The chemical reaction that causes aluminum to corrode in air is given by: 4Al+3O2?2Al2O3, in which at 298 K deltaHrxn = -3352 kJ and deltaSrxn = -625.1 J/K.
1) What is the standard Gibbs free energy for this reaction? Assume the commonly used standard reference temperature of 298 K.
Express your answer as an integer and include the appropriate units.
2) What is the Gibbs free energy for this reaction at 5975 K ? Assume that ?H and ?S do not change with temperature.
Express your answer to two decimal places and include the appropriate units.
3) At what temperature Teq do the forward and reverse corrosion reactions occur in equilibrium?
Express your answer as an integer and include the appropriate units.

Answers

Answer 1

1. The standard Gibbs free energy change for the reaction is -3309 kJ/mol.

2. The Gibbs free energy change for the reaction at 5975 K is approximately -2621.24 kJ/mol.

3. There is no temperature at which the forward and reverse corrosion reactions occur in equilibrium.

1. The standard Gibbs free energy change for a reaction is given by the formula:

ΔG° = ΔH° - TΔS°

where ΔH° and ΔS° are the standard enthalpy and entropy changes, respectively, and T is the temperature in Kelvin.

Plugging in the given values, we get:

ΔG° = -3352 kJ/mol - (298 K)(-625.1 J/(mol·K))(1 kJ/1000 J) = -3309 kJ/mol

Therefore, the standard Gibbs free energy change for the reaction is -3309 kJ/mol.

2. To find the Gibbs free energy change at a higher temperature, we can use the formula:

ΔG = ΔH - TΔS

where ΔH and ΔS are the enthalpy and entropy changes, respectively, and T is the temperature in Kelvin.

We can assume that ΔH and ΔS do not change with temperature.

First, we need to convert the temperature to Kelvin:

5975°C + 273.15 = 6248.15 K

Plugging in the given values, we get:

ΔG = -3352 kJ/mol - (6248.15 K)(-625.1 J/(mol·K))(1 kJ/1000 J) ≈ -2621.24 kJ/mol

Therefore, the Gibbs free energy change for the reaction at 5975 K is approximately -2621.24 kJ/mol.

3. At equilibrium, the Gibbs free energy change is zero:

ΔG = 0 = ΔH - T_eqΔS

Solving for T_eq, we get:

T_eq = ΔH/ΔS

Plugging in the given values, we get:

T_eq = (-3352 kJ/mol)/(625.1 J/(mol·K)) ≈ -5361.98 K

This result is negative, which does not make physical sense. The negative sign indicates that the forward reaction is thermodynamically unfavorable and the reverse reaction is favorable at any temperature. Therefore, there is no temperature at which the forward and reverse corrosion reactions occur in equilibrium.

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Related Questions

Please help me!!!!!!!!!!!!!

Answers

1)The limiting reactant will be aluminum acetate

2) The mass of aluminum hydroxide formed will be 9.75 grams.

Stoichiometric problem

The equation of the reaction is as below:

[tex]Al(C_2H_3O_2)_3 + 3NaOH --- > 3C_2H_3NaO_2 + Al(OH)_3[/tex]

The mole ratio of the 2 reactants is 1:3.

Mole of 100 mL. 1.25 mol/L [tex]Al(C_2H_3O_2)_3[/tex] = 0.1 x 1.25 = 0.125 mol

Mole of 300 mL, 2.30 mol/L NaOH = 0.3 x 2.3 = 0.69 mol

Thus, aluminum acetate is limited.

Mole ratio of  [tex]Al(C_2H_3O_2)_3[/tex] and [tex]Al(OH)_3[/tex] = 1:1

Equivalent mole of [tex]Al(OH)_3[/tex] = 0.125 mol

Mass of 0.125 mole [tex]Al(OH)_3[/tex] = 0.125 x 78 = 9.75 grams.

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Hat product forms at the anode during the electrolysis of molten nabr?
a. Na+ (l) Na(l).
b. Br–(l).
c. Br^3–(I).
d. Br^2(g).

Answers

Reaction at anode

2 Br-​ (aq) -----> Br2 (g) + 2e-

The product formed at the anode is Br2 (g).

