Consider the following balanced thermochemical equation for a reaction sometimes used for
H2S production:
1/8 S8 (s) + H2 (g) ¨ H2S (g) ƒ¢Hrxn = -20.2 kJ
(a)Is this an exothermic or endothermic reaction?
(b)What is ĢHrxn for the reverse reaction?
(c)What is ĢH when 3.9 mol of S8 react?
Answers
a)ΔH is negative the reaction is exothermic and b) It would require +20.2kJ (ie you put it in) per mole of H2S to produce 1/8 S8 and H2 c)the stoichiometric relationships were maintained.
What does a thermochemical equation represent?Thermochemical equations are chemically balanced equations that take into account both the energy shift and the physical conditions of all reactants and products. Energy is a component in an endothermic reaction, but it is a result in an exothermic reaction.
1/8 S₈ (s) + H₂ (g) → H₂S (g)
ΔHrxn = -20.2 kJ
(a)The process is exothermic because H is negative.
(b) 1/8 S8 and H2 would require +20.2kJ (you put it in) per mole of H2S.
(c) In either case, assuming the stoichiometric relationships were maintained (ie H2 was also increased by a factor 3.9) then the enthalpy change would be multiplied by 3.9.
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Related Questions
4 - A wave equation is given as y = 0.1 sin(0.01x + 5000t), calculate the following (a) The wavelength and the wave number k (b) The frequency f and the angular frequency w (c) The amplitude A, the velocity v and its direction. 5 - A 1 m long piano string of mass 10g is under a tension of 511N. Find the speed with which a wave travels on this string.
Answers
In question 4, the wave equation y = 0.1 sin(0.01x + 5000t) is given, and calculations are required to determine the wavelength, wave number, frequency, angular frequency, amplitude, velocity, and its direction. In question 5, a piano string with a length of 1 m and a mass of 10 g under a tension of 511 N is considered, and the task is to find the speed at which a wave travels on this string.
In question 4, to determine the wavelength and wave number, we can compare the equation y = 0.1 sin(0.01x + 5000t) to the standard wave equation y = A sin(kx - wt). By comparing the coefficients, we can see that the wavelength (λ) is given by λ = 2π/k, where k is the wave number. The frequency (f) is related to the angular frequency (ω) as f = ω/2π. The amplitude (A) is 0.1 in this case. The velocity (v) of the wave is given by v = ω/k, and its direction can be determined from the sign of the wave number (positive for waves traveling to the right, negative for waves traveling to the left).
In question 5, the speed of a wave traveling on a string can be found using the equation v = √(T/μ), where T is the tension in the string and μ is the linear mass density (mass per unit length) of the string. The linear mass density (μ) is calculated as the mass of the string (10 g) divided by its length (1 m). Once the linear mass density is determined, we can substitute it along with the tension (511 N) into the equation to calculate the speed (v) at which the wave travels on the string.
By performing the necessary calculations for each question, we can obtain the specific values for the wavelength, wave number, frequency, angular frequency, amplitude, velocity, and direction in question 4, and the speed of the wave on the piano string in question 5.
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A. It Implies That M Is Finitely Generated. B. It Implies That M Has Nonzero Elements Of Nonzero Order. C. When Every Non-Null Element Has Null . D. In The Case That The Ring R Is A Body. E. None Of The Above Alternatives Gives A
Which of the following alternatives give a true statement. Justify your answer.
A modulus M over a ring R has a finite basis:
a. It implies that M is finitely generated.
b. It implies that M has nonzero elements of nonzero order.
C. When every non-null element has null .
d. in the case that the ring R is a body.
e. None of the above alternatives gives a true statement.
Which of the following statements are true?
a. If a subset of a module generates that whole module, then the subset cannot be
empty.
b. Every submodule S of a module M verifies the inequality C. Two different subsets of M have to generate two different submodules of M.
d. If S generates a submodule N of the module M, then contains S.
e. Neither statement is true.
Answers
The correct answer is e. None of the above alternatives gives a true statement. None of the statements in options a, b, c, and d are true when it comes to a modulus M over a ring R having a finite basis.
