How does the radius of a nitrogen ion with a −3 charge compare to that of neutral nitrogen?

Answer:The density of an object is 8.54 g/mL

Explanation:

Answer:B

Explanation:

Answer:

Hydrogen ion concentration is 2.773E-4Mole per DM3

Hydroxide ion concentration is 4.093E-11

It is an acid

Explanation:

PH(H3O)=-LogH3O

PH=3.557

H3O=antilog of -3.557

antilog of -3.557=antilog (0.443 -4)

antilog0.443 ×antilog -4=2.773E-4mole per DM3.

(H3O)(OH)=10^-14

H30=2.773×10^-14

OH= 1.00E-14/2.773E-4

=4.093E-11

it is an acid since the concentration of hydrogen ion is more than the hydroxide ion

Answer:

[tex]3.606\times 10^{-11} M[/tex] is the hydrogen ion concentration.

0.0002773 M is the hydroxide ion concentration.

The solution has pH value more than 7 which means that it is base.

Explanation:

The pH of the solution is defined as negative logarithm of hydrogen ions concentration in a solution. Lower the value of pH more acidic will the solution.

Mathematically written as:

[tex]pH=-\log[H^+][/tex]

The pOH of the solution is defined as negative logarithm of hydroxide ions concentration in a solution. Lower the value of pOH more alkaline will the solution.

Mathematically written as:

[tex]pOH=-\log[OH^-][/tex]

The sum of ph and pOH is equal to 14.

pH + pOH = 14

We have:

Solution with pOH = 3.557

The pH of the solution = 14 - pOH = 10.443

[tex]pH=-\log[H^+][/tex]

[tex]10.443=-\log[H^+][/tex]

[tex][H^+]=3.606\times 10^{-11} M[/tex]

[tex]3.606\times 10^{-11} M[/tex] is the hydrogen ion concentration.

[tex]pOH=-\log[OH^-][/tex]

[tex]3.557=-\log[OH^-][/tex]

[tex][OH^-]=0.0002773 M[/tex]

0.0002773 M is the hydroxide ion concentration.

The solution has pH value more than 7 which means that it is base.

Answer:

Temperature is a measure of the kinetic energy of particles in a substance. As temperature increases, the atoms or molecules in a substance gain energy. As temperature decreases, the particles lose energy. A change in the energy of particles causes a change in their arrangement. A change in the arrangement of particles can lead to a physical change.

Explanation:

edge 2023

Answer: 62g

Explanation: You add 24g and 38 grams because when a substance reacts with another substance there is the same amount of grams in the product, so there would be 62 grams in the product because that is the amount of grams there is in the reactants.

In a chemical reaction, 24g of magnesium reacts with 38g of fluoride to yield 62g of magnesium fluoride according to stoichiometry principles.

The question refers to a stoichiometry problem in chemistry related to the reaction of magnesium and fluoride to produce magnesium fluoride. Stoichiometry is the calculation of relative quantities of reactants and products in chemical reactions. Using the balanced equation for the reaction of magnesium and fluoride:

Mg + F2 → MgF2

In this reaction, one mole of magnesium reacts with one mole of fluorine to produce one mole of magnesium fluoride. Given the atomic masses (Mg = 24 g/mol, F =19 g/mol, MgF2 = 62 g/mol), this reaction signifies that 24g of Magnesium will react with 38g of Fluoride to produce 62g of Magnesium Fluoride. Therefore, the question's accurate answer is: 24g of magnesium reacts with 38g of fluoride to produce 62g of magnesium fluoride.

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Answer:

C. mobile electrons in the copper can shift without disrupting the solid

Explanation:

Most of the properties of metals results from the metallic bonds between atoms of the metals. The bond forms from the attraction between the positive nuclei of all the closely packed atoms in the lattice and the electron cloud jointly formed by the atoms losing their outermost shell electrons due to their low ionizatin energy.

