the energy of a hypothetical x-x bond is 170kj/mol. calculate the minimum wavelength of light required to break the bond
Answers
To calculate the minimum wavelength of light required to break the bond, we need to use the formula:
λ = hc/E = 705 nm
where λ is the wavelength of light, h is Planck's constant (6.626 x 10^-34 J·s), c is the speed of light (2.998 x 10^8 m/s), and E is the energy of the bond (170 kJ/mol).
First, we need to convert the energy per mole to energy per molecule:
170 kJ/mol / (6.022 x 10^23 molecules/mol) = 2.826 x 10^-19 J/molecule
Now we can plug in the values:
λ = (6.626 x 10^-34 J·s x 2.998 x 10^8 m/s) / 2.826 x 10^-19 J/molecule
λ = 7.02 x 10^-7 m
Therefore, the minimum wavelength of light required to break the bond is 7.02 x 10^-7 meters (or 702 nm).
Hi! To calculate the minimum wavelength of light required to break the x-x bond, we can use the equation:
E = hc/λ
where E is the energy of the bond (170 kJ/mol), h is Planck's constant (6.626 x 10^(-34) Js), c is the speed of light (3.0 x 10^8 m/s), and λ is the wavelength.
First, we need to convert the energy from kJ/mol to J/photon by using Avogadro's number (6.022 x 10^23):
E = (170 x 10^3 J/mol) / (6.022 x 10^23 photons/mol) = 2.82 x 10^(-19) J/photon
Now, we can solve for λ:
λ = hc/E = (6.626 x 10^(-34) Js) (3.0 x 10^8 m/s) / (2.82 x 10^(-19) J/photon)
λ ≈ 7.05 x 10^(-7) m or 705 nm
The minimum wavelength of light required to break the x-x bond is approximately 705 nm.
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Related Questions
find the odd one out and explain the reason why ? sand , sugar , salt , baking soda
Answers
Answer: Sand
Explanation: Out of all the choices, sand is the only one that cannot react with other substances.
Answer:
sand
Explanation:
all are used mostly in cookin and preparing things and are in the kitchen
the enthalpy for boiling water is 40.7 kj/mol. what is the quantity of heat (in kj) required to boil 945.1 g of water?
Answers
The quantity of heat (in kj) required to boil 945.1 g of water is 2134.30 KJ
Enthalpy of vaporization is theamount of heat required to evaporate the one mole of liquid under constant temperature and pressure. It is also called heat of vaporization.
Δ\(H_{vap}\)(enthalpy of vaporization of H2o)=40.7 KJ/mol
moles of H2o=945.1 gm
moles of H2o=mass/molar mass
=945.1gm/18.02 gm/mol
=52.44 mol
Δ\(H'_{vap}\) to boil 426.1 of H2O= Δ\(H_{vap}\)*no. of moles
= 40.7 KJ/mol*52.44 mol
= 2134.30 KJ
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How many ml of a 0.50 m solution can you obtain from the dilution of 140.8 ml of a 0.92 molar solution?
Answers
You can obtain approximately 258.56 ml of a 0.50 M solution by diluting 140.8 ml of a 0.92 M solution.
To determine the volume of a 0.50 M solution obtained from diluting 140.8 ml of a 0.92 M solution, we can use the formula for dilution:
C₁V₁ = C₂V₂
Where:
C₁ = initial concentration
V₁ = initial volume
C₂ = final concentration
V₂ = final volume
We need to solve for V₂, the final volume of the 0.50 M solution.
Given:
C₁ = 0.92 M
V₁ = 140.8 ml
C₂ = 0.50 M
Rearranging the formula, we have:
V₂ = (C₁ * V₁) / C₂
Substituting the given values, we get:
V₂ = (0.92 M * 140.8 ml) / 0.50 M
The units of moles cancel out, leaving us with the final volume in ml:
V₂ = (0.92 * 140.8) / 0.50
V₂ ≈ 258.56 ml
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Write three sentences that provide evidence supporting your claim about how the illustration and student observations support the cell theory?
