Some pale yellow crystals of ammonium nitrite (NH4NO2) were placed in an empty, sealed flask at Time 0. The ammonium nitrite crystals began to decompose according to the chemical equation shown below.

NH4NO2(s) + heat ⇌ N2(g) + 2 H2O(g)

At Time T1, the temperature of the system was decreased, and equilibrium was then allowed to re-establish. The new equilibrium was established at Time E2.

1. How would the value of the equilibrium constant (K) at E2 compare to the value at E1? Explain your answer. Justify your answer using Le Chatelier’s Principle.

2. Explain, in terms of collision theory, the effect of the temperature decrease on the rate of both the forward and reverse reactions, from T1 to E2.

The electrophile that reacts with benzene in the nitration of benzene by a mixture of nitric and sulfuric acid is the nitronium ion (NO2+). Electrophiles are atoms or molecules that are electron deficient or have an unfilled valence shell, making them attractive to electrons.

Electrophiles will attack nucleophiles, which have a free pair of electrons in their outermost orbital, resulting in a chemical reaction. Nitration of benzene is the reaction of benzene with a mixture of nitric acid and sulfuric acid to produce nitrobenzene as the major product. The reaction involves the substitution of a hydrogen atom on the benzene ring by a nitro group (-NO2).The electrophile that is formed by the mixture of nitric acid and sulfuric acid is the nitronium ion (NO2+).

The nitronium ion is highly reactive and will attack the benzene ring, leading to the formation of nitrobenzene. The reaction is as follows:

Benzene + Nitric Acid + Sulfuric Acid → Nitrobenzene + Water.

The mechanism of the reaction involves the formation of an intermediate arenium ion, which is stabilized by resonance. The intermediate is attacked by the nitronium ion, leading to the formation of the final product.The nitration of benzene is an important reaction in organic chemistry, as it is used to synthesize a wide range of organic compounds such as explosives, dyes, and pharmaceuticals.

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The pH of the solution containing 44.5 mol HCl and 38.9 mol NaOH is 2.087.

pH is generally the measure of how acidic or basic a substance or solution is on a scale of 1 to 14. Basically, on the pH scale, a pH value of 7 is neutral, which means the solution is neither acidic nor basic and a pH value of less than 7 means the solution is more acidic, and a pH value of more than 7 means the solution is more basic.

Moles of H⁺ = 44.5

Moles of OH⁻ = 38.9

Now,

H⁺ + OH⁻ → H₂O

Moles of H⁺ left = 44.5 - 38.9 = 5.6

Volume = 684 L

[H⁺] = n/V = 5.6 / 684 = 0.0082 M

pH = - log [H⁺] = - log 0.0082 = 2.087

Hence, the pH of the solution containing 44.5 mol HCl and 38.9 mol NaOH is 2.087.

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To indicate the distance that corresponds to the bond length of the N₂ molecule, we need to know the bond length of the N₂  molecule. The bond length of a molecule refers to the distance between the nuclei of two bonded atoms.

The bond length of N₂  is approximately 109.76 picometers (pm). Therefore, to indicate the bond length of N₂   on the horizontal axis, we can place an X at 109.76 pm.

It's important to note that bond lengths can vary slightly depending on the specific conditions of a given experiment or calculation. However, the bond length of N₂  at standard conditions is well established, and 109.76 pm is a commonly accepted value.

Knowing the bond length of a molecule is important in understanding the nature of the chemical bond between two atoms. The bond length is related to the strength of the bond, with shorter bond lengths indicating stronger bonds. The bond length of N₂ , for example, is relatively short, indicating a strong bond between the two nitrogen atoms.

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803 mmHg is equal to 106.44 kPa. This can be calculated using the equation P (kPa) = P (mmHg) × 0.133322.

