The fundamental frequency of sound in helium if the pipe is filled with it at the same temperature will be 766.13 Hertz.
A certain organ pipe which is open at both the ends, produces a fundamental frequency equal to 285 Hz in air. It can be considered that the length of the pipe is L. Its wavelength will be represented as:
λ = 2L -- (eq 1)
The frequency of sound will be given as
f = v / λ, where f is the frequency, v is the velocity of sound in air and λ is the wavelength. Replacing the value of λ from equation 1.
285 = 331.29/ 2L
L = 0.5812 m
Let us assume that v' is the velocity of sound in helium. Then,
v/v' = [tex]\sqrt{m'}[/tex]/[tex]\sqrt{m}[/tex] , where, m is the molar mass of air and m' is the molar mass of helium.
v' = 331.29/ 0.372
v' = 890.56 m/s
To calculate the fundamental frequency of sound is helium,
f' = v' / λ
f' = 890.56 / 2 × 0.5812
f' = 766.13 hertz
So, the fundamental frequency of sound is helium is 766.13 hertz.
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a physical change is : a. souring of milk b. burning of gasoline c. rusting of iron d. fermentation of sugar forming alcohol e. condensation of steam
Physical changes occur in dairy products when water is simply evaporated from milk (powdered milk and sweetened condensed milk).
What is physical change?
A physical change is a change to the physical—as opposed to chemical—properties of a substance. They are usually reversible. The physical properties of a substance include such characteristics as shape (volume and size), color, texture, flexibility, density, and mass.A change in which a substance undergoes a change in its physical properties is called a physical change. A physical change is generally reversible. In such a change no new substance is formed.Physical change is a type of change where the physical properties of matter change. A change of state of matter, change in colour, odour, solubility, etc. all are examples of physical change. During a physical change, neither the composition nor the chemical nature of matter is changed.To learn more about physical change refers to;
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1. How many atoms of oxygen are present in 0. 04 mole NaNO3?
2. How many moles of nitrogen atoms are present in 10. 5g of N2O5?
3. How many atoms of oxygen are present in 50g of Fe(H20)2(S04)3? Please answer fast
0.12 atoms of oxygen are present in 0. 04 mole NaNO3, 2. 0.097 moles of nitrogen atoms are present in 10. 5g of N2O5, 3. 0.127 atoms of oxygen are present in 50g of Fe(H20)2(S04)3
To find the number of atoms of oxygen present in 0.04 mole NaNO3, you can use the mole ratio from the chemical formula. The formula for NaNO3 is NaNO3, which means that for every 1 mole of NaNO3, there are 3 moles of oxygen atoms. Therefore, 0.04 mole of NaNO3 contains 0.04 mole x 3 atoms/mole = 0.12 atoms of oxygen.
To find the number of moles of nitrogen atoms present in 10.5 g of N2O5, you can use the molar mass and the molar ratio from the chemical formula. The molar mass of N2O5 is 108 g/mol, and the formula for N2O5 is N2O5, which means that for every 1 mole of N2O5, there are 2 moles of nitrogen atoms. Therefore, 10.5 g of N2O5 contains 10.5 g / 108 g/mol = 0.097 moles of nitrogen atoms.
To find the number of atoms of oxygen present in 50 g of Fe(H2O)2(SO4)3, you can use the molar mass and the molar ratio from the chemical formula. The molar mass of Fe(H2O)2(SO4)3 is 392.18 g/mol, and the formula for Fe(H2O)2(SO4)3 is Fe2(SO4)3.6H2O, which means that for every 1 mole of Fe(H2O)2(SO4)3, there are 6 moles of oxygen atoms. Therefore, 50 g of Fe(H2O)2(SO4)3 contains 50 g / 392.18 g/mol = 0.127 moles of oxygen atoms
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What is the name of this molecule?
Answer:
D). 2-Butyne
Explanation:
The "yne" indicates a triple bond. The "2-" says it starts on the second carbon,
krypton has a higher melting point than argon because of its group of answer choices ionic bonds. greater ionization energy. stronger dispersion forces. permanent dipole moment. hydrogen bonding.
Krypton has higher melting pointthen argon because of its stronger dispersion forces for iasondue to increase in atomic mass inter atomic attraction in these elements is only due to wekdispersion interactions. Answer for this problem is stronger dispersion forces.
The London dispersion force can be defined as a temporary attractive force due to the formation of a temporary dipole in nonpolar molecules. When the electrons of two adjacent atoms move so that the atoms momentarily become dipoles, they are attracted to each other by the London dispersion force.
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30 grams of MgCl2 contains how many moles?
Answer:
Only, 0.315.
Full number: 0.31508964300342
Use the amounts of each product and reactant
listed below to balance the equations for the
reaction between sodium chloride and fluorine.
NaCl + F2 NaF + Cl₂
NaCl = 29.25g F₂ = 9.5g NaF = 21g Cl₂ = 17.75g
As a diatomic molecule, fluorine is represented by (F2). The following balanced chemical equation illustrates how sodium metal and fluorine gas combine to generate sodium fluoride.
F2(g) = 2Na(s) + 2NaF (s).
The symbolic representation of a chemical reaction is a chemical equation. To ensure that the amount of atoms in the reactants and products are equal, a chemical equation must be balanced.
Prior to conducting the synthesis, the chemical equation between the reacting species must be balanced because doing so will enable the reactant to be taken in stiochiometric proportions. The law of conservation of mass is truly satisfied when a chemical reaction is balanced.
A poorly stated or imbalanced chemical equation will undoubtedly have an impact on the synthesis. There are times when the product won't form, and side products will form in its place.
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two ways can scientists exhibit ethical behavior?
Answer:
Creating products that improve people's lives.
Remaining impartial about the data while conducting experiments.
Explanation:
How many moles of CO2 are produced when 3.9 moles of C2H2 burn in oxygen?
The 50 moles of CO2 are produced when 3.9 moles of C2H2 burn in oxygen.
What is moles?
One mole is defined as the quantity of substance that has the same number of chemical species (atoms, molecules, ions, etc.) as those contained in 12 grams of the carbon-12 isotope.
What is oxygen?
Because oxygen contains only one type of atom, it is a chemical element, which is a type of substance. Since oxygen has an atomic number of 8, it is represented by the letter O in its formal chemical formula and has eight protons in its nucleus. In nature, molecular oxygen can be discovered.
2C2H2(g) + 5O2(g) ==> 4CO2(g) + 2H2O(g)
Next, look at the stoichiometric ratio of C2H2 to CO2. You can see it is 2 moles C2H2 produces 4 moles CO2.
Thus, 25.0 moles C2H2 x 4 moles CO2/2 moles C2H4 = 50.0 moles CO2
Therefore, 50 moles of CO2 are produced when 3.9 moles of C2H2 burn in oxygen.
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A gas balloon has a volume of 732mL when the temperature is 45.0 °C and the pressure is 740.0
mm of mercury.
a) What will its volume be at SATP?
Answer:
The final volume will be 44.69 L
Initial volume V₁ = 106.0 L
Initial pressure P₁ = 740.0 mm of Hg
Initial temperature T₁ = 45.0⁰C
Final pressure P₂ = 780.0 mm of Hg
Final temperature T₂ = 20.0⁰C
It is required to calculate the final volume V₂
Gather data: experiment with a variety of initial partial pressure of no, no2, and n2o3. For each set of initial partial pressures, use the gizmo to determine the equilibrium partial pressures of each gas. Run three trials for each set of initial conditions. Use the data you collect to fill in the first four columns of the table. (note that some no2 molecules combine to form n2o4, so there may be less free no2 than no) I don’t quite understand what it’s asking, so some clarification would be nice
The task is asking you to conduct experiments to determine the equilibrium concentrations of the gases NO, NO2, and N2O3 .
Specifically, you are to vary the initial partial pressures (or concentrations) of the gases and use a gizmo (presumably some sort of laboratory instrument) to measure the equilibrium partial pressures of each gas. You should conduct three trials for each set of initial conditions and record the data in a table with four columns: the initial partial pressures of NO, NO2, and N2O3 and the equilibrium partial pressures of NO, NO2, and N2O3. It is important to note that some NO2 molecules may combine to form N2O4, so there may be less free NO2 than NO at equilibrium. This experiment is designed to study the equilibrium of the reaction: 2NO(g) + 2NO2(g) <-> 2N2O4(g); The task is asking you to study the effect of the initial concentrations of each reactant on the equilibrium concentrations of each product. The data you collect should be useful in understanding the reaction kinetics and the thermodynamics of the system.
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Oxidation-Reduction and balancing through ion electron method. Answer choices on bottom. Can someone explain this problem how they got their answer? I having a hard time understanding oxidation and reduction reactions
The balanced equation of the redox reaction using the ion-electron method is:
3 Hg + 8 HNO₃ → 3 Hg(NO₃)₂ + 2 NO + 4 H₂O
The correct option is D.
What is a redox reaction?Redox reactions include a change in the oxidation state of the substrate. When oxidation occurs, electrons are lost, or the oxidation state increases. When a reduction occurs, electrons are gained or the oxidation state decreases.
The balanced equation of the redox reaction using the ion-electron method is given below as follows:
Hg + HNO₃ → Hg(NO₃)₂ + NO + H₂O
Hg⁰ is oxidized to Hg²⁺ by the loss of two electrons
N⁵⁺ is reduced to N²⁺ by a gain of three electrons
To balance electron loss, we add a coefficient of 3 in from of Hg and a coefficient of 8 in front of HNO₃
3 Hg + 8 HNO₃ → 3 Hg(NO₃)₂ + 2 NO + 4 H₂O
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Explain how a chemical reaction between molecules of baking soda and molecules of citric acid could have produced some new water molecules?
The way a chemical reaction between baking soda and citric acid can produce new water molecules is that they can react together to produce new compounds, including water.
How can baking soda and citric acid react ?When baking soda and citric acid are mixed together in water, they undergo a chemical reaction known as a neutralization reaction. In this type of reaction, an acid (citric acid) reacts with a base (baking soda) to form a salt (sodium citrate) and water.
In the case of baking soda and citric acid, the reaction is exothermic, meaning that it releases heat. This heat can cause the water molecules to move faster, leading to the formation of bubbles of carbon dioxide gas, which is the fizzing you observe when baking soda and citric acid are mixed together.
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The table below shows the time and distance of a moving car. What is the average speed of the car for the 10 minutes, expressed in meters per minute? In kilometers per hour? if u can pls put an explanation bc my teacher is rlly strict on that
The average speed of the car would be:
512 meters per minute30.12 km/hWhat is the average speed?The average speed of a moving object is the ratio of the total distance traveled by the object and the total time taken to cover the distance traveled.
The average speed can be mathematically expressed as:
Average speed = total distance/total time
From the graph, the total distance traveled by the car can be estimated as:
4800 + 320 = 5120 m
Total time = 10 minutes
Average speed of the car = 5120/10 = 512 meters per minute
5120 meters = 5120/1000 = 5.12 kilometers
10 minutes = 10/60 = 0.17 hour
Average speed of the car in kilometers per hour = 5.12/0.17 = 30.12 km/h
In other words, the average speed of the moving car in meters per minute is 512, while the speed in kilometers per hour is 30.12.
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how does thermal energy play a role in the carbon????
PLEASE HELP!!!!!
Answer:
Thermal energy plays a role in the carbon cycle by driving the process of photosynthesis in plants and other organisms. During photosynthesis, plants take in carbon dioxide from the atmosphere and convert it into organic compounds, such as glucose, using the energy from sunlight. This process also releases oxygen back into the atmosphere.
Thermal energy also plays a role in the carbon cycle by driving the process of respiration in plants and animals. During respiration, compounds are broken down to release energy, which is used by the organism. This process also releases carbon dioxide back into the atmosphere.
Explanation:
Do you feel that Paul Feyerabend’s belief falls more into a modernism or postmodernism method of thinking?
Yes Paul feyerabend falls more under postmodernism rather than modernism.
Paul feyerabend is considered a postmodernist philosopher of science. He is known for his critiques of the scientific method and the idea that there is a single "correct" way to do science. He argued that science is not a rational or objective enterprise, but is instead shaped by social and cultural factors. Feyerabend's views align more with postmodernism, which emphasizes the importance of context and subjectivity in understanding knowledge and reality.
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an advantage of recycling aluminum rather than disposing of it in landfills is that aluminum can be
Answer:
Recycling aluminium uses 95% less energy than producing aluminium from raw materials like bauxite ore and it conserves energy and reduces air pollution and water pollution as well as reducing green house effects and conserving the natural resources. So the pros of recycling aluminum much out weigh the cons.
What happens as water freezes?
OA. The attractions between water molecules hold them in place in a
crystal lattice.
OB. The attractions between water molecules weaken and the crystal
lattice breaks apart.
OC. The water molecules slow down until all molecular motion stops.
OD. The water molecules slow down and move closer together.
When water freezes, the attractions between water molecules weaken and the crystal lattice breaks apart.
What is water molecules?Water molecules are the molecules which make up water. A water molecule consists of two hydrogen atoms bonded to a single oxygen atom, with the chemical formula H2O. The strong covalent bonds between the hydrogen and oxygen atoms give water many of its unique properties, such as its ability to dissolve many substances, its high surface tension, and its ability to absorb and release large amounts of heat energy.
As the temperature drops, the water molecules slow down and move closer together, forming a crystalline structure. As the temperature continues to decrease, the attractions between water molecules hold them in place in a crystal lattice, and all molecular motion stops.
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0. 125L of a 0. 075 M HBr solution is used to neutralize 0. 0350L of an unknown Sn(OH)2
solution. What is the molarity of the unknown Sn(OH)2 solution?
please help
To neutralize 0.0350L of an unidentified Sn(OH)2 solution, 0.125L of a 0.075 M HBr solution is utilized. The molarity of the unknown Sn(OH)2 solution is 0.268 M.
The neutralization reaction between HBr and Sn(OH)2 is as follows:
HBr + Sn(OH)2 ---> SnBr2 + 2H2O
We can use the balanced equation and the stoichiometry of the reaction to find the molarity of the unknown Sn(OH)2 solution.
From the balanced equation, we can see that for every 1 mole of HBr, 1 mole of Sn(OH)2 is consumed.
We know that the HBr solution is 0.125L and 0.075M, so the number of moles of HBr is 0.125L x 0.075M = 0.00937 moles.
Since the number of moles of HBr is equal to the number of moles of Sn(OH)2, we can use the same number of moles to find the molarity of the unknown Sn(OH)2 solution.
The quantity of solute molecules per liter of solution is known as a solution's molarity. Therefore,
Molarity of unknown Sn(OH)2 solution = moles of solute / liters of solution
Molarity = 0.00937moles / 0.0350L = 0.268 M
Therefore, the molarity of the unknown Sn(OH)2 solution is 0.268 M.
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calcium reacts with sulfur forming calcium sulfide. what is the theoretical yield (g) of cas(s) that could be prepared from 7.72 g of ca(s) and 2.04 g of sulfur(s)?
Theoretically, 7.72 g containing ca(s) as well as 2.04 g of even more sulfur may be combined to produce 2.88 g of cas(s) (s).
Describe sulfur.Among the most rectifiers is sulfur (S), sometimes spelt as sulfur, a nonmetallic chemical element in the oxygenation member (Group 16 [VIa] of the atomic numbers). Natural sulfur is a pale yellow substance that is brittle, flavorless, and odorless.
Where can you find sulfur?Sulfur can be found naturally and now in metal bauxite ore. Natively, it can be found close to hot springs and volcanoes. The tenth most prevalent element, selenium is found in asteroids, the ocean, the crust of the earth, and the atmosphere.
balanced equation,
Ca + S ---> CaS
stoichiometry of Ca to S is 1:1
= Ca moles - 1.6 g/ 40 g/mol
= 0.04 mol
= S moles - 4.25 g / 32 g/mol
= 0.13 mol
stoichiometry of Ca to CaS is 1:1,
= CaS moles formed - 0.04 mol
= mass of CaS - 0.04 mol x 72 g/mol
theoretical yield = 2.88 g
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why is it important to tap the side of the eudiometer tube before reading the volume of gas collected
It is important to tap the side of the eudiometer tube before reading the volume of gas collected because it helps to settle any bubbles that may be present in the gas sample.
Bubbles can form in the gas sample during the collection process, for example due to temperature or pressure changes, and can cause inaccuracies in the measurement of the volume of gas. If bubbles are present when the volume of gas is measured, it can lead to overestimation of the volume of gas collected. By tapping the side of the eudiometer tube, the bubbles will rise to the top and can be removed by opening the tube or by releasing the pressure. This will ensure that the volume of gas measured is an accurate representation of the amount of gas that was collected, and not affected by the presence of bubbles. This is important for obtaining precise and accurate results in experiments that use eudiometer tubes.
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___Cr3+ + ___O2 ----> ___Cr2O3
Answer:
Explanation:
2 Cr3+ + 3/2 O2 -----> Cr2O3
The initial concentration of [PCl3], [Cl2] and [PCl5] in a reaction vessel are 0.485M, 0.261M, and 0.399M respectively. KC= 0.500. calculate the equilibrium concentration of [cl2].
Answer:C12: 0.487 m
Explanation:
California, a city that is far inland, such as Sacramento, is typically warmer than a city near the coast, such as San Francisco agree or disagree
Answer:
correct
Explanation:
I agree that California cities that are farther inland, such as Sacramento, are typically warmer than those that are near the coast, such as San Francisco. This is because the coast has a cooling effect due to the ocean breeze and the proximity to the ocean, which helps to moderate temperatures. Inland areas, on the other hand, are farther from these cooling influences and can experience higher temperatures, especially during the summer months
help pls:))!!!!!!!!!!
Answer: C
Explanation:
Based on her survey which advertising mediums will work best publicize Leslie’s in the store specials
The correct answer is printed flyers and internet .
Printed flyers and internet are two popular advertising mediums used to promote businesses. Printed flyers can be distributed directly to customers through mail or handed out in public places. This allows for a targeted approach and can be cost-effective, especially if the business is located in a small area. However, printed flyers can easily get lost or discarded, making it difficult to measure their effectiveness.
On the other hand, the internet offers a wider reach and can target a larger audience. Advertisements can be placed on websites, social media platforms, and search engines. This allows for more precise targeting based on demographics and interests. The internet also offers the ability to track and analyze the success of advertising campaigns in real-time, allowing for quick adjustments to be made to improve their effectiveness. However, the cost of internet advertising can be higher than traditional print advertising, and it may require more technical knowledge and resources to create and manage an online advertising campaign.
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Leslie wants to know which advertising medium works best to promote her electronics store. She surveys her customers over a weekend and creates a bar graph. Based on her survey, which advertising mediums will work best to publicize Leslie’s in-store specials?
makes a connection with in chemistry
Knowing how atoms and molecules behave in chemical reactions in chemistry depends on understanding electron transfer processes. The transfer of one or more electrons from one species.
to another occurs in electron transfer reactions, which are closely connected to oxidation-reduction (redox) processes. Atoms' oxidation states change during redox reactions, which are chemical processes. In the process of oxidation, electrons are lost, whereas in the process of reduction, electrons are gained. In a redox reaction, an oxidizing species (the reducing agent) transfers electrons to a species that is being reduced (the oxidizing agent). The term "oxidized" refers to a species that is losing electrons, whereas the term "reduced" refers to a species that is gaining electrons.Several biological activities, including cellular respiration, photosynthesis, and biochemical reactions, depend heavily on electron transfer reactions. They are utilized in a variety of technologies, including electrochemistry, fuel cells, and batteries.
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if a piece of metal has a volume of 0.00670 l and a mass of 60.0 g, what is the density of the rock in g/ml?
If the piece of the metal has the volume of the 0.00670 L and the mass of the 60 g. The density of the rock is 8955.2 g/L.
The mass of the metal = 60 g
The volume of the metal = 0.00670 L
The density is the ration the mass to the volume of the substances .
The density expression is given as :
The Density = mass / volume
Where,
The mass = 60 g
The volume = 0.00670 L
The density = 60 / 0.00670
The density = 8955.2 g/L
Thus the density of the rock is the 8955.2 g/L.
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Which term describes the molecule shown below?
Answer:
C
Explanation:
because i checked it in the periodic table solve it and that's it
HELP PLEASE BOND ENTHALPY WORKSHEET
Bond energy is explained as the energy needed to destroy a bond/link. These values are positive, indicating that bond scission is endothermic.
What is bond energy?Bond energies are typically based on average bond dissociation values for species in the gas phase at a temperature of 298 Kelvin. Bond energy can be determined by measuring and calculating the enthalpy change as the molecule breaks down into atoms and ions and dividing that value by the number of chemical bonds. For example, the enthalpy change in splitting methane (CH4) into one carbon atom and four hydrogen ions divided by the four bonds (number of C-H) gives the bond energy.Bond energy is not always the same as bond separation energy. The bond energy value is the average of the bond dissociation energies within the molecule. Different amounts of energy are required to break subsequent bonds.To learn more about Bond energy from the given link:
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15. why might doubling the number of moles of hcl decrease the rate of hcl production? select the acid convertase enzyme is converting hcl back into h and cl- select cannot be determined select no more h or cl- exists to be converted select the acid convertase enzyme has become inactive
When doubling the number of the moles of the HCl decrease the rate of HCl production because the acid convertase enzyme is converting HCl back into H⁺ and Cl⁻.
The reaction is as follows :
H⁺ + Cl⁻ ⇄ HCl
If we double the number of the moles of the HCl , it decreases the rate of the HCl production because of the reason that the acid convertase enzyme is converting the HCl back into the H⁺ and Cl⁻. The purpose of the enzyme is to allow the conversion of the reactant to the product and the product back to the reactant
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