Answers
Answer:
The cell theory claims these three components:
1. cell is the smallest functional unit of life: It can be observed under the microscope that cells have various type of molecules and organelles present and have adifferent functional role in the cell which explains that the cell is the smallest unit of life as its molecules or organelles can not carry the life process on their own.
2. All organisms are made up of cells: From bacteria and archaea to human and other life forms are made up of a single cell or organization of cells in a specific pattern it also can be observed by the microscopic of blood or other tissue or cell of an organism.
3. Arise from pre-existing cell: The cells are can be studied under a microscope during cell division where we can observe that new cells come from the pre existing cell by the cell division.
______ have trees with cones.
A. temperate rainforests
B. boreal forests
C. tropical rainforests
D. temperate deciduous forests
Answers
Answer:
D.
Explanation:
A study was conducted of 90 adult male patients following a new treatment for congestive heart failure. One of the variables measured on the patients was the increase in exercise capacity (in minutes) over a 4-week treatment period. The previous treatment regime had produced an average increase of μ=2 minutes. The researchers wanted to evaluate whether the new treatment had increased the value of μ in comparison to the previous treatment. The data yielded y(bar)=2.17 and s=1.05.
(a) if the actual value of mu is 2.1 and alpha is reduced from 0.05 to 0.01, what would be the effect on the power curve?
(b) If the sample size is reduced from 90 to 50, what would be the effect on the power curve?
Answers
a. Decreasing alpha from 0.05 to 0.01 makes the significance level more stringent. You will be less likely to reject the null hypothesis, even when it's false. This increases the probability of a Type II error, thus potentially reducing the power of the test. The power curve will shift to the left.
b. If the sample size is reduced from 90 to 50, the effect on the power curve is that it will also shift towards the left.
What more should you know about decreasing the alpha and the power curve?The power curve is a graph that shows the probability of rejecting the null hypothesis as a function of the true value of the mean.
In the given scenarios of this study, Reducing the significance level and reducing the sample size will shift the power curve to the left, indicating a decrease in the statistical power of the test.
The power of a statistical test is the probability that it correctly rejects the null hypothesis when the alternative hypothesis is true.
a) Reducing alpha from 0.05 to 0.01 means that we are more stringent in our assessment of whether the new treatment is effective.
This will result in a decrease in the power of the test, meaning that it is less likely that we will be able to detect a difference between the new treatment and the previous treatment.
b) If the sample size is reduced from 90 to 50, the effect on the power curve is that it will also shift towards the left.
This is because a smaller sample size decreases the power of the test. A larger sample size provides more information and thus makes it more likely to correctly reject the null hypothesis when the alternative hypothesis is true.
Therefore, by reducing the sample size, you are decreasing the likelihood of detecting a true effect if one exists, thus reducing the power of the test.
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Determine the molarity of a solution that contains 30 moles naoh in 0.80 liters of solution?
Answers
Taking into account the definition of molarity, the molarity of a solution that contains 30 moles naoh in 0.80 liters of solution is 37.5 \(\frac{moles}{liters}\).
Definition of molarityMolar concentration or molarity is a measure of the concentration of a solute in a solution and indicates the number of moles of solute that are dissolved in a given volume.
The molarity of a solution is calculated by dividing the moles of solute by the volume of the solution:
\(Molarity=\frac{number of moles}{volume}\)
Molarity is expressed in units \(\frac{moles}{liters}\).
This caseIn this case, you have:
number of moles= 30 molesvolume= 0.80 LReplacing in the definition of molarity:
\(Molarity=\frac{30 moles }{0.80 L}\)
Solving:
Molarity= 37.5 \(\frac{moles}{liters}\)
Finally, the molarity of a solution that contains 30 moles naoh in 0.80 liters of solution is 37.5 \(\frac{moles}{liters}\).
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What is the molar mass for Cr(NO3)2
Answers
To find the molar mass of the given compound, we have use the molar masses of each element present in the molecule and multiply them by the number of atoms of each element in the molecule. Once we have these values, add them.
