What are the initial mole of C2H2 from a ample of 1. 00L at temperature 373. 15K and preure of 1. 00atm

Answer:

When we dissolve sugar into water, the particles of sugar occupy the spaces between the molecules of water and eventually all the sugar disappears.

Explanation:

Answer:

you can see tiny bits of sugar become wet

Explanation:

then, you can see particles of sugar expand everywhere.

When borax is dissolved in water, I predict that the standard entropy of the system will increase. This is because entropy generally increases when solids are dissolved, as the particles become more disordered and have more freedom of movement.

Therefore, the movement and disorder of the system will increase, resulting in an increase in entropy. As for the sign of ΔSsys, it will also be positive, indicating an increase in entropy.
When borax is dissolved in water, the standard entropy of the system is expected to increase. This increase occurs because entropy generally rises when solids are dissolved. The solid particles disperse into the solvent, creating a more random, disordered state. As a result, the sign of ΔSsys will be positive, indicating an increase in entropy.

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The boiling point of diethyl ether at a pressure of 1.3 atm would be higher than its normal boiling point of 34.6°C.


The boiling point of a liquid depends on its vapor pressure and the external pressure applied to it. When the external pressure is decreased, the vapor pressure of the liquid becomes equal to the external pressure at a lower temperature, resulting in a lower boiling point. On the other hand, when the external pressure is increased, the vapor pressure of the liquid needs to reach a higher value to overcome the external pressure, resulting in a higher boiling point.

In this case, the external pressure of diethyl ether is 1.3 atm, which is higher than atmospheric pressure (1 atm) at which the normal boiling point is measured. Therefore, the boiling point of diethyl ether would be higher than 34.6°C when it is subjected to a pressure of 1.3 atm.

The boiling point of diethyl ether would be higher than 34.6°C at a pressure of 1.3 atm.

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The weak bond between the hydrogen atom of one molecule and the nitrogen atom of another molecule, where the two don't actively share an electron, is called hydrogen bond. Option A is correct.

A hydrogen bond is a type of intermolecular attraction that occurs when a hydrogen atom, already covalently bonded to one electronegative atom, interacts with another electronegative atom.

In this case, the hydrogen is bonded to a highly electronegative nitrogen atom, creating a partially positive charge on the hydrogen and a partially negative charge on the nitrogen, allowing for electrostatic attraction between the two molecules.

Hydrogen bonds are relatively weak compared to covalent bonds, but they play a critical role in many biological and chemical processes. For example, hydrogen bonds help hold together the two strands of DNA, which is critical for the proper functioning of genetic information.

Hence, A. is the correct option.

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--The given question is incomplete, the complete question is

"What is the type of weak bond between the hydrogen of one molecule and the nitrogen of another molecule, where the two don't actively share an electron? group of answer choices A) hydrogen bond B) ionic bond C) disulfide bond D) hydrophobic bond E) covalent bond."--

Answer:

He source of starting materials for synthetic polymers is primarily petroleum and natural gas.

Explanation:

The primary source of starting materials for synthetic polymers is petroleum and natural gas. These fossil fuels contain hydrocarbon molecules that serve as the building blocks for the production of various synthetic polymers. The process involves extracting and refining crude oil and natural gas to obtain the desired hydrocarbon compounds, which are then used as feedstocks in polymer synthesis.

Petroleum-based starting materials, such as ethylene and propylene, are extensively used in the production of polymers like polyethylene and polypropylene, respectively. These polymers have a wide range of applications, including packaging materials, plastic bags, bottles, and various other plastic products.

While plants can be a source of some natural polymers, such as cellulose or starch, which are used in applications like paper, textiles, and biodegradable packaging, they are not the primary source for the production of synthetic polymers. Synthetic polymers, which account for a significant portion of the plastics and synthetic materials used in modern society, are primarily derived from petroleum and natural gas feedstocks.

Recycled plastics (option C) can be used as a secondary source of materials for polymer production. By recycling and processing used plastic products, the plastic can be reprocessed and used as a feedstock in the production of new polymers. However, recycled plastics currently make up a relatively smaller proportion of the overall raw materials used for synthetic polymers.

