1. Cooking pots are provided with wooden or plastic handles .Why?

Answer:

Explanation: It would be option A

Answer:

The Correct Answer is A

Explanation:

The rate increases.

The liquid dispensed from a burette is called Titrant.

When performing titrations, the liquid dispensed from a burette is known as the titrant, which is a solution of a known concentration used to react with a solution of unknown concentration. A burette is used in analytical chemistry to measure the volume of a liquid and to dispense measured quantities of a reagent. In acid-base titrations, the titrant is typically an acid or a base, while in redox titrations, the titrant is an oxidizing or reducing agent.

The liquid dispensed from a burette is added to the analyte solution until the reaction is complete and the endpoint is reached, indicating that the correct amount of titrant has been added to react with the analyte. The titrant is used to determine the unknown concentration of the analyte. In analytical chemistry, titrations are a common laboratory technique used to determine the concentration of a solution.

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Answer:

The main difference between isopropyl alcohol and rubbing alcohol is the concentration. The concentration of isopropyl alcohol is 100%, while the concentration of rubbing alcohol is less because of the addition of water. Otherwise, the two liquids have similar properties.

Explanation:

Hope this helps

The breakdown of a molecule resulting from a chemical reaction can be described as chemical decomposition. In this process, the molecule undergoes a transformation that leads to its fragmentation into simpler substances.

Chemical decomposition occurs when bonds within the molecule are broken, leading to the formation of new products. This reaction can be initiated by various factors such as heat, light, or the presence of catalysts. The breakdown may involve different types of reactions, including hydrolysis, oxidation, or thermal decomposition.

During chemical decomposition, the original molecule is transformed into one or more smaller molecules, atoms, or ions. This reaction is essential in various biological, industrial, and environmental processes. Understanding the mechanisms and factors that influence chemical decomposition is crucial for studying the behavior of substances and developing practical applications in fields such as chemistry, biology, and materials science.

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There is no direct involvement of \(Cu(NO_3)_2\) in the mole ratio calculation as it is not a reactant with \(AgNO_3.\)

The balanced chemical equation for the given reaction is:

\(2AgNO_3 + Cu -- > Cu(NO_3)_2 + 2Ag\)

According to this equation, the mole ratio between \(AgNO_3\) and Cu is 2:1, which means that for every 2 moles of \(AgNO_3\) used, 1 mole of Cu is consumed.

There is no direct mole ratio between \(AgNO_3\) and \(Cu(NO_3)_2\) or between \(AgNO_3\) and Ag. However, we can calculate the mole ratio between \(AgNO_3\) and Ag using the stoichiometric coefficients in the balanced equation.

For every 2 moles of \(AgNO_3\) used, 2 moles of Ag are produced. Therefore, the mole ratio between \(AgNO_3\) and Ag is 2:2 or simply 1:1.

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9.0 moles of Na3PO4 will form from 9.0 moles of H3PO4, rounded to the tenths place.

To determine how many moles of Na3PO4 form from 9.0 mol H3PO4, we need to use stoichiometry.

First, we'll identify the mole ratio between H3PO4 and Na3PO4 in the balanced chemical equation:

3NaOH + H3PO4 → 3H2O + Na3PO4

From the balanced equation, we can see that the mole ratio between H3PO4 and Na3PO4 is 1:1.

This means that for every 1 mole of H3PO4 reacted, 1 mole of Na3PO4 is produced.

Since we have 9.0 mol H3PO4:

9.0 mol H3PO4 * (1 mol Na3PO4 / 1 mol H3PO4) = 9.0 mol Na3PO4

So, 9.0 moles of Na3PO4 will form from 9.0 moles of H3PO4, rounded to the tenths place.

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The best way to make an accurate measurement of the height of a polar liquid is to take the reading from the lowest point of the meniscus.

The meniscus of a liquid is a curved that occurs at the top of a liquid placed in a container as a result of the attractive forces between the molecules of a the liquid.

Polar substances such as water have a concave meniscus as they dip downwards.

Therefore, the best way to make an accurate measurement of the height of a polar liquid is to take the reading from the lowest point of the meniscus.

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The answer is Solution!

Explanation:

Solution is a homogeneous mixture

of two or more substance. In a

sugar solution, sugar gets uniformly

mixed with water

Bromine is 35th element in periodic table. The electronic configuration of bromine (35) is 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁵.

Electronic configuration is the distribution of electrons in the energy levels, sublevels, and orbitals of an atom or molecule. It describes how the electrons are arranged in the various shells or energy levels around the nucleus of an atom.

The electronic configuration of an atom is determined by the number of electrons and the rules of electron filling in the atomic orbitals. The electron filling is based on Aufbau principle.

Bromine is 35th element in periodic table. It is a non  metal in the halogen group - group 17. Thus it has a total of 35 electrons. Hence, its electronic configuration is, 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁵.

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Answer: you will need 400 potatoes

Explanation:

Low reaction are helpful where you need the reaction to take place at slower pace meaning the combination of the molecules is slow.

