compound that increases the number of hydronium ions when dissolved in water is called?

The correct option is D as when sterilizing laboratory equipment with ethanol and a flame, neither option A nor option C should be done.

To reduce the chance of accident or fire when sterilizing lab equipment using ethanol and flame, it is important to follow the correct safety procedures. It is important to keep the alcohol completely away from the flame, not just as far away as possible. When exposed to an open flame, even small amounts of vapor from ethanol can catch fire.

It is also unwise to point the tip of the sterilizing tool upwards as given in option C. Any leftover ethanol may collect at the tip of the tool if it is held with the tip up, which increases the chance of flaring or igniting when it comes in contact with the alcohol.

Therefore, the correct option is D.

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Answer:

Heterogeneous

Explanation:

Answer:

This is confused because they don't have choices

Answer:

If the organ systems do not work together, then homeostasis is not maintained. If homeostasis is not maintained, the cells of the body will not work properly. As a result, the body will not work properly.Feb 4, 2017

Explanation:

Answer:

If the organ systems do not work together, then homeostasis is not maintained. If homeostasis is not maintained, the cells of the body will not work properly. As a result, the body will not work properly.

Explanation: Edge 2020 :)

Answer:

2-carbohydrate

Explanation:

Sucrose belongs to the carbohydrate family. It is a disaccharide which is derived from the condensation of glucose and fructose.

Sucrose is a specific type of organic compound classified as a carbohydrate and the correct option is option 2.

Carbohydrates are essential biomolecules made up of carbon, hydrogen, and oxygen atoms. Sucrose, also known as table sugar, is a disaccharide formed by the chemical bonding of one glucose molecule and one fructose molecule.

Plants produce sucrose through photosynthesis and use it as a readily available source of energy. When consumed by animals, including humans, sucrose is broken down into its constituent monosaccharides to provide fuel for various cellular processes.

Thus, the ideal selection is option 2.

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Answer:

Explanation:

The acceleration of an object given it's mass and the force acting on it can be found by using the formula

\(a = \frac{f}{m} \\ \)

f is the force

m is the mass

From the question we have

\(a = \frac{8}{2} \\ \)

We have the final answer as

Hope this helps you

Answer:

The final state of the hydrogen atom is ground state after the emission of the photons.

The given parameters;

wavelength of the photon absorbed, λ₁ = 92.05 nm = 92.05 x 10⁻⁹ m

wavelength of the photon emitted, λ₂ = 1736 nm = 1736 x 10⁻⁹ m

The change in the energy of the photon is calculated as follows;

ΔE = hf₂ - hf₁

The new energy level is calculated as follows using Borh's model;

Thus, the final state of the hydrogen atom is ground state after the emission of the photons.

Explanation:

Answer:

an ideal gas does not exist except as a conceptual notion, an ideal. Physicists and chemists idealized the behaviour of real gases so that they could explain these phenomena. Under conditions of low pressure and high temperature, all gases behave like real gases, even gases such as UF6 .

Answer:

True

Explanation:

Answer:

+ 100 Kj

Explanation:

The very minimum energy required to activate atoms or molecules to undergo chemical transformation.

Answer:

It is 60kj.

Explanation:

It is the highest point minus where a+b is at, so it is 60kj.

Clean the chemicals and any affected garments with care. With as much fresh water as you can, rinse the afflicted region.

If this substance comes in touch with your skin, wash it off right away with water and soap. If this substance seeps through your clothing, take it off right away and wash your skin with water. After cleaning, seek medical assistance if the discomfort continues.

Gently rinse it out with water or sterile saline solution, if possible (available in local pharmacy). You can accomplish this by holding a glass or small water jug near the eye and gradually dripping waters or saline over eyeball. Flushing should clear your eye of any foreign objects.

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The atom ²²³⁸⁷Fr (Francium-223) decays to ²²³⁸⁸Ra (Radium-223) by emitting beta-minus (β-) nuclear radiation.

During alpha decay, an atom emits an alpha particle, which consists of two protons and two neutrons. In this case, the atom 22387fr 87 223 f r has too many protons, making it unstable. To become more stable, it emits an alpha particle, which reduces its atomic number by two and its atomic mass by four. The resulting atom, 22388ra 88 223 r a, has a more balanced number of protons and neutrons, making it more stable.

In this decay process, a neutron in the Francium-223 nucleus is converted into a proton, causing the atomic number to increase by 1, while the mass number remains unchanged. This results in the formation of Radium-223. During this conversion, a beta-minus (β-) particle, which is essentially an electron, is emitted as a form of nuclear radiation.

