when ethanol (ch3ch2oh) is used as a solvent, the leveling effect will prevent the presence of bases stronger than . select answer from the options below .ethoxide (ch3ch2o-) .water (h2o) .hydroxide (oh-) .ethanol (ch3ch2oh)

B. methylcyclopentane

F. propane

G. n-pentane are the following molecules would a flame ionization detector (FID) be sensitive to after separation on a gas chromatography column.

flame ionization detector(FID) The most used detector in gas chromatography is the flame ionization detector . Since practically all organic molecules include carbon atoms (C), the FID is sensitive to and capable of identifying them. As nitrogen, the primary component of air, won't burn under these circumstances, and chromatography the technology is also insensitive to moisture and carbon dioxide, hydrocarbons in the environment can be found using flame ionization detector (FID).

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Answer:

Land and sea breeze

Explanation:

This uneven warming of the land during the day results in the phenomenon called land and sea breeze.

Answer:

supernova

An exploding star is known as a supernova

Answer:

supernova, plural supernovae or supernovas, any of a class of violently exploding stars whose luminosity after eruption suddenly increases many millions of times its normal level.

The term supernova is derived from nova (Latin: “new”), the name for another type of exploding star. Supernovae resemble novae in several respects. Both are characterized by a tremendous, rapid brightening lasting for a few weeks, followed by a slow dimming. Spectroscopically, they show blue-shifted emission lines, which imply that hot gases are blown outward. But a supernova explosion, unlike a nova outburst, is a cataclysmic event for a star, one that essentially ends its active (i.e., energy-generating) lifetime. When a star “goes supernova,” considerable amounts of its matter, equaling the material of several Suns, may be blasted into space with such a burst of energy as to enable the exploding star to outshine its entire home galaxy.

Supernovae explosions release not only tremendous amounts of radio waves and X-rays but also cosmic rays. Some gamma-ray bursts have been associated with supernovae. Supernovae also release many of the heavier elements that make up the components of the solar system, including Earth, into the interstellar medium. Spectral analyses show that abundances of the heavier elements are greater than normal, indicating that these elements do indeed form during the course of the explosion. The shell of a supernova remnant continues to expand until, at a very advanced stage, it dissolves into the interstellar medium.

                                                                Have a stunning day/night!

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Answer:

Explanation:

Using the formula as follows: mole = mass/molar mass

Molar mass of Ba(NO3)2

= 137 + (14 + 48)2

= 137 + 124

= 261g/mol

Mole = mass ÷ molar mass

0.625 mol = mass/261g/mol

mass = 0.625 × 261

mass = 163g

Answer:

The Answer is ________ Please Make sure You Put it In and Trust Have a wonderful day/Night:)

Explanation:

Answer:

3 is B 4 is the number 3

Explanation:

I hope this helps :D

Answer:

To produce a solution that frees at -50°C we need 1668.5 g of ethylene glycol

Explanation:

Formula for freezing point depression is:

Freezing T° of pure solvent - Freezing T° of solution = Kf . m . i

Our solute is the ethylene glycol, then water is our solvent.

As ethylene glycol is a non ionic compound, i = 1 (Van't Hoff factor, numbers of ions dissolved)

Kf = Cryoscopic constant. For water is 1.86 °C/m

We replace data:

0°C - (-50°C) = 1.86 °C/m . m . 1

To determine grams of ethylene glycol needed, we need to find m (molality)

50°C / 1.86 m/°C = m → 26.8 mol/kg

As this moles of solute are contained in 1kg, definetely we need 26.8 moles of ethylene glycol.

To find the answer, we convert moles to mass:

26.8 mol . 62.07g / mol = 1668.5 g

Answer:

To convert m/sec into mi/hr, multiply the number by 2.236936 and then round off the answer to the required decimal places.

2500 ×2.236936

= 5592.34 mi/hr

Molarity is the molar concentration of the chemical species of the solute dissolved in the solvent. The molarity of the solution when diluted is 0.0257 M.

The molar concentration or the molarity of the solution is inversely proportional to the dilution. An increased dilution will decrease the molarity of the solution.

The molarity is given by:

\(\rm Molarity = \dfrac{\text{number of moles }}{ \text{Volume of the solution in L}}\)

Also, it can be shown as:

\(\rm M_{1}V_{1}= M_{2}V_{2}\)

Given,

\(\rm M_{1}\)  = 0.513 M

\(\rm V_{1}\) = 25 mL

\(\rm M_{2}\) = ?

