The strength of an acid or base is related to its strength as an electrolyte. (a) Is the electrical conductivity of 0.1 M HCl higher, lower, or the same as that of 0.1 M CH₃COOH? Explain.

Answer:

Sorry I don't know.

Explanation:

I'm only in middle school.

We need to add 0.057 moles of KOH to 150 ml of 0.332 M acetic acid solution to prepare a buffer with a pH of 4.810. To prepare a buffer of pH 4.810, we need to use the Henderson-Hasselbalch equation:

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

where pH is the desired buffer pH, pKa is the dissociation constant of the weak acid (acetic acid, CH3COOH), [A^-] is the concentration of the conjugate base (acetate ion, CH3COO^-), and [HA] is the concentration of the weak acid.

The pKa of acetic acid is 4.76, so we can calculate the ratio of [A^-]/[HA] as:

10^(pH - pKa) = [A^-]/[HA]

10^(4.810 - 4.76) = [A^-]/[HA]

1.2 = [A^-]/[HA]

We want to prepare a buffer with a volume of 150 ml, so we need to calculate how many moles of each component we need. Let x be the number of moles of KOH needed to react with all of the acetic acid to form the acetate ion:

x moles of KOH = 0.332 moles of CH3COOH

The reaction between KOH and CH3COOH produces water and CH3COOK (potassium acetate). The number of moles of acetate ion produced is also x, so the total moles of acetate ion in the buffer is:

2x moles of CH3COO^-

Since we need a [A^-]/[HA] ratio of 1.2, we can set up the following equation:

1.2 = (2x)/(0.332 - x)

Solving for x, we get:

x = 0.057 moles of KOH

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The gram-formula mass of the product in the given reaction is 201.8g.

Gram Formula mass is the atomic mass of one mole of an element or a molecular compound, or an ionic compound.

To calculate the gram formula mass of a compound, the following applies;

According to this question, propene reacts with bromine to produce bromo propane with the molecular formula; C₃H₆Br₂.

Gram formula mass = 12(3) + 1(6) + 79.9(2) = 201.8g

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In this question, we have to determine the way in which an electron move from a ground state to an excited state, and the way this occurs is by absorbing energy, when the right amount of energy hits the electron, this electron will jump to a higher energy level. Therefore the answer will be the 1st option

2 C4H10 + 13 O2 → 8 CO2 + 10 H2O.

Answer:

Africa

Explanation:

Ang Africa ay ang kontinente na mayroong pinakamataas na bilang ng mga bansa sa lahat ng mga kontinente.

Kasalukuyan, ang bilang ng mga bansa sa kontinente ay 54, ito ay 53 bago ang South Sudan ang pinakabagong sumali.

Ang bilang na ito ay pinaniniwalaang tataas sa mga darating na taon dahil sa kaguluhan ng iba't ibang mga segment sa ilang mga bansa para sa kalayaan

The atmospheric pressure on top of Mt. Everest is 250 mmHg and 0.328 atm, when rounded to 3 significant digits.

Pressure is a force that is exerted over a surface area. It is the amount of force applied to an object per unit area. Pressure is typically expressed in units of force per unit of area, such as pounds per square inch (psi) or pascals (Pa). Pressure is an important factor in many areas of engineering, physics, chemistry, and biology.

Atmospheric pressure can be measured in torr (1 Torr = 1mmHg), atm (1 atm = 760mmHg) or in kPa (1 atm = 101.3kPa).
250 torr = 250 mmHg
250 mmHg / 760 mmHg = 0.328 atm

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Answer: F

Explanation:

The effects of exposure were more pronounced in fish that had been raised in a less stressful environment, suggesting that environmental conditions can influence the impact of exposure to antidepressants.

1. The class of drugs being investigated in this study is antidepressants. They enter our waterways through excretion by individuals taking the medication, and disposal of unused medication into toilets or sinks that are connected to wastewater treatment plants.

2. C-start is an evasive maneuver that young fish use when they perceive a predator. This is important for larval fish survival because it helps them to avoid being eaten by predators.

3. In this investigation, researchers are testing two hypotheses. The first is that exposure to low levels of antidepressants can affect larval fathead minnows' behavior, and the second is that the effects of exposure will be more pronounced in fish that have been raised in a less stressful environment.

4. The researchers found that exposure to antidepressants at levels found in waterways can have a significant impact on the behavior of larval fathead minnows. Specifically, they found that the fish exposed to antidepressants were less likely to respond to the presence of predators, which could increase their risk of being eaten.

They also found that the effects of exposure were more pronounced in fish that had been raised in a less stressful environment, suggesting that environmental conditions can influence the impact of exposure to antidepressants.

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Total energy released = (Eb1 + Eb2) - Eb3.

The total energy released in a fusion reaction is given by the difference in binding energies before and after the reaction. In this case, the two nuclei with binding energies Eb1 and Eb2 fuse together to form a new nucleus with binding energy Eb3.
Therefore, the total energy released in this fusion reaction is:
Eb1 + Eb2 - Eb3
This is because the energy required to break apart the two individual nuclei (Eb1 + Eb2) is greater than the energy required to keep the new nucleus together (Eb3). The excess energy is released in the form of radiation, heat, and kinetic energy of the reaction products.

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Metallic elements exist in a solid-state and they are opaque, have a shiny surface, good conductors of electricity and heat, malleable and ductile, and are dense. The structure of metals is formed by atoms that are held together by metallic bonds. These atoms have loosely bound valence electrons that can be shared between the neighboring atoms.

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A type of biotechnology called artificial selection is deliberately breeding plants or animals to promote or eliminate specific desirable qualities. Crops may be carefully bred by farmers, for instance, to increase their resistance to pests or drought.

Artificial selection is a type of biotechnology that involves selectively breeding plants or animals to enhance or suppress certain desirable traits.

For example, farmers may selectively breed crops to make them resistant to pests or droughts.

One benefit of artificial selection for individuals is that it can lead to higher crop yields, which can result in increased profits for farmers. However, one risk of artificial selection for individuals is that it can lead to the loss of genetic diversity in crops, which can make them more vulnerable to disease outbreaks.

One benefit for society is that artificial selection can help to alleviate hunger and food shortages by producing more food. However, one risk for society is that artificial selection can lead to the creation of monocultures, which are vulnerable to pests and disease outbreaks.

One benefit for the environment is that artificial selection can lead to the production of crops that require fewer pesticides and herbicides, which can reduce pollution. However, one risk for the environment is that artificial selection can lead to the loss of biodiversity, which can negatively impact ecosystems.

Attached is an image of a farmer selectively breeding crops.

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what describes “Al” is chemical Symbols.

It is not atomic mass because atomic mass is the quantity of matter contained in an atom of an element.

It is not atomic number because it's the number of proton in an atom of an

element.  

The above description "Al" is a chemical symbols.

Chemical symbols are used to represents elements in the periodic table.

The element represented is aluminium.

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Answer:

Explanation:

h

Answer:

vacuole

Explanation:

Brainliest please

Answer:

asdffafAFSAfdsdf

Explanation:

Answer:

zRNA

Explanation:

RNA is a nucleic acid responsible for the synthesis of proteins, since it is the molecule that carries the information contained in DNA for the biological process called transcription.

There are three types of RNA, the mRNA, the tRNA and the rRNA. There is no RNA called a zRNA, however, existing RNAs have different functions. These functions are listed below:

The mRNA is called messenger RNA and is the RNA responsible for containing the DNA information that will be translated into proteins created during protein synthesis.

The tRNA is responsible for identifying the information presented by the mRNA, creating amino acids from it and transporting those amino acids in the right order to form proteins.

rRNA is also called ribosomal RNA and is responsible for creating ribosomes, which are the organelles where protein synthesis will take place.

Answer:

The bubbling and rapid dissolution of the white powder when treated with diluted HCl acid suggests that the powder is a carbonate. Among the options provided, only (a) Na2CO3 and (e) CaCO3 are carbonates.

To determine which of the two it is, we can look at the results of the flame test. The brick red color of the flame indicates the presence of sodium ions in the solution, which suggests that the white powder is (a) Na2CO3, since it is the only compound in the options given that contains sodium.

Therefore, the answer is (a) Na2CO3.

Explanation:

The white powder that dissolves quickly in diluted HCl acid and produces intensive bubbling is most likely a carbonate compound. The options provided are Na2CO3, BaCO3, and CaCO3. These three carbonates are all known to react with HCl acid, producing carbon dioxide gas, water, and the corresponding metal chloride salt. The reaction can be represented as:

MCO3 + 2HCl → CO2 + H2O + 2MCl

The reaction between Na2CO3 and HCl is particularly vigorous, producing a large amount of carbon dioxide gas, which leads to the intensive bubbling. The other carbonates, including BaCO3 and CaCO3, react more slowly, producing fewer bubbles.

The flame test of the resultant solution, where the flame turns brick red in color, indicates the presence of sodium ions. Sodium ions are known to produce a brick red flame color when exposed to heat. Therefore, the correct answer to this question is option (a) Na2CO3.

In summary, the white powder treated with diluted HCl acid that dissolves quickly and produces intensive bubbling is most likely a carbonate compound. The flame test of the resultant solution, where the flame turns brick red in color, indicates the presence of sodium ions. The correct answer to this question is Na2CO3.

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Answer:

number of moles of the substance

Explanation:

Answer: it would be B

Explanation:

I took the test

Answer

c. Litmus Is red phenolphthalein is colorless

Explanation

A solution with a pH of 3 is acidic. The main use of litmus is to test whether a solution is acidic or basic, blue litmus turns red under acidic conditions, and red litmus turns blue under basic or alkaline conditions. Phenolphthalein is often used as an indicator in acid–base titrations. phenolphthalein, it turns colorless in acidic solutions and pink in basic solutions.

Therefore, the correct option for a solution with a pH of 3 is:

c. Litmus Is red phenolphthalein is colorless

An object with a mass of 5 kg requires a force of 25 N to accelerate at 5 m/s/s.

Force is described as the amount of energy need to move an object, either push or pull. For an object of constant mass, force is equal to the product when you multiply mass and its acceleration.

F = ma

where F = force (N or kg m/s^2)

m = mass (kg)

a = acceleration (m/s^2)

If an object requires a force of 25 N (= 25 kg m/s^2) to accelerate at 5 m/s/s, the using the formula F = ma, solve for its mass.

F = ma

25 N = 5 m/s/s (m)

25 kg m/s^2 = 5 m/s/s (m)

25 = 5m

m = 5 kg

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Answer:

A parasite.

Explanation:

A virus usually invades cells and replicates.

A bacteria usually just replicates and either is beneficial or can harm.

A fungus usually decomposes or can make you sick.

A parasite usually is parasitism - it invades the organisms and leeches off them for shelter and nutrients and can harm.

Answer:

A parasite.

Explanation:

i got it right

Answer and explanation

The solvent in the graph is water (H2O), water tells us that these substances dissolve at different amount of water, and the dissolvation is different in different temperatures in water. For example, NaCl readily dissolves in water.

Any carbon atom directly attached to a benzene ring is called a(n) sp2 hybridized carbon atom.

Benzene is a cyclic hydrocarbon that is known for its aromatic properties. Benzene has a molecular formula of C₆H₆, which means that it has six carbon atoms and six hydrogen atoms. The six carbon atoms are arranged in a ring, with alternating double and single bonds.

Each carbon atom in benzene is sp2 hybridized and is attached to two other carbon atoms and one hydrogen atom. Due to the delocalization of electrons in the ring, benzene is more stable than other cyclic hydrocarbons with similar molecular formulas.

Aromatic compounds are characterized by the presence of a benzene ring, and any carbon atom directly attached to a benzene ring is called a sp2 hybridized carbon atom. The sp2 hybridization of carbon atoms in benzene allows for the delocalization of electrons in the ring, which gives the compound its unique stability and reactivity.

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Answer:

D.

Explanation:

I assume its D because the controlled variable is what is kept the same throughout the experiment.

Answer:

The heaviest element to be created by exothermic nuclear fusion is Iron

Explanation:

Because it is the heaviest element produced during fusion without having to add energy, and it is the lightest element produced during fission without having to add energy. Energy-wise, everything in the universe wants to be iron! Iron is the most abundant element on Earth, making up 34.5 percent of Earth's mass.

AnswU GOT THIS!!!!!!!!!!!!!

Explanation:

Answer:

protein??

Explanation:

im not sure, but I could be wrong!!