If 20cm^3 of potassium chloride was titrated with 60cm^3of 0.105M silver nitrate solution,calculate the molarity of potassium chloride solution

To prevent the time temperature  when transporting the food, the practice should be followed is the correct option is D. Transport potentially  haza-r-dous ( TCS) hot food in an ins-ul-ated food container at the 135  or the higher.

The average body of the temperature is 98.6  that is 37 °C. The average body temperature, is will be as the high as 99  that is 37.2 °C or will be low as the 97  that is 36.1 °C. The temperature may be varies that is based on the time of the day .

Thus, Transport cold potentially haza-r-dous (TCS) that  is hot food in the ins-ul-ated food container at the 135  or the higher.

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The volume of the N₂ gas at STP is 33,6 liter. 9,03 × 10²³ molecules of N2 gas equal 1,5 mol N₂.

Volume at STP or the molar volume for every gas at standard temperature and pressure is 22,4 liter/mol. To find out the volume of the N₂ gas at STP you can use the following steps:

Step 1: The first step you have to do is calculate the number of moles of the compound.

mol = number of particles ÷ Avogadro's number

     = 9,03 × 10²² ÷ 6,02 × 10²³

     = 9,03 ÷ 6,02

     = 1,5 mol

Step 2: The next step is to calculate the volume of N₂ in the STP state

Volume N₂ = n × volume at STP

                  = 1,5 mol × 22,4 liter/mol

                  = 33,6 liter

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We can use the radioactive decay formula to determine how much of the 24-gram sample of potassium-40 will remain after 3.75 billion years:

[tex]N = N0 * (1/2)^(t/T)[/tex]

where: N0 is the initial amount of the radioactive substance

N is the final amount of the radioactive substance

t is the time that has passed

T is the half-life of the radioactive substance

Plugging in the given values, we get:

[tex]N = 24 g * (1/2)^(3.75)[/tex])billion years / 1.25 billion years)

[tex]N = 24 g * (1/2)^3[/tex]

[tex]N = 24 g * 0.125[/tex]

[tex]N = 3 g[/tex]

Therefore, after 3.75 billion years, only 3 grams of the 24-gram sample of potassium-40 will remain.

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The correct order for atomic radius is:

d. Si > P > Ar > Na > Mg

The size of an atom increases as you go down a column in the periodic table, because each electron is added to a higher energy level farther away from the nucleus. The size of an atom decreases as you go across a row in the periodic table, because the effective nuclear charge increases, pulling the electrons closer to the nucleus.

We require the number of moles of solute and the volume of the solution in liters to determine the molarity of a solution. Initially, we must calculate the amount of moles of NaCl in 5.85 g. NaCl .

has a molar mass of 58.44 g/mol: NaCl moles = mass of NaCl / molar mass of NaCl moles = 5.85 g / 58.44 g/mol NaCl moles = 0.1 mol The volume of the solution must then be converted from milliliters to liters: 500 mL / 1000 mL/L solution volume 0.5 L solution volume We can compute the molarity of the solution now that we know the number of moles of NaCl and the volume of the solution in liters: molarity = solute moles / volume of solutio molarity = 0.1 mol / 0.5 L molarity = 0.2 mol/L Therefore, the molarity of the solution is 0.2 mol/L, which corresponds to option C.

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According to Beer-Lambert law, the absorbance of dye such as crystal violet is proportional to its molar concentration.

Beer-Lambert law says that, "there is a linear relationship between the absorbance of the solution and the concentration, which enables the concentration of a solution to be calculated by measuring its absorbance.

Beer Lambert law is basically used in chemistry to measure the concentration of chemical solutions, analyze oxidation, and measure polymer degradation. This law also explains the attenuation of radiation through the Earth's atmosphere.

The Beer-Lambert law is mathematically expressed as:

A = εLc

where,

A is the denotation for absorbance, ε is the molar extinction coefficient, l is the length of the path light which must travel in the solution in centimeters, and c is the concentration of a given solution.

