Find and fix each mistake in the following equilibrium constant expressions.

6H2(g)+P4(g)⇌4PH3(g)
Keq=[PH3][H2][P4]

N2O4(g)⇌2NO2(g)
Keq=[N2O4][NO2]2

Answer:

is an assumption , in an idea that is proposed for the sake of argument so that it can be tested to see if it might be true.

아 이거 끝이 없어

Answer:

Explanation:

Here, we want to get the volume of the gas at STP

According to the general gas law, we have it that:

where:

P1 is the initial pressure which is 280 mmHg

V1 is the initial volume which is 45 L

T1 is the initial temperature which is 750 K

P2 is the final pressure which is 1 atm (760 mmHg)

V2 is the volume that we want to calculate

T2 is the final temperature (0 degrees celsius is 273.15 K)

Substituting the values, we have it that:

The minimum entropy change of the heat-supplying source is -0.87 kJ/K.

In this case, given the initial conditions, we first use the 10-% quality to compute the initial entropy.

S₁ = 1.485  +  (0.1)(5.6865) = 2.0537 kJ/kg K

The entropy at the final state given the new 40-% quality:

S₂ = 1.4337  +  (0.4)(5.7894) = 3.7495 kJ/kg K

m₁ = 0.026/(0.001057   +  0.1 x 1.002643) = 0.257 kg

m₂ = 0.026/(0.001053   +  0.4 x 1.158347)  = 0.056 kg

ΔS + S₁  - S₂  + S₂m₂  - S₁m₁  -  sfg(m₂  -  m₁)  > 0

ΔS + 2.0537 -  3.7495 + (3.7495 x 0.056)  -   (2.0537 x 0.257)  - 5.6865( 0.056 - 0.257)  >  0

ΔS > -0.87 kJ/K

Thus, the minimum entropy change of the heat-supplying source is -0.87 kJ/K.

Learn more about entropy here: brainly.com/question/6364271

#SPJ1

Answer:

Explanation:

m= 80.0 g

Cp=0.8 J/gc

Change in T= 25

q=Cp X m X T  =0.8 X 80.0 X 25 =1600J

Postive q or enthalpy makes it endothermic.

The body of scientific knowledge is based on different Observations (Option C).

Observations in the scientific method are fundamental because it is the first step to raising scientific questions that may be explained through plausible hypotheses. Subsequently, hypotheses must be tested by experimental procedures.

In conclusion, the body of scientific knowledge is based on different Observations (Option C).

Learn more about observations in the scientific method here:

https://brainly.com/question/2505873

#SPJ1

Answer:B

Explanation:B can be reversed.

Answer:

Explanation:

Physical properties are characteristics of matter not associated with a change in chemical composition. Identity of the molecules do not change. A physical change is a change in state without changing the composition (e.g., melting wax, freezing water, grinding solids into powders).  Examples: density, color, melting and boiling points, evaporation, odor, taste, hardness, conductivity.

B. Honey dissolving in tea would be a physical change. The honey is not changing chemically but physically as it dissolves in the hot tea.

The equilibrium will move to the left as the volume increases, favoring the reactants. The equilibrium will move toward the side of the reaction where there are fewer moles when the volume is reduced.

For reference:

According to Le Chatlier's Principle, a system in equilibrium will adjust to a change in temperature, volume, or the number of moles in a reactant or product in order to maintain equilibrium.

To know more about equilibrium here-

https://brainly.com/question/28527601

#SPJ13

Answer: 0.04M.

Explanation: Using M1V1=M2V2, we can find the new molarity (M2).

We are given M1 and V1 with 0.119M and 25mL, we are also given V2 since it says we added 55mL to the original 25mL.

25mL+55mL = 80mL.

Let's convert mL to L by dividing by 1000.

V1 = 25ml/1000 = 0.025L

V2 = 80mL/1000 = 0.08L.

Now plug in and solve algebraically.

0.119 * 0.025 = M2 * 0.08.       Divide both sides by 0.08.

