Which of the following is a salt that will form when a strong acid and weak base are combined? Select the correct answer below: NaCI H20 AICI3 NH4Br

A sample of a gas occupies 1600 milliletrs at 20 celcius and 600 torr. What volume will it occupy at the same tempretrure at 800 torr is the gas will occupy a volume of 1200 milliliters at 20°C and 800 torr.

To answer your question, we can use the combined gas law which states that: (P₁V₁)/T₁ = (P₂V₂)/T₂

where P is pressure, V is volume, and T is temperature.

We know that the initial volume (V₁) of the gas is 1600 milliliters, the initial temperature (T₁) is 20 Celsius (which is 293 Kelvin), and the initial pressure (P₁) is 600 torr. We want to find the final volume (V₂) of the gas at the same temperature (T₂) but at a pressure of 800 torr.

Plugging in the values, we get: (600 torr)(1600 mL)/(293 K) = (800 torr)(V₂)/(293 K)

Solving for V₂, we get: V₂ = (600 torr)(1600 mL)/(800 torr) = 1200 mL

Therefore, the gas sample will occupy a volume of 1200 milliliters at 20 Celsius and 800 torr.
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A 5-carbon sugar, a phosphate group, and a nitrogenous base make form a nucleic acid monomer known as An ​Nucleotide

A nucleotide is the initial building step of nucleic acids (RNA and DNA). A sugar molecule (either ribose in RNA or deoxyribose in DNA), a phosphate group, and a base containing nitrogen make up a nucleotide. DNA uses the nucleotides adenine (A), cytosine (C), guanine (G), and thymine (T).

Biopolymers and macromolecules called nucleic acids are necessary for all known forms of life. They are constructed of monomers called nucleotides, which are composed of a nitrogenous base, a phosphate group, and a 5-carbon sugar.

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A reaction that requires energy would be spontaneous.

A spontaneous process is one in which we can proceed without additional input of energy releasing free energy and then moves to a lower more stable thermodynamical state.

Therefore, A reaction that requires energy would be spontaneous process. (option b)

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Answer:

Verdadero.

Explanation:

¡Hola!

En este caso, dado que las propiedades periódicas nos hablan de un comportamiento específico sobre los elementos en la tabla periódica, resulta primeramente necesario recordar que la electornegatividad nos dice que tan fuerte es un elemento para atraer electrones de valencia de otros elementos.

De este modo, inferimos que es verdadero, ya que de hecho la electronegatividad nos define el tipo de enlace, basado en la diferencia de electronegatividades de los elementos enlazados, de acuerdo con la imagen adjunta.

Saludos!

Answer:

I think the answer would be 'testable'.

Answer:

B) Lithium

C) Barium

F) Potassium

Explanation:

All of the above are Inorganic Compounds.

Answer:

\(\boxed {\boxed {\sf Cobalt, Iron, and \ Copper}}\)

Explanation:

The Stock System states that In a chemical formula or equation, some metals need a roman numeral after their symbol. If a metal has multiple oxidation states, it needs a roman numeral.

Use the Periodic Table to see the oxidation states for each metal.

We can see that cobalt, iron, and copper have more than one oxidation state, so they would require a roman numeral.

In the given reaction  fluorine is reduced and chlorine is oxidized.

Oxidation is a process in which addition of oxygen or removal of hydrogen and electron takes place, while reduction is a process in which addition of hydrogen & electrons or removal of oxygen takes place.

Given chemical reaction is:

F₂ + 2HCl → Cl₂ + 2HF

F₂ + 2e⁻ → 2F⁻

2Cl⁻ → Cl₂ + 2e⁻

Hence, fluorine is reduced and chlorine is oxidized in the given reaction.

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According to the question  the volume of dry butane at 824.1 torr and 55.9 °C is 0.945 L.

Volume is the measure of the three-dimensional space that an object or substance occupies. It is usually measured in cubic units such as milliliters (ml), liters (L), or cubic centimeters (cm3). Volume is an important physical property of substances because it helps to determine the amount of a material present in a given space.

We can use the Ideal Gas Law to calculate the volume of the dry butane gas.

