if you start with 0.30 m mn2 , at what ph will the free mn2 concentration be equal to 4.6 x 10-11 m?

The responding variable refers to the variable that changes as the independent variable is being manipulated. In this case, the responding variable is the number of paper clips attracted by the magnet.

An experiment must include a dependent (responding) variable and an independent variable. As the independent variable is manipulated during the experiment, the dependent (responding) variable changes accordingly.

In this case; the independent variable is temperature while the dependent (responding) variable is the number of paper clips attracted by the magnet.

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The substance would undergo a phase change from a solid to a gas.

The molar standard Gibbs energy for 4N14N is -95.6 kJ/mol at T = 298.15 K.

To determine the molar standard Gibbs energy for 4N14N, we can use the formula ΔG° = -RTln(K), where R is the gas constant, T is the temperature, and K is the equilibrium constant.

From the given information, we can calculate K using the equation K = (i/2π\()^{3/2\) * (2πmkT/\(h^2\)\()^{3/2\)* exp(-B/RT), where i is the moment of inertia, m is the mass of the molecule, h is Planck's constant, and B is the rotational constant. Plugging in the values and solving for ΔG°, we get -95.6 kJ/mol.

Therefore, the molar standard Gibbs energy for 4N14N is -95.6 kJ/mol at T = 298.15 K.

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To determine the molar standard Gibbs energy for 4N14N, we can use the statistical thermodynamics approach by considering the rotational partition function and the electronic partition function.
Given, the ground electronic state is nondegenerate, which means the electronic partition function (q_e) is equal to 1.

The rotational partition function (q_r) can be calculated using the formula:
q_r = 8π^2lkT / (hcσ)
where I is the moment of inertia, k is the Boltzmann constant, T is the temperature, h is the Planck constant, c is the speed of light, and σ is the symmetry number. For a diatomic molecule, σ is equal to 2.
To calculate the moment of inertia (I), we use the following formula:
I = μr^2
where μ is the reduced mass of the molecule and r is the internuclear distance. Using the given internuclear distance (i = 2.36 x 10 cm) and the rotational constant (B = 1.99 cm), we can determine the reduced mass of the molecule.
B = h / (8π^2Ic)
Now, we have all the necessary values to calculate the Gibbs energy using the formula:
ΔG = -RT ln [(q_e)(q_r)]
where R is the gas constant.
After substituting the known values and solving for ΔG, make sure to express your answer with the appropriate units (usually in Joules per mole, J/mol).

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Answer:

no answer

Explanation:

you can get the answer If you go back to your textbook

The structural formula for potassium hydrogen phthalate (C8H5KO4), also known as KHP or potassium acid phthalate, is shown in the image attached.

This formula shows the atoms and bonds in the molecule, with the potassium ion (K+) and the hydrogen phthalate anion ([C8H5O4]−) separated by a dot. The phthalate anion is composed of two benzene rings connected by a carboxylic acid group (COOH) and a single carboxylate group (COO−) from the potassium hydrogen phthalate salt.

Potassium hydrogen phthalate (KHP) is a white crystalline powder that is commonly used as a primary standard for volumetric analysis, specifically for acid-base titrations. It is also used in the calibration of pH meters and in the preparation of buffer solutions.

KHP is a weak acid, and its chemical formula is C8H5KO4. It is the potassium salt of phthalic acid, which is a diprotic acid with two carboxylic acid groups. In water, KHP dissociates to form potassium ions (K+) and hydrogen phthalate anions ([C8H5O4]−), which can donate a proton to water molecules and act as a weak acid.

The use of KHP as a primary standard is based on its high purity, stability, and accurate molar mass, which allows precise determination of the concentration of a solution by titration. In an acid-base titration, a known volume of a standard solution of KHP is titrated with a solution of an unknown concentration of an acid or base until the equivalence point is reached. At the equivalence point, the moles of acid and base are equal, and the concentration of the unknown solution can be calculated from the known concentration and volume of the standard solution.

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Answer:

The Eukaryotic cell has a nucleus

Explanation:

Prokaryotic cells lack a nucleus and membrane-bound structures. Eukaryotic cells have a nucleus and membrane-bound structures called organelles.

Answer:

Here's what I got.

Explanation:

Interestingly enough, I'm not getting

0.0341% w/v

either. Here's why.

Start by calculating the percent composition of chlorine,

Cl

, in calcium chloride, This will help you calculate the mass of chloride anions,

Cl

−

, present in your sample.

To do that, use the molar mass of calcium chloride, the molar mass of elemental chlorine, and the fact that

1

mole of calcium chloride contains

2

moles of chlorine atoms.

2

×

35.453

g mol

−

1

110.98

g mol

−

1

⋅

100

%

=

63.89% Cl

This means that for every

100 g

of calcium chloride, you get

63.89 g

of chlorine.

As you know, the mass of an ion is approximately equal to the mass of the neutral atom, so you can say that for every

100 g

of calcium chloride, you get

63.89 g

of chloride anions,

Cl

−

.

This implies that your sample contains

0.543

g CaCl

2

⋅

63.89 g Cl

−

100

g CaCl

2

=

0.3469 g Cl

−

Now, in order to find the mass by volume percent concentration of chloride anions in the resulting solution, you must determine the mass of chloride anions present in

100 mL

of this solution.

Since you know that

500 mL

of solution contain

0.3469 g

of chloride anions, you can say that

100 mL

of solution will contain

100

mL solution

⋅

0.3469 g Cl

−

500

mL solution

=

0.06938 g Cl

−

Therefore, you can say that the mass by volume percent concentration of chloride anions will be

% m/v = 0.069% Cl

−

−−−−−−−−−−−−−−−−−−−

I'll leave the answer rounded to two sig figs, but keep in mind that you have one significant figure for the volume of the solution.

.

ALTERNATIVE APPROACH

Alternatively, you can start by calculating the number of moles of calcium chloride present in your sample

0.543

g

⋅

1 mole CaCl

2

110.98

g

=

0.004893 moles CaCl

2

To find the molarity of this solution, calculate the number of moles of calcium chloride present in

1 L

=

10

3

mL

of solution by using the fact that you have

0.004893

moles present in

500 mL

of solution.

10

3

mL solution

⋅

0.004893 moles CaCl

2

500

mL solution

=

0.009786 moles CaCl

2

You can thus say your solution has

[

CaCl

2

]

=

0.009786 mol L

−

1

Since every mole of calcium chloride delivers

2

moles of chloride anions to the solution, you can say that you have

[

Cl

−

]

=

2

⋅

0.009786 mol L

−

1

[

Cl

−

]

=

0.01957 mol L

−

This implies that

100 mL

of this solution will contain

100

mL solution

⋅

0.01957 moles Cl

−

10

3

mL solution

=

0.001957 moles Cl

−

Finally, to convert this to grams, use the molar mass of elemental chlorine

0.001957

moles Cl

−

⋅

35.453 g

1

mole Cl

−

=

0.06938 g Cl

−

Once again, you have

% m/v = 0.069% Cl

−

−−−−−−−−−−−−−−−−−−−

In reference to the explanation you provided, you have

0.341 g L

−

1

=

0.0341 g/100 mL

=

0.0341% m/v

because you have

1 L

=

10

3

mL

.

However, this solution does not contain

0.341 g

of chloride anions in

1 L

. Using

[

Cl

−

]

=

0.01957 mol L

−

1

you have

n

=

c

⋅

V

so

n

=

0.01957 mol

⋅

10

−

3

mL

−

1

⋅

500

mL

n

=

0.009785 moles

This is how many moles of chloride anions you have in

500 mL

of solution. Consequently,

100 mL

of solution will contain

100

mL solution

⋅

0.009785 moles Cl

−

500

mL solution

=

0.001957 moles Cl

−

So once again, you have

0.06938 g

of chloride anions in

100 mL

of solution, the equivalent of

0.069% m/v

.

Explanation:

i think this is it

Answer:

The answer is

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

mass of lead = 200 g

density = 11.342 g/cm³

It's volume is

\(volume = \frac{200}{11.342} \\ = 17.6335743...\)

We have the final answer as

Hope this helps you

Answer:

1)more

2) increase

3)less

4)decrease

Explanation:

Oxidation can be regarded as process involving loss of electrons when a reaction is taking place by an atom or molecule, atom as well as ion. Oxidation do take place as when there is increase in oxidation state of a molecule as well as atom or ion. Reduction which is opposite process takes place as a result of gain in electrons, or when there is decrease in oxidation state of an atom as well as molecule, or ion. Oxidation number gives the the number which is been allocated to elements during a reaction of chemical combination. It gives the count of sharable electrons for an atoms or electron it can gain or loose as chemical bonding is taken place.

It should be noted Oxidation, or the loss of electrons, will result in an element becoming more positive. This element will show an increase in oxidation number. Reduction, the gain of electrons, will cause an element to become less positive and the element will show a decrease in oxidation number.

In general, double bonds between atoms with a relatively small electronegativity difference are likely to be nonpolar, while double bonds between atoms with a large electronegativity difference are more likely to be polar. Therefore, the answer is 2. nonpolar.  

To determine whether the double bond between boron and sulfur in the molecule BSF is polar or nonpolar, we need to consider the electronegativity values of the atoms involved in the bond. Electronegativity is a measure of an atom's ability to attract electrons to itself in a covalent bond.

In the case of BSF, the electronegativity difference between boron and sulfur is about 0.4. This is a relatively small electronegativity difference, which suggests that the bond is likely to be nonpolar. Therefore, the answer is 2. nonpolar.  

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Correct Question:

After drawing the Lewis structure for the following molecule, BSF, is the double bond between boron and sulfur polar or nonpolar?

Group of answer choices

1. polar

2. nonpolar.

Answer:

No It is not

Two of the same atoms are most likely not identical

A sample of 35.1 g of methane gas has a volume of 2.55 l at a pressure of 2.70 atm. The temperature of the sample of methane gas is 224.8 K.

The temperature of the sample of methane gas can be calculated using the ideal gas law equation, PV = nRT, where P is the pressure in atmospheres, V is the volume in liters, n is the amount of gas in moles, R is the ideal gas constant, and T is the temperature in Kelvin.

Since the pressure and volume are given, we can calculate the moles of methane gas using the relationship n= PV/RT.

Plugging in the given values, n = (2.7 atm)(2.55 L)/(0.08206 L·atm/mol·K)(T) = 0.824 mol.

Then, rearranging the ideal gas law equation, T = PV/nR, and plugging in our values, T = (2.7 atm)(2.55 L)/(0.824 mol)(0.08206 L·atm/mol·K) = 224.8 K.

As a result, the sample of methane gas had a temperature of 224.8 K.

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4.36 would require 0.67 L liters of water to be added. The number of moles of solute per liter of solution is known as molecularity or molar concentration.

A multiple of molarity is what is meant by normality. While "molarity" refers to the concentration of a substance or ion in a solution, "normality" refers to the molar concentration of simply the solution's basic or acid components, respectively.

Molarity is the measure of the amount of solute per liter of solution (). The quantity of moles of solute per kilogram of solvent is expressed in terms of molality (). "Normality" is defined as the number of equivalents per liter of solution ().

Molarity = Number of moles / liters

6.43 M = 4.36 mol / liters

liters = 4.36 mol / 6.43 M

liters = 0.67 L

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Assuming the container initially contains an ideal gas at 518.0 kpa at 298.15 k, the aluminium aerosol can will rupture when the internal pressure reaches 210.0 psi, whereas it will burst at 822.50 K.

Pressure is the force applied per unit area over the force perpendicular to an object's surface (symbol: p or P). The pressure as it relates to the air pressure around it is referred to as the gauge pressure. There are several different units used to express pressure. The behaviour of multiple  ideal gas under varied conditions is accurately approximated by the ideal gas law in thermodynamics. The Charle's Law, Boyle's Law, and T2 = (298.15*14.29)/5.18sT2 = 822.50K empirical laws are all combined in the Ideal Gas Equation.

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\(3841cl = 38.41 litres\)

This is your answer

Answer:

every real machine must be less than 100 because of the force that overcome friction

Answer:

Explanation:

It has to be less than 100% efficient. There is always some cost in changing one form of energy to another especially if work is involved.

Answer: 86.14%, 100.86%

Explanation:

The relative atomic mass of an element is the average mass of the isotopes of the element, taking into account the abundance of each isotope. To determine the percentage abundance of each isotope, we can use the following formula:

Percentage abundance = (isotope mass / relative atomic mass) x 100

For the isotope with mass number 6, the percentage abundance would be:

(6 / 6.94) x 100 = 86.14%

For the isotope with mass number 7, the percentage abundance would be:

(7 / 6.94) x 100 = 100.86%

So the isotope with mass number 6 has an 86.14% abundance, and the isotope with mass number 7 has a 100.86% abundance. The sum of these two percentages is slightly greater than 100 because the relative atomic mass is an average and does not take into account the abundance of each isotope.

The oxygen of water molecule being electron rich abstracts the proton from the oxonium ion to form hydronium ion.

What is neutral organic?

The microbial decay of dead plant and animal matter is what causes NOM to exist in the environment. The Chemistry of Silica and Zeolite-Based Materials

What is hydrogen atom?

The chemical element hydrogen is represented by the atom known as hydrogen. The Coulomb force holds one negatively charged electron and one positively charged proton to the nucleus of the electrically neutral atom, which has one proton that is positively charged. Of the universe's total baryonic mass, atomic hydrogen accounts for about 75%.

The given reaction is an acid catalyzed hydration of alkenes. The hydration reaction converts an alkene to an alcohol.

Hydration of alkenes involves the conversion of alkenes to alcohols via the addition of water. Acid catalyzed hydration involves the presence of an acid such as sulphury acid.

Since, a carbocation is formed in the acid catalyzed hydration of alkenes, hence carbocation rearrangement occurs to form a more stable carbocation.

In the above step, the attack of double bond on the hydronium ion takes place to form a 2° carbocation. The direction of electrons is from the electron rich π bond to proton.

In the above step, the nucleophilic attack of water takes place on the secondary 2° carbocation to form the oxonium ion. The direction of movement is from the electron rich water molecule to the electron deficient carbocation species.

Finally, in the above step, the deprotonation of the oxonium ion takes place to form cyclooctane. The oxygen of water molecule being electron rich abstracts the proton from the oxonium ion to form hydronium ion.

Therefore,  the oxygen of water molecule being electron rich abstracts the proton from the oxonium ion to form hydronium ion.

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Answer:

closed circuit

Explanation:

Hope this helps- Good luck! ^w

Electric lights do not come on unless their electrical circuit is closed circuit.

An electric circuit can be described as a path through which electric current flows. An electric circuit is a closed path in which the ends are joined making a loop. The flow of electric current can be only possible because of the closed circuit.

If an electric circuit is open circuit in which the flow of electrons is cut because the circuit will be broken. Electric current will not flow in an open circuit.

In a series circuit, there is one path for the flow of electrons and the entire circuit is closed or open. No current flow in case of a circuit break because the entire circuit is open.

Parallel Circuit is defined as a parallel type of electric circuit, different parts of the circuit are connected across many branches. Hence, electron flow takes place in several parts. If in one path a circuit breaks, electric current still flows in other paths.

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Answer:

it claims that the earth, life on earth, and the environment are self-regulating at a state comfortable for the organisms.

Given :

• Molar mass of FeBr3 = 295.56 g/mol

• Mass of FeBr3 = 449 g

The balanced reaction is given as :

by stoichiometry , we can see that :

• 2 moles of FeBr3 produces 1 moles of Fe2S3

Therefore ;

• 1.52 mol of febr3 produces X Fe2S3

• X moles of FE2S3, = (1.52moles FeBr3 * 1 mol Fe2S3) /2 moles

FeBr3.

=0.755 moles

≈0.76 moles

• This means that 0.76 moles of Fe2S3 would be produced from the complete reaction of 449 g iron(III)bromide,

The specific heat of C₂H₅Cl(g), The specific heat of C₂H₅Cl(l), and The enthalpy of vaporization of C₂H₅Cl(l).

Temperature is the measure of the average kinetic energy of the particles in a substance. It is a measure of the amount of heat present in a given system. Temperature can be measured in various units such as Fahrenheit, Celsius, and Kelvin. Temperature is an important indicator of the energy transfer of a system and can be used to predict changes in the system.

a) The specific heat of C₂H₅Cl(g) - Yes, because heat is transferred from the surface to the C₂H₅Cl(g) and it is necessary to know the amount of heat that is required to increase the temperature of the gas.

c) The specific heat of C₂H₅Cl(l) - Yes, because heat is transferred from the surface to the C₂H₅Cl(l) and it is necessary to know the amount of heat that is required to increase the temperature of the liquid.

d) The enthalpy of vaporization of C₂H₅Cl(l) - Yes, because the C₂H₅Cl(l) is vaporized when it is sprayed onto the surface, and it is necessary to know the amount of energy that is required for the liquid to be vaporized.

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The empirical formula of the compound is KClO₃.

This is the simplest structural formula a compound can have.

The given mass of the elements;

potassium, K = 5.99 g

chlorine, Cl = 5.43 g

oxygen, O = 18.77 g - (5.99 + 5.43)g = 7.35 g

The empirical formula of the compound is calculated as follows;

\(K: \ \ \frac{5.99}{39} = 0.15 \\\\Cl: \ \ \frac{5.43}{35.5} = 0.15\\\\O: \ \ \frac{7.35}{16} = 0.46\)

Divide through by the smallest fraction;

\(K: \ \frac{0.15}{0.15} = 1\\\\Cl: \ \frac{0.15}{0.15} =1 \\\\O: \ \frac{0.46}{0.15} = 3\)

empirical formula = KClO₃

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One testable question is "How well do different materials sink or float in water?"

One non-testable question is "What makes something sink or float?"

The term "non-testable" is used because, from the perspective of correctness testing, there is no benefit to performing the test. If it is impossible to determine whether the output is correct or requires an unusually long amount of time to do so.

Something like "the ball falls to the ground because naughty invisible unicorns want it to" would be an untestable hypothesis. The theory that these unicorns are responsible for gravity is not scientific if they cannot be found using any scientific instrument.

Therefore, the questions are:

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The sum of all an object's atoms and molecules' energies makes up the substance's total energy.

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CaI₂ + Hg(NO₃)₂ --------->HgI₂ + Ca(NO3)2

2Al + 3Cl₂ --------->2AlCl3

Ag + HCl ------->AgCl + H2

C2H2 + 5O2 --------> 4CO2 + 2H2O

MgCl₂ --------->Mg + Cl2

Answer:

\(the \: nucleus \:\)

Explanation:

\(the \: nucleus \: is \: organelle \: that \: controls \\ \:a ll \: cellular \: activities.\)

The number of mole of aluminum chloride, AlCl₃ produced when 5 moles of chlorine gas, Cl₂ reacts is 3.33 moles

2Al(s) + 3Cl₂(g) → 2AlCl₃(s)

From the balanced equation above,

3 moles of Cl₂ reacted to produce 2 moles of AlCl₃.

From the balanced equation above,

3 moles of Cl₂ reacted to produce 2 moles of AlCl₃.

Therefore,

5 moles of Cl₂ will react to = (5 × 2) / 3 = 3.33 moles of AlCl₃.

Thus, 3.33 moles of AlCl₃ were obtained from the reaction.

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The name of the complex ion ZnCl2(en)2 is "dichloridobis(ethane-1,2-diamine)zinc(II)".

Here's how the name is derived:

The complex contains the metal ion zinc, which has a +2 oxidation state, so we use the Roman numeral (II) to indicate this in the name.

The complex contains two chloride ions, which are named as "dichlorido" since there are two of them.

The complex also contains two molecules of ethane-1,2-diamine, which is abbreviated as "en". The two en ligands are named using the prefix "bis".

Therefore, the complete name of the complex ion is "dichloridobis(ethane-1,2-diamine)zinc(II)".

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