Can someone help please

Explanation:

the ice release energy which case water molecule to have least kinetic and potential energy change their confiscation for solid

The pressure of the gas in the container when the volume is 132.5 mL is 465.54 torr (rounded to the nearest 0.01) with units of torr.

To solve this question, we can use the ideal gas law equation, PV = nRT, where P is the pressure, V is the volume, n is the number of moles of gas, R is the universal gas constant, and T is the temperature. Since the sample of neon is at a constant temperature and the number of moles of gas is constant, we can use the equation P1V1 = P2V2, where P1 and V1 are the initial pressure and volume, and P2 and V2 are the final pressure and volume.
Using the given values, we can write:
P1V1 = P2V2
(757.2 torr) x (81.4 mL) = P2 x (132.5 mL)
Solving for P2, we get:
P2 = (757.2 torr x 81.4 mL) / 132.5 mL
P2 = 465.54 torr
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The pH of the solution is determined by the amount of acid or base present in the solution. pH is a measure of the acidity or alkalinity of a solution, with a range of values from 0 to 14. The pH of a solution is equal to the negative logarithm of the hydrogen ion concentration (H+) in the solution

The pH of a solution of 0.080 m trimethylamine and 0.13 m trimethylammonium chloride can be calculated using the following equation:

Kb = [CH3)3N][H2O] / [(CH3)3NH+][OH-]

where Kb is the base dissociation constant of trimethylamine, (CH3)3N. Using the relationship that Kw = Ka × Kb, where Ka is the acid dissociation constant of water (1.0 × 10-14 at 25 °C), the OH- ion concentration of the solution can be found to be 1.23 × 10-5 M. Then, since Kw = [H+][OH-], the H+ ion concentration is found to be 8.12 × 10-10 M. Finally, taking the negative logarithm of the H+ ion concentration gives a pH of 9.09. When a solution is introduced to water, it can either react with the water to form acid or base.

The pH of the solution is determined by the amount of acid or base present in the solution. pH is a measure of the acidity or alkalinity of a solution, with a range of values from 0 to 14. The pH of a solution is equal to the negative logarithm of the hydrogen ion concentration (H+) in the solution. The pH of the solution can be calculated using the pH formula, which is: pH = -log [H+], where [H+] is the concentration of hydrogen ions in the solution. The given solution is composed of 0.080 m trimethylamine and 0.13 m trimethylammonium chloride. Trimethylamine is a weak base and trimethylammonium chloride is its corresponding conjugate acid. When a weak base is added to water, it undergoes a reaction with water to produce hydroxide ions and a conjugate acid.

The base dissociation constant of trimethylamine, Kb is used to find the OH- ion concentration of the solution. The relationship between Kb and Ka is given by Kw = Ka × Kb, where Ka is the acid dissociation constant of water (1.0 × 10-14 at 25 °C).The OH- ion concentration of the solution can be found to be 1.23 × 10-5 M. Then, since Kw = [H+][OH-], the H+ ion concentration is found to be 8.12 × 10-10 M. Finally, taking the negative logarithm of the H+ ion concentration gives a pH of 9.09.

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The body is capable of producing all of the amino acids it need, but it must have enough energy to do so. False

The body is capable of producing some of the amino acids it needs, but there are nine essential amino acids that it cannot make and must be obtained from the diet. Histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine are among the necessary amino acids.

The body also requires energy to synthesize non-essential amino acids, and if there is insufficient energy, the body may not be able to produce enough of these amino acids. Therefore, both dietary intake and energy availability are important for optimal amino acid production and overall health.

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The statement "The body is capable of manufacturing all of the amino acids it needs but it must have sufficient energy to be able to do so. " is False.

The body is capable of producing some of the amino acids it needs, but there are nine essential amino acids that it cannot make and must be obtained from the diet. These essential amino acids include histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine.

The body also requires energy to synthesize non-essential amino acids, and if there is insufficient energy, the body may not be able to produce enough of these amino acids. Therefore, both dietary intake and energy availability are important for optimal amino acid production and overall health.

