What is volume? a. How close particles are stuck together b. The amount of space occupied by matter c. The amount of particles in any given object d. The weight of an object Please select the best answer from the choices provided

Answer:

SbCl5

Antimony pentachloride

Antimony pentachloride is a chemical compound with the formula SbCl5.

- wikipedia

a) To determine the number of grams of I2 needed to react with 36.7 g of N2H4, we need to use stoichiometry.

The balanced equation for the reaction is:

2I2 + N2H4 → 4HI + N2

From the equation, we can see that 2 moles of I2 react with 1 mole of N2H4 to produce 4 moles of HI. So, the mole ratio of I2 to N2H4 is 2:1.

First, we need to determine the number of moles of N2H4 in 36.7 g:

moles of N2H4 = mass / molar mass

moles of N2H4 = 36.7 g / 32.045 g/mol

moles of N2H4 = 1.146 mol

Since the mole ratio of I2 to N2H4 is 2:1, we need half as many moles of I2 as there are moles of N2H4:

moles of I2 = 1.146 mol / 2

moles of I2 = 0.573 mol

Finally, we can calculate the number of grams of I2 needed:

mass of I2 = moles of I2 x molar mass of I2

mass of I2 = 0.573 mol x 253.81 g/mol

mass of I2 = 145.5 g

Therefore, 145.5 grams of I2 are needed to react with 36.7 grams of N2H4.

b) To determine the number of grams of HI produced from the reaction of 115.7 g of N2H4 with excess iodine, we need to use stoichiometry again.

The balanced equation for the reaction is:

2I2 + N2H4 → 4HI + N2

From the equation, we can see that 2 moles of I2 react with 1 mole of N2H4 to produce 4 moles of HI. So, the mole ratio of HI to N2H4 is 4:1.

First, we need to determine the number of moles of N2H4 in 115.7 g:

moles of N2H4 = mass / molar mass

moles of N2H4 = 115.7 g / 32.045 g/mol

moles of N2H4 = 3.609 mol

Since the mole ratio of HI to N2H4 is 4:1, we can calculate the number of moles of HI produced:

moles of HI = 4 x moles of N2H4

moles of HI = 4 x 3.609 mol

moles of HI = 14.436 mol

Finally, we can calculate the number of grams of HI produced:

mass of HI = moles of HI x molar mass of HI

mass of HI = 14.436 mol x 127.91 g/mol

mass of HI = 1846.5 g

Therefore, 1846.5 grams of HI are produced from the reaction of 115.7 grams of N2H4 with excess iodine.

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Answer:

C₂H6

Explanation:

Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). Option A

A hydrocarbon is a compound that consists of only carbon and hydrogen atoms. It is important to identify the formula that represents a hydrocarbon among the given options:

A) C₂H6: This formula represents ethane, which is a hydrocarbon. Ethane consists of two carbon atoms bonded together with single bonds and six hydrogen atoms.

B) C₂H5OH: This formula represents ethanol, which is not a hydrocarbon. Ethanol contains a hydroxyl group (-OH), indicating the presence of oxygen in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.

C) C₂H5Cl: This formula represents ethyl chloride, which is not a hydrocarbon. Ethyl chloride contains a chlorine atom (Cl) in addition to carbon and hydrogen atoms. It is a haloalkane, not a hydrocarbon.

D) C₂H6O: This formula represents ethanol, which, as mentioned before, is not a hydrocarbon. Ethanol contains an oxygen atom (O) in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.

Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). It consists only of carbon and hydrogen atoms, making it a suitable representation of a hydrocarbon.

In summary, the formula C₂H6 (option A) represents a hydrocarbon, while the other options contain additional elements (oxygen or chlorine) that make them non-hydrocarbon compounds. Option A

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Yes, it is possible to use the same colored central atom to make a model for all of these molecules. This is because the central atom in all of these molecules is the same, so it does not matter what color it is. The other atoms attached to the central atom will determine the shape of the molecule.