This is not so in ionic solids.

Answer:

I think its higher

Explanation:

When an atom with 9 protons loses 2 electrons, it becomes a cation with a +2 charge. If it instead gains 4 electrons, it becomes an anion with a -4 charge.

Initially, an atom with 9 electrons and 9 protons is electrically neutral because the negative charges of the electrons perfectly counterbalance the positive charges of the protons. When an atom loses electrons, it becomes more positively charged or forms a cation.

Specifically, if it loses 2 electrons, it will have 7 electrons and 9 protons, resulting in a net charge of +2 as the calculation is 9 protons - 7 electrons = +2. This is represented as 2+.

Conversely, when an atom gains electrons, it becomes more negatively charged or forms an anion. If the atom gains 4 electrons to have 13 electrons and 9 protons, the net charge would be -4, since the calculation here is 9 protons - 13 electrons = -4. This is represented as 4-.

Therefore, the net charge will be -4.

Hello There!

Your Answer is that “heat causes the gas particles in the can to move faster and farther apart.”

An aerosol is a tiny liquid or solid particle that is suspended in the atmosphere.

Answer: Boyle's Law states if the temperature of gas remains the same, adding pressure will decrease the volume of the gas.

Explanation: The assumptions of Boyle's law basically states that if the temperature is constant, pressurizing the gas will cause a decrease in the overall volume of the gas.

The law can be represented with the following equation:

P1 x V1 = P2 x V2

Boyle's law can calculate the volume of a gas after it undergoes a pressure change. For example, if the volume of a gas is equal to 2.2 liters at a pressure of 1.3 atm, what happens to the volume of the gas if the pressure is decreased to 0.75 atm? You can determine that after plugging in the values into the equation.

1.3 atm x 2.2 L = 0.75 x V2

Next, multiply 1.3 atm by 2.2 L. Then, divide both sides of the equation by 0.75 to get 3.81, which can be rounded to 3.8. The answer is 3.8 L = V2.

So, this shows that when the pressure is decreased, the volume increases. The relationship between pressure and volume is inversely proportional, and the opposite would happen if the pressure was increased.

If you had a balloon, the gas molecules inside would be constantly in motion, and all spaced out. However, if the balloon was put under pressure, the molecules would become more closely packed together as the space decreased inside. So, according to Boyle's Law, the volume inside the balloon would decrease due to the pressure increasing if the temperature is constant.

According to Boyle's law, the pressure of an ideal gas increases with a decrease in the volume of the container at a constant temperature.

Pressure is inversely proportional to volume.

The assumptions made in the law are that the temperature and number of moles of gases or amount of gas within a closed system are constant.

                                                 PV = k

P is the pressure of the gas

V is the volume of the gas in the container

k is constant

We can calculate pressure and volume using Boyle's law.

The balloon is inflated with air, and as the air pressure presses on the rubber, the balloon expands. The balloon's unsqueezed portion will expand outward if one end is squeezed, reducing the volume and increasing pressure inside.

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Answer:

evidence from an experiment be explained in her relationship to the hypothesis as an inference

Answer:

C

Explanation:

Answer: C. A thoroughly tested and widely accepted explanation. Explanation: A scientific theory is a coherent statement or set of ideas that explains observed facts or phenomenon and are thoroughly tested and widely accepted.

A mixture of saltwater can be separated into salt and water through a process called "evaporation." Evaporation exploits the differences in boiling points between water and salt, allowing the components to be separated.

Here's how you can do it:

Start with the mixture of saltwater in a container. The salt is dissolved in the water.

Apply heat to the container. You can do this by placing the container on a stovetop or using an open flame. As the temperature rises, the water will begin to evaporate.

The water will change from its liquid state into water vapor (a gas) due to the heat. This water vapor will rise and leave the container, leaving behind the solid salt particles.

Continue heating until all the water has evaporated. The salt will be left behind in the container.