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Answer:

CaBr₂, CaO, FeBr₂, FeO

Explanation:

Per binary compound, there must be 1 cation (Ca²⁺, Fe²⁺) and 1 anion (Br⁻, O²⁻). The compound should have a charge of 0 (neutral). For this to occur, there sometimes needs to be more than one cation/anion present in the compound. Below I have included the math that displays why there are more ions necessary in some compounds.

CaBr₂

-----> Ca = +2 and Br = -1

-----> +2 + (-1) + (-1) = 0

CaO

-----> Ca = +2 and O = -2

-----> +2 + (-2) = 0

FeBr₂

-----> Fe = +2 and Br = -1

-----> +2 + (-1) + (-1) = 0

FeO

-----> Fe = +2 and O = -2

-----> +2 + (-2) = 0

One curie of radiation represents a significant amount of radioactive activity and is equivalent to 37 billion radioactive decays per second or 3.7 x 10^10 becquerels.

One curie (Ci) of radiation is a unit of measurement that describes the activity of radioactive material. It is defined as the amount of radiation emitted by one gram of pure radium-226, which has a half-life of 1,600 years.
To be more precise, one curie of radiation is equal to 37 billion radioactive decays per second. This means that every second, 37 billion atomic nuclei within the radioactive material undergo a process of radioactive decay, releasing energy and emitting particles such as alpha, beta, or gamma rays.
It is important to note that curie is an older unit of measurement that is not widely used today. Instead, the International System of Units (SI) has adopted the becquerel (Bq) as the standard unit of radioactivity. One curie is equivalent to 3.7 x 10^10 becquerels.
Understanding the measurement of radiation is important in fields such as nuclear physics, radiation therapy, and environmental monitoring.

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Answer:

Mark Brainliest

Explanation:

Which compound below will readily react with a solution of bromine resulting from a mixture of 48% hydrobromic acid and 30% hydrogen peroxide? In general, what type of compound is expected to be the final product when two halogen atoms add across the double bond of an alkene? -A "vicinal" dihalide.

The vapor pressure of a solution prepared by mixing 25 grams of methanol and 75 grams of ethanol at 20 degrees Celsius can be calculated using Raoult's law, which states that the vapor pressure of a component in a solution is directly proportional to its mole fraction.

To calculate the vapor pressure of the solution, we need to use Raoult's law, which is expressed as:

\(P_{total}\)= \(P_A\) ×   \(x_A\) +\(P_B\) ×   \(x_B\)

Where \(P_{total}\) is the vapor pressure of the solution, \(P_A\) and \(P_B\) are the vapor pressures of the individual components (methanol and ethanol in this case), and  \(x_A\) and  \(x_B\) are their respective mole fractions.

First, we need to calculate the mole fractions of methanol ( \(x_A\) ) and ethanol ( \(x_B\)) in the solution. To do this, we need to convert the masses of methanol and ethanol into moles using their molar masses. The molar mass of methanol \((CH_3OH)\) is 32.04 g/mol, and the molar mass of ethanol \((C_2H_5OH)\) is 46.07 g/mol.

Moles of methanol = 25 g / 32.04 g/mol

Moles of ethanol = 75 g / 46.07 g/mol

Next, we calculate the mole fractions:

\(x_A\) = Moles of methanol / (Moles of methanol + Moles of ethanol)

\(x_B\) = Moles of ethanol / (Moles of methanol + Moles of ethanol)

Now that we have the mole fractions, we can substitute them into Raoult's law to calculate the vapor pressure of the solution:

\(P_{total}\) = 92 torr × \(x_A\) + 45 torr ×  \(x_B\)

Substituting the calculated values of \(x_A\) and \(x_B\) will give us the vapor pressure of the solution at 20 degrees Celsius.