\(\rm V_{2}\) = 500 mL

Substitute value in the equation as:

\(\begin{aligned} \rm M_{1}V_{1}&= \rm M_{2}V_{2}\\\\0.513 \times 25 &= \rm M_{2} \times 500\\\\\rm M_{2} &= \dfrac{0.513 \times 25 }{500}\\\\&= 0.02565\;\rm M\end{aligned}\)

Therefore, 0.0257 M is the molarity after dilution.

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The sigma bond between the two iodine atoms (\(I-I\)) in the triiodide ion, \(I_3^-\), is made up of a combination of hybridized \(sp^3d\) orbitals on each iodine atom. The  \(sp^3d\)  hybridization results from the mixing of one s, three p, and one d orbital. The approximate i-i-i bond angle in \(I_3^-\) is 180 degrees, indicating a linear geometry.

In the triiodide ion (\(I_3^-\)), each iodine atom (I) is connected to the other two through a sigma (σ) bond.

The sigma bond between two iodine atoms (I-I) is formed by the overlap of one \(sp^3d\) hybrid orbital on each iodine atom with the unpaired electron in the p orbital on the other iodine atom.

The three iodine atoms are positioned in a straight line due to the \(sp^3d\) hybridization of each iodine atom, which results in an arrangement of three orbitals around the central iodine atom

The approximate I-I-I bond angle in triiodide ion is 180 degrees since the molecule has a linear geometry.

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Answer:

Chromatography is the separation of a mixture by passing it in solution or suspension or as a vapor. It's mainly used for separation and analytical study of organic and inorganic mixtures.

Hope this helps :)

Answer:

Chromatography is a laboratory technique for the separation of a mixture. The mixture is dissolved in a fluid called the mobile phase, which carries it through a structure holding another material called the stationary phase.

Explanation:

Answer:

digestive system

.

Explanation:

Water is a liquid while hydrogen sulphide is a gas because the hydrogen bonding in water causes the water molecules to be associated with each other due to intermolecular forces of attraction.

Answer:

Evaporation

Explanation:

The water evaporated when heat was added causing the water to go.

Answer:

When water is heated the molecules move faster and since they vibrate the evaporate.

Explanation:

sciense :)

Color. A substance's changing color does not always mean that something has changed chemically. For instance, altering a metal's color does not alter its physical characteristics.

A substance's shape is a physical attribute, and any modification of a physical property cannot be interpreted as a sign of a chemical modification.

In essence, a physical change does not result in the creation of a new material, whereas a chemical change does.

While undergoing a physical change, a material may change shape or form, but no chemical processes take place, and no new compounds are created.

Therefore, a change in color is not a sign of a chemical reaction.

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When 75.0 mL of 0.20 M CaSO4 solution is mixed with 45.0 mL of 0.35 M Li3PO4 solution, we can determine the theoretical yield of Ca3(PO4)2 and identify the limiting reagent using the principles of stoichiometry and the concept of limiting reactants.

To determine the theoretical yield of Ca3(PO4)2 and identify the limiting reagent, we need to compare the number of moles of CaSO4 and Li3PO4 present in the given solutions. First, we can calculate the number of moles for each reactant by multiplying the volume (in liters) of each solution by its respective molarity. Next, we can write the balanced chemical equation for the reaction between CaSO4 and Li3PO4 to determine the stoichiometric ratio between the reactants and the product.

By comparing the moles of CaSO4 and Li3PO4 and considering the stoichiometric ratio, we can identify the limiting reagent. The limiting reagent is the reactant that is completely consumed and determines the maximum amount of product that can be formed. The reactant that yields the smaller number of moles is the limiting reagent. Once the limiting reagent is determined, we can use its stoichiometric ratio to calculate the theoretical yield of Ca3(PO4)2, which represents the maximum amount of product that can be obtained from the given reactants.

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Answer:

A. The largest value is 7 and the smallest value is 1. Find the difference. 7 - 1 = 6.

Explanation:

Answer:

The atomic number on the Periodic Table will tell you how many protons are in the nucleus of each atom.

Explanation:

number of electrons and protons should be equal in a neutral atom. Because each electron has a -1 charge, and each proton a +1 charge, the number of each must be the same for the net charge to equal zero.

Answer: Ionic attractions

Explanation:

Ionic bonding is a type of chemical bond that involves the electrostatic attraction between oppositely charged ions.

