Which describes an atom that has fewer neutrons than protons and more lecterns than protons?

When the element comes near an atom having seven valence electrons, no reaction will occur.

The name of the element is Neon.

The electron configuration of elements shows how the total number of electrons present in the atoms of the elements are arranged in the orbitals around the nucleus.

In other words, the electron configuration of elements indicates the total number of electrons on its neutral atom, and hence the atomic number of elements.

In this case, the electron configuration is \(1s^2 2s^2 2p^6\). The total number of electrons is 10. Hence, the atomic number of the element is 10. The element with atomic number 10 is Neon (Ne).

Neon represents one of the inert elements on the periodic table. They possess octet electron configuration and as such, are not reactive ordinarily. Thus, if an atom of neon comes near an atom with seven valence electrons, no reaction will occur.

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The Ksp of group 2 hydroxide is 2.2 x 10^-16. This can be calculated using the balanced chemical equation and the concentrations of the hydroxide and hydrogen ions at the endpoint of the titration.

In order to determine the Ksp of the group 2 hydroxide, we need to use the balanced chemical equation for the reaction between the hydroxide and hydrogen ions. The balanced equation is:

M(OH)2 (s) + 2H+ (aq) -> 2M2+ (aq) + 2H2O (l)

We can use the concentration of the hydrogen ions at the endpoint of the titration and the volume of the hydrochloric acid solution added to calculate the number of moles of hydrogen ions added. Then, we can use the volume of the saturated solution of group 2 hydroxide to calculate the initial concentration of the hydroxide ions. From there, we can use the balanced chemical equation and the initial concentration of the hydroxide ions to calculate the Ksp of the group 2 hydroxide. The calculated Ksp for group 2 hydroxide is 2.2 x 10^-16. It's important to note that the assumption is made that the concentration of the group 2 hydroxide is at its maximum saturation point and that the hydroxide concentration remains constant during the titration process.

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Answer:

89.3 %

Explanation:

M(CH4) = 12+ 4*1 = 16 g/mol

M(O2) = 2*16 = 32 g/mol

M(CO2) = 12 + 2*16 = 44 g/mol

8.50 g * 1 mol/16 g = 0.5313 mol CH4

15.9 g * 1 mol/32 g = 0.4969 mol O2

9.77 g * 1 mol/44 g = 0.2220 mol CO2

1)                                  CH4        + 2O2 -----> CO2 + 2H2O

from reaction             1 mol          2 mol

given                       0.5313 mol   (0.4969 mol)

1 mol CH4              --- 2 mol O2

0.5313 mol  CH4  --- x mol O2

x= 2*0.5313 = 1.0626 mol O2

We can see that for given amount of CH4 we do not have enough O2, so O2 is a limiting reactant.

2)                               CH4        + 2O2 -----> CO2 + 2H2O

from reaction                             2 mol        1 mol

given                                      0.4969 mol   x mol

x = 0.4969*1/2 = 0.2485 mol CO2 theoretical yield

3)

Practical yield CO2 = 0.2220 mol

Theoretical yield CO2 = 0.2485 mol

% yield = (0.2220/0.2485)*100% = 89.3 %

Answer:

0.21 M

Explanation:

Molarity is the calculation of the solution in which the number of solute per liter of the solutions. It is the most common measurement unit that is used to measure the concentration of the solution.

The molarity is the unit that is used to measure or calculate the volume of the solvent. The amount of solvent is used in the chemical reaction.

The amount of the two solvent in the same quantity is measured by the formula called c1v1 and c2v2.

Answer:

d) group 18

Explanation:

Group 18 on the periodic table consists of noble gasses, which do not chemically interact with other elements.

The reaction begins with the deprotonation of the carbonyl compound by the hydroxide ion, resulting in the formation of a negatively charged enolate ion.