When a modulus M can be formed entirely from a finite set of elements, the modulus M is said to be finitely generated. M's finite basis does not, however, automatically imply that M is finitely generated. A basis is a set of linearly independent elements, and it might not be enough to produce all of the components of the modulus.
According to the assertion in option b, M must include nonzero items of nonzero order if it has a finite basis. This is untrue, though. The smallest positive number k, such that the element raised to the power of k equals the identity element, is referred to as the order of an element.
According to option c, every non-null element in a modulus with a finite basis has a null. Nevertheless, this claim is likewise untrue. It is possible for a modulus with a finite basis to have non-null elements without a null element.
According to option d, a ring R is a body, or a field, and only then can a modulus have a finite basis. However, this assertion is also untrue. Even though the ring R is not a field, a modulus can nonetheless have a finite basis. None of the given alternatives provides a true statement about a modulus M over a ring R having a finite basis.
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David is 60 years old, has moderate financial health, a short time horizon, and a low risk tolerance.
Answers
David's investment strategy should reflect his financial goals, time horizon, and risk tolerance.
David is a 60-year-old individual with moderate financial health, meaning he has a stable financial situation but may have some debt or other financial obligations. He has a short time horizon, which suggests he may need his funds in the near future for retirement or other expenses.
He has a low risk tolerance, indicating that he is unwilling to take significant risks with his investments and may prefer safer, more conservative options. Based on these factors, David may want to consider investments that prioritize capital preservation, such as bonds or fixed-income securities. He may also want to work with a financial advisor to create a diversified portfolio that balances his need for stability with potential returns.
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Roger is a forensic investigator. His examination of a dead body reveals that the body is completely limp. Which state is the body in?
A. Rigor Morris
B. Algor Morris
C. Pallor Morris
D. Primary Flaccidity
Answers
The dead body is in a completely limp state. This corresponds to option D. Primary Flaccidity.
When a person dies, their muscles lose their ability to contract and maintain tension. This loss of muscle tone is referred to as flaccidity.
Primary flaccidity occurs immediately after death and is characterized by a complete lack of muscle tone and resistance to external forces. The body becomes limp and unresponsive to stimuli.
During primary flaccidity, the muscles lose their ability to maintain their usual length and tension due to the absence of nerve impulses and energy production. As a result, the limbs and other body parts hang loosely without any sign of rigidity or stiffness.
It's important to note that primary flaccidity is an early stage of the postmortem process, which is the series of changes that occur in the body after death.
Over time, secondary changes may occur, such as rigor mortis (muscular stiffening), as the body undergoes further decomposition processes.
In summary, when a dead body is in a completely limp state without any muscular rigidity or resistance, it corresponds to primary flaccidity.
This condition occurs immediately after death and is characterized by the loss of muscle tone and the inability of the muscles to maintain their usual length and tension.
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A ball with a negative initial velocity slows down as it rolls down on a straight path is the ball’s acceleration positive or negative?
Answers
Answer:
positive acceleration.
Explanation:
As its slowing down gradually, its positive acceleration. When the ball slows down, its acceleration vector is in the opposite direction of its motion. Therefore positive acceleration.
n which order did the events forming our solar system occur?
The solar nebula became hot and dense pulling in more gas.This flattened into a rotating disk. It spun faster and faster, forming the Sun.
Gas was pulled toward the center, forming the Sun. Gas flattened into a rotating disk and became hot and dense, forming a solar nebula that spun faster and faster.
Gas flattened into a rotating disk and became hot and dense, forming a solar nebula that spun faster and faster. Gas was pulled toward the center, forming the Sun.
The solar nebula spun faster and faster and flattened into a rotating disk. Most of the gas was pulled toward the center, where it became hot and dense, forming the Sun.
Answers
Answer:
The solar nebula became hot and dense because of that it pulling in more gas. This flattened into a rotating disk. It spun faster and faster, forming the Sun.
Explanation:
hope this helps
The solar nebula became hot and dense because of that it pulling in more gas. This flattened into a rotating disk. It spun faster and faster, forming the Sun. This order did the events forming our solar system occur.
