Select the chemical equation that most likely represents the reaction between the vinegar and the dolomite. Upper M g upper C upper O subscript 3 plus 2 upper H upper C upper H subscript 3 upper C upper O upper O right arrow upper M g plus upper C upper O subscript 3 plus (upper C upper H subscript 3 upper C upper H subscript 3 upper O upper O) subscript 2 Plus upper H subscript 2 upper O. Upper M g upper C upper O subscript 3 plus 2 upper H upper C upper H subscript 3 upper C upper O upper O right arrow upper M g (upper C upper H subscript 3 upper C upper H subscript 3 upper O upper O) subscript 2 Plus upper C upper O subscript 2 plus upper H subscript 2 upper O. Upper M g upper C upper O subscript 3 plus 2 upper H upper C upper H subscript 3 upper C upper O upper O right arrow upper M g (upper C upper H subscript 3 upper C upper H subscript 3 upper O upper O) subscript 2 Plus upper H subscript 2 upper O. Upper M g upper C upper O subscript 3 plus 2 upper H upper C upper H subscript 3 upper C upper O upper O right arrow upper M g (upper C upper H subscript 3 upper C upper H subscript 3 upper O upper O) subscript 2 Plus upper C upper O subscript 2.

Answer:

monkey

Explanation:

cause that's what u r

Answer:

true?

Explanation:

Answer: The molarity of given solution is 17.75 M.

Explanation:

Given: Moles = 3.55 mol

Volume of solution = 0.2 L

Molarity is the number of moles of a solute present in liter of solution.

Hence, molarity of the given solution is calculated as follows.

\(Molarity = \frac{no. of moles}{Volume (in L)}\\= \frac{3.55 mol}{0.2 L}\\= 17.75 M\)

Thus, we can conclude that the molarity of given solution is 17.75 M.

Based on its pH level, human saliva is neither acidic nor basic. Instead, it is considered to be a neutral substance. The pH scale measures the degree of acidity or alkalinity of a substance, with a range of 0 to 14. Acidic substances have pH values less than 7, basic substances have pH values greater than 7, and neutral substances have pH values equal to 7.Therefore, among the given substances, the acid is the detergent, which has a pH of 10.

Detergents are typically alkaline, which means they have a pH value greater than 7, making them basic. Furthermore, sea water, with a pH of 8.25, is also classified as a basic substance. Milk has a pH of 6.5, making it slightly acidic. Human saliva is a liquid that is secreted by the salivary glands in the mouth. It serves as a lubricant for food, making it easier to swallow. Saliva also contains enzymes that help break down food molecules. The pH of human saliva is usually around 7, making it neutral in nature. The pH of saliva, however, can vary depending on a number of factors, such as diet, medication, and the overall health of an individual. In conclusion, the acid is the detergent which has a pH of 10.

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During hyperventilation, the pH of the blood increases (becomes more alkaline), while the carbon dioxide (CO2) level decreases. These changes are consistent with the prediction.

Hyperventilation refers to an increased rate and depth of breathing, leading to the removal of excess carbon dioxide from the body. As a result, the concentration of carbon dioxide in the blood decreases. Carbon dioxide reacts with water to form carbonic acid (H2CO3), which dissociates into bicarbonate ions (HCO3-) and hydrogen ions (H+). By reducing the carbon dioxide level, there is less production of H+ ions, resulting in an increase in blood pH, making it more alkaline.

The observed changes in pH and carbon dioxide levels during hyperventilation are consistent with the predicted response. Increased ventilation causes more carbon dioxide to be expelled from the body, shifting the equilibrium of the carbonic acid-bicarbonate buffer system. As a consequence, the pH of the blood rises, leading to alkalosis. These changes can be confirmed through blood gas analysis or other diagnostic tests.

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Answer:

Covalent bond

Explanation:

(pls give me brainliest) <3

Answer:

Examine the units: If the density is 1 g/mL, how many mL do you need to make 250 g?