The pressure of 803 mmHg is equal to 106.44 kPa. This can be calculated by using the following equation: P (kPa) = P (mmHg) × 0.133322. Therefore, 803 mmHg is equal to 106.44 kPa. To understand this relationship better, pressure can be thought of as a measure of how much force is applied to a certain area. The unit of measure for pressure is the Pascal (Pa), and one kPa is equal to 1000 Pa. The unit of measure for pressure in mmHg is the millimeter of mercury (mmHg). One mmHg is equal to 133.322 Pa. Therefore, one kPa is equal to 7.5 mmHg. To convert from mmHg to kPa, the equation is

P (kPa) = P (mmHg) × 0.133322. Using this equation, the pressure of 803 mmHg can be converted to 106.44 kPa.  

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Chlorophyll absorbs blue, red, and orange light most strongly, so the color of light that is not strongly absorbed by chlorophyll is green.

Chlorophyll is a pigment found in plant cells and is accountable for the plant's green color. It also assists in the absorption of light energy from the sun, which is essential for photosynthesis to occur. The two types of chlorophyll, chlorophyll a and chlorophyll b, differ slightly in their molecular structure, but they both absorb light best in the blue and red areas of the spectrum. While chlorophyll absorbs light in most areas of the visible spectrum, it is least effective at absorbing green light, which is reflected and provides plants with their green appearance.

Photosynthesis is a process in which green plants produce organic compounds like carbohydrates and oxygen from carbon dioxide and water using sunlight as an energy source. The process of photosynthesis takes place in organelles called chloroplasts, which are found in the green parts of plants, including leaves and stems. Photosynthesis takes place in two stages: the light-dependent reaction and the light-independent reaction. Light is absorbed by pigments like chlorophyll in the first stage, which is followed by the production of ATP and NADPH. These products are subsequently utilized to convert carbon dioxide and water into glucose in the second stage of photosynthesis. The glucose generated may be utilized for energy or stored as starch.

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Entrepreneurs revitalise communities by creating jobs that raise the standardization of living and enhance lifestyles by relocating their new companies to Florida.

The east coast of Florida was developed by Henry Morrison Flagler, who is best known for this. Between Daytona and Key West, he was in charge of constructing the Florida Eastern Seaboard Railway. Through tourism and agriculture, Flagler made a big contribution to Florida's economy.

Florida is growing in popularity among business owners and entrepreneurs for a variety of reasons. The state has a cutting-edge public policy that supports the creation of new products. In addition, it offers a sizable, multilingual workforce, cheap taxes, and a supportive business environment.

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When acid and/or base is added to a non-buffered solution, the pH of the solution will undergo drastic changes. On the other hand, the pH of a buffered solution will remain relatively constant upon the addition of an acid or a base.

A buffer solution is one that can resist changes in pH upon the addition of an acid or base. A buffer solution is made up of a weak acid and its corresponding base or a weak base and its corresponding acid.

1. When acid is added to a buffered solution, the weak acid in the buffer reacts with the added H+ ions to form more of the conjugate base of the weak acid. This reaction consumes the added H+ ions and helps to maintain the pH of the solution.

2. When a base is added to a buffered solution, the weak base in the buffer reacts with the added OH- ions to form more of the conjugate acid of the weak base. This reaction consumes the added OH- ions and helps to maintain the pH of the solution.

3. When acid is added to a non-buffered solution, the concentration of H+ ions in the solution increases, leading to a significant decrease in the pH of the solution. When a base is added to a non-buffered solution, the concentration of OH- ions in the solution increases, leading to a significant increase in the pH of the solution.

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The percent mass of the red dye is 2.92% when  7.3 g of red dye is dissolved in water to form 250 g solution.

Percent composition is defined as a convenient way to record concentration of solution.It is useful in making solutions of different concentrations.It is a expression which relates element to compound as,mass of element/mass of compound ×100.There are 2 types :percent  mass and percent by volume .Substitution of values in formula gives, 7.3/250×100= 2.92 %.

Thus, percent mass of the red dye is 2.92% when  7.3 g of red dye is dissolved in water to form 250 g solution.

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When the reagent is put to 6M HCl, Cu(OH)2(s) will not dissolve it.

