Alyssa repeated the titration of a 5.00 mL antimony trichloride solution with distilled water until a slightly cloudy appearance persisted after thoroughly mixing the solution. Based on her data, she calculated the following concentrations for SbClz and HCl. Calculate the equilibrium constant, K, for the hydrolysis of the antimony trichloride. Concentration of SbCl3 = 0.028 M Concentration of HCI = 2 M Note: Do not use scientific notation or units in your response. Sig figs will not be graded in this question, enter your response to four decimal places. Carmen may add or remove digits from your response, your submission will still be graded correctly if this happens.

In the reaction 0.867 moles of ammonia will be produced from 1.30 mol of hydrogen and excess nitrogen, because,

Hydrogen gas is oxidized by hydrogenase and electrons are carried to the anode. In the other, electrons come off the cathode and are combined with nitrogen, via nitrogenase, to create ammonia.

3H2(g) + N2(g) ⇄ 2NH3(g)

Assuming N2 is in excess, multiply the given moles H2 by the mole ratio between H2 and NH3 in the balanced equation so that moles H2 cancel, leaving moles NH3.

1.30 mol H2 × (2 mol NH3/3 mol H2) = 0.867 mol NH3.

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The oxidation number of chromium in the ionic compound ammonium dichromate, (NH₄)₂Cr₂O₇, is +6.

This is because the ammonium ion (NH₄⁺) has a +1 charge, and the oxygen ions (O²⁻) each have a -2 charge, so the two chromium ions (Cr) must each have a +6 charge in order to balance the overall charge of the compound, which is 0. So, the long answer to your question is that the oxidation number of chromium in ammonium dichromate is +6.

A positive or negative number assigned to an atom in a molecule or ion to indicate its degree of oxidation or reduction in a chemical reaction is known as n oxidation number. It is a formalism that is used to keep track of the transfer of electrons between atoms during the chemical reactions.

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Answer: mass is the amount of matter in one object or substance

Explanation:

Answer: H2SO4 + 2NaOH = Na2SO4 2H2O

Explanation: The ChemicalAid website is very helpful if you need to balance chemical equations.

The final temperature of the solution, given that 3.00 g of NH₄NO₃ is dissolved in 100.0 g of water at 24.0 °C, is 26.3 °C

First, we need to obtain the heat absorbed. Details below:

Q = m × ΔH

= 3 × 330

= 993 J

Finally, we shall obtain the final temperature of the solution. Details below:

Q = MC(T₂ - T₁)

990 = 103 × 4.18 × (T₂ - 24)

990 = 430.54 × (T₂ - 24)

Divide both sides by 430.54

T₂ - 24 = 990 / 430.54

T₂ - 24 = 2.3

Collect like terms

T₂ = 2.3 + 24

= 26.3 °C

Thus, the final temperature of the solution is 26.3 °C. None of the options are correct

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Answer:

about an hour but it might take a little longer it jist depends

Answer:

Because as water is used it returns to the ground where it's evaporated by the sun and comes back to us as rain

Answer:

After the rain falls to earth, it may stay here for a long time. Some water stays underground among the rocks for thousands of years. Eventually, however, the water will end up someplace where it can be evaporated, often in the ocean, and then the water cycle repeats itself.

:))

Gasohol is a blend of gasoline and ethanol. To determine the maximum work that can be obtained by burning 1.003 mol of C2H5OH at 25°C and 1 atm, the Gibbs free energy equation can be utilized. What is Gibbs free energy equation? Gibbs free energy equation is a thermodynamic equation that quantifies the maximum quantity of work that may be obtained during a chemical reaction. T

he equation is as follows: ΔG = ΔH - TΔSThe values of ΔH and ΔS are calculated from thermodynamic tables or by calculating the enthalpy and entropy of the products and reactants, and the temperature, T, is usually specified in Kelvin. The change in Gibbs free energy, ΔG, is the maximum amount of energy that can be obtained from the reaction in the form of useful work if the reaction takes place at constant pressure and temperature. The reaction will proceed spontaneously if ΔG is negative. And if ΔG is positive, the reaction will not take place spontaneously. The solution to this problem is shown below:

