which theory explains how glacial material can be observed today near sea level at the equator, even though sea level glaciers probably never existed there

The mass of NaCl would be required to prepare this solution is measured as 251.3 g

Volume of the solution = 2.00 L

Molarity of the solution = 2.15 M

Mass of NaCl needed = molarity  × volume × molar mass

                                   = 2.15 × 2 × 58.44 g

                                   = 251. 292 g

                                   = 251. 3 g

Steps of formation of solution :

Step 1 :  Measure out the desired amount of NaCl  .

Step 2 :  Add the measured NaCl into 2.00 L volumetric flask  .

Step 3 :  partially filled the flask with water .

Step 4 :   Mix until NaCl dissolve completely .

Step 5 :   Dilute the solution , slowly by water until desired volume is reached.  

Three steps are envisioned energetically for the solid's dissolution into a solvent to form a solution. Step 1: the process of breaking a pure solid into smaller pieces. Step 2: Division of unadulterated dissolvable into isolated particles. Step 3: creating a solution by combining the particles.

The straightforward response is that the solute and solvent must have comparable intermolecular interactions. When this is the case, the solvent and solute can easily mix so tightly that each solute particle is surrounded by other solute particles, creating a solution.

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The number of moles of water that would be produced will be 4 moles

From the balanced equation of the reaction:

2H2 + O2 ---------> 2H2O

Mole ratio of H2 and H2O = 2:1

Mole of H2 = 8 moles

Equivalent mole of H2O = 8/2

                                         = 4 moles

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It is important to allow each spot added to the chromatography paper to dry completely before adding another spot in order to allow even separation of the solutes.

Chromatography is the biological technique used to separate the constituent solutes of a solution using a stationary medium and a moving phase.

There are different types of chromatographic procedure including;

In paper chromatography, paper is used as the stationary medium. It is however, important to allow each spot added to the chromatography paper to dry completely before adding another spot in order to allow even separation of the solutes.

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One method that delivers nonsynchronous energy to the myocardium is defibrillation.

A high-energy electric shock is administered to the heart during defibrillation, a medical operation used to treat life-threatening arrhythmias such as ventricular fibrillation or pulseless ventricular tachycardia and return the heart to a normal rhythm.

A regulated electric shock to the heart is given during defibrillation using an external defibrillator or an internal defibrillator (implanted cardioverter-defibrillator). The goal of the shock is to depolarize the myocardium and stop any aberrant electrical activity so that the heart can resume its regular rhythm.

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The acid-catalyzed hydration of chloral to form chloral hydrate involves the addition of water to chloral in the presence of an acid catalyst.

One possible mechanism is as follows:
1. Protonation: The acid catalyst, such as sulfuric acid (H2SO4), donates a proton (H+) to chloral, forming a chloral cation.
2. Nucleophilic attack: Water, acting as a nucleophile, attacks the positively charged carbon atom of the chloral cation.
3. Formation of a tetrahedral intermediate: The nucleophilic attack results in the formation of a tetrahedral intermediate.
4. Deprotonation: Another water molecule acts as a base and removes a proton from the tetrahedral intermediate, forming chloral hydrate.
5. Regeneration of the acid catalyst: The acid catalyst is regenerated in the last step of the reaction, allowing it to participate in further acid-catalyzed hydrations.

The base-catalyzed hydration of acetone to form acetone hydrate follows a different mechanism. One possible mechanism is:
1. Deprotonation: The base catalyst, such as hydroxide ion (OH-), removes a proton from acetone, resulting in the formation of the enolate ion.
2. Nucleophilic attack: Water, acting as a nucleophile, attacks the carbon atom of the enolate ion.
3. Protonation: Another water molecule donates a proton to the oxygen atom of the resulting alkoxide ion, forming acetone hydrate.
4. Regeneration of the base catalyst: The base catalyst is regenerated in the last step of the reaction, allowing it to participate in further base-catalyzed hydrations.
These mechanisms illustrate how acid or base catalysis can facilitate the addition of water to chloral and acetone, respectively, forming chloral hydrate and acetone hydrate. Each step in the mechanisms is crucial for the overall reaction to occur efficiently.