All the molecules have the same central atom because they are all hydrocarbons with the general formula CnH2n+2. The only difference between them is the number of carbon atoms that are present.For example, methane (CH4), ethane (C2H6), propane (C3H8), and butane (C4H10) are all hydrocarbons, and they all have Carbon as their central atom. The number of hydrogen atoms in each molecule varies based on the number of carbon atoms present.For instance, Methane (CH4) has one carbon atom and four hydrogen atoms, Ethane (C2H6) has two carbon atoms and six hydrogen atoms, Propane (C3H8) has three carbon atoms and eight hydrogen atoms, and Butane (C4H10) has four carbon atoms and ten hydrogen atoms. Therefore, you can use the same central atom, Carbon (C), to create a model for all of these molecules.

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A base is a type of chemical compound that is characterized by the fact that it has a slippery, soapy feel when touched. The correct option is (a).

The slippery, soapy feel is one of the most distinguishing characteristics of a base, and it is due to the fact that bases are able to react with fats and oils on the skin, creating soap-like substances that feel slippery and greasy to the touch.

Bases are also known for their ability to turn red litmus to blue, which is another common characteristic. This is due to the fact that bases are capable of producing hydroxide ions (\(OH^{-}\)) when they are dissolved in water.

These hydroxide ions are basic in nature, and they are able to neutralize any acidic substances that they come into contact with. As a result, when blue litmus paper treated with an acidic substance will turn red when it comes into contact with a base.

Acidic substances, on the other hand, produce \(H^{+}\) ions when they are dissolved in water. These ions are able to neutralize any basic substances that they come into contact with, and as a result, they will turn litmus paper red.

Overall, bases are a very important class of chemical compounds that are used in a wide range of industrial, scientific, and medical applications.

The complete question is,

which one of the following is characteristic of a base? explain in 200 words.

a. has a slippery, soapy feel

b. produces \(H_{3}O\) in water

c. is insoluble in water

d. has a sour taste turns blue litmus red

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The molar solubility of AgCl in a solution that has [Cl−] = 2.0 × 10^−2M is 9.0 × 10^−9 M.

The solubility product constant, Ksp, for AgCl is given as 1.8 × 10^−10 at a certain temperature. The expression for Ksp is:

Ksp = [Ag+][Cl−]

where [Ag+] is the concentration of Ag+ ions in the solution, and [Cl−] is the concentration of Cl− ions in the solution.

For AgCl, the dissociation reaction is:

AgCl(s) ⇌ Ag+(aq) + Cl−(aq)

Let the molar solubility of AgCl be S. Then, at equilibrium, the concentrations of Ag+ and Cl− ions in the solution will be S and 2.0 × 10^−2 M, respectively.

So, the equilibrium expression for Ksp is:

Ksp = [Ag+][Cl−] = S × 2.0 × 10^−2

Substituting the given values, we get:

1.8 × 10^−10 = S × 2.0 × 10^−2

S = (1.8 × 10^−10) / (2.0 × 10^−2) = 9.0 × 10^−9 M

Therefore, the molar solubility of AgCl in a solution that has [Cl−] = 2.0 × 10^−2M is 9.0 × 10^−9 M.

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Answer:

battery, phone cover, model of phone, plastic cover phone by rain oil or some harmful effects , need wire Stricker to make phone good so the people buy it and some inner parts

Explanation:

Hope this helps:)

The possible fuels that can be used are, LPG (Liquefied petroleum gas), CNG (Compressed Natural Gas), Biogas, and fossil fuels.

An ideal fuel has the following characteristics:

Thus, LPG (Liquefied petroleum gas), CNG (Compressed Natural Gas), Biogas, and fossil fuels are ideal fuels and can be used in the eco-friendly reactor.

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It is possible to perform laboratory analysis to measure the concentration of Nitrite (as N) of a water sample that was field preserved with sulfuric acid. This statement is true.

When water samples are collected for analysis of nitrite (as N) concentration, it is crucial to prevent any changes in the nitrite levels during transportation and storage. Nitrite can undergo chemical reactions or microbial transformations, leading to inaccurate results if not properly preserved.

Sulfuric acid is commonly used as a preservative for nitrite analysis. It helps maintain the stability of nitrite in the water sample by lowering the pH and inhibiting the activity of microbial agents that can convert nitrite to other nitrogen species, such as nitrate or nitrogen gas.