First, let's figure out how much heat is produced when one mole of C2H5OH is burnt.ΔHrxn = [2(moles of CO2)(-393.5 kJ/mol) + 3(moles of H2O)(-285.8 kJ/mol)] - [(moles of C2H5OH)(-277.7 kJ/mol)]ΔHrxn = [2(2.006 mol)(-393.5 kJ/mol) + 3(3.009 mol)(-285.8 kJ/mol)] - [1.003 mol(-277.7 kJ/mol)]ΔHrxn = -2043.5 kJ/mol. Now, we'll figure out the entropy change for the reaction.ΔSrxn = [2(moles of CO2)(213.8 J/mol-K) + 3(moles of H2O)(69.9 J/mol-K)] - [(moles of C2H5OH)(160.7 J/mol-K)]ΔSrxn = [2(2.006 mol)(213.8 J/mol-K) + 3(3.009 mol)(69.9 J/mol-K)] - [1.003 mol(160.7 J/mol-K)]ΔSrxn = -104.3 J/mol-KThe temperature in Kelvin is 25°C.273 + 25 = 298 KΔG = ΔH - TΔSΔG = -2043.5 kJ/mol - (298 K)(-104.3 J/mol-K)/1000ΔG = -2032.6 kJ/mol. Therefore, the maximum work that can be obtained by burning 1.003 mol of C2H5OH is 2032.6 kJ/mol, which is the value of ΔG.

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Energetic molecules such as NADH and ATP are often reactants of exergonic reactions.

Exergonic reactions are those that discharge energy and have a harmful Gibbs-free energy change. In these reactions, the reactants have more free energy than the products, so the excess energy is cast in the state of heat. An exergonic reaction is a chemical reaction where the shift in the free energy is negative.

Energetic molecules like NADH and ATP store energy in their chemical adhesives, which can be emitted in exergonic reactions to drive endergonic responses that need energy input. Therefore, they are usually employed as reactants in exergonic reactions.

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Answer: linear

tetrahedral

bent

trigonal bipyramidal

Explanation:

When there are two atoms around the central atom and no lone pair of electrons, the number of electron pairs will be 2  that means the hybridization will be sp and the electronic geometry of the molecule will be linear.

When there are four atoms around the central atom and no lone pair of electrons, the number of electron pairs will be 4  that means the hybridization will be \(sp^3\) and the electronic geometry of the molecule will be tetrahedral.

When there are two atoms around the central atom and two lone pair of electrons, the number of electron pairs will be 4  that means the hybridization will be \(sp^3\) and the electronic geometry of the molecule will be bent.

When there are five atoms around the central atom and no lone pair of electrons, the number of electron pairs will be 5 that means the hybridization will be \(sp^3d\) and the electronic geometry of the molecule will be trigonal bipyramidal.

15.10%  is the percent by mass of sugar in the original mixture.

given;

sugar mass= 10.40 g

nacl mass= 58.44 g

mass% of sugar= 10.40/10.40+58.44

mass% of sugar=10.40÷68.84×100

mass% of sugar=15.10%

Mass conservation is one of the fundamental laws of chemistry. Every time a reaction occurs, the mass of the products entering the reaction and the mass of the products leaving the reaction are the same. The quantity of matter in an object is expressed in terms of mass. Typically, mass is expressed in kilograms (kg) or grams (g) (kg). No matter where in the universe it is or how much gravitational force is exerted on it, mass is a measure of how much matter there is. In contrast to an object's weight, which is a force that depends on gravity, an object's mass is constant regardless of the situation. Your mass on the moon and the earth are the same. You weigh roughly one-sixth as much on the moon as you do on the earth.

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\(\boxed{\sf Molarity=\dfrac{Moles}{Vol\:in\:L}}\)

Moles of CaCO_3:-

Come to formula stated first

\(\\ \tt\Rrightarrow Volume=\dfrac{Moles}{Molarity}\)

\(\\ \tt\Rrightarrow volume=\dfrac{0.008}{0.4}\)

\(\\ \tt\Rrightarrow volume=0.02\ell=20m\ell\)

To minimize costs, Whole Food should choose capital and labor levels that depend on the output, Q.

In order to determine the capital and labor levels required to produce an output of Q and minimize costs, the cost function must be minimized. The cost function C(L,K) can be derived from the production function Q=L2K12, where the cost of labor is $5/unit and capital is $10/unit: C(L,K) = 5L + 10K. The cost function must be minimized with respect to both labor and capital.

Taking the partial derivatives of the cost function with respect to both L and K, setting them equal to 0 will give the optimal levels of capital and labor. Solving for labor and capital, we obtain: L = (Q/144)^(1/4) and K = (Q/16)^(1/6). These are the levels of labor and capital that Whole Food should choose to produce an output of Q and minimize costs.

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The acidic or alkaline character of a solution is obtained from the value of pH. Here baking soda is a base which neutralizes the acid.

The pH of a solution is defined as the negative logarithm of hydronium ion concentration in moles per litre. It can be expressed as:

pH = -log [H₃O⁺]

For acidic solution, the pH will be less than 7 and for basic solution the pH will be greater than 7.

Here the sample of water which has the pH of 5.6 is acidic and it is neutralized by the base baking soda.

Thus we can say that baking soda is a base.

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There are two kinds of motion that earth possess, one is rotation and other is revolution. Therefore,  earth does not stay in one place throughout the year. The earth revolves and spins around the sun. The Earth is situated between Venus and Mars.

The motion of the earth around its axis is known as rotation. Revolution refers to the motion of the earth about the sun in a fixed route or orbit. The earth's axis, which is an invisible line, forms a 6612° angle with its planet's orbit.

No, the earth does not remain stationary throughout the year. The Earth revolves around the sun. The earth revolves and spins around the sun. The Earth is situated between Venus and Mars, therefore it is neither too hot nor too cold.

Therefore,  earth does not stay in one place throughout the year. The earth revolves and spins around the sun. The Earth is situated between Venus and Mars.

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After 10 weeks (or 70 days), approximately 66.67 mg of Polonium-210 will remain.

To answer this question, we first need to convert 10 weeks into days. There are 7 days in a week, so 10 weeks is 70 days.Next, we can use the formula for exponential decay: N(t) = N0 * e^(-kt), where N(t) is the amount remaining at time t, N0 is the initial amount, k is the rate of decay constant, and e is the mathematical constant approximately equal to 2.718.

We know that the half-life of Polonium-210 is 140 days, which means that k = ln(1/2) / 140 = -0.00496. Plugging in the values we have, we get:N(70) = 100 * e^(-0.00496 * 70)N(70) = 66.67 mgTherefore, after 10 weeks (or 70 days), approximately 66.67 mg of Polonium-210 will remain.

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Answer:

I think it is b

Explanation:

Answer:

Magnets are used to make a tight seal on the doors to refrigerators and freezers. They power speakers in stereos, earphones, and televisions. Magnets are used to store data in computers, and are important in scanning machines called MRIs (magnetic resonance imagers), which doctors use to look inside people's bodies.

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Answer:

12.66g

Explanation:

42.2% of 30.0g

=42.2/100 * 30.0

=0.422*30.0

12.66g

The concentration of the koh solution content loaded when 15.00 ml of 0.500 m h2so4 is titrated with 17.70 ml of potassium hydroxide is 0.848 M (Approx.)

To determine the concentration of the KOH solution when 15.00 mL of 0.500 M H2SO4 is titrated with 17.70 mL of potassium hydroxide, follow these steps:

1. Write the balanced chemical equation: H2SO4 + 2KOH -> K2SO4 + 2H2O

2. Calculate the moles of H2SO4: moles = Molarity × Volume (in liters)
moles_H2SO4 = 0.500 M × 15.00 mL × (1 L / 1000 mL) = 0.0075 moles

3. Determine the moles of KOH: From the balanced equation, 1 mole of H2SO4 reacts with 2 moles of KOH, so
moles_KOH = 2 × moles_H2SO4 = 2 × 0.0075 moles = 0.015 moles

4. Calculate the concentration of KOH: Molarity = moles / Volume (in liters)
M_KOH = 0.015 moles / (17.70 mL × (1 L / 1000 mL)) ≈ 0.848 M

So, by calculating, the concentration of the solution results in approximately 0.848 M.

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Answer:

Acid: HSO4-

Base: NH3

Conjugate Acid: NH4+

Conjugate Base: SO4-2

Explanation:

HSO4- gives a H+ to NH3 making NH4+ the conjugate acid.

Same can be said to the base.

Answer:

umm whats the question??

Explanation:

Answer:

a)Mg(s) + 2HCl(aq) -------> MgCl2(aq) + H2(g)

b) 0.125 moles of hydrogen gas is reduced in the reaction.

C) 3.18 L

d)2.25 g of water

Explanation:

a) the equation of this reaction is;

Mg(s) + 2HCl(aq) -------> MgCl2(aq) + H2(g)

b)

Number of moles= concentration × volume= 1.0 × 250/1000 = 0.25moles of HCl

From the equation;

2 moles of HCl yields 1 mole of hydrogen gas

Hence 0.25 moles of HCl yields 0.25 × 1/2 = 0.125 moles of hydrogen gas

Thus 0.125 moles of hydrogen gas is reduced in the reaction.

c)

P= 760 mmHg (standard pressure)

V= ????

T= 298 K

n= 0.125 moles

R= 0.082 atm dm-3K-1mol-1

Since the gas is collected over water, SVP of hydrogen at 25°c is 28mmHg

Therefore; P=760-28= 732mmHg

But

1 atm =760 mmHg

Therefore 732 mmHg= 732/760= 0.96 atm

PV=nRT

V= nRT/P

V= 0.125 × 0.082 × 298/0.96

V= 3.18 L

Note 1dm-3=1L

d)

2H2(g) + O2(g) ----> 2H2O(g)

From the equation;

2 moles of hydrogen yields 2 moles of water

0.125 moles of hydrogen yields 0.125 moles of water

Mass of water = 0.125 moles × 18gmol-1 = 2.25 g of water

Answer:

If the temperature of the system is increased, then the equilibrium position would shift to the right side. According to Le Chatelier's principle, when a stress is applied to a system in equilibrium, the system will adjust itself to counteract the stress. In this case, increasing the temperature would be an external stress on the system, and the reaction would shift to consume more of the reactants, namely CH4 and H2S, to create more of the products, CS2 and H2, thus shifting the equilibrium position towards the products.

Explanation:

Answer:

the answer is a

Explanation:

Voltage can be thought of as the pressure pushing charges along a conductor, while the electrical resistance of a conductor is a measure of how difficult it is to push the charges along.

The decrease in the total number of moles of gas present is 10 moles.

The decrease in volume of the gas is 340 dm³.

The balanced chemical equation for the reaction between hydrogen and oxygen to form steam is:

2H₂(g) + O₂(g) → 2H₂O(g)

According to the stoichiometry of the reaction, 2 moles of hydrogen react with 1 mole of oxygen to form 2 moles of water vapor.

Based on the given data, the limiting reactant is oxygen when the mixture contains 10 mol of oxygen and 20 mol of hydrogen since 10 mol of oxygen reacts with 20 mol of hydrogen to form 20 mol of water vapor.

The initial total number of moles of gas present = 30 mol (20 mol of hydrogen + 10 mol of oxygen).

After the reaction, the total number of moles of gas present is 20 mol. Therefore, the decrease in the total number of moles of gas present = 30 - 20

The decrease in the total number of moles of gas present = 10 mol.

At 150 °C, 1 mole of gas occupies 34 dm³.

30 mol of gas initially occupies a volume of 30 × 34 = 1020 dm³.

After the reaction, 20 mol of water vapor occupies a volume of 20 × 34 = 680 dm³.

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The preparation of bases involves several methods that are used to create substances with basic or alkaline properties are Reaction of metal with water, Reaction of metal oxide with water, Neutralization reaction, Ammonia gas dissolving in water and Partial neutralization of a strong base with a weak acid.

Reaction of metal with water: Certain metals, such as sodium or potassium, react with water to form hydroxides. For example, sodium reacts with water to produce sodium hydroxide (NaOH).

Reaction of metal oxide with water: Metal oxides, such as calcium oxide (CaO) or magnesium oxide (MgO), can be added to water to form metal hydroxides. This process is known as hydration. For instance, when calcium oxide reacts with water, it forms calcium hydroxide (Ca(OH)2).

Neutralization reaction: Bases can be prepared by neutralizing an acid with an appropriate alkaline substance. This involves combining an acid with a base to form water and a salt. For example, mixing hydrochloric acid (HCl) with sodium hydroxide (NaOH) results in the formation of water and sodium chloride (NaCl).

Ammonia gas dissolving in water: Ammonia gas (NH3) can dissolve in water to form ammonium hydroxide (NH4OH), which is a weak base.

Partial neutralization of a strong base with a weak acid: Mixing a strong base, such as sodium hydroxide (NaOH), with a weak acid, like acetic acid (CH3COOH), results in the formation of a base with a lesser degree of alkalinity.

These methods are utilized in laboratories, industries, and various applications where bases are required, such as in the production of cleaning agents, pharmaceuticals, and chemical reactions. Each method has its own advantages and specific applications depending on the desired base and its properties.

The question was incomplete. find the full content below:

What are the various methods involved in the preparation of bases?

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Answer:

True

Explanation:

Temperature is a direct measure of thermal energy, which means that the hotter an object is, the more thermal energy it possesses. The amount of thermal energy transferred between two systems is measured as heat. It is simple to convert mechanical energy to thermal energy, for example, through friction.

Answer:

False.

Explanation:

I did this lesson and I clicked true and got it wrong.