What is Solar nebula ?In the so-called nebular hypothesis of the genesis of the solar system, the Sun and planets originated by condensation from a gaseous cloud. In 1734, Swedish philosopher Emanuel Swedenborg claimed that the planets arose from a nebular crust that enveloped the Sun before breaking apart. Immanuel Kant, a German philosopher, proposed in 1755 that the Sun and planets were created by a slow rotating nebula that was eventually pushed together by its own gravitational force and flattened into a spinning disc. In 1796, the French astronomer and mathematician Pierre-Simon Laplace presented a similar concept, but with the planets forming before the Sun. The Kant-Laplace theories were criticised by the British physicist James Clerk in the late nineteenth century.
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3. What gases compose the lower atmosphere, and what are examples of variable gases?
4. How does the atmosphere change in properties of air pressure and temperature with rise or fall in altitude, and what rates are useful to estimate how much change occurs with altitude in the Troposphere layer?
Answers
The lower atmosphere is primarily composed of nitrogen and oxygen (about 21%). Variable gases present in smaller amounts include carbon dioxide, water vapor, methane, ozone, and trace amounts of other gases.
The lower atmosphere, also known as the troposphere, is the layer closest to the Earth's surface. It is primarily composed of nitrogen, accounting for approximately 78% of the gases present, and oxygen, which makes up about 21%. These two gases are considered the main components of the lower atmosphere.
In addition to nitrogen and oxygen, there are variable gases present in smaller amounts. One example is carbon dioxide (CO2), which plays a crucial role in the Earth's climate system as a greenhouse gas. Another variable gas is water vapor (H2O), which can vary in concentration depending on the humidity of the air. Water vapor is an important component for the Earth's weather patterns and can influence temperature and precipitation.
Other variable gases include methane (CH4), which is another greenhouse gas with a significant impact on climate change; ozone (O3), which is found in the upper troposphere and stratosphere and plays a crucial role in absorbing ultraviolet radiation from the Sun; and trace amounts of other gases such as noble gases (argon, neon, helium, etc.) and pollutants like sulfur dioxide (SO2), nitrogen oxides (NOx), and volatile organic compounds (VOCs).
The properties of air pressure and temperature change with altitude in the troposphere. Air pressure refers to the force exerted by the weight of the air molecules above a given point. As altitude increases, the density of air decreases, leading to lower air pressure. Temperature, on the other hand, generally decreases with an increase in altitude in the troposphere.
The rate at which the temperature changes with altitude is called the lapse rate. On average, the lapse rate in the troposphere is about 6.5 degrees Celsius per kilometer (3.6 degrees Fahrenheit per 1,000 feet). This means that for every kilometer you ascend in the troposphere, the temperature decreases by approximately 6.5 degrees Celsius. However, it's important to note that the actual lapse rate can vary depending on various factors such as weather conditions, geography, and time of day.
Estimating changes in air pressure with altitude can be done using the barometric formula, which takes into account the decrease in air density as altitude increases. However, it's worth mentioning that air pressure can also be influenced by weather patterns, temperature variations, and local geography.
In summary, the lower atmosphere is primarily composed of nitrogen and oxygen, with variable gases such as carbon dioxide, water vapor, methane, ozone, and trace amounts of other gases. As altitude increases in the troposphere, air pressure decreases, while temperature generally decreases at a rate of approximately 6.5 degrees Celsius per kilometer.
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the magnetometer will measure the total magnetic field. which of the components should be zero when the dipole is oriented along the y-axis, based on what you learned in the previous lab about the direction of magnetic field lines due to a dipole magnet?
Answers
The component of the magnetic field along the y-axis should be zero when the dipole is oriented along the y-axis.
This is because the magnetic field lines of a dipole magnet are perpendicular to the axis of the magnet. When the dipole is oriented along the y-axis, the axis of the dipole is also along the y-axis. Therefore, the magnetic field lines of the dipole are oriented in the x-z plane and are perpendicular to the y-axis. As a result, the component of the magnetic field along the y-axis is zero.
In contrast, when the dipole is oriented along the x-axis, the axis of the dipole is parallel to the x-axis, and the magnetic field lines of the dipole are perpendicular to the x-axis. Therefore, the component of the magnetic field along the x-axis is zero. Similarly, when the dipole is oriented along the z-axis, the axis of the dipole is parallel to the z-axis, and the magnetic field lines of the dipole are perpendicular to the z-axis. Therefore, the component of the magnetic field along the z-axis is zero.