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Answer:

yes if big  no if weak

Explanation:

According to new research, a large earthquake can not only cause other quakes, but also large ones on the opposite side of the Earth.

An earthquake is a sudden movement of rock materials beneath the earth's surface that causes a weak to violent shaking of the ground. The earthquakes are caused by tectonic plate boundaries.

Every day, earthquakes occur all over the world, along both tectonic plate edges and interiors. Earthquakes happen along faults, which are fractures in the rock that allow the blocks to move relative to one another.

Earthquakes are typically caused by underground rock suddenly breaking and rapid movement along a fault. The seismic waves that cause the ground to shake are caused by this sudden release of energy.

A large earthquake can not only cause other quakes, but also large ones on the opposite side of the Earth, according to new research.

Thus, it is possible for an earthquake at this same location to be basically felt where you live.

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Answer:

Smaller Atomic Radius, High Ionization Affinity, and High Electron Affinity

[Note:  It is Br2, not B2, the bomber]

Explanation:

a) Smaller Atomic Radius  YES  Each of these elements have a high number of electrons that nearly fill the lower energy orbitals, forcing the protons in the nucleus to cluster togeter more tightly.

b) High Metallic Character NO

c) High Ionization Energy    YES  - They want to keep their electrons, so the ionization energy is high.

d) High Electron Affinity  YES  They attract electons from anything that comes nearby.

The mass of the solid produced in this reaction is approximately 20.07 grams.

To find the mass of the solid produced, we need to determine the limiting reactant and the stoichiometry of the reaction. The balanced chemical equation for the reaction between sodium phosphate (Na3PO4) and barium chloride (BaCl2) is:

3Na₃PO₄ + 2BaCl₂ -> Ba₃(PO₄)₂ + 6NaCl

First, we need to calculate the moles of each reactant:

moles of sodium phosphate (Na₃PO₄) = volume (L) x concentration (mol/L)
= 0.500 L x 0.200 mol/L
= 0.100 mol

moles of barium chloride BaCl₂ = volume (L) x concentration (mol/L)
= 0.400 L x 0.264 mol/L
= 0.1056 mol

Next, we need to determine the limiting reactant. The reactant with the smaller number of moles is the limiting reactant.

In this case, sodium phosphate (Na₃PO₄) has fewer moles (0.100 mol) than barium chloride ( BaCl₂) (0.1056 mol). Therefore, sodium phosphate is the limiting reactant.

According to the balanced chemical equation, the stoichiometry between sodium phosphate and barium phosphate is 3:1. This means that for every 3 moles of sodium phosphate, we will obtain 1 mole of barium phosphate.

Using this ratio, we can calculate the moles of barium phosphate formed:

moles of barium phosphate (Ba₃(PO₄)₂ ) = moles of sodium phosphate x (1 mole of (Ba₃(PO₄)₂ / 3 moles of Na₃PO₄)
= 0.100 mol x (1/3)
= 0.0333 mol

Finally, we can calculate the mass of the solid produced using the molar mass of barium phosphate ((Ba₃(PO₄)₂), which is 601.92 g/mol:

mass of barium phosphate = moles of barium phosphate x molar mass
= 0.0333 mol x 601.92 g/mol
= 20.07 g

Therefore, the mass of the solid produced in this reaction is approximately 20.07 grams.

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The characteristic of a Mixture is two or more elements coming together such as water (H2O) & Sugar Particles. If you mix these together you get a Mixture.

For the chemical reaction, 2HBr (aq) +Ba(OH)2​→2H2​O(l)+BaBr2​(aq), the net ionic equation is 

2H+(aq)+2Br-(aq)+Ba+2(aq)+2OH-(aq)---> 2H2O(l)+Ba+2(aq)+   

The only molecules or ions that are actively participating in the reaction or those that change are included in a net ionic equation. The ions of the spectator are absent from this equation. You can get this equation by leaving out the spectator ions from the full ionic equation. We emphasize the molecules that change in the process by using net ionic equations. It makes it simple to identify the chemicals that are driving a reaction. 

