which of these functional groups behaves as an acid?

The number of the  protons are contained in the nucleus of an argon atom is 18 protons of argon atom.

The atomic number of the argon is 18 . The atomic number of the element is exactly equals to the number of the protons in that atom. The number of the proton and the number of the electrons is exactly equals to each other for the neutral atom.

The number of the neutron in the nucleus of the argon atom is 22 neutrons. The atomic mass of the argon atom is 40 amu.

Thus there are 18 protons in the nucleus of the argon atom.

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Answer:

Lawrencium (Lr)

Explanation:

The element with the given electron configuration is Lawrencium (Lr), which has an atomic number of 103.

Using Avogadro’s number, 0.33 moles of tin are present.

The number of particles (atoms or molecules) in each mole of a material is known as the Avogadro’s number. It's represented with a symbol \(N_A\).

Avogadro's number of molecules of that substance make up one mole of an atom, according to the mole concept.

1 mole = 6.02 x \(10^2^3\) atoms

Given:

No. of atoms of tin = 2.01 x \(10^2^3\)

Avogadro’s number, \(N_A\)= 6.02 x \(10^2^3\)

To find:

No. of moles, n = ?

Formula:

n = No. of atoms of tin / Avogadro’s number

Calculations:

n = 2.01 x \(10^2^3\) / 6.02 x \(10^2^3\)

n = 2.01 / 6.02

n = 0.33 moles

Result:

The number of moles present in 2.01 x \(10^2^3\) atoms of tin is 0.33 moles

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To calculate the number of equivalents of Mg2+ in a solution, we need to divide the number of moles by 2, as each mole of Mg2+ contains 2 equivalents. In this case, the solution containing 2.50 mol of Mg2+ has 1.25 equivalents of Mg2+.

To answer this question, we need to know the definition of an equivalent. An equivalent is the amount of a substance that can combine with or replace one mole of hydrogen ions in an acid-base reaction. In the case of Mg2+, it can replace two hydrogen ions, so one equivalent of Mg2+ is equal to half a mole of Mg2+.
Given that the solution contains 2.50 mol of Mg2+, we can calculate the number of equivalents by dividing the number of moles by 2. This is because each mole of Mg2+ contains 2 equivalents, as we discussed earlier.
2.50 mol Mg2+ / 2 = 1.25 equivalents of Mg2+
Therefore, the solution that contains 2.50 mol of Mg2+ has 1.25 equivalents of Mg2+.

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Answer:

A Chemical reaction involves changes in energy in the form of absorbtion and release of heat due to the formation and breakdown of chemical bonds. A chemical reaction is categoried as endothermic reaction in which heat energy is take in or absorbed and exothermic reaction in which energy is released.

A model can be created by following below details:

So, the decrease in temperature shows it is an endothermic reaction in which heat energy is absorbed.

Energy change in the reaction has been stored in the products and the reactants. The change in the reactant to product results in a change in energy.

According to the law of conservation of energy, energy can neither be created nor destroyed in a chemical reaction. The chemical reaction has been resulted in the energy change by the endothermic and exothermic reactions.

The project model for energy change can be:

Reactant + Energy = Products.

The ice cube has been placed in a beaker. It has been consisted of the stored potential energy. WIth the application of heat energy there has been the conversion of ice cubes to the water, and the potential energy of the ice cubes has been converted to the kinetic energy of the moving liquid particles.

Reactant = Product + Energy

The model has consisted of matching the light with a matchstick. The chemical energy of the stored matchstick has been converted to light and heat energy.

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Answer:

2.5

Explanation:

1(NH4)2Cr2O7(s) → 1Cr2O3(s) + 1N2(g) + 4H2O(g).

6CO2(g) + 6H2O(i) → 1C6H12O6(s) + 6C2(g).

Energy (the candlewick & wax) & oxygen are the reactants in the burning of a candle (in the air).Carbon dioxide and water vapor are the end results.

When K is bigger than 1, the reaction's products are preferred.The reactants inside the reaction were favored if K is much less than 1.When K is 1, neither the reactants nor the products are preferred.

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The pressure of SO₃ remaining at equilibrium is 40.2 atm.

The balanced equation for the reaction that occurs is:

2 SO₂ (g) + O₂ (g) ⇌ 2 SO₃ (g)

We can use the formula to calculate the pressure of SO₃ remaining at equilibrium by using the equilibrium constant Kp. The equilibrium constant Kp is given as:

Kp = (P SO₃)²/ (P SO₂)² x (P O₂)

The equilibrium constant Kp is 4.65 x 10³ atm³.

The partial pressure of O₂ is 0.10 atm.

P SO₃ is not given. Let's assume that x is the pressure of SO₃ remaining at equilibrium.

P SO₂ is not given. The reaction coefficient for SO  is 2. So, the partial pressure of SO₂ will be 2x.

To find the pressure of SO₃ remaining at equilibrium, we can use the formula

Kp = (P SO₃)²/ (P SO₂)² x (P O₂) 4.65 x 10³ atm³ = (x)²/ (2x)² x (0.10 atm)4.65 x 10³ atm³ = x²/ (4x²) 4.65 x 10³ atm³

(4x²) = x²

x = √[4.65 x 10³ atm³ (4)]

x = 40.2 atm

Therefore, the pressure of SO₃ is 40.2 atm.

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By dividing the amount of half-lives by the time it took for two half-lives to pass (3.04 hours), we can determine the half-life of silver-112. (2). This gives us a silver-112 half-life of 1.52 hours.

The half-life of a radioactive isotope is defined as the amount of time it takes for half of the initial amount of the isotope to decay. To determine the half-life of silver-112, we can use the information given in the problem.

We know that 28.0% of a sample of silver-112 decays in 1.52 hours. Let's assume that we started with a sample of 100 silver-112 atoms. This means that 28.0 of these atoms would decay in 1.52 hours, leaving us with 72.0 atoms remaining.

After another half-life, we would expect half of the remaining atoms to decay. In other words, we would expect 36.0 atoms to decay, leaving us with 36.0 atoms remaining. Since we started with 100 atoms and now have 36.0 remaining, this means that two half-lives have passed.

Therefore, we can calculate the half-life of silver-112 by dividing the time it took for two half-lives to pass (3.04 hours) by the number of half-lives (2). This gives us a half-life of 1.52 hours for silver-112.

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The value of ΔH for the reaction CO(g) + H₂(g) + O₂(g) → CO₂(g) + H₂O(g) is -1272 kJ.

To calculate the enthalpy change (ΔH) for the given reaction, we can use Hess's law, which states that the overall enthalpy change of a reaction is equal to the sum of the enthalpy changes of the individual reactions involved.

Given the enthalpy changes:

1. 2 C(s) + O₂(g) → 2 CO(g)... ∆H = -222 kJ

2. C(s) + O₂(g) → CO₂(g)... ∆H = -394 kJ

3. 2 H₂(g) + O₂(g) → 2 H₂O(g)... ∆H = -484 kJ

We need to manipulate these reactions to obtain the desired reaction:

1. Reverse reaction 2: CO₂(g) → C(s) + O₂(g)... ∆H = +394 kJ

2. Multiply reaction 2 by 2 to balance carbon atoms: 2 CO₂(g) → 2 C(s) + 2 O₂(g)... ∆H = -788 kJ

3. Leave reaction 3 unchanged: 2 H₂(g) + O₂(g) → 2 H₂O(g)... ∆H = -484 kJ

By adding reactions 2 and 3, we obtain the desired reaction:

CO(g) + H₂(g) + O₂(g) → CO₂(g) + H₂O(g)... ∆H = -788 kJ + (-484 kJ) = -1272 kJ

Therefore, the value of ΔH for the given reaction is -1272 kJ.

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Answer:

The isooctane

Explanation:

A pure substance is, according to Wikipedia, "a chemical substance is a form of matter having constant chemical composition and characteristic properties." That's a lot of words, but we just need to focus on some of them: "constant... characteristic properties." The properties of a pure substance always stay the same, no matter what.

The boiling point of a substance is one of its properties. It looks like the petrol boils at different points, between 45 and 95°C. The isooctane, on the other hand, boils consistently at 99°C. So, we can infer that the isooctane is the pure substance.

Hopefully that was helpful! If you need more questions answered, let me know. :)

The two noteworthy peaks of carboxylic acids in 1H NMR spectra typically appear between 10-12 ppm for the carboxyl hydrogen (OH) and 2-2.5 ppm for the alpha hydrogen (CH).

The peak between 10-12 ppm is known as the carboxylic acid peak, which is caused by the exchange of the acidic proton with the solvent, resulting in broadening of the peak. The peak between 2-3 ppm is known as the multiplet peak, which is caused by the adjacent protons to the carboxylic acid group. The multiplet peak can be split into several smaller peaks due to the J-coupling effect between the protons.

The peak between 2-2.5 ppm corresponds to the alpha hydrogen atoms (CH) that are directly bonded to the carbon atom of the carboxyl group. These peaks appear in this region because the carboxyl group's electronegativity slightly deshields the alpha hydrogen atoms, causing a minor downfield shift in the spectrum.

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Answer:

2.5 L

Explanation:

I got the same question, I just don't remember how I got the answer. But it was right.

The new volume of the gas will be equal to 2.5 L at a pressure of 40 atm. Therefore, option (D) is correct.

Boyle’s law states that the pressure exerted by a given mass of gas at a constant temperature is inversely proportional to the volume occupied by it.

The pressure and volume are inversely proportional to each other as long as the temperature is kept constant.

P ∝ 1/V

or

P₁V₁ = P₂V₂                                                      ................(1)

Given, the initial pressure of the gas, P₁ = 10 atm

The final pressure of the gas,  P₂ = 40 atm

The initial volume of the gas, V₁ = 10 L

Substitute the values of volume and pressure in equation (1);

(10 atm) × (10 L) = (40 atm) × V₂

V₂ = 100/4

V₂ = 2.5 L

Therefore, the new volume of the gas will be equal to 2.5 L If we increase the pressure to 40 atm,

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Your question is incomplete but most probably complete question was,

We are studying the properties of a 10 L vessel of an ideal gas at 300 K and 10 atm of pressure inside. We can fix the volume or the pressure of the vessel as we like. If we reduce the volume in the vessel and the new pressure is measured to be 40 atm, what would the new volume be?

(A) 10 L

(B)  5 L

(C) 3.33 L

(D) 2.5 L

The PE Ratio for today is 0.02 (rounded to 2 decimal places).For yesterday: P/E Ratio = Stock price / EPS Since the EPS for yesterday is not given, we cannot determine its P/E ratio for yesterday.

The P/E ratio is calculated by dividing the stock's market value per share by its earnings per share (EPS).

The given data for Gresham Technology:

Current share price= $23.10, Yesterday's share price = $23.60.

Total shares outstanding = 4.8 million Annual.

Earnings = $5134 million ,PE Ratio formula:

PE Ratio = Stock Price / Earnings per share (EPS).

Therefore, the PE Ratio for today:

PE Ratio = Stock price / EPS Stock price = $23.10EPS = Annual earnings / Number of shares ,

EPS = 5134 / 4.8EPS = $1070.83P/E ,

Ratio = $23.10 / $1070.83 = 0.0216 = 0.02 (Rounded to 2 decimal places).

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The chemical energy generated by oxidation reactions cannot be captured by NADH.

The pyruvates produced during glycolysis are then converted into lactic acid via oxidation of NADH.

The molecule exists in two states: oxidized (NAD+) and reduced (NADH), depending on how many electrons and protons it has taken which together will be the equivalent of a hydrogen atom along with an extra electron.

The mitochondrion receives pyruvate, the byproduct of glycolysis, and transforms it into acetyl coenzyme A, also known as acetyl CoA. The transfer of electrons from pyruvate to acetyl CoA also causes the formation of NADH, which is a kind of energy storage.

Therefore, the chemical energy generated by oxidation reactions cannot be captured by NADH.

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The first wave appear after 320 seconds and after the arrival of P wave

We can use the formula TD = d × t / 100 km

TD = d × t / 100 km

= ( 4000 km × 8 s ) / 100 km

= 32000 km /s / 100 km

= 320 seconds

The first s-wave will arrived in 320 seconds after the arrival of the first p-wave

The earliest waves to reach a seismograph are known as P waves, or primary waves. The fastest seismic waves, known as P waves, can pass through solid, liquid, or gas. On the medium they travel through, they leave a trail of compressions and rarefactions

The second waves to arrive during an earthquake are called S waves, or secondary waves. They can only pass through solids and are substantially slower than P waves

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The substance heats up relatively quickly means less energy needed for the rise in temperature. Therefore, the substance is having low specific heat.

Of all liquids, water has the highest specific heat capacity. The amount of heat that one gram of a substance needs either absorb or lose in order to change its temperature by one degree Celsius is known as specific heat. A compound with "low specific heat" will raise its temperature considerably more quickly than a compound with "high specific heat." J/kg C or J/g C are the units for specific heat. While substances with (high or low) particular heats will be more challenging to heat up, substances with (high or low) specific heats will heat up readily.

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Answer:

d. 7

Explanation:

3CO2 => 3 x 2 => 6 atoms

H20 => 1 => 1 atoms

Answer:

If fluorine were to react with an element such as sodium, fluorine will recieve the all of sodium's valence electrons (1). This means both elements will fulfil the octet rule; valence electrons shells are full.

Explanation:

Electrons are transferred because of the difference in electronegativity

Fluorine = 3.98

Sodium = 0.93

3.98 - 0.93 = 3.05

Δ Electronegativity = 3.05

This falls in the range of 2.0 - 4.0 which means the bond is an ionic bond. In an ionic bond, all valence electrons of the metal (sodium, in this case) are transferred to the non-metal (fluorine, in this case).

Fluorine has 7 valence electrons. when it reacts with an element such as sodium the fluorine will accept one electron from sodium and complete its octave after attending 8 electrons in the outermost shell and attend negative charge.

The octave rule is that every element which is electron deficient will have to obtain 8 electron into it valance shell to become stable according to the rule.

flourine is the electron deficient compound and sodium has an extra electron in its outermost shell and most electronegative element of the periodic table and accepts the electron from the sodium to become stable to follow the octave rule.

Therefore, fluorine has 7 valence electrons. when it reacts with an element such as sodium the fluorine will  accept one electron from sodium and complete its octave after attending 8 electrons in the outermost shell and attend negative charge.

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The main difference between NaBH₄ and LiAlH₄ is their reactivity and selectivity.

NaBH₄ (sodium borohydride) and LiAlH₄ (lithium aluminum hydride) are both reducing agents commonly used in organic chemistry for the reduction of carbonyl compounds (aldehydes, ketones, esters, etc.) to alcohols.

NaBH₄ is a milder reducing agent compared to LiAlH₄, which means it is more selective in its reduction reactions and is generally used for the reduction of less reactive carbonyl compounds. On the other hand, LiAlH₄ is a stronger reducing agent and can reduce a wider range of carbonyl compounds, including more reactive compounds like carboxylic acids and nitriles.

Another difference between the two reagents is their cost and availability. NaBH₄ is more commonly used in industry due to its lower cost and ease of handling, while LiAlH₄ is more expensive and can be more difficult to handle due to its air and moisture sensitivity.

In summary, NaBH₄ is a milder and more selective reducing agent, while LiAlH₄ is a stronger and more versatile reducing agent. The choice between the two reagents depends on the specific reaction conditions and the desired selectivity and efficiency of the reduction reaction.

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Answer:

Some of the common impacts of earthquakes include structural damage to buildings, fires, damage to bridges and highways, initiation of slope failures, liquefaction, and tsunami.

The condition characterized by increased body weight due to Na+ and water retention and a low blood K+ concentration is known as hypokalemia.

Hypokalemia refers to a low concentration of potassium (K+) in the blood. It occurs when there is an imbalance in the levels of potassium in the body.

In this condition, the body retains sodium (Na+) and water, leading to increased fluid volume in the body and subsequent weight gain.

The low blood K+ concentration is a result of excessive potassium loss or inadequate potassium intake.

Hypokalemia can have various causes, such as certain medications, excessive sweating, diarrhea, vomiting, kidney disorders, or hormonal imbalances.

Symptoms of hypokalemia may include muscle weakness, fatigue, irregular heartbeat, muscle cramps, and increased fluid retention.

Treatment involves addressing the underlying cause and may include potassium supplementation, dietary changes, or medication adjustments.

It's important to consult a healthcare professional for a proper diagnosis and appropriate treatment if you suspect you may have hypokalemia or any other medical condition.

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When each compound is treated with one equivalent of HBr, the products formed are as follows:

Part a) Bromohexane (the H attaches to the second carbon to form a secondary carbocation which then undergoes SN1 reaction with Br-).

Part b) 2-Bromo-2-methylhexane (the H attaches to the second carbon to form a secondary carbocation which then undergoes SN1 reaction with Br-).

Part c) 1-Bromo-1-methylcyclohexane (the H attaches to the 1-methyl carbon of the cyclohexane ring to form a tertiary carbocation which then undergoes SN1 reaction with Br-). The reaction between alkenes A and B with HBr is an electrophilic addition reaction that yields the same product, halide C.

The mechanism for the reaction is as follows:

Step 1: The pi bond of the alkene acts as a nucleophile and attacks the H+ from the HBr, causing the bond between the H and the Br to break. This step yields a carbocation intermediate.

Step 2: The Br- ion, which is a weak nucleophile, attacks the carbocation intermediate from Step 1, forming a halide

The reaction is: Stepwise mechanism for the reaction is as follows:

Step 1: In the first step, the acidic proton on the CH₃OH is removed by the strong base, CH₃O-, to yield the methoxide ion as shown below:  

                        CH₃OH + CH₃O- → CH₃O-CH₃OH

Step 2: The methoxide ion attacks the carbonyl carbon of the aldehyde to yield a tetrahedral intermediate which quickly dehydrates to form the intermediate oxocarbenium ion as shown below:

                       CH₃O-CH₂OH + CH₃CHO → CH₃O-CH₂OCH=O+ H₂O

Step 3: Water acts as a nucleophile and attacks the electrophilic carbonyl carbon of the oxocarbenium ion to yield the hemiacetal intermediate as shown below:

Step 4: The hemiacetal is converted to the acetal by an attack by another methoxide ion as shown below:

                     CH₃O-CH₂OCH=O + CH₃O- → CH₃O-CH₃OCH(OMe)₂

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Answer:

Bari oxit được tạo nên từ các nguyên tố Bari (Ba) và Oxi (O)

Explanation:

Answer:

On Sept. 15, 2020, NASA, in partnership with Future Engineers, launched the Artemis Moon Pod Essay Contest. The contest, which is open to all (public, private, and home school) students in grades K-12, asks participants to imagine they are leading a one-week expedition to the Moon’s South Pole. In the essay, students will need to describe to NASA what (and who) they would bring to help make their expedition a success.

The Moon Pod Essay Contest is presented in support of NASA’s Artemis program. The student challenge is part of NASA’s efforts to engage the public in its missions to the Moon and Mars. NASA is returning to the Moon for scientific discovery, economic benefits, and inspiration for a new generation. Working with its partners throughout the Artemis program, the agency will fine-tune precision landing technologies and develop new mobility capabilities that allow robots and crew to travel greater distances and explore new regions of the Moon.

Explanation:

Answer:

I would bring some warm clothes to keep me warm through the night because South Pole is cold. I would also bring blankets and sticks to make a fire. I would bring my bestfriend to keep me company.

Explanation:

Answer:

6.02 × 10^23 molecules = 1 mole

5.27 × 10^45 molecules = x

x = 5.27 × 10^45/ 6.02 × 10^23 × 1

= 8.754 × 10^21 mol

I don't know if it's correct but based on the question that was the only way I saw how to work it out

The rate of weathering for the bar of soap is -6.25 grams of soap per hour. This means that the soap is weathering at a rate of 6.25 grams per hour, resulting in a decrease in mass over time.

To calculate the rate of weathering for the bar of soap in grams of soap per hour, we need to know the change in mass of the soap over a given time period.

Let's assume that the initial mass of the bar of soap is "M1" grams, and after a certain period of time, the mass decreases to "M2" grams.

The rate of weathering can be calculated using the following formula:

Rate = (M2 - M1) / t

Where:

Rate is the rate of weathering in grams of soap per hour,

M2 is the final mass of the soap in grams,

M1 is the initial mass of the soap in grams,

t is the time period in hours.

Let's say the initial mass of the soap is 100 grams (M1), and after 4 hours, the mass decreases to 75 grams (M2).

Using the formula:

Rate = (75 g - 100 g) / 4 h

Rate = -25 g / 4 h

Rate = -6.25 g/h

The negative sign indicates that the mass of the soap is decreasing over time, which is expected for weathering.

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The thing that will happen to the underwater plants is option D: Existing plants will grow larger and new plants will grow.

The existing plants in the aquarium were limited in their growth by the availability of light. By increasing the amount of sunlight the aquarium receives, the plants will now have access to more light energy, which is necessary for photosynthesis.

Therefore,  This increased light energy will allow the existing plants to grow larger. Additionally, the increased light will also provide the necessary energy for new plants to grow, resulting in an increase in the overall number of plants in the aquarium.

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