This enolate ion can act as both a nucleophile and a base. The nucleophilic enolate attacks the carbonyl carbon of another aldehyde or ketone molecule, leading to the formation of a β-hydroxyaldehyde or β-hydroxyketone intermediate. The β-hydroxyaldehyde or β-hydroxyketone intermediate can then undergo dehydration, either spontaneously or with the help of an acid catalyst, to yield an α,β-unsaturated aldehyde or ketone. This compound contains a double bond between the α and β carbon atoms.

Overall, the self-condensation reaction allows aldehydes and ketones to undergo a nucleophilic addition followed by an elimination, resulting in the formation of a more complex molecule. It is important to note that not all aldehydes and ketones undergo self-condensation, as the presence of suitable α-hydrogens is necessary for this reaction to occur.
In summary, the basic conditions facilitate the self-condensation of aldehydes and ketones by promoting the deprotonation of the carbonyl compound, leading to the formation of an enolate ion that can act as both a nucleophile and a base. The reaction proceeds through the formation of a β-hydroxyaldehyde or β-hydroxyketone intermediate, which then undergoes dehydration to yield an α,β-unsaturated aldehyde or ketone.

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Answer:

C) They have different side chains.

Explanation:

Amino acids are the building blocks of proteins and are composed of an amine group (NH2), a carboxyl group (COOH), and a side chain that is unique to each amino acid. While all amino acids have the same basic structure, their side chains or R groups are different and give each amino acid its unique chemical properties. Therefore, the correct answer is that amino acids differ from each other based on their side chains.

Thermal Energy is the total heat found on the inside of a sample of matter.

Heat is the flow of thermal energy from one location to another.

Temperature is the measure of average kinetic energy of the particles in a sample of matter.

The equation Heat gained or lost = Specific Heat x Mass x Change in Temperature is used to calculate the amount of heat gained or lost by a substance when its temperature changes.

Heat gained or lost: This is the energy that is either absorbed or released by a substance as it undergoes a temperature change. The unit of heat is joule (J) in SI units or calorie (cal) in other systems.

Specific Heat: This is a measure of the amount of heat energy required to raise the temperature of a given amount of a substance by one degree Celsius (or Kelvin). The unit of specific heat is J/g °C (or J/g K).

Mass: This refers to the amount of substance being heated or cooled, measured in grams (g).

Change in Temperature: This is the difference between the final and initial temperatures of the substance, measured in Celsius or Kelvin (°C or K).

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Answer:

2.5385 mol

Explanation:

do a quick conversion : 1 grams gold = 0.0050770041918285 mole using ...powered by AnyClip. 1 ... 500 grams gold to mol = 2.5385 mol

Answer:
Acid mine drainage
metal contamination,
increased sediment levels in streams

Explanation:

ACID MINE DRAINAGE
Mine waste, heavy metals and acidic water often end up in streams and rivers.

METAL CONTAMINATION
Heavy metals also affect the biodegradability of organic pollutants, making them less degradable and thus causing double the effect of polluting the environment.

Answer: salt and petroleum

Explanation:

Just took this today and im pretty sure this is the right one

Answer:

Because the Earth's gravity acts on the atmosphere and holds it down, just as it does all other objects. The weight of the atmosphere is estimated to be about 5.75 quadrillion (5,750,000,000,000,000) tons. Air pressure is the "push" of the atmosphere on the Earth's surface.

Solute is the substance that has been dissolved. Solvent is the fluid in which a material dissolves. Solution is a homogenous mixture in which a component has been dissolved in a liquid.

The term "solute" refers to a substance that dissolves in a combination. In a mixture, the solution is made up of different ingredients, some of which are dissolved in the others. The solute dissolves in the solvent to create the solution.

A solution is any combination of one or more solutes that have dissolved in a solvent. Keep in mind that the substance with the highest concentration is the solvent.