A material or molecule that is introduced to a system in order to bring about a chemical reaction or is added to assess whether a reaction has happened or not is referred to as a reagent in the study of chemistry. A similar response is performed to verify the presence of a different chemical.

A Reagent is described as a "substance or compound that is introduced to a system in order to bring about a chemical reaction or is added to test if a reaction happens". The existence of another drug is confirmed by a similar response.

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The overall change in entropy for the process is approximately -0.251 J/K.

The change in entropy can be calculated using the formula:

ΔS = nCp ln(T2/T1) + nR ln(V2/V1)

where:

n = 0.13 moles (number of moles of helium in the balloon)

Cp = 5/2R (specific heat capacity of helium gas at constant pressure)

R = 8.314 J/(mol*K) (gas constant)

T1 = 298 K (initial temperature of the helium gas)

T2 = 291 K (final temperature of the helium gas)

V1 = 3.0 L (initial volume of the balloon)

V2 = 3.5 L (final volume of the balloon)

Plugging in the values, we get:

ΔS = (0.13 mol * 5/2 * 8.314 J/(molK)) ln(291 K/298 K) + (0.13 mol * 8.314 J/(molK)) ln(3.5 L/3.0 L)

ΔS = -0.296 J/K + 0.045 J/K

ΔS = -0.251 J/K

Therefore, the overall change in entropy for the process is approximately -0.251 J/K.

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In the former area, we have seen that the eventual outcome of certain qualities is an RNA molecule itself, like those present in the snRNPs and in ribosomes.

In the former area, we have seen that the eventual outcome of certain qualities is an RNA molecule itself, like those present in the snRNPs and in ribosomes. Nonetheless, most qualities in a cell produce mRNA molecules that act as go-betweens on the pathway to proteins. In this part, we look at how the cell changes over the data conveyed in an mRNA molecule into a protein molecule. This accomplishment of interpretation previously pulled into the consideration of scientists in the last part of the 1950s, when it was acted like the "coding issue": how is the data in direct succession of nucleotides in RNA converted into the straight grouping of a synthetically very unique arrangement of subunits — the amino acids in proteins? This interesting inquiry invigorated extraordinary energy among researchers at that point.

There was a cryptogram set up commonly that, after multiple billion years of development, could, at last, be tackled by one of the results of advancement — individuals. What's more, without a doubt, not just has the code been broken bit by bit, but in the year 2000 the intricate hardware by which cells read this code — the ribosome — was at last uncovered in nuclear detail.

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Electricity can be charged via a variety of techniques, such as frictional charging, contact charging, and induction charging.

For conducting electricity, metals like copper, iron, gold, aluminium, and silver work best. Via the electrodes in a standardised aqueous solution at a specific temperature, the electrical conductivity of a substance is measured.

A substance is a metal if it conducts electricity and has a basic oxide. A non-metal is an element whose oxide is acidic but not electrically conducting.

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Answer: Below is the answer

Explanation:

CaCO3 (s) = CaO (s) + CO2(g)

a) The CO2 will be removed. The CaCO3 mass will increase.

b) If the volume is decreased the pressure is increased in CO2.  The CaCO3 mass will decrease.

c) The Pressure will increase.

your messageConvert to number of atoms 294 grams AuTo convert 294 grams of Au to the number of atoms, we need to use the Avogadro's number, which is 6.022 x 10^23 atoms/mole. First, we need to find the number of moles of Au in 294 grams: 294 grams Au / 196.97 g/mole = 1.49 moles Au Next, we can calculate the number of atoms: 1.49 moles Au x 6.022 x 10^23 atoms/mole = 8.97 x 10^23 atoms Au Therefore, there are approximately 8.97 x 10^23 atoms of gold in 294 grams.

a normal result for the glucose screening test is a blood sugar that is equal to or much less than 140 mg/dL (7.8 mmol/L) 1 hour after drinking the glucose solution.

you'll drink a liquid that includes glucose, and then 1 hour later your blood will be drawn to test your blood sugar degree. A ordinary end result is a hundred and forty mg/dL or lower. if your stage is better than 140 mg/dL, you will need to take a glucose screening check.don't devour excessive-sugar meals or easy carbs (such as delicate grains) the morning of your glucose screening. The body breaks those meals down quick, main to a spike in blood sugar levels. meaning avoiding breakfast favorites like: Orange juice and different fruit juices

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The given reaction is calcium, solid, plus 2 h c, l gives c a c l, 2 plus hydrogen. Here we can write 1 mole of calcium, reacting with 2 moles of h, c l ...

