Which of these has the most kinetic energy?

A. a 25 kg fish tank sitting on a table
B. a .05 g fish swimming in a fish tank
C. a 7,500 kg car parked on a steep hill
D. a 50 kg boulder suspended from a cliff

Answer:

1) takes the shape of its container ( liquid and gas).

2) fills all available space (gas)

3) maintains its shape ( solid)

4) can be poured ( liquid)

5) is compressible ( gas)

6) has a fixed volume ( liquid and solid)

Explanation:

Matter is simply defined as anything that has weight and occupies space. It exists in three states, namely: solid, liquid and gaseous states.

The properties of different states of matter includes:

SOLID STATE

--> It has a definite shape: The shape of a solid is fixed; it does not depend on the shape of other materials.

--> It has a definite volume: it occupies its own shape due to the force of cohesion among its molecules.

--> It is tightly packed: The molecular movements of particles are negligible.

LIQUID STATE

--> liquid has a defined volume.

--> it has no definite shape: There is no specific shape of a liquid. It occupies any available space. It's shape depends on the shape of the container into which it is poured.

GASEOUS STATE

--> it has no fixed shape: Due to the distance in the molecules of gas, the gaseous state has no shape. It occupies the shape of its container.

--> It has no fixed volume: it occupies the shape of any container that is closed.

--> It is highly compressible: The particles of gas are far off from one another and there is room for collision.

Answer:

Copper conducts heat well- physical

Alcohol has a sweet door- physical

Explanation:

Answer:

a, a

Explanation:

Answer:

Composition: All hydrocarbons are made up of only two types of atoms: carbon and hydrogen. They are like building blocks that contain carbon and hydrogen stuck together.

Organic Nature: Hydrocarbons are special because they are part of a group of compounds that come from living things or things that were once alive. They have carbon and hydrogen in them, which is what makes them different from other types of compounds.

Explanation:

Answer:

the gravity pulling the object

the amount of force applied to the object

The concentration of Oxalic Acid is 0.2625 M.

A kinetic experiment is conducted to determine the rate law of a reaction. The concentration of Oxalic Acid can be calculated using the given amount of the reactants and the volume of the test tube. A balanced chemical equation can be used to find the stoichiometric ratio of the reactants in the given reaction.The balanced chemical equation for the reaction is:5 H2C2O4 + 2 KMnO4 + 3 H2SO4 → 10 CO2 + 2 MnSO4 + 8 H2OThe stoichiometric ratio between Oxalic Acid and Potassium Permanganate is 5:2. The Oxalic Acid is the limiting reactant, and Potassium Permanganate is in excess.The amount of Oxalic Acid in the solution can be calculated using the formula:molarity = moles of solute / volume of solution in L.The moles of Oxalic Acid can be calculated using the formula:moles of H2C2O4 = Molarity of H2C2O4 x Volume of H2C2O4 in L= 0.525 M x 0.006 L= 0.00315 moles.

The volume of the solution after the addition of the reactants is:6.00 mL of 0.525 M Oxalic Acid + 4.00 mL of distilled water + 2.00 mL of 0.200 M KMnO4= 12.00 mLThe concentration of Oxalic Acid in the solution can be calculated using the formula:Molarity of H2C2O4 = moles of H2C2O4 / volume of solution in L= 0.00315 moles / 0.012 L= 0.2625 M.

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There are approximately \(2.76 * 10^{24\) ammonia molecules in the given sample.

To calculate the number of ammonia molecules in the sample, we need to use Avogadro's number and the molar mass of ammonia.

The molar mass of ammonia \((NH_3)\) can be calculated by adding up the atomic masses of nitrogen (N) and hydrogen (H):

Molar mass of \(NH_3\) = (1 x atomic mass of N) + (3 x atomic mass of H)

              = (1 x 14.01 g/mol) + (3 x 1.01 g/mol)

              = 14.01 g/mol + 3.03 g/mol

              = 17.04 g/mol

Now, we can calculate the number of moles of ammonia in the sample using the formula:

Number of moles = Mass of the sample / Molar mass

Number of moles = 78.25 g / 17.04 g/mol

              ≈ 4.5865 mol (rounded to four decimal places)

Finally, we can use Avogadro's number, which represents the number of particles (atoms, molecules, etc.) in one mole of a substance. Avogadro's number is approximately \(6.022 * 10^{23\) particles/mol.

Number of ammonia molecules = Number of moles x Avogadro's number

Number of ammonia molecules ≈ 4.5865 mol x (\(6.022 * 10^{23\) molecules/mol)

                           ≈ \(2.76 * 10^{24\) molecules (rounded to two significant figures)

Therefore, the provided sample contains roughly \(2.76 * 10^{24\) ammonia molecules.