X mL * 1 g/mL = 250 g

Solve for X

x mL = 250 g / 1 g/mL = 250 mL

Hope this helps :)

The volume of water = 250 L

\(density = \frac{mass}{volume}\)

Given, density = 1.0 g/L = 0.001 kg/L

           mass = 250 g = 0.25 kg

Putting the values in the equation

\(0.001 = \frac{0.25}{volume}\)

\(volume = \frac{0.25}{0.001}\)

\(volume = 250 L\)

Hence, the volume of the water is 250 L.

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The amount of work done is 450.0 atm L given that a system is compressed from 50.0 L to 5.0 L at a constant pressure of 10.0 atm.

To find the amount of work done when a system is compressed from 50.0 L to 5.0 L at a constant pressure of 10.0 atm, we can use the equation:

Work = Pressure x Change in Volume

The change in volume is calculated by subtracting the initial volume from the final volume:

Change in Volume = Final Volume - Initial Volume
Change in Volume = 5.0 L - 50.0 L
Change in Volume = -45.0 L

Since the change in volume is negative (indicating compression), we can use the absolute value of the change in volume in the calculation.

Plugging in the values into the equation, we have:

Work = 10.0 atm x |-45.0 L|
Work = 10.0 atm x 45.0 L
Work = 450.0 atm L

Therefore, the amount of work done is 450.0 atm L

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The statement that must be incorrect in this scenario is This reaction must have a large positive standard Gibbs' free energy.

So, the correct answer is D.

A large rate constant (k) implies that the forward reaction is proceeding rapidly, and a small equilibrium constant (K) indicates that the reaction is not favored in the reverse direction.

Therefore, option a) is correct as the reaction would reach equilibrium quickly but still be reactant favored.

Option b) is also correct since the products of the reaction are more thermodynamically stable than the reactants.

Option c) is also true because a small activation energy (E) in the forward direction would allow the reaction to proceed quickly.

However, a large positive standard Gibbs' free energy would indicate that the reaction is not favorable and will not occur spontaneously, which is contradictory to the given scenario.

Hence, the answer of the question is D.

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The correct answer is simple molecular structure.

What is a molecule?

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Answer: Water is a polar molecule since it has an unequal sharing of electrons. Water is chemically written as H2O meaning it consists of hydrogen and oxygen atoms. Hydrogen is number one in the Periodic Table whereas oxygen is number 14. As a result, the configuration of oxygen is 2.8.4 while that of hydrogen is 1. When two hydrogen atoms combine with one oxygen atom, two out of the four electrons in oxygen form the strong bond in water. The resulting effect is that there is an unequal sharing of electrons since two electrons remain unused. The hydrogen end becomes partially positive while the oxygen end is partially negative. Furthermore, the oxygen atom has a stronger attractive force hence drawing more atoms to it. Subsequently, there arises a charge imbalance within the molecule. Besides water, hydrogen fluoride is also a polar molecule.

Explanation: I hope this answerd your question have a good day :)

To find the concentration of sulfide ion when hydroxide ion begins to precipitate, we need to determine the point at which the reaction between sodium sulfide and iron(III) nitrate produces a precipitate.

This reaction can be represented by the following balanced equation: Na2S(aq) + Fe(NO3)3(aq) → FeS(s) + 2NaNO3(aq) First, let's write the balanced equation for the reaction between potassium hydroxide and iron(III) nitrate:

3KOH(aq) + Fe(NO3)3(aq) → Fe(OH)3(s) + 3KNO3(aq)

From the balanced equation, we can see that for every 3 moles of potassium hydroxide (KOH), we get 1 mole of Fe(OH)3(s) precipitate.

Therefore, when hydroxide ion begins to precipitate, the concentration of sulfide ion will be equal to the concentration of potassium hydroxide. Given that the concentration of sodium sulfide is 1.27×10^(-2) M and the concentration of potassium hydroxide is 1.35×10^(-2) M, the concentration of sulfide ion [S^2-] at the point of precipitation is also 1.35×10^(-2) M. Therefore, the concentration of sulfide ion when hydroxide ion begins to precipitate is 1.35×10^(-2) M.

