What volume (mL) of concentrated H3PO4 (14. 7 M) should be used to prepare 125 mL of a 3. 00 M H3PO4 solution?

There is no kinetic energy in the ball at first, only gravitational potential energy mgh. Because some energy must always be expended to overcome air resistance and resistance in the support as ball swings.

Motion is a characteristic where a body shifts its location with regard to time. These are the different motions: 2.1 a linear motion Particles moving linearly can be characterized as traveling along a straight or curved path from one location to another.

A change in an object's position with regard to time is what we mean when we say that something is moving. Motion is demonstrated by things moving, such is a book tumbling off a desk, water running from the faucet, rattling windows, etc.

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There are no unpaired electrons present in this atom of oxygen.

The molecular orbital configuration of the oxygen atom given is,

1s²2s²2px²2py².

As we can see, there is not electron in the configuration which is alone in the orbital, they all are present in pairs. So, there are no unpaired electrons present.

This state of the oxygen atom when there are no unpaired electron are present, this could be the ground state of the atom.

The ground state of the atom is when the potential energy of the electrons of the atom is minimum.

In this configuration, no electron is unpaired, all the electrons are paired.

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Half-life of hydrogen-3 if 240,000 H-3 nuclei decay to 15,000 nuclei in 48 days is calculated as to be 12 days.

The amount of time it takes for half of the initial number of nuclei to decay is called as half life.

N = N₀ (1/2)^(t/T)

N₀ is initial number of nuclei

N --> number of nuclei left after time t

T is half-life of the substance

N₀ = 240,000; N = 15,000 ; t = 48 days

15,000 = 240,000 (1/2)^(48/T)

1/16 = (1/2)^(48/T)

(1/16) = ㏒[(1/2)^(48/T)]

So ㏒(1/16) = (48/T) ㏒g(1/2)

T = -48 / ㏒(1/2) * ㏒(1/16)

T = 12 days

Therefore, half-life of hydrogen-3 is 12 days.

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Two half-lives have elapsed since the material was 100% parent atoms.


The ratio of parent to daughter isotopes in a radioactive decay process is related to the number of half-lives that have elapsed since the material was 100% parent atoms. In this case, the ratio of parent to daughter isotopes is 0.40, which means that there are more parent isotopes than daughter isotopes.

Each half-life of a radioactive decay process reduces the amount of parent isotopes by half, while the amount of daughter isotopes increases by half. Therefore, after one half-life, the ratio of parent to daughter isotopes would be 0.50 (equal amounts of parent and daughter isotopes). After two half-lives, the ratio would be 0.25 (more daughter isotopes than parent isotopes).

Since the ratio in this case is 0.40, we know that two half-lives have elapsed since the material was 100% parent atoms.

In summary, the ratio of parent to daughter isotopes in a radioactive decay process is related to the number of half-lives that have elapsed since the material was 100% parent atoms. In this case, the ratio of 0.40 indicates that two half-lives have elapsed.

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Answer:

the second one I think...

Answer:

The answer is the first one.

Acceleration is the change of velocity

Velocity is another term for speed with direction.

Answer:The specific heat of water is 1 calorie/gram °C = 4.186 joule/gram °C.

Explanation:Therefore the required amount of energy is following:

Q = c*m*dT = 4.186 * 120 * (24 - 2) = 11,051 J

Answer:

True mark brainlest

Explanation:

Answer:

The skin

Explanation:

The skin is the largest organ of the body. The skin and its derivatives (hair, nails, sweat and oil glands) make up the integumentary system. One of the main functions of the skin is protection. It protects the body from external factors such as bacteria, chemicals, and temperature.

Answer:

In chemical nomenclature, the IUPAC nomenclature of organic chemistry is a method of organic chemical compounds

Explanation:

IUPAC

Answer:

uip name : propane-1,2,3-triol

Answer:

here

Explanation:

This is the electron configuration of the element carbon.

The pH of the acetic acid solution before any base is added is 0.823.

Given,

The volume of acetic acid = 25 mL

The concentration of acetic acid = 0.150M

The concentration of NaOH = 0.150M

Acetic acid is a weak acid and partially dissociates into its conjugate base, acetate (CH₃COO⁻), and a hydronium ion (H₃O⁺).

