A gas sample is held at a constant temperature of 25°C. The gas occupies 0.86 L when the pressure is 142
kPa. If the sample is compressed to a volume of 0.11, what will the pressure of the gas be?
Answers
We can use the formula for Boyle's Law to solve this problem, which states that the product of the pressure and volume of a gas is constant when the temperature is held constant:
P1V1 = P2V2
where P1 and V1 are the initial pressure and volume, and P2 and V2 are the final pressure and volume.
Plugging in the given values, we get:
P1 = 142 kPa
V1 = 0.86 L
V2 = 0.11 L
Solving for P2, we get:
P2 = (P1V1)/V2
= (142 kPa x 0.86 L)/0.11 L
= 1103.27 kPa
Therefore, the pressure of the gas will be 1103.27 kPa when compressed to a volume of 0.11 L at a constant temperature of 25°C.
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Related Questions
the ______ heat capacity of a substance is the amount of heat needed to change the temperature of 1 mol of that substance by ___ K
Answers
The molar heat capacity of a substance is the amount of heat needed to change the temperature of 1 mol of that substance by 1 K.
The molar heat capacity of a substance is a physical property that describes the amount of heat energy required to raise the temperature of one mole of the substance by one Kelvin (or one degree Celsius). It is typically denoted by the symbol Cm and has units of joules per mole per Kelvin (J/(mol K)).
The molar heat capacity of a substance depends on various factors such as the nature of the substance, its phase (solid, liquid, or gas), and the conditions under which the temperature change occurs (constant pressure or constant volume).
For example, the molar heat capacity of a gas at constant pressure is usually greater than its molar heat capacity at constant volume, because the gas is allowed to expand and do work on its surroundings at constant pressure, which requires additional energy input.
The molar heat capacity is an important property in thermodynamics and is used in many calculations involving heat transfer, energy conversion, and chemical reactions. It is also used to determine the specific heat capacity of a substance, which is the amount of heat energy required to raise the temperature of a unit mass of the substance by one Kelvin (or one degree Celsius).
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what element can be found in both plays and stories
Answers
The element that can be found in both plays and stories is "characters."
Characters are an essential element of both plays and stories. They are the individuals or entities that drive the narrative, interact with each other, and contribute to the development of the plot. In plays, characters are typically portrayed by actors who perform their roles on stage, while in stories, characters are described and depicted through written words.
Characters can be central or supporting figures in a play or story, and they play a vital role in engaging the audience or readers. They have distinct personalities, motivations, and relationships that influence the events and conflicts within the narrative. Through their actions, dialogue, and character development, they contribute to the overall themes and messages conveyed by the play or story.
Whether it is a theatrical production or a written narrative, the presence and portrayal of characters are fundamental to creating engaging and compelling plays and stories.
Thus, the element that can be found in both plays and stories is "characters."
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A certain acid, HA, has a pKa of 6. What is the pH of a solution made by mixing 0.20 mol of HA with 0.30 mol of NaA? b. A certain acid, HA, has a pKa of 6. In the previous problem, you considered a solution made by mixing 0.20 mol of HA with 0.30 mol of NaA. What, now, would the pH be if 0.05 mol of NaOH were added to that solution? If you need to, assume the solution is at 25 oC, where the Kw is 1.0x10-14. c. A certain acid, HA, has a pKa of 6. What is the pH of a solution made by mixing 200 mL of 0.20 M HA (aq) with 300 mL of 0.30 M NaA (aq)? If you need to, assume the solution is at 25 oC, where the Kw is 1.0x10-14. d. A certain acid, HA, has a pKa of 6. In the previous problem, you considered a solution made by mixing 200 mL of 0.20 M HA (aq) with 300 mL of 0.30 M NaA (aq). What, now, would the pH be if 10 mL of 0.50 M HCl were added to that solution? If you need to, assume the solution is at 25 oC, where the Kw is 1.0x10-14.
Answers
In order to determine the pH in the given scenarios, several calculations and considerations need to be taken into account.Firstly, the Henderson-Hasselbalch equation can be used, which relates the pH of a solution to the pKa of the acid and the ratio of its conjugate base to the acid. This equation is pH = pKa + log([A-]/[HA]), where [A-] is the concentration of the conjugate base and [HA] is the concentration of the acid.
What are the calculations and considerations involved in determining the pH in the given scenarios?