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can someone please help me A wave’s velocity is 120 m/sec with a frequency of 6 Hz. What is its wavelength?
Answers
Answer:
by using formula,
wavelength= velocity/frequency
= 120/6
= 20 meter
Ans: 20 meter
Answer:
wavelength= velocity
= 120/6= 20 meter
Explanation:
Two rams run toward each other. One ram has a mass of 49 kg and runs west
with a speed of 7 m/s, while the other has a mass of 52 kg and runs east with
a speed of 9 m/s. What will the momentum of the system made up of the two
rams be after they collide? Assume the total momentum of the system is
conserved
A. 811 kg-m/s west
B. 811 kg-m/s east
C. 125 kg-m/s west
O D. 125 kg-m/s east
S
Answers
Answer: (d)
Explanation:
Given
Mass of the first ram \(m_1=49\ kg\)
The velocity of this ram is \(v_1=-7\ m/s\)
Mass of the second ram \(m_2=52\ kg\)
The velocity of this ram \(v_2=9\ m/s\)
They combined after the collision
Conserving the momentum
\(\Rightarrow m_1v_1+m_2v_2=(m_1+m_2)v\\\Rightarrow 49\times (-7)+52\times (9)=(52+49)v\\\Rightarrow v=\dfrac{125}{101}\ m/s \quad[\text{east}]\)
Momentum after the collision will be
\(\Rightarrow 101\times \dfrac{125}{101}=125\ kg-m/s\ \text{East}\)
Therefore, option (d) is correct
A person ran with a speed of 6 m/s onto the skateboard .What is the speed with which he ride on the skate board
Answers
Answer:
First, remember the conservation of energy.
We can define the kinetic energy as:
K = (1/2)*m*v^2
where m is the mass, and v is the velocity.
The velocity of the person is 6m/s, and the mass is unknown.
Now, when the person rides the skateboard, this kinetic energy must remain constant, if M is the mass of the skateboard, the speed after the person rides ir will be:
K' = (1/2)*(m + M)*v'^2
Where v' is the new velocity.
In this case, we can suppose that the skateboard has really small mass compared with the person.
M < < m
then:
(m + M) ≈ m
then:
K' = (1/2)*m*v'^2 = K = (1/2)*m*v^2
from that equation, we can conclude that:
v' = v
Then if the velocity before riding the skateboard was 6m/s, then after would be also 6m/s.
Define Acceleration.
Ty!
Answers
Answer:
Acceleration is the name we give to any process where the velocity changes. Since velocity is a speed and a direction, there are only two ways for you to accelerate: change your speed or change your direction—or change both.
4. Create two more paths on the Gizmo like the one you created in question #2 above. List the energy conversions that happen along each path. Record your work in the tables below. Energy Path Energy conversion
Answers
Energy Path Energy conversion
Sun- Nuclear energy is converted to light and thermal energy.Sun- Air Radiant energy is converted to thermal energy.Air- Kinetic energy is converted to mechanical energy.Wind Turbines- Toaster Mechanical energy is converted to electrical energy.Toaster- Electrical energy is converted to thermal energy.Finally, the energy conversion begins with the Sun's nuclear energy, which is converted into radiant and thermal energy to heat the air. Wind turbines then convert the mechanical energy of the moving air into electrical energy, which is then transferred through the toaster. The bread is finally heated by converting electrical energy into thermal energy.
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Your question is incomplete, most probably the complete question is:
Create path: Create an energy path in the Gizmo, starting at the Sun. For each step of the path, describe the energy conversion that takes place. The first one is done for you. Discuss your answers with your classmates and teacher.
Energy Path Energy conversion
Sun Nuclear energy is converted to light and thermal energy.
Air Sunlight warms up the surface which warms up the air
Wind Wind turns the blades which creates electricity
Turbines Electricity flows through the toast
Toaster
a car traveling at 15 m/s slams on its brakes and the wheels lock. the car comes to rest after skidding 20 m. determine how far the car would skid if the car had been traveling, instead, at 45 m/s.