The dissociation reaction of acetic acid can be written as follows:

CH₃COOH + H₂O ⇌ CH₃COO⁻ + H₃O⁺

The equilibrium constant expression for this reaction is given by:

Ka = [CH₃COO⁻][H₃O⁺] / [CH₃COOH]

To find the pH, it is required to determine the concentration of hydronium ions (H₃O⁺). Since the concentration of acetic acid and hydronium ions are equal, the concentration of H₃O⁺ is also 0.150 M.

Using the pH formula:

pH = -log[H₃O⁺]

pH = -log(0.150)

pH = 0.823

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During the formation of the ionic compound magnesium sulfide, a magnesium atom donates two electrons to a sulfur atom to make a magnesium ion and a sulfide ion that are then attracted to each other by electrostatic forces.

An ionic bond between two oppositely charged ions that are created as a consequence of the complete transfer of one or more electrons exhibits the electrostatic force of attraction.

An example of an ionic compound is magnesium sulfide formed when a magnesium atom donates two electrons to a sulfur atom to form cations and anions held together by electrostatic forces of attraction.

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Answer:

False

Explanation:

Here is the three observation about copper.

copper (Cu), chemical element, a reddish, extremely ductile metal of the  Group 11 (Ib) of the periodic table that is an unusually by its  good conductor of to the  electricity and heat. Copper of  to the found in the free metallic state in nature. This is  native copper was first by the  used .

The reaction between to the  copper carbonate and it is  sulphuric acid will be a great neutralization reaction. Copper carbonate will acts like as a base, however, sulphuric acid is an acid. This reaction can also be the  viewed as a double line displacement reaction too. By it's understand the nature of this reaction and what will be the final to  product of this reaction.

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Calculate the mass, moles, or solution molarity using stoichiometry. A chemical equation that is balanced conveys a lot of information inside a clear and concise manner.

Atomic charge Mass m of the a chemical divided by the molecular weight of the material. The formula for this is MB ≈ m/nB, where m seems to be the product of the mass of the a sample of a pure substance or nB is the molecular weight of substance B.

Organic compounds called hydrocarbons are made completely from carbon and hydrogen. Hydrocarbons are substances that we frequently use in our daily lives; two examples are the butane in such a lighter and or the propane in such a gas grill.

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In the pair of sodium and potassium the second element has a higher first ionization energy but a lower second ionization energy then the first element.

Ionization energy can be defined as that amount of energy which is required in order to pull out an electron from the vicinity of an atom completely.

When we remove out first electron from the atom it is called the first ionization energy and when we pull out the second electron from the atom it is known as the 2nd ionization energy.

As per the question when we talk about Sodium and potassium, potassium has a higher ionization energy but a lower second ionization energy then sodium because of the size difference between the two atoms.

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In binary search, the list elements are compared based on their order. To find which list elements will be compared to the key 27 using binary search, we need to consider the order in which the elements are checked. Binary search works by repeatedly dividing the list in half, so the elements that are compared are the ones in the middle of each division.

Assuming the list is already sorted in ascending order, the comparison process will be as follows:
1. Start with the whole list.
2. Compare the middle element with the key 27.
3. If the middle element is equal to the key, we're done.
4. If the middle element is greater than the key, repeat the process with the left half of the list.
5. If the middle element is less than the key, repeat the process with the right half of the list.
6. Repeat steps 2-5 until the key is found or the list is exhausted.
Based on this process, the elements that will be compared to the key 27 using binary search will be the middle elements at each division until the key is found or the list is exhausted.

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Iron toxicity symptoms are generally associated with excessive intake or accumulation of iron in the body, which can lead to various health issues. These symptoms include.,

1. Fatigue and weakness: Excessive iron can cause damage to the mitochondria, which are responsible for producing energy in cells. This damage can result in reduced energy production, leading to fatigue and weakness.
2. Joint pain: Iron overload can cause inflammation in the joints, leading to pain and discomfort.
3. Abdominal pain: Excessive iron intake can lead to irritation of the gastrointestinal lining, causing abdominal pain.
4. Liver damage: High iron levels can lead to liver damage, including cirrhosis and liver failure.
5. Heart problems: Excess iron in the body can contribute to heart issues, such as arrhythmias, congestive heart failure, and even heart attacks.
6. Diabetes: High iron levels can affect insulin production and sensitivity, leading to an increased risk of developing type 2 diabetes.
7. Skin discoloration: Iron overload can cause an accumulation of iron in the skin, resulting in a bronze or gray discoloration.
Remember to monitor your iron intake and consult with a healthcare professional if you experience any of these symptoms.