The first problem asks for the pH of a solution made by mixing 0.20 mol of acid HA with 0.30 mol of its conjugate base NaA. The pH can be calculated using the Henderson-Hasselbalch equation, pH = pKa + log([A-]/[HA]). Given that the pKa is 6, we can plug in the values and solve for the pH.
The second problem asks for the pH after adding 0.05 mol of NaOH to the previous solution. Since NaOH is a strong base, it will react with the acid HA and form water.
The amount of NaOH added is small compared to the amount of acid, so we can assume that the acid will be fully neutralized. We can calculate the resulting concentration of the acid and its conjugate base and use the Henderson-Hasselbalch equation to find the new pH.
The third problem involves mixing 200 mL of 0.20 M HA with 300 mL of 0.30 M NaA. We need to calculate the concentrations of the acid and its conjugate base after mixing, and then use the Henderson-Hasselbalch equation to find the pH.
The fourth problem asks for the pH after adding 10 mL of 0.50 M HCl to the previous solution. Since HCl is a strong acid, it will completely dissociate and increase the concentration of the acid HA.
We need to calculate the new concentrations of the acid and its conjugate base and use the Henderson-Hasselbalch equation to find the new pH.
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The sun’s mass is about 30 million times greater than the moon. Why does the gravitational pull between Earth and the moon affect Earth’s tides more than the gravitational pull between Earth and the sun? a The moon is denser than the sun. b The moon is closer to Earth than the sun. c The moon has phases, but the sun does not. d The moon orbits Earth, but the sun does not.
Answers
Answer:
The moon is closer to earth
Explanation:
Around each new moon and full moon, the sun, Earth, and moon arrange themselves more or less along a line in space. Then the pull on the tides increases, because the gravity of the sun reinforces the moon's gravity. ... Thus, at new moon or full moon, the tide's range is at its maximum.
5. list the following alkyl halides in order of increasing sn1 reaction rate. what will be the reaction rate order for sn1 reaction rate? provide your reasoning.
Answers
The reaction rate order for sn1 reaction rate will be CH3F < CH3Cl < CH3I. The reason for this is that the halide with the weaker nucleophile will have a higher sn1 reaction rate.
The Effect of Nucleophile Strength on Sn1 Reaction RateThe nucleophile is a key factor in determining the rate of an Sn1 reaction. In general, the stronger the nucleophile, the faster the reaction will be. This is because the stronger nucleophile will be able to break the bond between the alkyl halide and the nucleophilic carbon more easily. For this reason, the order of increasing Sn1 reaction rate will be CH3F < CH3Cl < CH3I.
Complete Question:
List the following alkyl halides in order of increasing sn1 reaction rate. what will be the reaction rate order for sn1 reaction rate? provide your reasoning.
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true or false:
1. chemical bonds have only one form.
2. All compounds are neutral.
3. covalent bonds do not exhibit any sort of preferential charge between atoms.
4. a covalent bond can only involve one shared electron.
Answers
What happens when two magnets rappel each other hehe
Answers
Answer:
Every magnet has two sides: a north pole and a south pole. We use these names because if you hang a magnet from a thread, the magnet’s north pole points (almost) towards the north direction.
This is because the Earth’s core (its centre) is a large, weak magnet. Your little, strong magnet lines up with Earth’s magnetic core, so it points north. That’s how a magnetic compass works.
What is the density of a 234 g sample with a volume of 22 mL?
Answers
Answer: 10.63
Explanation: You divide the mass by volume.
Answer:
10.64g/cm³
Explanation:
1cm³ = 1ml
22 × 1cm³ = 22cm³
Density = Mass ÷ Volume
234 ÷ 22
Density = 10.64g/cm³ or 10640kg/m³
The molar solubility of Ag2S is 1.26 × 10-16 M in pure water. Calculate the Ksp for Ag2S.a) 6.81 × 10-63b) 1.59 × 10-32c) 3.78 × 10-12d) 1.12 × 10-8e) 8.00 × 10-48
Answers
The Ksp for Ag2S is 6.81 × 10-63, which corresponds to option a).
To calculate the Ksp for Ag2S given its molar solubility, we need to follow these steps:
1. Write the balanced chemical equation for the dissolution of Ag2S:
Ag2S (s) ⇌ 2Ag+ (aq) + S2- (aq)
2. Use the molar solubility (1.26 × 10-16 M) to determine the concentration of each ion at equilibrium:
[Ag+] = 2 × (1.26 × 10-16 M) = 2.52 × 10-16 M
[S2-] = 1.26 × 10-16 M
3. Write the expression for the Ksp of Ag2S:
Ksp = [Ag+]^2 × [S2-]
4. Substitute the equilibrium concentrations into the Ksp expression:
Ksp = (2.52 × 10-16)^2 × (1.26 × 10-16)
5. Calculate the Ksp:
Ksp = 6.81 × 10-63
So, the Ksp for Ag2S is 6.81 × 10-63.
