Illustrating Mechanical Waves

TASK: Create a collage to describe and illustrate how a medium may move and transfer energy in a transverse and compressional/longitudinal wave.


Mechanical waves are waves that transfer energy through a medium (matter). The medium can be a solid, liquid or a gas. A medium in a mechanical wave can move transversely , in a surface wave or Longitudinally. Illustrate the medium movement in a transverse wave and in a compression wave. Below is a checklist/guide for how you will be evaluated for this task.

Illustrate a transverse wave that progressively changes with at least 3 distinguishable

properties: Maximum Points: 60

Labels the crest and the trough.

Labels a point at which the energy of the wave is high.

Labels a point at which the energy of the wave is low.

Label the amplitude, wavelength and identify the frequency of the wave

Draw an arrow to indicate the direction that the medium moves.

Draw an arrow to indicate the direction that the wave moves.

Provides description of your wave in terms of wavelength (long, short), frequency (high, low and the amount in Hertz-Hz) amplitude (high, low)

Identify a measured wavelength and amplitude.

Lastly, have a title and the definition of a transverse wave.

YOU MUST HAVE THE FOLLOWING: 5 points each

Uses color.

Uses a color coded system.

Provides a legend/key for the illustration.


Illustration of a Longitudinal/Compressional Wave that changes in energy

Maximum Points 40

Labels the compressions.

Labels the rarefactions.

Identify the point at which the energy of the wave is high.

Identify the point at which the energy of the wave is low.

Draws an arrow to indicate the direction that the medium moves.

Draws an arrow to indicate the direction that the wave moves.

Lastly, have a title and the definition of a compressional/longitudinal wave.

YOU MUST HAVE THE FOLLOWING: 5 points each

Uses color.

Uses a color coded system.

Provides a legend/key for the illustration.

1. The concentration of a solution containing 4.63 g of sodium chloride in enough water to make 1 litre of solution is 0.00463 moles per litre.

Chloride is an essential mineral that plays a key role in the functioning of the human body. It is found naturally in several different forms, including chloride ions, chloride salts, and chloride compounds. Chloride is a major component of the body's extracellular fluid and helps to regulate the body's acid-base balance and maintain hydration.

2. The concentration of a solution containing 7.99 g of sodium sulfate in enough water to make 1 litre of solution is 0.00799 moles per litre.

3. The concentration of a solution containing 8.094 g of sodium carbonate in enough water to make 500 ml of solution is 0.01619 moles per litre.

4. The concentration of a solution containing 9.478 g of rubidium chloride in enough water to make 1 litre of solution is 0.009478 moles per litre.

5. The concentration of a solution containing 72.06 g of barium chloride in enough water to make 800 ml of solution is 0.09008 moles per litre.

6. The concentration of a solution containing 11.522 g of potassium hydemide in enough water to make 350 ml of solution is 0.06613 moles per litre.

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An element might have a negative oxidation number due to the following reasons:

1. The element has a greater affinity for electrons, meaning it tends to gain electrons in a chemical reaction. When an element gains electrons, it acquires a negative charge, resulting in a negative oxidation number.

2. The element is found in a compound where it is bonded to a more electronegative element. In such cases, the more electronegative element attracts the shared electrons towards itself, leading to a negative oxidation number for the less electronegative element.

In summary, an element might have a negative oxidation number when it has a greater affinity for electrons and/or is bonded to a more electronegative element in a compound.

For example, in the reaction between magnesium and chlorine to form magnesium chloride, magnesium has an oxidation number of +2 while chlorine has an oxidation number of -1. This shows that chlorine gained an electron and became more negatively charged, resulting in a negative oxidation number.

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There are approximately 12.7 grams of phosphorus in a 50-gram sample of aluminum phosphate.

To determine the number of grams of phosphorus in a 50-gram sample of aluminum phosphate, we need to know the molar mass and the chemical formula of aluminum phosphate.

The chemical formula for aluminum phosphate is AlPO4. It indicates that each molecule of aluminum phosphate contains one aluminum atom (Al), one phosphorus atom (P), and four oxygen atoms (O).

To calculate the molar mass of aluminum phosphate, we can add up the atomic masses of its constituent elements based on their stoichiometric ratios:

Molar mass of AlPO4 = (molar mass of Al) + (molar mass of P) + (4 * molar mass of O)

Using the periodic table, we can find the atomic masses of the elements:

Molar mass of Al = 26.98 g/mol

Molar mass of P = 30.97 g/mol

Molar mass of O = 16.00 g/mol

Now, let's calculate the molar mass of aluminum phosphate:

Molar mass of AlPO4 = (26.98 g/mol) + (30.97 g/mol) + (4 * 16.00 g/mol)

= 121.95 g/mol

The molar mass of aluminum phosphate is 121.95 g/mol.

