The rate constant for the first-order decomposition of C4H8 at 500oC is 9.2 x 10-3 s-1. How long will it take for 10.0% of a 0.100 M sample of C4H8 to decompose at 500oC

Answers

Answer 1

To calculate the time it will take for 10.0% of a 0.100 M sample of C4H8 to decompose at 500oC, we can use the first-order rate equation:

ln([C4H8]t/[C4H8]0) = -kt

where [C4H8]t is the concentration of C4H8 at time t, [C4H8]0 is the initial concentration, k is the rate constant, and t is the time.

Rearranging this equation, we get:

t = (ln([C4H8]0/[C4H8]t))/k

We know that k = 9.2 x 10-3 s-1, and we want to find the time it takes for 10.0% of the sample to decompose, which means [C4H8]t = 0.100 M x 0.10 = 0.010 M. Therefore, we can plug in these values and solve for t:

t = (ln(0.100/0.010))/9.2 x 10-3 s-1

t = 6.4 x 103 s

Therefore, it will take approximately 6.4 x 103 seconds, or 1.8 hours, for 10.0% of the sample to decompose at 500oC.

Related Questions

How does dormancy most likely help a plant survive?
A.It helps a plant grow taller.
B.It helps a plant absorb sunlight.
C.It helps a plant conserve energy.
D.It helps a plant camouflage itself.

Answers

Answer:

C. It helps a plant conserve energy.

Explanation:

Dormancy is a time in a plants life that it stops all physical growth, therefore conserving energy.

Hope this helps.

A desk measures 42 inches long. How many meters is that?

Answers

Answer:1.067

Explanation:

look it up

The answer to 42inches as meters is 1.07 meters

I'm having trouble with this one

Answers

Answer:

1) 7 moles

2) 82.4 grams approximately

If the free energy change delta G for a reaction is -46.11 kJ/mol, the reaction is:A) at equilibrium.B) endergonic.C) endothermic.D) exergonic.E) exothermic.

Answers

The reaction is exergonic. that is the free energy change delta G for a reaction is -46.11 kJ/mol, the reaction is exergonic.

Chemical thermodynamics, exergonic reactions are chemical reactions in which the change in free energy is negative (there is a net release of free energy).

This shows the spontaneous reaction when the system is closed and the initial and final temperatures are the same.

Reactions can be endergonic or exergonic. Endergonic reactions require heat or energy input. The exergonic reaction is the opposite. it gives off heat. Answer and Explanation:

Reactions with negative values of G are exergonic, meaning they release heat.

Answers

Answer:

Crushing or grinding increases the surface area of the salt that is exposed to the molecules of water. Stirring increases the speed at which the particles of salt come in contact with the water molecules.

What law states that matter cannot be created nor
destroyed, even in a chemical reaction?
A
Newton's Laws of Motion
B
Law of Conservation of Mass

Answers

Answer:

I believe it would be Law of conservation of mass (sorry if I'm incorrect)

why helium is inactive

Answers

Question :-

why helium is inactive

Answer:-

Outer shell of the He (1s) is completely filled with the 2 electrons He has very low intermolecular forces so it donot get liquefied even Due to complete duplet it has stable configuration so it doesn't required to react with another atoms to attain stabilityDue to high stability it is also placed among noble gases which are also called inert gases

Explain the relationships among eons, eras, epochs, and periods of the geologic time scale

Answers

The largest time span of the geologic time scale is the eon. It is an indefinitely long period of time that contains at least two eras. Geologic time is divided into two eons. The more ancient eon is called the Precambrian, and the more recent is the Phanerozoic. Each eon is subdivided into smaller spans called eras. The Precambrian eon is divided from most ancient into the Hadean era, Archean era, and Proterozoic era.

The relationship between them is that they are all times in the geologic scale but have different spans.

The Eons is regarded as the largest unit of time in this scale. The Eon is

divided into smaller part known as Era. The Era is a unit of time which is

shorter than Eon.

Eras is further divided into periods. The period is a unit of time which is

smaller than the era. The Periods are then subdivided into even smaller

time spans known as epochs. This simply means in the periods of geologic

time scale, the eons is the largest time scale and the epoch is the lowest

time scale. The order is shown below

Eons > Era > Period > Epoch

Earlier in the lesson, you determined that the enthalphy for magnesium combustion could be computed using Hess’s law. The formula derived from the reaction equations was:

Delta H shown in orange equals delta H 1 in green minus delta H 2 in purple plus delta h 3 in blue.

The enthalpy of the magnesium combustion is
kJ/mol.

Answers

Answer:

-655 kj/mol

Explanation:

Answer:

look at pic

Explanation:

.kjkj;lkm'

Earlier in the lesson, you determined that the enthalphy for magnesium combustion could be computed using

which one of the following is not element ?
a) diamond
b) ozone
c) silica
d) graphite

Answers

Silica is not an element. It is a compound made up of both silicon and oxygen.