2HBr (aq) +Ba(OH)2​→2H2​O(l)+BaBr2​(aq) 

2H+ + Br2- + Ba+ +2OH-  à 4H+ +2O2- +Ba+  +Br2-

The net ionic equation can be written using the entire ionic equation. We start by determining the spectator ions.The spectator ions will have the same charge and state of matter in the reactants and products when examining the entire ionic equation. The bromine ion and the barium ion remain unchanged during this reaction. These are regarded as spectator ions as a result. We are left with the net ionic equation after removing the spectator ions. The following equation's net ionic formula is 

2H+(aq) + 2OH-(aq) -> 4H+(1)+2O22.   (1)

Charge on the left: +2 + (2) = 0. 

+4+(4)=0 for the right-side charge. 

The ionic equation is balanced. 

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The system's final temperature is 295 °C, or 71.33 °F. To calculate the metal's heat capacity, use Q = smT. (Be remember to factor in the metal's mass, its mass in heat, and its change in temperature.

The following equation can be used to determine specific heat, abbreviated Cp: Cp=QmΔT When m is the material's mass, Q is the quantity of heat energy delivered to the substance, & T is the temperature change of the substance, we can write C p = Q m T.

Any type of calorimeter must be used in the laboratory to measure specific heat. A calorimeter is an insulated container with the ability to track changes in energy. To minimise energy gain or loss to or from the environment, the calorimeter is insulated.

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Answer:

halogen is the name of group 17 on the table of elements

Answer:

As the atomic number increases, the atoms get bigger. Their chemical properties change just a little bit when compared to the element right above them on the table.

Explanation:

yes

The height of the given iron plate is 20.41m

Potential energy is the energy that is acquired  by an object due to its position or configuration. If we consider that 'm' to be the mass of the object and it is placed at a height 'h' above the horizontal surface, then the P.E. , 'P' of the thing is given by the equation:

                          P = mgh

where, g is that the acceleration due to gravity.

From the above equation height could be calculated as:

                         h = P /mg

From the question it might be clearly seen that,

   P = 2000 J ; m = 10 Kg and allow us to consider g = 9.8 m/s²

            h = 2000 / (10 * 9.8)

         ∴ h = 20.41 m

Therefore, the height of the given iron plate is 20.41m

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We can synthesize acetaminophen from benzene. Please note that the specific reagents and reaction conditions may vary depending on the desired biologically active compound.

To synthesize a biologically active compound from benzene, we need to plan a reaction sequence using appropriate reagents. Let's consider an example where we want to synthesize acetaminophen from benzene.
Step 1: Convert benzene to nitrobenzene
- Reagent: Concentrated nitric acid (HNO_3) and concentrated sulfuric acid (H_2SO_4)
- Reaction: Nitration
- Mechanism: Benzene undergoes electrophilic aromatic substitution with nitric acid, resulting in the formation of nitrobenzene.
Step 2: Reduce nitrobenzene to aniline
- Reagent: Hydrogen gas (H_2) and a reducing agent like iron (Fe) or tin (Sn)
- Reaction: Reduction
- Mechanism: Nitrobenzene is reduced to aniline by catalytic hydrogenation, using a metal catalyst such as iron or tin.
Step 3: Acetylate aniline to form acetanilide
- Reagent: Acetic anhydride (CH_3CO)_2O
- Reaction: Acetylation
- Mechanism: Aniline reacts with acetic anhydride, resulting in the formation of acetanilide.
Step 4: Convert acetanilide to acetaminophen
- Reagent: Sodium hydroxide (NaOH) and acetic anhydride (CH_3CO)_2O
- Reaction: Hydrolysis and acetylation
- Mechanism: Acetanilide undergoes hydrolysis with sodium hydroxide to form aniline. The resulting aniline is then acetylated using acetic anhydride, resulting in the formation of acetaminophen.

By following this reaction sequence, we can synthesize acetaminophen from benzene. Please note that the specific reagents and reaction conditions may vary depending on the desired biologically active compound.

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Answer:

Explanation:

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

mass = Density × volume

From the question we have

mass = 75 × 2.86

We have the final answer as

Hope this helps you

The dz2 and the dx2-y2 orbitals have lobes that point directly at the ligands in a square-planar crystal field in d orbitals.