\(\frac{0.119*0.025}{0.08}\) = 0.037.

M2 = 0.037M

However, since we are given 25mL which only has 2 sig figs, the new molarity os 0.04M.

Diamond is composed of hexagonal rings in which sp3 hybridized carbon atoms are linked together.

Hybridization refers to the mixing of atomic orbitals to yield hybrid orbitals that are suitable for bonding. The energy of orbitals that combine to form hybrid orbitals must be close enough for such combination to take place.

Diamond is composed of hexagonal rings in which sp3 hbridized carbon atoms are linked together. Each carbon atom in diamond is tetrahedral.

Learn more: https://brainly.com/question/967776

The mixing of the two different orbitals to form a compound is called hybridization. For example mixing of s and p orbits.

The correct answer is sp3.

The arrangement of the elements in a different manner to form a new compound is called allotropes. For example, diamond and graphite are the allotropes of carbon.

The valence electrons are in p orbitals and p orbit mixed after the s orbitals.

Therefore, the correct answer is sp3

For more information, refer to the link:--

https://brainly.com/question/3523174

Answer:

The stratosphere

Explanation:

Answer:

It would look bigger and brighter

Explanation:

It would look bright as sunlight

1. The mechanical advantage of a movable pulley is 2. This means that the output force is twice the input force.

2. A block and tackle pulley is a combination of multiple pulleys that work together to provide a mechanical advantage. It consists of one or more fixed pulleys and one or more movable pulleys. The rope or cable passes through the pulleys, which are arranged in such a way that they reduce the amount of force required to lift a heavy load.

3. The mechanical advantage of a block and tackle pulley is determined by counting the number of rope segments that support the load. For example, if a block and tackle pulley system has two movable pulleys and two fixed pulleys, there will be three segments of rope supporting the load. The mechanical advantage will be equal to the number of segments of rope, which in this case is three. This means that the output force will be three times the input force.

Read more on pulley here:https://brainly.com/question/177456

#SPJ1

Answer:

A) 6.50 moles 0₂

Explanation:

In the reaction, 2 moles of Calcium oxide decomposes to produce 2 moles of Calcium and 1 mole of Oxygen gas.

So, when 6.50 moles of Calcium oxide decomposes, 6.50 x (1 mole O₂ / 2 moles Calcium oxide) = 6.50 x 0.5 = 3.25 moles of Oxygen gas will be produced.

And as 3.25 x 2 =  moles O₂,

Answer 5.0183 x 10^23 atoms in 10g of carbon!!! hope this helps :))

Explanation:

Answer:

Temperature is proportional to pressure, if you keep the temperature at a constant temperature the pressure stays constant.

A voltaic cell consists of a copper electrode in a solution of copper(II) ions and a palladium electrode in a solution of palladium(II) ions. The palladium is the cathode and its reduction potential is 0.951 V.

a)  Cu(s) → \(Cu^{2+}\)(aq) + 2\(e^-\)

b)   E°ox = -0.340 V

c)    Keq = 3.98 × 10²⁰

Voltaic and galvanic cells are the exact same thing; they only go by various names. The Luigi Galvani-inspired Galvanic cell is made up of two distinct metals joined together via a salt bridge and a porous disc in between each of the separate half-cells. It is sometimes referred to as an electrochemical or voltaic cell. Galvanic (as well as voltaic) cells produce an electric current through a redox process that is thermodynamically favoured. Each half-reaction occurs in its own compartment, or half-cell, which also contains an electrode.

a)     Cu(s) → \(Cu^{2+}\)(aq) + 2\(e^-\)

b)     E°cell = E°red + E°ox

   0.609 V = 0.951 V + E°ox

   E°ox = -0.340 V

c)  log Keq = n × E°/0.0592

   log Keq = 2 × 0.609 V/0.0592 = 20.6

   Keq = 1020.6 = 3.98 × 10²⁰

To know more about voltaic cell, here:

https://brainly.com/question/29186551

#SPJ1

It is assumed that a researcher is interested in examining the connection between a population's carbon monoxide levels and the density of automobiles.

It is evident from the study question that there are two factors: the amount of carbon monoxide present and the density of automobiles. The researcher is interested in determining how closely the variables are related. As a result, the study topic is one of association. The interval/ratio scale is used to assess both variables. The connection is presumed to be linear, and the data's simple random samples can be considered to come from a bivariate normal population. The Pearson correlation test is the right statistical analysis to employ since the variables are assessed on an interval ratio scale.

The following is the null hypothesis:

H0:=0: There is no relationship between carbon monoxide levels and automobiles density.

The alternative theory is as follows:

H0: 0: There is a substantial linear link between the density of automobiles and the carbon monoxide concentration.

learn more about monoxide here:

https://brainly.com/question/1427833

#SPJ4

Answer:

A. PbI2(s) ===> Pb2+(aq) + 2I-(aq)

B. Ksp = [Pb2+][I-]^2

C. 1.52 x 10^-3 M. It is equal to the moles/L of PbI2 that go into solution.

D. 2 x 1.52 x 10^-3 = 3.04 x 10^-3 M

E. Ksp = (1.52x10^-3)(2.31x10^-6) = 3.51 x 10^-9

Explanation:

In the given question, \(\rm PbI_2(s) \rightleftharpoons Pb^{2+}(aq) + 2I^-(aq)\) is the dissolution reaction of \(\rm PbI_2\) in water,   \(\rm Ksp = [Pb^{2+}][I^-]^2\) is expression for Ksp for \(\rm PbI_2\),  \(1.52\times 10^{-3 }\) mol/L is the concentration of \(\rm Pb^{2+ }\) in the equilibrium solution,  \(3.04\times 10^{-3}\) mol/L is the concentration of I- in the equilibrium solution and

\(1.40\times 10^{-8}\) is the solubility product of  \(\rm PbI_2\), respectively.

A reaction is a process that involves the transformation of one or more substances into one or more different substances.

1. The dissolution reaction of \(\rm PbI_2\) in water is:

\(\rm PbI_2(s) \rightleftharpoons Pb^{2+}(aq) + 2I^-(aq)\)

2. The expression for Ksp for \(\rm PbI_2\) is:

 \(\rm Ksp = [Pb^{2+}][I^-]^2\)

Where, \(\rm [Pb^{2+}]\) is the concentration of \(\rm Pb^{2+ }\) ions in solution and \(\rm [I^-]\) is the concentration of \(\rm I^-\) ions in solution.

3. The solubility of  \(\rm PbI_2\) is \(1.52\times 10^{-3 }\) mol/L. Since \(\rm PbI_2\) dissociates into one  \(\rm Pb^{2+ }\) ion and two \(\rm I^-\) ions, the concentration of  \(\rm Pb^{2+ }\) in solution is equal to the solubility of  \(\rm PbI_2\), which is \(1.52\times 10^{-3 }\) mol/L.

\(\rm [Pb^{2+}] = 1.52\times 10^{-3}\ mol/L\)

4. Since  \(\rm PbI_2\) dissociates into one \(\rm Pb^{2+ }\) ion and two  \(\rm I^-\) ions, the concentration of  \(\rm I^-\) ions in solution is twice the solubility of  \(\rm PbI_2\) .

\(\rm [I^-] = 2 \times 1.52\times 10^{-3 }\ mol/L\)

= \(3.04\times 10^{-3}\) mol/L

5. The solubility product of  \(\rm PbI_2\) can be calculated using the expression for Ksp and the concentrations of \(\rm Pb^{2+ }\) and  \(\rm I^-\) ions in solution.

