how many grams of ethanol, c2h5oh, are required to make a 7.1 molar solution using 160.0 ml of water? (molar is the term chemistry and biologists use for a solution of that molarity, no teeth involved)

The volume of hydrogen at STP is required to produce 25 g of ammonia is 37.5 g.

The balanced equation for the formation of ammonia is given as follows

N₂ + 3H₂ → 2NH₃

The stoichiometry of H₂ to NH₃ is 3 : 2.

Avagadros law states that "at volume of gas is proportional to number of moles of gas at constant pressure and temperature."

Therefore, the molar ratio is equivalent to volume ratio,

Hence, the volume ratio of H₂ to NH₃ is 3 : 2

It can be concluded that 2 L of NH₃ requires 3 L of H₂.

Then 25.g of NH₃ requires = 3/2 x 25 = 37.5 g of H₂

So, volume of H₂ required is 37.5 g.

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False. A sugar is classified as a D isomer if the hydroxyl group on its penultimate carbon (the second to last carbon) is oriented to the right in its Fischer projection.

In a Fischer projection, the horizontal lines represent bonds that are coming out of the plane of the paper, while the vertical lines represent bonds that are going into the plane of the paper. The orientation of the hydroxyl group on the penultimate carbon is determined by looking at the Fischer projection so that the

group is at the top, and the molecule is oriented vertically.

If the hydroxyl group on the penultimate carbon is oriented to the right in the Fischer projection, the sugar is classified as a D isomer. If the hydroxyl group on the penultimate carbon is oriented to the left in the Fischer projection, the sugar is classified as an L isomer.

It's worth noting that the position of the hydroxyl group on the carbon farthest from the carbonyl group does not affect whether a sugar is classified as a D or L isomer. This carbon is not the anomeric carbon, and it does not determine the overall stereochemistry of the molecule.

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The theoretical yield of MgO in grams would be 90.6 grams.

What do you mean by theoretical yield?

The theoretical yield is basically the amount of product that is expected to be produced from a given reaction, taking into account the limiting reactant, according to the stoichiometry of the reaction. It is calculated using the balanced equation for the reaction.

This is because the equation given is a 1:1 ratio, meaning that for every 1 mole of Mg, 1 mole of MgO would be produced. Since we know that the given amount of Mg is 90.6 grams, the theoretical yield of MgO would be the same: 90.6 grams.

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Orange juice has a pH of 3.5,Drain cleaner has a pH of 13.The pH scale is a measure of the acidity or basicity (alkalinity) of a solution, ranging from 0 (most acidic) to 14 (most basic), with 7 being neutral.

Based on the given pH values, we can classify each substance as acidic, basic, or neutral:

Orange juice has a pH of 3.5, which is below 7, indicating that it is acidic. Orange juice is acidic due to the presence of citric acid, which is a weak organic acid found naturally in citrus fruits.

Drain cleaner has a pH of 13, which is above 7, indicating that it is basic (alkaline). Drain cleaners are typically basic due to the presence of strong alkaline compounds such as sodium hydroxide (NaOH) or potassium hydroxide (KOH), which are used to dissolve clogs in drains and pipes.

In summary, based on their pH values, orange juice is acidic and drain cleaner is basic. It is important to note that both acids and bases can be harmful if not used or handled properly, and caution should always be exercised when working with them.

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In water, a substance that is ionizes totally and completely in solution is called strong electrolyte.

Ionization is a process in which a neutral snippet or patch earnings or loses one or further electrons. The performing charged snippet/ patch is called an ion. A appreciatively charged ion is called a cation, while a negatively charged ion is called an anion.

The ionization process is used in a wide variety of outfit, for illustration, spectrometer, radiation remedy, fluorescent lights,etc.

Strong electrolytes are ones that completely ionise or dissociate in their aqueous solution.

These electrolytes have a higher extension of ionisation and a high electrical conductivity.

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Volume is the amount of space taken up by an object

The instrument used to measure liquid volume is called a graduated cylinder.

The formula used to calculate the volume of a solid object such as a rectangular prism is: V =  length, *  width * height

Volume is a measure of the amount of space that a substance or object occupies. It is typically measured in units such as liters, cubic meters, gallons, or cubic feet.