Answers
The distance travelled by the car if had been travelling at a speed of 45 m/s is 180 m.
What is the distance travelled by the car?
The distance travelled by the car is calculated by applying the following kinematic equation as shown below.
v² = u² + 2as
where;
v is the final velocity of the car when it stops = 0u is the initial velocity of the car = 15 m/ss is the distance travelled by the car = 20 ma is the acceleration of the car = ?0 = u² + 2as
-2as = u²
a = -(u²)/2s
a = - (15²) / (2 x 20)
a = -5.625 m/s²
The distance travelled by the car if had been travelling at a speed of 45 m/s is calculated as;
v² = u² + 2as
0 = u² + 2as
s = -(u²)/2a
s = -(45²) / (2 x - 5.625)
s = (45²) / (2 x 5.625)
s = 180 m
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Tad drops a cherry pit out the car window 1. 0 m above the
ground while traveling down the road at 18 m/s. How far,
horizontally, from the initial dropping point will the pit hit the
ground?
Answers
The pit, from the initial dropping point, will hit the ground after traveling a horizontal distance of approximately 18.4 meters.
To find the time it takes for the pit to hit the ground, we use the equation that relates the initial vertical velocity, acceleration due to gravity, and displacement. h = (1/2) * g * t^2. Where h is the initial height (1.0 m) and g is the acceleration due to gravity (approximately 9.8 m/s^2). Solving for t, we find: t = sqrt((2 * h) / g). Next, we calculate the horizontal distance using the horizontal velocity and the time. distance = horizontal velocity * time. By substituting the given horizontal velocity of 18 m/s, we get the horizontal distance traveled by the cherry pit from its initial dropping point.
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runnin reggie ran up a mountain from an elevation of 915 m to 4095 m in 62.25 min. If Reggie has a mass of 70 kg, how much power did Reggie generate during his run?
Answers
Answer:
....................
What are two adaptations that telescope must make to account for
different types of light?
Answers
Answer: Reflecting telescopes focus light with a series of mirrors, while refracting telescopes use lenses.
Explanation:
terference is a property of a. light waves. b. sound waves. c. water waves. d. all of these e. none of these
Answers
When two Polaroids' axes are parallel, light cannot flow between them. a 45° angle between them. Parallelc. Perpendiculard. a pair of these. each of these 45.
An entrepreneur suggests providing polarised background music for offices and allowing those who would rather not hear it to do so by using polarising earbuds.Mechanical vibrations in the form of sound waves are transmitted from an item to the ear. These vibrations may arise from a person's voice, a musical instrument, thunder, or an earthquake and can be audible or inaudible. By connecting a pair of headphones to the speakers and turning on the sound, a sound wave can be heard.
Light is electromagnetic radiation, and light is electromagnetic radiation.
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What is the potential energy of a ball that weighs 3kg and is at a height of 3m from the ground?
Answers
Answer:
88.2 J (I put 10kg instead of 3kg last time oops)
Explanation:
https://www.calculatorsoup.com/calculators/physics/gravitational-potential.php
Answer:
\(\boxed {\boxed {\sf 88.2 \ Joules}}\)
Explanation:
Potential energy is energy due to position. It is the product of the object's mass, height, and the gravitational acceleration.
\(E_p= m \times \ g \times h\)
The mass of the ball is 3 kilograms and the height is 3 meters. Assuming this is on Earth, the gravitational acceleration is 9.8 meters per square second.
m= 3 kg g= 9.8 m/s²h=3 mSubstitute these values into the formula.
\(E_p= 3 \ kg \times 9.8 \ m/s^2 \times 3 \ m\)
Multiply the first two numbers.
\(E_p=29.4 \ kg*m/s^2 \times 3 \ m\)
Multiply again.
\(E_p= 88.2 \ kg*m^2/s^2\)
1 kilogram square meter per square second is equal to 1 Joule. Our answer of 88.2 kg*m²/s² is equal to 88.2 Joules\(E_p= 88.2 \ J\)
The ball has 88.2 Joules of potential energy.
Examine Figure 1. During the process of beta decay, which statement correctly compares the parent nucleus and the daughter nucleus?