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Given data:H2O vapor content: 13 gramsH2O vapor capacity: 52 grams at 25 degrees Celsius 13 grams at 10∘C52 grams at 30∘CFormula used to find the dew point:$$\dfrac{13}{52}=\dfrac{(A*3\pi)/(ln100)}{(17.27-A)}$$$$\frac{1}{4}=\dfrac{(A*3\pi)/(ln100)}{(17.27-A)}$$

Where A is the constantDew Point:It is the temperature at which air becomes saturated with water vapor when the temperature drops to a point where dew, frost or ice forms. To solve this question, substitute the given data into the formula.$$13/52=\dfrac{(A*3\pi)/(ln100)}{(17.27-A)}$$$$13(17.27-A)=3\pi A(ln100)$$By simplifying the above expression, we get$$A^2-17.27A+64.78=0$$Using the quadratic formula, we get$$A=9.9,7.4$$

The dew point is 7.4 since it is less than 10°C.More than 100:The term "More than 100" has not been used in the question provided.

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The net ionic equation for the reaction: Ba²⁺(aq) + CO₃²⁻(aq) → BaCO₃(s)

The net ionic equation for the given molecular equation. First, let's break down the molecular equation into its ionic components:
1. Write the complete ionic equation:
Ba²⁺(aq) + S²⁻(aq) + 2K⁺(aq) + CO₃²⁻(aq) → BaCO₃(s) + 2K⁺(aq) + S²⁻(aq)
2. Identify the spectator ions, which are ions that remain unchanged during the reaction. In this case, the spectator ions are K⁺(aq) and S²⁻(aq).
3. Remove the spectator ions from the complete ionic equation:
Ba²⁺(aq) + CO₃²⁻(aq) → BaCO₃(s)
Now, we have the net ionic equation for the reaction:
Ba²⁺(aq) + CO₃²⁻(aq) → BaCO₃(s)

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Answer:

blue curve on edge :)

Explanation:

Model not supported is:

Thomson's atomic model of the atom from task 1 are not supported by Rutherford's experimental evidence.

Experiments given by Thomson, Rutherford & Dalton:

Dalton and Thomson's concepts are in conflict with the experimental findings of Rutherford. Dalton's model is unsupported by evidence because it does not include electrons, protons, or neutrons.

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The sequence of coal from lowest to highest based on organic carbon contained within is peat, lignite, sub-bituminous, bituminous, anthracite.

This is a fossil fuel which is usually black in color and a combustible sedimentary rock.

There are different types of coal with the amount of organic carbon contained within from lowest to highest being shown above.

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Answer:

\(\boxed {\boxed {\sf About \ 2.127 \ moles \ of \ FeCl_3}}\)

Explanation:

To convert from moles to grams, the molar mass must be used.

1. Find Molar Mass

The compound is iron (III) chloride: FeCl₃

First, find the molar masses of the individual elements in the compound: iron (Fe) and chlorine (Cl).

There are 3 atoms of chlorine, denoted by the subscript after Cl. Multiply the molar mass of chlorine by 3 and add iron's molar mass.

This number tells us the grams of FeCl₃ in 1 mole.

2. Calculate Moles

Use the number as a ratio.

\(\frac{162.19 \ g \ FeCl_3}{1 \ mol \ FeCl_3}\)

Multiply by the given number of grams, 345.0.

\(345.0 \ g \ FeCl_3 *\frac{162.19 \ g \ FeCl_3}{1 \ mol \ FeCl_3}\)

Flip the fraction so the grams of FeCl₃ will cancel.

\(345.0 \ g \ FeCl_3 *\frac{1 \ mol \ FeCl_3}{162.19 \ g \ FeCl_3}\)

\(345.0 *\frac{1 \ mol \ FeCl_3}{162.19 }\)

\(\frac{345.0 \ mol \ FeCl_3}{162.19 }\)

Divide.

\(2.12713484 \ mol \ FeCl_3\)

3. Round

The original measurement of grams, 345.0, has 4 significant figures. We must round our answer to 4 sig figs.

For the answer we calculated, that is the thousandth place.

The 1 in the ten thousandth place tells us to leave the 7 in the thousandth place.

\(\approx 2.127 \ mol \ FeCl_3\)

There are about 2.127 moles of iron (III) chloride in 345.0 grams.