To determine the number of grams of phosphorus in a 50-gram sample of aluminum phosphate, we need to calculate the mass fraction of phosphorus in the compound. The mass fraction is the ratio of the molar mass of phosphorus to the molar mass of aluminum phosphate.

Mass fraction of phosphorus = (molar mass of P) / (molar mass of AlPO4)

= (30.97 g/mol) / (121.95 g/mol)

≈ 0.254

Multiplying the mass fraction by the mass of the sample gives us the grams of phosphorus:

Grams of phosphorus = (mass fraction of phosphorus) * (mass of the sample)

= 0.254 * 50 g

≈ 12.7 g

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The correct choice is A) −5Δ[Br−]/Δt. The rate expressed as Δ[Br2]/Δt is proportional to -5 times the rate of change of Br−.

In the given reaction 5Br−(aq) + BrO3−(aq) + 6H+(aq) → 3Br2(aq) + 3H2O(aq), the stoichiometric coefficients provide information about the relationship between the reactants and products. To determine the rate expressed as Δ[Br2]/Δt, we need to compare it with the rate of change of the other species.

Based on the balanced equation, for every 5 moles of Br− consumed, 3 moles of Br2 are produced. Therefore, the rate of change of Br−, Δ[Br−]/Δt, is related to the rate of change of Br2, Δ[Br2]/Δt, by a factor of -5/3.

The other choices, B) −0.6Δ[Br−]/Δt, C) 3Δ[BrO3−]/Δt, and D) −Δ[H2O]/Δt, do not correspond to the correct relationship based on the stoichiometric coefficients of the reaction. Therefore, the correct answer is A) −5Δ[Br−]/Δt.

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Answer:

5

Explanation:

An ion has a net charge of 3+

ion has 8 protons

How many electrons does it have

A neutral atom has equal number of electrons and protons.

If a neutral atom loses electron it acquires a positive charge.

So to acquire 3+ charge the atom must have lost three electrons.

So the number of protons exceeds the number of electrons by 3.

Answer:

D.

Explanation:

The electron cloud has negligible mass. Most mass come from the nucleus.

So,

We want to draw a graph of the melting and boiling points of the elements of the periodic table against the atomic number of each of them.

For this, remember that the metals have properties that makes them have a greater melting and boiling points.

Let me upload the graph here below:

As you can see, the melting temperature of the first six atomic numbers is increasing until we finish in 7. It depends of the characteristic of the element.

If you look at your periodic table, the graph will be something like I posted above.

When ice is placed in a beaker and heated up slowly at a constant heat while being stirred thoroughly, it undergoes a phase change from solid to liquid, and the temperature remains constant during the melting process due to the energy being used to overcome intermolecular forces.

When ice is placed in a beaker and heated up slowly at a constant heat while being stirred thoroughly, it undergoes a phase change from solid to liquid. This process is known as melting and requires the absorption of energy, which is supplied by the heat source. As the ice melts, its temperature remains constant until all the ice has melted, after which the temperature of the water starts to increase.
The reason why the temperature of the melting ice remains constant during the phase change is due to the energy being used to overcome the intermolecular forces that hold the water molecules together in a solid crystal lattice. Once these forces are overcome, the energy supplied by the heat source can be used to increase the kinetic energy of the water molecules and raise their temperature.
It is important to heat the ice slowly and constantly while stirring thoroughly to ensure that the heat is evenly distributed throughout the beaker and that the ice melts uniformly. Rapid heating or uneven heating can cause the ice to melt unevenly, leading to the formation of water pockets and potential safety hazards.
In conclusion, when ice is placed in a beaker and heated up slowly at a constant heat while being stirred thoroughly, it undergoes a phase change from solid to liquid, and the temperature remains constant during the melting process due to the energy being used to overcome intermolecular forces.

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Out of the given group of answer choices, the reversible reaction is the reduction by sodium borohydride. Sodium borohydride is a commonly used reducing agent in organic chemistry, particularly for the reduction of carbonyl compounds.

The reduction by sodium borohydride involves the transfer of hydride ions from the boron atom to the carbonyl carbon, resulting in the formation of an alkoxide intermediate. This intermediate can then either undergo protonation to yield the reduced product or revert back to the carbonyl compound through hydrolysis.

Hence, the reaction is reversible. On the other hand, the reduction by l-selectride, aluminum isopropoxide, and other reducing agents is typically irreversible and does not involve the formation of any intermediate that can undergo hydrolysis to regenerate the starting material.