\(\rm Ksp = [Pb^{2+}][I^-]^2\)

=  \(1.52\times 10^{-3 }\)  \(\times\) \(\rm (3.04\times 10^{-3} mol/L)^2\)

= \(1.40\times 10^{-8}\)

Therefore, the dissolution reaction of \(\rm PbI_2\) in water, expression for Ksp for \(\rm PbI_2\), the concentration of Pb2+ in the equilibrium solution, the concentration of I- in the equilibrium solution and solubility product of  \(\rm PbI_2\) is mentioned above.

Learn more about reaction here:

https://brainly.com/question/16737295

#SPJ4

The representation of carbons and hydrogens on the structure is shown on the attached image.

The structure given is 3-Methylhexane. 3-Methylhexane is a branched-chain alkane with the molecular formula \(C_{7} H_{16}\). It is also known as 2,3-dimethylbutane or isoheptane.

The molecule consists of a six-carbon chain with a methyl group (-CH3) attached to the third carbon atom from one end, and another methyl group attached to the second carbon atom from the same end, giving it a branched structure.

3-Methylhexane is a colorless liquid with a boiling point of 90-91°C and a density of 0.68 g/cm3. It is commonly used as a reference compound in gas chromatography and as a blending component in gasoline to improve octane rating.

Learn about 3-Methylhexane here https://brainly.com/question/24165638

#SPJ1

Answer:

18,300 J

Explanation:

In order to be able to answer this question, you must know the value of water's enthalpy of fusion,  

, which is listed as

ΔH↔ = 18,300J

Now, a substance's enthalpy of fusion tells you how much heat is needed in order to convert   of said substance from solid at its melting point to liquid at its melting point.

In water's case, an enthalpy of fusion equal to  

333.55 J g

333.55 J

of heat.

Your ice cube has a mass of  

55.0 g

24. The IUPAC name of the compound is 2,4-dimethyl-1-pentanal (Option B)

25. The IUPAC name of the compound is 5-methyl-3-octanone (Option C)

The international union of pure and applied chemistry (IUPAC) standard for naming organic compounds is given below:

24. The name of the compound is given as follow:

Thus, the IUPAC name of the compound is:

2,4-dimethyl-1-pentanal (Option B)

25. The name of the compound is given as follow:

Thus, the IUPAC name of the compound is:

5-methyl-3-octanone (Option C)

Learn more about IUPAC naming:

https://brainly.com/question/16180944

#SPJ1

The correct option is Option A - A Heterogeneous mixture

As it is given that the sample is partly gas (made up of C) and partly solid (made up of A & B), the unknown sample may be a heterogenous mixture (gas C + solid A-B), like smog (smoke + fog).

Chemically speaking, matter can be divided into pure substances and mixtures. Elements and compounds can be created from pure material. The two types of mixtures are heterogeneous and homogenous.

Based on their physical and chemical properties, materials can be grouped. Matter is anything that has mass and space. Any mix of gas, liquid, and solid material is possible. When a substance changes from one state of matter to another without changing its chemical composition, this is referred to as a physical transformation.

For such more question on solid:

brainly.com/question/5247691

#SPJ4

The following question may be like this:

Classification of matter: after a series of chemical analysis, it was determined that an unknown sample contains three types of atoms, a, b and c. atoms a and b are found to be bound together in the sample, where as atom c is by itself. the unknown sample is also partly gas, and partly solid, with the solid containing a and b.

Based on the above information, the unknown sample is

The unknown sample is a heterogeneous mixture, that is explained in the below section.

As it is given that the sample is partly gas (made up of C) and partly solid (made up of A & B), the unknown sample may be a heterogenous mixture (gas C + solid A-B), like smog (smoke + fog).

The matter can be classified into pure substances and mixtures. Elements and compounds can be created from pure material. The two types of mixtures are heterogeneous and homogenous.

Based on their physical and chemical properties, materials can be grouped. Matter is anything that has mass and space. Any mix of gas, liquid, and solid material is possible. When a substance changes from one state of matter to another without changing its chemical composition, this is referred to as a physical transformation.