Answer: C

Explanation:

Increasing the temperature increases the rate of dissolving.

A molecule of O2 will not bind in T state due to low affinity

When T state is formed, it has a low affinity for oxygen. The molecule of O2 would bind to one of the hemes of a hemoglobin molecule in the R state rather than the T state. In the absence of oxygen, hemoglobin molecules tend to aggregate, making it easier for oxygen to bind when it becomes available. In the T state, the heme group is slightly distorted, causing the Fe2+ ion to lie slightly off the plane of the heme ring, and the distal histidine blocks the heme's coordination site, creating a smaller pocket that is unsuitable for oxygen binding.

This is because, in the T state, the Fe2+ ion is coordinated to 5 atoms: 4 pyrrole nitrogens and one imidazole nitrogen from a histidine residue. In the R state, however, oxygen binding causes a conformational change that pulls the histidine residue away from the heme iron, opening up a larger pocket that is more suitable for oxygen binding.

Hemoglobin is a protein that is responsible for transporting oxygen throughout the body in vertebrates. It consists of four subunits, each of which has a heme group that binds to oxygen. Hemoglobin has two different states: the relaxed state, known as the R state, and the tense state, known as the T state. In the R state, hemoglobin has a high affinity for oxygen, while in the T state, it has a low affinity for oxygen.The T state is formed when no oxygen is bound to the heme groups of hemoglobin.

When oxygen is present, it binds to the heme group, causing a conformational change in the protein that shifts it from the T state to the R state. In the R state, hemoglobin has a higher affinity for oxygen, making it easier for oxygen to bind to the protein and be transported throughout the body.

The molecule of O2 would not bind to one of the hemes of a hemoglobin molecule in the T state because it has a low affinity for oxygen in this state. Instead, the molecule of O2 would bind to one of the hemes of a hemoglobin molecule in the R state, which has a high affinity for oxygen. The T state is created when no oxygen is bound to the heme groups of hemoglobin, making it more difficult for oxygen to bind to the protein. In the R state, however, oxygen binding causes a conformational change that opens up a larger pocket that is more suitable for oxygen binding.

a molecule of O2 would not bind to one of the hemes of a hemoglobin molecule in the T state, which has no molecules of O2 bound. This is because hemoglobin has a low affinity for oxygen in the T state, making it more difficult for oxygen to bind to the protein.

Instead, the molecule of O2 would bind to one of the hemes of a hemoglobin molecule in the R state, which has a high affinity for oxygen. In the R state, oxygen binding causes a conformational change that opens up a larger pocket that is more suitable for oxygen binding.

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The number of valence electron pairs in the outermost shell, as determined by the valence shell electron repulsion theory (VSEPR), determines the molecular shape.

By analyzing the repulsion between bond electron pairs in the outermost electron shell, a process known as the molecular shape can determine the shape of a molecule. Because most physical and chemical properties are influenced by molecular shape, it is crucial to study molecular shape or geometry.

The foundation of VSEPR is minimizing the strength of the electron-pair repulsion surrounding the central atom under consideration. The foundation of the VSEPR theory is the notion that the geometry (shape) of a molecule is primarily determined by the repulsion between the pairs of electrons surrounding a central atom.

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Answer          k

Explanation:    better luck

Answer

1.50 mol

Explanation

Given:

Initial volume, V₁ = 25.0 L

Mass of CH4 gas in 25.0 L container = 40 g

Final volume, V₂ = 15.0 L

From the Periodic Table; molar mass of CH4 = 16.04 g/mol

What to find:

The new amount in mole.

Step-by-step solution:

According to Avogadro’s law: For a confined gas, the volume (V) and number of moles (n) are directly proportional if the pressure and temperature both remain constant. That is:

n₁ = Mass/Molar mass = (40.0g/16.04 g/mol) = 2.493765586 mol

n₂ is the new amount in mole and can be calculated as follows:

The new amount in moles is 1.50 moles

Answer:

breaking open microscopic cells filled with enzymes that turn into volatile gasses when they escape. This causes a chemical reaction and creates a lachrymatory agent similar to the chemicals in tear gas.