In chemistry and production, electrolysis is a technique that makes use of direct electric present-day (DC) to power an otherwise non-spontaneous chemical response.

Electrolysis is commercially crucial as a degree inside the separation of factors from clearly going on sources including ores the usage of an electrolytic cell.

The voltage that is wanted for electrolysis to occur is called the decomposition capacity. The word "lysis" way to split or break, so in phrases, electrolysis would imply "breakdown via power".

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What happens to iron in a bolt as the bolt rusts?

Answers

Answer:

write the following as fractions in their simplest form

What happens to heat energy when it is not increasing the temperature of the substance in the beaker

Answers

Answer:

See below

Explanation:

It is melting the ice ( or other solid) at a constant temperature...the solid will absorb heat as it melts but remain at the same temp

Consider the following equation in chemical equilibrium. C2H4(g) H2(g) C2H6(g) 137 kJ What happens to the amount of ethane (C2H6) when the temperature of the system is increased

Answers

The amount of ethane decreases

increasing the temperature (adding energy), will drive the reaction to the left

What happens to the amount of ethane (C2H6) when the temperature of the system is increased ?

C2H4(g) <--> C2H6(g) + 137 kJ

because this reaction is an exothermic reaction and the heat is a product of this reaction, So when the number of temperature increases

so (more heat will be added) so the reaction will go leftward (toward reactants ) so the amount of C2H4 & H2 will increase and the amount of ethane C2H6 will decrease.

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Listed following are some distinguishing characteristics of comets, meteors, and asteroids. Match these to the appropriate category of objects.

Answers

The distinguishing characteristics of comets, meteors, and asteroids are its composition.

What are the characteristics of comets, meteors and asteroids?

Asteroids are the fragments of rock that were left over from the creation of the solar system, Meteors are the rocks that enter the atmosphere of the Earth from space while on the other hand, Comets are the remnants of the formation of the solar system that are made of dust, rocks, and ice. All these materials i.e. comets, meteors and asteroids are different from one another due to its structure and chemical composition.

So we can conclude that the distinguishing characteristics of comets, meteors, and asteroids are its composition.

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? Question
The article mentions that the difference in the responses of men and women to the research study could be due to
confirmation bias. Use the Internet to look up "confirmation bias." Which of the following statements could support the
view that the difference is due to confirmation bias?
Select all the correct answers.
Many of the men may believe that they are fair and unbiased against women.
Many of the women may already believe that they face biases.
More men than women participated in the study.
The men who participated in the study were younger than the women.

Answers

Many of the men may believe that they are fair and unbiased against women.

Many of the women may already believe that they face biases.

What is confirmation bias ?

The propensity to seek for, understand, favor, and remember information that supports or confirms one's preexisting opinions or values is known as confirmation bias. People exhibit this bias when they choose facts that support their opinions while rejecting those that contradict them or when they interpret ambiguous facts as supporting their preexisting beliefs. Although confirmation bias cannot be completely avoided, it can be controlled, for instance, by critical thinking education and training.

Confirmation bias has been linked to poor decisions in the scientific, organizational, financial, and political spheres. These biases can preserve or reinforce views in the face of contradictory data and contribute to overconfidence in personal opinions.

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Answer:

Many of the men may believe that they are fair and unbiased against women.

Many of the women may already believe that they face biases.

Explanation:

A certain mass of nitrogen gas occupies a volume of 8.56 L at a pressure of 3.72 atm. At what pressure will the volume of this sample be 10.94 L

Answers

The final pressure of the nitrogen gas with the increase in volume is 2.91 atm.

What is Boyle's Law?

Boyle’s law is a gas law that states that the pressure exerted by a gas (of a given mass, kept at a constant temperature) is inversely proportional to the volume occupied by it.

The relation can be given as:

[tex]P_1V_1=P_2V_2[/tex]

The initial pressure of the gas, [tex]P_1[/tex] = 3.72 atm

The initial volume of the gas, [tex]V_1[/tex] = 8.56L

The final volume of the gas, [tex]V_2[/tex] = 10.94 L

Substituting the values, the final pressure [tex]P_2[/tex] is given as:

3.72 × 8.56 = [tex]P_2[/tex] × 10.94

[tex]P_2 =\frac{3.72 * 8.56}{10.94} \\\\P_2 =2.91 atm[/tex]

Therefore, the final pressure of the nitrogen gas with the increase in volume is 2.91 atm.