To learn more about heterogeneous mixture check the link below-

https://brainly.com/question/1869437

#SPJ4

Complete question-

Classification of matter: after a series of chemical analysis, it was determined that an unknown sample contains three types of atoms, a, b and c. atoms a and b are found to be bound together in the sample, where as atom c is by itself. the unknown sample is also partly gas, and partly solid, with the solid containing a and b.

Based on the above information, the unknown sample is

a heterogeneous mixture

a homogeneous mixture

a pure substance, and it is a compound

a pure substance, and it is an element

Answer:Vinegar

Explanation:

Answer: 23

Explanation:

because it is been multiplyed by 3 has s 31 nucleons and has atomic numbe equal to 15. The number of electron having m = 0 i

Answer:

The number of electrons with magnetic quantum number m = 0 can be calculated from the atomic number of the element. The atomic number gives the number of protons, and thus the number of electrons in a neutral atom. For the anion X-3, we have 15 - 3 = 12 electrons. The magnetic quantum number m can have integer values from -j to +j, where j is a half-integer representing the total angular momentum quantum number of the electron. In this case, j can be equal to 1/2, 3/2, 5/2, and so on. For the lowest value of j, which is 1/2, the magnetic quantum number m can have two values, +1/2 and -1/2. Thus, there are two electrons with m = 0. The number of electrons with m = 0 is equal to the number of electrons in the lowest energy level, which is the 1s orbital. In this case, two electrons occupy the 1s orbital, and both have m = 0.

Explanation:

The empirical formula for dioxin (C₁₂H₄Cl₄O₂) is (C₆H₂Cl₂O).

We can determine the components of a chemical compound by looking at its formula. We can determine the precise number of atoms in a compound's molecule using its molecular formula. The ratio of these components is provided by the empirical formula. It is the compound's molecular formula scaled down to its lowest integer ratio.

Empirical formula for dioxin (C₁₂H₄Cl₄O₂) is (C₆H₂Cl₂O).

To determine the emperical formula:

Step1: Determine the masses.

Step 2: Multiply the grams by the atomic mass to get the number of moles.

Step 3: Subtract the least number of moles from the total number of moles of each element.

Learn more about the Emperical formula with the help of the given link:

https://brainly.com/question/21743699

#SPJ1

Answer:

Half circle

Explanation:

because in the next day between 5O'clock the sun will rise then the moon will therefore created to be in a half moon

Answer:

38.3 g

Explanation:

8) What mass of chlorine reacts with 20.0 g of iron to form iron(III) chloride?​

first write, then balance the equation

Fe + Cl2-------------> FeCl3

2Fe + 3Cl2----------> 2FeCl3

2 moles of Fe require 3 moles of Cl2

the atomic mass of Fe is 56

20/56= 0.36 moles of Fe

this requires o.36 X 3/2 = 0.54 moles of Cl2

Cl2 has a molar mass of 35.5 X 2=71

1 mole of Cl2 is 71g

0.54 moles is 0.54 X 71 g= 38.3 g

The mass of chlorine reacts with 20.0 g of iron to form iron(III) chloride is 38.3 g.

Mass is defined as a numerical representation of the fundamental characteristic of all matter, inertia.

It can also be defined as a dimensionless number used to describe the mass of a particle or item.

\(\rm 2Fe + 3Cl_2\rightarrow2FeCl_3\)

As per the reaction 3 mole of chlorine is required for 2 mole of fluorine.

Atomic mass of fluorine = 56

Moles of Fe = 20 / 56

                    =  0.36 moles

This require 0.36 x 3/2 = 0.54 moles of Cl₂

Molar mass of Cl = 35.5

So for Cl₂ = 2 x 35.5 = 71 moles

For 1 mole of Cl₂ = 71 moles is needed

So, for 0.54 moles = 71 x 0.54

                               = 38.3 g

Thus, the mass of chlorine reacts with 20.0 g of iron to form iron(III) chloride is 38.3 g.

To learn more about mass, refer to the link below:

https://brainly.com/question/19694949

#SPJ2