Answers
Kr < Ar < He the following substances in order of increasing magnitude of the London forces.
What is the force magnitude in London?The size of London forces is sometimes stated to be proportional to the molar mass of the molecules involved; when comparing molecules with identical electronic structures, the bigger molecules are generally heavier.
The strongest intermolecular force is the London dispersion force. When the electrons in two nearby atoms hold locations that cause the atoms to form temporary dipoles, the London dispersion force occurs. This attraction is also known as an induced dipole-induced dipole attraction.
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Related Questions
How does specific heat capacity affect heating rate
Answers
Answer:
The specific heat capacity affect heating rate by the amount of heat needed to raise the temperature of 1 gram of a substance 1 degree Celsius (°C).
Explanation:
Pls mark me as brainliestLook at diagram 2 above. What type of eclipse is shown based on the alignment of the Earth, Sun, and Moon?
Solar eclipse
Lunar eclipse
Answers
Answer:
solar eclipse is when the sun hits earth and lunar means moon or when the sun hits the moon for an eclipse
Explanation:
ASAP PLZ HELP I WILL MARK BRAINLIEST Based on the diagram, what can you conclude about the pole of the magnet? O It is a south pole because the field lines spread out from this end. O It is a north pole because the field lines spread out from this end, O It is a south pole because the field lines enter the magnet at this end. O It is a north pole because the field lines enter the magnet at this end.
Answers
Answer:C
Explanation:I took the test
Answer:
It is a south pole because the field lines enter the magnet at this end.
Explanation:
Do you think mouse offspring will always look like their parents
Answers
Answer:No
Explanation
If you were travelling outward from the earth in a space shuttle at an altitude of 88.4 km you would be in the ----------
Answers
Answer:
air
Explanation:
you would be going through air
If you were travelling outward from the earth in a space shuttle at an altitude of 88.4 km you would be in the air.
What is altitude ?The height of a celestial object above the horizon, as opposed to its vertical elevation above the surface of a planet or natural satellite (such as the ocean or land).
Space grew taller, height is the perpendicular elevation of an object over its base, the ground, a specific level, or one object over another. For example, the altitude of a mountain or a bird above a tree's top are examples of height.
A triangle's altitude is determined by drawing a perpendicular line from its vertex to its opposite side. The altitude, sometimes referred to as the triangle's height, forms a right-angle triangle with the base.
Thus, when travelling outward from the earth in a space shuttle at an altitude of 88.4 km you would be in the air.
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Explain how a rainbow is produced
Answers
A rainbow is produced through a proces that includes refraction, reflection, and dispersion of sunlight.
What more should you know about the production of rainbows?A rainbow is formed when sulinght is refracted and reflected by rain drops in the atmospher.
The sunlight is split into its component colors, which is why rainbows appear as having an array of colors. This is due to each color being bent by a different amount during refraction.
The colors of a rainbow are always in the same order, with red on the outside and violet on the inside.
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A student planned to make copper sulfate crystals from excess copper oxide and dilute sulfuric acid.
The equation for the reaction is:
CuO(s) + H,SO (aq) -, CuSO (aq) + H20(1)
This is the method used.
1. Add 25 cm° of dilute sulfuric acid to a conical flask.
2. Gently warm the dilute sulfuric acid.
3. Add excess copper oxide to the dilute sulfuric acid.
4. Stir the mixture.
5. Heat to evaporate all the water from the mixture.
Suggest two improvements to the method
Explain why each improvement is needed.
A student plans a method to prepare pure crystals of copper sulfate.
The student's method is:
1. Add one spatula of calcium carbonate to dilute hydrochloric acid in a beaker.
2. When the fizzing stops, heat the solution with a Bunsen burner until all the liquid is gone.
The method contains several errors and does not produce copper sulfate crystals.
Explain the improvements the student should make to the method so that pure crystals of copper sulfate are produced.
Answers
The student's method for preparing pure crystals of copper sulfate contains errors and does not produce the desired outcome.
Use copper oxide instead of calcium carbonate: The student should add copper oxide (CuO) to the hydrochloric acid instead of calcium carbonate. Copper oxide reacts with hydrochloric acid to form copper chloride, which can then be converted to copper sulfate through a subsequent reaction with sulfuric acid.
Add sulfuric acid to the copper chloride solution: After the copper chloride solution is formed, the student should add sulfuric acid to it. This reaction between copper chloride and sulfuric acid will yield copper sulfate and hydrochloric acid. The student should ensure that the correct stoichiometric ratio is maintained to maximize the yield of copper sulfate crystals.
Crystal formation: The student should allow the solution to cool slowly after the reaction with sulfuric acid. This promotes the formation of larger, well-defined copper sulfate crystals.
Filtration and drying: Once the crystals have formed, the student should filter the solution to separate the solid crystals from the remaining liquid. The filtered crystals should then be thoroughly dried to remove any remaining water, resulting in pure copper sulfate crystals.
By following these improvements, the student can obtain pure crystals of copper sulfate.
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Which example is a biotic factor of an aquarium environment?
Responses
amount of oxygen in the water
water temperature
amount of sand in the aquarium
number of underwater plants
Answers
To solve this we must be knowing each and every concept related to environment. Therefore, the correct option is option B among all the given options.
What is environment?An environment may be simply defined as a system that includes all abiotic and biotic components that have an impact on human life. All flora and animals are considered biotic, or living, elements, whereas water, sunshine, air, temperature, etc. are considered abiotic.
Any good, service, or feature that benefits people and society might be considered one of an environment's resources. They might be anything that fulfills a person's requirements on a daily basis. Amount of oxygen in the water is a biotic factor of an aquarium environment.
Therefore, the correct option is option B.
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Answer: B: Water Temperature
Explanation: k12 test 1.04 Science Life semester 2
What is the answer to this question?
Answers
Answer:
Protons
Explanation:
Metals, Nonmetals, and Metalloids group the elements on the periodic table. Protons is not one of these but rather a subatomic particle that all the elements have.
Answer:
protons
Explanation:
Many aerosol cans have warning labels on the side
that say to keep away from heat and fire. Why?
Answers
Answer:
Aerosol cans are pressurized, High temperatures increase the pressure in an aerosol can, potentially to the point of explosion.
What is a solution?
A. The substance that is dissolved in another substance
B. The mixture of one substance dissolved in another
C. The substance that dissolves another substance
D. Two liquids that do not mix with each other
SUR
Answers
Answer:
B
Explanation:
this is because solution is the mixture of a solvent and a solute to give you a solution
Answer:
B. The mixture of one substance dissolved in another
Explanation:
write the structural formula for 2-bromo-3-chloro-4,4-dimethylpentanal
Answers
Answer:
Br-CH2-CH(CH3)2-C(Cl)H-CH(CH3)2-CHO
Explanation:
The molecule has a total of 14 carbon atoms, 13 hydrogen atoms, and 1 bromine atom. The carbon atoms are arranged in a chain with a methyl group attached to the second carbon atom, a chlorine atom attached to the third carbon atom, and two methyl groups attached to the fourth carbon atom. The fifth carbon atom has a carbonyl group attached to it.
The molecule is an aldehyde, which means that it has a carbonyl group (C=O) at the end of the chain. The carbonyl group is polar, and the oxygen atom has a partial negative charge. The hydrogen atom has a partial positive charge. This polarity makes the aldehyde group susceptible to nucleophilic attack.
The bromine and chlorine atoms are both electrophilic, which means that they have a partial positive charge. This makes them susceptible to nucleophilic attack.
The methyl groups are non-polar and do not have any significant reactivity.
The molecule is a chiral molecule, which means that it has a mirror image that is not superimposable on itself. This is because the carbon atom with the carbonyl group is attached to four different groups.
The molecule is a liquid at room temperature and has a strong odor. It is used in a variety of products, including perfumes, flavorings, and plastics.
A 200 milliliter sample of gas has a pressure of 1 atmosphere. If the volume of the gas is decreased to 50 milliliters at constant temperature, the new pressure of the gas will be
1) 4 atm
2) 1 atm
3) 3 atm
4) 2 atm
Answers
Answer:
Answer is - 2. ...........
At constant temperature, if the volume of the sample of gas decreases, the pressure increases to 4.0atm.
Hence, option1)4 atm is the correct answer.
What is Boyle's law?Boyle's law simply states that "the volume of any given quantity of gas is inversely proportional to its pressure as long as temperature remains constant.
Boyle's law is expressed as;
P₁V₁ = P₂V₂
Where P₁ is Initial Pressure, V₁ is Initial volume, P₂ is Final Pressure and V₂ is Final volume.
Given the data in the question question;
Initial volume of the gas V₁ = 200mL = 0.2LInitial pressure of the gas P₁ = 1.0atmFinal volume of the gas V₂ = 50.mL = 0.05LFinal pressure of the gas P₂ = ?We substitute our given values into the expression above to determine the new pressure.
P₁V₁ = P₂V₂
P₂ = P₁V₁ / V₂
P₂ = ( 1.0atm × 0.2L ) / 0.05L
P₂ = 0.2Latm / 0.05L
P₂ = 4atm
At constant temperature, if the volume of the sample of gas decreases, the pressure increases to 4.0atm.
Hence, option1)4 atm is the correct answer.
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5. What is the unit for acceleration?
Answers
Answer: the SI unit of acceleration is meters/second^2 (m/s^2). Force (F), Mass (M) and acceleration (g) are linked by Newton’s second law , which states that ‘The acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass.’
Why are cats better than dogs?
Answers
Answer:
Cats are eazy to take care for and relatively affordable
Answer:
cats r better cuz there cats ovi
Explanation:
there small, easy to take care of, and the are good with kids depending on the breed.
sodium combines with water to produce a sodium hydroxide and hydrogen gas. which word equation respresents this violent reaction?
Answers
Answer:
Na(s) + H₂O (l) → NaOH(aq) + H₂(g).
Explanation:
answer is this thank you I hope it helps you pls like
A student measured the maximum mass of salt that can dissolve in 100 mL of water at five different temperatures.
Which variable should go on the y-axis?
the volume of water
the temperature of water
the mass of salt
the mass of water
Answers
Answer:
the mass of salt
Explanation:
In an experiment, we have an independent variable and dependent variable. The independent variable is the variable that is manipulated to cause changes in other variable while the dependent variable is the variable that responds to the changes made to the independent variable and is measured.
In this case of experiment, the mass of the salt is the DEPENDENT VARIABLE while the different temperatures is the INDEPENDENT VARIABLE. In a graphical representation, the independent variable is always plotted on the x-axis or horizontal axis while the dependent variable is always plotted on the y-axis or vertical axis.
Since the dependent variable is the mass of the salt, it should be plotted on the y axis.
Answer:
The temperature of water
Explanation:
I took the test
The Bohr effect:_____.
a. explains through the Bohr model of the atom why Fe2+ will bind O2 in heme but Fe3+ will not.
b. contributes to binding of O2 by hemoglobin in lungs and release of O2 from hemoglobin in tissues.
c. applies to both myoglobin and hemoglobin.
d. relates [H+] to [CO2].
Answers
Answer:
b. contributes to binding of O2 by hemoglobin in lungs and release of O2 from hemoglobin in tissues.
Explanation:
The Bohr effect is a phenomenon described by Christian Bohr. Is an affinity that binds oxygen and hemoglobin and is inversely related to the concentration of carbon dioxide. As CO2 reacts with water and an increase in CO2 results in a decrease in blood ph.1. What first prompted James Watson's desire to solve the structure of DNA?
2. Why were Watson and Crick considered both an unlikely pair and perfect team to solve the structure
of DNA?
3. Who were the other researchers "racing" to find the structure of DNA?
4. How did Rosalind Franklin's data help Watson and Crick with their research?
5. When did Watson and Crick receive the Nobel Prize and why were there only three recipients?
Answers
Explanation:
1. It was as a result of a blurry picture of the DNA eye made by scientist, Maurice Wilkins, this glimpse of the DNA made James Watson even more curious about the DNA.
2. They were considered an unlikely pair due to their age difference of about 12 years. Seemed unlikely because there was a 12 year age difference. However, they are considered a perfect team to solve the structure since James Watson has a strong background in biology, while Francis Crick is an expert in x-ray crystallography.
3. Other researchers also racing to find the structure include;
Rosalind Franklin, and Linus Pauling.4. It is important to note that the data provided by Rosalind Franklin enabled Watson and Crick to better understand the chains that make up the DNA.
5. In the year, 1962 they were awarded the Nobel prize in Physiology and Medicine. They were only three recipients because at the time they were the only living early contributors to the study of the DNA.
Structure of the DNA.
DNA is a molecule that is made by the combination of the two poly chains that coils to each other forming a double helix having genetic matter. James Watson is an American molecular biologist and a geneticist. Hence has done a study on the DNA.
Thus the answer is Watson was curious about DNA, Francis was an expert in X-ray crystallography, Franklin, and Linus Pauling. found this structure. In 1962 Nobel prize was given.
The output of the blurry picture of the DNA eye made by a scientist, M. Wilkins, gave a glimpse of the DNA and the James Watson to stud DNA, The Pairs seemed to be unlikely as there was a 12 year age difference. James Watson was strong in biology when Crick was an expert in x-ray crystallography.Other researchers who were discovering the structure include the Rosalind and the Linus Pauling. Their data abled Watson to better explain the DNA.In the year, 1962 they were awarded the Nobel prize in Physiology and Medicine.Learn more about the solve the structure.
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Help!!
Which set of Earth components is arranged in order from solid to liquid to gas?
hydrosphere, atmosphere, lithosphere
hydrosphere, lithosphere, atmosphere
lithosphere, atmosphere, hydrosphere
lithosphere, hydrosphere, atmosphere
Answers
Answer:
Lithosphere, Hydrosphere, atmosphere
The set of Earth components that is arranged in order from solid to liquid to gas is D. lithosphere, hydrosphere, atmosphere
Lithosphere refers to the solid, outer part of the Earth. It is also known as the Rocky part of the Earth. It consists of the top part of the upper mantle and the brittle crust.Hydrosphere simply refers to the water on the Earth, underground and those that are in the air. This can be seen in ocean, seas, rivers, etc.Atmosphere refers to the layers of gases that can be found on Earth.ut contains gases like nitrogen, oxygen, etc.Read related link on:
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A gas occupying 50.0 ml volume in a confined space at 20.0 dc at 50.0 kpa is heated to 40.0 dc. What is the pressure exerted by the gas in the container?
Answers
Answer:The pressure exerted by the gas is 100kPa
Explanation:Let's apply the Charles Gay Lussac law, to solve the question.
At constant volume, the pressure varies proportionally with the temperature.
P initial / T° initial = P final / T° final
50kPa / 20°C = P final / 40°C
Temperature has increased the double, so the pressure will be increased, the double too.
100 kPa
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Which form of energy does a car's engine convert into mechanical energy?
A light
C. chemical
D. gravitational
B. wind
Answers
Pls help me with my chemistry
Answers
Answer: The answer for this question is 1.9 milliliters
Explanation: So the V=Bh and I substituted the v for 19.45 since they gave use the volume and the h for the amount water we have and then I divided in a calculator and 1.925742574 and then I rounded to the nearest tenth and got 1.9 cm^3
Hope this helps :D
Stephan’s mother cuts a twig from a rose bush and plants it in the soil. After a few days, Stephan observes a new plant growing. Which characteristic does the growth of the new plant depict?
Answers
The growth of the new plant depicts the asexual reproduction characteristic. The characteristic that describes the growth of the new plant in Stephan's mother cutting a twig from a rose bush and planting it in the soil is asexual reproduction.
Asexual reproduction is the mode of reproduction by which organisms generate offspring that are identical to the parent's without the fusion of gametes. Asexual reproduction is a type of reproduction in which the offspring is produced from a single parent.
The offspring created are clones of the parent plant, meaning they are identical to the parent.The new plant in Stephan’s mother cutting a twig from a rose bush and planting it in the soil depicts the process of asexual reproduction, which is the ability of a plant to reproduce without seeds. In asexual reproduction, plants can reproduce vegetatively by cloning themselves using their roots, bulbs, or stems.
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Alka was making tea in a kettle. Suddenly she felt intense heat from the puff of steam gushing out of the spout of the kettle. She wondered whether the temperature of the steam was higher than that of the water boiling in the kettle. Comment. (2)
Answers
It is likely that the temperature of the steam is higher than the temperature of the water boiling in the kettle. The intense heat felt by Alka from the puff of steam supports this observation.
In general, the temperature of steam produced from boiling water is higher than the temperature of the water itself. When water boils, it undergoes a phase change from a liquid to a gas, forming steam.
During this phase change, the water absorbs heat energy from the heat source, such as a stove or electric kettle, and converts it into the latent heat of vaporization.
The boiling point of water is 100 degrees Celsius (212 degrees Fahrenheit) at standard atmospheric pressure. At this temperature, the water molecules have enough energy to overcome the intermolecular forces and transition into the gaseous state.
However, steam is hotter than the boiling point of water because it contains additional heat energy in the form of latent heat. The heat energy absorbed during vaporization is stored as latent heat within the steam. As the steam gushes out of the spout of the kettle, it releases this latent heat energy, which can be felt as intense heat.
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The diagram shows a ball falling toward Earth in a vacuum.
Change in v = 9.8 m/s2 x t.
v=0 m/s
Time (s) o
1 -
2
3
What is the velocity of the ball at 2 seconds?
A. 19.6 m/s2
B. 29.4 m/s2
C. 39.2 m/s2
D. 9.8 m/s2
Answers
Answer:
The answer is 29.4
I just did it
Explanation:
Suppose a solution has a density of 1.87 g/mL. If a sample has a mass of 17.5 g the volume of the sample in mL is what?
Answers
We can use the formula:
Density = Mass/Volume
Rearranging the formula gives:
Volume = Mass/Density
Substituting the given values gives:
Volume = 17.5 g / 1.87 g/mL = 9.36 mL.
14. What two atoms are needed to make rust?
air and water or iron and oxygen
Answers
Answer:
iron and oxygen
Explanation:
air and water are not atoms.
The atomic number tells the number of
Answers
A pharmacist needs to make a 25.0 liter of a 3.50 M solution of a substance. The stock solution of the substance is 10.5 M. How much stock and water must be mixed?
1.47 liters of stock and 16.67 liters of water
8.33 liters of stock and 16.67 liters of water
1.47 liters of stock and 25.0 liters of water
8.33 liters of stock and 25.0 liters of water
Answers
The correct answer is option (b): 8.33 liters of stock and 16.67 liters of water. . The remaining volume will be filled with water, which is 25.0 L - 8.33 L = 16.67 L.
What is Solution?
A solution is a homogeneous mixture composed of two or more substances, where one substance (the solute) is uniformly dispersed in another substance (the solvent) at the molecular or ionic level. In a solution, the particles of the solute are evenly distributed throughout the solvent, resulting in a clear and uniform mixture.
To make a 25.0 liter solution of 3.50 M concentration, using a stock solution of 10.5 M, we can use the dilution formula:
\(C_{1}\) \(V_{1}\)=\(C_{2}\)\(V_{2\)
\(C_{1}\) = 10.5 M
\(V_{1}\) = volume of stock solution (unknown)
\(C_{2}\) = 3.50 M
\(V_{2\) = 25.0 L
Rearranging the formula to solve for \(V_{1\):
\(V_{1}\) = (\(C_{2}\)\(V_{2\)) / \(C_{1}\)
\(V_{1}\)= (3.50 M)(25.0 L) / 10.5 M
\(V_{1}\)= 8.33 L
So, the pharmacist needs to mix 8.33 liters of the 10.5 M stock solution with water to make a 25.0 liter solution of 3.50 M concentration. The remaining volume will be filled with water, which is 25.0 L - 8.33 L = 16.67 L.
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