For the reaction: C → D + B the graph of ln k vs 1/T(K) gives the equation: y = -2.2x104x + 45.0. Using this information, calculate the activation energy, (J/mol)

Answers

Answer 1

From the equation of the graph, the activation energy of the reaction is -2.2 * 10⁴ J/mol.

What is activation energy?

Activation energy is the minimum required energy that reactant molecules must possess for a reaction to proceed towards formation of products.

The activation energy is determined from the slope of ln k against 1/T(K).

Given the equation, y = -2.2 * 10⁴ x + 45.0.

Comparing with the equation of a straight line, y = mx + c

The gradient, m = -2.2 * 10⁴

Therefore, the activation energy of the reaction is -2.2 * 10⁴ J/mol.

In conclusion, reactant molecules must break the activation energy barrier in order to form products.

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Related Questions

14. What volume of water vapor in liters could be generated at 1.01 atm and 420. K by the combustion of 273.36 grams of oxygen gas excess pentane gas (C5H12)?

C5H12(g) + 8 O2(g) ---> 5 CO2(g) + 6 H2O(g)

(OR C5 H12 ("g") + 8 O2 ("g") right arrow 5 C O2 ("g") + 6 H2 O ("g")




Do not type units with your answer

Answers

Answer:

776 L H₂O

Explanation:

To find the volume, you need to use the Ideal Gas Law. The equation looks like this:

PV = nRT

In this equation,

-----> P = pressure (atm)

-----> V = volume (L)

-----> n = number of moles

-----> R = constant (0.0821 L*atm/mol*K)

-----> T = temperature (K)

To find the volume of water vapor, you need to (1) convert grams C₅H₁₂ to moles C₅H₁₂ (via molar mass), then (2) convert moles C₅H₁₂ to moles H₂O (via mole-to-mole ratio from reaction coefficients), then (3) calculate volume H₂O (via Ideal Gas Law). The final answer should have 3 sig figs.

(Step 1 & Step 2)

Molar Mass (C₅H₁₂): 5(12.011 g/mol) + 12(1.008 g/mol)

Molar Mass (CH₁₂): 72.151 g/mol

1 C₅H₁₂ (g) + 8 O₂ (g) -----> 5 CO₂ (g) + 6 H₂O (g)

273.36 g C₅H₁₂           1 mole            6 moles H₂O
-----------------------  x  ----------------  x  -----------------------  =  22.7 moles HO
                                  72.151 g           1 mole C₅H₁₂

(Step 3)

P = 1.01 atm                R = 0.0821 L*atm/mol*K

V = ?                           T = 420 K

n = 22.7 moles

PV = nRT

(1.01 atm)V = (22.7 moles)(0.0821 L*atm/mol*K)(420 K)

(1.01 atm)V = 783.856

V = 776 L

Without units, your answer would be 776.

Scenario A
Julio was given the task to produce 59 grams of iron(III) oxide, 23
F
e
2
O
3
. They had one tank of oxygen gas, 2
O
2
and 54 grams of solid iron,
F
e
. They knew that if he heated the iron in the presence of the oxygen gas, they could produce the iron(III) oxide. Since they had such little amount of iron, they decided to use as little of the iron as they could to produce the 59 grams of iron(III) oxide. Julio measured out 41 grams of iron and heated it with excess oxygen. Assume Julio's reaction went 100%. Julio was very happy that their reaction produced the 59 grams.
Scenario B
Gretchen was given the task to produce 19 grams of aluminum fluoride, 3
A
l
F
3
. They had a tank of fluorine gas, 2
F
2
, and 7 grams of solid aluminum,
A
l
. They knew that if they heated the aluminum in the presence of excess fluorine gas, they could produce the aluminum fluoride. Since Gretchen had such little amount of aluminum, they decided to use as little of aluminum as they could to produce the 19 grams of aluminum fluoride. Gretchen measured out 5 grams of aluminum and heated it with excess fluorine gas. Assume Gretchen's reaction went 100%. Gretchen was very happy their reaction produced the 19 grams.


Question #1: Which scientist did the experiment incorrectly? (1 pt)
Question #2: Explain what the scientist did incorrectly. Be sure to include the balanced equation for each scientist. Show the stoichiometry and explain in complete sentences why one experiment is wrong and the other is not. (4 pts)
Question #3: Explain specifically what the scientist should do to make the experiment correct (use numbers to support your answer). Also, include the stoichiometry to show how the scientist can make the experiment correct. (3 pts)
As you answer the questions above, use complete sentences to explain the stoichiometry you show and use proper grammar and spelling (1 pt)

Answers

Based on the mole ratio of the balanced equation of the reactions;

Gretchen did the experiment incorrectlyGretchen did not measure the accurate mass of aluminum required to produce 19 g of aluminum fluorideGretchen needs to react 6.1 g of Al in excess fluorine in order to produce 19 g of AlF₃

What mass of iron(III) oxide is produced from reacting 41 g of Fe with excess oxygen?

The equation of the reaction is given below:

4 Fe + 3 O₂ → 2 Fe₂O₃

Based on the reaction, mole ratio of Fe and Fe₂O₃ is 2 : 1

Moles of Fe reacted = 41/56 moles

Mass of Fe₂O₃ produced = 41/56 * 1/2 * 160 = 58.6 g

What mass of aluminum fluoride is produced from reacting 5 g of aluminum with excess fluorine?

The equation of the reaction is given below:

2 Al + 3 F₂ → 2 AlF₃

Based on the reaction, mole ratio of Al and AlF₃ is 1 : 1

Moles of Al reacted = 5/27 moles

Mass of AlF₃ produced = 5/27 * 84 = 15.5 g

This is less than the required mass of AlF₃

Moles of AlF₃ in 19 g = 19/84 = 0.2262 moles

Mass of Al required = 0.2262 * 27 = 6.1 g

Based on the results above;

Gretchen did the experiment incorrectlyGretchen did not measure the accurate mass of aluminum required to produce 19 g of aluminum fluorideGretchen need to react 6.1 g of Al in excess fluorine in order to produce 19 g of AlF₃

In conclusion, the mole ratio of the reactions obtained from the equation are required to know the accurate masses of reactants required.

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Which of these safety features aims to keep nuclear radiation contained

Answers

The safety feature aimed at keeping nuclear radiation contained is steel-reinforced concrete.

What is nuclear power plant?

A nuclear power plant is a building with reactors that contain controlled nuclear reactions to produce energy.

Nuclear power plants are able to generate warm water by using atomic properties of matter  (i.e.,m the process of nuclear fission), which is in turn converted into steam to move turbines.

The walls of nuclear power reactors are composed of steel-reinforced concrete in order to avoid radiation release.

In conclusion, the safety standard property that maintains nuclear radiation contained is steel-reinforced concrete.

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How much heat will be released (AH) if
0.1579 mol of NH3 are mixed with 0.20 mol of
O₂ in the following chemical reaction?
4 NH3(g) + O₂ (g) → 2 N₂H4 (g) + 2 H₂O(g)
AH = -286 kJ/mol

Answers

Answer:

11.29 kJ (to 4 sf)

Explanation:

Here, ammonia is the limiting reactant.

For the reaction to occur once, 4 moles of ammonia must be consumed.

Thus means that the reaction can occur 0.1579/4=0.039475 times.

Therefore, (286)(0.039475) = 11.29 kJ (to 4 sf)

What’s the correct answer answer asap for brainlist

Answers

Answer:

Vast Territory

Explanation:

Russia is a very big area. It makes sense that some parts vary in their climate.

Explanation:

We gujra weeeeeeeeeeeee

We gujra weeeeeeeeeeeee

We gujra weeeeeeeeeeeee

We gujra weeeeeeeeeeeee

Determine the empirical formulas for compounds with the following percent compositions:
. 81.68% carbon and 18.32% hydrogen

Answers

The empirical formula of a compound that has the following percent composition; 81.68% carbon and 18.32% hydrogen is C2H5.

How to calculate empirical formula?

The empirical formula is a notation indicating the ratios of the various elements present in a compound, without regard to the actual numbers.

The empirical formula of a compound that has 81.68% carbon and 18.32% hydrogen can be calculated as follows:

81.68% C = 81.68g 18.32% H = 18.32g

First, we convert mass to moles;

C = 81.68g ÷ 12g/mol = 6.81mol H = 18.32 ÷ 1g/mol = 18.3mol

Next, we divide each mole value by the smallest (6.81mol)

C = 6.81 ÷ 6.81 = 1H = 18.32 ÷ 6.81 = 2.7

We multiply each ratio by 5 to make an whole number:

C = 1 × 2 = 2H = 2.7 × 2 = 5.4 = 5

Therefore, the empirical formula of a compound that has the following percent composition; 81.68% carbon and 18.32% hydrogen is C2H5.

