Blank + 3Fe, reaction arrow, Fe3O4+4H2
How to complete this equation so that it is a Single displacement reaction

Dissolving sugar in water results in an increase in the entropy.

Hence, Option (D) is correct answer.

Measurement of randomness of a system is called entropy. It is an extensive property. It is a state function. Unit of entropy is JK⁻¹ mol⁻¹.

Now lets check all options one by one

Option (A): Freezing water

Freezing water decreases the entropy because here second law of thermodynamics does not violate.

So it is incorrect option

Option (B): Cooling water

Cooling water does not increases entropy because entropy increases when solid melts to give liquid.

So it is incorrect option

Option (C): Condensing water vapour

In Condensing water vapour the temperature of liquid phase decreases and thus kinetic energy decreases. The randomness will decrease and hence entropy will also decrease.

So it is incorrect option.

Option (D): Dissolving sugar in solute

In dissolving sugar in solute the solid dissociates to ions and  the randomness will increase and hence entropy will also increase.

So it is correct option

Thus from the above conclusion we can say that Dissolving sugar in water results in an increase in the entropy.

Hence, Option (D) is correct answer.

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If 5.0 grams of KCl is dissolved in 500 ml of water, the concentration of the resulting solution will be 0.134M.

The concentration of a solution can be calculated by using the following formula;

Molarity = no of moles ÷ volume

According to this question, 5.0 grams of KCl is dissolved in 500 ml of water. The concentration is calculated as follows:

no of moles of KCl = 5g ÷ 74.5g/mol = 0.067mol

Molarity = 0.067mol ÷ 0.5L = 0.134M

Therefore, if 5.0 grams of KCl is dissolved in 500 ml of water, the concentration of the resulting solution will be 0.134M.

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Vapor pressure of a liquid increases with increasing temperature because increasing the temperature results in increasing kinetic energy and increase in molecular transition and motion.

What is Vapor Pressure?

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A plant cell has a solute potential of -2.0 bars and pressure potential of 0.0. Its water potential is -2 bar. The cell will gain water or swell.

Water Potential is the potential energy of water in a system per unit volume relative to pure water , when both pressure and temperature are kept same. Water potential is never positive. It is expressed in kPa (Kilopascals). The symbol of water potential is ψ.

To find the water potential use this formula

[tex]\Psi = \Psi_{s} + \Psi_{p}[/tex]

where,

ψ = Water Potential

[tex]\Psi_{s}[/tex] = Solute Potential

[tex]\Psi_{p}[/tex] = Pressure potential

Now put the value in above expression we get

[tex]\Psi = \Psi_{s} + \Psi_{p}[/tex]

   = -2.0 + 0.0

   = - 2 bar

Thus from the above conclusion we can say that A plant cell has a solute potential of -2.0 bars and pressure potential of 0.0. Its water potential is -2 bar. The cell will gain water or swell.

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A wavy pattern of dark and light bands on the bottom of a pond is caused by refraction of light waves through a rough surface; option D.

Destructive interference occur when two waves come in contact with each other and cancel each other out.

Reflection and refraction of light waves can result in destructive interference. An example of destructive interference due to refraction of light is a wavy pattern of dark and light bands on the bottom of a pond.

In conclusion, destructive interference occurs when waves cancel each other out.

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The answer to the question is D.

Answer:

6.4 g BaSO₄

Explanation:

You have been given the molarity and the volume of the solution. To find the mass of the solution, you need to (1) find the moles BaSO₄ (via the molarity ratio) and then (2) convert moles BaSO₄ to grams BaSO₄ (via the molar mass). It is important to arrange the conversions in a way that allows for the cancellation of units (the desired unit should be in the numerator). The final answer should have 2 sig figs to reflect the sig figs of the given values.

Molarity (mol/L) = moles / volume (L)

(Step 1)

55 mL / 1,000 = 0.055 L

Molarity = moles / volume                             <----- Molarity ratio

0.5 (mol/L) = moles / 0.055 L                        <----- Insert values

0.0275 = moles                                             <----- Multiply both sides by 0.055

(Step 2)

Molar Mass (BaSO₄): 137.33 g/mol + 32.065 g/mol + 4(15.998 g/mol)

Molar Mass (BaSO₄): 233.387 g/mol

0.0275 moles BaSO₄          233.387 g
---------------------------------  x  -------------------  =  6.4 g BaSO₄
                                                1 mole

One of the product chemicals is aluminum chloride, which is an eye and skin irritant that can cause chemical burns. Wear safety glasses, Avoid contact with water or moisture and Avoid dust formation will prevent you from coming into contact with this hazard.