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Which answer best describes what is happening in the following reaction?

2C8H18 + 25O2 Right arrow. 16CO2 + 18H2O
This is not a redox reaction. It is an example of combustion.
This is a redox reaction in which octane (C8H18) is the reducing agent.
This is a redox reaction in which carbon dioxide (CO2) burns due to ignition.
This is not a redox reaction, because a solution of carbon dioxide and water results.

Answers

The statement that best describes what is happening in the following reaction is this is not a redox reaction, It is an example of combustion (option A).

What is a combustion reaction?

A combustion reaction is a reaction wherein a substance is combined with oxygen, usually at high temperature, releasing heat.

According to this question, octane undergoes a combustion reaction to produce carbon dioxide and water as follows: 2C8H18 + 25O2 = 16CO2 + 18H2O

Therefore, the statement that best describes what is happening in the following reaction is this is not a redox reaction, It is an example of combustion.

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Answer:

A: This is not a redox reaction. It is an example of combustion.

Explanation:

Life alters the atmosphere by producing and removing _____________________, carbon dioxide, and methane.

Answers

Life alters the atmosphere by producing and removing oxygen, carbon dioxide, and methane.

Burning fossil fuels like coal, and natural gas, including oil, solid waste, trees, and other biological materials release carbon dioxide into the atmosphere, along with some chemical reactions.

It is thought that the first billion years of Earth's history saw a lot of volcanic activity. With little to no oxygen, the early atmosphere was presumably primarily composed of carbon dioxide.

Therefore, life alters the atmosphere by producing and removing oxygen, carbon dioxide, and methane.

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Calcium (Ca) and diatomic oxygen (O2) combine to form calcium oxide (CaO). The data table below compares the properties of these substances.

Calcium (Ca) Oxygen (O2) Calcium Oxide (CaO)
Melting Point (°C) 842 −218.4 2613
Density (g/cm3) 1.54 0.00143 3.34
Appearance silvery-white
metal colorless,
odorless gas white, odorless
powder

What can be concluded from this data?
A.
A chemical reaction occurred because calcium oxide has different properties than calcium and diatomic oxygen.
B.
A chemical reaction did not occur because solid calcium cannot chemically react with diatomic oxygen gas.
C.
A chemical reaction did occur because calcium oxide has similar properties to calcium and diatomic oxygen.
D.
A chemical reaction did not occur because calcium oxide is not a new substance.

Answers

A chemical reaction occurred because calcium oxide has different properties than calcium and diatomic oxygen. The correct option is A.

What are chemical reactions?

A chemical reaction is said to occur when the chemical properties of substances change during the course of the reaction.

From the illustration, the chemical properties of calcium oxide are unique from that of calcium and oxygen. Thus, calcium oxide has become a new substance entirely.

Once a reaction leads to the formation of new substances, such a reaction is a chemical reaction.

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About how long does it take for the reaction to reach equilibrium in this concentration versus time graph?

a graph of reactant and product concentration vs. time; a red curve shows the reactant concentration decreasing while two blue curves show the product concentration increasing with time; both blue curves intersect the red curve; the chemical equation is water reacting to produce hydrogen and oxygen

A.
0.5 second
B.
1.5 seconds
C.
2.5 seconds
D.
4.5 seconds

Answers

The time taken for the reaction to reach equilibrium in this concentration versus time graph is 4.5 seconds and is denoted as option D.

What is Time?

This refers to the duration in which a certain action or activity takes place with its unit being seconds.

From the graph we can deduce that:

The two blue lines, the concentrations of H₂ and O₂, become flat between 4 and 5 seconds.The red line, the concentration of H₂O, becomes flat, also, between 4 and 5 seconds.

This therefore means that the time taken for the reaction to reach equilibrium in this concentration versus time graph is 4.5 seconds.

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Answer: 4.5 is right just took the test.

Explanation:

If you were presented with 2 liters of a 2m sucrose stock solution, how many grams of sugar would be in a 100ml aliquot?