The Ideal Gas Law states that PV = nRT, where P is pressure, V is volume, n is the number of moles of the gas, R is the ideal gas constant, and T is temperature.

First, we need to calculate the number of moles of butane gas, n, using the molar mass of butane, which is 58.12 g/mol.

n = (mass of gas)/(molar mass of gas)

n = (1.00 L * 754.4 torr * 0.08206 L*atm/mol*K * (283.15 K))/(58.12 g/mol * 101.325 kPa/atm)

n = 0.077 moles

Now that we know the number of moles of butane gas, we can calculate the volume of the dry butane gas at the new pressure and temperature.

V = (nRT)/P

V = (0.077 moles * 0.08206 L*atm/mol*K * (328.04 K))/(824.1 torr)

V = 0.945 L

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Based on the provided information, the number of grams of carbon should you end with is 5g.

If you start with 5 grams of carbon on the reactant side, the grams of carbon you should end with 5g based on the law of conservation of mass. The law of conservation of mass, also known as principle of mass conservation postulate that for any system closed to all transfers of matter and energy, the system mass must remain constant over time, as the mass of system cannot change, so quantity can neither be added nor be removed. Hence, the law states that mass is neither created nor destroyed in a chemical reaction. Hence, the grams of reactants that one starts with, one will end with the same amount. Chemicals recombine to give a different compound in the product, the mass is still always conserved.

Note: The question is incomplete. The complete question probably is: If you start with 5 grams of carbon on the reactant side, how many grams of carbon should you end with?

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Answer: sodium

Explanation: Because each element has an exactly defined line emission spectrum, scientists are able to identify them by the color of flame they produce. For example, copper produces a blue flame, lithium and strontium a red flame, calcium an orange flame, sodium a yellow flame, and barium a green flame.

Based on the flame test, the gaseous element which is present in street lights is sodium.

Spectrum is a table or a chart in which intensity of the emitted lights are showing over a range of species.

Each element show different color of spectrum in the emission process, whenever excited element emitted enegy then released energy is shown in the form of color spectrum. In traffic lights sodium lamps are present which in the presence of heat gets excited and changes to the gas form and emitted yellow color light.

Hence sodium gaseous element is present in street lights.

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At a temperature of 150 °C and a pressure of 1 atm, the maximum volume that 5 moles of gas produced by the full breakdown of 1 mole of Ca(NO3)2 would occupy are 17.1 L.

Would occupy at a temperature of 150 °C and 1 atm pressure. Using the ideal gas formula, PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature, it is possible to determine the maximum volume of the gas created. The volume of 5 moles of gas at 150 °C (423 K) and 1 atm pressure can be computed as follows:

V = (nRT)/P = (5 mol x 0.0821 L/atm/mol/K/423) K / 1 atm = 17.1 L

The balanced equation predicts that 2 moles of Ca(NO3)2 will result in 4 moles of NO2 and 1 mole of O2. As a result, 1 mole of Ca(NO3)2 completely decomposes into 4 moles of gas and 1 mole of solid.

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In this type of reaction, a better reactive compound displaces the less reactive compound. For instance, zinc exists better reactive than hydrogen, therefore zinc will displace hydrogen.

The reaction, Zn + \(H_2SO_4\) →  \(ZnSO_4 + H_2\), exists an illustration of single replacement reaction. A single replacement reaction exists even comprehended as a displacement reaction.

The general structure of a displacement reaction exists:

A + BC → AC + B

In this type of reaction, a better reactive compound displaces the less reactive compound. For instance, zinc exists better reactive than hydrogen, therefore zinc will displace hydrogen.

This equation indicates the development of a chemical difference. When one molecule of zinc and one molecule of sulphuric acid responds it results in the exhibition of one molecule of zinc sulfate and one molecule of hydrogen.

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Answer: more in the wild

Explanation:

The pH of the buffer solution is approximately 7.65.

To calculate the pH of a buffer solution, first determine the concentration of \(KH_{2} PO_{4}\) and \(Na_{2} HPO_{4}\).