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A student analyzed a sample of sea water and found that it contained 2.3g of NaCi, 0.005g of MgSo4, 0.234g of CaCI2 and 60.12g of H2O. Total mass of the sample is

Answers

[tex]2.3+0.005+0.234+60.12=\boxed{62.659 \text{ g}}[/tex]

Which of the following summarizes a change that takes palace as solid turns to liquid? A. particles have a decrease in mobility. B. particles move closer together. C. particles become less ordered. D. intermolecular forces between particles become stronger.
Which of the following is a group that can be measured against the experimental group. A. variable. B. responding. C. manipulated. D. contro

Answers

The change that takes palace as solid turns to liquid is that particles become less ordered. That is option C.

The group that is measured against the experimental group is control group. That is option D.

What is change of state?

Change of state of a substance is the reversible changes that occurs in that substance which may include:

melting,

freezing,

sublimation,

deposition,

condensation, and vaporization.

When a solid turns into liquid, it becomes less ordered because there is reduction of the intermolecular forces existing between the molecules of the substance.

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Answer: (C) particles become less ordered

Explanation:

Melting - When a solid is heated, it absorbs energy and it melts, turning into a liquid. Boiling - If the liquid is heated, it absorbs more energy and it boils, turning into a gas

Which example involves phase change in which heat energy is released by the substance?

Answers

Answer:

Example that involves phase change in which heat energy is released by substance:

Explanation:

If heat is removed from a substance, such as in freezing and condensation, then the process is exothermic. In this instance, heat is decreasing the speed of the molecules causing them move slower (examples: liquid to solid; gas to liquid). These changes release heat to the surroundings.3 days ago

Solid → Liquid: Melting or fusion

Gas → Liquid: Condensation

Liquid → Gas: Vaporization

Liquid → Solid: Freezing

Allyl sulfide, C6H10S, is a compound that has the odor of garlic. How many moles of Allyl sulfide are in 125 g?

Answers

Considering the definition of molar mass,  1.096 moles of Allyl sulfide are in 125 g.

Definition of molar mass

The molar mass of substance is a property defined as its mass per unit quantity of substance, in other words, molar mass is the amount of mass that a substance contains in one mole.

The molar mass of a compound (also called Mass or Molecular Weight) is the sum of the molar mass of the elements that form it (whose value is found in the periodic table) multiplied by the number of times they appear in the compound.

Molar mass of C₆H₁₀S

In this case, you know the molar mass of the elements is:

C= 12 g/moleH= 1 g/moleS= 32 g/mole

So, the molar mass of the compound C₆H₁₀S is calculated as:

C₆H₁₀S= 6× 12 g/mole + 10× 1 g/mole + 32 g/mole

Solving:

C₆H₁₀S=  114 g/mole

Moles in 125 g CH₂Cl₂

Next, you can apply the following rule of three: If by definition of molar mass 114 grams of the compound are contained in 1 mole, 125 grams of the compound are contained in how many moles?

[tex]amount of moles=\frac{125 grams x 1 mole}{114 grams}[/tex]

amount of moles= 1.096 moles

Finally, 1.096 moles of Allyl sulfide are in 125 g.

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what mass of water is produced from 2.5g of glucose?

Answers

From the calculation, there are 1.5 g of water produced in the reaction.

What is an equation?

An equation shows the chemical transformation that takes place in a reaction vessel. In this case, the equation is; C6H12O6 + 6 O2 --> 6 CO2 + 6 H2O.

Now;

Number of moles of glucose = 2.5g/180 g/mol = 0.014 moles

Since 1 mole of glucose produces 6 moles of water

0.014 moles of glucose produces 0.014 moles * 6 moles/ 1 mole

= 0.084 moles

Mass of water produced = 0.084 moles * 18 g/mol = 1.5 g of water

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Hi all, if anyone could please help me on this question it would be appreciated, tysm!!

