kiki makes a table to compare the particles in a magnesium atom to those in a magnesium ion. a 3 column table with 3 rows. the first column is not labeled but have entries protons, neutrons, electrons. the second column is labeled magnesium atom with entries 12, 12, 12. the last column is labeled magnesium ion with entries x, y, z. she knows that a magnesium ion has an electric field that points away from the ion. what values should she use to complete her table?

When the reactants have less enthalpy than the products, then heat energy is given out. That is option A.

An exothermic reaction is a type of reaction in which the energy level of the reactants are higher than that of the product.

It is this discrepancy in the energy levels of both the reactants and products would lead to the generation and release of energy into the surrounding environment.

The enthalpy of exothermic reaction is gotten by the difference between the energy needed to break the bonds of reactants and the energy needed for the formation of products.

Therefore,when the reactants have less enthalpy than the products, then heat energy is given out.

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The new (final) volume of the sample of gas is equal to 0.1922 \(cm^3\).

Given the following data:

To determine the new (final) volume of the sample of gas, we would apply Boyle's law:

Mathematically, Boyle's law is given by the formula;

\(PV = k\\\\P_1V_1 = P_2V_2\)

Where;

Making \(V_2\) the subject of formula, we have:

\(V_2 =\frac{P_1V_1}{P_2}\)

Substituting the given parameters into the formula, we have;

\(V_2 = \frac{47.8 \times 3}{746} \\\\V_2 = \frac{143.4}{746}\)

New volume = 0.1922 \(cm^3\)

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Answer:

water because the other two were formed through a chemical process

Answer:

A one mL per minute rate (or slower) is recommended for best results in a fractional distillation; simple can go faster. Slow, gradual distillation essentially allows the best equilibration and heat transfer. If you heat too fast, vapors may not condense as quickly as desired, and may waste some of the column.

When a student needs more of a hazardous material, the recommended procedure is to follow proper safety protocols and guidelines, including consulting with the instructor or supervisor.

Handling hazardous materials requires careful consideration of safety measures to minimize the risks involved. In this situation, the student should first consult with their instructor or supervisor to communicate their need for more of the hazardous material. The instructor or supervisor can provide guidance on the appropriate procedures to follow, including assessing the necessity for the material and ensuring that the student has the necessary training and knowledge to handle it safely.

It is crucial to understand the risks associated with the hazardous material and follow all safety guidelines and protocols. This may include wearing appropriate personal protective equipment (PPE), working in a well-ventilated area, and using proper storage and disposal methods.

Furthermore, it is important to adhere to any legal requirements or regulations regarding the procurement and handling of hazardous materials. This may involve obtaining the necessary permits or licenses, ensuring compliance with safety standards, and maintaining proper documentation.

By following these recommended procedures, students can ensure their safety and the safety of others while obtaining the required amount of hazardous materials.

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Answer:

radio waves

Explanation:

Answer

C) no energy is lost; the total amount of energy remains the same.

Explanation

The law of conservation of energy states that "The energy can neither be created nor destroyed - only converted from one form of energy to another." Therefore some energy will be used for metabolism while the other can be used for other properties and some can be stored.

Answer:

(CH3COO)2 + redP + Cl2 → ClCH2COOH + HCl

Explanation:

This is an example of halogenation of carboxylic acids at alpha carbon atom. In this reaction, red phosphorus and chlorine are treated with carboxylic acids having alpha hydrogen atom followed by hydrolysis to form alpha chloro carboxylic acid.

Answer:

Rusting of iron

Explanation:

Between the two answer choices of 'Rusting of Iron' and 'Boiling an egg', rusting of iron is considered spontaneous.

In chemistry, spontaneity is considered a process or reaction that happens without any external stimuli, including energy. It is described if a process or reaction will occur on its own without any help.

Note that time in which a process or reaction will occur is not dependent on the spontaneity and does not reflect the rate of reaction.

