what will be the final temperature when 0.200 mol kch3coo is dissolved in 830 ml water that is initially at 25.1 ∘c ?

Answer:

D) Temperature,

Explanation:

False, Asbestos is a naturally occurring mineral fiber that was commonly used in various industries due to its heat resistance, strength, and insulating properties.

Asbestos does not necessarily need to be removed if it will not be disturbed or pose a risk to human health. Asbestos-containing materials that are in good condition and undisturbed are generally considered safe. However, if asbestos-containing materials are damaged, deteriorating, or will be disturbed during renovation or demolition activities, it is necessary to take appropriate precautions, which may include professional removal or encapsulation, to prevent the release of asbestos fibers into the air. The decision to remove asbestos should be based on an assessment of its condition, potential for disturbance, and adherence to local regulations and guidelines.

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The description of moving electrons revolving around the atomic orbitals of metal atoms is known as the electron sea model of metallic bonding.

The representation of moving electrons revolving around the atomic orbitals of metal atoms is known as the "electron sea" model of metallic bonding. Very few electrons are present in the outermost atomic orbitals during metallic bonding. The electrons can flow freely throughout the network of the metal because the unoccupied orbitals in the atom's highest energy levels overlap. The valence electrons are "delocalized," or move away from their own metal atoms and toward the atomic nuclei of interacting metal ions, creating a "sea of electrons."

Minerals containing transition metals exhibit metallic bonding frequently. Minerals with metallic bonding include gold, silver, and copper. Metallically bound compounds are efficient heat and electricity conductors because valence electrons can travel freely throughout the structure.

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In this case, a water sample has been diluted to 10^-3, which means it has been diluted by a factor of 1,000 times. So, the correct answer is:

The answer is option b. 300.

When a solution is diluted, it means that more solvent (usually water) has been added to decrease the concentration of the solute. The dilution factor is the ratio of the final volume of the solution to the initial volume of the solution.

In this case, the water sample has been diluted to 10-3, which means that the concentration of the original solution has been reduced by a factor of 10-3.

To calculate the dilution factor, we need to take the reciprocal of the concentration reduction factor:

Dilution factor = 1/10-3 = 1,000

So the water sample has been diluted by a factor of 1,000 times.

Therefore, the correct answer is option b. 300 is not the dilution factor, but rather the concentration reduction factor (1/300), which is the reciprocal of the dilution factor.

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Answer:

anion has a negative charge

An anion has more electrons than protons, consequently giving it a net negative charge

Therefore, the correct answer is (E) The reaction would shift toward products and the solubility would increase.

Both hydrogen ions (H +) and chloride ions (Cl -) would be added to the equilibrium mixture if hydrochloric acid were to be added. When hydrogen ions are on the right side of the equilibrium, it will shift to the left to make up for this, increasing the concentration of reactants.

When HCl is added to the system, what will happen to the chemical equilibrium There will be a leftward change in the chemical equilibrium.

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Answer:

Aluminum is an element

Explanation:

Aluminum is the most abundant metal in the earths crust with an atomic number of 13.

Answer:

82.24% percent composition of N and 17.76% percent composition of H .

Explanation:

Answers

Explanations

An aqueous solution of sodium bisulfate (NaHSO4) is acidic. Sodium bisulfate dissociates in water to form the bisulfate ion (HSO4-) and the sodium ion (Na+). This reaction can be represented by the following chemical equation:

NaHSO4 (s) → Na+ (aq) + HSO4- (aq)

The bisulfate ion is a weak acid, and it dissociates further in water to form the sulfate ion (\(SO4^{2-}\)) and the hydrogen ion (H+):

HSO4- (aq) → H+ (aq) + SO42- (aq)

This additional dissociation of HSO4- increases the concentration of H+ ions in the solution, making the solution acidic. The presence of H+ ions in the solution means that the solution has a pH of less than 7, which is the definition of an acidic solution.

What is an aqueous solution?

An aqueous solution is a sort of mixture in which one or more solutes have been dissolved in water as the solvent. Any kind of material, including salts, acids, bases, and sugars, can serve as solutes. The word "aqueous" describes a solution's water content. These kinds of solutions are prevalent in biology and chemistry and are essential to numerous industrial and natural processes.

An aqueous solution is one in which water serves as the solvent. In chemical equations, it is often represented by adding to the appropriate chemical formula. For instance, Na⁺ + Cl⁻ might be used to depict a solution of table salt, or sodium chloride, in water.

Water, which makes up around 70% of the mass of the human body and is necessary for life, serves as the solvent in aqueous solutions.

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Answer:

Carbon Monoxide.

Explanation:

I used to lol. Things didn't pop up well in a doctor's appointment and I had it explained to me.

Answer:

the weight of products is is equal the weight of the wood plus the weight of oxygen that was used to burn that wood, so weigh of the product is greater than 10 kilograms.

Explanation:

Conservation of mass (mass is never lost or gained in chemical reactions), during chemical reaction no particles are created or destroyed, the atoms are rearranged from the reactants to the products.