Given the following reaction Ca(s) + 2HCl(aq) → CaCl2(aq) + H2(g) If 1.00 g of Ca reacts with 1.00 g HCI and 1.21 g CaCl2 are produced,

The amount of acyclovir  milliliters to be administered per dosage is 100 ml.

To calculate the number of milliliters to be administered per dosage, you will have to follow the following steps:

1. Convert micrograms (mcg) to milligrams (mg). To do this, divide the micrograms by 1000. Therefore, 1000 mcg = 1 mg.

2. The concentration after reconstitution is given as 0.5 mg/ml.

3. Dilute 1 mg in 50 mL of normal saline. This can also be expressed as 0.02 mg/mL (1 mg/50 mL).

4. Use a ratio of the concentration after reconstitution to the diluted concentration to calculate the final concentration of the medication. It is done by multiplying the concentration after reconstitution by the dilution factor.

Therefore, 0.5 mg/mL * 0.02 = 0.01 mg/mL.5. The prescribed dose is 1,000 mcg or 1 mg.6. Divide the dose by the concentration to find the number of milliliters to be administered per dose. 1 mg / 0.01 mg/mL = 100 mL. Therefore, you will administer 100 mL per dose. Therefore, the amount of milliliters to be administered per dosage is 100 ml.

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Moles of gold present in a ring that contains 3.4x10¹⁹ gold atoms is  5.64x10⁻⁵. The correct option is (d).

The thin coating of gold metal on a ring contains 3.4x10¹⁹ gold atoms. We need to find how many moles of gold is this.

Gold (Au) is a chemical element with the symbol Au (from Latin: aurum) and atomic number 79. It is a soft, dense, yellow metal with a bright, metallic luster. Gold has an atomic mass of 196.967 g/mol. Hence one mole of gold atoms will have a mass of 196.967 grams.

The number of moles of gold can be calculated as follows.

Calculate the number of grams of gold present in the ring coating.

Avogadro's number (N) is a physical constant defined as the number of atoms or molecules in one mole of a substance. Its value is 6.02214076 × 10²³ mol⁻¹.

There are 3.4x10¹⁹ gold atoms present in the ring coating.

Moles of gold atoms = Number of gold atoms / Avogadro's number

The number of gold atoms = 3.4x10¹⁹ atoms; Avogadro's number (N) = 6.02214076 × 10²³ mol⁻¹

∴Moles of gold atoms = 3.4x10¹⁹ / 6.02214076 × 10²³ = 5.64x10⁻⁵

Hence the number of moles of gold is 5.64x10⁻⁵.

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The mathematical expression that can be used to determine the value of s, the molar solubility of PBI2(s), given that a saturated solution is prepared by dissolving PBI2(s) in distilled water until no more solid dissolves is given by the equation below.

The mathematical expression that can be used to determine the value of s, the molar solubility of PBI2(s) is given by the following equation:

s = (x mol/L)

where;

x= molar solubility of PBI2(s) in mol/L

The concentration of the PBI2(s) in a saturated solution can be represented as x. The concentration is expressed in terms of the amount of substance (mol) per unit volume (L). Therefore, the mathematical expression that can be used to determine the value of s, the molar solubility of PBI2(s) is s = (x mol/L) which can be used to calculate the molar solubility of PBI2(s). Therefore, the answer is:

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The unknown acid is a weak: diprotic acid. The first pKa of the unknown acid is: 3.0, and the second pKa is: 5.0.

A substance that releases hydrogen ions in water is known as an acid. It has a pH of less than 7, which is the acidic range. Acids are the opposite of bases in chemistry, which release hydroxide ions when dissolved in water.The unknown acid is a weak diprotic acid.

pKa is the negative logarithm of the acid dissociation constant (Ka). It is a measure of the acidity of a molecule, with lower values indicating stronger acids. A pKa value of 3.0 corresponds to a weak acid.

A diprotic acid is a substance that has two hydrogen ions to donate when dissolved in water. The chemical formula for a diprotic acid is often written in the following way: H2A, with the acid donating two hydrogen ions to the water. A weak diprotic acid is an acid that does not fully dissociate in water.

The first pKa of the unknown acid is 3.0.

The second pKa of the unknown acid is 5.0.

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the solubility of kcl at 60 °c in 100g of h2o is about 45 g/100 g H2O


with a view to be capable of understand what's occurring while the solution is cooled from  60∘C  to  0∘C , you want to look at the solubility graph for potassium chloride,  KCl .
notice that the solubility curve shows that at  60∘C , potassium chloride has a solubility of about  45 g/100 g H2O .
What which means is that at that temperature, you may best dissolve  45 g of potassium chloride in step with  100 g  of water. This genuine amount of potassium chloride will result in a saturated solution.
A saturated solution is an answer in that you have an equilibrium between the strong solute and debris of solute which can be being dissolved into answer

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The moles of the magnesium ions and the chlorate ions are produced by the dissolving 1.5 mol of the magnesium chlorate is the magnesium ion is 1.5 mol and the moles of the chlorate ions is 3 mol.

The chemical equation is as :

Mg(ClO₃ )₂ (s)      ⇄    Mg⁺²      +      2ClO₃⁻

The moles of the magnesium chlorate, Mg(ClO₃ )₂ = 1.5 mol

The 1 mole of the magnesium chlorate produces the 1 mole

of the magnesium ion.

The moles of the magnesium ion = 1.5 mol

1 mole of the magnesium chlorate produces the 2 mole

of the chlorate ions.

The moles of the chlorate ions = 2 × 1.5 mol

The moles of the chlorate ions = 3 mol

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To determine the total mass of 1-pentanol that will dissolve in 110 grams of water to produce a saturated solution, we need to use the concept of solubility and molar mass. What is solubility? Solubility refers to the ability of a solute to dissolve in a solvent. It is measured in units of grams per 100 grams of solvent at a specific temperature.

A solution is said to be saturated if it contains the maximum amount of solute that can dissolve in the solvent at a specific temperature. The solubility of a solute depends on factors such as temperature, pressure, and the nature of the solvent and solute. What is molar mass? Molar mass refers to the mass of one mole of a substance. It is measured in units of grams per mole. The molar mass of a compound can be calculated by adding the atomic masses of the elements in the compound. Explanation: Given data: Mass of water = 110 grams To determine: Total mass of 1-pentanol that will dissolve in 110 grams of water to produce a saturated solution Solution: Firstly, let's find out the solubility of 1-pentanol in water. According to the solubility chart, the solubility of 1-pentanol in water at 25°C is 22.5 g/100 ml (or 22.5 g/110 g).So, we can say that 22.5 g of 1-pentanol can dissolve in 100 g of water to produce a saturated solution at 25°C.Now, we can use the proportionality method to calculate the total mass of 1-pentanol that will dissolve in 110 g of water.22.5 g of 1-pentanol dissolves in 100 g of water. So, x grams of 1-pentanol will dissolve in 110 g of water. x = (22.5 × 110) / 100x = 24.75 g Therefore, the total mass of 1-pentanol that will dissolve in 110 g of water to produce a saturated solution is 24.75 grams.

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Answer:

70,219.4 Joules

Explanation:

To calculate the amount of energy required to heat a substance, we can use the following formula:

Q = m * C * ΔT

Where Q is the amount of heat energy required (in Joules), m is the mass of the substance being heated (in grams), C is the specific heat capacity of the substance (in J/g - °C), and ΔT is the change in temperature (in °C).

In this case, we want to find the amount of energy required to heat 706 g of nickel from 25°C to 300°C, given that the specific heat capacity of nickel is 0.444 J/g - °C.

First, we need to calculate ΔT, which is the difference between the final temperature (300°C) and the initial temperature (25°C):

ΔT = 300°C - 25°C = 275°C

Next, we can plug in the values we know into the formula:

Q = m * C * ΔT

Q = 706 g * 0.444 J/g - °C * 275°C

Q = 70,219.4 J

Therefore, it would require approximately 70,219.4 Joules of energy to heat 706 g of nickel from 25°C to 300°C.

Ar has three naturally occurring isotopes  ³⁶Ar, ³⁸Ar, and ⁴⁰Ar. Each contains 18 electrons and protons. The no of neutrons in ³⁶Ar, ³⁸Ar, and ⁴⁰Ar are 18, 20 and 22 respectively. The mass number of ³⁶Ar, ³⁸Ar, and ⁴⁰Ar are 36, 38 and 40 respectively.

Protons and neutrons are positively charged and neutral species respectively found in the nucleus of an element. Whereas, electrons are negatively charged species present in the orbitals surrounding the nucleus.

The sum of number of protons and number of neutrons of an element is called the atomic mass. It is represented by the symbol "A". And, atomic number is defined as the number of electrons present in an element. It is represented by "Z".

Isotopes are defined as the elements which have the same atomic number but their atomic masses are different. Number of proton is equal to number of electrons present in an element.

The atomic number of ³⁶Ar, ³⁸Ar, and ⁴⁰Ar is 18.

∴ Neutrons = atomic mass - atomic number

Neutrons of ³⁶Ar = 36-18 = 18

Neutrons of ³⁸Ar= 38- 18= 20

Neutrons of ⁴⁰Ar = 40- 18= 22

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To transform 50.0 grams of ice at -15.0 °C into steam at 120.0 °C, 153.7 kJ joules of heat are required.

"Joules is neither a lifestyle brand neither does it offer attractive value," he claimed. "In a climate in which there is extreme pressure upon household budgets, the upscale high street market appears particularly vulnerable."

It makes use of responsible down that has been approved. Fur, angora, or the skin of exotic animals are not used. Certain animal products may be tracked back to the very beginning of manufacture. Overall, Joules receives a "Not good enough" rating.

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The solution has a boiling point of 100.354 °C and a freezing point of -1.2927 °C.

The boiling and melting points of a solution are affected by the number of solute particles present in the solvent. To determine these points, we need to calculate the molar concentration of glucose (C₆H₁₂O₆) in the solution.

First, we need to convert 25 g of glucose to moles. The molar mass of glucose is 180 g/mol, so 25 g of glucose is 0.139 moles.

Next, we need to calculate the molarity of the solution. Since we have 0.20 L of water, the total volume of the solution is 0.20 L. Therefore, the molarity of the solution is 0.139 moles / 0.20 L = 0.695 M.

Using the molal boiling point elevation constant for water of 0.51 °C/m, we can calculate the boiling point elevation of the solution. ΔTb = Kbm, where ΔTb is the boiling point elevation, Kb is the molal boiling point elevation constant, and m is the molality of the solution. For a 1.00 m aqueous solution, ΔTb is 0.51°C. So for our 0.695 m solution, ΔTb is (0.51°C/m) x (0.695 m) = 0.354°C. Therefore, the boiling point of the solution is slightly elevated from the boiling point of pure water (100°C) to 100.354°C.

To calculate the freezing point depression of the solution, we can use the formula ΔTf = Kfm, where ΔTf is the freezing point depression, Kf is the molal freezing point depression constant, and m is the molality of the solution. The molal freezing point depression constant for water is 1.86°C/m [3]. Thus, ΔTf = (1.86°C/m) x (0.695 m) = 1.2927°C. Therefore, the freezing point of the solution is depressed from the freezing point of pure water (0°C) to -1.2927°C.

In summary, the boiling point of the solution is 100.354°C, and the freezing point of the solution is -1.2927°C.

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