Explanation:

hope this helps... Mark me brainliest plz?

Answer:

an onion is filled with tiny cells filled with enzymes that turn into gasses when you cut them

this causes a chemical reaction which makes your eyes burn

Explanation:

Answer:

B) A person activates a cold pack by hitting it against a surface.

C) A rechargeable battery is plugged in to charge.

D) Heat is used to separate a compound into its elements.

Explanation:

Chemical reactions that absorb energy are called endothermic reactions. Endothermic reactions absorb energy in the form of heat, light, or electricity, which causes the temperature of the system to decrease.

A) Plants use sunlight and atmospheric gases to make food through photosynthesis, which is an endothermic reaction that absorbs energy in the form of light.

B) A person activates a cold pack by hitting it against a surface, which triggers an endothermic reaction that absorbs heat from the surroundings, causing the cold pack to become cold.

C) A rechargeable battery is plugged in to charge, which involves an endothermic reaction that absorbs electrical energy, converting it into chemical energy that is stored in the battery.

D) Heat is used to separate a compound into its elements through heating, which is an endothermic reaction that absorbs heat from the surroundings, causing the temperature of the system to decrease.


ALLEN

The balanced oxidation half equation is given below:

Oxidation reactions are reactions in which the oxidation of the species increases.

Oxidation reactions can involve addition of oxygen or electronegative elements to a substance or the removal of hydrogen or electropositive elements from a substance.

The balanced half-reaction for the oxidation of solid manganese dioxide to permanganate ion in acidic aqueous solution is given below:

MnO₂ + H₂O → MnO₄⁻ + H⁺ + 3 e⁻

In conclusion, the balanced oxidation half equation shows that three electrons were lost by the manganese (iv) ion to form manganese (vii) ion.

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The first location of chemical and mechanical digestion is the stomach. This statement is false.

Digestion is the breaking down of large insoluble food molecules into smaller water-soluble food molecules so that they can be absorbed into the aqueous plasma. In certain organisms, these small substances are absorbed from the small intestine into the bloodstream. Digestion is important for breaking down food into nutrients that the body uses for energy, growth, and cell repair that it needs to survive.

The digestive system has many forms. A basic distinction is made between internal and external digestion. External digestion evolved early in evolutionary history, and most fungi still rely on it. During this process, enzymes are secreted into the organism's environment, where organic substances are decomposed and some of the products diffuse back into the organism. Animals have a tube (alimentary canal) where internal digestion takes place. This is more efficient as more decomposition products can be trapped and the internal chemical environment can be more effectively controlled.

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When comparing a copper cylinder and a wooden cylinder, the method of comparison that gives more useful results is dimensional analysis.

This method involves analyzing the dimensions of the two objects, such as their size, shape, and weight. The dimensions of an object can provide valuable insights into its properties, such as its strength, durability, and heat conductivity. For example, when comparing a copper cylinder and a wooden cylinder, the copper cylinder will likely have a greater density than the wooden cylinder due to its higher mass.

This means that the copper cylinder will be stronger and more durable than the wooden cylinder, making it a better choice for applications that require strength and durability. The dimensions of the two cylinders can also provide insights into their thermal conductivity. Copper is known for its excellent thermal conductivity, making it a good choice for heat sinks and other applications where thermal management is important. In contrast, wood is a poor thermal conductor, making it a poor choice for such applications.

Therefore, by using dimensional analysis, we can compare the properties of the two cylinders and determine which one is best suited for a particular application.

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Answer:

The type of bond that holds bronze together is a metallic bond.

Explanation:

In metallic bonding, the atoms of the metal elements, in this case, copper and tin, share their valence electrons, forming a "sea" of delocalized electrons that are free to move throughout the structure. This results in a strong attraction between the positively charged metal ions and the negatively charged electron cloud, creating a cohesive force that holds the metal atoms together in a solid structure.