Animals (option D) are not a significant source of starting materials for synthetic polymers. While certain natural polymers, such as collagen or keratin, are derived from animal sources, they are not commonly used as feedstocks for the production of synthetic polymers on a large scale.

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A spontaneous reaction is one in which the change in free energy is negative and the standard cell potential is positive.

For a redox reaction to be spontaneous, the electrode potential of the cell must be positive and this depends on the relative electrode potentials of the species involved in the reaction. A metal can not displace a metal above it in the electrochemical series from solution.

Based on this;

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Answer:

To calculate an electron configuration, divide the periodic table into sections to represent the atomic orbitals, the regions where electrons are contained. Groups one and two are the s-block, three through 12 represent the d-block, 13 to 18 are the p-block and the two rows at the bottom are the f-block.Explanation:

Equimolar amounts of F2 and O2 are placed in a previously evacuated rigid container, the element that is reduced is oxygen (O2).

The balanced chemical equation for the reaction of F2 and O2 is as follows: F2 + O2 → 2F. Oxygen is the oxidizing agent in this reaction, whereas fluorine is the reducing agent. As a result, oxygen will be reduced, and fluorine will be oxidized. Oxygen gains electrons in this reaction, which means it has undergone reduction. Oxygen has a lower electronegativity than fluorine, which means it is less likely to take electrons from other atoms.

Fluorine has a higher electronegativity than oxygen, which means it is more likely to take electrons from other atoms.The reduction potential of oxygen is lower than that of fluorine, indicating that it is less likely to gain electrons than fluorine. As a result, when oxygen reacts with fluorine, it gains electrons and is reduced.

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The correct name for p3o2 is B. Phosphorus pentoxide.

Phosphorus pentoxide (P32O2) is a chemical compound composed of phosphorus and oxygen.

It is a white, crystalline solid that is highly reactive and forms acidic solutions when dissolved in water.

This compound is used in a variety of applications, including as a dehydrating agent, a desiccant, and as a raw material for the production of phosphoric acid and other phosphorus compounds.

In general, Phosphorus pentoxide is a strong oxidizing agent, and it reacts with many organic and inorganic compounds to form new compounds.

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Answer:

1) 40

2) 2.25 moles

3) 17

4) 120

5) Fe₂O₃

Explanation:

Please see attached picture for full solution.

Answer:

1) \(\boxed{Molar \ mass = 40\ g/mol}\)

2) \(\boxed{No.\ of\ Moles = 1.61 \ moles}\)

3) \(\boxed{Ammonia = 16\ g/mol}\)

4) \(\boxed{Sodium\ Hydrogen\ Sulphate= 120 \ g/mol}\)

5) \(\boxed{Fe_{2}O_{3}}\)

Explanation:

Question # 1:

Using Formula, No. of moles = Mass in grams / molar mass

Where moles = 0.375 mol. , mass = 15 g

=> Molar Mass = Mass in grams / No. of moles

=> Molar Mass = 15 / 0.375

=> Molar mass = 40 g/mol

Question # 2:

No. of moles = Mass in grams / Molar mass

Where Mass = 90 g ,

=> Molar Mass = \(MgO_{2}\)

=> MM = 24 + (16*2)

=> MM = 24 + 32

=> MM = 56 g/mol

No. of Moles = 90 / 56

No. of Moles = 1.61 moles

Question # 3:

Ammonia => \(NH_{3}\)

N has atomic mass 14 ang H has atomic mass 1

Ammonia = (14)+(1*2)

Ammonia = 14+2

Ammonia = 16 g/mol

Question # 4:

Sodium Hydrogen Sulphate => \(NaHSO_{4}\)

Where Na has atomic mass 23, H has atomic mass 1 , sulpher 32 and oxygen 16

\(NaHSO_{4}\) = 23+1+32+(16*4)

=> 56+64

=> 120 g/mol

Question # 5:

The metal which has relative atomic mass of 56 is Iron (Fe)

Given that the oxide contains 70.0 % of Metal

Mass of \(MO_{x}\) (Metal oxide) = 56 / 70 * 100

Mass of \(MO_{x}\) (Metal oxide)  = 0.8 * 100

Mass of \(MO_{x}\) (Metal oxide)  = 80

Mass of x O's = 80 - 56

Mass of x O's = 24

Now, Mass of O = 24 / 16

Mass of O = 1.5

So, Fe Metal and its oxide are in the ratio of

1 : 1.5

×2   ×2

2 : 3

So, the empirical formula of metal with its oxide is \(Fe_{2}O_{3}\)

Soluble water contaminants, such as Calcium chloride, calcium sulphate, calcium bicarbonate, magnesium chloride, magnesium sulphate, magnesium bicarbonate, sodium chloride, sodium sulphate, sodium carbonate, and organic matter.

