What is the change in entropy of 73.8 g of neon gas when it undergoes isothermal contraction from 22.6 L to 13.3 L? Assume ideal gas behavior. Enter a number to 2 decimal places.

Answer:

write the following as fractions in their simplest form

Answer:

This question lacks options, the options are:

A: Two students of similar mass run into each other. They bounce off each other when they collide.

B: Two students of similar mass run side by side into a wall and punch holes of equal size before emerging on the other side.

C: Two students of similar mass run in opposite directions, but one accelerates at twice the rate of the other.

D: Two students of similar mass run at the same speed in opposite directions on a track. They will collide with 400 Newtons of force in 400 meters.

The answer is A.

Explanation:

Isaac Newton proposed three laws, which he called laws of motion. The third of these laws states that for every action, there is an equal and opposite reaction. This means that if an object A collides with object B, object B will exert a force of similar magnitude but in opposite direction on object A.

From the examples in the option, when two students of similar mass run into each other. They bounce off each other when they collide. This means that student 1 and student 2 will go in opposite directions after collision with one another. This portrays Newton's third law of motion.

Out of the molecules F₂, B₂, O₂, N₂, only O₂ is paramagnetic. Therefore, the correct answer is (B) 1. Paramagnetic substances have unpaired electrons in their molecular orbitals.

In O₂, there are two unpaired electrons, which makes it paramagnetic. On the other hand, F₂, B₂, and N₂ have all of their electrons paired in their molecular orbitals, making them diamagnetic. Diamagnetic substances do not exhibit any unpaired electrons and are weakly repelled by a magnetic field.

O₂ is the only molecule among the given options that is paramagnetic due to its unpaired electron configuration, while F₂, B₂, and N₂ are diamagnetic as they have all of their electrons paired in their molecular orbitals.

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Answer:

A small positively charged nucleus surrounded by revolving negatively charged electrons in fixed orbits

X(N03)2

Given: Consider a hypothetical atom x

molecular formula of calcium nitrate = Ca(NO3)2

formula of x chloride is xcl2

molecular formula for x nitrate = ?

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Answer:

C - raising the temperature of a gas

Explanation:

as you raise temperature, kinetic energy rises, and so does pressure

Answer:

C.

raising the temperature of the gas

Explanation:

Edg. 2020

Other guy is right i got 100%

Answer: CH3CHClCH2Cl

Explanation:Equation is already balanced

Answer:

C

Explanation:

because 37 does not end with 5 or 0, so it'd be harder to see if the water temperature is accurate if your thermometer goes up by 5s or 10s. And using D, the one that goes up by 20s is out of the question, it'd be too difficult to read. Using a thermometer that goes up by 1s is just best because you can be positive when the water is at 37°C

Answer:

9 g

Explanation:

Chemical equation:

CH₄ + 2O₂    →       CO₂ + 2H₂O

4        16                 11         9

4+16 = 20               11+9 = 20

9 gram of water must be produced because according to law of conservation of mass, mass neither created nor destroyed thus on both side of equation mass must be same.

Law of conservation of mass:

According to the law of conservation mass, mass can neither be created nor destroyed in a chemical equation.

This law was given by French chemist  Antoine Lavoisier in 1789. According to this law mass of reactant and mass of product must be equal, because masses are not created or destroyed in a chemical reaction.

For example:

6CO₂ + 6H₂O + energy → C₆H₁₂O₆ + 6O₂

there are six carbon atoms, eighteen oxygen atoms and twelve hydrogen atoms on the both side of equation so this reaction followed the law of conservation of mass.

(a) The missing condition in the given set up is the heat source. Heat is required to initiate the reaction between substance X and soda lime, leading to the formation of ethane.

(b) Substance X is likely a halogenated hydrocarbon, such as a halogenalkane or alkyl halide. The chemical formula of substance X would depend on the specific halogen present. For example, if X is chloromethane, the chemical formula would be \(CH_{3}Cl\).

(c) Alongside ethane, the reaction would produce a corresponding alkene. In this case, if substance X is chloromethane (\(CH_{3} Cl\)), the product formed would be methane and ethene (\(C_{2} H_{4}\)).