The given chemical reaction:

NAOH Br-CH3 но-CНз + NaBr Hао circle one:

reduction; oxidation; neitherC

The reaction is neither an oxidation reaction nor a reduction reaction. The oxidation state of the Carbon atom in the compound CH3COOH is +3 while the oxidation state of the Carbon atom in the compound CH4 is -4.

The change in oxidation state is not the same for both atoms, indicating that the reaction is neither an oxidation nor a reduction reaction.

Oxidation is the loss of electrons, while reduction is the gain of electrons. When electrons are transferred from one atom to another, oxidation-reduction reactions occur.

Oxidation states can be used to identify whether an atom is oxidized or reduced in a reaction.

The oxidation state of an atom is the charge it would have if all the shared electrons in the bonds were assigned to the atom with the greater electronegativity.

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Answer:

9) Substitution Reaction

10) Covalent Bond

11) Ionic Bond

12) Covalent Bond

13) Ionic Bond

14) 9 atoms

Explanation:

9) Substitution Reaction: Substitution reaction is a chemical reaction in which one atom, ion or species replaced by another atom, ion or species

10) Covalent Bond: Covalent bond is a bond that formed between two nonmetals, when both the species are non metal, the electronegativity of both the nonmetals are comparatively same, hence any of both do not pulls completely electron of other & the bond is formed by the sharing of electron.

11) Ionic Bond: We know that nonmetals have high electronegativity than those of metals, due to high electronegativity non metals pulls the electrons of metals but there is enough interaction that non metal do not escape after pulling the electron, & an ionic bond generates where non metals possess negative charge & positive charge goes to metal.

12) Covalent Bond: The bond formed between two atoms having less electronegativity diffrence by sharing of electron pair is know as covalent bond. for e.g the Carbon - Hydrogen bond in methane (CH4) molecule is covalent bonded because the electronegativity of carbon is 2.5 & that of hydrogen is 2.1 which is almost close, hence the bond formed is covalent.

13) Ionic Bond: The bond formed between two atoms having high electronegativity diffrence & the bond formed is due to complete transfer of electron by one species. For e.g. NaCl the sodium is a metal having electronegativity 0.9 and chlorine is non metal having electronegativity 3.0 the electronegativity diffrence is too high, hence the chlorine behaves as Cl- ion that of sodium as Na+, both the components behaves as ion but they are bonded &that bond is called as Ionic bond.

14) 9 Atoms: One molecule of water (H2O) posses three atoms, two hydrogen atoms & one oxygen atom, the number of atoms in 3 molecules of water 3×3 = 9 atoms.

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solid(particles are appropriately packed)  in solids there is no distance between the constituent particles

liquid(particles are closely packed).

gas(particles move freely) .

In a gas, the particles are evenly spaced out and not in any particular order. There is no regular arrangement of liquid next to one another. solids are regularly arranged and closely packed.

We can infer from the diagram that there is no space between the individual particles that make up solids. Without any intermolecular voids between the individual molecules, it is a completely packed structure.

In contrast, the particles in liquids are more closely packed than those in gaseous fluids, albeit they are more loosely packed than those in solids. We can now observe that there is a significant intermolecular gap between the constituent particles of gases. They are packed more flimsily than

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So,

We want to draw a graph of the melting and boiling points of the elements of the periodic table against the atomic number of each of them.

For this, remember that the metals have properties that makes them have a greater melting and boiling points.

Let me upload the graph here below:

As you can see, the melting temperature of the first six atomic numbers is increasing until we finish in 7. It depends of the characteristic of the element.

If you look at your periodic table, the graph will be something like I posted above.

Gasoline blending in petroleum refineries involves analyzing the properties of different components and determining the optimal mixing ratios to produce gasoline that meets specific octane rating and quality requirements.

Gasoline blending is a critical process in petroleum refineries where different components are combined to produce the desired gasoline product. In this example, the challenge is to blend gasoline from three different components.

To solve the gasoline blending problem, various factors need to be considered such as the desired octane rating, volatility, and environmental regulations. The first step is to determine the optimal proportion of each component based on their individual characteristics. This involves analyzing the properties of each component, such as its research octane number (RON), motor octane number (MON), and vapor pressure.

The second step is to develop a blending strategy that achieves the desired gasoline specifications. This involves determining the appropriate mixing ratios of the three components to meet the target octane rating and other quality requirements. The blending process requires precise calculations and adjustments to ensure the final gasoline product meets the desired specifications.

Additionally, economic considerations play a role in gasoline blending. The cost of each component and the market demand for specific gasoline grades can influence the blending decisions. Refineries aim to optimize the blend to minimize costs while meeting quality standards.

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Answer: your answer is A

Explanation: the atoms has the same properties of the same element as the atomic number.

Part of ecosystem | Contains energy storage molecules? (yes or no) | Energy storage molecules flowing in? (yes or no) | Energy storage molecules flowing out? (yes or no)

Producers | Yes | No | Yes

Consumers | Yes | Yes | Yes

Decomposers | Yes | Yes | Yes

Dead matter | Yes | Yes | Yes

Abiotic matter | No | No | No

In an ecosystem, different components play different roles in terms of energy storage and flow.

Producers, such as plants, have the ability to produce energy-rich molecules through photosynthesis, storing energy in the form of carbohydrates. They do not rely on external sources of energy storage molecules, but they release energy storage molecules into the ecosystem when consumed or when they undergo decomposition.

Consumers, including herbivores, carnivores, and omnivores, obtain energy storage molecules by consuming producers or other consumers. They receive energy-rich molecules flowing into their systems through their diet and release energy storage molecules when they respire or excrete waste.

Decomposers break down organic matter, including dead plants and animals, into simpler substances and release energy storage molecules in the process. They receive energy storage molecules flowing into their systems from the breakdown of organic matter and release energy storage molecules back into the ecosystem.

Dead matter, which refers to organic material that is no longer living, contains energy storage molecules. When dead matter decomposes, the stored energy is released into the ecosystem.

Abiotic matter, which includes non-living components like minerals and gases, does not contain energy storage molecules and does not participate in the flow of energy storage molecules within the ecosystem.

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The equation for the reaction of iron (iii) phosphate with sodium sulfate to make iron (iii) sulfate and sodium phosphate is 2 FePO₄ + 3 Na₂SO₄ ⇒ Fe₂(SO4)₃ + 2 Na₃PO₄.

Each atom on both sides of a balanced chemical equation has the same number and type. A balanced equation's coefficients must have the simplest whole number ratio. In chemical reactions, mass is always conserved.

2 FePO₄ + 3 Na₂SO₄ ⇒ Fe₂(SO4)₃ + 2 Na₃PO₄ this is a balanced chemical equation for iron (iii) phosphate with sodium sulfate to make iron (iii) sulfate and sodium phosphate.

Thus, the reaction is 2 FePO₄ + 3 Na₂SO₄ ⇒ Fe₂(SO4)₃ + 2 Na₃PO₄.

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Nuclear power plants produce electricity using energy from the radioactive decay of uranium-235. Option A is correct.

Nuclear power plants use nuclear reactors to produce heat through a process called nuclear fission, in which the nucleus of an atom is split into two smaller nuclei, releasing a large amount of energy. Uranium-235 is a naturally occurring radioactive isotope of uranium that is used as fuel in nuclear reactors because it undergoes nuclear fission more readily than other isotopes.

Uranium-238 is also used in nuclear reactors, but it must first be converted into plutonium-239 through a process called nuclear transmutation. Plutonium-235 and plutonium-238 are also used as nuclear fuel in certain types of nuclear reactors, but they are produced artificially through nuclear transmutation.

Hence, A. uranium-235 is the correct option.

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Answer:

455.4 mmHg

Explanation:

To solve this problem we can use Gay Lussac's Law, which describe the temperature and pressure of a gas, at constant volume and composition:

In this case:

We input the data:

And solve for P₂:

the phase of the copper product after the reaction in the copper cycle is listed below

1.the heating of Cu(OH)2 to form CuO i.e

Cu(OH)2 (s) ⇒ CuO(s) + H2O (l) which means the product of copper is in a solid phase after the reaction.

2.the addition of NaOH to Cu(NO3)2 to form Cu(OH)2 i.e

Cu(NO3)2 (aq) + NaOH (aq) ⇒Cu(OH)2 (s) + 2NaNO3 (aq) which means the product of copper is in the solid phase after the reaction.

3. the addition of HCL to CuO to form CuCl2 i.e

2 CuO(s) + 2 HCl(aq)  ⇒ 2 CuCl2(aq) + H2O (aq) which means the product of copper is in the aqueous/liquid phase after the reaction.

4. the addition of Al to CuCl2 to form Cu i.e

Al(s) + CuCl2(aq) ⇒ AlCl3(aq) + Cu(s) which means the product of copper is in a solid phase after the reaction.

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