The instrument used to measure liquid volume is called a graduated cylinder. It is a cylindrical tube made of glass or plastic, with volume markings along its length that allow for the accurate measurement of liquids.

The formula used to calculate the volume of a solid object depends on its shape. Here are some common formulas for finding the volume of different types of solid objects:

Cube: V = s³ (where s is the length of one side of the cube)

Rectangular prism: V =  length, *  width * height

Sphere: V = 4/3πr³ (where r is the radius of the sphere)

Cylinder: V = πr^2h (where r is the radius of the cylinder and h is its height)

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{2 NO2 ->[\Delta] 2NO + O2}  This reaction is an exothermic reaction and occurs in an Oxidation-Reduction Reaction and balanced equation for the overall chemical reaction

Overview of NO2 Decomposition The decomposition of nitrogen dioxide (NO2) is a complex chemical reaction that involves a series of intermediate steps. In its most basic form, the overall reaction can be described as NO2 reacting with oxygen to form nitrogen monoxide (NO) and oxygen (O2). The particulate model of this reaction shows the detailed steps involved in the reaction. Intermediate Steps The particulate model of the NO2 decomposition process begins with NO2 reacting with oxygen to form nitrogen monoxide (NO) and oxygen (O2). This is a two-step reaction, with the first step being the formation of nitrogen dioxide (NO2) and oxygen (O2) as intermediate products:

{2 NO2 <=>[\Delta] NO2 + O2}

The second step is the reaction of the nitrogen dioxide (NO2) and oxygen (O2) to form nitrogen monoxide (NO) and oxygen (O2):

{2 NO2 + O2 ->[\Delta] 2NO + O2}

Balanced Equation The overall chemical reaction for the decomposition of NO2 can be expressed as a balanced equation:

{2 NO2 ->[\Delta] 2NO + O2} The reaction is an exothermic reaction and produces heat. This is an example of an Oxidation-Reduction Reaction, as the nitrogen dioxide (NO2) is oxidized to form the nitrogen monoxide (NO), while the oxygen (O2) is reduced to form oxygen (O2).

The decomposition of NO2 is a complex chemical reaction that involves a series of intermediate steps. The particulate model of the reaction shows the detailed steps involved in the reaction, starting with the formation of nitrogen dioxide (NO2) and oxygen (O2) as intermediate products, and then the reaction of the nitrogen dioxide (NO2) and oxygen (O2) to form nitrogen monoxide (NO) and oxygen (O2). The overall chemical reaction for the decomposition of NO2 can be expressed as a balanced equation. This reaction is an exothermic reaction and occurs in an Oxidation-Reduction Reaction

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6.0 moles of magnesium (Mg) metal would be produced if 12 moles of potassium (K) reacted.

What is magnesium?

Magnesium is a chemical element with the symbol Mg and atomic number 12. It is a silvery-white, shiny, and highly reactive metal. Magnesium is the ninth most abundant element in the universe and the eighth most abundant element in the Earth's crust. Magnesium is an essential mineral and is particularly important for human metabolism, being involved in over 300 biochemical reactions. It is required for the proper functioning of muscles, nerves, and enzymes and helps to regulate blood sugar levels, blood pressure, and the body's calcium levels.

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The correct answer is

A reasonably straightforward technique for creating an estimate for an unknown parameter is maximum likelihood (MLE).

Assume that the random variables X1, , and Xn make up a random sample from the distribution f(x|); f(x|) is a point mass function for continuous random variables and a pdf for discrete random variables, respectively. We use the sign — to denote the fact that the distribution also depends on the parameter, which might be either a single parameter or a vector of parameters with real values. We define f(x1, , xn|) = f(x1|) f(xn|) for each observed random sample x1, , xn (1)

The joint probability is f(x1, , xn|) if f(x|) is pmf and the joint density function is f(x1, , xn|) if f(x|) is pdf. The likelihood function is now denoted by the notation f(x1, , xn|). As can be seen, the unknown parameter affects the likelihood function.

