Explain how the polarity of the eluent affects the movement of a compound on a tlc plate.

The balanced equation under acidic conditions for the given chemical reaction is:

Mg2+ + Br- + H+ → Mg + BrO3- + H2O

The coefficients of the species shown are:

Mg2+ + Br- + H+ → Mg + BrO3- + H2O

1     2      2    → 1    1       1

Water appears in the balanced equation as a product with a coefficient of 1.

In this reaction, magnesium (Mg) is reduced. Reduction is the gain of electrons by an atom or ion. In the given reaction, magnesium (Mg) gains electrons to form Mg, which has a lower oxidation state than Mg2+. This reduction occurs because hydrogen ions (H+) are present in the reaction mixture, which can donate electrons to reduce Mg2+ to Mg. The reduction of Mg2+ to Mg is an oxidation-reduction (redox) reaction, where magnesium is the reducing agent as it donates electrons, and hydrogen ions are the oxidizing agent as they accept electrons. The reduction of magnesium is an important process in various industrial applications, such as the production of titanium and other metals.

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An atom is an indivisible particle of the matter and it is the fundamental building blocks of the matter. Some examples of atoms are sodium atom, fluorine atom, etc. It is the smallest unit of matter.

The elements are defined as the substance which is made up of same kind of atoms and that cannot be broken down into simpler form by any physical or chemical methods. Carbon is an element.

Carbon - C = 1 C atom

Oxygen molecule - O₂ = 2 'O' atoms

Methane - CH₄ = 1 'C' and 4 'H' atoms

Iron - Fe = 1 'Fe' atom

Glucose - C₆H₁₂O₆ = 6 'C', 12 'H' and 6 'O' atoms

Hydrogen chloride - HCl

Sulfur dioxide - SO₂ = 1 'S' and 2 'O' atoms

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The option which correctly compares beta decay and gamma decay is Beta-decay releases a particle, while gamma decay only reduces the energy level. Beta-decay is a form of nuclear fission, but gamma decay is not.

Beta decay is a form of radioactivity in which an electron is released. The electron could be positively charged(positron) or negatively charged.

Also, beta decay also occurs when there is nuclear fission of a substance in which a larger atom breaksdown into a smaller atom and releases energy.

Gamma decay is a form of radioactivity in which photons are released without the release of a particle from the atom.

Since a photon is released, only the energy level of the atom reduces and is thus not a form of nuclear fission

So, the option which correctly compares beta decay and gamma decay is Beta-decay releases a particle, while gamma decay only reduces the energy level. Beta-decay is a form of nuclear fission, but gamma decay is not.

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Answer:

Beta decay releases a particle, while gamma decay only reduces the energy level. Beta decay is a form of nuclear fission, but gamma decay is not.

Explanation:

The empirical formula of the compound is CH₂

Mass of C = (12 / 44) × 3.14

Mass of C = 0.86 g

Mass of H = (2 / 18) × 1.29

Mass of H = 0.14 g

Divide by their molar mass

C = 0.86 / 12 = 0.07

H = 0.14 / 1 = 0.14

Divide by the smallest

C = 0.07 / 0.07 = 1

H = 0.14 / 0.07 = 2

Thus, the empirical formula of the compound is CH₂

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Explanation:

GaBr3 is called gallium tribromide. It is composed of one gallium atom and three bromide atoms. Within a molecule of gallium tribormide, there are three bonding electron pairs and zero lone pairs of electrons. Such a configuration results in the trigonal planar molecular shape.

Answer:

GaBr3 is called gallium tribromide.

Explanation:

It is composed of one gallium atom and three bromide atoms. Within a molecule of gallium tribormide, there are three bonding electron pairs and zero lone pairs of electrons. Such a configuration results in the trigonal planar molecular shape.

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bam makes a second solution, adding 6.41 g of co(ch3coo)2 to 36.45 ml of h2o. 0.0137moles  concentration of this solution in mole fraction.

The following formula can be used to determine the concentration of the solution in moles:

1. Determine the moles of every dissolved solute in the solution:

Co(ch3coo)2 moles equal 6.41 g / (242.18 g/mol) = 0.0265 mol H2O moles equal 36.45 ml x (1 L/1000 ml) x (55.55 mol/L) = 2.0 mol

2. Total the amount of moles present in the mixture:

total moles = 0.00265 + 0.00265 = 2.0265

3. Dividing the total number of moles in the solution by the amount of each solute

Co(ch3coo) has a 0.0137 mole fraction.