It means that we have to multiply the molar mass of Cr times 1, the molar mas of N times 2 and the molar mass of O times 6:
\(52g/mol\cdot1+14g/mol\cdot2+16g/mol\cdot6=176g/mol\)It means that the molar mass of Cr(NO3)2 is 176g/mol.
Para el elemento de Z-56 b, que formula minima tiene el compuesto que forma con 17-cl¿ c, que tipo de union hay en dicho compuesto¿ d, cual es la estructura de lewis del compuesto formado¿
Answers
Answer:
ver explicacion
Explanation:
El elemento que tiene el número atómico 56 en la tabla periódica del bario. El bario es un elemento del grupo dos.
Se combina con el cloro para formar cloruro de bario. que tiene la fórmula BaCl2 de acuerdo con la valencia de ambos elementos.
El cloruro de bario es un compuesto iónico.
During an investigation, a scientist heated 123.6 g of copper carbonate till it decomposed to form a black residue. The total mass of the black residue formed was 79.6 g. Does the law of conservation of mass hold true in this case?
Answers
No, the Law of Conservation of Mass does not hold true for this case because the mass of reactant is not equal to the mass of product.
What is Law of Conservation of Mass?
According to the Law of Conservation of Mass, during a chemical reaction, the total masses of the products and reactants must be equal.This law states that although mass can be reorganized in space or the entities connected to it can change shape, mass itself cannot be generated or destroyed.For instance, the mass of the components prior to a chemical reaction (reactants) is equal to the mass of the components following the reaction (products).Therefore, the entire mass of the reactants, or starting materials, must be equal to the mass of the products during any chemical reaction and low-energy thermodynamic processes in an isolated system.Here, the mass of the reactant (copper carbonate) is not equal to the mass of the product (black residue). Hence, the Law of Conservation of Mass is not applicable in this case.To learn more about Law of Conservation of Mass from the given link
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ATCG combine different patterns to form different ____
Answers
Answer:
Chemicals
Explanation:
Your answer would be chemicals because of you have different inputs you would also have a different output depending.
I hope it helps! Have a great day!
Anygays-
Answer:
Chemicals
Explanation:
Different ATCG makes different chemicals.
I hope it helps! Have a great day!
Muffin °-°
oi oi oi oi oi help pls
Answers
Answer:
F
Explanation:
nonmetal doesn't conduct, is shiny and silver and is solid. Hope this helps :)
In July 1994 the comet shoemaker-levy 9 collided with the planet Jupiter, as scientists had predicted. To be able to accurately predict when a comet will collide with a planet, it is essentially understand -
Answers
Answer:
the gravitational attraction that exists between all bodies
Explanation:
Comet shoemaker-levy 9 was the comet that broke away and collided with the largest planet on our solar system, the Jupiter. The comet fall apart from the asteroids in the year 1992 and flew and hit Jupiter in the year 1994. This was predicted by the scientist.
Similarly when a comet can hit a planet can be accurately predicted by the scientist or the researcher by understanding and studying the gravitational forces that exists between the bodies in the solar system. It is very important to understand the gravitational attractions which exists between all the bodies in the universe in order to calculate or predict when can a comet collide with a planet.
if an airplane travles 4000 miles south in 8 hours what is its velocity
Answers
Answer:
Velocity = Distance Covered÷Time Taken
Velocity = 4000÷8
V = 500
College students are asked to report their blood type (O,A,B, or AB) and their age (younger than 21,21 to 24 , older than 24 ). Their responses are represented in the following two-way table, with some of the totals left for you to calculate. What proportion of respondents with blood type O are 21 to 24? 0.376 0.429 0.432
Answers
Proportion cannot be determined without the necessary data.
What proportion of respondents with blood type O are in the age range of 21 to 24?To determine the proportion of respondents with blood type O who are between the ages of 21 to 24, we need to find the ratio of the number of individuals with blood type O and age between 21 to 24 to the total number of respondents with blood type O.