Alkanes, a class of saturated hydrocarbons, have several practical uses. Three common uses of alkanes are:

1. Fuel: Alkanes, such as methane (\(CH_{4}\)), propane (\(C_{3}H_{8}\)), and butane (C4H10), are commonly used as fuels. They have high energy content and burn cleanly, making them ideal for heating, cooking, and powering vehicles.

2. Solvents: Certain alkanes, like hexane (\(C_{6}H_{14}\)) and heptane (\(C_{7} H_{16}\)), are widely used as nonpolar solvents. They are effective in dissolving oils, fats, and many organic compounds, making them valuable in industries such as pharmaceuticals, paints, and cleaning products.

3. Lubricants: Some long-chain alkanes, known as paraffin waxes, are used as lubricants. They have high melting points and low reactivity, making them suitable for applications such as coating surfaces, reducing friction, and protecting against corrosion.

Overall, alkanes play a significant role in various aspects of our daily lives, including energy production, chemical synthesis, and industrial processes.

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preparing a standard solution in a volumetric flask is a reliable and accurate method for ensuring that the concentration of the solution is consistent, precise, and efficient.

Preparing a standard solution in a volumetric flask is important for several reasons:

Accuracy: Volumetric flasks are designed to contain a specific volume of liquid to a very high level of accuracy. The volume of the flask is certified and calibrated by the manufacturer, which means that it is a reliable tool for measuring precise volumes of liquid.

Consistency: When preparing a standard solution, it is important to ensure that the concentration is consistent throughout the solution. By using a volumetric flask, the concentration can be calculated based on the mass of the solute and the volume of the flask, which ensures that the concentration is the same throughout the entire solution.

Precision: Volumetric flasks have a narrow neck and are designed to be filled up to a specific level, which helps to minimize errors in measurement. This makes it easier to achieve precision in the preparation of the standard solution.

Efficiency: Volumetric flasks are specifically designed for the preparation of standard solutions, and their use can help to save time and reduce the risk of errors in measurement.

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The ashes contain chemicals which have alkaline nature and the range of pH is from 10 to 12. Ashes are made up of atoms of different elements.

Ashes are defined as something which is left after burning or destroying some substances by fire. It is a greyish-white to black powder residue left when something is burned.

In the branch of analytical chemistry ashes are generally used to identify the mineral and metal content of the chemical samples. Ash is the non-liquid residue.

Ashes contain many atoms of the elements like carbon, calcium, magnesium, potassium, aluminium, phosphorous, etc.

Thus ashes are not remnants, it contains many atoms.

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Answer:

Try to make it more detailed "Chemistry is the study of all substances" is an amazing start. Can you give some examples of chemistry? Try to make a small paragraph.

Explanation:

Explanation:

Chemistry, the science that deals with the properties, composition, and structure of substances (defined as elements and compounds), the transformations they undergo, and the energy that is released or absorbed during these processes.

This is a more detailed answer...

Answer: Vanadium, and Titanium

Explanation:

Answer:

(i) The balanced chemical reaction is given as follows :

Answer:

With the European Climate Law, the EU committing to carbon neutrality by 2050. What does that mean in practice?

Climate change is already affecting the entire world, with extreme weather conditions such as drought, heat waves, heavy rain, floods and landslides becoming more frequent, including in Europe. Other consequences of the rapidly changing climate include rising sea levels, ocean acidification and loss of biodiversity.

In order to limit global warming to 1.5 degrees Celsius – a threshold the Intergovernmental Panel for Climate Change (IPCC) suggests is safe – carbon neutrality by mid-21st century is essential. This target is also laid down in the Paris agreement signed by 195 countries, including the EU.

In December 2019, the European Commission presented the European Green Deal, its flagship plan that aims to make Europe climate neutral by 2050. This target will be reached through the European Climate Law that sets climate neutrality into binding EU legislation.

Explanation:

ok bet i got u

The passage suggests that the nucleus of a hydrogen atom is responsive to external magnetism.

The passage implies that the nucleus of a hydrogen atom is similar to a bar magnet in its responsiveness to external magnetism. Just like a bar magnet, the nucleus of a hydrogen atom can be influenced or affected by external magnetic fields.

This suggests that the nucleus possesses some inherent magnetic properties, making it susceptible to magnetic forces from its surroundings. Hydrogen atoms consist of a single proton in their nucleus, which carries a positive charge.