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Explanation:

a. The melting point is at 20C and the boiling point is at 80C. The melting point is when a solid is going through a phase change to become a liquid, that is the 1st plateau in the graph. The boiling point is when the liquid is going through vaporization to become a gas. That is the second plateau.

b. At 30C, it is a liquid, since our melting point is at 20C.

c. The substance before 20C is a solid, as we add energy, it will melt and become a liquid.

The graph is different for each substance but in this same configuration where a change in the graph is a different phase or a phase change.

Where that first incline = solid

1st plateau= melting or freezing

2nd incline= liquid

2nd plateau= vaporization or condensation

3rd incline= gas

Answer:

the 3rd option. negative feedback loops are initiated during childbirth.

The initial kinetic energy is zero because the girl was at rest. The final kinetic energy is thus, 3100 J. Therefore, the change in kinetic energy is 3100 J

Kinetic energy of an object is generated by virtue of its motion. It is related to the mass and velocity of the object as follows:

Ke = 1/2 mv²

Given that, mass of girl = 50 kg

mass of bicycle = 12 kg.

total mass = 62 kg.

velocity = 10 m/s.

Then initial kinetic energy  = 0 since v = 0.

Then, ΔKe = 1/2 62 kg × (10 m/s)² - 0 = 3100 J

Therefore, the change in kinetic energy of the girl is 3100 J.

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When more NH₃ gas is added to the system at time t₂ while the temperature is held constant, the value of the equilibrium constant will increase, the total pressure in the container will increase, the amount of N₂ will increase, and the amount of H₂ will decrease.

When more NH₃ gas is added to the system at time t₂ while the temperature is held constant, the equilibrium will shift to reduce the concentration of NH₃ and reach a new equilibrium state. According to Le Chatelier's principle, if the concentration of a reactant is increased, the equilibrium will shift to favor the products to balance the system.

Therefore, in this case, the equilibrium constant will shift towards the products, resulting in an increase in the value of the equilibrium constant. This is because the increase in NH₃ concentration will lead to an increase in the concentration of N₂ and H₂ as they are the products of the reaction.

However, the addition of more NH₃ gas to the system will also increase the total pressure in the container. This is because the number of gas molecules has increased, resulting in an increase in the overall pressure of the system. The amount of N₂ will increase due to the shift in equilibrium, while the amount of H₂ will decrease.

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For the given condition, we can conclude that the reaction is an endothermic reaction and to maintain equilibrium the reaction shifts to right side.

Co²⁺(aq) + 4Cl⁻(aq) ⇄ CoCl₄²⁻(aq).

Endothermic reactions are reactions where the reactants absorb heat from its surrounding while the formation of product. These reactions usually reduce the surrounding temperature.

  In the given condition it is said that cobalt (ii) exists in equilibrium with complex ion, is blue and pink in color. At low temperature the pink color dominates and at higher temperature, the blue color dominates.

  As the given reaction is a reversible reaction, it is easier to maintain the equilibrium. The reaction forms more products in order to maintain the equilibrium. Thus, the reaction absorbs heat and shifts towards right side making the blue color predominant at higher temperature.

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Answer:

E)Li

Explanation:

Electronegativity is the tendency of an atom to attract a pair of bonding electrons. In the periodic table, electronegativity increases across the period and decrease down the group.

This means the element at the top of the group would have the highest electronegativity.

The correct option is;

E)Li

The correct order in which they occur in glycolysis is:Glucose → glucose-6-phosphate → fructose-1,6-bisphosphate → 3-phosphoglycerate → pyruvate

Glycolysis is the metabolic pathway by which the glucose molecule is converted to two pyruvate molecules with the production of energy-containing ATP and NADH in cells.

Pyruvate is a 3-carbon molecule formed from glucose in glycolysis. It is also a key molecule in the Krebs cycle, which is the second stage of cellular respiration.

Similarly, 3-phosphoglycerate is a 3-carbon molecule found in the Calvin cycle, the first stage of photosynthesis.

Glucose-6-phosphate, on the other hand, is a 6-carbon molecule, which is an intermediate in glycolysis.