A
The parent has a different mass number than the daughter.
B
The parent has a different atomic number than the daughter.
C
The parent has the same number of neutrons as the daughter.
D
The parent has the same number of electrons as the daughter.
Answers
Beta decay forms a daughter nucleus with a different atomic number than the parent nucleus. The correct answer is option B.
A nucleus loses an electron when it emits the beta particles. The parent and daughter nuclei share the same atomic mass because the mass of an electron is so much less than that of a proton or neutron. The offspring nucleus has an atomic number that is one higher than the parent nucleus.
There are mainly two types of beta decay: beta plus (positron decay) and beta minus (electron decay). The daughter atomic number reduces by one after beta plus decay (the nucleus loses one positive charge) and rises by one after beta minus decay (the nucleus loses one negative charge).
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you shine a laser that goes from air into a chunk of glass. which electromagnetic wave quantity or quantities are different in the air vs in the glass
Answers
When a laser shines from air into a chunk of glass, there are several electromagnetic wave quantities that are different in the two mediums. One of the most significant differences is the refractive index of the two materials.
In air, the refractive index is close to 1, whereas in glass, it is typically between 1.4 and 1.6. This means that the speed of light is slower in glass than in air, causing the wavelength of the laser to decrease as it enters the glass. Additionally, the polarization of the laser beam may also change as it enters the glass due to the different properties of the two mediums. These differences can have important implications for a wide range of applications, from optical fibers to lenses and prisms.
When a laser passes from air into glass, the main electromagnetic wave quantities that change are the speed, wavelength, and angle of refraction. In glass, the speed of light is slower than in air, which leads to a shorter wavelength. This difference in speed is due to the higher refractive index of glass. Additionally, the angle of refraction changes as the light enters the glass due to Snell's Law, causing the light to bend. However, the frequency of the light remains constant as it transitions between the two mediums.
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which of the following explains why positively charged potassium ions are attracted to the negatively charged interior of a cell?
Answers
The term that is defined as the entire set of surrounding parts of the world with which the user interacts is the user interface (UI).
The user interface encompasses all the elements and components that enable users to interact with a system, device, or application. It includes the visual, auditory, and tactile elements that facilitate communication and interaction between the user and the technology. The UI serves as the bridge between the user and the underlying system, allowing users to input commands, receive feedback, and access the functionality of the system.
The user interface can take various forms, including graphical user interfaces (GUIs), command-line interfaces (CLIs), voice-activated interfaces, touchscreens, and more. It involves the design and arrangement of buttons, menus, icons, text fields, and other interactive elements that enable users to navigate, input data, and perform tasks within the system.
The main purpose of a user interface is to create a user-friendly and intuitive environment that facilitates efficient and effective interaction. It should present information in a clear and organized manner, provide appropriate feedback to user actions, and ensure that users can easily access the desired features and functions of the system.
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When a car goes around a circular curve on a horizontal road at constant speed, what force causes it to follow the circular path?
When a car goes around a circular curve on a horizontal road at constant speed, what force causes it to follow the circular path?
Answers
When a car goes around a circular curve on a horizontal road at a constant speed, the force that causes it to follow the circular path is the centripetal force.
Centripetal force is a force that is directed towards the center of a circular path, and it acts on an object that moves in a circular motion. Centripetal force keeps an object moving in a circular path by continuously changing the direction of the object without changing its speed.
How is the centripetal force created?
The centripetal force can be created by various means, for instance, it can be created by a tension force when an object swings on a rope, a gravitational force that keeps the planets in orbit around the Sun, or a normal force, as in the case of a car on a circular path.
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The magnetic field inside a 5.0-cm-diameter solenoid is 2.0 T and decreasing at 4.50 T/s What is the electric field strength inside the solenoid at a point on the axis?
Answers
We can use Faraday's equation of electromagnetic induction, which states that the induced electric field is equal to the rate of change of the magnetic flux, to determine the strength of the electric field within the solenoid at a point on the axis. To determine the electric field strength, use the following formula:
E = D(BA) / dt
Where:
E is the intensity of the electric field
The magnetic field intensity is B.