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Answer: The SI unit for force is Newtons (N).

Answer:

Natural selection says that either they evolve differently and increase their biodiversity or they die. Both wouldn't have enough food to survive so animals with those traits would become less and less common. ... Natural Selection can also decrease the biodiversity.

Answer: Increase their biodiversity or they die

Explanation:

Both wouldn't have enough food to survive so animals with those traits would become less and less common. ... Natural Selection can also decrease the biodiversity.

Graphite has a higher entropy than diamond, which is again a result of the dense crystal lattice of diamond. In comparison to the graphite structure, it is far more organized.

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The statement that best describes what is happening in the following reaction is this is not a redox reaction, It is an example of combustion (option A).

A combustion reaction is a reaction wherein a substance is combined with oxygen, usually at high temperature, releasing heat.

According to this question, octane undergoes a combustion reaction to produce carbon dioxide and water as follows: 2C8H18 + 25O2 = 16CO2 + 18H2O

Therefore, the statement that best describes what is happening in the following reaction is this is not a redox reaction, It is an example of combustion.

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Answer:

A: This is not a redox reaction. It is an example of combustion.

Explanation:

Answer:

Producer gas and water gas contain carbon monoxide and hydrogen.

C. If  blood pressure decreases, filtration in the kidneys decreases.

D. If more blood returns to the heart, the ventricles contract more forcefully to pump it out, and this raises blood pressure.

The maintenance of blood pressure is defined as the high use of sodium in your diet and the low use of potassium in your diet can cause hypertension. It is also important to use those foods which are free from fats. It is also important that we should use fruits, vegetables, and grains in excessive amounts for the maintenance of blood pressure and for a healthy diet.

High blood pressure 190/110 mm Hg can cause the main vital organs of the body like the brain, heart, and kidney too. There are three factors that contribute to blood pressure which are resistance, blood viscosity, and blood vessel diameter.

So we can conclude that blood pressure is the pressure of circulating blood against the walls of the blood vessels.

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Which of the following statements are true of the maintenance

of blood pressure (BP)? (Read carefully and select all of the correct statements.)

A. Norepinephrine stimulates vasoconstriction in skin, viscera, and skeletal muscles, all of which lower BP.

B. Aldosterone stimulates the reabsorption of Na+ ions by the kidneys, which lowers BP.

C. If BP decreases, filtration in the kidneys decreases.

D. If more blood returns to the heart, the ventricles contract more forcefully to pump it out, and this raises BP.

E. If BP decreases, the kidneys secrete the enzyme renin, which stimulates the secretion of epinephrine to prevent a further decrease.

F. The hormone ANP increases the excretion of K+ ions by the kidneys, which helps conserve water and raise BP.

G. The hormone ADH helps the kidneys conserve water and helps prevent a decrease in BP.

H. The elasticity of the large arteries helps decrease diastolic BP.

Answer:

Electrons are shared in pairs!

Explanation:

I'm doing learning about  Covalent Bonding too:)  

Among the options given, the compound for which ΔH°f (standard enthalpy of formation) is not zero is option b) (graphite).

ΔH°f represents the enthalpy change that occurs when one mole of a compound is formed from its constituent elements in their standard states. In this case, the standard state of carbon is graphite.

For option a) O2(g), the standard enthalpy of formation is indeed zero because oxygen gas in its standard state is considered the reference point for enthalpy calculations.

Similarly, for option c) N2(g) and option e) Cl2(g), the standard enthalpy of formation is also zero since nitrogen gas and chlorine gas in their standard states are used as reference points.

For option d) F2(s), the standard enthalpy of formation is also zero because fluorine gas is considered the standard state for enthalpy calculations.

However, for option b) c(graphite), the standard enthalpy of formation is not zero because the standard state of carbon is not graphite. Instead, the standard state of carbon is typically taken as diamond.

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Answer: 16.7 KJ of heat

Explanation:

The heat required to melt the popsicle can be calculated using the equation:

q = nΔH

where q is the heat required, n is the number of moles of the substance being melted, and ΔH is the enthalpy of fusion.

To find the number of moles of the popsicle, we need to divide the mass by the molar mass:

n = m/M

where m is the mass of the popsicle and M is the molar mass. Since the popsicle has the same molar mass as water (18.0 g/mol), we have:

n = 50.0 g / 18.0 g/mol = 2.78 mol

The enthalpy of fusion of water is 6.01 kJ/mol, so we can calculate the heat required as:

q = nΔH = 2.78 mol x 6.01 kJ/mol = 16.7 kJ

Therefore, 16.7 kJ of heat are required to melt a 50.0-g popsicle at 0°C.

