Compared to gases liquids can be easily compressed. True or false?

Explanation:

The air around the equator has a high temperature, so it has a _lower_____ air pressure

Answer:

2Mg+O=2MgO

Explanation:

32gram of reacting

The second row of the periodic table reflects second energy level which corresponds to 2 subshells obtained in this row.

Periodic table is arranged in rows and columns, the columns represents the group of the elements and the rows represents the energy level of the elements.

When we observe the second row of the periodic table, we will notice the following;

Thus, we can conclude that the second row of the periodic table reflects second energy level which corresponds to 2 subshells obtained in this row.

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Answer:

second row of the periodic table reflects second energy level which corresponds to 2 subshells obtained in this row.

Explanation:

At the high pressures favor the formation of diamond from graphite because according to the le chatelier principle if we increase the pressure the equilibrium will shifts to the higher density.

The synthetic diamond is formed the graphite at a very high temperature.

graphite ⇄ diamond

the density of the graphite = 2.2 g/cm³

the density of the diamond = 3.9 g/cm³

if we increase the pressure then the equilibrium will shifts to the low volume or the high density. here the density of the diamond is high than the graphite. so, equilibrium shifts towards the diamond. therefore is the condition for the graphite to convert in diamond.

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Redox is the oxidation-reduction reaction that includes the gain and loss of electrons. The oxidation of the manganese changes from +4 to +2  and gets reduced.

In a redox reaction, the electrons are gained and lost by the chemical species. In oxidation, the electrons are lost by the species to another, while in reduction the electrons are gained by the species.

When the electrons are lost by the species their oxidation number gets increased, whereas when the species gains electrons their oxidation state decreases.

The oxidation number of manganese oxide and manganese(II) chloride is calculated as:

\(\begin{aligned}\rm Mn^{x}O_{2}^{2-}: \rm x -4 &= 0\\\\&= +4\end{aligned}\)

and,

\(\begin{aligned}\rm Mn^{x}Cl^{2-}: x -2 &= 0\\\\&= +2\end{aligned}\)

Therefore, the manganese is option A. reduced, and the oxidation number changes from +4 to +2.

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When one substance melts, we just seperate the molecules. Because the temperature required to change from solid to liquid is less than the temperature needed to change from liquid to gas.

The melting point of a substance or compound is defined as the temperature at which it changes from solid state to liquid state. At the melting point, the solid and liquid state exist in the equilibrium stage. The melting point of the substance always depends on pressure.

The boiling point of a substance or compound is defined as the temperature at which it changes from liquid state to gaseous state. At the boiling point, the gas and liquid state exist in the equilibrium stage. The boiling point of the substance always depends on pressure.

As we know that,

Thus, we concluded that when one substance melts, we just seprate the molecules. Because the temperature required to change from solid to liquid is less than the temperature needed to change from liquid to gas.

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Answer:

The three main subatomic particles that form an atom are protons, neutrons, and electrons.

Explanation:

Answer:

The three main subatomic particles that form an atom are protons, neutrons, and electron

"The other halogens are not as electronegative and so other hydrogen halides cannot form hydrogen bonds between molecules. Only London Forces are formed. - Therefore more energy is required to break the intermolecular forces in HF than the other hydrogen halides and so it has a higher boiling point."

not a hack link, just stating where i got your answer from! -

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Answer:

Rocks get older as we go away from the Mid Atlantic Ridge  towards the continents

Explanation:

As the plates move away from each other, new ocean lithosphere is created at the ridge. This also widens the ocean basin and leads to sea floor spreading.

The rock of the ocean floor are symmetrically aligned and they get become older as they move away from the crest of the ridge.

Thus, rocks get older as we go away from the Mid Atlantic Ridge  towards the continents

Answer: protons

Explanation:

The nucleus contains two types of subatomic particles, protons and neutrons. The protons have a positive electrical charge and the neutrons have no electrical charge. A third type of subatomic particle, electrons, move around the nucleus. The electrons have a negative electrical charge.

False. For all atoms of the same element, the 2s orbital is not larger than the 1s orbital.

The size or spatial extent of an atomic orbital is primarily determined by its principal quantum number (n). The larger the principal quantum number, the greater the average distance of the electron from the nucleus, resulting in larger orbitals. In this case, the 2s orbital has a larger principal quantum number (n = 2) compared to the 1s orbital (n = 1), which might lead to the misconception that the 2s orbital is larger.

However, in terms of size, the 1s orbital is actually smaller than the 2s orbital. This is because the 1s orbital is closer to the nucleus, experiencing a stronger attraction and resulting in a smaller spatial distribution compared to the 2s orbital. The 2s orbital, being in a higher energy level and having a larger average distance from the nucleus, occupies a larger volume of space.

In summary, the 2s orbital is larger than the 1s orbital in terms of spatial extent and volume.

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\(NH_4OH KCl\ < - > \ KOH NH_4Cl.\)

This chemical reaction represents an acid-base reaction. The correct answer is (b)

In this reaction, ammonium hydroxide acts as a weak base, while potassium hydroxide acts as a strong base. Hydrochloric acid (HCl) is a strong acid, and ammonium chloride (\(NH_4Cl\)) is a salt formed from the reaction between an acid and a base. The reaction involves the transfer of a proton (H+) from the ammonium hydroxide to the chloride ion. This proton transfer characterizes an acid-base reaction, where a base (\(NH_4OH\)) accepts a proton from an acid (HCl), resulting in the formation of the salt \(NH_4Cl\) and water (\(H_2O\)) as a product. Hence, the correct answer is (b).

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The pressure 10.0m under water is 199kpa. This pressure in atm is 1.96atm.

It's important to keep in mind that an atmosphere is the average pressure that the atmosphere exerts at sea level.

You are aware that the definition of pressure is "force per unit of surface."  1 pascal, or 1Pa, of pressure results from exerting a force of 1N on a surface measuring one square meter. 1 kilopascal, or kPa, is equal to precisely 1000 Pa. You require precisely 101.325 kPa to obtain a pressure of 1 atmosphere, or 1 atm. This indicates that you will experience pressure that is similar to:

199kPa x 1atm /  101.325 kPa = 1.96atm.

Hence the required pressure at 10m underwater is 1.96atm.

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Answer:

Normal Acivity

Explanation:

Answer:

Noble gases are not reactive at all since they are stable. 2. I dont think so.

Explanation:

Look at the answer

Answer:

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Explanation:

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The chemical equation is balanced

The chemical equation is said to be balanced if the number of atoms in the reactants and the number of atoms in the product is the same.

Balancing the equation can be done by adjusting the reaction coefficients in the products and reactants and not changing the chemical formula

This method can be done by balancing each atom first by giving a coefficient of 1 on the most complex compound

Reaction

\(\tt 4Al+3O_2\Rightarrow 2Al_2O_3\)

To check if this equation is balanced, take a look at the number of each of the atoms in the products and reactants

Because the number of atoms is the same, it can be said that the chemical equation above is balanced

Answer:Metals have a less likely chance to gain electrons because it is easier to lose their valance electrons and form cations. It is easier to lose their valence electrons because metals' nuclei do not have a strong pull on their valence electrons. Thus, metals are known to have lower electron affinities

Explanation:

hope this helps

Both equations demonstrate the amphoteric nature of \(H_2PO_4^-\), as it can act as both an acid and a base depending on the nature of the other species involved in the reaction.

Part A:

\(H_2PO_4^- (aq) + H_2O (l) -- > H_3O^+ (aq) + HPO_4^{2-} (aq)\)

In this equation, \(H_2PO_4^-\) acts as an acid by donating a proton (H⁺) to water (\(H_2O\)), which acts as a base. The result is the formation of hydronium ion (\(H_3O^+\)) and the conjugate base, \(H_2PO_4^-\).

Part B:

\(H_2PO_4^- (aq) + H_2O (l) < -- > OH^- (aq) + H_3PO_4 (aq)\)

In this equation, \(H_2PO_4^-\)⁻ acts as a base by accepting a proton (H⁺) from water (\(H_2O\)), which acts as an acid. The result is the formation of hydroxide ion (OH⁻) and the conjugate acid, \(H_3PO_4\).

Water, being a neutral molecule, can act as both an acid and a base, depending on the reaction conditions.

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The mole fraction of carbon dioxide in the mixture is

P(CO₂) = 0.00004 × 76mmHg

           = 0.304mmHg

The key to this problem is the fact that each component of a gas mixture contributes to the total pressure exerted by the mixture in proportion to the number of molecules in the mixture.

Partial pressures of gases are most often expressed as mole fractions.

                    P(gas) = χ(gas) × P(mixture)

This is the proportional to the number of molecules.

As you know, 1 mole of a substance is exactly 6.022⋅10²³

molecules of that substance. This is known as the Avogadro number Nₐ.

This means that the number of molecules, say x and Avogadro's number

No. can be used to express the number of moles of a gas.

             From a mole =  Number of Molecules × Nₐ

Now, the percentage composition of a gas mixture is the number of molecules each gas contributes to 100 molecules of the mixture.

In this case, the air must contain 0.04% carbon dioxide. This means that there are 0.04 CO₂ molecules in 100 air molecules.

For example, the number of moles of carbon dioxide in 100 air molecules is ⁿCO² = 0.04 molecules × Nₐ

            = 0.04 Nₐ

This air sample is

n (total) = 100 molecules × Nₐ

            = 100⋅Nₐ

This means that the mole fraction of carbon dioxide in the mixture is

P(CO₂) = 0.00004 × 76mmHg

           = 0.304mmHg

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Answer:

8.24 mL

Explanation:

Density can be defined as mass per unit volume, according to the relationship shown in the attached image. Moles (a unit of measurement for small entities) can also be related to mass. Let's look at two formulas which would be useful for answering this question.

