What is the volume/volume percent concentration of a solution prepared from 12 ml of ethyl acetate in 410 ml of solution

Answer:

hydrogen bonds are also known as electrostatic dipole interaction

Answer:

14kg

Explanation:

your equation is wrong ?

it is meant to be c+o=co

we have the mass of c so we calculate the mole and mole =mass\molar mass

molar mass(M) of carbon is 12 so our mole is

6/12=0.5 mol

note the unit of mole is mol

so since from the equation 1c+1o=1co we see that there is an invincible 1 there fore c and co is 1:1 so therefore o.5 mol of c will produce o.5 mol of Co

if the ratio was 1:2 it would have been therefore 0.5 mol of c will make 0.5/2 mol of Co.

but that is not the case so back to what we were saying. note(just saying and example,not part of answer )

to find mass of Co it will be mole = mass/ M

so mass= mole × molar mass and the molar mass of Co is (12)+(16)=28 kg/mol so our mass will be 0.5×28= 14kg

therefore the mass of Co is 14kg

The leading scientific theory on how the first nuclear membrane originated is the theory of "endomembrane system." Endomembrane system theory suggests that the nuclear membrane's ancestor could have evolved from a pre-existing membrane in the endomembrane system, such as the ER or golgi, rather than developing from scratch or being acquired from engulfment by endocytosis.

The endomembrane system consists of a series of flattened membrane sacs (cisternae) and vesicles that are interconnected and divide the cell into separate compartments. One of these compartments, called the nuclear envelope, encloses the genetic material in the nucleus and is made up of two separate lipid bilayer membranes.The inner nuclear membrane (INM) is adjacent to the nucleoplasm and is made up of proteins that are linked to the nuclear lamina, a mesh-like structure that provides support and stability. The outer nuclear membrane (ONM) is contiguous with the endoplasmic reticulum (ER) and has ribosomes on its surface.

The nuclear pores, which allow macromolecules to move between the nucleus and the cytoplasm, are formed by the interaction of the inner and outer membranes. According to this theory, the nuclear envelope's precursor evolved from an ancestral membrane that was used to generate vesicles and compartments during eukaryotic cell evolution. Over time, a double lipid bilayer may have evolved to provide additional insulation for the genetic material and, as a result, greater control over gene expression.

The endomembrane system is thought to have evolved from the invagination of the plasma membrane, and the nuclear membrane is believed to have arisen from a similar process. This is supported by the fact that the outer nuclear membrane is connected to the ER, which shares a common membrane-bound origin. In this sense, the endomembrane system is thought to have contributed to the origin of the nuclear membrane through evolutionary mechanisms.

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If 120 cm³ of oxygen gas is collected at 713.3 mm Hg pressure, the volume of the dry gas at STP is 0.102 cm³.

To solve this problem, we will use the ideal gas law, which relates the pressure, volume, temperature, and number of moles of a gas:

PV = nRT

First, we need to convert the given conditions to the correct units. The temperature is already in Celsius, so we need to convert it to kelvins by adding 273.15:

T = 27 + 273.15 = 300.15 K

The pressure is given in millimeters of mercury (mm Hg), so we need to convert it to atmospheres (atm) to use in the ideal gas law. There are 760 mm Hg in 1 atm, so:

P = 713.3 mm Hg / 760 mm Hg/atm = 0.938 atm

Next, we can use the ideal gas law to find the number of moles of oxygen gas:

n = PV/RT = (0.938 atm)(120 cm³)/(0.08206 L·atm/(mol·K))(300.15 K) = 0.00454 mol

Finally, we can use the molar volume of a gas at STP (standard temperature and pressure) to find the volume of the dry gas at STP. At STP, the temperature is 273.15 K and the pressure is 1 atm. The molar volume of a gas at STP is 22.4 L/mol, so:

V = n(22.4 L/mol) = (0.00454 mol)(22.4 L/mol) = 0.102 cm³

Therefore, the volume of the dry gas at STP is 0.102 cm³.

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Approximately 225 sec, it will take for 75 percent of the initial amount of C\(_{25}\)H\(_3\)ON\(_3\)⁺(aq) to react. Therefore, the correct option is option B.

The logarithm of a ratio of incident over transmitted radiant power throughout a sample is known as absorbance. As an alternative, absorbance can be characterized simply "the negative logarithm with one less absorptance, as determined on a homogeneous sample," for samples that scatter light.