3.6 ×10²⁴ atoms fluorine are in 410 g of UF\(_6\). Fluorine is an atomic number 9 chemical element with both the symbol F.

Fluorine is an atomic number 9 chemical element with both the symbol F. This is the smallest halogen as well as occurs as a very poisonous, pale yellow diatomic vapor under normal circumstances.

It is exceptionally reactive being the most electronegative active catalyst, reacting with all other elements save the light inert.

mole =  410 / 352.02 =1.16mole

number of atom= 1.16× 6.022×10²³=6.98×10²³

number of atom of fluorine =6× 6.98×10²³= 3.6   ×10²⁴ atoms

Therefore, 3.6 ×10²⁴ atoms fluorine are in 410 g of UF\(_6\).

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Answer:

Water molecules pull the sodium and chloride ions apart

Explanation:

The solution is implemented and a monitoring plan is established in the final stages of the FADE approach.

The FADE approach is an acronym for the following stages:

F-Focus

A-Analyze

D-Develop

E-ExecuteIn.

In the FADE approach, the solution is implemented and a monitoring plan is established in the final stages. The execution stage of the FADE approach is where the solution is put into action. At this point, the team will have a well-planned and tested solution that will be implemented in the organization. This stage's primary goal is to ensure that the organization receives the solution, and that everything goes according to plan.

After the solution has been implemented, the organization will begin to see improvements. In the monitoring stage, the focus is on determining whether the solution is successful or not. A monitoring plan is put in place to track the progress of the implementation and determine whether the solution is delivering the desired outcomes.

The goal of the monitoring stage is to make sure that the solution remains effective in the long run.

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The solution is implemented and a monitoring plan is established in the Execute phase.

The Fade approach consists of four critical stages:

F: Focus

A: Analyze

D: Develop

E: Execute

During the Execute stage, the solution is implemented and a monitoring plan is established. This stage is where the developed solution is put into action, marking a transition process involving various processes, activities, and steps to ensure the new system becomes fully functional.

The Execute stage includes the following:

Implementing the solution: This is the stage where the developed solution is put into operation, and the identified process changes are rolled out in stages. The organization must allocate all necessary resources to the project.

Monitoring: Monitoring the effectiveness of the implemented solution is crucial to ensure it achieves its intended purpose. It involves tracking the progress of the new process and assessing its alignment with the expected goals. Monitoring enables the identification of any issues, anomalies, or bottlenecks that may arise, allowing prompt resolutions to avoid process interruptions. This stage also involves establishing a monitoring plan.

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Answer:

It forms 2 single sigma bonds with 2 hydrogen atoms and double (1sigma and 1pi bonds with oxygen atoms. They are convalent

Answer: The correct answer is e) all reactions are at equilibrium.

Explanation: In order for cellular vitality to develop, it is necessary for it to be in energetic balance with the environment, that is, to give and receive energy with the environment that surrounds it through endothermic or exothermic reactions. That is why the development of life is considered a system that constantly exchanges with the environment. In turn, that the cell unit maintains a balance with the environment causes homeostasis to occur among the whole organism.

Question 19: The fusion of hydrogen releases energy because the mass of a helium nucleus is smaller than the mass of four protons.Question 20: Fusion in the core of a stable massive star cannot proceed beyond iron because it would require temperatures that even stars cannot generate.

Question 19 addresses the reason why the fusion of hydrogen releases energy. The correct statement is that the mass of a helium nucleus is smaller than the mass of four protons. This mass difference results in the release of energy during fusion reactions. In fusion, hydrogen nuclei (protons) combine to form helium nuclei, and in the process, some mass is converted into energy according to Einstein's famous equation, E=mc^2. This energy is released in the form of photons, which can be observed as light and heat.

Question 20 explains why fusion in the core of a stable massive star cannot proceed beyond iron. The correct statement is that it would require temperatures that even stars cannot generate. Fusion reactions in stars involve the fusion of lighter elements to form heavier elements, releasing energy in the process.

However, fusion reactions that produce elements heavier than iron require extremely high temperatures and pressures, which are not achievable in the core of a stable massive star. Iron has the highest binding energy per nucleon, meaning that fusion of iron nuclei would require an input of energy rather than releasing energy. As a result, fusion reactions cease beyond the formation of iron in the core of a star.

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