A reaction rate is the pace at which a chemical reaction occurs. A low rate reaction indicates that the molecules mix at a slower pace than a high rate reaction. Some reactions can take hundreds, if not thousands, of years to occur, whilst others can occur in less than a second.

Consider how long it takes plants and old fish to become fossils if you want to conceive about an extremely slow reaction (carbonization). The pace of reaction is also affected by the type of molecules merging. The reaction will be delayed if a key element or molecule is present in low amounts.

Another important concept for reaction rates is collision theory. According to collision theory, when more collisions occur in a system, more combinations of molecules will bounce into each other. There is a greater likelihood that the molecules will complete the reaction if there are more potential combinations. The reaction will occur faster, implying that the pace of the reaction will grow.

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THIS IS UR ANSWERPLS MARK ME AS BRAINLIEST..

Water is an excellent solvent for most ionic compounds and polar covalent molecules but not for non-polar compounds because of its content loaded with certain chemical properties that make it a highly effective solvent. Water molecules are polar, and due to their dipolar nature, the oxygen atom carries a negative charge while the hydrogen atoms carry a positive charge.

The polarity of the water molecule allows it to interact with and dissolve other polar and ionic substances.When an ionic compound is dissolved in water, the ions of the compound dissociate into individual charged species (cations and anions), and these charged species are solvated by water molecules. The polarity of the water molecule allows it to interact with the ions by attracting the positively charged ions to the negative end of the water molecule and vice versa.

The same is true for polar covalent molecules, which have a net dipole moment. Water molecules can interact with these molecules, forming a solvation layer around them. On the other hand, non-polar compounds lack a net dipole moment, so they don't interact with the water molecules. Instead, non-polar compounds interact with each other via van der Waals forces, making it more challenging for them to dissolve in water.

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The given statement is False. It is not difficult to stop the halogenation of ketones under basic conditions at the mono-halogenated stage. The reason behind this is that the bromine, which is used as a halogenating agent, destabilizes the enolate formed during the halogenation process.

The given statement is False. It is not difficult to stop the halogenation of ketones under basic conditions at the mono-halogenated stage. The reason behind this is that the bromine, which is used as a halogenating agent, destabilizes the enolate formed during the halogenation process. Halogenation is a reaction in which a halogen molecule (fluorine, chlorine, bromine, or iodine) is added to a compound. The reaction is widely used for the industrial and laboratory-scale synthesis of a variety of organic compounds. During the reaction, the halogen molecule breaks apart, forming halogen radicals that attack the target compound. This reaction is also known as a radical reaction.

The halogenation reaction of ketones is generally carried out in the presence of a base such as sodium hydroxide (NaOH) or potassium hydroxide (KOH). The reaction of ketones with bromine under basic conditions yields enolate ions. The first step involves the formation of the enolate ion by the deprotonation of the ketone. In the next step, the enolate ion attacks the halogen molecule, resulting in the halogenation of the ketone. The mono-halogenated product can be obtained by stopping the reaction after the first halogenation step. The acidic nature of the product is less than that of the starting ketone. Therefore, it is easy to stop the reaction at this stage. So, the statement is false.

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The analytical method to determine the concentration of a solution is called titration.

In this method, a solution of unknown concentration is reacted with a solution of known concentration, called a titrant, until a reaction endpoint is reached. The reaction is usually monitored by adding an indicator to the solution, which changes color when the endpoint is reached.

The volume of the titrant used to reach the endpoint is used to calculate the concentration of the unknown solution using stoichiometry and the known concentration of the titrant. Titration is commonly used in chemistry to determine the concentration of acids, bases, and other chemical species in a solution.

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Answer:

Writing an efficient conclusion in a report involves summarizing the main findings or outcomes of the report and offering a final perspective on the subject matter. Here are some tips for writing an efficient conclusion in a report:

Remember, an efficient conclusion should be brief and to the point. It should summarize the main points of the report and provide a clear and concise perspective on the subject matter.

The ground-state electron configurations of oxygen, sulfur, and selenium are 2-8-8, 2-8-6, and 2-8-8-6 respectively. Oxygen and selenium both have 8 electrons in their outermost shell, while sulfur has 6.

This difference affects the chemical and physical properties of these elements, as elements with more electrons in their outermost shells tend to be more reactive due to increased electron availability for bonding.

As oxygen and selenium have the same number of electrons in their outermost shell, they have similar chemical and physical properties. Sulfur, with its fewer outer shell electrons, has different chemical and physical properties than oxygen and selenium.

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Answer:

A A B

Explanation:

I know that when it is slopped it is 90% always accelerating

Answer: Oxaloacetate

Answer:

Oxaloacetate

Explanation:

At the end of this series of reactions, the four-carbon starting molecule, oxaloacetate, is regenerated, allowing the cycle to begin again. In the first step of the cycle, acetyl CoAstart text, C, o, A, end text combines with a four-carbon acceptor molecule, oxaloacetate, to form a six-carbon molecule called citrate.