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Answer:

Visit: gotit-pro.com

Explanation:

Answer:

C₃H₆ + H₂O = C₃H₈O

Explanation:

Hydration reactions (reactions involving converting an alkene to alcohol) have only one product, so there will be no byproduct along with propanol.

Propene reacts with steam to produce propan-2-ol. The reaction is C₃H₆ +H₂O\(\rightarrow\)C₃H₈O. It is an example of hydration reaction.

Hydration reaction is defined as a chemical reaction wherein a substance combines with water. In organic chemistry, when an unsaturated substance reacts with water it is called as hydration reactions.

The reaction involves breaking of hydroxyl bond in water which is highly  exothermic releasing large amount of energy. Direct addition of water to an alkene is too slow and hence the rate is catalyzed by Lewis acids or Bronsted acids.

Hydration reactions are extensively used   for industrial production of butanol and isopropanol,etc.The addition of water along the double bond in alkenes takes place according to Markovnikov's rule.

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The release of lead from leaded gasoline combustion is a significant health and environmental hazard.

The arrival of lead high up because of the burning of leaded fuel can bring about a huge natural risk. Lead is a weighty metal that is exceptionally poisonous to people and creatures, and can cause serious medical conditions even at low openness levels. At the point when lead enters the environment, it tends to be breathed in or ingested by people and creatures, prompting a scope of unfriendly wellbeing impacts, including neurological harm, formative postponements, pallor, and kidney harm. Lead can likewise sully soil and water, prompting further openness and ecological defilement. Consequently, the arrival of lead from leaded gas ignition is viewed as a huge wellbeing danger and natural danger.

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Lead released into the air due to the combustion of leaded gasoline in vehicle engines prior to its phaseout in the 1970s would be classified as an environmental hazard. Specifically, it is a form of air pollution that posed significant risks to public health, as exposure to lead can cause various health issues, particularly in children.

The release of lead into the air from vehicle engines combusting leaded gasoline prior to the 1970s phaseout would be considered an environmental hazard. This is because lead is a heavy metal that is toxic to living organisms, including humans, and can have negative effects on the environment and public health. The release of lead into the air can result in air pollution, which can have a range of negative impacts on human health, such as respiratory problems, neurological damage, and developmental issues in children. Additionally, lead can contaminate soil and water, leading to further environmental hazards.

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Answer:b

Explanation:

The chemical element that gives the blood of a lobster a bluish tint is copper.

The blue color of lobster blood is due to a copper-based molecule called hemocyanin. Hemocyanin serves a similar function to hemoglobin in vertebrates, which is to transport oxygen to the tissues.

In vertebrates, hemoglobin contains iron atoms that bind to oxygen, giving the blood a red color when oxygenated. However, crustaceans like lobsters have evolved a different mechanism for oxygen transport. Instead of using iron, they use copper to bind with oxygen molecules.

Hemocyanin molecules consist of protein chains called subunits, each containing copper atoms. When oxygen is present, it binds to the copper atoms in hemocyanin, forming a complex called oxyhemocyanin. This oxyhemocyanin complex gives the lobster blood a blue color.

The blue tint arises because copper absorbs light in the red part of the spectrum and reflects or transmits light in the blue region. This interaction between light and the copper-based molecule results in the characteristic bluish color of lobster blood.

Overall, the presence of copper in the hemocyanin molecule is responsible for the blue tint observed in the blood of lobsters and other crustaceans, allowing them to efficiently transport oxygen throughout their bodies in an oxygen-rich aquatic environment.

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The surface area of the statute covered with the gold is 9,627.32 m².

Volume is a scalar quantity expressing the amount of three-dimensional space enclosed by a closed surface.

The volume of the statute covered with gold is calculated as follows;

Volume = mass/density

Volume = (279 kg) / (19,320 kg/m³)

Volume = 0.0144 m³

The surface area of a solid object is a measure of the total area that the surface of the object occupies.

V = S.A x h

where;

S.A = V/h

S.A = (0.0144) / (0.0015 x 10⁻³)

S.A = 9,627.32 m²

Thus, the surface area of the statute covered with the gold is 9,627.32 m².

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Answer:

Gap 1, S-Phase, Gap 2, Prophase, Metaphase, Anaphase, Telophase, Cytokinesis

Hope this helps.

Answer: 89.7 L

Explanation:

89.6 volume, in liters, does 128 grams of O2 occupy at STP. Therefore, option A is correct.

A volume is simply the amount of space taken up by any three-dimensional solid. A cube, a cuboid, a cone, a cylinder, or a sphere are examples of solids. Volumes differ depending on the shape.

Every three-dimensional object requires some amount of space. The volume of this space is measured. Volume is defined as the space occupied by an object within the boundaries of three-dimensional space. It is also known as the object's capacity.

1 mole Oxygen has mass 32 grams

Mole of Oxygen in 128 g mass = 128 g / 32 g/mol

= 4.0 mol O2

At Standard temperature and pressure this has volume

= 4.0 mol × 22.4 L/mol

= 89.6 L

Thus, 89.6 volume, in liters, does 128 grams of O2 occupy at STP, option A is correct.

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Explanation:

yes its hard if you don't pay attention.

Yes, the math is harder but chemistry is not it's really fun the math does get harder tho.

Answer:

reactants

Explanation:

The substances that go into a chemical reaction are called the reactants, and the substances produced at the end of the reaction are known as the products.

STP, or standard temperature and pressure, refers to the nominal atmospheric conditions at sea level. The temperatures and pressures are 0 degrees Celsius and 1 atmosphere, respectively. The mass of HCl at STP is 0.40 g.

The molar volume (Vm) is the volume occupied by one mole of a chemical element or chemical compound at standard temperature and pressure (STP). You may figure it out by dividing the mass density by the molar mass.

A mole (6.022 × 10²³ typical particles) of any gas takes up 22.4L at STP. The expression used to calculate the number of moles at STP is:

n = V₀ in L / 22.414

250cm³ = 0.25 L

n = 0.25 / 22.414

n = 0.0111

The molar mass of HCl = 36.45 g/mol

n = Mass/ molar mass

mass = n × molar mass

mass = 0.0111 × 36.45

mass = 0.40 g

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For the reaction of lead(II) nitrate with potassium chloride, the balanced full ionic equation is Pb(NO3)2(aq) + 2 KCl(aq) PbCl2(s) + 2 KNO3 PbCl2(s) + 2 KNO3 (aq) To formulate the whole ionic equation.

we divide all soluble ionic compounds into their constituent ions: Pb2+(aq) + 2 NO3-(aq) + 2 K+(aq) + 2 Cl-(aq) PbCl2(s) + 2 K+(aq) + 2 NO3-(aq) + 2 Cl-(aq) (aq) The potassium and nitrate ions are spectator ions, appearing on both sides of the equation but not participating in the process. By deleting the spectator ions, the net ionic equation is obtained: PbCl2 = Pb2+(aq) + 2 Cl-(aq) (s) As a result, the net ionic equation for the reaction is as follows PbCl2 = Pb2+(aq) + 2 Cl-(aq) (s).  the correct balanced complete ionic equation for the reaction of lead(ii) nitrate with potassium chloride.

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Answer:

OB. the nervous system

Explanation:

The Medulla Oblongata helps to regulate important functions such as heartbeat and breathing.

When 23.0 g of C_3H_8O_3is burned during the complete combustion, approximately 0.750 moles of carbon dioxide (CO_2) are produced.

To determine the number of moles of carbon dioxide (CO_2) produced during the complete combustion of C_3H_8O_3, we need to consider the balanced chemical equation for the combustion reaction.

The balanced equation for the complete combustion of C_3H_8O_3(glycerol) is:

C_3H_8O_3+ 5O_2 -> CO_2+ 4H_2O

From the balanced equation, we can see that for every 1 mole of C_3H_8O_3burned, 3 moles of CO_2are produced.

We have:

Mass of C3H8O3 = 23.0 g

First, we need to calculate the number of moles of C3H8O3 using its molar mass.

Molar mass of C3H8O3 = (3 * 12.01 g/mol) + (8 * 1.01 g/mol) + (3 * 16.00 g/mol) = 92.09 g/mol

Number of moles of C3H8O3 = Mass / Molar mass = 23.0 g / 92.09 g/mol ≈ 0.250 mol

Now, we can determine the number of moles of CO_2 produced by multiplying the number of moles of C_3H_8O_3 by the mole ratio from the balanced equation.

Number of moles of CO_2 = 0.250 mol C3H8O3 * (3 mol CO_2 / 1 mol C_3H_8O_3) = 0.750 mol CO_2

Therefore, when 23.0 g of C_3H_8O_3 is burned during the complete combustion, approximately 0.750 moles of carbon dioxide (CO_2) are produced.

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The following units indicate these quantities:

1.  mL- Volume

2. cm^2- Area

3. mm^3- volume

4. mg/L- Concentration

5. ps- Time

6. nm- Length

7. K- Temprature

- mL: This unit indicates volume, specifically the volume of liquid or fluid in milliliters.

- cm^2: This unit indicates area, specifically the area of a two-dimensional object in square centimeters.

- mm^3: This unit indicates volume, specifically the volume of a three-dimensional object in cubic millimeters.

- mg/L: This unit indicates concentration, specifically the concentration of a substance in milligrams per liter of solution.

- ps: This unit indicates time, specifically time measured in picoseconds (one trillionth of a second).

- nm: This unit indicates length, specifically the length of an object in nanometers (one billionth of a meter).

- K: This unit indicates temperature, specifically temperature measured in kelvins, which is a unit of temperature that starts at absolute zero (the coldest possible temperature).

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\(\\ \tt\hookrightarrow C_{15}H_{32}+23O_2\longrightarrow 15CO_2+16H_2O\)

\(\\ \tt\hookrightarrow CO_2+CaO=CaCO_3\)

1) The balanced equation for the combustion of C15H32 (pentadecane) is:

C15H32 + 23O2 → 15CO2 + 16H2O

2) To test for the presence of carbon dioxide (CO2) in the products of the combustion of C15H32, one simple way is to bubble the gas through limewater (aqueous calcium hydroxide solution). When carbon dioxide is passed through limewater, it reacts with the calcium hydroxide to form a white precipitate of calcium carbonate according to the following chemical equation:

Ca(OH)2 + CO2 → CaCO3 + H2O

The formation of a white precipitate indicates the presence of carbon dioxide in the gas. Another way to test for the presence of carbon dioxide is to use a pH indicator, such as universal indicator or litmus paper. When carbon dioxide dissolves in water, it forms a weak acid called carbonic acid. This can be detected by observing a change in the color of the pH indicator. Carbon dioxide will turn universal indicator yellow or litmus paper red, indicating an acidic solution.

Answer:

0.16 mol

Explanation:

you will use the ideal gas law PV=nRT where R is approximately 0.082 atm×L/mol×K

PV=nRT

n=PV/RT

n=0.8×5.2/0.082×315

n=0.16 mol

The value of Δrxn for nitrous acid when [NO−2]=[H3O+]=3.18×10−5 M and [HNO2]=1.457 M is -214.96 kJ/mol.

Given:

HNO2(aq) + H2O(l) ⇌ H3O+(aq) + NO−2(aq)

Ka = 5.6 x 10^-4 M

Δ∘rxn at 25.0 ∘C for nitrous acid is to be calculated when [NO−2]=[H3O+]=[HNO2]=1.00 M.

Using the Ka expression:

Ka = [H3O+][NO−2] / [HNO2]

5.6 x 10^-4 = [1.00]^2 / [1.00]

Therefore,

[H3O+] = [NO−2] = 0.02365 M

To calculate Δ∘rxn:

Δ∘rxn = -2.303RT log Ka

At 25°C, R = 8.314 J/mol K and T = 298 K.

Δ∘rxn = -2.303 x 8.314 x 298 x log (5.6 x 10^-4) kJ/mol

= -21.1 kJ/mol

The value of Δ∘rxn is -21.1 kJ/mol.

Since Δ∘rxn is negative, the acid will spontaneously dissociate under these conditions because the reaction is exothermic and Δ∘rxn is negative, indicating that the reaction is spontaneous.

Now, let's calculate the value of Δrxn for nitrous acid when [NO−2]=[H3O+]=3.18×10−5 M and [HNO2]=1.457 M.

Using the formula:

Δrxn = ΔfH°(H3O+(aq)) + ΔfH°(NO2−(aq)) - ΔfH°(HNO2(aq))

Given values:

ΔfH°(HNO2(aq)) = -56.06 kJ/mol

ΔfH°(H3O+(aq)) = -237.13 kJ/mol

ΔfH°(NO2−(aq)) = 33.89 kJ/mol

Δrxn = -237.13 + 33.89 - (-56.06) kJ/mol

= -214.96 kJ/mol

Therefore, the value of Δrxn for nitrous acid when [NO−2]=[H3O+]=3.18×10−5 M and [HNO2]=1.457 M is -214.96 kJ/mol.

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Answer:-

The chemical symbol for nitrogen is N2 the chemical formula for nitrogen gas is N2

Explanation:-

The chemical formula for nitrogen gas is N2. Nitrogen gas is one of the diatomic elements, in which one molecule consists of two atoms of the same element bonded by one or more covalent bonds.

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Answer: The molecular formula of nitrogen is N2.

Explanation: The atomic number of nitrogen is 7 as it is the 7th element of the periodic table and its molecular weight is 28.
nitrogen (N), a nonmetallic element of Group 15 [Va] of the periodic table. It is a colorless, odorless, tasteless gas that is the most plentiful element in Earth's atmosphere and is a constituent of all living matter.

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