Physical properties, on the other hand, are characteristics that do not alter the chemical makeup of a substance.

Boiling point, melting point, density, etc. are only a few examples of physical qualities.

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Answer:

Adding on to the answer said before, microscopes are pretty much one of the most significant tools used in Biology. It helped discover organelles, and smaller stuff like DNA, and prominently allowed Scientists to discover Bacteria and Archaea, the prokaryotic cells that contribute a big role in the functioning of soil, which is essential for our ecosystem.

Answer:

Platinum

Explanation:

Answer:

A

Explanation:

The force of gravity between two objects is dependent on the masses of the two objects and the distance between them.

According to Newton's law of universal gravitation, the gravitational force of attraction (F) between two objects with mass m1 and m2 separated by a distance (r) varies directly as the product of the masses and inversely as the square of the distance separating them.

Mathematically,

\(F=G{\frac{m_1m_2}{r^2}}\) where G is the gravitational constant.

The correct option is, therefore, A.

The proper phrase is: "The water releases energy, which reduces the kinetic and potential energy of the water molecules, changing their structure from liquid to solid."

What is Potential Energy?

Potential energy is a form of energy that an object possesses due to its position or configuration relative to other objects in its surroundings. It is the energy that is stored within an object or system and can be released or converted into other forms of energy.

Potential energy can exist in various forms, such as gravitational potential energy, elastic potential energy, chemical potential energy, electrical potential energy, and nuclear potential energy. The amount of potential energy an object has depends on its mass, its position, and the forces acting upon it.

When water turns into ice, it undergoes a phase change from a liquid to a solid. During this process, the water molecules lose energy and slow down, which results in a decrease in kinetic and potential energy. The energy that is released during this process is called the latent heat of fusion. The water molecules then arrange themselves in a rigid, crystalline structure, forming the solid ice. Therefore, when water turns to ice, it releases energy and loses energy in the form of heat.

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Answer: The molarity of the K2CO3 solution is 0.625 M.

Explanation: To find the molarity of a solution, you need to know the moles of solute and the volume of the solution in liters. Here's how to solve the problem:

Calculate the moles of K2CO3 using its given mass and molar mass:

moles = mass / molar mass = 93.1 g / 136.21 g/mol = 0.682 mol

Calculate the volume of the solution in liters:

volume = 1.09 L

Calculate the molarity of the solution using the moles and volume:

molarity = moles / volume = 0.682 mol / 1.09 L = 0.625 M

No, noninvasive can not be used to study the responses of single neuron.

It is not possible to study the responses of a single neuron non-invasively using current technology. The information related to the activity of a single neuron can be studied using invasive methods such as microelectrode recordings from a single neuron. It is crucial to be cautious while performing such methods as it might damage the brain tissue.

Some non-invasive techniques like fMRI, EEG, and MEG can only record neural activity from many neurons together. EEG, fMRI, and MEG provide information on the activity of groups of neurons, but they cannot provide information on single neuron activity. Hence, invasive techniques are preferred as they can provide detailed information about the activity of individual neurons.

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Answer:

a

Explanation:

its a

Answer:

C.

Explanation:

Physicists main field of study is physics. This includes everything from force, matter, energy, and even time among other things. Therefore, from the questions provided the one that would most likely be studied by a physicist would be How can the forces on a space probe be controlled so it will land on Mars? This is because this question deals with forces acting on an object, regardless of what the object is Force is a huge part of physics and therefore studied by Physicists.

If two elements have the same number of protons but different number of neutrons, can they be atoms of the same elements are called isotopes.

Atoms of the identical detail that incorporate the identical variety of protons, however special numbers of neutrons, are referred to as isotopes. Isotopes of any given detail all incorporate the identical variety of protons, in order that they have the identical atomic size (for example, the atomic variety of helium is usually 2). An isotope is one in every of or greater kinds of the identical chemical detail. Different isotopes of an detail have the identical size of protons withinside the nucleus, giving them the identical atomic size however a special variety of neutrons giving every elemental isotope a special atomic weight.