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hydrates Question 7 of 10 Which two molecules do green plants use to make glucose?
Answers
Green plants use two molecules, carbon dioxide (CO₂) and water (H₂O), to make glucose through the process of photosynthesis.
During photosynthesis, plants capture energy from sunlight and convert it into chemical energy stored in glucose. The process occurs in the chloroplasts, which contain the pigment chlorophyll that gives plants their green color. Carbon dioxide is obtained from the atmosphere through tiny openings in the plant's leaves called stomata.
Water is absorbed by the roots and transported to the leaves through specialized tissues called xylem. In the first stage of photosynthesis, known as the light-dependent reactions, light energy is absorbed by chlorophyll, which triggers a series of chemical reactions that produce energy-rich molecules like ATP (adenosine triphosphate) and NADPH (nicotinamide adenine dinucleotide phosphate).
These energy carriers are then utilized in the next stage. In the second stage, called the light-independent reactions or the Calvin cycle, carbon dioxide from the atmosphere enters the leaf and combines with the energy-rich molecules ATP and NADPH.
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For an organism’s scientific names, the first part is the ________ and the second is the ________.
A
species, genus
B
kingdom, phylum
C
genus, species
D
class, order
Answers
Answer:
C
Explanation:
For an organism scientific names the first part is the genus and the second is the species
For an organism’s scientific names, the first part is the genus and the second is the species. Therefore, the correct option is option C.
What is organism’s scientific name?The genus name and particular epithet make up the binomial name. Italicization is used for species names. The specific epithet comes after the genus name and therefore is not capitalized; the genus name is usually capitalized and written first. This is true without exception.
A scientific name has two components. Genus name comes first, followed by species name. If typed, it is always in italics or underlined (handwritten). Genus names always begin with a capital letter. The initial letter of the word species is not capitalized, though. For an organism’s scientific names, the first part is the genus and the second is the species.
Therefore, the correct option is option C.
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The molar mass of ammonium acetate is 77.083 g/mol. A student uses 0.100 mol of ammonium acetate in a chemical reaction. The
student claims that the reaction uses (0.100 mol) (77.083 g/mol) = 7.71 g of ammonium acetate, which has
(7.71) (6.022 x 1023) = 4.64 x 1024 molecules.
In one to two sentences, explain the mistake that the student made and determine the correct number of molecules of ammonium
acetate used in the reaction.
Answers
The student's claim of 4.64 × 10^24 molecules is incorrect, and the correct number of molecules of ammonium acetate used in the reaction is 6.022 × 10^22 molecules.
The mistake the student made is assuming that the molar mass of ammonium acetate directly corresponds to the number of molecules. However, the molar mass of a substance represents the mass of one mole of that substance, not the number of molecules.
To determine the correct number of molecules of ammonium acetate used in the reaction, we need to use Avogadro's number, which relates the number of particles (atoms, molecules, etc.) in one mole of a substance.
Avogadro's number is approximately 6.022 × 10^23 particles/mol. Given that the student used 0.100 mol of ammonium acetate, we can calculate the correct number of molecules by multiplying the number of moles by Avogadro's number:
Number of molecules = (0.100 mol) × (6.022 × 10^23 molecules/mol)
Performing the calculation, we find that the correct number of molecules of ammonium acetate used in the reaction is 6.022 × 10^22 molecules.
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Which of the following is shown correctly in scientific notation
Answers
Answer:
1.03 × 10¹
Explanation:
The decimal point is after the first non-zero digit number. The decimal or the number is multiplied by a 10 with an exponent.
PLEASE I REALLY NEED HELP!!! ITS NOT MULTIPLE CHOICE BTW :'(
A 76.0-gram piece of metal at 96.0 °C is placed in 120.0 g of water in a calorimeter at 24.5 °C. The final temperature in the calorimeter is 31.0 °C. Determine the specific heat of the metal. Show your work by listing various steps and explain how the law of conservation of energy applies to this situation.
Answers
Answer:
660J/kg.°C
Explanation:
Using the fact that
∆E of metal + ∆E of water = 0
∆E of the metal = Q = m*c*(T2-T1)
Where
Q = heat lost or gained = ?
m = mass of metal in kg = 0.076kg
c = specific heat of the metal = ?
T1 = 96°C
T2=31°C
∆E of the water=Q= m*c*(T2-T1)
Where
Q = 0.120*4180*6.5 = 3260J
Therefore
3,260J + Q of the metal =0
3,260J + 0.076*C*(31.0–96.0)=0
3,260J - 4.94c = 0
3,260 = 4.94c
3,260/4.94 = c
660J/kg.°C = specific heat of the metal
hope this helps:)
Mikala pours a tablespoon of salt into a beaker of water. Diffusion will cause the salt molecules to dissolve in the molecules of water. How could Mikala increase the diffusion rate of the salt molecules?
A. Mikala could remove all sources of light from the beaker.
B. Mikala could slowly pour more water into the beaker.
C. Mikala could decrease the temperature of the solution.
D. Mikala could increase the temperature of the solution.
Answers
Explanation- diffusion rates increase at higher temperatures!
What is the ability to do work
Answers
Answer:
The ability to do work is called energy.
Radium undergoes alpha decay. The product of this reaction also undergoes alpha decay. What is the product of this second decay reaction? Th Rn Po OU OHg
Answers
The product of the second alpha decay reaction after radium's decay is polonium (Po). Radium undergoes alpha decay to produce radon (Rn), which also undergoes alpha decay to produce polonium.
Radium is a highly radioactive element that was discovered in 1898 by Marie and Pierre Curie. It is a silvery-white metal that is found in trace amounts in uranium ores. Radium is known for its high level of radioactivity and is used in various applications, such as cancer treatment, fluorescent lighting, and radiography.
Alpha decay is one of the three main types of radioactive decay, along with beta decay and gamma decay. It occurs when an atom emits an alpha particle, which consists of two protons and two neutrons. Alpha decay is typically observed in heavy elements, such as radium, uranium, and plutonium.
When radium undergoes alpha decay, it emits an alpha particle and transforms into radon. Radon is a colorless and odorless gas that is also highly radioactive. It is a health hazard and is known to cause lung cancer. Therefore, it is important to monitor radon levels in indoor environments.
In conclusion, the product of the second alpha decay reaction after radium's decay is polonium (Po). Alpha decay is a type of radioactive decay that occurs when an atom emits an alpha particle, which consists of two protons and two neutrons. Radium undergoes alpha decay to produce radon (Rn), which also undergoes alpha decay to produce polonium. Polonium is a highly radioactive element that was discovered by Marie and Pierre Curie in 1898. It is a health hazard and is known to cause cancer. Therefore, it is important to handle polonium with care and to monitor its levels in the environment.
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Study the reactions for the formation of compounds from their elements. I. C(s) + O2(g) → CO2(g) ΔHf = −394 kJ II. H2(g) + 12O2(g) → H2O(l) ΔHf = −242 kJ III. 2C(s) + 3H2(g) → C2H6(g) ΔH =−84 kJ The combustion of C2H6 is shown by the following equation: C2H6(g) + 72O2(g) → 2CO2(g) + 3H2O(l) Which option correctly gives the enthalpy of combustion of 0.2 moles of C2H6(g)? −1,430 kJ 286 kJ −286 kJ 1,430 kJ Exam 3 Click on the numbers to jump from one question to another. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
Answers
Answer:
The correct option is -286 kJ
Explanation:
The given parameters are
C(s) + O₂(g) → CO₂(g) ΔHf = -394 kJ
H₂(g) + 12O₂(g)→H₂O ΔHf = -242 kJ
2C(s) + 3H₂(g)→C₂H₆(g) ΔH = -84 kJ
Te given equation is C₂H₆(g) + 7/2O₂(g) →2CO₂(g) + 3H₂O(l)
The heat of formation or enthalpy of combustion = Heat of formation of the products - Heat of formation of the reactants
The enthalpy of combustion of the reaction = 2*(-394) + 3*(-242)- ((-84)+7/2*0)) = -1,430 kJ
Given that the reaction consists of one mole of C₂H₆(g), we have;
The enthalpy of combustion of one mole of C₂H₆(g) = -1,430 kJ
Therefore, the enthalpy of combustion of 0.2 mole of C₂H₆(g) = -1,430 kJ × 0.2 = -286 kJ
The correct option = -286 kJ.