Answer:

b. 62 g, which should equal the total mass of the products

Explanation:

According to the law of conservation of mass, which states that mass of a substance can neither be created nor destroyed, hence, the mass of the reactants of a reaction must be equal to the mass of the products in that reaction.

As stated in this question, if the total mass of reactants is 62g, then, in accordance to the law of conservation of mass, the total mass of products should also be equal to 62g.

During the product isolation portion of the reaction, extracting the reaction mixture with NaHCO3(aq) can accomplish a few things depending on the specific reaction.

One potential goal is to neutralize any remaining acid or base used in the reaction, which can help prevent unwanted side reactions or stabilize the product. Another goal could be to selectively extract the product from the reaction mixture by exploiting differences in solubility between the product and the other components in the mixture. NaHCO3(aq) can act as a weak base and selectively extract acidic compounds from the mixture, which can then be separated from the other components by filtration or other means. Finally, NaHCO3(aq) can also act as a washing agent to remove impurities or unwanted side products from the reaction mixture.

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Answer:

A pH calibration is the process of adjusting your pH meter by measuring solutions of a known pH value. This is because the characteristics of your electrode will change over time and this needs to be compensated for. A calibration does this by matching your pH meter to the current characteristics of your pH sensor.

Explanation:

The period of repolarization is a refractory period

The refractory period of a neuron is the period after the neuron has fired an action potential during which it cannot respond to a second stimulus. This is because the neuron is repolarised, during which the electrical and chemical changes that took place during the action potential are reversed. Once the refractory period has passed, the neuron can then fire another action potential in response to a new stimulus.

The length of the refractory period varies depending on the type of neuron and the specific stimulus that was received. Generally, the refractory period is relatively short, lasting only a few milliseconds. This allows neurons to fire multiple action potentials in rapid succession, enabling the rapid transmission of information throughout the nervous system.

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The true statement is: It took the car the same amount of time to travel the first 10 meters as it did to travel the last 10 meters (Option C)

The following data were obtained from the question:

Now, we shall determine the time taken to travel the first 10 m. This is shown below:

Next, we shall determin the time taken to travel the last 10 m. This is shown below:

From the above illlustration, we can see clearly that it took the car the same time to travel the first 10 m and the last 10 m.

Thus, the true statement is option C: It took the car the same amount of time to travel the first 10 meters as it did to travel the last 10 meters

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Answer:

c. reduces the concentration of the hazardous material in the air.

Explanation:

Pollution can be defined as the physical degradation or contamination of the environment through an emission of harmful, poisonous and toxic chemical substances.

Particulate population is a form of pollution that is responsible for the degradation of the environment.

Particulate matter is also referred to as particle pollution or atmospheric aerosol particles and it can be defined as a complex microscopic mixture of liquid droplets and solid particles that are suspended in air. Other forms of particle pollution includes space debris and marine debris.

Some examples of particulate pollution are dusts, soot, dirt, smoke, etc.

Basically, various anthropogenic activities such as construction and agriculture are primary sources of particulate matter because they're capable of causing particle pollution on their own. The other sources of particle pollution is the secondary source which includes factories, cars, trucks, etc.

Vapor dispersion can be defined as a process which is typically used for removing particle pollutants from the atmosphere through the use of vapor or steam.

Hence, vapor dispersion when adopted, reduces the concentration of the hazardous material such as soot, dusts, smoke, etc., in the air.

Molecules in a solid are harder than molecules in liquids or gases.

The hardness of molecules in a substance is determined by the strength and stability of their intermolecular forces. In solids, molecules are closely packed and held together by strong intermolecular forces, such as ionic bonds, covalent bonds, or metallic bonds. These forces restrict the movement of molecules, making them more rigid and difficult to deform compared to molecules in liquids or gases. In contrast, molecules in liquids and gases have weaker intermolecular forces and greater freedom of movement, allowing them to flow and change shape more easily.

The statement highlights the difference in molecular behavior between solids, liquids, and gases. The close arrangement and strong intermolecular forces in solids result in greater hardness and resistance to deformation compared to the more fluid and less structured molecules in liquids and gases. Understanding these distinctions is essential in various scientific disciplines, including materials science, chemistry, and physics.

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Taking into account the Newton's second law, the correct answer is the last option: the force needed is 270 N.

In first place, acceleration in a body occurs when a force acts on a body, and two factors influence the acceleration of an object: the net force acting on it and the mass of the body.

Newton's second law states defines the relationship between force and acceleration mathematically.

This law says that the acceleration of an object is directly proportional to the sum of all the forces acting on it and inversely proportional to the mass of the object.

Mathematically, Newton's second law is expressed as:
F= m×a

where:

In this case, you know:

Replacing in the Newton's second law:

F= 54 kg× 5 m/s²

Solving:

F= 270 N

Finally, the correct answer is the last option: the force needed is 270 N.

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