Which one of the following statements regarding Kw is false?
A) Kw is know as the ion product of water
B) The value of Kw is always 1.0 x 10-14
C) Kw changes with temperature
D) pKw is 14.00 at 25 deg C
E) The value of Kw shows that water can behave as a weak acid

Answers

B) The value of Kw is always 1.0 x 10-14 is false.

Temperature affects the value of Kw, also referred to as the ion product of water.

its value is approximately 1.0 × 10^-14. The value of Kw decreases as temperature increases and vice versa. Hence, statement B) The value of Kw is always 1.0 x 10^-14 is incorrect.

The concentration of hydrogen ions (H+) and hydroxide ions (OH-) in pure water at a specific temperature and pressure is represented by the thermodynamic constant Kw. Kw is a crucial factor in determining whether a solution is basic or acidic, and its value is used to compute a solution's pH. The value of Kw gives us a foundation for understanding acid-base equilibria as well as the equilibrium between H+ and OH- ions in water. The temperature-dependent and temperature-variable value of Kw can be used to calculate the pH of a solution at a given temperature.

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A reaction occurs that results in more products than reactants. What type of reaction is
'this?

Answers

Answer:

Endothermic reaction

Explanation:

Endothermic means that energy is absorbed leading to more product.

The reaction in which the products can return back to reactants is called reversible reaction. The reaction where more products are formed is called endothermic reaction where the products are more stable.

What is endothermic reaction?

An endothermic reaction is a reaction where, the reactants absorbs heat energy and to produce new products. The term for heat absorption is called endothermic. Whereas the reaction in which heat is evolved is called an exothermic reaction.

In endothermic reaction, reactants gains thermal energy to overcome the energy barrier for the reaction. Therefore the activation energy for products will also be lower indicates their stability.

The enthalpy change that the change in heat absorbed for the endothermic reaction will be positive that is ΔHrxn is +ve. Endothermic phase change involves an increase in entropy. Hence, the reaction that result in more products than reactants is endothermic.

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Kevin has learned about planarians, which are a species of flatworm. Some of these worms have two methods of reproduction. A planarian can produce new offspring by splitting itself and growing new body parts on each portion. Or it can mate with another planarian to produce offspring. Kevin believes that both methods of reproduction will produce offspring that are genetically identical to the parent. Do you agree? Explain your answer.

Answers

In planarian reproduce by tearing themselves into two pieces by a process called 'binary fission'

Planarians also use this extraordinary regenerative ability to reproduce asexually and through the process of transverse fissioning, planarians anchor their tails and essentially pull themselves apart and resulting in two fragments one head and one tail that will regenerate into two genetically identical worms

Planarian has two type of reproduction sexual or asexual reproduction and in a sexual reproduction the process called binary fission and also called budding and in this process flatworm splits off a part of its body and allowing the separated portion to regenerate into a new worm

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[Cl2] is constant while [NO] doubles. The rate quadruples how do I rewrite the rate law with an approximate exponent on the [NO].

Answers

The rate law is written as;

Rate = [Cl]^0 [NO] ^2

How to write the rate law?

We know that the rate law does determine the way that the reaction goes. In effect we know that the rate law is written based on the concentration of the reactants.

The rate law of the reaction must be empirical. We can't know that rate law unless we do vary the concentrations of the reactants in the system and make the necessary adjustment to see the observed rate law.

We are told that [Cl2] is constant while [NO] doubles so we write;

Rate = [Cl]^0 [NO] ^2

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The ion channel that opens in response to acetylcholine is an example of a _____ signal transduction system.

Answers

The ion channel that opens in response to acetylcholine is an example of a ligand-gated ion channel, which is a type of direct or membrane signal transduction system.

In this system, the neurotransmitter acetylcholine acts as the ligand that binds to the receptor site on the ion channel, causing it to open and allow the flow of ions across the cell membrane.

This rapid change in ion concentration can trigger a range of cellular responses, such as muscle contraction or nerve impulse transmission.

Ligand-gated ion channels are distinct from other types of signal transduction systems, such as G protein-coupled receptors and enzyme-linked receptors, which rely on intracellular signaling pathways to mediate the response to ligand binding.

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Ozone in the upper atmosphere (the ozone layer) absorbs light at around 220 nm. what is the frequency???

Answers

Answer:

1.36x10^15 Hertz

Explanation:

The wavelength, λ, and frequency, ν, of light are described by the equation:

c = λν

where c is the speed of light (c = 3.0x10^8 m/s)

We are given the wavelength, λ, as 220nm

We'll need this in meters, not nanometers, nm.

1nm = 10^-9m

(220nm)*(10^-9m/nm) = 2.20x10^-7m

v = c/λ

v = (3.0x10^8 m/s)/(2.20x10^-7m) = 1.36x10^15/s or Hertz (1360 terahertz)

Part of Newtons first law states an object at rest stays at rest unless acted upon by an unbalanced force. Which one is NOT an example of this law?

Answers

Solution :

Sir Isaac Newton was a great scientist. The discoveries of the Newton change the way we see the world. Newton gave us the fundamental principles through which the entire universe is governed.

Newtons 1st law of motion states that a body moves or stays in position until and unless an external force is applied to the body.

This is the law of nature.

An example which do not support this law can be a body having a huge mass and a small boy applies force to move it but is unable to move the body.

Which property of water makes it a good choice for use in heat exchangers? Choose the correct answer.

A)high entropy

B)low entropy

C)low specific heat

D)high specific heat

Answers

Answer:

The correct answer is D)high specific heat

Explanation:

The specific heat indicates the amount of heat required to raise the temperature of a substance in 1 unit of temperature. The specific heat of water is around 4.18 J/g.°C. That means that 1 gram of water is able to retain a high amount of heat (4.18 J) when the temperature is raised to 1°C. Compared with other substances, this specific heat capacity is higher. Thus, water is a good choice for use in a heat exchanger.

The chemical formula for the ionic compound aluminum sulfite is Al2(SO3)3. Explain why there are 2 cations for every 3 anions in this compound.

Please help lol

Answers

Answer: It is a 2:3 ratio because Al has a +2 charge and S and O both have a -2 charge. It takes 2 Al to bring 3 SO3 to a neutral state.

Explanation:

After severe dust storms in the 1930s, practices were put in place to reduce soil erosion. Which
practice best helped to reduce soil erosion?

Answers

Answer:

keep the soil wet

Explanation: if the song wet it will not cause as much dust storms

The final digit in a measurement is obtained by estimating between the smallestmarked lines.a) Trueb) False

Answers

Answer:

$A:\text{ True}$

Explanation:

Here, we want to get how the final digit in a measurement is obtained

Mathematically, the final digit can be obtained by estimation

Hence, we say that the value is uncertain

The final digit is obtained by a mark or between the last mark and the next mark in a measurement

Thus, we call this value uncertain since it is estimated

What is the mass of 2409793.03 particles of N2?

Answers

ANSWER

ANSWER

EVIDENCE

defintion of producer

Answers

Answer:

a producer is an organisms that produce food for themselves and other organisms.

A producer is any biotic organism that makes its own food. Consumers often latch off of the resources provided by producers. An example of a producer would be algae; it makes its own food and tertiary consumers feed off of it.

What does the little ‘2’ in 2O2 mean?

Answers

Answer:200

Explanation:

it means 2 oxygen atoms in the molecule

materials generally become warmer when light is reflected by them. absorbed by them. transmitted by them. all of these none of these

Answers

Materials generally become warmer when they are "absorbed" by light, this statement is more detailed. So, the correct answer is "absorbed by them."

Explanation: When a material absorbs light, it receives energy from the light, which leads to an increase in temperature. When light is absorbed by a material, the energy of the light is transformed into internal energy in the material. The temperature of a material can increase as a result of this energy absorption.

This is due to the fact that the increased internal energy of the molecules in the material causes them to vibrate more quickly and hence results in a temperature rise.

The light reflects or transmits when it passes through the material. When light reflects off a surface, it bounces back in the opposite direction. Transmitted light travels through a material without being absorbed by it.

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OSHA noted a violation of safety standards for chemical use in a film development laboratory. The laboratory was given 6 months to correct the problem. When the deadline arrived, the laboratory was still in violation of the standards. This is a ______ violation.

Answers

When the deadline arrived, the laboratory was still in violation of the standards. This situation describes a "continued" violation.

OSHA identified a safety issue in the film development laboratory and provided a deadline to correct it. Since the laboratory did not address the problem within the given timeframe, it remains in violation of the standards, resulting in a continued violation.

OSHA (Occupational Safety and Health Administration) is a government agency responsible for ensuring safe and healthy working conditions for employees in the United States. As part of their duties, OSHA conducts regular inspections of workplaces to identify any safety hazards or violations of their standards.

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Hi give me 1 example Of kinetic energy

Answers

Answer:

A river flowing at a certain speed comprises kinetic energy as water has certain velocity and mass

Explanation:

Answer: A river flowing at a certain speed or a moving car

Explanation:

I Need Help!!!

Let's say one of our bicycles tires has a volume of 30.0 Liters at 300 K. What will happen if
we double the volume?

Answers

Answer:

I think that temperature will be cut in half.

When volume increases, pressure decreases. As pressure decreases, temperature decreases. So if you double volume, pressure is halved and so will the temperature. I'm new to this, but I think that's the answer . Tell me if I'm right good luck!

What does one mole of h20 correspond to

Answers

Answer:

One mole of H2O corresponds to 18 g .

HNO3 + H2SO4 + NO
You now have these half-reaction equations:
3e + HNO3 → NO
S→ H2SO4 + 6e
Which factor will you use for the top equation?
Which factor will you use for the bottom equation?

Answers

Explanation:

The two half equations are;

3e + HNO3 → NO

S→ H2SO4 + 6e

When balancing half equations, we have to make sure the number of electrons gained is equal to the number of electrons lost.

Which factor will you use for the top equation?

We multiply by 2 to make the number of electrons = 6e

Which factor will you use for the bottom equation?

We multiply by 1 to make the number of electrons = 6e

Answer:

Explanation:

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