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The number of ammonia molecules in the sample is approximately 2.764 x \(10^{24}\) molecules.

To calculate the number of ammonia molecules in a given sample, we need to use Avogadro's number and the molar mass of ammonia.

The molar mass of ammonia (NH3) is calculated as follows:

Molar mass of N = 14.01 g/mol

Molar mass of H = 1.01 g/mol

Total molar mass of NH3 = 14.01 g/mol + (3 * 1.01 g/mol) = 17.03 g/mol

Now, we can calculate the number of moles of ammonia in the sample:

Number of moles = Mass of sample / Molar mass of NH3

Number of moles = 78.25 g / 17.03 g/mol = 4.594 moles

Next, we use Avogadro's number, which states that there are 6.022 x \(10^{23}\) molecules in one mole of a substance.

Number of molecules = Number of moles * Avogadro's number

Number of molecules = 4.594 moles * 6.022 x \(10^{23}\) molecules/mol = 2.764 x \(10^{24}\) molecules

Therefore, there are approximately 2.764 x \(10^{24}\) ammonia molecules in the given sample of 78.25 g.

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The wheels will have about 0.620 g of chromium plated on them.

For the measurement using the aluminium ion selective electrode, the balanced redox reaction is 2 Al (s) + 3 Pb2+ (aq) 2 Al3+ (aq) + 3 Pb. (s)

The standard potential of the cell, E°cell, can be calculated using the cell notation as follows:

E'cell is equal to E'cathode minus E'anode.

E°cell = 0 Volts. (-1.66 V)

1.66 V for E°cell.

Ecell, the calculated cell potential, is 1.42 V. The aluminium ion content in the water sample can be determined using the Nernst equation:

Ecell equals (RT/nF) - E°cell. 1.42 V = 1.66 V - (0.0257 V) ln ([Al3+]/(1.4 x 10-6 M)) ln ([Al3+]/[Pb2+])

[Al3+] = 2.84 x 10^-5 M

Calculating in mg/L:

7.68 x 10-7 mg/L = 2.84 x 10-5 M x (1 L/1000 mL) x (26.98 g/1 mol) x (1 mg/1000 g)

The amount of lead ion in the water sample is less than the 0.06 mg/L EPA limit for drinking water. As a result, drinking the water is safe.

Faraday's law can be used to determine how much chromium is plated onto the wheels: moles of e- = (current x time) / (F)

F stands for the Faraday constant, which is 96485 C/mol e-. Because each mole of electrons moves one mole of chromium atoms (Cr3+ + 3e- Cr), it is possible to compute the moles of chromium used in plating.

moles of Cr equal (moles of e-) / 3

Using its molar mass (51.996 g/mol), one can then get the mass of chromium plated:

Cr's mass is equal to its molar mass multiplied by its molecular weight.

Changing the values indicated:

The formula is as follows: moles of e- = (4.12 A x 2.53 h x 3600 s/h) / (96485 C/mol e-) = 0.0357 mol e- moles of Cr = 0.0357 mol e- / 3 = 0.0119 mol Cr mass of Cr = 0.0119 mol Cr x 51.996 g/mol = 0.620 g Cr

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For 1 mole of S₂O₃²⁻  0.5 mole of S₂O₈²⁻  will be used.

A reaction in which the number of atoms in reactants is equal to the number of atoms in the products is called a balanced reaction.

The reaction given in the question is

S₂O₈²⁻   + 2I⁻      ⇄   2SO₄²⁻ + I₂

I₂ + 2S₂O₃²⁻ ⇄ 2I⁻ + S₄O₆²⁻

Adding the equation will give balance equation

S₂O₈²⁻  + 2I⁻  + 2S₂O₃²⁻   ⇄ 2SO₄²⁻  + 2I⁻ + S₄O₆²⁻

So x moles of S₂O₈²⁻ require 2x of S₂O₃²⁻

for 1 mole of S₂O₃²⁻  0.5 mole of S₂O₈²⁻  will be used.

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Answer:

Density, flammable,melting point

Explanation:

Im not 100% sure but the other 2 choices just dont make sense

Answer:

the partial pressure of methane CH₄ is 239.4 torr.