The d orbitals are a set of atomic orbitals found in the second energy level (n = 2) of an atom. They have a higher energy than the s and p orbitals in the first energy level (n = 1), and are represented by the letters d, dx, dy, dz and dxy, dxz and dyz.The d orbitals are composed of four orbitals which are degenerate (having the same energy) in an isolated atom. But when an atom is in a compound, the d-orbitals split into different energy levels due to the influence of the electrostatic forces of the neighboring atoms. This is called the crystal field splitting, which depends on the symmetry of the crystal and the coordination number of the central atom.

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Valine would be expected to have a 1 charge at a pH below its isoelectric point.

The isoelectric point (pI) of an amino acid is the pH at which it carries no net electrical charge. Above the pI, the amino acid tends to carry a negative charge, while below the pI, it tends to carry a positive charge.

Valine, like other amino acids, has a unique pI. The specific pI of valine depends on its side chain and the surrounding environment. However, since the question does not provide the pI of valine, we cannot determine the exact pH at which valine would have a 1 charge.

Nevertheless, based on the given information that the pH of valine is 6.0, we can infer that the pH of 6.0 is likely below the pI of valine. This is because at pH 6.0, valine would still carry a net positive charge (1 charge) due to the excess of protons (H+) in the solution. At the pI or a pH higher than the pI, valine would have a net negative charge.

To determine the precise pH at which valine would have a 1 charge, the pI value of valine would be required.

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Answer:

A brick of salt measuring 10.0 cm x 10.0 cm x 2.00 cm has a mass of 433 g. What is its density? Step 1: Calculate the volume. V = lwh = 10.0 ...

Missing: Dam/ ‎43.0

Each organ system performs specific functions for the body, and each organ system is typically studied independently. However, the organ systems also work together to help the body maintain homeostasis. For example, the cardiovascular, urinary, and lymphatic systems all help the body control water balance.

Answer:

384399861 meters

Explanation:

Answer:

B

Explanation:

At the transition stage, one form of matter starts getting converted into another form of matter.

Solid, liquid and gas are the three phases in which matter occur in nature. Matter is interconvertible in nature i.e it can be converted from one form to another.

Melting, freezing and evaporation are the three phases of transition.

Liquid water at low temperature freezes to form solid ice. This process is known as freezing. Whereas, liquid water when provided high temperature or heat releases vapours. This process is known as evaporation. Solid ice when brought at room temperature gets converted back into liquid water. This process is known as melting.

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Yes, an atom's nucleus is held together by the strong nuclear force. The strong nuclear force is a fundamental force of nature that binds together protons and neutrons in the nucleus.

This force acts over a very short range and is much stronger than the electrostatic force of repulsion between the protons. The strong nuclear force is responsible for keeping the protons and neutrons together in the nucleus, and it is also responsible for binding together the nucleons to form the nucleus of an atom.

This force is also responsible for the stability of the nucleus, as it helps counteract the electrostatic force of repulsion between the protons. The strong nuclear force is also responsible for the binding energy of the nucleus, and it is this energy that holds the nucleus together.

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Answer:

Explanation:

i may be wrong but i think its b

Answer:

B Ndaira is right for real

Answer:

Explanation:here’s the diagramm somebody help

The substance which will be the best for neutralizing stomach acid is Antacid.

Antacids are medications that counteract (neutralize) your stomach's acid to ease heartburn and indigestion.

Heartburn, indigestion, and upset stomach can be treated with antacids, which neutralize stomach acid.

Some antacids have been used to treat diarrhea and constipation. Marketed antacids include sodium, calcium, magnesium, or aluminum salts.

They are available without a prescription from pharmacies and stores and come in liquid or chewable tablet form.

Therefore, The substance which will be the best for neutralizing stomach acid is Antacid.

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The reaction depicted in option D would not occur.

We know that a chemical reaction has to do with the interaction between species that are combined in a system. As the interaction is taking place, there would be a rearrangement of the atoms of the substance and a recombination of the atoms so as to obtain the products.

We can see that the kind of reaction that we are have here is a single replacement reaction. This implies that one of the species is replaced by the specie with which it reacts.

This is only possible if it is reactaing with a specie that is higher than it in the electrochemical series of the elements. The reaction in option D would not occur because the bromine is less than the chlorine in the electrochemical series.

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Answer:

its 25

Explanation:

Answer:

your answer should be c i had this qs before

Explanation: