A gas is initially at a pressure of 225 kPa and a temperature of 245 K in a container that is 4.5 L. If the gas is compressed to a volume of 2.1 L and the temperature changes to 275 K, what is the new pressure?

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Answer 1
Answer: Use the ideal gas equation PV=nRT. You can compare before and after using P1V1/n1T1=P2V2/n2T2. Since the number of moles remains constant you can disregard moles from the equation and use pressure, volume and temp. Make sure your pressure is converted to atmospheres, your volume is in liters, and your temperature is in kelvins.

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How are gamma rays made? Also, how are they important?

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How are they made-
Gamma rays are given off by stars, and by some radioactive substances.
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Gamma rays are generated by radioactive atoms and in nuclear explosions. gamma rays are used to kill cancerous cells which is why it is used in medicine.

What is the relationship
between different forms of energy?​

Answers

Answer:

Energy exists in different forms, all of which can be classified as either potential energy or kinetic energy. Potential energy is energy stored in an object due to its position or arrangement. Kinetic energy is energy of an object due to its movement - its motion.

Explanation:

Answer:The law of the conservation of energy states that energy is neither created nor destroyed. Instead, it is simply transferred from one type of energy to another, or from one form of energy to another. The difference between mechanical energy and kinetic energy is that kinetic energy is a type of energy, while mechanical energy is a form of energy.

Which quantities must be conserved in all chemical reactions? 1) mass, charge, density
2)mass, charge, energy
3) charge, volume, density
4) charge, volume, energy

Answers

   2) mass, charge, energy


in a balanced reaction, all of the following are conserved

Answer: It's B this will help u

The following balanced equation shows the formation of sulfur dioxide. S + O2 mc023-1.jpg SO2 How many moles of sulfur are needed to produce 15.0 mol of sulfur dioxide?

Answers

For the given chemical reaction, 15 moles of sulfur are required to produce 15 moles of sulfur dioxide.

What is the balanced chemical equation?

A chemical equation can be defined as a representation of a chemical reaction in the form of symbols of the substances. A chemical equation consists of contributing reactants in the reaction, formed products, and their physical states.

The chemical equation in which the number of atoms of each element is equal on both sides of the equation is called a balanced chemical equation.

The law of conservation of mass follows by a balancing of a chemical equation therefore, the total mass of the elements on the reactant side must be equal to the total mass of elements on the product side.

Given, the chemical equation is:  S + O₂ → SO₂

From the above equation, we can say that one mole of sulfur produces one mole of sulfur dioxide.

Given the moles of the sulfur dioxide = 15 moles

The moles of sulfur required to make 15 moles of sulfur = 15 moles

Therefore, 15 moles of sulfur are required for the given conditions.

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S + O₂ = SO₂

1 mole S ------------ 1 mole SO₂
? mole S ----------- 15.0 mole SO₂

S = 15.0 * 1 / 1

= 15 moles of S

hope this helps!

"For the following compound with three carbonyl groups, can you rank these carbonyl groups in order of increasing wavenumber in an infrared (IR) spectrum, and explain the reasoning behind the ranking?"

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Explanation:

The wavenumber of absorption peaks in an infrared (IR) spectrum is related to the vibrational frequencies of chemical bonds within a molecule. Different functional groups and bond types exhibit characteristic wavenumbers in the IR spectrum. When ranking carbonyl groups in a compound by increasing wavenumber, you can consider the following principles:

1. Single bonds vibrate at lower wavenumbers than double bonds.

2. Carbon-oxygen double bonds (C=O) vibrate at higher wavenumbers than carbon-oxygen single bonds (C-O).

3. The presence of electron-withdrawing groups can increase the wavenumber of the carbonyl group.

Based on these principles, here's how you can rank the carbonyl groups in the compound from lowest to highest wavenumber:

1. Carbonyl group without any adjacent electron-withdrawing groups (lowest wavenumber): This carbonyl group, if it's surrounded by alkyl or other non-electron-withdrawing groups, will have the lowest wavenumber since it's less polar and experiences weaker stretching vibrations.

2. Carbonyl group with adjacent electron-withdrawing groups: If a carbonyl group is adjacent to electron-withdrawing groups (e.g., nitro groups, fluorine atoms, etc.), it will have a higher wavenumber. The presence of these groups increases the polarity and strength of the C=O bond, causing it to vibrate at a higher frequency.

3. Carbonyl group in a conjugated system: If a carbonyl group is part of a conjugated system (alternating single and double bonds), it will have the highest wavenumber. Conjugation enhances the electron delocalization and increases the wavenumber of the carbonyl group.

So, in summary, the ranking of carbonyl groups by increasing wavenumber in an IR spectrum would generally be: carbonyl without adjacent electron-withdrawing groups < carbonyl with adjacent electron-withdrawing groups < carbonyl in a conjugated system.

What is the primary cause of diffusion? 1.that some substances can dissolve in solvents 2.heat added to a substance 3.random internal motion of atoms and molecules 4.attraction of opposite atomic charges

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the correct answer its:

random internal motion of atoms and molecules

hope it helps

Final answer:

The primary cause of diffusion is the random internal motion of atoms and molecules resulting from their thermal energy, leading substances to move from areas of high concentration to areas of lower concentration until evenly distributed. Factors like temperature and the mass of diffusing molecules affect the speed of diffusion. The process continues until it reaches a dynamic equilibrium, where there is no concentration gradient and no net movement of substances.

Explanation:

The primary cause of diffusion is the random internal motion of atoms and molecules due to their thermal energy, a concept derived from Physics. This motion allows substances to move in a way that they can evenly distribute themselves throughout a given space. As a result, diffusion is characterized by movement from high to lower concentration areas, a process that goes on until the substance is evenly distributed in a system.

Several factors can affect diffusion, such as temperature and the mass of the diffusing substance. Higher temperatures enhance the energy and therefore the movement of the molecules, leading to an increased diffusion rate. In contrast, lower temperatures decrease the energy and movement of molecules, thus reducing the diffusion rate. The mass of the molecules diffusing also plays a role - heavier molecules move slower, and therefore diffuse more slowly, whereas the reverse is true for lighter molecules.

A concentration gradient is the factor that primarily fuels the diffusion process. Greater the difference in concentration, the more rapid the diffusion. In case of solutions containing more than one substance, each type of molecule diffuses according to its unique concentration gradient, independently of other substances.

Eventually, the system reaches a stage known asdynamic equilibrium. At this stage, there's no net movement of the substance, yet the molecules continue to move around in the space. The concentration gradient no longer exists, which means that diffusion has ceased.

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