what makes an element distinct? a. the number of protons b. the number of neutrons c. the number of electrons d. the total mass of all the particles e. none of these

Answer:

D

Explanation:

The temperature increases

The phase of water at 0.5 atm and 100°C is gaseous phase.

Water exists in three different phases such as liquid, gas, and solid.

The phase of the given water can be determined using phase diagram at standard temperature and pressure as shown in the image uploaded.

At 0.5 atm and 100 °C, the water is still in vapour or gaseous phase.

Thus, the phase of water at 0.5 atm and 100°C is gaseous phase.

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The boiling points increase in the following order: \(CH_4\) < \(CH_3CH_3\) < \(H_2O\).

\(CH_4\) (methane) - lowest boiling point: Methane consists of simple nonpolar covalent bonds, and its intermolecular forces are London dispersion forces. These forces are relatively weak compared to other intermolecular forces.

\(CH_3CH_3\) (ethane) - intermediate boiling point: Ethane also consists of nonpolar covalent bonds, but its molecular structure is slightly larger and more complex than methane. Therefore, it experiences slightly stronger London dispersion forces, resulting in a higher boiling point than methane.

\(H_2O\) (water) - highest boiling point: Water molecules are polar due to the presence of electronegative oxygen and hydrogen atoms. This polarity leads to hydrogen bonding, which is a strong intermolecular force. Hydrogen bonding significantly increases the boiling point of water compared to the hydrocarbons methane and ethane.

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Answer:

CH4+2O2→CO2+2H2O 

Explanation:

CH4+2O2→CO2+2H2O 

For a sample with N particles and a decay constant λ, the decay rate is:

(c) Directly proportional to both λ and N

Radioactive decay (as well known as nuclear decay, radioactivity, radioactive disintegration, and nuclear disintegration) is the radiation-induced loss of energy in an unstable atomic nucleus. Radioactive materials contain unstable nuclei.

Alpha decay (α-decay), beta decay (β-decay), and gamma decay (γ-decay) are the three most common types of decay, all of which involve the emission of one or more particles.

The weak force governs beta decay, while electromagnetism and nuclear force govern the other two. Electron capture is a type of common decay in which an unstable nucleus captures an inner electron from one of the electron shells.

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Translation   is the process of converting the language of the nucleic acids that is nucleotides to the language of proteins that is amino acids.

The process of the conversion of the nucleic acids that is nucleotides to the language of proteins that is amino acids is called as the translation. In the translation process , the strands of the protein is produced from mRNA molecule. The mRNA is the nucleic acid molecule which formed by the help of the multiple nucleotides that is present together.

The formation of the protein strands is the process of the protein synthesis. It is based on the sequence of mRNA molecule.

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Answer:

cactus

Explanation:

Its a plant so it makes it own food

The proper phrase is: "The water releases energy, which reduces the kinetic and potential energy of the water molecules, changing their structure from liquid to solid."

What is Potential Energy?

Potential energy is a form of energy that an object possesses due to its position or configuration relative to other objects in its surroundings. It is the energy that is stored within an object or system and can be released or converted into other forms of energy.

Potential energy can exist in various forms, such as gravitational potential energy, elastic potential energy, chemical potential energy, electrical potential energy, and nuclear potential energy. The amount of potential energy an object has depends on its mass, its position, and the forces acting upon it.

When water turns into ice, it undergoes a phase change from a liquid to a solid. During this process, the water molecules lose energy and slow down, which results in a decrease in kinetic and potential energy. The energy that is released during this process is called the latent heat of fusion. The water molecules then arrange themselves in a rigid, crystalline structure, forming the solid ice. Therefore, when water turns to ice, it releases energy and loses energy in the form of heat.

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\(F_{2}\) and \(Cl_{2}\) are gases but \(Br_{2}\) is a liquid and \(I_{2}\) is a solid.

Each substance's molecules are drawn to one another by dispersion (London) intermolecular forces. The equilibrium between the kinetic energy of the molecules and their intermolecular attractions determines whether a substance is solid, liquid, or gas.

The electrons in fluorine are firmly bound to the nuclei. The London dispersion forces are comparatively weak because the electrons have little opportunity to stray to one side of the molecule.

