which luquid is known as universal solvent?why?​

Answer:

It seems believable and familiar.

Explanation:

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The command that allows moving a file from one location to another is the "mv command".

The mv command renames or transfers files and folders from one directory to another. A file or directory keeps its base file name when moved to a new directory. All links to other files are preserved when you transfer a file, with the exception of when you move it to a different file system. A directory and its contents are added beneath the existing directory when you transfer a directory into it.

The TargetDirectory option of the mv command allows you to provide a new file name or a new directory path name when renaming a file or directory.

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Answer:

B

Explanation:

Exergonic reactions are also called spontaneous reactions, because they can occur without the addition of energy. ... In this case, the products, or final state, have more free energy than the reactants, or initial state. Endergonic reactions are non-spontaneous, meaning that energy must be added before they can proceed.

Exergonic reactions were often known as spontaneous reaction. since they can take place without the expenditure of energy.

A reaction wherein energy is emitted mostly in presence of light or heat was known as just an exothermic reaction.

What is spontaneous reaction?

A spontaneous process would be one that happens without the system receiving any outside input.

Because exergonic events could proceed without the supply of energy, they are sometimes known as spontaneous reactions. The products possess greater free energy as compared to  the reactants example. Endergonic reactions were non-spontaneous, which means they require the addition of energy before they can begin.

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Answer:

Valence Electron

Explanation:

Valence electron

The outermost electrons that are free to move between atoms in metals is called as Electro positivity.

What do you mean by electropositivity?

"Electropositivity is the propensity of an atom to donate electrons and generate positively charged cations," says the definition. The majority of metallic elements, especially the alkali metals and the alkaline earth metals, exhibit electropositivity.

Example: A strongly electropositive element like sodium, for instance, rapidly gives up an electron to achieve a stable electronic state. Contrarily, chlorine is a very electronegative element that rapidly receives an electron to form a stable octet. In order to produce sodium chloride, sodium and chlorine can thus create an ionic connection (an ionic salt with the chemical formula NaCl).

Hence, the outermost electrons that are free to move between atoms in metals are termed Electro positivity.

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None of the proposed options explain why geothermal energy is a renewable resource. Geothermal energy is considered renewable because it comes from the earth's internal heat, which is constantly generated by the natural decay of radioactive isotopes in the earth's crust and mantle.

None of the option is correct.

This heat is essentially inexhaustible within human time, making geothermal energy a sustainable and renewable source of energy.  Geothermal energy can be used in a number of ways, including  hot water or steam from underground reservoirs to power turbines and generate electricity. This process does not deplete resources because the water or steam is returned to the tank to be heated and recycled.

Geothermal energy is a renewable natural resource because it comes from the earth's internal heat, which is constantly replenished through natural processes. This heat energy is produced by the decay of radioactive substances in the earth's core and  is brought to the surface through the mantle and the earth's crust.

Hence, None of the option is correct.

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The volume of the rectangular box is 250 cubic centimeters (cm³) or 0.25 liters (L).

To find the volume of a box with a length of 5cm, a width of 5cm and a height of 10cm, we use the formula for the volume of a rectangular box, which is given as;Volume of rectangular box = Length × Width × HeightGiven that the length of the box is 5cm, the width is also 5cm, and the height is 10cm.

Therefore, we substitute the values into the formula above;Volume of rectangular box = 5cm × 5cm × 10cm= 250cm³.

Therefore, the volume of the rectangular box is 250 cubic centimeters (cm³).

We can also represent this volume in liters (L) by converting from cubic centimeters to liters, since 1L is equal to 1000cm³.

Thus, to convert 250cm³ to liters;Volume in liters = Volume in cm³ / 1000cm³/L= 250cm³ / 1000cm³/L= 0.25L.

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Answer:

The IUPAC name of above structure is N-Methylethanamine.

Answer: the last one:)

Explanation: energy cannot be destroyed but can be transfered

(called energy transfer).

To confirm the presence of \(\(Pb^2^+\)\) ions, the substance that can be used is potassium thiocyanate (KSCN). Therefore, the correct answer is: e. Potassium thiocyanate

When potassium thiocyanate is added to a solution containing \(Pb^2^+\) ions, it forms a reddish-brown precipitate called lead(II) thiocyanate \((Pb(SCN)^2)\). This reaction is a common test for the presence of \(Pb^2^+\) ions.

The reaction can be represented by the following equation:

\(Pb^2^+\) (aq) + 2 \(SCN^-[/tex} (aq) → \(Pb(SCN)^2\) (s)

In this reaction, the Pb2+ ions from the solution react with the thiocyanate ions (SCN-) to form a reddish-brown precipitate of lead(II) thiocyanate. The formation of the precipitate confirms the presence of \(Pb^2^+\) ions in the solution.

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Answer:

no

Explanation:

For any given isotope, the sum of the numbers of protons and neutrons in the nucleus is called the mass number. This is because each proton and each neutron weigh one atomic mass unit . By adding together the number of protons and neutrons and multiplying by 1 , you can calculate the mass of the atom.

Answer:

No

Explanation:

An element's mass number (A) is the sum of the number of protons and the number of neutrons. Protons and neutrons both weigh about one atomic mass unit or amu. Isotopes of the same element will have the same atomic number but different mass numbers.

Answer:

By dehydrogenation of cyclohexane you may get Benzene as a product. We may use noble metals(Au, Ag, Pt etc.) to dehydration of cyclohexane. Consider following reaction which gives an idea about reaction.

Explanation:

I think it is the correct answer

i have read this in one of the book

Answer:

I think the answer is A.

Explanation:

hope this helps.

Answer:

8368 Joules

Explanation:

Answer:

Using the VSEPR theory, the electron bond pairs and lone pairs on the center atom will help us predict the shape of a molecule. The shape of a molecule is determined by the location of the nuclei and its electrons. The electrons and the nuclei settle into positions that minimize repulsion and maximize attraction.

Answer:

mayori moriti

Explanation:

dot al time

The statement that the amygdala tells your body that it should digest food is false.

Near the base of the brain, the amygdala is a cluster of almond-shaped cells.

One in each hemisphere (or side) of the brain, everyone has two of these cell types.

The amygdala aid in the definition and regulation of emotions.

Thus, the statement that the amygdala tells your body that it should digest food is false.

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Answer:

Earth’s tectonic plates fit together in a jigsaw puzzle of plate boundaries.

The Earth’s outer shell, the lithosphere, consisting of the crust and uppermost mantle, is divided into a patchwork of large tectonic plates that move slowly relatively to each other. There are 7-8 major plates and many minor plates. Varying between 0 to 100mm per year, the movement of a plate is driven by convection in the underlying hot and viscous mantle.

Explanation:

Answer: A

Explanation: According to the Bohr model, often referred to as a planetary model, the electrons encircle the nucleus of the atom in specific allowable paths called orbits. When the electron is in one of these orbits, its energy is fixed.

Answer:

0.1 and 0.2.

Explanation:

The person's blood is 0.1 decreases and become more acidic if it has a pH of 7.3 compared to its preferred 7.4 while on the other hand, the person's blood is 0.2 increases and become more alkaline it has a pH of 7.6rather than its preferred 7.4. There is 0.1 decrease and 0.2 increase in the pH of the person's blood. If the pH decreases so it means it moves towards more acidic whereas, if the pH increases there is moves towards alkaline.

Solution :

Sir Isaac Newton was a great scientist. The discoveries of the Newton change the way we see the world. Newton gave us the fundamental principles through which the entire universe is governed.

Newtons 1st law of motion states that a body moves or stays in position until and unless an external force is applied to the body.

This is the law of nature.

An example which do not support this law can be a body having a huge mass and a small boy applies force to move it but is unable to move the body.

The coordination number of chloride ions is six because each chloride ion is surrounded by six sodium ions.