Thus, that species are known as isotopes.

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The balanced equation for the precipitation reaction  is
C2H6 + 7O2 + 4H2O → 2CO2 + 7H2O .

A precipitation reaction is a chemical reaction occurring in an aqueous solution where two ionic bonds combine, resulting in the formation of an insoluble salt which is called the precipitate. A precipitate is a solid that forms out of a solution.

The balanced equation for the precipitation reaction of C2H6 and which product is the precipitate is as follows:

C2H6 + 7O2 + 4H2O → 2CO2 + 7H2O

In this reaction, the product that is the precipitate is not specified as there is no indication of any other reactant involved in the reaction that can form a precipitate.

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In this question, we are given with the volume at initial point i.e. 275ml that undergoes the change in pressure from 1.45atm to 2.10 atm.

We are asked to determine the final volume after the change.

For that we'd consider the Boyle's law that states that, for a gas in an iso-thermic system Pressure is inversely proportional to the Volume.

which means with the increase in Pressure, Volume of gas will reduce.

At constant Temperature, product of Pressure and Volume will be constant.

PV =  constant.

for same system at different pressure volume condition, we can say that-

PV=pv

where,

P=Initial pressure = 1.45 atm

p= Final pressure = 2.10 atm

V= Initial Volume = 275 ml

v=  Final volume, to be determined in this question

PV = pv

(1.45)(275) = (2.10)v

Final Volume= (1.45)(275)/(2.10)

Final Volume = 189.88 ml

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Answer:

30

Explanation:

Answer:

The first one, The third one.

700-25, 600+75!

Explanation:

Answer:

96 m/s.

Explanation:

Distance equals speed x time,

12 x 8, so the distance is 96 m/s.

For SiS₂, silicon disulfide, the electron dot formula could be seen in the attached picture. The total nonbonding electron pairs in a SiS₂ molecule is: 4 pairs.

The electron dot formula, also known as the Lewis structure, is a representation of the total valence electrons of atoms within a molecule. By writing an electron dot formula, we can visualize the existence of valence electrons and whether they are within bonds or just stand as lone pairs.

The nonbonding electron or the lone pairs are electrons within an atom that are not forming a bond with the other atoms in a molecule. In the SiS₂ molecules, the 4 nonbonding pairs exist both in S atoms.

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A manometer's measured pressure is that which is more than atmospheric pressure, which at sea level is 14.7 psi, 101.3 kPa, or 76 cmHg .

About 78% of the gases in the Earth's atmosphere are nitrogen, 21% are oxygen, 0.9 % are argon, and 0.1 % are other gases. The remaining 0.1 percent of gases includes trace amounts of neon, water vapor, methane, carbon dioxide, and methane.

101,325 pascals, or newtons of force per square meter, is the equivalent of one standard atmosphere, sometimes referred to as one atmosphere (approximately 14.7 pounds per square inch). also see millibar Related Articles: environment.

calculation:

atmospheric pressure = 760mm of Hg

Manometer at sea level = 101m3kPa

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The predicted rate law for this reaction is: Rate = k[O3]

This corresponds to option 2 from the given choices.

Based on the proposed mechanism for the reaction O3(g) ⟶ O2(g) + O(g), we can predict the rate law of the equation. The first step of the reaction is the slow step, where O3 reacts to form O2 and O. The second step is the fast step, where O3 and O react to form 2O2.

To determine the rate law, we need to consider the rate-determining step, which is the slow step. The rate law for the slow step is determined by the reactants that are involved in this step. In this case, the slow step involves O3, so the rate law should include [O3].

The second step involves O and O3, but since O is not included in the slow step, it is considered to be a reactive intermediate and should not be included in the rate law. Therefore, the rate law for this reaction is:

Rate = k[O3]

This means that the rate of the reaction is directly proportional to the concentration of O3, with a rate constant of k. The order of the reaction with respect to O3 is 1, indicating that a doubling of the concentration of O3 will result in a doubling of the reaction rate.

Therefore, option 2 is correct.

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Answer:

8 grams

Explanation:

you don't even need to show work for this

\(\huge{\mathbb{\tt {QUESTION:}}}\)

What makes a radioactive decay chain end?