In the laboratory, the preserved water sample can be analyzed using various methods to determine the concentration of nitrite (as N). Common techniques include colorimetric assays, spectrophotometry, or ion chromatography. These methods rely on specific chemical reactions or detection principles to quantify the nitrite concentration accurately.

Hence, by field preserving a water sample with sulfuric acid, the concentration of nitrite (as N) can be effectively measured in the laboratory using appropriate analytical techniques.

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Answer:

8,95

Explanation:

Density is equal to mass/volume

\(D=\frac{m}{v} \\D= \frac{1668g}{186.2} \\D = \frac{8,95g}{cm^3} \\\)

approximately

Curiosity:

Did you knew that is because of his low density that ships can fluctuate?

Despite their big mass, their volume are far greatter, so the Buoyancy Force acts heavily on them.

If one of the waste products of cellular respiration is CO2 by means of exhaling, then the rate of cellular respiration increased.

This consists of series of reactions which combine the chemical energy from foodstuffs and oxygen to form ATP and other waste products such as carbon dioxide and water.

During this process, the carbon dioxide is transported from the mitochondria out of the cell, to the red blood cells, and to the lungs where they are exhaled.

This therefore depicts that the cellular respiration increased as a result of the carbon dioxide given off via exhalation and thereby makes it the correct choice.

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Boyle's Law states that at constant temperature the volume of a given mass of a dry gas is inversely proportional to its pressure.

Most gases behave like ideal gases at moderate pressures and temperatures.

We use this:

T doesn't change.

Condition 1:

P1 = 17 psi

V1 = 6.563 L

Condition 2:

P2= We need to find this

V2 = 1 L

-----------------------------------------------------------------------------------------

From Boyle's Law we clear P2:

P2 = (17 psi x 6.563 L) / 1 L = 111 psi

Answer: P2 = 111 psi (condition 2)

Answer:

Ik Gymnosperms

Explanation:

term that means naked seeds

Answer:

gymnosperm and angiosperm

Explanation:

The liquidus line separates the following combinations of phase fields: Liquid and Liquid + alpha. The correct option is b.

What is a phase field? A phase field is a technique for representing the microstructure of materials. It is used in materials science, mathematics, and computer science to simulate and study the behavior of materials in the solid and liquid phases. It is a multi-component field that contains information on the concentration of various components, their phase, and the local temperature, as well as other relevant variables.

The liquidus line is defined as the boundary between the liquid phase field and the field that includes both the liquid and the alpha phase. As a result, the liquidus line separates the following combinations of phase fields: Liquid and Liquid + alpha.

So, the correct option is b) Liquid and Liquid + alpha.

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Answer:

C

Explanation:

Solutions are mixtures that are homogeneous while suspensions are mixtures that are heterogeneous.

The atmospheric pressure in the lab in atm is 1 atm.

Given atmospheric pressure in mm Hg is 760.

We need to convert this pressure from mm Hg to atm.

Atmospheric pressure can be measured in different units like mmHg, atm, Pa, and torr.

Here, we are going to convert the pressure from mmHg to atm using the following conversion factor.

1 atm = 760 mmHg

To convert from mmHg to atm, we divide the value in mmHg by 760.

760 mmHg = 760/760 atm = 1 atm

Therefore, the atmospheric pressure in atm is 1 atm.

We can also use the conversion factor to convert the pressure from mmHg to atm as follows:

760 mmHg x (1 atm/760 mmHg) = 1 atm

Hence, the atmospheric pressure found in the lab in atm is 1 atm.

The given conversion has been executed below.

760 mmHg × (1 atm / 760 mmHg) = 1 atm

Therefore, the atmospheric pressure in the lab in atm is 1 atm.

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Answer:

to prevent rust the man should oil his get or use lubricants to lubricate it

The products formed in the Brønsted-Lowry reaction HSO⁻⁴+ NO⁻² ⇆ acid + base are Acid: HSO⁻⁴ Base: NO⁻².