Calculate moles of \(KH_{2} PO_{4}\) and \(Na_{2} HPO_{4}\):

- \(KH_{2} PO_{4}\): (30.0 g) / (136.09 g/mol) = 0.2203 mol

- \(Na_{2} HPO_{4}\): (49.0 g) / (141.96 g/mol) = 0.3451 mol

Calculate concentrations in the 1.00 L solution:

- [\(KH_{2} PO_{4}\)] = 0.2203 mol / 1.00 L = 0.2203 M

- [\(Na_{2} HPO_{4}\)] = 0.3451 mol / 1.00 L = 0.3451 M

Use the Henderson-Hasselbalch equation:

pH = pKa + log ([A-]/[HA])

- For \(H_{2} PO_{4}\)-/HPO4²-, the pKa = 7.21.

- pH = 7.21 + log (0.3451/0.2203)

Calculate the pH:

- pH ≈ 7.21 + 0.438 = 7.65

The pH of the buffer solution is approximately 7.65.

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This given statement "Pulque production is increasing in the Teotihuacan Valley."The production of pulque in the Teotihuacan Valley is increasing at a rapid rate" is true because  there has been a resurgence of interest in this traditional drink, leading to increased production in regions like the Teotihuacan Valley.

Pulque production is increasing in the Teotihuacan Valley. Pulque is a traditional Mexican alcoholic beverage made from the fermented sap of the agave plant. In recent years,

Pulque is a fermented alcoholic beverage made from the sap of the maguey plant's core. It's been used for centuries in central Mexico, and it's still common today. Pulque is a milky, slightly viscous liquid that has a somewhat sour taste. Pulque was regarded as a sacred drink by ancient peoples in Mexico. Pulque is a prominent drink in Mexico, and it has a long history of use.

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Answer:

Soap is an excellent cleanser because of its ability to act as an emulsifying agent. An emulsifier is capable of dispersing one liquid into another immiscible liquid. This means that while oil (which attracts dirt) doesn't naturally mix with water, soap can suspend oil/dirt in such a way that it can be removed.

Soap acts as a cleaner because of its ability to act as an emulsifying agent. A soap molecule has a polar head and a nonpolar tail. Soap consists of a carbon chain where one end attracts oil and the other attracts water.  

Most of dirt can be described as oily in nature as oil does not dissolve in water. The molecule of soap consists of sodium salts of long-chain carboxylic acids. In soaps, the chain of carbon atoms dissolves in the oil, and the ionic or polar end of the soap molecule dissolves in water.

The soap molecules produce structures known as micelles. In micelles, one end faces the oil droplet, and the other end which is ionic in nature faces outside. Therefore, soap can form an emulsion in water and supports in dissolving the dirt when we wash our clothes.

Soap can be described as a kind of molecule in which both ends have different properties. The hydrophilic end dissolves water and is attracted to it whereas the hydrophobic end is dissolved in hydrocarbons and is water repulsive in nature.

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Answer:

A process during which chemical bonds between atoms are broken and new ones are formed, producing one or more substances.

Moles are the amount of substance that contains as many particles.

Explanation:

A chemical reaction is when a chemical change occurs for example when a nail comes into contact with air and is then exposed to air it begins to rust. It forms a red-brown substance which changes the chemical composition of the original compound.

Examples of chemical reactions:

Combustion

Oxidation (rusting)

Cooking an egg

Photosynthesis

Digestion

Fireworks

Paper Burnin

The mole is the amount of substance that contains as many particles (molecules, ions or atoms) as there are in 12g of carbon.

1 mol is the amount of substance that contains the same number of particles as there are atoms in 12.0 g of carbon-12 and that number is referred to as Avogardo's constant (6.022 x \(10^{23}\)).

Answer: Low melting points

Explanation:

Answer:

6amu

Explanation:

mass=proton+neutron

mass of cl2=2(16+16)=64amu

c)  ester can be produced by reacting alcohol with carboxylic acid

What is esterification ?

The general term for a chemical reaction in which two reactants (usually an alcohol and an acid) combine to create an ester as the end product is "esterification." Esters are frequently found in organic chemistry and biological materials, and they frequently have a distinctive, fruity scent.

The process of making ester typically involves combining a carboxylic acid with an excess of an alcohol while using a tiny amount of a strong acid, like conc.H2SO4, as a catalyst. The esterification reaction is reversible, and the equilibrium constant for the reaction is often close to 1. Numerous strategies are employed to raise the ester yield because the reaction is reversible.

c)  ester can be produced by reacting alcohol with carboxylic acid

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Answer:

a.) It matches the universal pH indicator and is indicating the proper pH.

Explanation:

it says its the answer.

Answer:

Explanation:

An object is thrown vertically from the ground upwards with a speed of 10 m/s. Considering g = 10 m/s2, the maximum height that the object reaches from the ground, in meters, will be:

a) 15.0.

b) 10.0.

c) 5.0.

d) 1.0.

e) 0.5.

(a) The the concentration of C₆H₅NH₃ in this buffer solution is 1.48 M.

(b) The pH after 4.0 g NaOH(s) is added to 1.0 l of this solution is 4.20.

(a)

pKb of C₆H₅NH₂ = - log (3.8 x 10⁻¹⁰) = 9.42

pH = 4.11

pOH = 14 - 4.11 = 9.89

According to Henderson Hasselbalch equation

pOH = pKb + log[C₆H₅NH³⁺]/[C₆H₅NH₂ ]

9.89 = 9.42 + log[C₆H₅NH³⁺]/(0.50)

10^0.47 = [C₆H₅NH³⁺]/(0.50)

[C₆H₅NH³⁺]= 1.48 M

(b)

Moles of NaOH = 3.2 g/(40 g/mol) = 0.08 mol

Moles of C₆H₅NH₂ = 0.50 M*1.0 L = 0.50 mol

Moles of C₆H₅NH³⁺ = 1.48 M*1.0 L = 1.48 mol

NaOH reacts with C₆H₅NH³⁺ to form C6H5NH2.

So, final moles of C₆H₅NH₂ = 0.50 + 0.08 = 0.58 mol

Final moles of C₆H₅NH³⁺ = 1.48 - 0.08 = 1.40 mol

Using Henderson Hasselbalch equation:

pOH = 9.42 + log(1.40/0.58)

= 9.80

pH = 14 - 9.80 = 4.20

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The final temperature is  -124Celsius

Charles's Law is a fundamental gas law that describes the relationship between the volume and temperature of a gas at constant pressure. It states that the volume of a given amount of gas is directly proportional to its absolute temperature, provided that the pressure and the number of particles are held constant.

Give that;

V1/T1 = V2/T2

V1 = 420 ml

T1 =  25.0 + 273 = 298 K

V 2 = 210 ml

T2 = ??

Thus;

V1T2 = V2T1

T2 = V2T1/V1

= 210 ml *  298 K/420 ml

= 149 K or -124Celsius

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0.2ml is required as 1 : 4 dilution to make 4ml of 1 : 80 dilution.  

Dilution is the addition of solvent, which decreases the concentration of the solute in the solution.

Concentration on the other hand, is the removal of solvent, which increases the concentration of the solute in the solution.

The volume of solution needed to make the solution can be calculated by the formula,

V1 x N1 = V2 x N2

4 ml of 1:80 diluted solution has to be made from 1:4 solution.

Applying these values in the above formula,

V1 x (1/4) = 4 x (1/80)

V1/4 = 1/20

V1 = 4/20

V1 = 0.2 ml

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Answer: We add small amount of chlorine to water to kill bacteria that cause infection.

Explanation: Adding chlorine to water is called chlorination. It is done to remove unwanted materials like pathogens viruses, and bacteria. the effectiveness of chlorine added depends upon the water temperature, water pH, turbidity, etc.

chlorine is available in two formulations, as a dry powder or pellet. chlorination is more effective at a high temperature and a low pH.

Answer:

6.02x10^23 atoms  i think

Explanation:

Answer:

I would

Explanation:

I would support the change to the metric system only because it allows children to understand smaller forms of units and measurements. Also, it will allow people in the math and science fields to broaden their knowledge of equations and formulas. Meaning that the scientist and mathematicians will be able to solve more problems in the world right now.  Overall, the education system for the children of the United States would benefit from the change in the measurement system.