OA. The final element has the longest half-life.

OB. All mass has been converted to energy.

OC. The radiation is absorbed by something.

OD. The final product is not radioactive.

\(\huge{\mathbb{\tt {ANSWER:}}}\)

D. The final product is not radioactive

\(\huge{\mathbb{\tt {EXPLANATION:}}}\)

A radioactive decay chain will end when the last particle formed is stable. The initial radioactive isotope is called the parent isotope.

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A decay chain will end only when the final product is not radioactive.

The term radioactivity has to do with the sponteanous disintegration of an atom with the emission of radiation. Usually, there are radioactive decay series for different isotopes.

A radioactive decay series will continue untill a stable isotope is formed hence, a decay chain will end only when the final product is not radioactive.

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Answer:

1.03 grams / mL

Explanation:

Mass of beaker and sample liquid = 84.64

Mass of beaker                                = 32.344

Mass of the sample (subtract)        =  52.296

Don't do any rounding until you are finished.

mass = 52.296 grams

volume = 50.6 mL

density = mass / volume

density = 52.296/50.6

density = 1.034 grams / mL

Rounding

The volume only has 3 dig digs

So the answer is 1.03 grams / mL

The correct equation for the decomposition reaction of Silver chloride :

2AgCl(s)⇒2Ag(s)+Cl₂(g)

Given

Silver chloride breaks down into Silver and Chlorine.

Required

The correct equation

Solution

Decomposition reaction : a single reactants breaks down into 2 or more products. The reaction is the reverse of synthesis reaction

General formula :

AB ⇒ A + B

So for decomposition of Silver chloride :

2AgCl(s)⇒2Ag(s)+Cl₂(g)

When 0.018 mol of tripalmitin is hydrolyzed, the theoretical yield of palmitic acid will be 0.054 moles.

The hydrolysis of tripalmitin with NaOH is saponification where a glycerol compound and fatty acids are released. Thus the fatty acids combined with the Na ion further react with the acid HCl forming a salt. Tripalmitin is a triglyceride obtained from 3 hydroxy groups of glycerol by palmitic acid (hexadecanoic). Thus, this hydrolysis yield carboxylate salt and alcohol called a saponification reaction.

Hydrolysis of 1 tripalmitin releases 3 fatty acids hence, for 0.018 moles, palmitic acid yielded is,

= 0.018 × 3

= 0.054 moles.

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From the standard curve, the absorbance of the 2.0 mg/mL solution is 0.171, which can be expressed as A = εbc, where ε is the molar absorptivity (liters per mole per centimeter) at 230 nm, b is the path length (cm), and c is the concentration of benzoic acid (moles per liter).

The molar absorptivity (ε) can be calculated as:ε = A/bc = 0.171/(1 × 2.0 × 10^-3) = 85.5 L mol^-1 cm^-1

Using Beer-Lambert's law, the concentration of benzoic acid in the sample can be calculated as:c = A/εb = 0.065/85.5 × 1 × 10^-2 = 7.60 × 10^-5 mol/L

The concentration of benzoic acid in the sample is 7.60 × 10^-5 mol/L. The mass of benzoic acid in the sample can be calculated as:

mass = concentration × volume × molar mass= 7.60 × 10^-5 × 100 × 10^-3 × 122.12= 0.93 mg

Concentration of caffeine:

From the standard curve, the absorbance of the 10.0 mg/mL solution is 0.980, which can be expressed as A = εbc, where ε is the molar absorptivity (liters per mole per centimeter) at 265 nm, b is the path length (cm), and c is the concentration of caffeine (moles per liter).

The molar absorptivity (ε) can be calculated as:ε = A/bc = 0.980/(1 × 10.0 × 10^-3) = 98 L mol^-1 cm^-1

Using Beer-Lambert's law, the concentration of caffeine in the sample can be calculated as:c = A/εb = 0.326/98 × 1 × 10^-2 = 3.33 × 10^-4 mol/LThe concentration of caffeine in the sample is 3.33 × 10^-4 mol/L.

The mass of caffeine in the sample can be calculated as:mass = concentration × volume × molar mass= 3.33 × 10^-4 × 100 × 10^-3 × 194.19= 6.47 mg

The mass of caffeine in the sample is 6.47 mg.

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