Answers

Answer:

68.46 gms

Explanation:

2 molal solution means there is 2 moles of sucrose per kg of solvent (generally 1000 cc)

2 moles / 1000 ml * 100 ml = .2 moles

mole weight of sucrose = 342.3 gm/mole

342.3 gm/mole * .2 mole = 68.46 gms

When testing the temperature of catalase, what would happen if you changed the temperature using the same tube with the same catalase and hydrogen oxide mixture?.

Answers

The substrate and enzyme would bind and react before all temperatures could be tested.

Before all temperatures could be tested, the enzyme would stop functioning after a short while.

What happens to the substrate and the enzyme?

The enzyme and the substrate would bind and the reaction would breakdown hydrogen peroxide into hydrogen and oxygen. Once the majority of the substrate was consumed, the reaction would not proceed even if the enzyme was at the optimal temperature.

Specific substrate binding is a property of enzymes. For example, the enzyme catalase exclusively binds to hydrogen peroxide as a substrate.

The enzyme forms a complex with the substrate when it attaches to its active site, breaking down the substrate into products.

I understand the question you are looking for is this:

When testing the temperature of catalase, what would happen if you changed the temperature using the same tube with the same catalase and hydrogen oxide mixture?

The substrate would stop working after a few minutes before all temperatures could be tested.The enzyme would stop working after a few minutes before all temperatures could be tested.The substrate and enzyme would bind and react before all temperatures could be tested.

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A molecule that contains delocalized electrons ________

Answers

Answer:

benzene molecule

Explanation:

The molecules exhibiting delocalization of electrons will have at least two resonance structures. These two resonance structure are having the equal energy.

What is resonance?

Resonance is an electronic property of molecules by which, the sigma bond or pi bond moves from one location to other forming different mesomeric structures of the compound.

For example carbon dioxide can have two resonance structures.The lone pair in oxygen delocalize from one oxygen to the other. The double bond with carbon can be of either side of carbon. Thus one negative charge forms for one oxygen. This charge can be on the second hydrogen too.

In this way free electrons can delocalise through the orbitals and this process make the molecule more stable. The resonance structures together form the canonical structure which is the most probable and stable form of the compound.

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A student started with 0.3295 g of copper. The mass of filter paper and copper (II) oxide product was found to be 0.5723 g, and that of the filter paper alone was 0.2568 g. Calculate the percent yield of copper (II) oxide.

Answers

The percent yield will be 95.75%

Percent yield

Mass of copper = 0.3295 g

Mass of filter paper + copper (II) oxide = 0.5723

Mass of filter paper only = 0.2568

Mass of copper (II) oxide = 0.5723 - 0.2568 = 0.3155

Percent yield = yield/total x 100%

                      = 0.3155/0.3295 x 100% = 95.75%

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Help, Kinda struggling here

Answers

The water cycle will be discussed here.

What is Water cycle?

This is defined as the continuous manner in which water is moved within the earth and the atmosphere.'

The water cycle comprises of steps such as:

EvaporationCondensationPrecipitation

Humans however disrupt water cycle through the damming of rivers and deforestation.

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Vinegar contains carbon, hydrogen, and oxygen with percent masses of 40.01% C, 6.70% H, and 53.29% O, respectively. Determine the empirical and molecular formulas of the compound. The molar mass of vinegar is about 60 g/mol. HOW DO WE GET THERE

Answers

The empirical formula is = C2H4O2

Molecular formula=C2H4O2

Calculation of Molecular formula and empirical formula:-

Vinegar has three elements:

oxygen = 53.29%,

hydrogen = 6.70%,

and carbon = 40.01%.

We can create an equation for the total mass of vinegar with 'a' carbon atom,' b' hydrogen atom, and 'c' oxygen atoms using the molar masses of C, H, and O.

12*a + 1*b + 16*c = 60

We also know that C makes up 24 g/mol, or 40.01 percent, of the overall mass of 60 g/mol.

The formula contains two C atoms because each C atom has a molecular mass of 12 g/mol. You may determine that the formula contains 4 H and 2 O atoms by using the same reasoning for H and O.

The empirical formula is = C2H4O2

Molecular formula= (C2H4O2)n

(4 x 12 + 1 x 4 + 16 x 2)n = 60

(84)n = 60

n=60/84

n=0.71=1

Molecular formula=C2H4O2

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Which of the following measurements
have four significant figures? Select all
that apply.

Answers

Answer:

1.001

120.0

Explanation:

Significant figures are used in science to determine the precision of a number. Depending on the decimal point, sig figs are counted in different ways.

Decimal Points

When counting sig figs, you always start at the first non-zero number. However, sometimes you start from the left, other times the right.

If the decimal point is present, start counting sig figs from the left.If the decimal point is absent, start counting sig figs from the right.

Remember to start counting at the first non-zero number.

For people in the Americas, there is a trick to remembering this.

If this decimal is Present, start from the Pacific. If it is Absent, start from the Atlantic.

This works because the Pacific ocean is to the left of the Americas, and the Atlantic is to the right.

4 Significant Figures

The number 1.001, has 4 significant figures. Since there is a decimal point, we start counting from the left. The first digit is not zero, so we count all four places as significant.

The number 120.0 also has 4 sig figs. Like the number above, we start counting from the left because of the decimal. The first digit on the left is not zero, so we once again count all 4 digits as significant.

a group of atoms of more than one elements forms

Answers

Considering the definition of chemical compounds, a group of atoms of more than one elements forms chemical compounds.

What is a chemical compound

Chemical Compounds are substances that are made up of a minimum of 2 elements that have reacted with each other to give another substance different from the initial elements. Elements are held together by what is known as a chemical bond.

In other words, a chemical compound is any substance formed by the union of two or more types of chemical elements, that is, by atoms of two or more different types of chemical elements, joined together by chemical bonds in certain proportions.

A chemical compound can be separated into its constituent elements by chemical reactions.

Summary

In summary, a group of atoms of more than one elements forms chemical compounds.

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26.10 mL of a 0.250 M potassium carbonate solution is reacted with excess hydroiodic acid. How many grams of gas formed are in the balanced equation

Answers

Answer:

Below in bold.

Explanation:

The equation is:

K2CO3 + 2HCl ---->  2KCl + CO2 + H2O

So 1 mole of K2CO3 produces 1 mole of CO2.

Number of moles of K2CO3 in the solution

= 0.25 * 26.10 / 1000

= 0.00625 moles

This produces 0.00625 moles of CO2

which is 0.00625*44

= 0.2871 grams.

A diprotic acid is titrated with a strong base. The pH at the first half-equivalence point is 3.27. The pH at the second half-equivalence point is 8.53. What is the value of ka2

Answers

A diprotic acid is titrated with a strong base. The pH at the first half-equivalence point is 3.27. The pH at the second half-equivalence point is 8.53. The value of ka2 is 27.89.

What is pH ?

pH is used to measure whether the substance is acidic, basic or neutral and the range is 0-14. If the pH is less than 7 then the solution is acidic in nature. if the pH is more than 7 then the solution is basic in solution. If the pH is equal to 7 then the solution is neutral in nature.

How to find the polyprotic value ?

To find the polyprotic value

[tex]K_{a_2}[/tex] = pH of first half equivalence point × pH of second half equivalence point

[tex]K_{a_2}[/tex] = 3.27 × 8.53

      = 27.89

Thus from the above conclusion we can say that A diprotic acid is titrated with a strong base. The pH at the first half-equivalence point is 3.27. The pH at the second half-equivalence point is 8.53. The value of ka2 is 27.89.

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Compare how fast the rate of CO2 increase is in the last few hundred years with the rate of increase (or decrease, for that matter) in the preceding 400,000 years. What are the primary factors driving this change (that weren't present before

Answers

The rate of CO2 increase is in the last few hundred years is 10 times more with the rate of increase (or decrease, for that matter) in the preceding 400,000 years.

There are many possible reasons for this cause , some primary factors are listed below:

Increase in populationincreased emission of green house gases, as we all know auto mobile industry is growing rapidly and this vehicles releases harmful gases like CO2, CO ,etc. and increases carbon % , this CO2 is a main gas component in green house effect.Deforestation, as the amount of plant decreases the CO2 present in atmosphere increases, plants uses CO2 and sun lite to make their food via photosynthesis.Increased emission of Industrial flue gases, etc.

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How does the appearance of
the protist differ from that of the onion sample?

Answers

The appearance of the protist differ from that of the onion sample due to the presence of motile structures.

What is a Protist?

This is an eukaryote which could be unicellular or multicellular and examples include protozoa etc.

The major difference between a protist and onion sample is that protists have motile structures such as flagella, cilia etc while plant cells such as onions don't have.

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The solubility of pbso₄ in water at 25 °c is 7. 9 × 10⁻⁴ m. What is ksp for pbso₄?.

Answers

ksp = 2S²

= 2 [ 7.9* 10-⁴ moldm-³ ]²

= 124.82 * 10-⁸ mol² dm-⁶

The term Ksp denotes the solubility product. It is generally used to predict the precipitation of reactions. The  Ksp of PbSO₄ is  6.24 × 10⁻⁷.

What is solubility product?

The solubility product of a sparingly soluble salt is defined as the product of the molar concentrations of its ions in a saturated solution of it at a given temperature. By knowing the solubility product of a substance, it is possible to predict whether a substance precipitate out or not.

In short, the precipitation of an ionic substance from the solution occurs when the ionic product exceeds the value of its solubility product at that temperature.

Here PbSO₄ dissociates as:

PbSO₄ → Pb²⁺ (aq) + SO₄²⁻ (aq)

Ksp = [Pb²⁺] [SO₄²⁻ ]

= [7. 9 × 10⁻⁴] [7. 9 × 10⁻⁴]

= 6.24 × 10⁻⁷

Thus the value of Ksp is  6.24 × 10⁻⁷.

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EXPERIMENT 1: How do you expect your coarse titration volume at the color change to compare to your fine titration volumes?

Answers

In the endpoint when the indicator changes color it gives the information that the acid is neutralized by the base.

What is Titration ?

Titration is also known as titrimetry is a technique where a solution of known concentration is used to calculate the concentration of the unknown solution. Titration is a laboratory technique.

What is Endpoint ?

The point at which the indicator changes the color is known as Endpoint.

Thus from the above conclusion we can say that In the endpoint when the indicator changes color it gives the information that the acid is neutralized by the base.

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By replacing hardware safety features with software controls in the therac-25 machine, aecl was able to?

Answers

Therac-25, AECL was able to reduce costs by replacing hardware safety features with software controls.

the Therac-25 was a laptop-controlled radiation therapy machine produced by Atomic energy state Canada limited in 1982 after the Therac-6 and Therac-20 units. It was involved in at least six accidents between 1985 and 1987, in which patients were given massive overdoses state radiation.

The Therac-25 machine was a state-of-the-art linear accelerator developed by using the company Atomic strength Canada restricted (AECL) and a French company CGR to provide radiation treatment to cancer sufferers. The Therac-25 become the most computerized and complicated radiation therapy device state its time.

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The following reversible reaction is at equilibrium. If the concentration of HCI is increased, how would
the system react?
NH4CI NH3 + HCI

A. Nothing would change.
B. The reaction would move to the right, producing more NH3.
C. The reaction would move to the left, producing more NH4CI.
D. There would only be HCI remaining.

Answers

Answer:

C.) The reaction would move to the left, producing more NH₄CI.

Explanation:

The chemical equation:

NH₄Cl ↔ NH₃ + HCl

If you were to increase the amount of HCl, the equilibrium would shift to the left. This is because the system is trying to go back to equilibrium. The equilibrium was disturbed when more product (HCl) was added. In order to restore equilibrium, you need to do the same thing that was done to the products to the reactants. In other words, since the products increased, the reactants need to increase.

state and appearance sodium chloride

Answers

Sodium chloride is white, crystalline solid at room temperature.

Sodium chloride

It is a compound whose components atoms are sodium and chlorine.

The atoms of the two elements combine chemically through an ionic bond. The sodium donates it valence electron to the chlorine atom.

Thus, sodium chloride is an ionic compound. It has a characteristic white appearance and crystalline structure.

The compound is a solid at room temperature. It has a melting point of 801 °C.

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Which answer best describes what is happening in the following reaction?

2C8H18 + 25O2 Right arrow. 16CO2 + 18H2O
This is not a redox reaction. It is an example of combustion.
This is a redox reaction in which octane (C8H18) is the reducing agent.
This is a redox reaction in which carbon dioxide (CO2) burns due to ignition.
This is not a redox reaction, because a solution of carbon dioxide and water results.

Answers

A.  This is not a redox reaction. It is an example of combustion.

Combustion reaction of hydrocarbon

During the combustion of a hydrocarbon, the hydrocarbon reacts with oxygen to create carbon dioxide, water, and heat.

Example of combustion reaction

2C8H18 + 25O2 → 16CO2 + 18H2O

Thus, we can conclude that, this is not a redox reaction. It is an example of combustion.

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Answer:

A: This is not a redox reaction. It is an example of combustion.

Explanation:

Other Questions
You are doing a peer review of a science experiment. The paper claims that an increase of pressure requires a grateer additional of thermal energy to change a liquid to a gas. Why this is true? chlorine has two stable isotopes, and . calculate the binding energies per mole of nucleons of these two nuclei. the required masses (in g/mol) are = 1.00783, = 1.00867, = 34.96885, and = 36.96590. medical air compressors that are designed to seperate the oil containing section from the compression chamber shall be provided with a coalescing filter with a ______? what can be done to alleviate the gag reflex when taking alginate impressions-use fast-set alginate -do not overload posterior region of tray -have patient take deep breaths through the nose hardwood flooring and tile quantity takeoffs are typically calculated in __________. you can override the default order by using parentheses around the expressions that you want to calculate first.T/F What is the final temperature when 625 grams of water at 75.0 deg C loses 7.96 x 10^4 J? (hint: remember T = Tfinal - Tinitial ) The degree of economic development can be used as a rough measure of a country's industrial market. True. With respect to Rostow's five-stage model of ... TRUE OR FALSE the distinction between procedural and distributive justice is the difference between the process and the content, respectively. Item response theory is to latent trait theory as observer reliability is to:In the test-retest method to estimate reliability:Reliability, in a broad statistical sense, is synonymous with: lysyl oxidase is an enzyme that links lysine amino acids in adjacent proteins together in a process called crosslinking. you would expect this enzyme to be found most commonly in ____ A soap film (n = 1.33) is 772 nm thick. White light strikes the film at normal incidence. What visible wavelengths will be constructively reflected if the film is surrounded by air on both sides? auditors should test the reasonableness of sales tax payable by Select the correct answer from each drop-down menu. A graph of quadrilateral 1 with the nodes of (minus 3, 7), (minus 4, 9), (minus 7, 9), and (minus 4, 5). Transformation of quadrilateral 2 with the nodes of (3, minus 4), (3, 6), (8, 2.8), and (7.2, minus 1.9). Quadrilateral 1 and quadrilateral 2 are polygons that can be mapped onto each other using similarity transformations. The transformation that maps quadrilateral 1 onto quadrilateral 2 is a followed by a dilation with a scale factor of . Which of the following is NOT an effect of urbanization in Latin AmericaA:The growth of cities has been unplanned, so governments cannot provide services for allB: Water scarcity is decreasingC:Many cities have some of the worst air quality in the worldD:Improper ware disposal is increasingly an issue The Kb value of the oxalate ion, C2O42-, is 1.9 10-10. Is a solution of K2C2O4 acidic, basic, or neutral? Explain by selecting the single best answer. Select answer from the options below Neutral, because the K2C2O4 does not dissolve in water. Neutral, because K2C2O4 is a salt formed when oxalic acid is neutralized by KOH. Acidic, because the oxalate ion came from oxalic acid. None of these. Basic, because the oxalate ion hydrolyzes in water. At the start of the , the unemployment rate increased from 1. 5 million to 15 million, and the of the country decreased from $104 billion to $59 billion suppose that the aggregate demand and aggregate supply schedules for a hypothetical economy are as shown in the following table. lo12.5 a laser emits a narrow beam of light. the radius of the beam is 7.8 mm, and the power is 3.8 mw. what is the intensity of the laser beam? connies cakes wants to know how much and when cash went out last year. which is the best financial statement to find this information?