Answer:
Positive 1,430
Explanation:
If Ar has an effusion rate 0. 856, what is the rate of effusion for CCl4
Answers
The rate of effusion for carbon tetrachloride (CCl4) is approximately 0.349.
How to calculate the valueThe molar mass of argon (Ar) is approximately 39.95 g/mol, and its effusion rate is given as 0.856.
Molar mass of C = 12.01 g/mol
Molar mass of Cl = 35.45 g/mol
Molar mass of CCl = (12.01 g/mol) + 4 × (35.45 g/mol) = 153.82 g/mol
Now, let's use Graham's law of effusion to find the rate of effusion for CCl₄:
Rate of effusion for CCl₄ / Rate of effusion for Ar = ✓(Molar mass of Ar / Molar mass of CCl₄)
Rate of effusion for CCl₄ / 0.856 = ✓(39.95 g/mol / 153.82 g/mol)
Rate of effusion for CCl₄ = 0.856 × ✓(39.95 g/mol / 153.82 g/mol)
Rate of effusion for CCl₄ ≈ 0.349
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If argon has an effusion rate 0. 856, what is the rate of effusion for CCl₄
There are no significant losses of P by leaching or in
gaseous form. So why are phosphates so low in soil
solution?
Answers
The low concentration of phosphates in soil solution can be attributed to factors such as adsorption, precipitation, and immobilization.
Phosphates (PO₄³⁻) are an essential nutrient for plant growth, and their availability in soil solution is crucial for plant uptake. However, several factors contribute to the low concentration of phosphates in the soil solution:
1. Adsorption: Phosphates have a strong affinity for soil particles, particularly clay and organic matter. They can readily adsorb onto the surfaces of these particles, reducing their concentration in the soil solution and making them less accessible to plants.
2. Precipitation: Phosphates can react with cations, such as calcium (Ca²⁺) and iron (Fe³⁺), to form insoluble compounds like calcium phosphate or iron phosphate. These precipitates further decrease the concentration of phosphates in the soil solution.
3. Immobilization: Soil microorganisms and organic matter can immobilize phosphates by incorporating them into their biomass. This immobilization process temporarily removes phosphates from the soil solution, limiting their availability to plants.
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How can you convince someone that the earth moves slowly?
Answers
Answer:
By a resource or an EXTREMELY good explanation with good reasons and details.
Explanation:
write the electron arrangement of beryllium. write the number of electrons in each level in ascending level order, separated by a comma. provide your answer below:
Answers
The electron arrangement of beryllium (Be) is 1s² 2s².
Beryllium is a silvery-white metal. It is relatively soft and has a low density. Uses. Beryllium is used in alloys with copper or nickel to make gyroscopes, springs, electrical contacts, spot-welding electrodes and non-sparking tools.
This means that beryllium has two electrons in the 1s orbital and two electrons in the 2s orbital. In ascending level order, the number of electrons in each level would be 2, 2.
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Biochemical oxygen demand (BOD) measures organic pollutants in water by measuring the amount of oxygen consumed by microorganisms that break down these compounds. BOD is hard to measure accurately. Total organic carbon (TOC) is easy to measure, so it is common to measure TOC and use regres- sion to predict BOD. A typical regression equation for water entering a municipal treatment plant is11
BOD = ?55.43 + 1.507 TOC
Both BOD and TOC are measured in milligrams per liter of water.
(a) What does the slope of this line say about the relationship between BOD and TOC?
(b) What is the predicted BOD when TOC = 0? Values of BOD less than 0 are impossible. Why do you think the prediction gives an impossible value?
Answers
The positive slope of the regression line indicates that there is a positive relationship between BOD and TOC. When TOC = 0, the predicted BOD is -55.43.
What is Biochemical oxygen demand (BOD) ?Biochemical oxygen demand (BOD) is a measure of the amount of dissolved oxygen that microorganisms use in the process of breaking down organic matter in water. It is a commonly used parameter to assess the level of organic pollutants in water.
For part a) The positive slope of the regression line indicates that there is a positive relationship between BOD and TOC, meaning that as TOC increases, BOD also tends to increase.
(b) When TOC = 0, the predicted BOD is -55.43. This prediction gives an impossible value because BOD is a measure of the amount of oxygen consumed by microorganisms, and it cannot be negative. This negative prediction may be due to the limitations of the regression equation, such as assuming a linear relationship between BOD and TOC, or not taking into account other factors that can affect BOD.