The electrons are farther away from the nuclei when we transition from fluorine to iodine, allowing the electron clouds to more easily distorted. The forces of London's dispersion get ever greater.

The molecules will all become solids at a low enough temperature. They will all become gases if the temperature is high enough. Fluorine and chlorine are only gases between \(7^{0}\)C and \(59^{0}\)C, but bromine and iodine are solids at all other temperatures.

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The wooden tool is approximately 17,161 years old. This is calculated based on the fact that carbon-14 (C-14) has a half-life of 5730 years and the wooden tool contains 12.5% of the original C-14 content.

Carbon-14 (C-14) is a radioactive isotope of carbon that is present in the Earth's atmosphere. When living organisms, such as trees, take in carbon dioxide from the atmosphere, they incorporate a certain amount of C-14 into their tissues.

After the organism dies, the C-14 starts to decay, and its concentration decreases over time.

The half-life of C-14 is 5730 years, which means that after 5730 years, half of the initial C-14 content will have decayed.

Using this information, we can calculate the age of the wooden tool.

Since the wooden tool has 12.5% of the original C-14 present, it means that it has gone through approximately three half-lives (50% -> 25% -> 12.5%).

To find the number of years, we multiply the half-life by the number of half-lives:

5730 years/half-life × 3 half-lives = 17,190 years

Therefore, the wooden tool is approximately 17,161 years old, assuming a constant decay rate of C-14 and that the initial C-14 concentration was at the same level as in the atmosphere.

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The density (mass per volume) of most liquids increases as the temperature is lowered.

When the temperature is lowered, most liquids become denser (mass per volume). Density decreases as temperature rises more. Density rises with a drop in temperature.

Most liquids expand in volume as the temperature rises, which causes the density of the liquids to decrease. Similar to this, as temperature drops, most liquids lose volume, increasing density.

The molecules of a liquid or gas move more quickly, collide, and spread apart when it is heated. The molecules take up more space because they are dispersed widely. Their density is lower. Whenever a liquid or gas is cooled, the opposite happens.

When a substance is heated, the molecules move faster and slightly farther apart, taking up more space and causing the density to decrease. When something is cooled, the molecules slow down and get a little closer together, taking up less space and becoming denser.

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Wine was produced 37 years ago (1984 as usual year 15,2021) that is shown in the calculations below.

Reaction rate is calculated using the formula rate = Δ[C]/Δt, where Δ[C] is the change in product concentration during time period Δt. The rate of reaction can be observed by watching the disappearance of a reactant or the appearance of a product over time.

The time can be represented as follows:

t= 2.303\∧ log A0/A

∧= 0.693/t 1/2

The rate of a reaction is proportional to the reciprocal of the time taken. Rate α 1 time Rate is inversely proportional to time. Units: s-1, min-1 etc.

The given parameters are as follows:

t1/2=12.3

A0=5.5

A=0.688

t= 2.303/(0.693/12.3) log (5.5/0.688)

t=36.9

t=37 years

Thus, wine was produced 37 years ago (1984 as usual year 15,2021)

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I guess ensuring that you don't suck the insects or specimen collected by ensuring there is a net in the pooter

C/ If Fe is greater than Fg, the negatively charged oil droplet will move freely toward the negatively charged plate.

In the Millikan oil droplet experiment, the negatively charged oil droplets are subjected to an electric field created by the charged plates. The electric force (Fe) acts on the oil droplet in a direction opposite to the gravitational force (Fg). When Fe is greater than Fg, the electric force overcomes the gravitational force, causing the negatively charged oil droplet to experience an upward force. As a result, the oil droplet moves freely upward toward the negatively charged plate.

Option B is incorrect because if Fe is equal to Fg, the forces balance each other, resulting in a stationary droplet. However, the question states that Fe is increased until it is greater than Fg, implying that the droplet is no longer stationary but moves in response to the electric force.

Therefore, option C is the correct answer, as it describes the effect of an electric field on the motion of a negatively charged oil droplet in the Millikan oil droplet experiment.

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Answer:

A

Explanation:

A compound machine is a combination of two or more simple machines.

Mole is one of the International System of Units' seven foundation units (SI). Therefore, the mole ratio of Fe to CO in the reaction Fe₂O₃+ 3 CO  2 Fe + 3 CO₂ is 2:3.

How does a mole work?

The unit of measurement used by chemists known as a mole is very significant. Similar to how having a dozen eggs says you have twelve eggs, having a mole of something indicates that you have 602,214,076,000,000,000,000,000 of that particular thing.

                         Chemists must measure very small objects, such as atoms, molecules, or other particles, using moles.

Chemical reactions frequently occur at levels that use grams would be inappropriate, but using actual figures of atoms/molecules/ions would also be misleading. As a result, scientists devised the moles to bridge the divide among extremely small and extremely huge numbers.  The mole ratio of Fe to CO in the reaction

     Fe₂O₃+ 3 CO  2 Fe + 3 CO₂ is 2:3.

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The standard enthalpy change for reaction (3) is 117.1 kJ.

The standard enthalpy change for reaction (3) can be calculated by using the enthalpy changes of reactions (1) and (2) and applying Hess's Law.

To do this, we need to manipulate the given equations so that the desired reaction (3) can be obtained.

First, we reverse reaction (1) to get the formation of C2H4(g) from C2H6(g):

C2H4(g)C2H6(g) ΔH° = -52.3 kJ

Next, we multiply reaction (2) by 2 and reverse it to obtain 2 moles of C2H6(g) reacting to form 3 moles of H2(g):

2C2H6(g)2C(s) + 3H2(g) ΔH° = 169.4 kJ

Now, we add the two modified equations together:

C2H4(g)C2H6(g) ΔH° = -52.3 kJ
2C2H6(g)2C(s) + 3H2(g) ΔH° = 169.4 kJ

When adding these equations, the C2H6(g) on the left side cancels out with the C2H6(g) on the right side, leaving us with the desired reaction (3):

C2H4(g) + H2(g)C2H6(g) ΔH° = -52.3 kJ + 169.4 kJ = 117.1 kJ

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The percent yield of reaction is calculated as 83.67%, which implies that 83.67% of expected amount of Baso was actually produced.

The actual yield divided by theoretical yield times 100 is percent yield.

Theoretical yield of Baso will be calculated as :

As, we know, molar mass of Baso = 234.17 g/mol

So, now moles of Baso is (45.8 g Baso) / (234.17 g/mol) = 0.196 mol Baso

Actual yield of Baso will be:

As we know,  molar mass of Baso = 234.17 g/mol

So, now moles of Baso is (38.4 g Baso) / (234.17 g/mol) = 0.164 mol Baso

As we know, Percent yield is (Actual yield/Theoretical yield) x 100

= (0.164  / 0.196 ) x 100

So, the Percent yield is 83.67%

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The identity of the metal in the compound M2S3 is most likely one of the alkaline earth metals, such as calcium (Ca), strontium (Sr), or barium (Ba).

Based on the given information, the compound M2S3 consists of a metal ion (M) and sulfur ions (S). We are also told that the metal ion has 20 electrons. To identify the metal, we can refer to the periodic table.

Since the metal ion has 20 electrons, it belongs to the group 2 elements (alkaline earth metals) because these elements typically lose 2 electrons to achieve a stable electron configuration. Therefore, the identity of the metal in the compound M2S3 is most likely one of the alkaline earth metals, such as calcium (Ca), strontium (Sr), or barium (Ba).

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A solution of the ionic salt Lihco3 would have 11.3 pH.

In chemistry, salt exists as a chemical compound consisting of an ionic group of positively charged cations and negatively charged anions, which results in a combination with no net electric charge. A common example stands table salt, with positively charged sodium ions and negatively charged chloride ions.

The fragment ions in a salt compound can be either inorganic, such as chloride (Cl−), or organic, such as acetate (CH3CO−2). Each ion can be either monatomic, such as fluoride (F−), or polyatomic, such as sulfate (SO2−4).

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The least abundant of the formed elements are leukocytes (white blood cells) and thrombocytes (platelets). Leukocytes are important cells of the immune system.