Rock salt structure is another name for the cubic crystal structure of sodium chloride, or NaCl. The face-centered cubic (FCC) lattice of the structure places each sodium ion (Na+) at the center of an octahedron formed by six chloride ions (Cl-), and vice versa.

Since the coordination number of sodium ions in the crystal structure of sodium chloride is 6, each sodium ion is surrounded by six chloride ions.

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Answer:

The answer is metals

"the number of ions produced by one formula unit of the electrolyte," refers to the van't Hoff factor (i) in an ideal solution of a strong electrolyte. It represents the extent of dissociation of the electrolyte into ions.

In an ideal solution of a strong electrolyte, the van't Hoff factor (i) represents the number of ions that are produced when one formula unit of the electrolyte dissociates completely in the solution. It is a measure of the extent of dissociation of the electrolyte.

For example, for a strong electrolyte such as sodium chloride (NaCl), when it dissolves in water, it completely dissociates into sodium ions (Na+) and chloride ions (Cl-). In this case, the van't Hoff factor (i) would be 2 because one formula unit of NaCl produces two ions (Na+ and Cl-).

Similarly, for other strong electrolytes, the van't Hoff factor (i) can be determined based on the number of ions produced per formula unit. It is important to note that for non-electrolytes or weak electrolytes, the van't Hoff factor (i) is typically less than 1, indicating partial dissociation or no dissociation in the solution.

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Answer:

SCHOOL ON MARS

Explanation:

his post first published on How We Get To Next.

When we dream about the future of education, we think of neural implants, robot tutors and hovering desks.

We don’t treat it as a question of urgency. Technology, not pedagogy or the needs of civilization, animates discussion. This won’t do in a place like Mars, in an atmosphere where, as Elon Musk puts it, “your eyes and skin would peel away like sheets of burning paper.”

Despite the harsh environment, perhaps Musk will turn out to be right and someday you’ll wake up as one of the thousands—or even millions—of settlers sent to Mars to “safeguard the existence of humanity.” Life will be limited, largely cut off from Earth; new supplies will arrive only once every 26 months. Or maybe you’ll wake up on the surface of the Moon, or in a giant spacecraft, suspended in orbit. It’s claustrophobic. Hostile. You can’t go home.

Now, imagine the children of these new pioneers. The ones who will determine the fate and shape of humanity’s future. What will they need to learn to be able to survive? To graduate? To be employable? What will the teachers and classrooms of space look like? What skills will they focus on?

If we are to survive and flourish in this brave new world, we will have to take these questions seriously. We will need to get the best out of every person, learn how to work in harmony with intelligent machines, and ensure that our common history is preserved.

In space, a failing education system will mean the end of humanity.

Let’s think ahead. Let’s ask how the purpose of education — to build community and unleash human potential — can answer the needs of humans in space. We won’t know exactly what that future will look like, but we can make certain assumptions and then work backward from there. By doing so, we’ll glimpse the answers that will prepare us for space (or an increasingly automated Earth).

A few assumptions, then. These space pioneers (whether imagined by NASA in the 1980s or at a TED Talk in 2015) will face a hostile environment. They will need to manufacture or extract all of the essentials — water, food, oxygen from their local environment. Survival will require a constant attention to technology and manufacturing. Everyone will need to contribute.

Pioneers will be limited in communication options. If the ability to communicate with Earth exists, it will depend on lasers and satellites. Otherwise, there will need to be the creation of new networks and satellites.

This future will be isolated. Living areas will be at a premium. There will be a lack of any stabilizing social forces. There will need to be a new code of government. Cut off from their home nations, pioneers will lack the luxury of feuding over cultural or national differences.

So in this void, education will need to do three things:

1. Rapidly equip humans to survive and thrive

Each student will need to quickly contribute to survival and growth. That means effective teaching, invisible assessment and progression based on what you know, not how long you’ve been there. Time will be a scarcity. The idea of measuring learning in hours, sitting still for a three-hour test or waiting 18 to 22 years for a “graduation” will seem ludicrous.