Once the evaporation process is complete, allow the container to cool. The salt will remain in its solid form, ready for use.

It's crucial to remember that this technique works best when separating dissolved salt from water. A alternative technique, such as filtering, would be needed if you want to separate salt from water in a solution where the salt has not yet dissolved (such as sand and seawater). The evaporation technique is straightforward, however it might not be effective for large-scale separation processes. In these circumstances, more sophisticated methods like distillation may be used.

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Final answer:

Salt and water can be separated through distillation, which uses their different boiling points, or through evaporation, which utilizes the sun's heat to leave behind salt crystals as water evaporates.

Explanation:

Separation of Salt and Water

To separate a mixture of salt and water, you can use physical methods such as distillation. Distillation exploits the difference in boiling points between the two substances. In this process, the saltwater is heated until the water boils and turns into vapor. The water vapor then condenses in a cooler part of the apparatus, often a condenser, and can be collected as pure water in a receiving flask. The salt, not having a vapor phase at the boiling point of water, remains in the original container.

Another method that can be used to separate salt from water, especially on a large scale, is evaporation. Large shallow ponds, often referred to as salt gardens, are used to expose saltwater to the heat of the sun. As the water evaporates, salt crystals are left behind, which can then be collected and further purified if necessary. These methods are practical, but the choice of method depends on the desired purity and the quantity of water and salt to be separated.

Answer:

The PV of products will be constant.

Explanation:

Ideal gas equation-   PV = nRT

where P is pressure of gas, V is volume of gas, n is number of moles of gas, R is gas constant and T is temperature (in Kelvin) of gas.

Now, number of moles of a gas remain constant with change in state variables.

So, if T is constant then the term "nRT" remins constant.

As PV is equal to nRT therefore PV will be constant if temperature is held constant.

In another way we can say if P is increased then V will decrease or vice versa.

Answer:

Be Constant

Explanation:

Option D, They react in similar ways.

The Nitrogen family consists of five elements, which start with nitrogen on the periodic table and move down the group or column:

Bismuth Nitrogen family elements consists of atoms having 5 electrons in their outer energy level. Two of the electrons are in the s subshell, with 3 unpaired electrons in the ​p subshell.

As you move down the nitrogen family: atomic radius increases, ionic radius increases, ionization energy decreases, and electronegativity decreases.

Nitrogen family elements often form covalent compounds, usually with the oxidation numbers +3 or +5.

Nitrogen and phosphorus are nonmetals. Arsenic and antimony are metalloids. Bismuth is a metal.

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Answer:

It's the percent ratio of actual yield to the theoretical yield.

Explanation:

Theoretical yield is the calculated yield using the balanced chemical reaction. Actual yield is what is actually obtained in a chemical reaction. Percent yield is a comparison of the actual yield with the theoretical yield.

To compute the percent yield, it is first necessary to determine the theoretical yield, which is the maximum amount of product that could be formed from the given amounts of reactants. The theoretical yield is calculated based on the stoichiometry of the chemical equation. The actual yield, on the other hand, is what is actually obtained in a chemical reaction when it is carried out in the laboratory. The percent yield is then determined by calculating the ratio of the actual yield to the theoretical yield, multiplied by 100 to give a percentage.

Answer:

Explanation:

Molarity of acid(volume of acid)(# of H ions)= molarity of base(volume of base)(# of OH ions)

M(v)(#)=M(v)(#)

sulfuric acid    sodium hydroxide

H2SO4           NaOH

(3)(11.6)(2)=M(25)(1)

M=2.784

The molarity of the NaOH solution is 2.784 M

We'll begin by writing the balanced equation for the reaction.