\(\boxed{\text{Density}=\frac{\text{Mass}}{\text{Volume}} }\)

\(\boxed{\text{Mole}\times\text{Mr}=\text{Mass (in grams)}}\) , where Mr stands for relative molecular mass

From the periodic table the Mr of nickel is 58.7.

Multiply the number of moles by the Mr:

Mass of Ni

= 1.25(58.7)

= 73.375 g

Calculate the volume of Ni:

Volume

= mass ÷density

= 73.375 ÷8.90

= 8.24 ml (3 s.f.)

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Answer:

D: Iron and sulfur react to form iron sulfide.

Explanation:

To make iron sulfide you need to combined Iron and Sulfur atoms, producing a chemical reaction.

Answer:

The only difference is that ozone is made up of three oxygen atoms, while the stuff we breathe (molecular oxygen) is made up of only two atoms. Solar rays high in the atmosphere convert O2 to O3. In the upper atmosphere, rays from the Sun break a normal oxygen molecule into two separate oxygen atoms.

The term "the strong nuclear force must be strong enough to overcome the repulsive force of protons, not electrons" describes the error in her chart. An atom is made up of three particles; electrons, protons, and neutrons. Electrons have a negative charge and protons have a positive charge.

Because protons are in such close proximity, there is a strong repulsive force between them which is why it’s surprising that atomic nuclei can exist. The force that binds protons and neutrons together is known as the strong nuclear force. It has a very short range, which is why it only affects particles that are extremely close together. Despite this, the strong nuclear force is strong enough to overcome the repulsive force of protons, allowing for stable atomic nuclei to exist.

However, the statement "the strong nuclear force must be strong enough to overcome the repulsive force of protons, not electrons" is wrong. Electrons aren't held together by the strong nuclear force because they orbit the nucleus and are attracted to the positively charged protons by the electromagnetic force. Therefore, the strong nuclear force must be strong enough to overcome the repulsive force between protons, not electrons.

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The glucose chain breaks at the carbon 1 and carbon 4 positions to change to its cyclical form.

Glucose can exist in both linear and cyclic forms. In its linear form, it exists as a six-carbon chain with an aldehyde group at one end and a hydroxyl group at the other end. However, glucose can also exist in a cyclic form, where the aldehyde group reacts with one of the hydroxyl groups on the same chain to form a hemiacetal. This results in a five-membered ring structure known as a furanose. The cyclic form of glucose can exist in two different configurations, known as alpha and beta. These configurations differ in the orientation of the hydroxyl group at the anomeric carbon, which is the carbon that was involved in the reaction to form the cyclic ring. The alpha configuration has the hydroxyl group pointing downward, while the beta configuration has the hydroxyl group pointing upward. The break in the glucose chain that is necessary to form the cyclic structure occurs at the carbon 1 and carbon 4 positions. Specifically, the hydroxyl group on carbon 4 reacts with the aldehyde group on carbon 1 to form the hemiacetal ring. The resulting cyclic structure can then exist in either the alpha or beta configuration, depending on the orientation of the hydroxyl group at the anomeric carbon.

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The number of electrons in a neutral atom equals the number of atomic number.

If the ion is positively charged, the number of electrons is calculated by subtracting the charge number from the atomic number.

If the ion is negatively charged, the number of electrons is calculated by adding the charge number to the atomic number.

Electrons are subatomic particles that, along with protons and neutrons, make up the most fundamental component of atoms. For a long time, the atom was thought to be the final structure of an element. The term 'atom' is entirely representative of that thought because it comes from the Greek word for indivisible.

All of that changed in 1897, when the English physicist J.J. Thomson discovered electrons as part of subatomic particles, i.e., particles that make up the atom, using his now-famous cathode ray tube experiments.

According to Dalton's atomic theory, atoms are the smallest particles of an element that have the same properties as the element and can never be created or destroyed.

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The number more electrons contained within an atom is equal to the atomic number of a substance for neutrally charge carrier. This shows that a material's protons and electrons are distributed equally.

For instance, what precisely are electrons?

The smallest component of an atom, the electron, has a negative charge. An atom has an equal amount of electrons and protons in its neutral state. One hydroxyl group and first photon make up this same hydrogen bond.

Where are protons and neutrons?

The subatomic particles that constitute an atom are the elementary particle, proton, and neutron. An atom is made up among its core nucleus, which is composed of protons and neutrinos. the nucleus's surrounding electrons. Protons bear a positive charge, whereas electrons contain a negative charge.

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Answer:

Light gates

Explanation:

Light gates are used because of their accuracy. They can be set to react very quickly when the beam is broken which eliminates human reaction time errors.

Answer:There are three subatomic particles: protons, neutrons and electrons. Two of the subatomic particles have electrical charges: protons have a positive charge while electrons have a negative charge. Neutrons, on the other hand, don't have a charge.

Explanation: