Which statement is also true of the rearrangement of atoms

Answer:

-Aluminum Oxide: The cation is Al3+ and the anion is O2-. The sum of the charges for aluminum oxide is 2(3+) + 3(2-) = 0. Thus, the formula is Al2O3. An ionic compound is named using the name of the cation followed by the name of the anion, eliminating the word ion from each.

Explanation:

Answer:

Two positive aspects of using methane recapture systems are able to generate significant electricity. Another benefit is that the process of anaerobic digestion creates heat that can be used to warm buildings where animals are kept

Answer:  The correct answer is;

Two positive aspects of using methane recapture systems include lowering the impact on greenhouse gasses and the production of energy. Methane is a very potent greenhouse gas that is contributing to global warming. As a result, the recapturing process reduces the methane impacts of global warming by reclaiming and reusing the gas for other purposes. Recaptured methane can be stored and used to generate electricity or used as fuel to power updated vehicles and other engines on the farm. The overall benefits from this combination are reducing impacts causing global warming and lower the cost of electricity or fuel on the farm.

Explanation:  This answer has been confirmed correct.

3.59 mol

1.836 x 10 ²⁵ molecules

Given

230 g SO2

30.5 moles LiNO3

Required

moles and molecules

Solution

mol = mass : molar mass

1 mol = 6.02 x 10²³ particles(molecules, atoms, ions)

1. 230 g x 1 mol/64,066 g  =3.59 mol

2. 30.5 moles x 6.02 x 10 ²³ molecules / 1 mol = 1.836 x 10 ²⁵ molecules

The idea here is that you need to figure out how many moles of magnesium chloride,

MgCl

2

, you need to have in the target solution, then use this value to determine what volume of the stock solution would contain this many moles.

As you know, molarity is defined as the number of moles of solute, which in your case is magnesium chloride, divided by liters of solution.

c

=

n

V

So, how many moles of magnesium chloride must be present in the target solution?

c

=

n

V

⇒

n

=

c

⋅

V

n

=

0.158 M

⋅

250.0

⋅

10

−

3

L

=

0.0395 moles MgCl

2

Now determine what volume of the target solution would contain this many moles of magnesium chloride

c

=

n

V

⇒

V

=

n

c

V

=

0.0395

moles

3.15

moles

L

=

0.01254 L

Rounded to three sig figs and expressed in mililiters, the volume will be

V

=

12.5 mL

So, to prepare your target solution, use a

12.5-mL

sample of the stock solution and add enough water to make the volume of the total solution equal to

250.0 mL

.

This is equivalent to diluting the

12.5-mL

sample of the stock solution by a dilution factor of

20

.

Sodium is a metal that belongs to group 1 of the periodic table.

My favorite element is sodium. Sodium is found in group one of the periodic table. The element is univalent and also forms univalent positive ions. Like every other metal, sodium is able to react with dilute acids to liberate hydrogen gas.

Sodium is a light metal and is known to react with mercury to form the sodium mercury amalgam which is obtained during the electrolysis of sodium chloride. All of the compounds that are formed by sodium are ionic in nature. However the hydrides of sodium are unstable.

Sodium is highly reactive thus it must not be exposed to air since it could ignite spontaneously in air. As such, sodium must be stored under paraffin oil. All the compounds of sodium are ionic in nature.

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Answer:48

Explanation:

Answer:  3. 0.125 X 10”23 molecules

Explanation:

Two moles or 36 g of water on decomposition gives 32 grams of oxygen gas. Then 494 g of water will give 439.1 g of oxygen.

The decomposition is a type of reaction in which a single compound breaks into its constituent elements or molecules. Water molecules are formed by the combination of hydrogen and oxygen atoms.

Decomposition of two moles of water  decompose to give 2 moles of hydrogen gas and one mole of oxygen gas.

molar mass of water = 18 g/mol

molecular mass of oxygen  = 32 g/mol

Two moles or 36 g of water gives one mole or 32 g of oxygen gas. Then mass of oxygen produced by 494 g of water is :

(494 ×32)/36 g = 439 g

Therefore, 439 g of oxygen gas is formed by the decomposition of 494 g of water.

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The chemical shift of the proton from TMS is 3.112 Hz.

Generally, The chemical shift of a proton from TMS (tetramethylsilane) in Hz can be calculated as follows:

δ (in Hz) = δ (in ppm) x (frequency in MHz) / 10^6

Plugging in the values, we get:

δ (in Hz) = 7.78 ppm x (400 MHz) / 10^6 = 3.112 Hz

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Option C, which involves adding 0.050 moles of HCl, causes the buffer to be destroyed. It is a mixture of salt and a weak acid. In this case, the buffer will eventually destruct.

during which neither NaC2H3O2 nor HC2H3O2 should be present in the solution. Equivalent amounts of HCl and NaC2H3O2 are added and react together. The solution will solely contain acid as a result. An aqueous solution is a buffer solution. It also comprises of a mixture of a weak acid and its conjugate base, or the other way around. In the discipline of chemistry, this solution is quite significant. Here, you may learn more about buffer solutions. Undoubtedly, an acid and a base are present in a buffer solution.

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The complete question is-

A 1.0 L buffer solution is 0.250 M HC2H3O2 and 0.050 M LiC2H3O2. Which of the following actions will destroy the buffer?

A. adding 0.050 moles of NaOH

B. adding 0.050 moles of LiC2H3O2

C. adding 0.050 moles of HC2H3O2

D. adding 0.050 moles of HCl

E. None of the above will destroy the buffer.

Answer:

electrolysis is the process by which electric current is passed through a substance to effect a chemical change

Answer:

See explanation

Explanation:

Carboxylic acids are all soluble in solutions of NaOH, Na2CO3 and NaHCO3 due to the formation of a sodium salt of the acid.

In all these cases, the sodium salt of cyclohexanecarboxylicacid formed is more soluble in water than the parent acid.

When the acid is dissolved in sodium bicarbonate or sodium carbonate, carbon dioxide gas is also evolved.

Answer:

double bond

Explanation:

Sometimes two covalent bonds are formed between two atoms by each atom sharing two electrons, for a total of four shared electrons. For example, in the formation of the oxygen molecule, each atom of oxygen forms two bonds to the other oxygen atom, producing the molecule O2. Similarly, in carbon dioxide (CO2), two double bonds are formed between the carbon and each of the two oxygen atoms

Change in temperature when quicklime reacts with water.

When ice cubes are separated from the freezer and conducted to room temperature, they turn into a liquid. This temperature is the boiling point of water. Heat makes water molecules move fast. Cooling air causes water vapor to change to a liquid. Water changes rapidly into a gas when water is heated to a temperature of 100 degrees Celsius or 212 degrees Fahrenheit.

When energy is free in an exothermic reaction, the temperature of the reaction mixture increases. When energy is soal up in an endothermic reaction, the temperature decreases.

So we can conclude that Some chemical reactions are distinguished by changes in temperature.

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The bulk density at 20 percent moisture, given that the soil dries to 20 percent by weight is 1.4 g/cm³

First, we shall obtain the initial volume of the soil. Details below:

Volume = mass / density

Initial volume of soil = 100 / 1.3

Initial volume of soil = 76.93 cm³

Next, we shall obtain the volume after the soil dries to 20 percent by weight. Details below:

We were told that the soil shrinks by an amount equal to the water loss, thus we have

Initial mass of water = 40% = 40 g

Water lost = 20% = 20 g

New mass of water = 40 - 20 = 20 g

Thus,

Volume = Equal value of mass of water lost = 20 cm³

Finally, we shall obtain the bulk density at 20 percent moisture. Details below:

Bulk density at 20 percent moisture = Total mass / new volume

Bulk density at 20 percent moisture = 80 /  5.93

Bulk density at 20 percent moisture = 1.4 g/cm³

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Answer:

the answer is

2,1,1,1

Explanation:

the bond angle is 90° since it's a tetrahedral shape.

Each oxygen (O) atom has 6 valence electrons, and sulfur (S) also has 6 valence electrons.

The sulfate ion has four oxygen atoms, so we multiply that number by those atoms' valence electrons to get the following result: 24 valence electrons (4 x 6). When we add the sulfur valence electrons (six) to the total number of oxygen valence electrons (24), we get a total of 30 valence electrons.

We count the number of electron domains (bonding pairs and lone pairs) surrounding the primary atom to establish the electron-domain geometry. In this example, the lead atom is sulfur (S). There is no single pair; Instead, there are four bond pairs (two SO double bonds and two SO single bonds). As a result, the shape of the electron domains is tetrahedral.

The positions of the atoms, not their lone pairs, are used to establish molecular size. The molecular geometry of sulfate ion is also tetrahedral. By counting the number of electron domains, it is possible to establish the degree of hybridization of the primary atom (sulfur, S). Sulfur is surrounded by a four electron domain, so the hybridization is \(sp^3\). When it comes to bond angles, the S-O bonds of sulfate ion are separated by about 109.5 degrees.

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Answer:

study....................

Explanation:

1.Short sessions

2.Sleep well

3.Set goal

4Aim to learn as if you were to teach

Answer:  The boiling point of water will decrease as the altitude increases since atmospheric pressure decreases at higher altitudes.

Explanation:

At 8,000 meters above sea level, the air pressure is lower than one atmosphere and the equilibrium between air pressure and water will be attained. As the atmospheric pressure continues to decrease, the boiling point of water drops by approximately  1°C for every additional 300 meters.

The mass of chlorine gas product formed is 61.4 g.

What is the mass ?

First, we need to determine which reactant is limiting and which is in excess. To do this, we can use the given mass of HCl and convert it to moles:

63.2 g HCl × (1 mol HCl/36.46 g HCl) = 1.73 mol HCl

Next, we can use stoichiometry to determine how many moles of \(Cl_{2}\) will be produced from 1.73 mol of HCl:

1.73 mol HCl × (2 mol \(Cl_{2}\)/4 mol HCl) = 0.865 mol \(Cl_{2}\)

Finally, we can convert the moles of \(Cl_{2}\) to grams using its molar mass:

0.865 mol \(Cl_{2}\) × (70.91 g \(Cl_{2}\)/1 mol \(Cl_{2}\)) = 61.4 g \(Cl_{2}\)

Therefore, the mass of chlorine gas product formed is 61.4 g.

What is stoichiometry ?

Stoichiometry is a branch of chemistry that deals with the calculation of the quantities of reactants and products involved in a chemical reaction. It involves using balanced chemical equations to calculate the amounts of reactants required to produce a certain amount of product, or the amount of product that can be obtained from a given amount of reactant. Stoichiometry is an important tool for predicting the outcomes of chemical reactions and for designing chemical processes in industry.

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Answer:

\(P=3.33atm\)

Explanation:

Hello!

In this case, since know the volume, temperature and pressure of the initial containers, we can compute the moles of each gas prior to the opening of the valve as shown below:

\(n_{Ne}=\frac{6atm*4L}{0.08206\frac{atm*L}{mol*K}*298.15K} =0.981molNe\\\\n_{Ar}=\frac{2atm*8L}{0.08206\frac{atm*L}{mol*K}*298.15K} =0.654molAr\)

Next, we add them up to obtain the total moles:

\(n_T=0.981mol+0.654mol=1.635mol\)

Now, the total volume:

\(V_T=4.00L+8.00L=12.00L\)

Finally, the total pressure is computed by using the ideal gas equation:

\(P=\frac{1.635mol*0.08206\frac{atm*L}{mol*K}*298.15K}{12.00L}\\\\P=3.33atm\)

Best regards!

Option D, W3+ (g) → W4+ (g) + e-, requires the most energy for the ionization process.

The ionization interaction that requires the most energy is choice D, where W3+ (g) is ionized to W4+ (g) by the deficiency of one electron. This is on the grounds that the energy expected to eliminate an electron from a particle increments as the particle turns out to be all the more decidedly charged. Hence, it takes more energy to eliminate an electron from W3+ (g) than it does from W+(g), W2+ (g), or W3+ (g).

Choice An includes the expulsion of one electron from an impartial tungsten iota, and choice B includes eliminating an electron from W+. Choice C includes eliminating an electron from W2+. These ionization processes require less energy than choice D in light of the fact that the ionization energy increments as the particle turns out to be all the more emphatically charged. Hence, the ionization energy expected to eliminate an electron from W3+ is more prominent than that expected to eliminate an electron from any of the past particles.

Subsequently, choice D, W3+ (g) → W4+ (g) + e-, requires the most energy for the ionization interaction.

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Based on the fgiven K_{a} values of the acids, the equilibrim concentrations of\(HC_{2}H_{2}O_{2}\) and \(NH_{4}^{+}\) is dtermined using ICE tables.

An acid dissociation constant, \(K_{a}\) of an acid is a measure of the strength of the acid in solution. The larger the \(K_{a}\) value of an acid, the stronger the acid, therefore, acid dissociation constants are usually apply to only weak acids because strong acids have exceedingly large \(K_{a}\) values.

It is written as a  qoutient of the equilibrium concentrations of the aqueous species in the acid solution.

For the weak acids such as \(HC_{2}H_{2}O_{2}\) and \(NH_{4}^{+}\), their equilibrim concentrations are determined using their \(K_{a}\) values and an ICE table.

The pH of solutions are estimated using indicators such as methyl orange, methyl red and phenolphthalein. The colors of indicators change according to the pH of the solution

Acidic solutions have pH less than 7 while alkaline solutions have pH greater than 7.

Therefore, acids have low pH and weak acids have low \(K_{a}\) values.

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The decomposition of aspirin (acetylsalicylic acid,\(C_{9} H_{8} O_{4}\)) can occur through the hydrolysis reaction, resulting in the formation of acetic acid (\(CH_{3} COOH\)) and salicylic acid (\(C_{7} H_{6}O_{3}\)).

The decomposition of aspirin (acetylsalicylic acid, \(C_{9} H_{8} O_{4}\)) can occur through the hydrolysis reaction, resulting in the formation of acetic acid (\(CH_{3} COOH\)) and salicylic acid (\(C_{7} H_{6}O_{3}\)). To determine the moles of each product formed, we need to consider the balanced chemical equation for the reaction:

\(C_{9} H_{8} O_{4} = > C_{7} H_{6}O_{3} +CH_{3} COOH\)

From the equation, we can see that for every 1 mole of aspirin, 1 mole of salicylic acid and 1 mole of acetic acid are produced.

Therefore, the moles of salicylic acid and acetic acid formed will be equal to the number of moles of aspirin that decomposes. If we know the amount of aspirin in moles, we can directly calculate the moles of each product based on stoichiometry.

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To determine the enthalpy of reaction for the given reaction, use Hess's Law, which states that the total enthalpy change of a reaction is independent of the pathway between the initial and final states.

Break the given reaction into a series of steps for which the enthalpy changes are known or can be measured experimentally.

Add the enthalpy changes of each step to determine the overall enthalpy change for the reaction.

For example, determine the enthalpy of formation for A₂X₄(l), X₂(g), and AX₃(g) and use them to calculate the enthalpy of reaction for the given equation.

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Explanation:

a)Take percentages and divide by mole wt ( from periodic table) of the corresponding element

          C     14.25 / 12            = 1.1875

          O     56.93 / 15.99     = 3.56

          Mg   28.83/24.3        = 1.186        Divide by the smallest number

                        C 1.1875/1.186      = 1

                         O 3.56 / 1.186     = 3

                         Mg  1.186 / 1.186 =  1

C O3  Mg         commonly written as Mg CO3   ( magnesium carbonate)

1. Let's write the silver chromate using the oxidation number of each compound.

Oxygen has a -2 oxidation number, silver only contains +1 and chromate contains +2, 3, 6.

Remember that the ion chromate contains:

So, in our case we're going to use 2 atoms of Ag to complete the formula, like this:

2. Calculating the positive ions, in this case, corresponds to silver and chromate. In the last question, we realize that the ions of silver are +2 and the chromium was 6+. The oxidation number of oxygen is always negative so, this doesn't count. The positive ions are 2*2+6*1= +10 ions.

3. As we see before, oxygen is the only one that contains negative ions, so, we have 4 moles of oxygen which you can see in the formula. Multiplying this number by -2, we obtain -8 ions.

4. To calculate the mass we're going to use the molar mass of each element where you can find on the periodic table. (molar mass of oxygen = 16 g/mol, chromium = 52 g/mol and silver = 107.8 g/mol).

We multiply each molar mass with each mole of each element and then we're going to sum all of them, like this:

The mass of a chemical formula unit is 331.6 g/mol.

Answer: Standard temperature and pressure (STP) refers to the nominal conditions in the atmosphere at sea level. These conditions are 0 degrees Celsius and 1 atmosphere (atm) of pressure. The STP value is important to physicists, chemists, engineers, pilots and navigators, among others.

Answer:

F2 and Cl2 are non-polar because both contains same atom and they have same electronegativity.

ClF and NF3 have polar interactions because there is electronegativity difference between atoms.

Explanation:

The covalent bond is the chemical bond between atoms where electrons are shared, forming a molecule. Covalent bonds are established between non-metallic elements, such as hydrogen H, oxygen O and chlorine Cl. These elements have many electrons in their outermost level (valence electrons) and have a tendency to gain electrons to acquire the stability of the electronic structure of noble gas. The shared electron pair is common to the two atoms and holds them together.

Electronegativity is defined as the ability of an element to attract the electrons that link it to another element.

The covalent bond between two atoms can be polar or nonpolar.

When two atoms have different electronegativities, the one with the highest electronegativity will attract the electrons towards each other, giving rise to two opposite charges on the bond. That is, this generates that in a polar molecule there is separation between positive and negative charges. The bonds will be all the more polar the greater the difference in electronegativity between the bound atoms.

On the other hand, the non-polar covalent bond occurs between atoms of the same element or between atoms with very little electronegativity difference. It is thus characterized to molecules or bonds that do not exhibit any polarity.

A molecule is a dipole when there is an asymmetric distribution of electrons because the molecule is made up of atoms of different electronegativity. That is, dipole is formed when the molecule is polar.

So, dipole-dipole forces are forces of attraction between polar molecules. These molecules attract when the positive end of one of them is close to the negative of the other.

Given the above, F₂ and Cl₂ are non-polar molecules and ClF and NF₃ are polar molecules. Then ClF and NF₃ have polar interactions (dipole-dipole forces). -Brainly user