They play a crucial role in defending the body against infections caused by bacteria, viruses, and other pathogens. Thrombocytes, on the other hand, are small, irregularly shaped cells that circulate in the blood. They play a vital role in the blood clotting process by forming clots in response to injury.Both leukocytes and thrombocytes are less abundant than erythrocytes (red blood cells). Erythrocytes are the most numerous of the formed elements and are responsible for carrying oxygen from the lungs to the tissues of the body. They are also important in the transport of carbon dioxide from the tissues to the lungs. Leukocytes and thrombocytes are produced in the bone marrow. The production of these cells is regulated by a complex system of hormones and growth factors. When the body needs more of these cells, such as in response to an infection or injury, the bone marrow increases production.The levels of leukocytes and thrombocytes in the blood are important diagnostic indicators of various diseases and conditions. Abnormal levels of these cells can indicate an underlying problem and may require further investigation.

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Answer:

jolly ranchers

Explanation: yes

Answer its Ccccccccccccccccccccccccc

Answer:

2

Explanation:

Electron

Answer:

Intramolecular forces are the forces that hold atoms together within a molecule. Intermolecular forces are forces that exist between molecules.The stronger the intermolecular forces between solute molecule and solvent molecule, the greater the solubility of the solute in the solvent.

Intermolecular and intramolecular forces determine the solubility of solutes in water. As the polar solute dissolves in a polar solvent and nonpolar dissolves in nonpolar.

Intermolecular forces can be defined as the attractive forces and repulsive forces that develop between the molecules of a substance. These forces decide most of the chemical properties and physical properties of matter. The intermolecular forces between the molecules are known as Vander Waals forces.

Forces between the molecules themselves are known as intermolecular forces. The particles are held together by intermolecular forces while forces present within one molecule are known as intramolecular forces.

The intermolecular forces can be described as Dipole-Dipole Interactions, Ion-Dipole, Ion-Induced Dipole, Dipole-Induced Dipole Interactions, and Dispersion Forces.

Polar solute shows attractive intermolecular forces for polar solvents while nonpolar solute dissolves in nonpolar solvents. Intermolecular forces help dissolving solutes in water.

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Answer:

C) Potassium, K, and calcium, Ca

Explanation:

Given pair of elements:

Ni and Cu

Potassium and Ca

Nitrogen and oxygen

Solution:

We know that number of protons and number of electrons are always equal and number of electron or number of proton is called atomic number.

Number of protons given elements:

Ni number of protons = 28

Copper number of protons  = 29

Combine number of protons = 57

K number of protons  = 19

Ca number of protons = 20

Combine number of protons = 39

Ni number of protons  = 7

O number of protons  = 8

Combine number of protons = 15

Thus,  option C is correct.

The 2 moles carbon, 5 moles hydrogen, 1 mole nitrogen, and 2 moles oxygen  is the maximum number of moles of glycine that could be made in that flask, with the specified ingredients.

What is mole ?

A mole is the atom's elementary particle, an ion. The mole of the substance is always related to the Avogadro number. The mole is always associated with the weight or mass of the element or substance. The standard unit of a mole is mol. The mole is a significant factor of the reactant and products to form an equation. A mole calculates the atom, ion, and substance weighs.

What is molecule?

The number of atoms that make up a molecule might vary. Pillows, sheets, and mattress toppers are now part of Molecule's growing line of sleep essentials. To give sleepers a cool, supportive surface, the Molecule AirTEC Mattress Topper blends three layers of open-cell memory foam, AirTEC foam, and polyfoam.

Therefore, The 2 moles carbon, 5 moles hydrogen, 1 mole nitrogen, and 2 moles oxygen  is the maximum number of moles of glycine that could be made in that flask, with the specified ingredients.

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When you are seated in a train that is stopped at the station, you can observe an apple tree in the distance. Using two different reference points, it is possible to explain how the train can appear to be moving and not moving.The two different reference points that can be used in explaining this scenario are the train and the apple tree.

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Which of the following is neutral nucleophile?

Nucleophiles are capable of donating electrons. Among the given options H2O is a neutral nucleophile...~

Answer:

H_2O

Explanation:

So It's Lewis acid and nucleophile.

Also it can behave as acid too (H_3O) so neutral.