The more prevalent soluble contaminants are sugar, salt, and milk, are impurities that dissolve in water.

Organic substances typically dissolve easily in solvents with attributes comparable to their own. Like dissolves like, also known as the "like dissolves like" principle, states that non-polar molecules will typically dissolve in non-polar solvents and polar molecules will typically dissolve effectively in polar solvents.

Organic solvents are chemicals with a carbon structure that can dissolve or disperse one or more other compounds.

Organic solvents have the potential to be neurotoxins, genital poisons, and carcinogens.

The organic solvents benzene, carbon tetrachloride, and trichloroethylene are carcinogenic.

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The answer is 155 pm, hope this helps!

Answer:

b

Explanation:

Answer:

The correct answer is C. "The West Indies gave the colonies the chance to trade with other countries."

Explanation:

The thirteen American colonies wanted to purchase goods from the West Indies because the West Indies gave the colonies the chance to trade with other countries. Option C is correct.

The thirteen colonies were: Delaware, Pennsylvania, New Jersey, Georgia, Connecticut, Massachusetts Bay, Maryland, South Carolina, New Hampshire, Virginia, New York, North Carolina, and Rhode Island and Providence Plantations.

The Thirteen Colonies, also called the Thirteen American Colonies were a group of British colonies on the Atlantic coast of North America founded in the 17th and 18th centuries.

I hope this helps!!

Answer:

metaphase

Explanation:

because metaphase is the answer

Answer: Yes, the image shows that mass is being conserved.

1. The molar mass of the unknown gas obtained is 0.096 g/mol

2. The pressure of the oxygen gas in the tank is 1.524 atm

This states that the rate of diffusion of a gas is inversely proportional to the square root of the molar mass i.e

R ∝ 1/ √M

R₁/R₂ = √(M₂/M₁)

R₁/R₂ = √(M₂/M₁)

11.1 / 2.42 = √(2.02 / M₁)

Square both side

(11.1 / 2.42)² = 2.02 / M₁

Cross multiply

(11.1 / 2.42)² × M₁ = 2.02

Divide both side by (11.1 / 2.42)²

M₁ = 2.02 / (11.1 / 2.42)²

M₁ = 0.096 g/mol

From the question given above, the following data were obtained:

The pressure of the gas can be obtained by using the ideal gas equation as illustrated below:

PV = nRT

Divide both side by V

P = nRT / V

P = (27.65625 × 0.0821 × 294) / 438

P = 1.524 atm

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folic Acid

Folic acid, often known as folate, is a water-soluble B vitamin that is necessary for the generation of healthy red blood cells and the regular functioning of the brain system. Folate is present in numerous foods, including leafy green vegetables, legumes, nuts, and grains. Numerous processed goods, including breakfast cereals, breads, and rice, contain it as well. Folic acid is essential for pregnant women because it prevents birth abnormalities. It is also crucial for people of all ages since it helps maintain the health and normal operation of the body's cells. Folic acid is also essential for the production and repair of DNA, as well as the breakdown of specific proteins. Without appropriate folic acid, the body cannot produce red blood cells effectively, which can result in anemia. It is essential to consume adequate amounts of folic acid through diet or supplementation.

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the answer is A. SnCl2 . 2H2O

Answer:

4.5g

Explanation:

Given parameters:

  Mass of copper(i)chloride  = 6.93g

Unknown:

Mass of copper  = ?

Solution:

Formula of the compound  = CuCl

        atomic mass of Cu = 63.6g/mol,  atomic mass of Cl  = 35.5g/mol

  Molecular mass = 63.6 + 35.5  = 99.1g/mol

 So,

   The mass of copper = \(\frac{63.6}{99.1}\) x 6.93 = 4.5g

In the ELISA technique, the purpose of the substrate is to produce a measurable signal (usually a color change) that indicates the presence or absence of the target molecule (such as a specific antigen or antibody) in the sample being tested.