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The p-alkalinity of the CaCO3 sample in ppm is 12.57.

In order to solve this problem, we need to use the balanced chemical equation for the reaction between the HCl and the alkalinity in the sample:

OH- + HCl -> H2O + Cl-

From the equation, we can see that each mole of HCl reacts with one mole of OH-. Therefore, the number of moles of OH- in the sample is equal to the number of moles of HCl that were added during the titration.

We can use this information to calculate the p-alkalinity of the sample as follows:

Calculate the number of moles of HCl that were added during the titration:

moles HCl = concentration of HCl x volume of HCl

= 0.0148 mol/L x 0.01810 L

= 0.00026788 mol

Since the reaction is 1:1 between OH- and HCl, the number of moles of OH- in the sample is equal to the number of moles of HCl that were added during the titration:

moles OH- = 0.00026788 mol

Convert the number of moles of OH- to ppm of CaCO3:

ppm CaCO3 = (moles OH-) x (1000000 ppm / 1 mol OH-) x (100 g CaCO3 / 2 mol OH-) x (1 L / 50.00 mL)

ppm CaCO3 = 267.88 ppm

Calculate the p-alkalinity:

p-alkalinity = 14 - log(ppm CaCO3)

= 14 - log(267.88)

= 12.57

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The one of the following that can be classified as a nonelectrolyte is HI. Nonelectrolytes are molecules that do not dissociate in water and do not conduct electricity, which means that they do not contain ions.

HI is a molecular compound composed of hydrogen and iodine, so it does not dissociate in water and does not conduct electricity, making it a nonelectrolyte. A nonelectrolyte is a substance that does not dissociate into its component ions when dissolved in a solvent such as water. This means that it does not conduct electricity and does not form a solution in which the ions can move freely. Nonelectrolytes are usually molecular substances, such as sugar, alcohol, and hydrocarbons, that contain only non-polar covalent bonds. When these substances are dissolved in water, they remain as intact molecules and do not break down into ions.

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While structural isomers share the same molecular formula, their atoms are bonded differently. Stereoisomers share the same atomic configurations and chemical formulae. Thus, option A is correct.

The term "structural isomer," also known as a "constitutional isomer," refers to a group of two or more organic compounds that share the same chemical formula but have different structures.

Isomers are compounds that share the same molecular formula but differ in the way their atoms or groupings are arranged or oriented.  Only the groups' spatial orientation within the molecule distinguishes them from one another.

The location of the methyl group varies between the two molecules below, despite having the same chemical formula.

Therefore, regioselective is the term that correctly describes a chemical reaction that favours one possible structural isomer over one or more other structural isomers.

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Sulfur dioxide (SO2) is typically formed by the combustion or oxidation of sulfur-containing materials. In the context of industrial processes, sulfur dioxide is commonly produced by burning sulfur-rich fuels such as coal and oil.

In nature, sulfur dioxide can also be formed by volcanic activity, as well as through the bacterial and chemical breakdown of organic matter that contains sulfur.Sulfur dioxide can be produced by the reaction of sulfur or sulfur-containing compounds with oxygen. For example, when sulfur is burned in the presence of oxygen, sulfur dioxide is formed according to the following reaction:

S (s) + O2 (g) → SO2 (g)

The reaction can also occur between sulfur compounds, such as hydrogen sulfide (H2S), and oxygen:

2 H2S (g) + 3 O2 (g) → 2 SO2 (g) + 2 H2O (g)

Sulfur dioxide is an important gas in the atmosphere, as it plays a role in regulating climate and air quality. However, high concentrations of sulfur dioxide can be harmful to human health and the environment, and so it is important to control and monitor its release into the environment.

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Silver has a 0.235 J/g°C specific heat.

The amount of energy needed to raise the temperature of a given mass of a substance by a certain quantity is measured by the substance's specific heat. In this issue, we are required to determine a piece of silver's specific heat given its mass and heat capacity.

According to the equation

specific heat = heat capacity/mass

specific heat = 85.7 J/°C / 362 g

Thus, 0.235 joules of energy are required to raise the temperature of 1 gm of silver by 1 degree Celsius. The thermal characteristics and behavior of a substance are significantly influenced by its specific heat.

Complete question:

A piece of silver of mass 362 g has a heat capacity of 85.7 J/°C. What is the specific heat of silver?

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In reference to the given data concerning the separation of the mixture, the percent by mass of salt in the mixture is 73.9%.

To find the percent by mass of salt in the mixture, we need to divide the mass of salt by the total mass of the mixture and multiply by 100.

First, we need to calculate the mass of sand in the mixture:

Mass of sand = Total mass of mixture - Mass of salt

Mass of sand = 2.18 g - 1.61 g = 0.57 g

Now we can calculate the percent by mass of salt in the mixture:

Percent by mass of salt = (Mass of salt / Total mass of mixture) x 100%

Percent by mass of salt = (1.61 g / 2.18 g) x 100%

The percent by mass of salt = 73.9%

Therefore, the percent by mass of salt in the mixture is 73.9%.

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The pyridinium cation in pyridinium chlorochromate (PCC) allows it to dissolve in organic solvents so it can be used in reactions in the absence of water.

Pyridinium chlorochromate (PCC) is a red-orange glasslike strong that is dissolvable in different organic solvents, like dichloromethane (CH2Cl2), chloroform (CHCl3), and CH3)2CO. The piece of PCC that permits it to break down in these organic solvents is the pyridinium cation (C5H5NH+).

The pyridinium cation is a positively charged particle that is shaped by the protonation of pyridine, a six-membered fragrant heterocyclic compound. The positive charge on the pyridinium cation makes it drawn to the negative charge on the chloride particle (Cl-), which is likewise present in PCC. The association between the decidedly charged pyridinium cation and the adversely charged chloride particle frames an ionic bond, which permits PCC to break up in natural solvents.

The dissolvability of PCC in organic solvents makes it helpful in numerous organic reactions where the presence of water should stay away. For example, PCC can be used as a mild oxidizing agent in the absence of water to convert primary alcohols to aldehydes and secondary alcohols to ketones.

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One of the key features of enzymes is that they are not consumed in chemical reactions and can be used again.

Enzymes are biological catalysts that accelerate chemical reactions by lowering the activation energy required for the reaction to occur. They are typically large, complex proteins that have a specific three-dimensional structure that allows them to interact with specific substrates, or reactants, in a particular chemical reaction.

Enzymes remain unchanged after a reaction, and can be used to catalyze the same reaction many times over. However, enzymes can be affected by changes in pH, temperature, or other environmental factors, which can alter their structure and affect their ability to catalyze reactions.

Enzymes are critical to many biological processes, including metabolism, digestion, and DNA replication. Without enzymes, many of these processes would occur too slowly to sustain life. Scientists have also developed ways to use enzymes in industrial processes, such as the production of biofuels and pharmaceuticals. The ability to use enzymes repeatedly in these applications makes them a valuable tool in the development of sustainable and efficient technologies.

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Silver chloride, often used in silver plating, contains 75.27% Ag. 450mg is the  mass of silver chloride in grams required to make 4.4 g of silver plating.

Silver is stable in clean air and clean water, but tarnishes whenever subjected to ozone, hydrogen sulfide, especially sulfurous air. Silver is largely utilized in electroplating for industrial purposes, notably electrical connections.

1 mole of AgCl, 0.7527 mol of Ag present.

1 mol of Ag is obtained from 1/0.75mol of AgCl

number of moles =  4.4 g / 107.87=0.002mol

0.002364 mol of Ag will be obtained from 0.002mol/ 0.7527 =0.003 mol

mass = moles × molar mass

        = 0.03 × 143.3=0.450g=450mg

Therefore, 450mg is the  mass of silver chloride in grams required to make 4.4 g of silver plating.

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Litmus is a type of dye that is extracted from lichens and is commonly used as a pH indicator. The color change from purple to pink indicates a change in the acidity or basicity of a solution.

In an acidic solution, the hydrogen ion (H+) concentration is high, which causes the litmus dye to change from its original blue color to red. In a neutral or basic solution, the hydrogen ion concentration is low, and the litmus dye remains blue. However, if the solution is sufficiently basic, the litmus dye will change from blue to pink. The exact mechanism of this color change is due to the chemical structure of the litmus dye, which contains a variety of functional groups that can interact with hydroxide ions (OH-) in a basic solution. This interaction causes a change in the electronic structure of the dye molecules, which results in a change in their absorption and transmission of light and, therefore, a change in color.

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Answer:

At lower altitudes, the air molecules are closer together and have more energy due to their increased interactions with each other. At higher altitudes, the air molecules are more spread out and have less energy due to their decreased interactions with each other. This can be represented by sketching molecular models of air at different altitudes.

At lower altitudes, the molecules are represented by a dense, tightly packed arrangement. At higher altitudes, the molecules are represented by a more spread out, less dense arrangement. This difference in density and energy can be seen in the models, and it explains why there is less energy in the samples at higher altitudes.

To produce 10 metric tons of ammonia using the Haber process, you would need approximately 8.23 metric tons of N2 and 0.79 metric tons of H2 as reactants.

The mass of the reactants and products must match for a chemical reaction to occur. The products will therefore have the same mass if you start with a specific amount of mass and it interacts.

The Haber process is a well-known industrial process used to produce ammonia. To calculate the mass of reactants needed to produce 10 metric tons of ammonia using the Haber process,

The balanced chemical equation for the Haber process is: The Haber process requires about 8.23 metric tonnes of N2 and 0.79 metric tonnes of H2 as reactants to produce 10 metric tonnes of ammonia.

A well-known industrial procedure for creating ammonia is the Haber process. The balanced chemical equation for the Haber process is: The mass of reactants required to make 10 metric tonnes of ammonia using the Haber process is:

N2 (g) + 3 H2 (g) = 2 NH3 (g)

Therefore, you must determine how many moles of NH3 are needed to make 10 metric tonnes (10,000 kg) of ammonia:

2NH3 is produced by the following equation: N2 (g) + 3H2 (g) (g)

Number of moles of NH3 = 10,000,000 g / 17.03 g/mol = 587,459.3 mol

Since three moles of H2 are required to produce two moles of NH3, the number of moles of H2 required can be calculated as:

Number of moles of H2 = (2/3) x Number of moles of NH3

Number of moles of H2 = (2/3) x 587,459.3 mol = 391,639.5 mol

Similarly, the number of moles of N2 required can be calculated as:

Number of moles of N2 = (1/2) x Number of moles of NH3

Number of moles of N2 = (1/2) x 587,459.3 mol = 293,729.7 mol

Finally, the mass of each reactant can be calculated using their respective molar masses:

Mass of N2 = Number of moles of N2 x Molar mass of N2 = 293,729.7 mol x 28.02 g/mol = 8,228,236.9 g = 8.23 metric tons

Mass of H2 = Number of moles of H2 x Molar mass of H2 = 391,639.5 mol x 2.02 g/mol = 790,136.2 g = 0.79 metric tons.

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The composition in at% Ag of the alloy is 85.2%.

To calculate the atomic percentage (at%) of Ag in the alloy,

we need to know the atomic weights of both Ag and Cu.

The atomic weight of Ag is 107.87 g/mol, while the atomic weight of Cu is 63.55 g/mol.

First, we can calculate the weight percentage of Cu in the alloy:

90.6 wt% Ag + x wt% Cu = 100 wt%

x wt% Cu = 100 wt% - 90.6 wt% Ag = 9.4 wt% Cu

Next, we can convert the weight percentage of Cu to the atomic percentage of Cu:

9.4 wt% Cu * (1 mol Cu/63.55 g) * ([tex]6.02\times10^{23 }[/tex]atoms/mol) = 8.36 x [tex]10^{22}[/tex] atoms Cu

100 wt% - 9.4 wt% = 90.6 wt% Ag

90.6 wt% Ag * (1 mol Ag/107.87 g) * (6.02 x [tex]10^{23}[/tex] atoms/mol) = 4.81 x [tex]10^{23}[/tex]atoms Ag

Now we can calculate the atomic percentage of Ag:

at% Ag = (4.81 x [tex]10^{23}[/tex] atoms Ag) / (4.81 x [tex]10^{23}[/tex] atoms Ag + 8.36 x [tex]10^{22}[/tex]atoms Cu) * 100%

at% Ag = 85.2%

Therefore, the composition in at% Ag of the alloy is 85.2%. Rounded to the nearest 0.1 at%, the answer is 85.2 at% Ag.

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There are fewer water molecules withinside the vapor (i.e., decrease vapor stress) above the NaCl solution than withinside the vapor above natural water.

The boiling factor of the NaCl answer can be extra than the boiling factor of natural water. The boom withinside the boiling factor of a 1.00 m aqueous NaCl answer can be about two times as massive as that of the glucose or sucrose answer due to the fact 1 mol of NaCl produces 2 mol of dissolved ions. Hence a 1.00 m NaCl answer could have a boiling factor of approximately 101.02°C.The addition of any non-unstable solute (including salt, baking soda or sugar) to a liquid will reason a lower in that drinks vapor stress. A liquid will begin to boil while its vapor stress is identical to the atmospheric stress, so a decrease vapor stress method you want a better temperature to boil the water.

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There is a direct relationship between temperature, speed, and kinetic energy of gas molecules is as the temperature increases, so does the average speed and kinetic energy of the gas molecules.

The temperature, speed, and kinetic energy of gas molecules are related to each other through the gas laws and the concept of ideal gases. According to the ideal gas law, the pressure, volume, and temperature of a gas are proportional to each other, and are directly proportional to the average kinetic energy of the gas molecules. This means that as the temperature of a gas increases, the average kinetic energy of its molecules also increases.

The relationship between temperature, speed, and kinetic energy can also be understood through the concept of random motion. Gas molecules are in constant random motion, bouncing off of each other and the walls of their container. The average kinetic energy of these molecules is directly proportional to the temperature of the gas. As the temperature of the gas increases, the average speed of its molecules also increases, and thus, so does their kinetic energy.

In mathematical terms, the average kinetic energy of a gas molecule can be represented as:

KE = (3/2)kT

where KE is the average kinetic energy, k is the Boltzmann constant, and T is the temperature in Kelvin.

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The acceleration of the car, given that it started from rest and move with a speed of 30 Km/h in half hour is 60 Km/h²

Acceleration is defined as follow:

a = (v – u) / t

The following data were obtained from the question:

The acceleration of the car can be obtained as follow:

a = (v – u) / t

a = (30 - 0) / 0.5

a = 30 / 0.5

a = 60 Km/h²

Thus, we can conclude from the above calculatuin that the acceleration of the car is 60 Km/h²

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When a mixture of helium and argon gas is expanded from a volume of to a volume of , while the pressure is held constant then work done on the gas will be W = -2.70 L atm .

To calculate the work done on the gas mixture, we can use the formula:

W = PΔV

where W is the work done, P is the constant pressure, and ΔV is the change in volume.

Assuming the initial volume of the gas mixture is V1 and the final volume is V2, and using the values given in the problem, we have:

ΔV = V2 - V1 = 9.50 L - 6.80 L = 2.70 L

Substituting this value along with the constant pressure of P = 1.00 atm, we get:

W = PΔV = (1.00 atm)(2.70 L) = 2.70 L atm

We should also consider the sign of the work done. Since the gas is expanding, the work done by the gas is negative (i.e., the system is doing work on the surroundings). Therefore, we need to assign a negative sign to the result:

W = -2.70 L atm (to two significant digits).