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Answer:

Explanation:

f^ck you

Answer:

4- radioactive isotopes

Explanation:

I don't remember exactly but this question was on the regents

Uranium-238  is a non- fissile element. It is a radioactive isotope that can be best used to determine geological formations. Thus, option 4 is correct.

Radioactive isotopes are elements that have an unstable atomic nucleus and can undergo radioactive decay to produce new particles and energy. They have the same atomic number as that of their parent species.

Isobars are a substance that has atomic mass and do not include uranium. Nuclear fusion and fission are the processes of nuclear energy that combine or splits the unstable nucleus to form a new particle.

Therefore, option 4. Uranium-238 is a radioactive isotope.

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Answer:

5.52

Explanation:

2.76 10^-3 M = 2.76mM

2.76mM*2L= 5.52mmol

Answer:

I dont know at all and that is confusing.

Jean Piaget's contributions to the study of child development include the development of the cognitive developmental theory, identification of the four stages of cognitive development, and the impact of his work on developmental psychology and education.

Jean Piaget made significant contributions to the study of child development through his pioneering work on the cognitive development theory. He observed children's behaviors and interactions with their environment to understand how their cognitive abilities develop. Piaget's cognitive developmental theory has had a profound impact on developmental psychology, education, and sociology.

Piaget's contributions include the development of the cognitive developmental theory, which explains how children acquire cognitive abilities. He observed that children are naturally curious and inclined to experiment, and he proposed that cognitive development occurs through distinct stages as children grow and learn.

Piaget identified four main stages of cognitive development: the sensorimotor stage, preoperational stage, concrete operational stage, and formal operational stage. According to his theory, children progress through these stages in a sequential manner, with each stage building upon the achievements of the previous one.

His cognitive developmental theory has provided a solid foundation for the field of developmental psychology, enabling researchers to better understand how children develop cognitively over time. It has also influenced educational practices by informing teachers about the cognitive abilities and limitations of children at different developmental stages.

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Electrons are moved between two substances.

Answer:

number 5 is the answer

Explanation:

The number of hamburgers sold on Wednesday is 275.

Let's assume the number of hamburgers sold is x.

According to the given information, the number of cheeseburgers sold is 70 more than the number of hamburgers. So, the number of cheeseburgers sold can be expressed as x + 70.

The total number of hamburgers and cheeseburgers sold is given as 620, so we can set up the following equation:

x + (x + 70) = 620

Combining like terms, we get:

2x + 70 = 620

Subtracting 70 from both sides of the equation:

2x = 550

Dividing both sides by 2:

x = 275

Therefore, the number of hamburgers sold on Wednesday is 275.

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Answer:

180

Explanation:

proton = 80

electron = 80

neutron = 100

Note:- the atomic number of an element is the number of protons/electrons in the atomic shell

(protons = electrons)

Mass number = number of protons/electrons + number of neutrons

MN= NP+ NN

MN = 80 + 100

MN= 180

I HOPE THIS HELPS

The description of moving electrons revolving around the atomic orbitals of metal atoms is known as the electron sea model of metallic bonding.

The representation of moving electrons revolving around the atomic orbitals of metal atoms is known as the "electron sea" model of metallic bonding. Very few electrons are present in the outermost atomic orbitals during metallic bonding. The electrons can flow freely throughout the network of the metal because the unoccupied orbitals in the atom's highest energy levels overlap. The valence electrons are "delocalized," or move away from their own metal atoms and toward the atomic nuclei of interacting metal ions, creating a "sea of electrons."

Minerals containing transition metals exhibit metallic bonding frequently. Minerals with metallic bonding include gold, silver, and copper. Metallically bound compounds are efficient heat and electricity conductors because valence electrons can travel freely throughout the structure.