In several technical fields, the phrase is used to describe how experimental measurement data are quantified. Although the phrase refers to measuring how much light is absorbed, it is frequently confused with measuring how much light is "lost" to either a detector system by other methods. Approximately 225 sec, it will take for 75 percent of the initial amount of C\(_{25}\)H\(_3\)ON\(_3\)⁺(aq) to react.

Therefore, the correct option is option B.

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Your question is incomplete but most probably your full question was,

Approximately how long will it take for 75 percent of the initial amount of C25H30N3. +(aq) to react?

A. 75 sec.

B. 225 sec.

C. 300 sec.

D. 600 sec

The addition of HNO3 to the equilibrium will cause a shift towards the left-hand side of the equation, resulting in a decrease in the concentration of CrO4-2 ion.

This is because the H+ ions from the HNO3 will react with the Cr2O7-2 ion to form more HCrO4-1. As a result, the equilibrium will shift towards the left, decreasing the concentration of CrO4-2 ion. This is a long answer that explains the reasoning behind the decrease in concentration of CrO4-2 ion.

The given equilibrium, the reaction can be represented as:
CrO4^(-2) (aq) + 2 H^(+1) (aq) ⇌ Cr2O7^(-2) (aq) + H2O (l)
When HNO3 is added to the system, the concentration of H(+1) ions will increase. According to Le Chatelier's principle, the equilibrium will shift to counteract this change. In this case, the reaction will shift to the right, favoring the formation of Cr2O7(-2) ions and water. As the equilibrium shifts to the right, the concentration of CrO4(-2) ions will decrease. So the correct answer is (b) Decrease.

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Answer:

b

Explanation:

The group of unsaturated hydrocarbons which 2 carbons are double bonded together, with H bonded to the left, and C H 2 bonded below left, above right, and below right is derived from Alkenes

Organic compounds are compounds which contains carbon and hydrogen

Some few classes or organic compounds or hydrocarbons are as follows:

So therefore, the group of unsaturated hydrocarbons which 2 carbons are double bonded together, with H bonded to the left, and C H 2 bonded below left, above right, and below right is derived from Alkenes

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Answer:

The answer is A.) Alkene

All the answers in that section are:

Alkene

Aromatic Hydrocarbon

Alkene

Alkyne

Explanation:

Here's the picture as proof. Hope it helps!

Please provide the calorimeter data, and we will be able to complete the calculations and determine the latent heat of fusion of mercury.

To determine the latent heat of fusion of mercury with a specific heat of 1.38 J/kg°C, we will use the calorimeter data provided in the question.

Step 1: Identify the data given.

Unfortunately, the calorimeter data is not provided in the question. Please provide the data for us to proceed with the calculations.

The required data includes mass, initial temperature, and final temperature of mercury and the calorimeter.

Step 2: Calculate heat absorbed or released by mercury.

Once the calorimeter data is provided, we can use the formula Q = mcΔT, where Q is the heat absorbed or released, m is the mass of mercury, c is the specific heat (1.38 J/kg°C),

and ΔT is the change in temperature (final temperature - initial temperature).

Step 3: Calculate heat absorbed or released by the calorimeter.

Using the calorimeter data, we can calculate the heat absorbed or released by the calorimeter as well. The formula is the same: Q = mcΔT.

However, the specific heat and mass will be different as they correspond to the calorimeter.

Step 4: Calculate the total heat absorbed or released.

Since the heat absorbed by one substance is equal to the heat released by the other, we can add the two heats calculated in steps 2 and 3 to get the total heat absorbed or released (Q_total).

Step 5: Determine the latent heat of fusion.

Finally, we can determine the latent heat of fusion (L) using the formula L = Q_total / m, where m is the mass of mercury. This will give us the latent heat of fusion in J/kg.

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The correct alternatives of the blanks are -

Blank 1 - Gases.

Blank 2 - Liquid.

We have a statement regarding the supercritical fluid.

We have to fill in the blanks with correct alternatives.

A supercritical fluid is any substance at a temperature and pressure above its critical point, where distinct liquid and gas phases do not exist.

According to the question -

The complete statement regarding the supercritical fluid is as follows -

A supercritical fluid can expand like a gases to fill a container and has a density similar to that of a liquid so can behave as a solvent.

Hence, the correct alternatives of the blanks are -

Blank 1 - Gases.

Blank 2 - Liquid.

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Answer:

A. To increase surface area of a solute

Explanation:

Answer:

The temperature of the solution will decrease.

Explanation:

Less energy is released than is used, the molecules of the solution move more slowly, making the temperature decrease.

According to the concept of solubility, lowering of the freezing point  results when a solute dissolves in a solvent.