However, the two-way table with the necessary information is not provided, making it impossible to provide an accurate proportion.
The values 0.376, 0.429, and 0.432 given in the question are potential answers, but without the actual data, we cannot determine the correct proportion.
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What are the first two questions?
15 points each questions
Answers
Answer:
The molar mass of Na+ (sodium ion) is 22.99 g/mol, based on the atomic mass of sodium (Na) from the periodic table.
To calculate the number of ions in 0.187 moles of Na+ ions, we can use Avogadro's number, which is 6.022 x 10^23 ions/mole.
Number of ions = moles of ions x Avogadro's number
Number of ions = 0.187 moles x 6.022 x 10^23 ions/mole
Number of ions = 1.124 x 10^23 ions
So, there are approximately 1.124 x 10^23 Na+ ions in 0.187 moles of Na+ ions.
Explanation:
What organelle is sac like and stores different materials?
Group of answer choices
endoplasmic reticulum
vacuoles
ribosomes
Golgi Body
Answers
if you have 3 dozen pennies how many ml of water would they displace
Answers
The mass of the displaced fluid can be expressed in terms of the density and its volume, m = ρV. The fluid displaced has a weight W = mg, where g is acceleration due to gravity. Therefore, the weight of the displaced fluid can be expressed as W = ρVg.
a chloride ion (cl-) has the same number of electrons as a neutral atom of -
Answers
A chloride ion (Cl-) has the same number of electrons as a neutral atom of chlorine (Cl).
A neutral atom of chlorine has 17 electrons in its outermost shell. When it gains an electron, it becomes a negatively charged ion known as chloride ion.
This additional electron fills up the outermost shell, which now has a total of 18 electrons. This is because the number of electrons in an atom is equal to the number of protons in the nucleus, which determines the atomic number and the element.
When an atom gains or loses an electron, it becomes an ion with a positive or negative charge, respectively.
This is because the number of protons in the nucleus still determines the atomic number and element, but the number of electrons now differs from that of a neutral atom. In the case of a chloride ion, it has 18 electrons, which is one more than a neutral atom of chlorine.
The extra electron creates an excess negative charge, balancing out the positive charge of the 17 protons in the nucleus.
It's worth noting that while a chloride ion has the same number of electrons as an argon atom, they are not the same element. Argon has 18 protons in the nucleus, while chlorine has 17.
Additionally, argon's electron configuration is such that all of its shells are filled, whereas chlorine's outermost shell has room for one more electron before it becomes full.
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(a) what is meant by diffusion? give one example of diffusion in gases.
(b) why do gase diffuse very fast?
(d) Name two gases of air which dissolve in water by diffusion. what is the importance of this process in nature?
please answer it fast
Answers
b) Gaseous particles tend to undergo diffusion because they have kinetic energy.
Answer:
The gases which dissolve in water by diffusion are carbon dioxide and oxygen.
Explanation:
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Explain the flexibility and the flow characteristics of water
Answers
Explanation:
Flow-duration data are daily mean flow values measured over a specified time interval that have been exceeded various percentages of the specified time interval.
Water is a very flexible material. It can flow in many different directions and shapes. This flexibility makes it great for many different purposes, such as drinking, washing, and irrigation. Water is considered to be a flexible substance because it can change its shape according to space.
What are the characteristics of water?Water is a liquid at standard temperature and pressure (25 degrees Celsius and 1 atm, for liquids).
Water is is tasteless and odorless.
Water is transparent in the visible part of the electromagnetic spectrum.
Water can act as either an acid or a base.
Water is a universal solvent, dissolving many substances found in nature.
Water is the most abundant compound on Earth’s surface. In nature, water exists in the liquid, solid, and gaseous states. It is in dynamic equilibrium between the liquid and gas states at 0 degrees Celsius and 1 atm of pressure. At room temperature (approximately 25 degrees Celsius), it is a tasteless, odorless, and colorless liquid. Many substances dissolve in water, and it is commonly referred to as the universal solvent.
Therefore, Water is a very flexible material. It can flow in many different directions and shapes. This flexibility makes it great for many different purposes, such as drinking, washing, and irrigation. Water is considered to be a flexible substance because it can change its shape according to space.
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If the pk values for phosphoric acid are 2. 15, 6. 82 and 12. 38, at what ph would one observe equal amounts of h2po4- and hpo42-?
Answers
Answer: https://homework.study.com/explanation/if-the-pk-a-values-for-phosphoric-acid-are-2-15-6-82-and-12-38-at-what-ph-would-one-observe-equal-amounts-of-h-2-po-4-and-hpo-4-2.html
Explanation:
website to the answer lol
What is theoretical yield in moles of oxygen when there are 18.3 moles of hydrogen ?
2H2 + O2 --> 2H2O
Answers
The theoretical yield of the water in the reaction is 329.4 g.
What is the theoretical yield?
We know that we can be able to obtain the theoretical yield when we look at the stoichiometry of the reaction that we have here. In this case, it is clear that would need to rely on the reaction equation and it would be our guide.
We have that;
2 moles of hydrogen would produce 2 moles of water
18.3 moles of hydrogen would also produce 18.2 moles of water.
Theoretical yield of water would now be;
18.3 * 18 g/mol
= 329.4 g
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99℅ of HNO3 is? for 25 pts......
Answers
Answer:
A)strong and concentrated
Explanation:
I think. I haven't done chemistry since high school!
Answer:
Hello! Your answer would be (A)
Explanation: Hope this helped you out!
6. Which type of force(s) will cause a change in an object's motion? *
A) Balanced Forces
O B) Unbalanced Forces
Answers
Unbalanced forces cause a change in motion, speed, and/or direction. When two forces act in the same direction on an object, the net force is equal to the sum of the two forces.
Answer:
B.Unbalanced .............
Select all answers that are correct.
George Washington Carver received _____ from God during early morning walks in the woods.
guidance
inspiration
finances
solutions
Answers
Answer:
inspiration
Explanation:
Two molecules that speed up or slow down a reaction are called the ( )and the ( )
Answers
in order for a titration to be effective, all of the following must be true of the reaction, except a. reaction must be stoichiometric b. reaction must produce a precipitate c. reaction must be quantitative d. reaction must be rapid
Answers
In order for a titration to be effective, the reaction must produce a precipitate. The correct answer is option B, "reaction must produce a precipitate."
For a titration to be effective, the reaction must be stoichiometric, quantitative, and rapid. A stoichiometric reaction is one in which the amount of reactants is proportional to the amount of products.
A quantitative reaction is one in which all the reactants are consumed, leaving no excess. A rapid reaction is one that occurs quickly and does not take a long time to complete.
However, a reaction producing a precipitate is not necessary for the titration to be effective. Hence option B is correct.
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Acetylene, C2H2, burns according to the following reaction: C2H2 5O2 --> 4CO2 2H2O. Suppose 1.20 g of C2H2 is mixed with 3.50 g of O2 in a closed, steel container, and the mixture is ignited. What substances will be found in the mixture left when the burning is complete
Answers
C2H2 will be left when the burning is complete.
The equation of the reaction is; 2C2H2 + 5O2 --> 4CO2 + 2H2O
The number of moles of C2H2 reacting is = 1.20 g/26 g/mol = 0.046 moles
The number of moles of O2 is = 3.50 g/32 g/mol = 0.109 moles
Since;
2 mole of C2H2 reacts with 5 moles of O2
x moles of C2H2 reacts with 0.109 moles of O2
x = 2 mole × 0.109 moles/5 moles
x = 0.044 moles of C2H2.
It then follows that C2H2 is the reactant in excess so C2H2 will be left when the burning is complete.
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True or False. Frogs have to drink a lot of water.
Answers
Answer:
frogs do require alot of water, although they do not drink it, they absorb it through their skin.
Explanation: so, it is false.