The substrate reacts with an enzyme that is conjugated to a detection antibody, which binds to the target molecule. This enzyme catalyzes a reaction that produces the signal, which can be quantified using a spectrophotometer or other detection method.
In the ELISA technique, the purpose of the substrate is to react with the enzyme-linked antibody, producing a detectable signal that indicates the presence of the target antigen in the sample. This signal is usually a color change, allowing for a visual or spectrophotometric measurement of the antigen concentration.

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Answer:

eon,era, period

Explanation:

Answer:

period<era<eon

Explanation:

I took the test, sadly got a 70%.

By multiplying the theoretical yield, or the amount that the process should theoretically produce, by 100.

Resistance or resistance to a force, impact, or movement is a reactionary act, process, or occurrence. especially: a reaction to the a particular treatment, condition, or stimulus; inclination toward a past but typically antiquated political or social system or policy.

One or more chemicals, also referred to as reactants, are transformed into one or more other substances, often referred to as products, in a chemical reaction. Substances are built up of active compounds or chemical elements. Burning is one of the five basic types of chemical reactions, along with combining, breakdown, only one, double-replacement, and replacement.

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Answer:

Explanation:

A. Tabular form of the formation of the compound formed between X and Y (carbon and oxygen):

| Element | Electronic Configuration |

|---------|-------------------------|

| X       | 1s² 2s² 2p⁶ 3s²        |

| Y       | 1s² 2s² 2p⁶ 3s² 3p⁵   |

B. Formation of the compound:

The compound formed between X and Y is carbon dioxide (CO2). Carbon (X) has an electronic configuration of 1s² 2s² 2p⁶ 3s², and oxygen (Y) has an electronic configuration of 1s² 2s² 2p⁶ 3s² 3p⁵.

Carbon has 4 valence electrons in its outermost energy level, while oxygen has 6 valence electrons in its outermost energy level. In order to achieve stability, carbon needs to gain 4 electrons, while oxygen needs to gain 2 electrons.

To form the compound CO2, carbon will share electrons with two oxygen atoms. Carbon will share 2 electrons with each oxygen atom, resulting in a double bond between carbon and each oxygen atom.

The formation of the compound can be represented as follows:

O = C = O

2. Drawing the formation of the compound:

In text format, the formation of the compound CO2 can be represented as:

     O

    //

   C

    \\

     O

Here, the central carbon atom (C) is bonded to two oxygen atoms (O) through double bonds. The structure of carbon dioxide is linear, with the carbon atom in the center and the oxygen atoms on either side.

The most helpful feature of the radioisotope americium-241 for the smoke detector to work is its Long half-life.

What is Half-Life?

Half-life is the time required for a quantity to reduce by half to its initial value. The half-life of any radioisotope is represented by \(t_{1/2}\) .

Americium-241 (²⁴¹Am) is the most common isotope of americium.

Americium-241 has a half-life of 432 years.

Am-241 decays by emitting alpha particles and gamma radiation to become neptunium-237.

Thus, the most helpful feature of the radioisotope americium-241 for the smoke detector to work is its Long half-life.

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Smoke detectors are the safety devices for fire protection that detects smoke and gives alarms as a warning. The long half-life of the radioisotope would be most practical for the detector.

Radioisotopes are chemical substances that have unstable neutrons, protons and some amount of excess energy. They have a half-life which is the time by which they get reduced or decay to half quantity.

Americium-241 is the radioactive isotope of americium and have a half-life of 432.2 years. It helps in the alarm as the smoke particle disrupt the electric current produced by the isotope and results in the warning of the device to go on.

Therefore, option A. long half-life is the feature that would be most useful for the smoke sensor.

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Answer: The final volume in the balloon is \(68.818cm^3\)    

Explanation:

Charles' Law states that volume is directly proportional to the temperature of the gas at constant pressure and number of moles of gas.

Mathematically,

\(\text{Volume}\propto \text{Temperature}\)

Or,

\(\frac{V_1}{T_1}=\frac{V_2}{T_2}\)   (At constant pressure and number of moles)

\(V_1\) = initial volume = 52000 L

\(V_2\) = final volume = ?