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3. Briefly discuss the results of the TLC. Was there evidence of unreacted p-nitrobenzaldehyde in either product
Answers
TLC means Thin Layer Chromatography. It is a method that can best be described as "Affinity-Based" used in the separation of compounds that are in a mixture.
What is unreacted p-nitrobenzaldehyde?Unreacted p-nitrobenzaldehyde is simply an organic aromatic compound that contains a nitro group para-substituted to an aldehyde. in this case, if it is unreacted, that means it is the same as before the chemical reation.
Note that the question is missing key information hence the general answer.
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if a large amount of calcium sulfate [it does not form a gas with the addition of hc(ag)] is present in the original sample, how does it affect the reported
Answers
The presence of a large amount of calcium sulfate will affect the reported results because calcium sulfate does not react with HCl(aq).
A. The molar volume of the \(CO_2(g)\) would be unaffected by the presence of calcium sulfate, since it does not form a gas with the addition of HCl(aq).
B. The presence of calcium sulfate would cause the reported percent \(CaCO_3\) in the sample to be too low, as the calcium sulfate would not be included in the calculation of the total mass of the sample, which is used to calculate the percent \(CaCO_3\).
Therefore, it will not produce any gas and will not contribute to the total volume of gas produced. This will result in a lower reported result than if the calcium sulfate was not present.
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complete question:if a large amount of calcium sulfate [it does not form a gas with the addition of hcl(aq)] is present in the original sample, how does it affect the reported
a. molar volume of the CO_2(g)-too high, too low, or unaffected? Explain.
b. percent CaCO_3 in the sample-too high, too low, or unaffected? Explain.
What is an air pressure system?
Answers
Answer:
"The number of air molecules above a surface determines air pressure. As the number of molecules increases, they exert more pressure on a surface, and the total atmospheric pressure increases. By contrast, if the number of molecules decreases, so too does the air pressure."
What is the chemical equation C+O-CO2
Answers
Answer:
arbon monoxide reacts with oxygen to produce carbon dioxide. Write the balanced chemical equation for this reaction.
...
Example.
Step Result Equation balanced?
1 carbon monoxide + oxygen → carbon dioxide
2 CO + O 2 → CO 2
3 Reactants: 1 × C, (1 × O) + (2 × O) = 3 × O. Products: 1 × C, 2 × O Not balanced.
4 2CO + O 2 → CO
Which option would be an appropriate model of nuclear fusion?
A adding a drop of water to a glass of water
B sewing one piece of fabric to another
C mashing two marshmallows together
D putting a puzzle together
Answers
Mashing two marshmallows together can be an appropriate model to explain nuclear fusion.
Nuclear fusion is the reaction that occurs when two or more light elements combine to form heavier elements with the release of energy.
Nuclear fusion reactions occur mainly in the production of stars and the main-sequence star, The Sun by the fusion of hydrogen nuclei into helium.
Therefore,The following cannot be a model of Nuclear fusion, because they do not follow the basic concept of nuclear fusion which two light nuclei react to form a single heavy nuclei.
Adding a drop of water to a glass of waterSewing one piece of fabric to anotherPutting a puzzle togetherMarshing two marshmallows together can be a good model to explain nuclear fusion because it follows the basic concept of nuclear fusion
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Answer:
mashing two marshmallows together
Explanation:
i've taken the test
How much energy does an X-ray with an 8 nm (8 x 10-9 m) wavelength have?
Answers
Answer: 2.48×10^-17 J
Explanation:
Given the following :
Wavelength = 8nm (8 x 10^-9 m)
Energy(e) of X-ray =?
Energy=[speed of light(c) × planck's constant (h)] ÷ wavelength
Speed of light = 3×10^8m/s
Planck's constant = 6.626×10^-34 Js
Wavelength = 8 x 10^-9 m
Energy = [(3×10^8) * (6.626×10^-34)] / 8 x 10^-9
Energy = [19.878×10^(8-34)] / 8 x 10^-9
Energy = 2.48475 × 10^(-26+9)
Energy = 2.48×10^-17 J
Answer: 2.48×10^-17 J
Explanation: a pex
when is an object in free fall
Answers
Answer:
a free-falling object is an object that is falling under the sole influence of gravity. That is to say that any object that is moving and being acted upon only be the force of gravity is said to be "in a state of free fall." Such an object will experience a downward acceleration of 9.8 m/s/s.