In this example wood (mostly carbon) and oxygen are reactants and carbon dioxide (mostly) is product of reaction.

Answer:

pH is an index of how many protons, or hydrogen ions (H+) are dissolved and free in a solution. The pH scale goes from 0 to 14. A fluid with a pH of 7 is neutral. Below 7, it is acidic; above 7, it is alkaline.

The more below or above 7 a solution is, the more acidic or alkaline it is. The scale is not linear—a drop from pH 8.2 to 8.1 indicates a 30 percent increase in acidity, or concentration of hydrogen ions; a drop from 8.1 to 7.9 indicates a 150 percent increase in acidity. Bottom line: Small-sounding changes in ocean pH are actually quite large and definitely in the direction of becoming less alkaline, which is the same as becoming more acidic.

If you think about it, we use descriptive words like this all the time. A person who stands 5’5” tall and weighs 300 pounds isn’t thin. If he loses 100 pounds, he still won’t be thin, but he will be thinner than he was before he went on the diet. (And we are more likely to comment that he’s looking trimmer than to say he’s not as fat as he used to be.)

Answer:

compound is a material formed by chemically bonding two or more chemical elements.

Explanation:

Answer:

B- why or how because any scientist deals with matter it's relationships ,properties and its composition which can be inferred from the questions why and how

The elements found in the human body would be the following:

1. hydrogen,

2. oxygen,

3. carbon

4. nitrogen

They are found throughout your body, mostly as water but also as components of biomolecules such as proteins, fats, DNA, and carbohydrates.

Hope this helped and correct me if I am wrong, I did some outside research. Have a good one!

The properties of the dyes you can make from different flowers are:

Flower dyes have unique colors to offer a range of options for marketing. Rose petals yield pink and red shades. They are Natural and safe. Eco-conscious consumers prefer synthetic-free products, making your dyes attractive.

In terms of Aromatic Qualities: Lavender and jasmine smell nice. Using these flowers in dyes adds subtle scents for a sensory experience. Lightfastness and durability are crucial for creating dyes that resist fading when in the sunlight.

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I believe the anwser is C

I hope this is right! <3

Answer:pluto

Explanation:

Since 2006, per the International Astronomical Union's planetary criteria, Pluto isn't considered a planet because it hasn't cleared the neighborhood around its orbit of other objects.

Answer:

Pluto

Explanation:

Saturn is huge, second biggest plant in our solar system

mercury is big same with Uranus

and Pluto is closer to a moon than a planet

The correct statement is b. (CH3)2NH is the stronger base in aqueous solution.

The basicity of an amine depends on the availability of its lone pair of electrons for accepting a proton (H+) from water. In general, the more electron-donating groups or alkyl substituents attached to the nitrogen atom, the more basic the amine.

In the case of (CH3)2NH, it has two methyl groups (CH3) attached to the nitrogen atom. These alkyl groups are electron-donating and increase the electron density around the nitrogen atom. This increased electron density makes the lone pair of electrons on the nitrogen atom more available for accepting a proton from water, making (CH3)2NH a stronger base in aqueous solution.

On the other hand, (CHR)N refers to an amine with a single alkyl group (R) attached to the nitrogen atom. Since there is only one alkyl group, the electron density around the nitrogen atom is lower compared to (CH3)2NH. Consequently, the lone pair of electrons on the nitrogen atom is less available for proton acceptance from water, making (CHR)N a weaker base in aqueous solution compared to (CH3)2NH.

Therefore, (CH3)2NH is the stronger base in aqueous solution, as it has two electron-donating methyl groups attached to the nitrogen atom, increasing its basicity.

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Before performing chemical reactions, it is helpful to know how much product will be produced with given quantities of reactants. This is known as the theoretical yield. This is a strategy to use when calculating the theoretical yield of a chemical reaction. The same strategy can be applied to determine the amount of each reagent needed to produce a desired amount of product.

   The mole ratio is the stoichiometric ratio between the amount of one compound and the amount of another compound in a reaction. For this reaction, for every two moles of hydrogen gas used, two moles of water are produced. The mole ratio between H2 and H2O is 1 mol H2/1 mol H2O.

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Answer:

I guess second option i.e. More potential employment opportunities and revenue because collecting recyclable material needs manpower to collect them, and secondary employment in transport i.e. to collect all the material at one place we need transport and so on!

Answer:

ATOMIC number of element A is 3

Explanation:

Atomic number is the same as number of protons of an element.

according to the periodic table, Lithium is the element with 3 protons in its neutral state and it's atomic number is 3.

Ions are  linked by the electrical charge present on them. Which is  moreover negative(-) or positive(+).

The  motes or  tittles which have lost or gained electrons are called ions. The in the imbalance between the number of protons and the neutrons.

Tittles or  motes which loose electrons come  appreciatively charged called cations and  tittles or  motes which gain electrons come negatively charged called anions.  

It's  pivotal to identify ions to understand the chemical  responses and the  conformation of  composites, because the charge present on them determines its  geste.

Also by counting the number of protons and electrons we can determine the charge on the ion.    

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The complete Lewis structure of lactic acid is:
H      H
|      |
H-C-C-OH
|      |
H-C-C=O
|      |
H      OH

When lactic acid reacts with water, one of the OH groups will dissociate and form H+ ions. The complete Lewis structure of the product, H3O+, is:
      H
      |
H      O-H
|      ||
H-C-C=O
|      |
H      OH

(b)
To prepare 100.00 mL of a 1.00 M aqueous solution of NH4Cl, we need to dissolve 5.33 g of NH4Cl in distilled water. Here are the steps:

(1) Use the balance to weigh out 5.33 g of NH4Cl(s).

(2) Carefully transfer the solid into a 100 mL volumetric flask.

(3) Add distilled water up to the etched line.

(4) Mix the solution thoroughly until all the solid is dissolved.
You can use a stirring rod to help dissolve the NH4Cl.
The 50 mL buret, 100 mL graduated cylinder, and 100 mL pipet are not needed for this procedure.

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Answer:

53 Joules

Explanation:

Applying the law of conservation of mechanical energy.

Law of conservation of mechanical energy: States that energy although, energy can not be transformed from one form to another, the total energy of the system remain the same.

I.e,

Mechanical Energy = E.K+P.E..................... Equation 1

Where E.K = Kinetic energy, P.E  = Potential energy.

From the question,

Given: Mechanical energy = 65 Joules, K.E = 12 J

Substitute these values into equation 1 and solve for P.E

65 = 12+P.E

P.E = 65-12

P.E = 53 Joules

To reach break point chlorination in a 96,000 gallon pool with a difference of 0.4 ppm between the free chlorine and total chlorine levels, approximately 7.68 ounces of chlorine is needed.

To calculate the amount of chlorine needed to reach break point chlorination in a 96,000 gallon pool, we first need to find the difference between the total chlorine and free chlorine levels. Break point chlorination is achieved when the free chlorine level equals the total chlorine level.

Given that the free chlorine level is 1.4 ppm and the total chlorine level is 1.8 ppm, the difference between them is:

1.8 ppm - 1.4 ppm = 0.4 ppm

Now, we need to determine the amount of chlorine required to raise the free chlorine level by 0.4 ppm in a 10,000 gallon pool. The given information states that it takes 2 ounces of dry chlorine (67% concentration) to raise a 10,000 gallon pool's chlorine level by 1 ppm.

To calculate the amount of chlorine required to raise the free chlorine level by 0.4 ppm in a 10,000 gallon pool, we can set up a proportion:

2 ounces / 1 ppm = X ounces / 0.4 ppm

Solving for X (the amount of chlorine needed for 0.4 ppm increase in a 10,000 gallon pool):

X = (2 ounces / 1 ppm) * 0.4 ppm = 0.8 ounces

Now, we can calculate the amount of chlorine needed for the 96,000 gallon pool by scaling the chlorine required for the 10,000 gallon pool:

Amount of chlorine needed = (0.8 ounces / 10,000 gallons) * 96,000 gallons

Amount of chlorine needed = 0.8 ounces * 9.6 = 7.68 ounces

Therefore, approximately 7.68 ounces of chlorine is needed to reach break point chlorination in the 96,000 gallon pool.

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To calculate the maximum wavelength of light for which a carbon-chlorine single bond could be broken by absorbing a single photon, we need to use the energy and wavelength relationship for photons.

The equation is: E = h * c / λ
where E is the energy required to break the bond (in joules), h is Planck's constant (6.626 x 10^-34 Js), c is the speed of light (3.0 x 10^8 m/s), and λ is the wavelength (in meters).
First, we need to convert the energy from kJ/mol to J/photon. There are 6.022 x 10^23 photons in a mole, so:
E = 338 kJ/mol * (1000 J/1 kJ) / (6.022 x 10^23 photons/mol) ≈ 5.613 x 10^-19 J/photon
Now we can rearrange the equation to solve for λ: λ = h * c / E
Substitute the values: λ = (6.626 x 10^-34 Js) * (3.0 x 10^8 m/s) / (5.613 x 10^-19 J/photon) ≈ 3.551 x 10^-7 m
To convert the answer to nanometers (nm) and round it to significant digits:
λ = 3.551 x 10^-7 m * (1 x 10^9 nm/1 m) ≈ 355 therefore, the maximum wavelength of light required to break a carbon-chlorine single bond is 177.8 nm, which falls in the ultraviolet range of the electromagnetic spectrum.
In conclusion, the maximum wavelength of light for which a carbon-chlorine single bond could be broken by absorbing a single photon is approximately 355 nm.

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Answer:

Radiocarbon dating works by comparing the three different isotopes of carbon. Isotopes of a particular element have the same number of protons in their nucleus, but different numbers of neutrons. This means that although they are very similar chemically, they have different masses.

Explanation: