Which statement accurately describes what happens when water turns to stream in terms of energy?

A. The water releases energy which causes chemical bonds to break, changing water to steam.

B. The water releases energy which causes the water molecules to have less kinetic and potential energy, changing their configuration from liquid to gas.

C. The water absorbs energy which causes chemical bonds to break, changing water to steam.

D. The water absorbs energy which causes the water molecules to have more kinetic and potential energy, changing their configuration from a liquid to a gas.

To find the number of moles of xenon in a 12.00g sample, divide the mass by the molar mass of Xe, approximately 131.29 g/mol.

This is a basic chemistry problem involving the use of the molar mass of an element to convert from grams to moles.

To find the number of moles, we use the molar mass of xenon, which can be found on the periodic table. Xenon's molar mass is approximately 131.29 g/mol. Therefore, to convert grams to moles, we take the mass of the sample and divide it by the molar mass of the substance:

For a 12.00g sample of xenon, the calculation would be:

The 1 molecule of CH₂Cl₂ contains 2 hydrogen atoms so for 5 molecules of  CH₂Cl₂  there will be 10 hydrogen atoms.

Molecules are defined as a group of two or more atoms that forms a smallest identifiable unit into which pure substance can be divided and still retain the composition and properties of that substance.

It can also be defined as two or more atoms connected by a chemical bonds.

Atoms can be defined as a smallest unit of ordinary matter that forms a chemical elements.

Thus, the 1 molecule of CH₂Cl₂ contains 2 hydrogen atoms so for 5 molecules of CH₂Cl₂ there will be 10 hydrogen atoms.

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The similarity between Gregor's life before and after his physical transformation is that,

The changes occurs are,

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Answer: Option (B) is the correct answer.

Explanation:

When water converts from vapor form to liquid form then this process is known as condensation.

Water vapors are the gaseous form of water, that is, its molecules are weakly held by Vander waal forces.

When temperature is decreased then water vapor converts into liquid form.

Thus, we can conclude that when water vapor cools then most likely it changes into liquid.

According to the forces of attraction, when vapor cools it changes to liquid thus option B is correct.

Forces of attraction  is a force by which atoms in a molecule  combine. it is basically an attractive force in nature.  It can act between an ion  and an atom as well.It varies for different  states  of matter that is solids, liquids and gases.

The forces of attraction are maximum in solids as  the molecules present in solid are tightly held while it is minimum in gases  as the molecules are far apart . The forces of attraction in liquids is intermediate of solids and gases.

The physical properties such as melting point, boiling point, density  are all dependent on forces of attraction which exists in the substances.

Thus, when vapor cools it changes to liquid thus option B is correct.

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Irradiated food is shown to not be radioactive, which directly dispels safety concerns. Gamma irradiation safely extends food shelf life by eliminating harmful microbes and is regulated by the FDA to ensure safety. Option B is correct.

The best choice that would contradict the safety concerns about irradiated food is Irradiated food is shown to not be radioactive. This directly addresses the main public concern that consuming irradiated food could lead to exposure to radioactivity.

Gamma irradiation is used as a method to eliminate harmful microbes in food, thereby extending its shelf life and making it safer. The foods subjected to irradiation do not become radioactive themselves because the irradiation process does not involve direct contact with radioactive materials. Furthermore, the Food and Drug Administration (FDA) regulates the sources of radiation and has determined that irradiating food is a safe practice.

Thus, contradicting the misconception, irradiated food retains its nutritional quality and is considered safe for consumption.

Hence, B. is the correct option.

The complete question is:

Gamma rays are often used to kill microorganisms in food, in an attempt to make the food safer. Some people contend that this irradiated food is actually less safe to eat. Which, if true, would most effectively dispute their idea?

A) Irradiated food only emits alpha particles, which are harmless.

B) Irradiated food is shown to not be radioactive.

C) Irradiated food only contributes to background radiation.

D) Irradiated food has molecules that undergo transmutation

The mass of copper will remain the same. Therefore, the mass of the copper is equal to 1 Kg. Therefore, option A is correct.

Matter can be transformed form through physical changes and chemical changes from one form to another form, but through all changes, the matter will remain conserved. The same quantity of matter will be there even before and after the change therefore none of the matter is created or destroyed.

According to this law, that mass is never formed nor destroyed, although it may be rearranged in space with the changes associated with it may be changed its form.

For example, the mass of the chemical components before the reaction in chemical reactions is equal to the mass of the components after the reaction.

On hammering the copper mass into the tin sheet, the shape of the copper mass will change but the mass of the metal will remain the same. Therefore, the mass of the copper is equal to 1 Kg.

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Final answer:

The mass of the copper sheet after it has been hammered remains 1 kg, as the mass of an object does not change due to changes in shape or size (option A).

Explanation:

The mass of the copper sheet after it has been hammered into a thin sheet remains the same, regardless of its shape or size alterations. The fundamental principle here is the conservation of mass, implying that the mass of an object doesn't change unless material is added to or removed from it. No such addition or removal of material is mentioned in the question.

Therefore, even after the transformation of the 1 kg block of copper into a copper sheet of length 30 cm, the mass of the copper sheet will be 1 kg, corresponding to option A. This is because the question states that it is the same block of copper that has been reformed, so no mass has been lost or gained in the process.

Answer:

This atom is chlorine.

The mass of this atom is 35 amu.

This atom has an overall charge of 0.

ExplanatiI GOT IT RIGHT

Final answer:

Dustin's statement that both matter and energy cycle through an ecosystem is the most accurate, as energy flows through an ecosystem and is lost as heat, while matter is recirculated via biogeochemical cycles.

Explanation:

Among the statements made by the four friends regarding how matter and energy move through an ecosystem, Dustin's statement aligns most closely with scientific understanding. Energy enters an ecosystem from external sources, primarily the sun, and flows through the ecosystem from producers to consumers in a one-way path, ultimately being lost as heat. Unlike energy, matter, such as water, carbon, and nitrogen, is recycled within the ecosystem through biogeochemical cycles. These cycles involve both living organisms and non-living matter, ensuring that matter is continually used and reused within the ecosystem.

Chemical and physical properties are used to help identify substances. A substance's chemical properties identify whether or not that substance reacts with another substance or it can be said that a chemical property of a substance will helps in deciding whether the substance will react or not with another substance. To react with oxygen, the substance should have the ability to burn, the more quickly the substance burn, more readily the substance will burn to produce light and heat.

This can also be explained with the formation of rust on a chemical compound, The more readily the compound reacts with oxygen, more readily it undergoes rusting .

For example when iron kept in open air, it undergoes rust as it reacts with oxygen.

Answer:

C-A laser beam looks bent when it passes through glass blocks

Explanation:

Refraction is the change in the speed of the light when passing from one medium to another with a different refractive index. While changing the medium light appears to change the direction or bent towards the normal -  a perpendicular line to the horizontal line.

The experiment involves alpha, beta, and gamma rays (different types of radioactive decay) passing through electrically charged plates, being attracted based on their charge, with alpha particles going to the negative plate, beta particles to the positive, and gamma rays passing through unaffected.

The experiment described involves the passing of radioactive emissions from various atoms through a pair of electrically charged plates. The attraction of certain particles to either the positive or negative plate hints at the different types of radioactive decay: alpha, beta, and gamma.

Alpha particles, being positively charged helium atoms, are attracted to the negatively charged plate. Beta particles - high-energy electrons - have a negative charge, thus are attracted to the positive plate. Finally, gamma rays, which are uncharged electromagnetic waves, are not affected by the electric field and pass through unaffected.

This experiment mirrors the studies conducted by Ernest Rutherford where he utilized electrical fields to distinguish and classify these types of radioactive decay.

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Answer:

The correct answer is option C.

Explanation:

Properties of transition metals:

Answer:

1 and 2

Explanation:

i just took the exam on plato, plus its common sense and it cannot be 3 because it has nothing to do with it.

The salinity of the ocean decreases at area 1, where a stream flows into it, and at area 2, where rainfall adds freshwater. Evaporation at area 3 increases salinity as only water is removed, not the salts.

The areas where the salinity of the ocean decreases are areas where freshwater is added to the ocean. At area 1, where a stream empties into the ocean, freshwater from the stream mixes with saltwater, diluting the salinity. Similarly, at area 2, when precipitation such as rain enters the ocean, it also lowers the salinity because rainwater has lower salt content compared to ocean water. On the other hand, at area 3, where evaporation occurs, water is removed from the ocean leaving the salts behind, which actually increases the ocean's salinity.

Salinity is a key component of the water cycle and the ocean's composition. The saltwater in the oceans is highly saline, with about 35,000 mg of dissolved ions per liter. When freshwater, which has lower salinity, enters the ocean, it causes a decrease in the overall salinity of the ocean at the point of entry. In contrast, evaporation of ocean water leaves the salts behind, resulting in increased salinity.

Answer:

is unequally distributed

Explanation:

because my finals say so

Hello!

Most people/ animals died from Hurricane Katrina. 600,000 pets died from the devastating hurricane and 1,833 people died. People adapted by getting to higher ground and doing what you can to survive. Animals unfortunately didn't have the capabilities to climb upon houses and such. They don't have arms and legs like humans do, so many animals died. Animals that died are : cows, dogs, cats, and such on. 80% of New Orleans was under water and up to 20 ft deep in some places.

Hope it helps!

The correct Answer Is B