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The larger the oligonucleotides , the less distance it will travel. Therefore, in the order of decreasing distance traveled:

AAACT → AGGGAAG → CTACGTGCG → TTTGCGTATTT → GTATGTTCACCCGTC

Oligonucleotides:

Oligonucleotides are short DNA or RNA molecules, oligomers, widely used in genetic testing, research, and forensics. Typically produced in the laboratory by solid-phase chemical synthesis, these small fragments of nucleic acids can be made into single-stranded molecules by user-specified sequences, making them essential for artificial gene synthesis, polymerase chain reaction (PCR), DNA sequencing, molecular cloning and molecular probes.

Oligonucleotides are chemically synthesized using building blocks, protected phosphonamidites, natural or chemically modified nucleosides or, to a lesser extent, non-nucleoside compounds. Assembly of the oligonucleotide chain occurs in the 3' to 5' direction according to a general procedure called the "synthetic cycle". The maximum length of synthetic oligonucleotides barely exceeds 200 nucleotide residues. Products can be isolated in any order using HPLC and other methods.

Complete Question:

Rank these oligonucleotides according to distance traveled in an electrophoretic separation

TTTGCGTATTT

AGGGAAG

GTATGTTCACCCGTC

CTACGTGCG

AAACT

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A standard EpiPen contains approximately 0.3 milligrams of epinephrine, which is equivalent to 0.3 milliliters of a 1:1000 solution, or 3 micrograms of epinephrine per dose. there are approximately 9.83 x 10^20 molecules of epinephrine in a standard EpiPen.

Epinephrine, also known as adrenaline, is a hormone and neurotransmitter that is produced naturally by the body in response to stress or danger. It acts on the sympathetic nervous system to increase heart rate, constrict blood vessels, dilate airways, and mobilize energy stores in the body. It is also used as a medication to treat severe allergic reactions, such as anaphylaxis.

A standard EpiPen is a self-administered device that contains a single dose of epinephrine in a prefilled syringe. The EpiPen delivers the medication through a spring-loaded mechanism that injects the solution into the thigh muscle. The dose is typically 0.3 milligrams (or 0.3 milliliters) of a 1:1000 solution of epinephrine, which means that there is 1 milligram of epinephrine in 1000 milliliters of solution.

To calculate the number of molecules of epinephrine in a standard EpiPen, we need to know the molecular weight of epinephrine and Avogadro's number, which is the number of molecules in one mole of a substance. The molecular weight of epinephrine is approximately 183 grams per mole, which means that one mole of epinephrine contains Avogadro's number (6.02 x 10^23) molecules.

Since the dose of epinephrine in a standard EpiPen is 0.3 milligrams, we can convert this to micrograms by multiplying by 1000, which gives us 300 micrograms. To calculate the number of molecules of epinephrine in 300 micrograms, we need to use the formula:

Number of molecules = (mass in micrograms/molecular weight) x Avogadro's number

Plugging in the values for epinephrine, we get:

Number of molecules = (300/183) x 6.02 x 10^23

Simplifying this expression gives us:

Number of molecules = 9.83 x 10^20

Therefore, there are approximately 9.83 x 10^20 molecules of epinephrine in a standard EpiPen.

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Tetraminobutane (1,1,4,4) has four amino groups and is a kind of diamine that can be combined with other diamines, diacids, or diacyl chlorides to create polyamides.

Tetraminobutane (1,1,4,4) has the chemical formula C6H16N4 and is a diamine compound. Because it is a highly branched chemical with four amino groups at the ends of each branch, it can be used in polymer chemistry cross-linking and branching reactions. In the synthesis of polyamides, which are high-performance polymers with several uses in the textile, automotive, and aerospace sectors, TMB is frequently utilised as a co-monomer. TMB is a special building block for the design and synthesis of new polymeric materials with specialised properties and functionality thanks to its high reactivity, branching potential, and cross-linking capability.

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The change in enthalpy for the reaction of 4.00 g of CH4(g) burning in excess oxygen according to the reaction: CH4(g) + 2 O2(g) → CO2(g) + 2 H2O(g); H°rxn = –802.2 kj is  200.6 kJ.

Calculate the number of moles of CH4(g) using the molar mass of CH4(g):
4.00 g CH4(g) / 16.04 g/mol = 0.2494 mol CH4(g)

Use the balanced chemical equation to determine the ratio of moles of CH4(g) to the change in enthalpy:
1 mol CH4(g) : -802.2 kJ

Use the ratio to calculate the change in enthalpy for the given amount of CH4(g):
0.2494 mol CH4(g) x (-802.2 kJ / 1 mol CH4(g)) = -200.6 kJ

Therefore, the change in enthalpy for the reaction of 4.00 g of CH4(g) burning in excess oxygen is -200.6 kJ.

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The likelihood of side reactions and the formation of byproducts during the nitration of methyl benzoate increases at higher temperatures due to the increased reactivity and concentration of the reactive species, and the decreased stability of the nitronium ion.

In the nitration of methyl benzoate reaction, the reaction is typically carried out by adding a mixture of concentrated nitric acid and sulfuric acid to methyl benzoate. This reaction is exothermic and the heat generated from the reaction can cause the reaction mixture to heat up.

At higher temperatures, there is an increased likelihood of side reactions occurring. One common side reaction that can occur during the nitration of methyl benzoate is the formation of byproducts such as dinitromethyl benzoate and trinitromethyl benzoate. These byproducts are formed when excess nitric acid reacts with methyl benzoate, rather than just a single nitro group being added to the benzene ring.

The formation of these byproducts is favored at higher temperatures because the reaction rate of the nitration reaction increases with temperature, and the concentration of the reactive species is higher at higher temperatures. This means that there is a greater likelihood of excess nitric acid being present and reacting with the methyl benzoate at higher temperatures, which can result in the formation of the unwanted byproducts.

Furthermore, the stability of the nitronium ion, which is the key reactive species in the nitration of methyl benzoate, decreases at higher temperatures. This can lead to the formation of other unwanted side products, such as benzene, due to the decomposition of the nitronium ion.

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Answer:

This explanation could be improved by specifying the two substances being compared and giving more detailed information about their properties, such as their chemical structure, molecular formula, and other physical and chemical characteristics. Additionally, describing why the two substances have different properties, such as differences in bonding type or molecular arrangement, could provide a more comprehensive explanation.

C. Fast growth rate would be the most useful trait for these farmers.

Selective breeding is used to produce a crop with desired characteristics, such as a fast growth rate. A fast growth rate is beneficial to farmers in northern areas with short summer seasons because it allows the wheat to mature quickly and be harvested in a shorter amount of time, thus providing a larger yield despite the shorter growing season.Selective breeding is a process of selecting chemical compounds with specific desired properties and breeding them together to create a new compound with the desired traits. This is done by rearranging the chemical bonds between the two compounds and creating a new molecule with the desired characteristics. This process is known as chemical hybridization.

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complete question:Scientists plan to use selective breeding to produce a new type of wheat for farmers who live in northern areas with short summer seasons. Which of these traits would be MOST useful for these farmers?

a.large seed size

b.long stem length

c.fast growth rate

d.shallow root systems

False. Students typically determine the freezing point by finding the intersection of the two lines on the graph, not by determining the best fit lines from the two regions.

The temperature at which a material transitions from a liquid to a solid form is known as its freezing point.At this temperature, the molecules of the substance slow down enough to form a crystalline structure. Different substances have different freezing points, depending on the type of molecules and the strength of the intermolecular forces. Generally, the freezing point of a substance decreases with an increase in pressure.This transition occurs because the molecules are no longer able to move freely, as the intermolecular forces holding them together are stronger than the thermal energy of the system.

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Maltose, which has the chemical formula C12H22O11, is created when three glucose molecules are joined together by dehydration processes.

Maltose, with the chemical formula C12H22O11, is created when dehydration events join three glucose molecules together.

Each glucose molecule that is bonded together during the dehydration event results in the removal of one water molecule. This joins the molecules together in a glycosidic bond, resulting in the disaccharide maltose.

By deducting the total number of water molecules lost from the combined molecular formula of the three glucose molecules, one may get the molecular formula of maltose. Three dehydration processes remove three molecules of water, each of which removes one. Maltose has the chemical formula (C6H12O6)3 - 3H2O, which is translated to C12H22O11 as a result.

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The molecular formula for glucose is C6H12O6. What would be the molecular formula for a molecule made by linking three glucose molecules together by dehydration reactions?

The water features are often associated with the condensation is the correct option are The Ocean and the Clouds and Dew.

The Condensation is the process where the water vapor will becomes the liquid. The condensation is the reverse of the evaporation, in which the liquid water becomes the water vapor. The Condensation is occurs one of the two ways: the first way is the air is cooled to the dew point and  it will becomes so saturated with the water vapor  and it cannot be hold  more of the water.

Thus, The Ocean and the Clouds and Dew is the feature of water that is connected with the condensation.

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All atoms of uranium have the same atomic number, which is 92. This means that every uranium atom has 92 protons in its nucleus.

The number of protons determines the element's identity, so all atoms of uranium have the same chemical properties.

The mass number of uranium, however, may vary between different isotopes. Uranium has two major isotopes, uranium-235 and uranium-238, which have 143 and 146 neutrons, respectively. The sum of protons and neutrons in the nucleus of an atom is called its mass number. Therefore, the mass number of uranium-235 is 235 (92 protons + 143 neutrons) and the mass number of uranium-238 is 238 (92 protons + 146 neutrons).

The number of neutrons plus electrons is not a commonly used term in describing atomic properties. The number of electrons in a neutral atom is equal to the number of protons, which is 92 in the case of uranium. However, the number of neutrons plus electrons may vary depending on the ionization state of the atom.

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(b) Water. The liquid is most likely Water.

The density of a liquid can be determined by dividing its mass by its volume. In this case, the mass of the graduated cylinder with liquid is 145 grams and the volume of liquid is 100 ml. Therefore, the density of the liquid is 1.45 g/ml. Water has a density of 1 g/ml, which is closest to the given density of 1.45 g/ml.

The cylinder has a 100 ml capacity.

Moreover, the liquid-filled cylinder weighs 145 g.

The weight of the cylinder when empty is 45 g.

Now,

Fluid mass is 145 - 45 g.

= 100 g

The liquid's density is  

=[tex]\frac{mass of liquid}{volume of liquid}[/tex]

=[tex]\frac{100g}{100ml} =\frac{1g}{1ml}[/tex]

= 1 gm/ml

Knowing that 1 ml equals 1

Density equals 1 g/cc. Therefore, the liquid is most likely water.

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complete question:A graduated cylinder contains 100ml of liquid the mass of the graduated cylinder with the liquid is 145 gram the mass of the graduated cylinder when empty is 45 grams the liquid is most likely

(a) Ethanol

(b) Water

(c) Corn oil

(d) Chloroform​

Answer:

yes I am good at the subject. That is my course

The temperature change is  6.1 °C .

Temperature change refers to a change in the degree of hotness or coldness of an object or system. It is a measure of the amount of heat added or removed from an object or system and is expressed in units of temperature.

Temperature change occurs when heat is transferred from one object to another or when heat is added to or removed from a system. This transfer of heat can be due to a variety of factors, including conduction, convection, radiation, and phase changes.

The temperature change is;

22.1°C - 16.0 °C

= 6.1 °C

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Liquids and solids have fixed volumes because their particles are packed tightly and have little free space to move around.

When pressure is applied, the particles in these materials are forced closer together, but because of their fixed positions, they cannot move closer to each other. The result is that the volume remains constant.

The behavior of liquids and solids is different from gases, which are compressible and have variable volumes that can change when pressure is applied. This is because the particles in a gas have much more free space to move around and can be easily compressed or expanded by pressure.

It is important to note that while the volume of a liquid or solid may not change when pressure is applied, the density of the material can change. Increasing pressure can cause the particles to become more closely packed, increasing the material's density.

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When a nonvolatile solute is added to a liquid, the concentration of the solute increases, which leads to a decrease in the vapor pressure of the solvent.

This is due to the fact that the solute particles occupy some of the space that would otherwise be filled by the solvent molecules. Since the solvent molecules have fewer spaces to escape into, the number of solvent molecules that escape into the air above the solution decreases, and therefore, the vapor pressure of the solvent decreases.

This decrease in vapor pressure is proportional to the concentration of the solute, and it is the basis for the phenomenon of vapor pressure lowering. This effect is important in many chemical and physical processes, such as boiling and evaporating, because it affects the temperature at which the solvent will boil.

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Stakes' law is valid for any object falling into water or any other liquid. Yes, you can use Stokes' law if liquid oil is falling into water.

Stake's Law:

In 1851, George Gabriel Stokes derived Stokes' law (also called drag) for the frictional force acting on a spherical body with a very low Reynolds number in a viscous fluid. Stokes' law is derived by solving the Stokes flow limit for small Reynolds numbers in the Navier-Stokes equation.

Gambling's law is a mathematical equation that describes the rate of sedimentation of small spherical particles in a liquid medium. This law is derived by considering the force acting on a particular particle as it sinks in the thickness of a liquid under the influence of gravity. In a viscous fluid, the force slowing the sphere's motion is directly proportional to the velocity and radius of the sphere as well as the viscosity of the fluid.

From the viscosity equation according to Stake's law, we know that the viscous force acting on a sphere is directly proportional to the following parameters:

The force of viscosity on a small sphere moving through a viscous fluid is given by:

[tex]F_{d}[/tex] = 6πμRv

Where,

[tex]F_{d}[/tex] is the frictional force known as Stokes drag, acting at the interface between the fluid and the particle

μ is the dynamic viscosity (some authors use the symbol η)

R is the radius of the spherical object

v is the velocity relative to the flowing object

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The brine a more effective de-ice solution than solid ice melt products is the correct option is : Since brine is already a solution, the Van't Hoff Factor is higher than solid salt, making the freezing point depression greater.

The Brine, is the concentrated salt solution, that is better to prevents and to eliminates the ice from the roads, but it can be more costly to store it. Since the brine is already the solution, the Van't Hoff Factor will be higher than the solid salt, the making is the freezing point depression is greater.

Freezing point depression requires a solution to occur. Brine starts as a solution, where solid salt must form a solution first.

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There are 6 orbitals that are completely filled in an atom with 12 electrons.

This is because the maximum number of electrons that can fill each orbital is two. The electron configuration of an atom with 12 electrons is 1s2 2s2 2p6 3s2, which means that the 1s and 2s orbitals are both filled with two electrons, and the 2p orbital is filled with six electrons. Thus, there are six orbitals that are completely filled.Magnesium is an essential element that plays a critical role in many of the body’s metabolic processes. It is involved in energy production, DNA synthesis, and in the formation of muscles, bones, and other tissues.

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According to the Boyle's law, at constant temperature,  the pressure of

the gas is 1.99 atmospheres.

Boyle's law is an experimental gas law which describes the behavior of gas as  pressure of the gas decreases the volume increases. It's statement can be stated as, the absolute pressure which is exerted by a given mass of an ideal gas is inversely proportional to its volume provided temperature and amount of gas remains unchanged.

According to the equation the unknown pressure and volume of any one gas can be determined if two gases are to be considered.That is,given by the equation

P₁V₁=P₂V₂substitution of values gives

P₂= 1.15×215/124=1.99 atmospheres.

Thus,  at constant temperature,  the pressure of the gas is 1.99 atmospheres.

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The solubility of a gas in a liquid generally decreases as the temperature increases. This means that as the temperature increases, the amount of gas that can dissolve in a given volume of liquid decreases.

This relationship between temperature and solubility of gases is described by Henry's Law, which states that the solubility of a gas in a liquid is directly proportional to the pressure of the gas above the liquid.

As the temperature increases, the pressure of the gas above the liquid increases, leading to an increase in the number of gas molecules escaping from the liquid into the gas phase. This increase in the number of gas molecules in the gas phase reduces the amount of gas that can dissolve in the liquid, thereby decreasing the solubility of the gas.

For example, when a carbonated beverage is heated, the solubility of carbon dioxide decreases, causing it to escape from the liquid and form bubbles. This is why the beverage becomes less carbonated as it is heated.

In conclusion, the solubility of a gas in a liquid generally decreases as the temperature increases due to the increase in the pressure of the gas above the liquid and the corresponding increase in the number of gas molecules escaping from the liquid.

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