Aluminum chloride is also called Aluminum trichloride. The formula of Aluminum chloride is AlCl₃. Aluminum chloride is a poor conductor of electricity in molten state. It is a powerful Lewis acid. It has very low melting point and boiling point.  

To prevent from this hazard follows these rules:

Thus from the above conclusion we can say that One of the product chemicals is aluminum chloride, which is an eye and skin irritant that can cause chemical burns. Wear safety glasses, Avoid contact with water or moisture and Avoid dust formation will prevent you from coming into contact with this hazard.

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The value of the equilibrium constant K is a measure of how far the reaction proceeds toward the products at a given temperature. A small value of K indicates that the reaction favors the reactants, whereas a large value of K indicates that the products will be present in a higher proportion.

The equilibrium constant of a chemical reaction usually denoted by the symbol K that express the relationship between the amount of reactants and products when a chemical reaction reaches equilibrium.

It is expressed as:

[tex]K_{c} = \frac{[C]^{c} \times [D]^{d} \times ...}{[A]^{a} \times [B]^{b} \times ...}[/tex]

where,

K = Equilibrium constant

A, B = Products

C, D = Reactants

[A] = equilibrium concentration of A in moles

a = number of moles of A

Thus from the above conclusion we can say that The value of the equilibrium constant K is a measure of how far the reaction proceeds toward the products at a given temperature. A small value of K indicates that the reaction favors the reactants, whereas a large value of K indicates that the products will be present in a higher proportion.

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V₂O₅ (s) + 2H₂ (g) → V₂O₃ (s) + 2H₂O(l) is the balanced chemical equation for the reaction of solid vanadium(V) oxide with hydrogen gas to form solid vanadium(III) oxide and liquid water.

The balanced chemical equation is the equation in which the number of atoms on the reactant side is equal to the number of atoms on the product side in an equation.

The word based equation is

Vanadium(V) oxide + Hydrogen gas → Vanadium (III) oxide + Water

Now write the chemical equation

V₂O₅ (s) + 2H₂ (g) → V₂O₃ (s) + 2H₂O(l)

Reactant side                Product side

V = 2                                V = 2

O = 5                                O = 5

H = 4                                 H = 4

We can see that the number of atoms on reactant side is equal to the number of atoms on product side. So the given equation is balanced.

Thus from the above conclusion we can say that V₂O₅ (s) + 2H₂ (g) → V₂O₃ (s) + 2H₂O(l) is the balanced chemical equation for the reaction of solid vanadium(V) oxide with hydrogen gas to form solid vanadium(III) oxide and liquid water.

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Since there is one mole of Ca^2+ in calcium acetate, its concentration is 0.80 mol/L.

The term concentration has to do with the amount of substance in solution. The concentration can be measured in several units. Generally, concentration is expressed in molarity, molality, mass concentration units or percentage.

Now we are asked to find the amount concentration of calcium ions and acetate ions in a 0.80 mol/L solution of calcium acetate. The formula of calcium acetate is Ca(CH3COO)2.

Thus;

Ca(CH3COO)2(aq)  ----> Ca^2+(aq) + 2CH3COO^-(aq)

It then follows that since there is one mole of Ca^2+ in calcium acetate, its concentration is 0.80 mol/L.

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The molality of a solution is 0.304g

Calculation,

Given data,

Density of bromine = 3.105 g/ml  = mass / volume = mass / 2 ml

Mass of bromine = 3.105 g/ml ×  2 ml = 6.206 g

Density of acetic acid = 1.05 g/ml = mass / volume = mass / 125 ml

Mass of bromine = 1.05 g/ml ×  125 ml = 127.5 g

Molality = mass of solute in gram/molar mass of solute × 1000/mass of solvent in gram

Molality = 6.206 g/159.88 g/mol × 1000/127.5 g = 0.304 g

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Answer:

(1) Acid -------------------------------------> (G) When dissolved in water, its solution has a pH value less than 7. Acids are proton (H⁺ ion) donors.