The Brønsted-Lowry theory defines an acid as a substance that donates a proton (H⁺) and a base as a substance that accepts a proton (H⁺). Here, in the reaction, HSO⁻⁴ acts as an acid and donates a proton to NO⁻² which acts as a base and accepts a proton. The reaction is HSO⁻⁴ + NO⁻² → SO₂⁻⁴ + HNO₂.

The product formed when HSO⁻⁴ donates its proton is SO₂⁻⁴ (sulfate ion) and the product formed when NO⁻² accepts the proton is HNO₂ (nitrous acid). Thus, the acid in the reaction is HSO⁻⁴ and the base in the reaction is NO⁻².

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The enthalapy is the heat content of a system at constant pressure. Therefore option G is correct.

Enthalpy is a thermodynamic property that represents the heat content of a system at constant pressure. The symbol for enthalpy is H, and it is expressed in units of Joules (J) or calories (cal). It is defined as the sum of the internal energy (U) of a system and the product of pressure (P) and volume (V) of the system:

H = U + PV

Enthalpy can be used to measure the heat absorbed or released during a chemical reaction, as well as the heat absorbed or released during a phase change or any other process that occurs at constant pressure. Therefore, the heat content of a system at constant pressure is known as enthalapy.

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The correct question is :

What is enthalpy?

a) The heat absorbed or released during a phase change.

b) The heat absorbed or released during a phase change.

c) The heat absorbed during an endothermic reaction.

d) The heat absorbed during an endothermic reaction.

e) The heat given off during an exothermic reaction.

f) The heat given off during an exothermic reaction.

g) The heat content of a system at constant pressure.

Dextrose monohydrate found in parenteral nutrition provides (b) twice as many calories per gram as pure glucose.

Dextrose monohydrate is a form of glucose that contains one molecule of water, while pure glucose does not have any water molecules associated with it. The presence of water in dextrose monohydrate increases its molecular weight, resulting in a higher caloric content compared to pure glucose.

This is because the energy content of a substance is typically measured per gram, and the additional water molecules in dextrose monohydrate contribute to its overall weight without providing any additional energy.

Therefore, when using dextrose monohydrate in parenteral nutrition, a smaller quantity is required to provide the same number of calories as pure glucose.

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Answer:

No they do not have a lot of kinetic energy

The density of liquid 1 is greater than the density of liquid 2. Because the liquids do not mix and liquid 1 rests on top of liquid 2 in the U-tube, the denser liquid will be at the bottom and the less dense liquid will be at the top. This is due to the principle of buoyancy, which states that an object will float or sink in a fluid depending on its density relative to the fluid.

I believe the density p1 is greater than the density p2.

Since the liquid is at equilibrium in the open U-tube, the pressure at which the liquids meet should be the same. That is at the position where they are in contact, the pressure that liquid 1 exerts at that point is the same as the pressure exerted by liquid 2 at the point.

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Answer: i think its the 3 one

Explanation: hope this helps :)

Answer:

The fourth option

Explanation:

So if you got the periodic table, you can search for boron and get it's Molar Mass: B=10.811u

We know the given mass and we know that there's only 1 mol of boron given, we can calculate it by the given: \(88.0g *\frac{1 mol}{10.811g} = 8.14mol\)

We use avogadro's number (6.022×10²²), plug in our new value to get the # atoms: \(8.14 *\frac{6.022*10^2^2}{1 mol} = 4.90*10^2^2\) (Multiply 8.14 by Avogadro's number to get the atom number)

so the atom number for 88g of Boron would be : 4.90×10²² atoms of B

Answer:

1) faster

2) slower

Explanation:

Answer:

faster

Explanation:

A non-reducing disaccharide is formed when a glycosidic bond occurs between two monosaccharides, both of which are in the ketose form. Specifically, a glycosidic bond between two ketose monosaccharides in the α-anomeric form would yield a non-reducing disaccharide.

In the α-anomeric form of a ketose, the anomeric carbon (the carbon involved in the glycosidic bond formation) is in the α configuration. The α configuration means that the hydroxyl group attached to the anomeric carbon is pointing downward. When two α-ketose monosaccharides are linked together through a glycosidic bond, the resulting disaccharide is non-reducing because the anomeric carbon of both monosaccharides is involved in the glycosidic bond and cannot undergo mutarotation.

In contrast, if the glycosidic bond occurs between a ketose and an aldose (such as a ketose and a glucose), or between a ketose and the reducing end of another carbohydrate molecule, the resulting disaccharide would be a reducing disaccharide because the anomeric carbon of the reducing monosaccharide can still undergo mutarotation and reduce other compounds.

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The correct statement is: "the concentrations of PCl5(g), PCl3(g), and Cl2(g) are constant."

The equation given represents a chemical reaction at equilibrium, and the equilibrium constant expression for the reaction is:

Kc = [PCl3] * [Cl2] / [PCl5]

The equilibrium constant (Kc) is a constant value for a given reaction at a specific temperature, and it describes the ratio of the concentrations of the products to the concentrations of the reactants at equilibrium.

Based on the equation and the equilibrium constant expression, we can make the following conclusions:

a) If the concentration of PCl5(g) is increasing, it means that the reaction is proceeding in the forward direction, and the equilibrium constant would no longer be valid. Therefore, this statement is incorrect.

b) If the concentration of PCl5(g) is decreasing, it means that the reaction is proceeding in the reverse direction, and the concentration of the products (PCl3(g) and Cl2(g)) would increase. However, the equilibrium constant remains constant as long as the temperature remains constant. Therefore, this statement is also incorrect.

c) The equation shows that one mole of PCl5 reacts to form one mole of PCl3 and one mole of Cl2. Therefore, at equilibrium, the concentrations of PCl5(g) and PCl3(g) would not be equal since they are present in different ratios. This statement is also incorrect.

d) At equilibrium, the concentrations of all the species (PCl5(g), PCl3(g), and Cl2(g)) would be constant, as long as the temperature remains constant. This is because the reaction rate in both the forward and reverse directions becomes equal, and there is no further net change in the concentrations of the reactants and products.

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If the universe is expanding, why should it have been a point? The expanding universe, on the other hand, does not imply that the universe was once a point. The universe did not begin as a tiny speck that exploded into existence during the Big Bang.

That explanation is just a popular and incorrect portrayal of the event.The Big Bang is, in fact, a process in which the universe expands and cools over time. It's a process that takes place over time. In the very first instants of the Big Bang, the universe was hot and dense, but not a point. In fact, physicists believe that in the very early universe, the universe underwent a rapid process of expansion, known as inflation, which caused it to expand at a rate much faster than the speed of light. This expansion took place over a period of time, causing the universe to cool and expand, forming the stars and galaxies we see today.

:It is often believed that the universe began as a tiny speck that exploded during the Big Bang. This is, in fact, a misinterpretation of the event. The Big Bang is a process in which the universe expands and cools over time. Inflation, a period of rapid expansion that occurred in the early universe, is thought to have caused the universe to expand much faster than the speed of light. The universe cooled and expanded over time, forming the stars and galaxies we see today. Scientists' current understanding of the universe is that it has been continuously expanding since the Big Bang, and that this expansion is accelerating, driven by a mysterious force called dark energy.

In conclusion, the expanding universe does not suggest that it was once a point; rather, it implies that the universe has been expanding and cooling since the Big Bang, forming the stars and galaxies we see today.

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Propanal is a structural isomer of acetone.

Both acetone and propanal have the same molecular formula, which is C3H6O. However, the arrangement of atoms is different in these two compounds, which makes them structural isomers of each other. Specifically, acetone is a ketone, while propanal is an aldehyde.A ketone is a type of organic compound that has a carbonyl group, which is a carbon atom double-bonded to an oxygen atom, in the middle of the carbon chain. On the other hand, an aldehyde has a carbonyl group at the end of a carbon chain. In propanal, the carbonyl group is attached to the carbon at the end of the chain, while in acetone it is attached to the carbon in the middle of the chain.

In summary, propanal is a structural isomer of acetone, meaning they have the same molecular formula but different arrangement of atoms. Propanal is an aldehyde, while acetone is a ketone.

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Explanation:

The answer to the question is (3) K2SO4