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Answer:

the Answer is .A

Explanation:

do you need explanation

Answer:

Martin Luther King, Jr. worked hard to bring greater equality to America and ensure civil rights for all people, regardless of race.

The correct order of increasing pH value for 1.0 mol dm-3 solutions of the four substances is NH3 < CH3COOH < HCl < KOH.

This is because NH3 is a weak base and will have a pH value slightly above 7, CH3COOH is a weak acid and will have a pH value slightly below 7, HCl is a strong acid and will have a pH value close to 0, and KOH is a strong base and will have a pH value close to 14. Therefore, NH3 has the highest pH value, followed by CH3COOH, HCl, and then KOH. It is important to note that pH values are logarithmic and each increment represents a tenfold difference in acidity or basicity. So, the difference in pH between NH3 and CH3COOH may seem small, but in reality, NH3 is ten times more basic than CH3COOH.

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Among the three companies, Company A has the highest acid-test ratio (2.67), followed by Company B (2.00), and then Company C (1.75). The higher the acid-test ratio, the better the company's ability to meet short-term obligations without relying on inventory sales. Therefore, Company A is in the best position to meet short-term obligations.

To compute the acid-test ratio (also known as the quick ratio) for each company, we'll use the formula:

Acid-Test Ratio = (Current Assets - Inventory) / Current Liabilities

a. Compute the acid-test ratio for each company:

Company A:

Current Assets = $250,000

Inventory = $50,000

Current Liabilities = $75,000

Acid-Test Ratio for Company A = ($250,000 - $50,000) / $75,000

Acid-Test Ratio for Company A = $200,000 / $75,000

Acid-Test Ratio for Company A ≈ 2.67

Company B:

Current Assets = $150,000

Inventory = $30,000

Current Liabilities = $60,000

Acid-Test Ratio for Company B = ($150,000 - $30,000) / $60,000

Acid-Test Ratio for Company B = $120,000 / $60,000

Acid-Test Ratio for Company B = 2.00

Company C:

Current Assets = $300,000

Inventory = $90,000

Current Liabilities = $120,000

Acid-Test Ratio for Company C = ($300,000 - $90,000) / $120,000

Acid-Test Ratio for Company C = $210,000 / $120,000

Acid-Test Ratio for Company C = 1.75

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The % v/v of alcohol in the solution is 30%.

To determine the volume/volume percent (% v/v) of alcohol in the solution, we need to calculate the ratio of the volume of alcohol to the total volume of the solution and then express it as a percentage.

Given:

Volume of alcohol = 15.0 mL

Total volume of the solution = 50.0 mL

% v/v of alcohol = (Volume of alcohol / Total volume of the solution) * 100

Substituting the given values into the formula:

% v/v of alcohol = (15.0 mL / 50.0 mL) * 100

Simplifying the expression:

% v/v of alcohol = 0.3 * 100

% v/v of alcohol = 30%

Therefore, the % v/v of alcohol in the solution is 30%.

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solids are similar to liquids in that both are condensed states, with particles that are far closer together than those of a gas. However, while liquids are fluid, solids are not. The particles of most solids are packed tightly together in an orderly arrangement. The motion of individual atoms, ions, or molecules in a solid is restricted to vibrational motion about a fixed point. Solids are almost completely incompressible and are the densest of the three states of matter.

what are the questions?

Answer:

1.41g

Explanation:

all work is shown in the attached image :-)

To solve this problem, we can use the gas law equation, which states that PV = nRT, where P is pressure, V is volume, n is the number of moles of gas, R is the universal gas constant, and T is temperature.

Since we are told that the temperature remains constant, we can simplify the equation to P1V1 = P2V2, where P1 is the initial pressure, V1 is the initial volume, P2 is the new pressure, and V2 is the new volume.
Plugging in the given values, we get:
P1 = 862 kPa
V1 = 752 c * m^3
V2 = 624 c * m^3
Solving for P2, we get:
P2 = (P1 * V1) / V2
P2 = (862 kPa * 752 c * m^3) / 624 c * m^3
P2 = 1040 kPa
Therefore, the new pressure under a volume of 624c * m^3 is 1040 kPa.

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