From the balanced equation above,

The mole ratio of the acid, H₂SO₄ ([tex]n_{a}[/tex]) = 1

The mole ratio of the base, NaOH ([tex]n_{b}[/tex]) = 2

From the question given above, the following data were obtained:

Volume of acid, H₂SO₄ ([tex]V_{a}[/tex]) = 11.6 mL

Molarity of acid, H₂SO₄ ([tex]M_{a}[/tex]) = 3 M

Volume of base, NaOH ([tex]V_{b}[/tex]) = 25 mL

[tex]\frac{M_{a} V_{a}}{M_{b} V_{b}} = \frac{n_{a}}{n_{a}}\\\\ \frac{3 (11.6)}{M_{b} (25)} = \frac{1}{2}\\\\[/tex]

[tex]M_{b}[/tex] × 25 × 1 = 3 × 11.6 × 2

[tex]M_{b}[/tex] × 25 = 69.6

[tex]M_{b} = \frac{69.6}{25}\\ M_{b} = 2.784 M[/tex]

Therefore, the molarity of the NaOH solution is 2.784 M

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Answer:All of them

Explanation:

Answer: The correct answer is all of them!

Explanation:

Looked at my lesson after seeing mixed answers and the correct answer is all of them!

The uncontrolled expansion of a gas into a vacuum is an example of a free expansion of a gas. Therefore, the correct option is option D.

These really are adiabatic processes where no heat is transferred between both the system and its surrounding environment and therefore no work is performed on or by the system. These adiabatic processes are known as free expansion. A gas expands inside an enclosed evacuated chamber in an irreversible process.

It is also known as Joule expansion. The temperature of an ideal gas does not fluctuate (see Joule's Second Law), whereas actual gases suffer temperature changes during free expansion. Q = W = 0 in free expansion. The uncontrolled expansion of a gas into a vacuum is an example of a free expansion of a gas.

Therefore, the correct option is option D.

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Final answer:

A free expansion of a gas occurs when it expands into a vacuum, such as when gas confined in a flask fills up an adjoining vacuum flask upon opening a valve between them, increasing the entropy of the system without performing any work on its surroundings.

Explanation:

An example of a free expansion of a gas is the uncontrolled expansion of a gas into a vacuum. This process, also referenced as a macroscopic example of a particle-in-a-box model, involves a gas initially confined to one of two flasks. When a valve between the flasks is opened, the gas expands to fill the available volume in both flasks. This spontaneous expansion leads to an increase in the entropy of the system. Unlike scenarios where a gas expands as it heats up or performs work by pushing against the containers' walls, the unique characteristic of a free expansion is that it occurs without the gas performing any work on its surroundings and without a change in energy due to heat transfer.

The atoms in a gas move at high speeds.

The atoms in a gas spread in all directions.

A gas is a sample of matter that conforms to the shape of a container in which it is held and acquires a uniform density inside the container, even in the presence of gravity and regardless of the amount of substance in the container.

Gas is one of the three main states of matter.

Gas is made up of atoms, tiny particles that makeup molecules, and molecules that move faster and further away as compared to other states of matter, which enables gas to fill a container evenly.

Hence, the atoms in a gas move at high speeds and the atoms in a gas spread in all directions.

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Final answer:

Gases consist of atoms that move at high speeds and spread in all directions, filling the volume of their container. They have no definite shape or volume and can be easily compressed or expand.

Explanation:

When considering the properties of gases, it's important to recognize several key characteristics that describe their behavior:

Therefore, the statements that best describe gases are:

Answer:

D. 27.099 x 10²³.

Explanation:

So, 4.5 mol of Hg will contain:

(4.5 mol)(6.022 x 10²³) = 27.099 x 10²³ atoms.

So, the right choice is: D. 27.099 x 10²³.

Answer: [tex]27\times 10^{23}[/tex]

Explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles.

1 mole of [tex]Hg[/tex] contains = [tex]6.023\times 10^{23}[/tex] atoms of mercury

Thus 4.5 moles of [tex]Hg[/tex] contains = [tex]\frac{6.023\times 10^{23}}{1}\times 4.5=27.099\times 10^{23}[/tex] atoms of mercury

Thus the number of atoms in 4.5 moles of mercury are [tex]27\times 10^{23}[/tex] atoms of mercury.