For Gerald Huff, a principal engineer at Tesla Motors, this will mean a mastery-focused environment, an apprentice-oriented education. “Resources that sustain life will be expensive,” said Huff. “It will be a technical environment. Shop class will be part of the basics of life. Think about Star Trek. On a basic level, everyone knew how the ship worked.”

Course work will need to be practical, not just designed to tick a box. Arts and literature will need to be part of real work. We can see the roots of this in the movement of schools offering rigorous, project-based learning. The problem-solvers ensuring that students, such as the ones at London’s School 21, create “beautiful work” offering real meaning to society.

Look to the Conrad Challenge for a model of this type of future education. Established in honor of Charles “Pete” Conrad, the third man to walk on the Moon, the Conrad Foundation challenges students to create solutions that will benefit humanity. Reaching students from over 136 countries, finalists are paired with mentors and led through design thinking.

“To survive in a place completely hostile to the human body, we will need to prepare people differently,” said Nancy Conrad, founder of the foundation. “We will need to build education around competencies, showing what you know. We will also need to provide the frameworks and guidance to prepare people to innovate every single day.”

Students have so far developed a membrane to distill and reuse water in space, a new type of space helmet, and a device to aid people struggling with hand tremors—along with countless other patents, collaborations and new ideas.

Education in space will need to unleash this type of innovation and productivity.

Since the majority of the molecules in this chemical class are created by combining carbon and water, the term "carbohydrate" derives from this.

Only the domain Eukarya contains multicellular, visible organisms like humans, animals, plants, and trees. Many microorganisms, including fungi, algae, and micro-animals, inhabit this region as well. Viruses are nonliving agents, hence they are excluded from the major categories of microorganisms. Single-celled or multicellular eukaryotic creatures are both possible.

There are three domains: Archaea, Bacteria, and Eukarya. Prokaryotic organisms fall under the domains Archaea or Bacteria, while eukaryotic organisms fall under the category Eukarya. Archaea. In terms of size and structure, archaea resemble bacteria but have a greater range of cell forms.A domain, also known as a dominion, superkingdom, realm, or empire, is the highest taxonomic rank that may be assigned to an entire group of organisms in biological taxonomy.

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Explanation:

1m³ = 1L

So 3.5 L = 3.5 m³

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Explanation:

1m³ = 1L

So 3.5 L = 3.5 m³

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Answer:

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

\(volume = \frac{mass}{density} \\\)

From the question we have

\(density = \frac{100}{2.4} \\ = 41.66666...\)

We have the final answer as

Hope this helps you

(a)  0.0025 ml , (b) 2 small bottles of sparkling mineral water would be needed to fill a 1-liter bottle. we need to know the concentration of chlorine in the water and the mass of chlorine present.

Let's assume that the concentration of chlorine in the water is x ppm (parts per million), and that the mass of the chlorine in the bottle is y grams. Then, we can use the following formula to calculate the volume of the water in milliliters:

y (g) =\((x / 10^6)\) * V (ml) * 71 g/mol

where 71 g/mol is the molar mass of Cl2, and the factor of 10^6 converts ppm to parts per unit. Solving for V (ml), we get:

V (ml) = y (g) / [\((x / 10^6)\)) * 71 g/mol]

Without knowing the values of x and y, we cannot calculate the volume of the water. However, if we assume a typical concentration of chlorine in sparkling mineral water (about 0.5 ppm), and a typical size of a small bottle of water (about 500 ml), we can estimate the volume of the water containing the chlorine to be around 0.0025 ml (or 2.5 microliters).

(b) To determine the number of bottles needed to fill a 1-liter bottle, we need to know the volume of each small bottle of sparkling mineral water. Assuming that each small bottle contains 500 ml (a common size for small water bottles), we can calculate the number of bottles needed to fill a 1-liter bottle as follows:

1 liter = 1000 ml

Number of small bottles needed = 1000 ml / 500 ml = 2

Therefore, two small bottles of sparkling mineral water would be needed to fill a 1-liter bottle.

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