Question 25———-A, YA are two isotopes of element A.
Difference between the number of neutrons
in the isotopes is?

Answer:

Potassium nitrate or KNO3

Explanation:

Answer:b

Explanation:

Answer:

Bonds can be placed on a scale that ranges from 100% ionic to 100% covalent.

CO2: CO2 is a covalent compound, with each carbon atom sharing electrons with two oxygen atoms. Therefore, it can be placed closer to the 100% covalent end of the scale.

N2: N2 is a covalent compound, with each nitrogen atom sharing electrons with another nitrogen atom. Therefore, it can be placed closer to the 100% covalent end of the scale.

NaF: NaF is an ionic compound, consisting of a sodium cation (Na+) and a fluoride anion (F-). Therefore, it can be placed closer to the 100% ionic end of the scale.

H2O: H2O is a polar covalent compound, with the hydrogen atoms sharing electrons with the oxygen atom, but the electrons are not shared equally, therefore the oxygen atom has a partial negative charge and hydrogen atoms have a partial positive charge. Therefore, it can be placed closer to the middle of the scale, between ionic and covalent.

Overall, the scale can be represented as follows:

100% Ionic <-------> NaF <-------> H2O <-------> CO2 <-------> N2 <-------> 100% Covalent

Answer:

Explanation:

Answer:

Prevailing winds are the result of atmospheric circulation cells. They influence the climate of a region. Rising and sinking air can influence the precipitation of a region. Atmospheric circulation cells create the general climate of a region.

Explanation:

Answer:

As I'm Not % Sure I Can Say C & D don't seem Right, Leaving A & B Having Me to Think the Answer is A (Hope I'm Right Good-Luck)

Explanation:

Answer:  Mountains block the winds that bring rain clouds.

Explanation: By acting as obstacles to the flow of air masses, mountains contribute significantly to the dryness of deserts. Orographic lifting is a process that occurs when moist air is forced to ascend as it approaches a mountain range. The moisture in the air condenses and forms clouds as the air cools as it climbs. As a result, on the windward side of the mountains, the air loses a lot of its moisture as precipitation. The air has already lost a significant amount of moisture by the time it reaches the leeward side of the mountains, creating a rain shadow effect. On the leeward side of the mountains, this impact results in a dryer area that is often a desert. Consequently, the existence of mountains influences

The Maxoids are living things because they possess the characteristics of living things.

Living things are things which have life in them.

Living things are identified by the characteristics which make them living.

The characteristics of living things include:

Considering the Maxoids;

In conclusion, the Maxoids are living things.

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I believe number one has 2 valance electrons

number 2 has 1 valance electron

and number 3 has 8 valance electrons

valance electrons are the electrons on the outermost ring

Answer:

There could be several possible reasons for a small gap between rails on a railway track, such as:

1. Expansion joints: Railways are designed to allow the tracks to expand and contract with changes in temperature. To accommodate this expansion, small gaps are left between the rail ends and filled with expansion joints or plates.

2. Wear and tear: Over time, the rails may experience wear and tear due to heavy loads, weather conditions, and other factors. As a result, small gaps can appear between the rails.

3. Maintenance: During maintenance activities, rail tracks may be adjusted or replaced, which could lead to small gaps between the rails.

4. Environmental factors: Environmental factors such as soil shifts, earthquakes or other natural disasters can also affect the alignment of the rails, leading to small gaps.

These are some of the possible reasons for a small gap between the rails on a railway track.

Answer:

The small gap left between the rails in a railway track is intentional and serves a specific purpose. This gap is known as the rail joint, and it allows for the expansion and contraction of the rails due to changes in temperature. When the temperature changes, the metal rails will expand or contract, and if they were joined together tightly, they could buckle or become deformed, which could be dangerous for trains passing over them. The rail joint allows the rails to move slightly and prevent damage to the track.

Additionally, the rail joint also allows for maintenance and repairs of the track. If there were no gap between the rails, it would be challenging to replace a damaged rail or perform routine maintenance, such as tightening bolts or lubricating joints. With the rail joint, maintenance personnel can easily access and work on the track.

Overall, the small gap left between the rails in a railway track is intentional and serves a crucial function in ensuring the safety and reliability of the track.

Answer:

The chemical formula for methane is \(CH_{4}\).

Hope this helps!

Answer:

Option (D) A Generator

Explanation:

A generator is an equipment that has to do with the production of electricity by the use of electromagnetic induction. The generator has split rings that make contact with the exterior.

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Answer:

option A is the correct answer for ur question

Answer:

A benefit of the opinion of a scientific author is that you can see others points of view on a subject.  A drawback is that they are using an opinion and most likely not stating unbiased facts.

Explanation:

Hope this helps

Answer:

Highlights:

*Researchers in the sciences do not see access to the scientific literature as an especially important problem.

*Authors consider factors such as journal reputation and the absence of publication fees when deciding where to submit their work. In contrast, free access is not a significant factor in their submission decisions.

Implications:

*While open access has the potential to expand the authorship and readership of the scientific literature, that potential has not yet been realized.

*Librarians who encourage scientists to publish in open access journals should be aware of the authors' priorities and perspectives. Authors in the sciences tend to focus on citation impact, reputation, and accessibility to a specialized readership—not breadth of readership, copyright, or access status.

*Journal publishers that charge publication fees may want to consider alternative sources of revenue. Authors' resistance to publication fees is a major barrier to greater participation in open access initiatives.

Explanation:

Answer:

8

Explanation:

There are 8 atoms of Br because there are two molecules of 4 atoms of Br. 4 x 2 = 8.

Answer: 1 mol Br contains 6.022×1023Br atoms;its mass is 79.90 g.

Explanation:

: I mole or bromine refers to 6×10^23 molecules of bromine. But 1 molecule of bromine has 2 atoms. Hence the atom count will be exactly twice.

Answer:

Extinction is often caused by a change in environmental conditions. When conditions change, some species possess adaptations that allow them to survive and reproduce, while others do not. If the environment changes slowly enough, species will sometimes evolve the necessary adaptations, over many generations.

Answer:

C

Explanation:

The Milky Way is the galaxy that includes the Solar System, with the name describing the galaxy's appearance from Earth: a hazy band of light seen in the night sky formed from stars that cannot be individually distinguished by the naked eye.

Milky Way can be referred to as the galaxy which contains Earth .  The milky way also  comprises of other solar systems such as the Sun and billions of stars.

The name 'milky way' came about as a result of how the sky looks when viewing it at night. It contain several bands of color in a milky manner which are usually difficult to differentiate.

The milky way comprises of different processes such as force of gravity acting on it and also the channeling of energy needed to produce stars which aids vision in the night.

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Answer:

a

Explanation:

just needed the points, sorry

Answer:

I'm confused what is this?

Explanation:

Answer:

Reprduce

Explanation:

The concept Le Chatelier's principle is used here to determine the effect of change of concentration, pressure and temperature on the state of equilibrium.

According to Le Chatelier's principle, If a system in equilibrium is subjected to a change in concentration, pressure or temperature the equilibrium shifts in the direction that tends to reduce the effect of the change.

Here adding CaO increases the rate of forward reaction. If the concentration of any reacting species is increased, the equilibrium will shift in the forward direction.

The given reaction is exothermic in forward direction. So the increase of temperature shift the equilibrium to the backward direction and the decrease in temperature shift the equilibrium to the forward direction.

Here increasing pressure will shift the equilibrium to the forward direction accompanied by a decrease in the number of moles.

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Answer:

the appearance of a new substance,

irreversible change has occurred

the absorption or release of energy.

Explanation:

Chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. These processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. Some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. Understanding chemical changes is a major part of the science of chemistry.

Answer:When one chemical substance is transformed into one or more substances.

Explanation: when iron becomes rust.

Answer:

Living beings and non-living things both follows the physical and chemical general principles, like the thermodynamic laws, and they are constituted both by atoms and molecules, the basis of the natural organization of all known matter on Earth.

Answer: Matter is anything that has mass or takes up space, something non living is a rock something living is a tree

Explanation:

Answer: 90 degrees F

Explanation:

Answer:

In the United States alone, the AKC's dog breed list currently includes 190 dog breeds. Worldwide, the FCI lists 360 officially recognized breeds.

Explanation:

The presence of glaciers on the surface of Africa is evidence that it moved outwards from a central point in southern Africa.

This is defined as the persistent body of dense ice that is constantly moving under its own weight.

Glaciers being found on African surface depicts that the movement occurred outward from Southern Africa during the period.

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Answer: Which substances are released during cellular respiration?

Use complete sentences to explain how the mass of oxygen is conserved during cellular respiration.

Explanation:

Answer:Use complete sentences to explain how the mass of oxygen is conserved during cellular respiration.

Answer:

A long range forecast is this answer

Answer:

Paraffin combustion produces more energy per gram than ethanol fuel but paraffin fuel has a larger carbon footprint

Explanation:

Paraffin is also known by the standard chemical name alkane with a chemical formula for a paraffin given as  follows;

CₙH₂ₙ₊₂

While gasoline, also known as petrol, consists of light weight alkanes and alkenes

The heat of combustion of gasoline is about 47.3 kJ/g

The combustion of gasoline is incomplete as presented in the following equation

\(C_x H_y+ O_2 +N_2 \rightarrow CO_2 + H_2O + CO + HC + NO_x\)

Example of complete combustion of octane, however, is given as follows;

2C₈H₁₈ + 25O₂ → 16CO₂ + 18H₂O  + Energy    

The source of paraffin is from petroleum

Ethanol fuel can be produced by the fermentation of Sugar

The heat of combustion of ethanol = 1366.91 kJ/mol = 29.664 kJ/g.

2CH₃OH + 3O₂  → 2CO₂ + 4H₂O  + Energy                              

The forces exerted between electric charges at a distance is evidence that each charge is surrounded by an electric field.

The forces exerted between electric charges at a distance is evidence that each charge is surrounded by an electric field.

The force exerted on an electric charge at any given distance is determined by applying coulomb's law as shown below;

\(F = \frac{kQ^2}{r^2}\)

The electric field strength of the charge is given as;

\(E = \frac{F}{Q}\)

F = EQ

where;

Thus, we can conclude that the forces exerted between electric charges at a distance is evidence that each charge is surrounded by an electric field.

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Answer: B

Explanation:

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