Answers

Answer: 69.92 Celsius

Explanation:

Enthalpy change = mass of water * specific heat * change in temperature

400g water * 4.18 J/g*celsius * 1.5K = 2.508kJ

2508 J/(138.3g*0.38 J/g*celsius) = 47.72 K

So the copper temperature was lowered by 47.72K/C when placed in water, so 22.2+47.72 = 69.92 Celsius

Hope this helps(and is correct)!

Which is a form of atomic reaction?

Answers

Explanation:

atomic reactin is teaction

please helpWhat’s the pH of a solution of ammonia that has a concentration of 0.335 M? The Kb of ammonia is
1.8 × 10–5
. First complete the ICE chart.
HA H3O+ AInitial
Change
Equilibrium
iii. Calculate the pH. Please show all work.

Answers

From the calculation, the pH of the solution is 4.85.

What is the pH?

The pH is defined as the hydrogen ion concentration of the solution. We have the ICE table as;

         HA    +    H2O ⇔     H3O^+    +    A^-

I       0.335                          0                0

C     -x                                  +x              +x

E   0.335 - x                         x                x

Ka = 1 * 10^-14/Kb

Ka = 1 * 10^-14/1.8 × 10^–5

Ka = 5.56 * 10^-10

Ka = [H3O^+] [A^-]/[HA]

But  [H3O^+] = [A^-] = x

5.56 * 10^-10 = x^2/ 0.335 - x

5.56 * 10^-10(0.335 - x ) =  x^2

1.86  * 10^-10 - 5.56 * 10^-10x =  x^2

x^2 + 5.56 * 10^-10x - 1.86  * 10^-10 = 0

x=0.000014 M

Now;

pH = -log 0.000014 M

pH = 4.85

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Which of the following best describes the function of a plant's flowers?
A.
The flowers of a plant transport nutrients from the roots of a plant to the stems.
B.
The flowers of a plant make food for the rest of the plant.
C.
The flowers of a plant attract animals that are important for pollination.
D.
The flowers of a plant absorb water and nutrients from the soil.

Answers

It’s C The flowers of q plant attract animals that are important do pollination

How many moles of of ZnCl2 are in 1.5 L of a 0.2 M solution? Report your answer with one significant figure. Provide your answer below:

Answers

The moles of ZnCl₂ in 1.5 L of the 0.2 M solution is 0.3 moles.

What moles of ZnCl₂  is present in in 1.5 L of a 0.2 M solution?

The moles of ZnCl₂  is present in in 1.5 L of a 0.2 M solution is calculated using the formula below:

moles = molarity x volume

Moles of ZnCl₂ = 1.5 x 0.2

Moles of ZnCl₂ = 0.3 moles

In conclusion, the moles of ZnCl₂ in the given volume of solution is determined from the molarity of the solution and the volume of solution.

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Draw and name the isomers of c4h9NH2

Answers

Answer:

yhnjulllljjghbbjygbnk

Please help!!!

Tysm!! Xxxx

Answers

1) The amount of PbS produced will be 16.27 grams

2: The amount of Fe produced will be 118.72 grams.

Stoichiometric problems

1) The equation is balanced. The mole ratio of lead (II) acetate to the PbS is 1:1.

Mole of 22.11 lead acetate = 22.11/ 325.29 = 0.06797 moles

Equivalent mole of PbS = 0.06797 moles

Mass of PbS = 0.06797 x 239.3 = 16.27 grams

2) from the equation, the mole ratio of Al to Fe is 1:1.

Mole of 57.2 g Al = 57.2/26.98 = 2.12 moles

Equivalent mole of Fe = 2.12 moles

Mass of Fe = 2.12 x 56 = 118.72 grams.

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Consider the following reaction:

2KI (aq) + Pb(NO3)2(aq) -> 2 KNO3(aq) + Pbl2(s)

What minimum volume of 0.200 M Kl(aq) is required to completely react with 155.0 mL of a 0.112 M Pb(NO3)2 solution?

A. 174 mL
B. 43.4 mL
C. 86.8 mL
D. 348 mL

Answers

Answer:

B. 43.40 mL

Explanation:

We are required to determine the volume of 0.200 M Kl(aq).

We have; 155.0 mL of a 0.112 M Pb(NO3)2 solution.

We know that molarity of a solution is contained in 1 L or 1000 mL or 1000 cm³.

Hence,

0.112 M Pb(NO3)2 is contained in 1000 mLx mol Pb(NO3)2 is contained in 155.0 mL

[tex]x \: mol \: = \frac{155 \times 0.112}{1000} \\ = 0.01736 \: moles[/tex]

= 0.01736 moles of Pb(NO3)2

We have a mole ratio of 2: 1 (KI : Pb(NO3)2).

To obtain the number of moles of KI; we divide by half the moles of Pb(NO3)2 (aq);

(0.01736)/2

= 0.00868 moles KI

0.20 moles KI is contained in 1000 mL

0.00868 moles KI is contained in x mL

[tex]x \: ml \: = \frac{0.00868 \times 1000}{0.20} [/tex]

= 43.40 mL

Therefore the volume of KI required to react completely with 0.112 M Pb(NO3)2 is 43.40 mL

Tin is used to coat tin cans for food storage. If the tin is scratched and the iron of the can exposed, will the iron corrode more rapidly or less rapidly? Explain

Answers

The scratched tin can with the iron will more rapidly corrode the iron than the tin.

What is corrosion?

The corrosion can be given as the process of the oxidation of the metal into the more stable metal oxide. The chemical oxidation of the metal is attained with the surrounding available oxygen or the water vapors.

The reactivity of the Iron for the oxidation is more as compared to the tin from the reactivity series. Therefore if both tin and iron are exposed to corrosion, iron will be more rapidly corroded.

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For the decomposition of nitrosyl bromide at 10 °C
2 NOBr(g)2 NO(g) + Br2(g)
the average rate of disappearance of NOBr over the time period from t = 0 s to t = 25.7 s is found to be 7.36×10-4 M s-1.

What is the average rate of appearance of Br2 over the same time period?

M s-1.

Answers

From the calculation, the rate of appearance of Br2 is 1.472 * 10^-3 M s-1

What is the rate of reaction?

The rate of reaction refers to how fast or slow that reactants disappear or the products are  formed .

Now;

We know that;

-d[NOBr]/dt = 1/2 d[Br2]/dt

Hence;

d[Br2]/dt = 2[-d[NOBr]/dt ]

d[Br2]/dt = 2 (7.36×10-4 M s-1)

d[Br2]/dt =  1.472 * 10^-3 M s-1

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Hierarchies and schemes are important for?

Answers

Answer:

Hierarchies and schemes are important for organizing information. They provide a way to group related information together and to see the relationships between different pieces of information.

Which statements about this area are true based on what you know about petrified fossils? Check all that apply.

The area was once a forest.
The area was uplifted.
The area was void of organic material.
The area was probably covered by water.
The area was covered by volcanic material.

Answers

On the basis of the area and petrified fossils, the following statements are true:

The area was once a forest.The area was probably covered by water.

Thus, the correct options are A and D.

What are Petrified fossils?

Petrified fossils may be defined as those which completely replace the organic form of fossils with mineral forms like stone.

The area was once a forest indicating that there must be a lot of death of organisms that are buried deep into the soil for millions of years.

This area also consists of a huge amount of water for the delocalization of dead organic matter to flow throughout the given area where the organic form is converted into mineral form.

Therefore, the correct options for this question are A and D.

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Which of the following is true of an effective scientific model

Answers

An effective scientific model must be testable and verifiable by using the scientific method.

What is a scientific model?

A scientific model is any explanation of an observation of the real world that can be proved by the scientific method.

A scientific model must be testable, which means that we can confirm or reject its assumptions through experimental and/or observational procedures.

In conclusion, the effective scientific model must be proved with the scientific method.

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Endler's Guppies Experiment on Natural Selection
1. Identify the following elements of hypothesis-based science in this example: (a) question, (b) hypothesis, (c) prediction, (d) control group, and (e) experimental group. 2. (a) Explain how the types of data the researchers chose to collect enabled them to test their prediction. (b) What additional questions might you ask to determine the strength of these conclusions?

Answers

In conclusion, an experiment about Natural Selection includes mechanisms, explanation, estimation of the frequency of the trait and comparisons.

What is the scientific method?

The scientific method is a series of step used to validate evidence and thus formulate theories.

Darwin used the scientific method to draw conclusions about the main mechanism of evolution, i.e., natural selection.

The scientific method involves making a question, providing an explanation of the hypothesis, making observations/experiments (which include experimental and control groups), and drawing conclusions.

The empirical data serve to test a hypothesis (either confirm or reject it) by contrasting its results with predictive outcomes.

The strength of the conclusions can be enhanced by using supporting evidence from other research fields (in this case, for example, the fossil record).

In conclusion, an experiment on Natural Selection includes mechanisms (question), explanation (hypothesis), estimation of the frequency of the trait in the population (prediction) and comparisons (control group).

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In the above reaction, how many moles of nitrogen gas can theoretically be produced by 2.177 moles of N2H4, assuming there is an excess of N2O4?

Answers

The number of moles of nitrogen that can be produced theoretically will be 3.2655 moles.

Stoichiometric problem

The equation of the reaction is as follows:

[tex]2N_2H_4 + N_2O_4 --- > 3N_2 + 4H_2O[/tex]

The mole ratio of [tex]N_2H_4[/tex] reacted to that of [tex]N_2[/tex] produced is 2:3.

Thus, with 2.177 moles of  [tex]N_2H_4[/tex] , the theoretical number of moles of [tex]N_2[/tex] can be calaculated as:

                         3/2 x 2.177 = 3.2655 moles

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I need to answer this one quick

Answers

Answer:

Electrochemical

Combustion

Photosynthesis

Respiration

Explanation:

Answer:

Electrochemical

Combustion

Photosynthesis

Respiration

You drink part of your bottle of water, leaving 160 g in the bottle. When you purchased the water, it had a temperature of 10oC. After carrying the bottle around for awhile, you take a sip and find that the water is an unpleasantly warm 35oC. How much heat energy did the water left in the bottle absorb? Water has a specific heat capacity of 4.2 J/(g * oC).

Answers

The energy that the water in the  bottle absorbed is obtained as 16800 J.

What is the specific heat capacity?

The specific heat capacity of the water refers to the energy that is required to raise the temperature of 1Kg of the water by 1 degree.

Now we have the following;

mass (m) =  160 g

temperature change dT = ( 35oC -  10oC)

specific heat capacity (c)= 4.2 J/(g * oC).

Now;

H = mcdT

H =  160 g * 4.2 J/(g * oC) *  ( 35oC -  10oC)

H = 16800 J

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At what temperature does sulfur tetrafluoride have a density of 0.260 g/L at 0.0721 atm?

Answers

At 365 K temperature sulfur tetrafluoride have a density of 0.260 g/L at 0.0721 atm.

What is an ideal gas equation?

The ideal gas law (PV = nRT) relates the macroscopic properties of ideal gases. An ideal gas is a gas in which the particles (a) do not attract or repel one another and (b) take up no space (have no volume).

First, calculate the moles of the gas using the gas law,

PV=nRT, where n is the moles and R is the gas constant. Then divide

the given mass by the number of moles to get molar mass.

Given data:

P= 0.0721 atm

[tex]n=\frac{mass}{molar \;mass}[/tex]

[tex]R= 0.082057338 \;L \;atm \;K^{-1}mol^{-1}[/tex]

T=?

Putting value in the given equation:

[tex]\frac{PV}{RT}=n[/tex]

[tex]density = \frac{2 \;atm\; X molar\; mass}{0.082057338 \;L \;atm \;K^{-1}mol^{-1} X T}[/tex]

[tex]0.260 g/L = \frac{0.0721 \;atm\; X 108.07 g/mol}{0.082057338 \;L \;atm \;K^{-1}mol^{-1} X T}[/tex]

T =  365.2158727 K= 365 K

Hence , at 365 K temperature sulfur tetrafluoride have a density of 0.260 g/L at 0.0721 atm.

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Skunks have scent glands that allow the animals to give off an unpleasant odor when they are frightened or uncomfortable.

What function do the scent glands have?
A.
They act as a propulsion system to propel the skunk away from predators.

B.
They attract other skunks to mate with.

C.
They protect skunks against predators.

D.
They kill insects and small animals for the skunks to eat.

Answers

Answer:

Some use them to mark their territory, while others use them as skunks do — as a defense mechanism to protect them from predators. Some animals are even named for their odor-producing ability.29 Mar 2021

Explanation:

Skunks have two glands, one on each side of the anus. These glands produce the skunk's spray, which is a mixture of sulfur-containing chemicals such as thiols (traditionally called mercaptans), which have an offensive odor. The thiols also make their spray highly flammable.

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