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A 145 mL flask contains argon at 1.3 atm and 65 ◦C. 6.12g is the amount of Ar is present. 0.34mol is the amount of Ar is present.

Argon is indeed a chemical element with the atomic number 18 and the symbol Ar. It is considered a noble gas and belongs to Periodic Group 18. [6] Argon, with 0.934%, is the third-most prevalent gas in the Earth's atmosphere (9340 ppm).

It is more than twice as plentiful than water vapor (which averages around 4000 ppm but fluctuates widely), 23 times as prevalent than carbon dioxide (400 ppm), as well as 500 times more abundant than neon (18 ppm).

P×V = n×R×T

1.3 ×145 = n×8.314× 65

n = 188.5 / 540.4 =0.34mol

mass = 0.34 ×18=6.12g

Therefore, 6.12g is the amount of Ar is present.

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The following orbital notation is for the element O (Oxygen).

Orbital notation is a way to describe the electron configuration of an atom. It consists of a combination of symbols and numbers that represent the energy level, type of orbital, and the number of electrons contained in that orbital.

The notation uses the letter symbols "s," "p," "d," and "f" to represent the different types of orbitals, and a superscript to indicate the number of electrons in the orbital. For example, the orbital notation for a carbon atom is "1s2 2s2 2p2," indicating that there are two electrons in the 1s orbital, two electrons in the 2s orbital, and two electrons in the 2p orbital.

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With 11 protons and 11 electrons, sodium (Na) is created. The valence shell, or second shell, of sodium is finished when an electron is donated. Hence, option 1 is correct answer.

The distribution of electrons among the many possible orbitals on an element's atom is known as its "electron configuration." The designations of the orbitals s, p, d, and f refer to groups of lines that were first detected in the spectra of the alkali metals. The sharp, primary, diffuse, and fundamental line groupings are among them.

The s-orbital, p-orbital, d-orbital, and f-orbital are among them. the first shell is known as the K shell because: Spectroscopist Charles G. Barkla gave the electron shells their names. As he observed that the X-rays produce two different sorts of energy, he gave the innermost shell the name K shell. He gave type A, higher energy, and type B, lower energy X-ray as additional names for those two energies.

The electron configuration of Sodium is

Na₁₁ = 1s² 2s² 2p⁶ 3s¹

When the sodium ion denotes 1 electron to another atom, then the electron configuration becomes,

Na⁺ = 1s² 2s² 2p⁶

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Answer:

It's option D

Explanation:

Option (b) is correct. When 100ml of diethyl ether is added to 100ml of water and thoroughly mixed, the diethyl ether will form a separate layer on the top of the water layer due to Van der Waals forces.

When we mix diethyl ether and water, they do not mix. They would quickly separate out with the ether layer on top as it is less dense. This process is frequently used to separate the products of organic synthesis.- The product is more soluble in diethyl ether than water that is shaken with diethyl ether multiple times and the ether layers collected usually for further purification. Diethyl ether does not form hydrogen bonds and only has Van Der Waals forces between the molecules This will be referred to as Dipole-Dipole. Water cannot hydrogen bond to the diethyl ether molecules and has very weak van der waals forces and dipole-dipole forces it is bonded more strongly to itself than the diethyl ether. Diethyl ether molecules are bonded more strongly to each other. so they separate out into two layers.

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The complete question is ,

what will happen when 100 ml of diethyl ether is added to 100 ml of water and thoroughly mixed?

(a) the temperature of the mixture will significantly increase.

(b) diethyl ether will form a separate layer on top of the water layer.

(c) water will form a separate layer on top of the diethyl ether layer.

(d) diethyl ether will fully dissolve in water.

(e) there will be a chemical reaction between diethyl ether and water.

Answer: 32 atomic mass units

Explanation:

carbon is 14

hydrogen is 1 each

oxygen is 16