A is the region parallel to the magnetic field, and t is the time.
Given:
Diameter of the solenoid = 5.0 cm
Radius of the solenoid (r) = 2.5 cm = 0.025 m
Magnetic field strength (B) = 2.0 T
Rate of change of magnetic field (dB/dt) = -4.50 T/s
To calculate the area (A) perpendicular to the magnetic field, we can use the formula:
A = πr^2
A = π(0.025 m)^2
A = 0.00196 m^2
We can now enter the values into the formula as follows:
E = d(BA)/dt.
E = -(-4.50 T/s)(0.00196 m^2)/s
E = 8.82 V/m
Therefore, the electric field intensity at any point on the axis inside the solenoid is 8.82 V/m.
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if it takes you 20 joules of work to move a couch 10 meters in 10 seconds, what is the power?
Answers
Answer:
Power = 2 j/s
Explanation:
Power = Work / Time
= 20/10
= 2 j/s
Question 8 of 10 What effect does a catalyst have on the energy of a reaction system? A. It increases the initial energy of the reactants. B. It reduces the final energy of the products. C. It reduces the activation energy. D. It has no effect on the energy of a reaction system.
Answers
Answer: It reduces the activation energy.
Explanation:
A catalyst is a material that, without being consumed by the process, speeds up a chemical reaction or decreases the temperature or pressure required to initiate one. The addition of a catalyst to a reaction is known as catalysis.
The bonds holding together the atoms in molecules are ruptured, altered, and repaired during a chemical reaction, recombining the atoms to form new molecules. By decreasing the activation energy, the energy hurdle that must be cleared for a chemical reaction to take place, catalysts improve the efficiency of this process. As a result, catalysts facilitate the formation of chemical bonds between atoms to create novel combinations and new compounds. Chemical processes are accelerated and become more energy-efficient when catalysts are used.
During the rock cycle, cooling magma and lava from igneous rock, heat and pressure cause other rocks to turn into metamorphic rock, and weathered rock on the surface is eventually turned into sedimentary rock. Rocks move through this cycle at different rates, but it can take some rocks several billion years to complete the cycle. Using this information, what is the most likely reason why scientists use models to study the rock cycle?
A. The rock cycle only affects objects that are too small to be observed directly.
B. The rock cycle is only an abstract idea and does not actually occur in nature.
C. The rock cycle no longer occurs on Earth.
D. The rock cycle takes too long to be able to observe it in entirety.
Answers
Answer:
D. The rock cycle takes too long to be able to observe it in entirety.
Explanation: is answer
a 52.0 cmcm -long solenoid 1.35 cmcm in diameter is to produce a field of 0.375 mtmt at its center. part a how much current should the solenoid carry if it has 705 turns of wire?
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The current should the solenoid carry is 0.22A.
We need to know about the magnetic field of solenoids to solve this problem. The magnetic field appears when there is any current flowing through the solenoid. The magnitude of the magnetic field can be determined by
B = μ₀ . I . N / L
where B is the magnetic field, μ₀ is the vacuum permeability (4π x 10¯⁷ H/m), I is current, N is coil turns and L is the length of the solenoid.
From the question above, the parameters given are
L = 52.0 cm = 0.52 m
d = 1.35 cm
R = 0.0135/2 m
B = 0.375 mT = 0.000375 T
N = 705
By substituting the given parameters, we can calculate current
B = μ₀ . I . N / L
0.000375 = 4π x 10¯⁷ . I . 705 / 0.52
I = 0.22 A
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rank these graphs on the basis of the angular velocity of each object. rank positive angular velocities as larger than negative angular velocities.
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The angular velocities of each object are based on the assumption B > C > A=F> D=E.
What is velocity, for instance?Velocity can be defined as the rate that an object moves in a specific direction. as the quickness of a car driving north on a motorway or the pace at which a rocket takes off. Because the velocity vector is scalar, its absolute value magnitude will always equal the motion's speed.
Can velocity go backwards?The increase in position (displacement) of an object over a period of time is referred to as its velocity. Speed can only be positive, whereas velocity can be either favourable or unfavourable because it combines both speed and direction.
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What is the average kinetic energy (temperature) of
sample A