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Based on their pOH values, the difference in [OH– ] concentration between point A and point B is 10^6.

The pH is determined by the concentration of Hydrogen ions [H+]. The higher the concentration of H+ ions, the lower the pH of a substance. If the concentration of H+ is greater than OH-, the material is acidic, i.e. the pH value is less than 7

In this case, the formula for this will be:

\(pH= -log[H+]\)

So we have:

\([OH]= 14-1= 10^{-13}\\[OH] = 14-7=10^{-7}\)

Therefore, the difference in [OH– ] concentration between point A and point B is 10^6.

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Answer: 10^6

Explanation: edge2023

Phenolphthalein is a drab, vulnerable acid that is appreciably used as a hallmark in titration experiments to suggest the endpoint of the titration. The endpoint is indicated with the useful resource of the formation of red color on the grounds that this compound dissociates to shape crimson anions at the same time as dissolved in water.

Titration of an antacid consists of a strong acid-susceptible base titration whose pH at the endpoint is plenty much less than seven. therefore, bromophenol blue rather than phenolphthalein is used as a trademark because the pH range of bromophenol blue is a whole lot less than seven. The pH range of phenolphthalein lies above seven.

The use of CO₂ and its impact on the signs, Phenolphthalein is often used as a hallmark in acid-base titrations. Phenolphthalein is often used as an indicator in acid-base titrations. For this utility, it turns colorless in acidic answers and crimson in simple solutions. It belongs to the elegance of dyes referred to as phthalein dyes.

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Answer: False

Explanation: Flase Old John Dalton (1776-1894)

I hope this is helpful I know it is not much but this is a false answer  

You must be careful not to touch the filter paper with your fingers except along the edges to avoid contamination so as to maintain its purity and thereby get accurate experimental results.

Filter paper is a delicate material that is used to separate liquids and solids. When conducting experiments, it is crucial to ensure that the filter paper is not contaminated in any way.

Firstly, touching the filter paper's surface may introduce contaminants from your skin, such as oils, dirt, or other substances, which can interfere with the accuracy of the results. This is particularly crucial in analytical chemistry and laboratory experiments, where obtaining precise and reliable data is essential.

Secondly, touching the filter paper with your fingers can lead to the transfer of moisture, which may alter the paper's properties and affect its performance. This is especially important in procedures that involve weighing or measuring substances on the filter paper, as moisture can change the paper's mass and skew the results.

Thirdly, handling the filter paper only by its edges helps to maintain its structural integrity. Touching the surface could cause tears, folds, or other deformations, which may compromise the filtering process and lead to inaccurate results.

In summary, to ensure the accuracy and reliability of your experiments, it is crucial to handle filter paper carefully and avoid touching its surface except along the edges. Doing so will prevent contamination, preserve the paper's properties, and maintain its structural integrity throughout the filtering process.

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Answer:

When a substance changes states, it requires energy when it goes to a higher energy state and releases energy when it goes to a lower energy state. Gas has a higher energy than liquid and liquid has a higher energy than solid. The three state changes from a lower energy to a higher energy are: solid to liquid: fusion. liquid to gas: vaporization

Answer:

A

Explanation:

kinetic and mass are directly proportional

so if one increases the other does to

The relationship between the kinetic energy of an object and the mass of an object is Kinetic energy gets bigger at the same rate as the mass of an object.

The energy that an object has as a result of motion is known as kinetic energy. It is described as the effort required to move a mass-determined body from rest to the indicated velocity. The body keeps the kinetic energy it acquired throughout its acceleration unless its speed changes.

Potential energy can be moved into motion by a variety of catalysts, including gravity and chemical reactions, to release kinetic energy. As a result, kinetic energy rises and potential energy falls. Mechanical energy is the sum of all kinetic and potential energy.

The capacity to perform work is arguably the most significant characteristic of kinetic energy. Force acting on an object while it is moving is referred to as work. Energy and work are interchangeable because of their tight relationship.

Thus, option A is correct.

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