(2) Alkali -----------------------------------> (E) The oxide, hydroxide, or carbonate of a metal that will react with an acid, forming a salt as one of the products (if a base dissolves in water it is called an alkali. Bases are proton (H⁺ ion) acceptors.

(3) Base ------------------------------------> (I) Its solution has a pH value of more than 7.

(4) Blast furnace ------------------------> (C) The huge reaction vessels used in industry to extract iron from its ore.

(5) Displacement reaction ----------> (R) A reaction in which a more reactive element takes the place of a less reactive element in one of its compounds or in solution.

(6) Mole -----------------------------------> (A) A very large number that is the amount of substance in the relative atomic or formula mass of a substance.

(7) Neutral -------------------------------> (J) A solution with a pH value of 7 which is neither acidic nor alkaline. Alternatively, something that carries no overall charge.

(8) Neutralization ----------------------> (F) The chemical reaction of an acid with a base in which a salt and water are formed. If the base is a carbonate of hydrogen carbonate, carbon dioxide is also produced in the reaction.

(9) Ore -------------------------------------> (P) Ore is rock which contains enough metal to make it economically worthwhile to extract the metal.

(10) Oxidation --------------------------> (B) A reaction where oxygen is added to a substance / or when electrons are lost from a substance.

(11) pH -------------------------------------> (O) A number which shows how strongly acidic or alkaline a solution is.

(12) Pipette ------------------------------> (N) A glass tube used to measure accurate volumes of liquids.

(13) Precipitate -------------------------> (K) An insoluble solid formed by a reaction taking place in solution.

(14) Reactant ---------------------------> (M) A substance we start with before a chemical reaction takes place.

(15) Reduction -------------------------> (S) A reaction in which oxygen is removed or electrons are gained.

(16) Salt ----------------------------------> (Q) A salt is a compound formed when some or all of the hydrogen in an acid is replaced by a metal.

(17) Strong acids ---------------------> (L) These acids completely ionize in solution and have a high concentration of H⁺ (aq) ions in solution.

(18) Universal indicator ------------> (H) A mixture of indicators that can change through a range of colors to show how strongly acidic or alkaline liquids and solutions are.

(19) Weak acids ---------------------->  (D) Acids that do not ionize completely in aqueous solutions.

In modern times the highest concentration of [tex]CO_{2}[/tex] measured in the earth's atmosphere is 400 ppm.

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According to the 2010 U.S. Census, 37 percent of women had college degrees compared to approximately 35 percent of men.

In 1970 and early 1980, women have surpassed men in number of bachelor's degree or master's degree in united state.

The women gets more degree to gain financial benefits. The gap in earning is greater in female graduate and non- graduate as compare to male graduate and non-graduate. To give education to girls saves lives and builds stronger families, communication and economic too.

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Answer:

3.25 x 10²⁴ molecules H₂O

Explanation:

To find the number of H₂O molecules, you need to (1) convert grams to moles (via molar mass) and then (2) convert moles to molecules (via Avogadro's Number). It is important to arrange the ratios/conversions in a way that allows for the cancellation of units. The final answer should have 3 sig figs to match the amount of sig figs in the given value.

Atomic Mass (H): 1.008 g/mol

Atomic Mass (O): 16.00 g/mol

Molar Mass (H₂O): 2(1.008 g/mol) + 16.00 g/mol

Molar Mass (H₂O): 18.016 g/mol

Avogadro's Number:

6.02 x 10²³ molecules = 1 mole

97.2 g H₂O            1 mole              6.02 x 10²³ molecules
------------------  x  -------------------  x  ------------------------------------  =
                              18.016 g                      1 mole

=  3.25 x 10²⁴ molecules H₂O

Answer:

The answer to your question is True

Explanation:

CH2O is a polar molecule. It has three polar bonds that are arranged asymmetrically, thus allowing their dipole moments to add up and give the molecule an overall dipole moment. CH2O has a central carbon atom that forms two single bonds with the two hydrogen atoms and a double bond with the oxygen atom.

I hope this helps and have a good day!

Answer:

D.) A symbol of magnesium Mg has two dots representing two free electrons.

Explanation:

Magnesium is located in the second group (column) of the periodic table. Elements located here have 2 valence electrons in their outermost shell. Thus, the electron dot diagram of magnesium has 2 dots symbolizing the 2 valence electrons.

The answer is 9.94 ml.

Given,

        The density of ethanol, C2H5OH = 0.789 g/mL

[tex]n (CO_{2} ) = \frac{m}{M} = \frac{15G}{44 g/mol} } = 0.341 mol;[/tex]

[tex]n ( C_{2} H_{2} OH) = \frac{n (CO_{2}) }{2} = \frac{0.341}{2} = 0.1705 mol;[/tex]

[tex]m (C_{2} H_{2} OH) = 0.1705 mol * 46 g/ mol[/tex] = 7.843 g

[tex]V (C_{2} H_{2} OH ) = \frac{7.843}{0.789} = 9.94 ml.[/tex]

Therefore, the answer is 9.94 ml

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The complete question is -

If the density of ethanol, C2H5OH, is 0.789 g/mL. How many milliliters of ethanol are needed to produce 15.0 g of CO2 according to the following chemical equation?

C2H5OH(l) + 3 O2(g) → 2 CO2(g) + 3 H2O(l)

The main properties of uranium-238 are as follows,

The Atomic mass and atomic weight of  uranium-238

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In a voltaic (galvanic) cell, oxidation occurs at the anode and is where anions in the salt bridge moves toward.

Galvanic Cell or Voltaic Cell is an electrochemical cell that converts the energy of spontaneous redox reactions into electrical energy. In galvanic cell oxidation occurs at the anode and reduction occurs at the cathode. The anode is positive and cathode is negative, anode attracts anions from solution in an electrolytic cell.

Thus from the above conclusion we can say that In a voltaic (galvanic) cell, oxidation occurs at the anode and is where anions in the salt bridge moves toward.

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molar mass of sucrose is 342 g/mol.

Concept:

It is the substance's molecular mass. M is the abbreviation for it, and g/mol is the standard unit for measuring molar mass.

Given:

Sucrose (C12H22O11)

Find:

Calculate the molar mass of the powdered fruit drink mix, made from sucrose (C12H22O11).

Solution:

The molar mass of carbon = 12 g/mol

The molar mass of hydrogen = 1 g/mol

The molar mass of oxygen = 16 g/mol

Thus, the molar mass of sucrose can be calculated as:

C12H22O11 12 C + 22 H + 11 O

= 12 12 g/mol + 22 * 1 g/mol + 11 * 16 g/mol

= 144 g/mol + 22 g/mol + 176 g/mol = 342 g/mol

Therefore, the molar mass of sucrose is 342 g/mol.

Hence, the molar mass of the powdered fruit drink mix, made from sucrose

Hence, the molar mass of the powdered fruit drink mix, made from sucrose(C12H22O11) is 342 g/mol.

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Molecules undergo London dispersion forces:

[tex]C_{4}H_{10}[/tex] is the molecule will undergo only London dispersion forces when interacting with other molecules of the same kind.

What are London dispersion forces?

Reason for incorrect options:

b: the compound is ionic because Na is a metal and the other part is covalent,

c: two compounds are possible: one is nonpolar and exhibits London dispersion force; the other is polar and exhibits dipole-dipole force; and

d: both compounds exhibit hydrogen bonds (H bonded to O, and H bonded to F).

NOTE: Your question is incomplete, but most probably your full question was, which molecule will undergo only London dispersion forces when interacting with other molecules of the same kind? Which molecule will undergo only London dispersion forces when interacting with other molecules of the same kind?

A. [tex]C_{4}H_{10}[/tex]

B. [tex]NaC_{2}H_{3}O_{2}[/tex]

C. [tex]CH_{2}C_{12}[/tex]

D. [tex]C_{2}H_{5}OH HF[/tex]

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The two lines show that these are the only two lines  that do not cause energy transition in the sodium atom. Option D

The spectrum of the sodium atom appears as a doublet. This implies that there are two lines in the spectrum and they appear as bright yellow lines that are not spaced apart in the spectrum.

The  two bright yellow vertical lines in the spectrum shows that these are the only two lines  that do not cause energy transition in the sodium atom.

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Organic molecules (amino acids) needed to be concentrated to stimulate reactions to form protein concentration mechanisms that do not include Boiling.

Amino acids are natural compounds composed particularly of nitrogen, carbon, hydrogen, and oxygen. Your body desires 20 awesome amino acids to grow and function. amino acid, any of a group of organic molecules that consist of a basic amino group (―NH2), an acidic carboxyl group (―COOH).

fruits have an excessive content of amino acid that allows modify insulin degrees. fruits like bananas, apples, berries, and so forth., are rich resources of amino acids.

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Taking into account the Avogadro's Law, 0.600 moles occupies 1.200 L.

Avogadro's Law is a gas law that relates the volume and amount of gas at constant pressure and temperature.

Avogadro's law states that volume is directly proportional to the amount of gas: increasing the amount of gas will increase the volume, while decreasing the amount of gas will decrease the volume.

Mathematically, this law states that the ratio between the volume and the amount of gas is constant:

[tex]\frac{V}{n} =k[/tex]

Assuming that there is a certain amount of gas n1 that occupies a volume V1 at the beginning of the experiment, by varying the amount of gas to a new value n2, then the volume will change to V2, and the following is true:

[tex]\frac{V1}{n1} =\frac{V2}{n2}[/tex]

In this case, you know:

Replacing in Avogadro's Law:

[tex]\frac{0.800 L}{0.400 moles} =\frac{1.200 L}{n2}[/tex]

Solving:

[tex]n2x\frac{0.800 L}{0.400 moles} =1.200 L[/tex]

[tex]n2=\frac{1.200 L}{\frac{0.800 L}{0.400 moles} }[/tex]

n2= 0.600 moles

Finally, 0.600 moles occupies 1.200 L.

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The equation that agrees with the ideal gas law is as follows: StartFraction V subscript 1 over T subscript 1 EndFraction equals StartFraction V subscript 2 over T subscript 2 EndFraction (option A).

Ideal gas law in physics is the equation of state of an ideal gas, which is a gas whose molecules do not interact or collide.

The equation of the ideal gas law is as follows:

PV = nRT

This equation shows that the volume is directly proportional to the volume of the gas.

Therefore, the equation that agrees with the ideal gas law is as follows: StartFraction V subscript 1 over T subscript 1 EndFraction equals StartFraction V subscript 2 over T subscript 2 EndFraction.

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option A, v1/t1 = v2/t2

A 17.10 g compound is made up of 5.900 g n and 11.20 g C.  the percent composition of carbon in this compound is 65.5%

The ratio of the amounts of each element to the sum of the individual element amounts present in the compound, multiplied by 100, is the definition of the percent composition of a given compound. In this instance, the quantity is expressed in grams of the constituent ingredients.

You may calculate the mole: mole ratio of the components present in a compound by knowing the % composition of the compound. You can determine the ion ratio in a chemical once you have this information. Mass percent composition is also referred to as mass percent. It is denoted by the symbol w/w percent. Mass percent composition for a solution is equal to the mass of an element in one mole of the compound divided by the compound's molar mass, multiplied by 100%.


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The concentration of the final solution will be 0.2886 M.

50.6 g of NaCl is dissolved in 600 mL of water.

Mole of 50.6 g NaCl = 50.6/58.44 = 0.8658 mol

Molar concentration of the oiriginal solution = 0.8658/06 = 1.4431 M

25 mL of 1.4431 M of the solution is diluted up to the 125 mL mark.

m1 = 1.4431, v1 = 25 ml, v2 = 125 mL

m2 = m1v1/v2 = 1.4431 x 25/125 = 0.2886 M

The concentration of the final solution will be 0.2886 M

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Model not supported is:

Thomson's atomic model of the atom from task 1 are not supported by Rutherford's experimental evidence.

Experiments given by Thomson, Rutherford & Dalton:

Dalton and Thomson's concepts are in conflict with the experimental findings of Rutherford. Dalton's model is unsupported by evidence because it does not include electrons, protons, or neutrons.

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