Answer:

D. Energy is absorbed in an endothermic reaction

Explanation:

In all cases, an endothermic reaction is one in which is absorbed from the surroundings for the reaction to take place. After the reaction, the surrounding becomes colder as heat is drawn from it to furnish the reaction.

It is in an exothermic reaction that heat is liberated to the surroundings and this makes the surrounding hotter at the end of the reaction.

In some reactions, when bonds are broken, they can release energy and they can also absorb energy.

Answer:

D

Explanation:

Energy is absorbed in the form of heat

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Hello! Your answer would be a gain of electrons and a decrease in positive charge.

Contrary to how it sounds, reduction is actually a gain of electrons. It is part of a set of reactions known as a redox reaction, reduction being a gain of electrons and oxidation being a loss.

With the gain of electrons, the element would become more negative as electrons bring with them a negative charge. Therefore, this would decrease the positive charge.

Hope this helped!

Answer:

I believe that the answers are:

1) loss

2) increase

Answer:

Here's what I get.

Explanation:

Bottom line: ask your teachers in advance what they expect.

Answer:

IRON NAIL

Explanation:

Answer:

B.) Iron nail

Explanation:

I took this quiz, k12 8th grade

Best of luck deary...<3

Best of luck to all future comers...<3

Answer:

Sugar

Explanation:

Defintion of a solute-dissolved in the solvent, sugar dissolves in water and is therefore the solute

That would be solute.

A solute is the one that gets dissolved in the solvent. Here the solute is sugar and the solvent is water.

Answer:

A. Visible light waves.

Answer: A Visible light waves

Explanation:

Electromagnetic wave is defined as the wave which is associated with both electrical and magnetic component associated with them. They can travel in vacuum as well and travel with the speed of light.

The Electromagnetic spectrum involves gamma rays , X rays, ultra violet rays, visible rays, infrared rays, micro waves and radio waves which are arranged in order of increasing wavelength and decreasing frequency.

Visible region consists of violet, indigo, blue, green, yellow, orange and red light and they have wavelengths which are visible to naked eyes.

Answer:

The answer id D. on EDGEN.

Explanation:

D. He should divide 338.25 by 1000.

He should divide 338.25 by 1000. Hence, option D is correct.

Energy is the capacity for doing work. It may exist in potential, kinetic, thermal, electrical, chemical, nuclear, or other forms.

To convert a joule measurement to a kilojoule measurement, divide the energy by the conversion ratio.

The energy in kilojoules is equal to the joules divided by 1,000.

[tex]\frac{338.25 J}{1000}[/tex]

= . 33825 kJ

Hence, .33825 kJ is the energy when we convert 338.25 J to kJ.

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Answer:

2AgCl == 2Ag + Cl2

Explanation:

when a white colour salt silver chloride is placed in a sunlight in a watch glass decomposition by sunlight takes place and this type of reaction is takes place when a single compound breaks down into two or more reactants name the energy is supplied in the form of Sunlight the following is the chemical equation for for this reaction

2AgCl == 2Ag + Cl2

Answer:

When white silver chloride is exposed to sunlight, thermal energy excites the silver atoms which appears in flakes and it is black in colour which overtime spreads over to the silver chloride which is white in colour and turns it grey.

This reactions with sunlight dissociate the silver atoms into silver metals and chlorine molecule and it's called PHOTOCHEMICAL REACTION, since its requires energy in form of light to be initiated. Silver chloride are kept in amber bottles away from sunlight so as to prevent this decomposition.

Sunlight

2AgCl —————》 2Ag + Cl2

Answer:

Steel is bonded together by a metallic bond.

Explanation:

There is attractions in the bond, Steel has negative electrons and positive ions, which attract each other. They hold the structure together thus forming a metallic bond.