Boiling an egg needs water and heat (which is energy) in order for the whites and yolk to harden so it is healthy and acceptable for humans to eat. However, the rusting of iron happens on its own over an extended period of time.

Iron rusts over time through a slow reaction of iron with oxygen in presence of water.

The iron (Fe) will react with the Oxygen gas (\(O_2\)) to form iron ions (\(Fe^2^+\)) over time. The iron ions, now with charge, have more ability to react to other molecules in the air, including water, and creates hydroxide ions (\(OH^-\)). These hydroxide ions then react with more Oxygen gas to form rust, which is written as \(Fe_2O_3\).

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Answer:

by using the chromatography you can separate different color

Volume of the unit cell = a³ = ( 3.718 × 10⁻¹⁰)³  = 5.14 × 10⁻²⁹ m³.

A single atom's radius of a generic element X = 161 picometers = 1.61 * 10⁻¹² m = 1.61 × 10⁻¹⁰ m

in the case of body-centered cubic,

There is a relationship between radius and edge length

(1.732 / 4) * edge length = radius (r)(a) or  (1.732 / 4) * edge length = 1.61 * 10⁻¹⁰ m or

(a) edge length = 3.718 * 10⁻¹⁰ m

thus

volume of the unit cell = a³ = ( 3.718 × 10⁻¹⁰)³  = 5.14 × 10⁻²⁹ m³.

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Answer:

136.36 mL

Explanation:

Here we have to use the dilution formula

From C1V1= C2V2

Where;

C1= initial concentration of the solution= 12.0 M

C2= final concentration of the solution= 2.20 M

V1 = initial volume of the solution= 25.0 ml

V2= final volume of the solution= ?????

Then recall;

C1V1=C2V2

V2 = C1V1/C2

Substituting values from the parameters given;

V2= 12.0 × 25.0 / 2.20

V2= 136.36 mL

We do not have enough information to deduce the isotope that would have nine neutrons. Option 5

The atom is composed of subatomic particles. The subatomic particles that are in the atom are such that we have the electrons that are negatively charged, the protons that are positively charged and the neutrons that are uncharged.

Now, we know that the number of neutrons is obtained as the difference between the mass number and the atomic number of the atom. In this case, we only have the mass numbers and not the atomic numbers thus we do not have sufficient information.

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Answer:

c

Explanation:

Answer:

A. a best guess explanation

Explanation:

A scientific theory explains why something behaves the way it does and is usually backed up by different sources. They are not speculations and can be proven. Those which are speculations and are not proven are called hypothesis. A scientific theory can also be replaced, if it is found that it does not produce valid results, or if a better theory is proposed which is made of one or more old theories.

Answer:red super giant

Explanation:

just look off the sides

Answer:

Explanation:

2S       +       3O₂       =       2SO₃

2moles      3 moles

2 moles of S react with 3 moles of O₂

5 moles of S will react with 3 x 5 / 2 moles of O₂

= 7.5 moles of O₂ .

O₂ remaining unreacted = 10 - 7.5 = 2.5 moles .

All the moles of S will exhausted in the reaction and 2.5 moles of oxygen will be left .  

The major product expected for the reaction between bromine (Br₂) and sodium hydroxide (NaOH) is sodium bromide (NaBr), while the minor product is water (H₂O).

In this reaction, the bromine (Br₂) reacts with the sodium hydroxide (NaOH) to form sodium bromide (NaBr) as the major product. This occurs through a substitution reaction, where the bromine replaces the hydroxide group of sodium hydroxide, resulting in the formation of NaBr. The balanced chemical equation for this reaction is:

\(Br₂ + 2NaOH → 2NaBr + H₂O\)

Water (H₂O) is formed as a minor product during the reaction. It is produced from the combination of the hydroxide group from sodium hydroxide and one of the bromine atoms. However, NaBr is considered the major product because it is the primary product formed in higher quantities compared to water.

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The aqueous solutions can be arranged in increasing boiling point order as follows: 0.050m Al(ClO4)3 < 0.110m K2CO3 < 0.300m C6H12O6.

The boiling point of a solution is influenced by the concentration of solute particles in the solution. The greater the concentration of solute particles, the higher the boiling point. In this case, we are comparing the boiling points of three different aqueous solutions.

The solution with the lowest boiling point is 0.050m Al(ClO4)3. This is because Al(ClO4)3 is an ionic compound that dissociates into multiple ions in water, thereby increasing the number of solute particles. Higher concentration of solute particles raises the boiling point.

The solution with the next higher boiling point is 0.110m K2CO3. K2CO3 is also an ionic compound and dissociates into two ions in water. Although the concentration is higher compared to Al(ClO4)3, it is lower than that of C6H12O6.

The solution with the highest boiling point is 0.300m C6H12O6. C6H12O6, which is glucose, is a molecular compound and does not dissociate into ions in water. Therefore, it has the lowest concentration of solute particles among the given solutions, resulting in the lowest boiling point.

Hence, the correct order of increasing boiling points is 0.050m Al(ClO4)3 < 0.110m K2CO3 < 0.300m C6H12O6.

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The answer is 0.0026.

Solution:

(V₁) Volume of NaOH = 100 mL

(V₂) Volume of HCl = 30.22 mL

(M₂) molarity of HC = 0.0750 m

(m₁) molarity of NaOH =

By using relation

M₁V₁ = M₂V₂

M₁ = M₂ V₂/V₁

M₁ =  0.0750ML*30.22mL/100 mL

M₁ = 0.0226

Now

molarity of NaOH = mole of NaOH/Volume of NaOH (in L)

mole of NaOH = molarity x volume

= 0.0226 mol/L X 100 X 10⁻³ L

= 0.0026 mol So the mole of NaOH is 0.0026.

When titrating NaOH with HCl using methyl orange as an indicator the endpoint color changes from yellow to red, so add HCl to the burette. This is just for ease of calculation. Put the hydrochloric acid in the burette and the soda solution in the Erlenmeyer flask. Methyl orange is used as an indicator.

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26.3 degrees is the minimum angle at which total internal reflection will occur

To determine the minimum angle for total internal reflection in this situation, we need to use Snell's law and the concept of critical angle. The critical angle is the angle of incidence at which light is refracted at an angle of 90 degrees and no light is transmitted, resulting in total internal reflection.

The formula for critical angle is:

sin θc = n2/n1

Where θc is the critical angle, n1 is the index of refraction of the medium the light is coming from (air in this case), and n2 is the index of refraction of the medium the light is entering (the glass window with an index of refraction of 1.6).

Plugging in the values, we get:

sin θc = 1.6/1

sin θc = 1.6

θc = sin^-1 (1.6)

θc ≈ 63.7°

This means that any angle of incidence greater than 63.7° will result in total internal reflection. However, we are looking for the minimum angle, so we subtract this value from 90 degrees (the angle of incidence where light is refracted at an angle of 0 degrees and goes straight into the glass):

90° - θc = 90° - 63.7°

Minimum angle = 26.3°

Therefore, the minimum angle at which total internal reflection will occur in this situation is 26.3 degrees.

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Synthetic materials are material that can be made by chemical process instead of being extracted from a natural resource.

Define chemical process.

An effective way to modify one or more chemicals or chemical compounds is through a chemical process. Such a chemical process involves a chemical reaction of some kind and can happen naturally or be triggered by an external factor.

A synthetic material is one in which the components are purposefully combined to create a substance with various properties. While most synthetic materials are the consequence of chemical processes, some are created from combinations. Synthetic fibers, ceramics, polymers, artificial foods, artificial pharmaceuticals, and composites are a few examples of synthetic materials. Flexible synthetic fibers are available. They can be utilized to create apparel and other items. The synthetic fibers nylon, polyester, and rayon are some examples.

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Answer:

water at 0C

Explanation:

The colder the water is, the denser it is, so the water here with the lowest temperature, is 0C

The final electron acceptor in aerobic respiration is oxygen (O2).The electron transport chain (ETC) in cellular respiration relies on a final electron acceptor to help oxygen get reduced into water. This is why oxygen is considered the final electron acceptor in cellular respiration.

During cellular respiration, glucose is broken down into pyruvate. Pyruvate is then transformed into acetyl CoA and enters the citric acid cycle, where it is oxidized and generates ATP, NADH, and FADH2. The final stage of aerobic respiration involves the electron transport chain, in which electrons from NADH and FADH2 are passed through a series of proteins and coenzymes in the inner mitochondrial membrane, ultimately reducing oxygen to form water.

This process is known as oxidative phosphorylation.In conclusion, the final electron acceptor in aerobic respiration is oxygen (O2), and carbon dioxide is generated in the link reaction (pyruvate oxidation) and the citric acid cycle.

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Answer:

Temperature and salinity

Explanation:

When heated, the air in the balloon will expand, resulting in an increase in volume and a reduction in density. The air within the balloon will thus be lighter than the air outside. The balloon then rises higher as a result.

Charles discovered that a gas's volume and temperature are inversely correlated when working with balloons. This link between temperature and gas volume, which came to be known as Charles' law, explains how hot-air balloons function.

The outcome is an increase in gas volume in line with Charles' law. As the balloon expands, the air within gets less dense and lifts the balloon.

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Answer:

In a chemical reaction, only atoms are present in the reactant and can end up with molecules. No new atoms are created and no more atoms are destroyed. In a chemical reaction, reactants contact with each other and the bond between atoms in the reactant is broken and atoms rearrange and form new bonds to make the product.

Explanation:

Answer:

Coal, Oil and Natural Gas.

Explanation:

Coal: It is the primary fuel for the production of electricity and is responsible for about 40% of the electric power supply in the United States. The burning of coal and the mining process is harmful to the environment releasing air pollutants such as sulfur dioxide, nitrogen oxide, and mercury.

2. Oil: Oil is the primary source for the world's transportation. Most oil is pumped out of underground reservoirs but may also be found in shale and tar sands.  

3. Natural Gas: About 27% of U.S. energy is fueled by natural gas. It is commonly used to produce heat or electricity for buildings and industrial processes.

Answer:

1a) .68 moles 1b)4.1E-23 molecules.

2a) .37 moles 2b) 2.27E-23 molecules

Explanation:

1a) CO2 is equal to 44 grams (C→12 grams,O→16 grams[·2]) .30g/44g is .68 moles.

1b) multiply 1A by advogadros number (6.022E-23)

2a) NaCl is 58 grams. 22/58 is .37 moles.

2b) multiply 2A by advogadros number.

you'd answer #3 the same way #1 and #2

The branch of science that deals with chemicals and bonds are called chemistry. The moles are units to calculate the quantity required to use the element.

The correct answer is mentioned below.

According to the question, the moles to the option is as follows:-

\(n =\frac{M}{M.M}\\ \\\frac{30}{44} \\\\=0.681\\\\\)

The number of molecules is \(0.68 *6022*10^{23} =4.09496*10^{23\).

2. moles of 22 grams of NaCl is

\(\frac{22}{44}\\ \\=0.5\\\\\)

Molecules will be \(0.5*6.022*10^{23} = 3.011*10^{23}\)

3. moles of 50-gram ammonia

\(\frac{50}{17} \\\\2.94\\\)

The number of molecules is \(2.94*6.022*10^{23} = 1770*10^{23\)

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The species that act as acid are the ones that donates H⁺ in the reaction.

Since we are working with an equilibrium, we have to consider both directions.

From left to right, we have H₂O turning into OH⁻ because it lost one H⁺, so H₂O is acting as an acid in the forward reaction.

From right to left, we have CH₃NH₃⁺ tunrning into CH₃NH₂ because it lost one H⁺, so CH₃NH₃⁺ is acting as an acid in the backwards reaction.

So, the species that act as acids are H₂O and CH₃NH₃⁺, I and II only.