The proton, like a tiny magnet, generates a magnetic field due to its spin and charge. This property allows the nucleus to interact with external magnetic fields. When exposed to an external magnetic field, the nucleus aligns itself either parallel or anti-parallel to the field, depending on its orientation.

This responsiveness to external magnetism has significant implications in various fields of science. It forms the basis for nuclear magnetic resonance (NMR), a technique widely used in chemistry, physics, and medicine for studying molecular structures and analyzing chemical environments.

In NMR spectroscopy, the behavior of hydrogen nuclei in a sample is manipulated and measured using external magnetic fields, providing valuable insights into the sample's composition and properties.

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I believe it's (A). It will double.

Explanation:

Charles law states that the volume of an ideal gas is directly proportional to the absolute temperature at constant pressure. (Charles's law).

The pressure, volume, and temperature are the main factors of the ideal gas. At constant pressure when the temperature is doubled, then volume also gets doubled. Thus, option A is correct.

The ideal gas law has been known as the law that relates the pressure, volume, moles, and temperature of the gas particles. The relationship between the volume and the temperature of the gas was given by Charle's law.

According to Charle's law, the volume and the temperature have been known to have direct relation when the factor of pressure is said to be constant. If they exhibit the direct relation then doubling the temperature will double the volume of the gas.

Therefore, option A. the doubling of temperature doubles the volume is correct.

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The energy change that occurs when ice is added to the warm drink when a glass of water left in the sun becomes warm and Estella adds ice to the water to make it cool is that the water loses heat to the ice, causing the ice to melt.

The correct option is A.

Ice melts in warm water due to the transfer of heat energy from the water to the ice.

Heat flows from a warmer object to a cooler object until they reach thermal equilibrium, meaning they are at the same temperature. In the case of ice melting in warm water, the water is warmer than the ice, so heat flows from the water to the ice, causing the ice to melt.

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Answer:

C + 2H2 ⇒ CH4

Explanation:

In order to balance a chemical equation you need to make sure that the number of atoms on both sides are equal

C + H2 = CH4

C = 1

H = 2

Products:

C = 1

H = 4

H2 = 2 × 2 = 4

C + 2H2 ⇒ CH4

Hope this helps.

Answer:

A.

Explanation:

specific heat of water is immense as compared to most of other known substances. The result of this characteristic is that water heats slowly and cools slowly. In coastal region and islands, the air above lands gets heated up quickly as compared to air above water.

The impact of the specific heat of water on the planet is that air above the ocean not easily gets heated.

Specific heat is define as the amount of heat needed to increase the one unit temperature of one gram of the substance.

Specific heat of water is equal to 1 calorie and it is that much of high as water will require a lot of energy to change its temperature, and not easily gets cool or warm. Due to this water of the oceans almost have the same temperature and air above the ocean not easilt gets warmer as comapre to the air over the coastal area.

Hence, impact of the specific heat of water on the planet explained above.

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Answer:

D. Volume

Explanation:

Properties mentioned in the question;

colour = gray

Nonmetallic

Density = 3.8 g/mL

Volume = 48.3 mL

Of the mentioned, which is extensive ?

Extensive properties are those properties that are proportional to the amount of substance present.

The correct option is D. Volume. The other properties do not change with increasing or decreasing amount of the mineral

24.22 g of ethyl butyrate would be produced from 15.6 g of butanoic acid and excess ethanol using the more efficient catalyst.

The balanced equation for the reaction of butanoic acid and ethanol to produce ethyl butyrate is:

C4H9COOH + C2H5OH → C6H12O2 + H2O

The molar mass of butanoic acid is 88.11 g/mol. Thus,

15.6 g of butanoic acid is equivalent to 15.6 g/mol ÷ 88.11 g/mol = 0.177 mol of butanoic acid.

Based on the balanced equation, 1 mol of butanoic acid reacts with 1 mol of ethanol to produce 1 mol of ethyl butyrate. Hence, 0.177 mol of butanoic acid reacts with 0.177 mol of ethanol to produce 0.177 mol of ethyl butyrate. To calculate the theoretical yield of ethyl butyrate, we need to determine the number of moles of ethyl butyrate produced. The molar mass of ethyl butyrate is 144.21 g/mol. Hence, the number of moles of ethyl butyrate produced is:

0.177 mol × (1 mol ethyl butyrate ÷ 1 mol butanoic acid) × (144.21 g/mol ethyl butyrate) = 25.59 g ethyl butyrate.

Therefore, the theoretical yield of ethyl butyrate is 25.59 g. The catalyst increases the yield of ethyl butyrate to 94.6%. Hence, the actual yield of ethyl butyrate is:

Actual yield = 94.6% × theoretical yield= 0.946 × 25.59 g= 24.22 g

Therefore, 24.22 g of ethyl butyrate would be produced from 15.6 g of butanoic acid and excess ethanol using the more efficient catalyst.

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The mole fraction of the KOH is 0.025.

We know that the mole fraction is the ratio of the moles to the total number of moles.

Thus;

Number of moles of KOH =  56g/56 g/mol = 1 mol

Number of moles of water = 700.0g/18 g/mol = 39 moles

Now;

Mole fraction of KOH = 1 mol/1 mol + 39 moles = 1/40 = 0.025

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Answer:

When solid oxalic acid dissolved in water, it dissociates ,  H+ - ions is formed, so acidic properties can be observed.

Explanation:

When solid oxalic acid dissolved in water, it dissociates ,  H+ - ions is formed, so acidic properties can be observed.

C2H2O4 ----> \(H^{+}\) + \(C_{2}HO_{4}^{-}\)

\(C_{2}HO_{4}^{-} ----> H^{+} + C_{2}O_{4}^{2-}\)

When oxalic acid is solid, there are no free moving H+ - ions , so acidic properties can not be observed.

The density of borosilicate glass is different from the weighted average of the densities of its components because the density of a glass is influenced by its molecular structure and the way its atoms are arranged, rather than a simple weighted average of its components.

Borosilicate glass is a type of glass that contains boron trioxide, which makes it more resistant to thermal expansion and chemical corrosion. When the glass is formed, the components (such as silicon dioxide, boron trioxide, and other metal oxides) are combined at high temperatures, causing them to form a new amorphous material with a unique atomic structure.
The arrangement of atoms and bonding in borosilicate glass is not linear or consistent, and it can differ from the atomic arrangements found in the individual components. This irregular structure results in the overall density of the glass being different from a simple weighted average of the densities of its individual components.
In summary, the density of borosilicate glass is different from the weighted average of the densities of its components due to the unique molecular structure and atomic arrangements that occur when the glass is formed.

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Answer:

6.02×10²³ particles / 1 mol

Explanation:

In this question the choices are missed.

For determine the particles of Na, in 0.25 moles we should know that the mole referrs to the Avogadro's number.

1 mol of anything contains 6.02×10²³ entities, that's why we should apply this conversion factor to find the final answer:

0.25 mol . 6.02×10²³ particles / 1 mol = 1.50×10²³ particles

In conclussion: 1.50×10²³ particles of Na are contained in 0.25 moles of Na

Answer:120.0mL

Explanation:

The osmotic pressure associated with 50.0 g of an enzyme of molecular weight 98,000 g/mol dissolved in water to give 2600 ml of solution at 30.0 °C is 4.90 × 10^-3 atm.

The osmotic pressure is the pressure that's needed to stop water from diffusing into a solution through a semipermeable membrane. It's proportional to the molar concentration of the solute and the temperature and is inversely proportional to the molecular weight of the solute.

Osmotic pressure can be calculated by the following formula :

π = MRT , where π = osmotic pressure ; M = molar concentration ; R = ideal gas constant ;T = absolute temperature (K)

Step 1. First, we need to calculate the molarity of the solution using the following formula :

moles of solute = mass of solute/molecular weight of solute

so , moles of solute = 50 g/98000 g/mol= 0.0005102 mol

Step 2. To calculate the molarity of the solution :

Molarity = moles of solute/volume of solution (in L)

Molarity = 0.0005102 mol/2.6 liters= 0.0001962 M

Absolute temperature = 30°C + 273 = 303 K.

R = 0.0821 L atm mol^-1 K^-1.

π = MRT = (0.0001962 M) (0.0821 L atm mol^-1 K^-1) (303 K) = 4.90 × 10^-3 atm

Therefore, the osmotic pressure associated with 50.0 g of an enzyme of molecular weight 98,000 g/mol dissolved in water to give 2600 ml of solution at 30.0 °C is 4.90 × 10^-3 atm

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Answer:

Joule

Explanation:

This is the answer