Solubility is defined as the ability of a substance which is basically solute to form a solution with another substance usually a solvent. There is an extent to which a substance is soluble in a particular solvent. This is generally measured as the concentration of a solute  which is present in a saturated solution.

The solubility mainly depends on the composition of solute and solvent ,its pH and presence of other dissolved substance. It is also dependent on parameters of  temperature and pressure which is maintained.Concept of solubility is not valid for chemical reactions which are irreversible. The dependency of solubility on various factors is due to interactions between the particles, molecule or ions.

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The correct answer is B. NaHCO3 (sodium bicarbonate) is soluble in water because NaHCO3 is an ionic compound with polar characteristics, allowing it to dissolve in the polar solvent water..

Water is a polar solvent, meaning it has a partial positive and negative charge due to the uneven distribution of electrons between the hydrogen and oxygen atoms. Hexane (C6H14), on the other hand, is a nonpolar solvent, meaning it lacks any significant charge separation.
Solubility of a solute is determined by the principle "like dissolves like," which means that polar solvents dissolve polar solutes, and nonpolar solvents dissolve nonpolar solutes.
The other options are incorrect because:
A. CaCl2 (calcium chloride) is soluble in water, not hexane, due to its polar nature as an ionic compound.
C. Octane (C8H18) is nonpolar and soluble in nonpolar solvents like hexane, not in polar solvents like water.
D. Mineral oil is nonpolar and soluble in nonpolar solvents, not in polar solvents like water.

Therefore, NaHCO3 (sodium bicarbonate) is soluble in water (Option b). This is because NaHCO3 is an ionic compound with polar characteristics, allowing it to dissolve in the polar solvent water.

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The complete word equation for the rusting of iron is; iron + oxygen + water → hydrated Iron III oxide.

The term rusting has to do with the process by which iron reacts with moisture in the presence of oxygen and forms a flaky substance that reduces the tensile strength of the iron. We know that the process of rusting is an example of an unwanted oxidation reaction and this is why the iron must be protected from rusting.

Thus, the reactants that we can find in the rusting of iron are iron metal, water and oxygen. This is a chemical change because the compound that is produced is quite different in terms of chemical composition from the reactants.

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The overall heat transfer coefficient, U, is the sum of the individual heat transfer coefficients on the inner and outer surfaces of the pipe. To find U, we need to calculate the individual heat transfer coefficients and then sum them.

First, let's calculate the individual heat transfer coefficient on the inner surface of the pipe. We can use the convective heat transfer coefficient formula:

h_inner = 5680 W/m^2 K

Next, let's calculate the individual heat transfer coefficient on the outer surface of the pipe. Again, we can use the convective heat transfer coefficient formula:

h_outer = 22.7 W/m^2 K

Now, let's find the overall heat transfer coefficient, U:

U = (1 / h_inner + 1 / h_outer)^-1

Substituting the values we have:

U = (1 / 5680 + 1 / 22.7)^-1

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The pH of 1 X 10-2 M HCN acid is 5.7

D) between 4 and 7

HCN is weak acid dissociate as

HCN  + H2O   \rightleftharpoons  H3O+  +  CN-

Ka = [CN- ][H3O+] / [HCN]

but  [CN- ] = [H3O+] = x

Ka = [x][x] / [HCN]

Substitute the value in equation

4.0X 10-10 = [x]2/ 1 X 10-2

[x]2 = 4.0X 10-10 X1 X 10-2  = 4.0 X 10-12

[x] = 2.0 X 10-6 M

Concentration of H3O+ = 2 X 10-6 M

pH = - log[H3O+]

pH = - log (2 X 10-6)

pH = 5.7

Prussic acid, also known as hydrogen cyanide, is a chemical substance with the formula HCN and the structural formula HCN. It is a colourless, incredibly poisonous, and flammable liquid that boils at 25.6 °C (78.1 °F), just slightly above room temperature.

Industrial-scale HCN production makes it a highly prized precursor to a wide range of chemical compounds, from pharmaceuticals to polymers. Production of potassium cyanide and adiponitrile, which are used in mining and plastics, respectively, has large-scale applications. Due to its volatile nature, it is more toxic than cyanide compounds that are solid.

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Explanation:

Avogadro's number. What can be said about 1 mol Ag and 1 mol Au? ... They contain the same number of atoms.

1 mole of Ag and 1 mole of Au contain the same number of particle. Therefore, option B is correct.

The International System of Units uses the mole (symbol: mol) as the unit of material quantity. How many elementary entities of a particular substance are present in an object or sample is determined by the quantity of that material. It is specified that the mole contains exactly 6.022140761023 elementary entities.

A mole is defined as the mass of a substance that has the same number of elementary particles as there are atoms in precisely 12.000 g of 12C.

In the periodic chart, group 11 includes the chemical elements roentgenium (Rg), copper (Cu), silver (Ag), and gold (Au). However, no chemical tests have yet been done to demonstrate that roentgenium behaves similarly to the heavier homologue of gold.

Thus, option B is correct.

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Answer:

The Ice is Less Dense than the Water

Explanation:

I just answered this one myself, and the explanation is also just that Ice isn't dense enough to sink.

Considering the two acids and bases involved, the reverse reaction is favored.

The term reversible reaction refers to a reaction that can go either forward or backwards depending on the conditions of the reaction.

We must recall that acetic acid is a weak acid hence the equilibrium position would always lie towards the left hand side of the equation. Hence considering the two acids and bases involved, the reverse reaction is favored.

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Answer:

9.90

Explanation:

Given [H+] = 1.25 x 10^-10 M, we can calculate the pH using the formula:

pH = -log10([H+])

pH = -log10(1.25 x 10^-10)

Using logarithmic properties:

pH = -log10(1.25) - log10(10^-10)

Since log10(10^-10) is equal to -10:

pH = -log10(1.25) - (-10)

pH = -log10(1.25) + 10

Now, evaluating the logarithm using a calculator:

pH = -0.0969 + 10

pH = 9.9031

Therefore, the pH of the solution with [H+] = 1.25 x 10^-10 M is approximately 9.9031. Rounding it to two decimal places, the pH is approximately 9.90.

Explanations:

(i) Moles for K

mass = 89.3% = 89.3g

Mol. mass K =39.0983g/mol

∴ n = mass/molmass

=89.3/39.0988

=2.28 moles

(ii) Moles for N

mass = 10.7% = 10.7 g

Mol. mass N =14.0067g/mol

∴ n = mass/molmass

=10.7g/ 14.0067g/mol

=0.76 moles

• K= 2.28 /0.76 = 2.9898240669737 ≈ 3

• N=0.76/0.76 = 1

Explanation:

hope the picture above helps u to understand:)

Answer:

temperature

Explanation:

Water has a higher surface tension than most liquids because of hydrogen  bonds its molecules form.

Water has a higher surface tension than other liquids due to the relatively high molecular or strong cohesive interactions that occur between its molecules. Hydrogen bonds also make it possible for water molecules to strongly adhere to one another and resist stretching.

The formed links are known as hydrogen bonds, and they cause the water molecules to stick together tightly and have a high surface tension.

A robust and flexible lattice of water molecules is created when several water molecules form hydrogen bonds with one another. High surface tension results from this. Water striders may move across the water's surface thanks to surface tension.

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Combustion of coke is harmful as it increases the concentration of CO2 in the atmosphere which causes global warming due to the greenhouse effect.

CO2 is not deemed a pollution until a particular threshold is reached. Rather, it aids in maintaining the temperature of the Earth. Coke combustion is hazardous because it raises the concentration of CO2 in the atmosphere, causing global warming owing to the greenhouse effect.

Burning of coke creates a lot more than simply CO2. There are a plethora of harmful and polluting byproducts. Phenolic and other organic compounds, as well as cyanides, sulphides, and ammonia, are a few examples.

Burning of coke creates a lot more than simply CO2. There are a plethora of harmful and polluting byproducts. Phenolic and other organic compounds, as well as cyanides, sulphides, and ammonia, are a few examples. You may be confused coke combustion with carbon combustion, which produces CO2 and no other hazardous byproducts.

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Answer:

one of the atoms sharing electrons is more electronegative than the other atom

Explanation:

A covalent bond is likely to be polar when one of the atoms sharing electrons is more electronegative than the other atom. Therefore, option (A) is correct.

A covalent bond can be described as a chemical link formed by the exchange of electron sets between particles. A covalent bond can be formed by equal sharing of electrons from both contributing atoms.

The pair of electrons in this type of bonding is known as shared pair or bonding pair. Covalent bonds are the sharing of bonding pairs that will ensure that the atoms gain stability in their outer shell.

Elements with very high ionization energies are incapable of transferring electrons and elements having low electron affinity cannot accept electrons. Covalent bonding takes place between two non-metallic atoms characterized by the equal sharing of electron pairs between the atoms and other covalent bonds with an electronegativity difference is more than 2.0.

Therefore, the covalent bond can be polar if one atom is more electronegative than the other atom.

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