Glucose and fructose-1,6-bisphosphate are also 6-carbon molecules that are involved in the glycolytic pathway.

So, the correct order in which they occur in glycolysis would be:

Glucose → glucose-6-phosphate → fructose-1,6-bisphosphate → 3-phosphoglycerate → pyruvateThe table below shows the name of each compound, its carbon content, and its order in glycolysis:

Compound

Carbon Content

Order in Glycolysis

Glucose-6-phosphate6

6Fructose-1,6-bisphosphate63-phosphoglycerate3

Pyruvate3

Therefore, based on the information given in the table, the correct answer to the given problem is:a. 3-phosphoglycerate - 3 carbonsb. Pyruvate - 3 carbons

c. Glucose-6-phosphate - 6 carbons

d. Glucose - 6 carbonse. Fructose-1,6-bisphosphate - 6 carbons

And the correct order in which they occur in glycolysis is:

Glucose → glucose-6-phosphate → fructose-1,6-bisphosphate → 3-phosphoglycerate → pyruvate

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One way an energetically unfavorable reaction can be driven by an energetically favorable one is through the use of a coupled reaction.

An energetically unfavorable reaction is a chemical reaction that requires an input of energy to occur, meaning that the reaction will not take place spontaneously. An example of an energetically unfavorable reaction is the breaking of a covalent bond, which requires an input of energy to break the bond and thus is not spontaneous.

In a coupled reaction, two reactions, one energetically favorable and one energetically unfavorable, are linked together. The energetically favorable reaction provides the energy required to drive the energetically unfavorable reaction. An example of this would be the reaction of glucose to pyruvate, which is energetically unfavorable. However, if it is coupled with the oxidation of NADH to NAD+, which is energetically favorable, then the reaction can be made energetically favorable.

Another way an energetically unfavorable reaction can be driven by an energetically favorable one is through the use of a catalyst. Catalysts are chemicals that lower the activation energy required for a reaction to occur, allowing it to occur faster and at a lower temperature. Catalysts can also drive energetically unfavorable reactions by providing a lower energy pathway for the reaction to occur. An example of this would be the reaction of hydrogen peroxide to oxygen and water. Hydrogen peroxide is an energetically unfavorable reaction, but when it is catalyzed by the enzyme catalase, it becomes energetically favorable.

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The web's connectivity advantage allows for data and resource sharing that enables communication with a website.

In our daily lives, communication helps us build relationships by allowing us to share experiences and needs and connect with others. It is the essence of life that allows us to share We all need to communicate.

In our daily lives, communication helps us build relationships by allowing us to share experiences and needs and connect with others. It is the essence of life that can be shared. We all need to communicate. Effective communication results in a sense of satisfaction and accomplishment for all involved. Clearly communicating your message leaves no room for misunderstandings or message changes, and reduces the chance of conflicts.

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Answer:

Organic Chemistry.

Inorganic Chemistry.

Physical Chemistry.

Analytical Chemistry.

Stereochemistry.

Biochemistry.

Geochemistry.

Forensic Chemistry.

Explanation:

Question:

7 types of chemistry

Answer:

Inorganic Chemistry, Physical Chemistry, Analytical Chemistry,  Stereochemistry, Biochemistry, Geochemistry, and Forensic Chemistry.

Explanation:

Inorganic chemistry is a branch of chemistry that deals with inorganic compounds. Physical chemistry is the branch of chemistry concerned with the application of the techniques and theories of physics to the study of chemical systems. Analytical chemistry studies and uses instruments and methods to separate, identify, and quantify matter. Stereochemistry is the branch of chemistry concerned with the three-dimensional arrangement of atoms and molecules and the effect of this on chemical reactions. Biochemistry is the branch of science concerned with the chemical and physicochemical processes and substances that occur within living organisms. Geochemistry is the study of the chemical composition of the earth and its rocks and minerals, and Forensic chemistry is the application of chemistry and its subfield, forensic toxicology.

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A 100.0 mL sample of natural water was titrated with 13.57 mL of 0.1123 M Na OH solution to reach a light pink  are the phenolphthalein end point. The number of millimoles of Na OH required for the titration is 1.525011 millimoles. Titration is a technique used in chemistry

to identify the quantity of a substance by adding a reactant until the chemical reaction is completed. In titration, a solution of known concentration (the titrant) reacts with a solution of unknown concentration (the analyte) to determine its concentration. Titration of natural water with Na OH In this case, we are titrating natural water with Na OH to find the concentration of the unknown solution. The balanced chemical reaction for the titration of natural water with Na OH is:H2O + Na OH → Na+ + OH- + H2O

The volume of NaOH required to reach the end-point of the titration is 13.57 mL. The molarity of Na OH used for the titration is 0.1123 M. We can use the following formula to calculate the number of millimoles of Na OH required for the titration Millimoles of Na OH = (Volume of Na OH × Molarity of NaOH) / 1000Substitute the given values in the above equation and solve for the millimoles of Na OH required for the titration. Millimoles of Na OH = (13.57 mL × 0.1123 M) / 1000= 0.001525011 millimoles Therefore, the number of millimoles of NaOH required for the titration is 1.525011 millimoles.

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Answer:

b

Explanation:

Answer:

13 N to the right

Explanation:

Student 2 provided the right response because ions are always produced during dissolution.

We already know that as the number of ions rises, the amount of randomness in the solution rises as well. As the amount of disorder rises, the system's entropy rises as a result.

Dissolution of ammonium nitrate as follows:-

NH4NO3 (aq) -> NH4+ (aq) + NO3" (aq)

Dissolution of sodium hydroxide as follows:-

NaOH(aq) -> Na+ (aq) + OH (aq)

So the correct answer is:-

Because dissolving always results in an increase in micro-states, the entropy increased for the dissolution reactions of sodium hydroxide and ammonium nitrate.

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Answer:

150g

Explanation:

Assuming they are ideal gases at the same temperature and pressure, equal moles of gasses have equal volume. IN this case, if we have 10g of hydrogen gas, that is 5 moles of H2 gas. That means 5 moles og NO2 will occupy the same volume which is 5*(14.0 + 16.0*2) =  230 g

Answer:

15.44 gm

Explanation:

Hope it is helpful....

Answer:

Li2Se

Lithium selenide

Explanation:

In the given options, oxidation occurs in option D: NO2- → NO3-. In this change, the nitrogen atom increases its oxidation state from +3 in NO2- to +5 in NO3-, which indicates an oxidation process.

The chemical processes in which electrons are transferred from one chemical to another. Redox reactions, also known as oxidation-reduction reactions, are the name given to these electron-transfer processes. Energy changes in the form of heat, light, electricity, etc. accompany these reactions. The addition of oxygen or hydrogen to various substances is another step in the oxidation and reduction reactions.

In the given options, oxidation occurs in option D: NO2- → NO3-. In this change, the nitrogen atom increases its oxidation state from +3 in NO2- to +5 in NO3-, which indicates an oxidation process.

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"In which change does oxidation occur?"

The correct answer is option D: NO2- → NO3-.

In this change, the nitrogen atom in the nitrite ion (NO2-) is oxidized to form the nitrate ion (NO3-). Here's a step-by-step explanation:

1. Identify the oxidation states of nitrogen in both ions.
  In NO2-, the nitrogen atom has an oxidation state of +3.
  In NO3-, the nitrogen atom has an oxidation state of +5.

2. Compare the oxidation states.
  The oxidation state of nitrogen increases from +3 in NO2- to +5 in NO3-.

3. Determine if oxidation occurred.
  Since the oxidation state increased, oxidation occurred in this change.

So, the change in which oxidation occurs is NO2- → NO3-.

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In a vacuum, the objects fall at the same rate independent of their respective masses. That means coin and feather both reach the ground at the same time in a vacuum. Larger objects experience more air resistance than smaller objects. Also, the faster an object falls, the more air resistance it encounters.

Note:

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