\(T_1\) = initial temperature = \(500^0C=(500+273)K=773 K\)

\(T_2\) =  final temperature = \(750^0C=(750+273)K=1023 K\)

\(\frac{52000}{773}=\frac{V_2}{1023}\)

\(V_2=68818L=68.818ml=68.818cm^3\)       \((1L=1000ml=1000cm^3)\)

Thus final volume in the balloon is \(68.818cm^3\)    

Answer:

Approximately \(2.890\; \rm m\) (assuming that the speed of light in air is approximately \(2.997 \times 10^{8}\;\rm m \cdot s^{-1}\).)

Explanation:

The wavelength of a wave is the distance (the energy of) that wave covers in one cycle of that wave.

On the other hand, the frequency of a wave gives the number of cycles of that wave in unit time. (If the unit of frequency is \(\rm Hz\) or \(\rm s^{-1}\), one unit time would be one second.)

First step: calculate the period of this wave. That's the same as finding the duration of each cycle of this wave.

The question states that the frequency of this wave is \(f = 103.7 \; \rm MHz = 103.7 \times 10^{6}\; \rm s^{-1}\). In other words, there are \(103.7 \times 10^{6}\) cycle of this wave in every second.

Each of these cycle have the same length. Therefore, the duration of one such cycle would be:

\(\begin{aligned} T &= \frac{1}{f} \\ &= \frac{1}{103.7 \times 10^{6}\; \rm s^{-1}} \approx 9.64320 \times 10^{-9}\; \rm s\end{aligned}\).

That would also be the period of this wave.

Second step: using the speed of this wave, calculate the distance that this wave would travel in each period. That distance would be the wavelength of this wave.

Electromagnetic waves travel at the speed of light. In the air, that speed would be approximately \(2.997 \times 10^{8}\;\rm m \cdot s^{-1}\). That is: \(v\approx 2.997 \times 10^{8}\;\rm m \cdot s^{-1}\).

The first step shows that the period of this wave is approximately \(9.64320 \times 10^{-9}\; \rm s\). Calculate how far this wave would have covered in that much time when travelling at the speed of light in the air:

\(\begin{aligned} \lambda &= v \cdot T \\ &\approx 2.997 \times 10^{8}\;\rm m \cdot s^{-1} \\ &\quad \times 9.64320 \times 10^{-9}\; \rm s \\ &\approx 2.890\; \rm m \end{aligned}\).

In other words, the wavelength of this wave in the air would be approximately \(2.890\; \rm m\).

The mass of ammonia that would be produced is 312.5 g

First, we will write a balanced chemical equation for the reaction

The balanced chemical equation for the reaction is

3H₂(g) + N₂(g) → 2NH₃(g)

This means

3 moles of hydrogen gas reacts with 1 mole of nitrogen gas to produce 2 moles of ammonia.

First, we will determine the number of moles of each reactant present

For Hydrogen (H₂)

Mass = 83.6 g

Molar mass = 2.016 g/mol

Using the formula

\(Number\ of\ moles = \frac{Mass}{Molar\ mass}\)

Number of moles of H₂ present = \(\frac{83.6}{2.016}\)

∴ Number of moles of H₂ present = 41.468254 moles

For Nitrogen (N₂)

Mass = 257 grams

Molar mass = 28.0134 g/mol

∴ Number of moles of N₂ present = \(\frac{257}{28.0134}\)

Number of moles of N₂ present = 9.174181 moles

Since,

3 moles of hydrogen gas reacts with 1 mole of nitrogen gas to produce 2 moles of ammonia

Then,

27.522543 moles of hydrogen gas will react with the 9.174181 moles of nitrogen gas to produce 18.348362 moles of ammonia

∴ 18.348362 moles of ammonia will be produced during the reaction

Now, for the mass of ammonia that would be produced

From the formula

Mass = Number of moles × Molar mass

Molar mass of ammonia = 17.031 g/mol

Mass of ammonia that would be produced = 18.348362 × 17.031

Mass of ammonia that would be produced = 312.49095 g

Mass of ammonia that would be produced ≅ 312.5 g

Hence, the mass of ammonia that would be produced is 312.5 g

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