientific backing.

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The major side effect of ingesting activated charcoal is d) black stools.

While some individuals may experience mild abdominal discomfort, vomiting, or headaches, these side effects are generally less common and less severe. However, it is important to note that activated charcoal should only be consumed under the guidance of a healthcare professional, as it can interact with certain medications and may not be effective for all types of poisoning or overdose. The major side effect of ingesting activated charcoal is d) black stools.  it's crucial to remember that activated charcoal should only be ingested with a doctor's supervision because it may mix with some medications and isn't always helpful for treating poisoning or overdose. Black stools are the main adverse impact of consuming activated charcoal.

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At STP, the volume of oxygen of mass 250g is found to be 175mL.

Volume is the amount of space occupied by an item or substance. Volume is a measurement of how much 3-dimensional space an object occupies. Volume is the measurement of a limited quantity of area at a specific end.

Mass is a measurement of the quantity of matter in an item or substance. Mass is the physical quantity that represents the amount of matter in an object's body. The amount of weight accommodated in an item or stuff is measured in mass.

Density - The amount of space taken up by an item or substance (its volume) in proportion to the amount of matter in that thing or substance (its mass).

Given:

Mass = 250g = 0.25kg

Density at STP = 1.4291g/L

To find:

Volume = ?

Formula:

Density = Mass / Volume

Calculations:

Volume = Mass / Density

Volume = 0.25 / 1.4291

Volume = 0.175L

Volume = 175mL

Result:

The volume of oxygen of mass 250g is found to be 175mL at STP.

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Answer:

Constellations Changing Positions!!!!       :D  <----(smiley face)

Explanation:

Due to the earth's rotation, stars appear to move. As the Earth rotates from west to east, the stars appear to rise in the East, moving across south to set in the west. The Sun will appear to move through the stars, making one complete circuit of the sky in 365 days!!

(yes i'm literally 9+6 years old and idek why i'm doing this XD )

Answer:

Constellations Changing Positions. Due to the earth's rotation, stars appear to move. As the Earth rotates from west to east, the stars appear to rise in the East, moving across south to set in the west. The Sun will appear to move through the stars, making one complete circuit of the sky in 365 days.

Explanation:

(Found this online, hope it helps!)

Answer:

D

Explanation:

If the atom is neutral, the sum of the core and valence electrons is the same as the number of protons, which is the atomic number of the element. So if the sum of the core and valence electrons in a neutral atom equals 25 , that is the number of protons in the atomic nucleus, and the atomic number of the element.

The number of valence electrons plus core electrons is the atomic number.

The variety of protons, neutrons, and electrons in an atom may be determined from a set of easy guidelines. The wide variety of protons within the nucleus of the atom is equal to the atomic quantity (Z). The quantity of electrons in an impartial atom is identical to the number of protons.

The variety of protons in a nucleus is called the atomic variety and usually equals the number of electrons in orbit approximately that nucleus (in a nonionized atom). For this reason, all atoms which have an equally wide variety of protons and the atomic range are atoms of the equal element.

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False, Asbestos is a naturally occurring mineral fiber that was commonly used in various industries due to its heat resistance, strength, and insulating properties.

Asbestos does not necessarily need to be removed if it will not be disturbed or pose a risk to human health. Asbestos-containing materials that are in good condition and undisturbed are generally considered safe. However, if asbestos-containing materials are damaged, deteriorating, or will be disturbed during renovation or demolition activities, it is necessary to take appropriate precautions, which may include professional removal or encapsulation, to prevent the release of asbestos fibers into the air. The decision to remove asbestos should be based on an assessment of its condition, potential for disturbance, and adherence to local regulations and guidelines.

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The main reservoirs of the carbon cycle are the atmosphere, oceans, land (including vegetation and soils), and fossil fuels. In these reservoirs, carbon exists in both inorganic and organic forms.

The inorganic carbon cycle involves the exchange of carbon dioxide (CO2) between the atmosphere and oceans through processes like photosynthesis and respiration.

Organic carbon, on the other hand, is found in living organisms, dead organic matter, and soil organic matter. It is cycled through processes such as decomposition and consumption by organisms. The interactions between the inorganic and organic carbon cycles occur primarily in the biosphere, where photosynthesis converts inorganic carbon into organic carbon compounds. While inorganic carbon is primarily in the form of CO2, organic carbon is present in complex organic molecules. Both forms of carbon play crucial roles in energy transfer, nutrient cycling, and climate regulation.

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Answer:

Im not smart either but im pretty sure its D because its a pie chart so its asking how many and pie charts tell you how much something has

Explanation:

Quick Sort is the sorting algorithm that has the following time complexity profile i.e., best case: o(n log n).

A Divide and Conquer method is Quick Sort. It chooses an element to act as a fulcrum and divides the supplied array around it. There are numerous variations of Quick Sort that select pivot in various methods.

1)As a rule, choose the first component as the center.

2)Always choose the final component as the center 

3)Choose a random number as a pivot element.

4)Decide on median as your center.

Partitioning is Quick Sort's primary operation. The partition procedure works best when it always chooses the middle element as the pivot. 

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Assume that every gas in the list will act perfectly. Using the mole fraction of O2 and the specified pressure, the partial pressure of O2 may be computed (P).

What is specified?

The following diagram illustrates the mathematical link between partial pressure of oxygen (P1) and oxygen mole fraction (X1):

P₁=X₁P

By dividing the total number of moles of gases (0.76 + 0.18 + 0.031 + 0.026) by the number of moles of O2 (0.18 mol), it is possible to determine the mole fraction of O2 as follows:

X₁= 0.18 / (0.76+0.18+0.031+0.026)= 0.1805

In this manner, the partial pressure of O2 (P1) is determined:

P1=0.1805x739mmHg, or 133.4mmHg

According to the estimate above, the partial pressure of oxygen is almost equal to 130 mm Hg. As a result, option C is the best one.

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