Explanation:

Given;

molar mass of methane, CH₄ = 90.0 g

molar mass of argon, Ar = 10.0 g

total pressure of the gases, Pt = 250 torr

number of moles of methane CH₄;

\(n_{CH_4} = \frac{90}{16} = 5.625 \ moles\)

number of moles of Ar;

\(n_{Ar} = \frac{10}{39.95} = 0.25 \ mole\)

The mole fraction of methane XCH₄ is calculated as;

\(X_{CH_4} = \frac{n_{CH_4} }{n_{CH_4} \ + \ n_{Ar}} \\\\X_{CH_4} = \frac{5.625}{5.625 \ + \ 0.25} \\\\X_{CH_4} = 0.9575\)

Apply Dalton's law of partial pressure, to determine the partial pressure of methane CH₄;

\(P_{CH_4} = X_{CH_4} P_t\\\\P_{CH_4} = 0.9575 \ \times \ 250 \ torr\\\\P_{CH_4} = 239.4 \ torr\)

Therefore, the partial pressure of methane CH₄ is 239.4 torr.

The partial pressure of CH₄ in the mixture containing 90 g of CH₄ and 10 g of Ar having a total pressure of 250 torr is 239.25 torr

We'll begin by calculating the number of mole of CH₄ and Ar. This can be obtained as follow:

Mass of CH₄ = 90 g

Molar mass of CH₄ = 12 + (4×1) = 16 g/mol

Mole = mass / molar mass

Mole of CH₄ = 90 / 16

Mass of Ar = 10 g

Molar mass of Ar = 40 g/mol

Mole = mass / molar mass

Mole of Ar = 10 / 40

Mole of CH₄ = 5.625 mole

Mole of Ar = 0.25 mole

Total mole = 5.625 + 0.25

Total mole = 5.875 mole

Mole fraction = mole of substance / total mole

Mole fraction of CH₄ = 5.625 / 5.875

Mole fraction of CH₄ = 0.957

Total pressure = 250 torr

Partial pressure = mole fraction × total pressure

Partial pressure of CH₄ = 0.957 × 250

Therefore, the partial pressure of CH₄ in the mixture is 239.25 torr

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Answer:

Explanation:

If any doubt comment your question or what needs clarification.

The compound barium acetate is a strong electrolyte. The reaction when solid barium acetate is put into water is written as

Ba(C₂H₃O₂)₂  -->  Ba ²⁺  +  2 C₂H₃O₂⁻¹

Barium acetate has the molecular formula of Ba(C₂H₃O₂)₂. It is a strong electrolyte. Strong electrolytes are those substances which when dissolved in water dissociates into ions. So when this specific substance is placed into water, this compound simply dissociates into its corresponding ionic forms, that is shown below

Ba(C₂H₃O₂)₂  (s)-->  Ba ²⁺ (aq)  +  2 C₂H₃O₂⁻¹ (aq)

So here We must take note that the 2+ and 1- are the charges of the ion.

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Answer:

Explanation:

In an oxidation-reduction (redox) reaction, electrons are transferred from one substance to another. There are two key components that are essential in a redox reaction:

An oxidizing agent (or oxidant): This is the substance that accepts electrons and becomes reduced during the reaction. The oxidizing agent is responsible for causing oxidation in the other substance involved in the reaction.

A reducing agent (or reductant): This is the substance that donates electrons and becomes oxidized during the reaction. The reducing agent is responsible for causing reduction in the other substance involved in the reaction.

In a redox reaction, the reducing agent is oxidized and loses electrons, while the oxidizing agent is reduced and gains electrons. The transfer of electrons from one substance to another is what drives the reaction and leads to the formation of new products.

For example, consider the reaction between magnesium metal (Mg) and oxygen gas (O2) to form magnesium oxide (MgO):

2Mg + O2 → 2MgO

In this reaction, magnesium metal is oxidized (loses electrons) and oxygen gas is reduced (gains electrons). Magnesium is the reducing agent, while oxygen is the oxidizing agent.

Yes , the buoyant force from the atmosphere is greater on her car than your balloon .

So, She is correct.

Since, the density of helium is less than air, the buoyant force exerted by air is less than the weight of the balloon filled with helium, causing the balloon to float in the air and rise.

What do you mean by buoyant force?

The term light power alludes to the vertical coordinated force that a liquid applies on an item that is to some degree or totally drenched in the liquid. The light power emerges from contrasts in hydrostatic strain - the tension applied by a static liquid.

What is the buoyant force on a helium balloon in air?

Helium has 0.0114 pounds per cubic foot. For a one cubic foot helium filled balloon , gravity pulls the down on the helium with a force of 0.0114 pounds while the air pushes up with a force equal to the weight of the air of the helium displaced, or 0.0807 pounds.

        Hence, the buoyant force from the atmosphere is greater on the car than the balloon.

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The London forces designated as A are much weaker than the dipole- dipole interaction designated as B.

The intermolecular forces are interactions that exists between molecules of a substance in a particular state of matter. The nature of intermolecular forces in a substance greatly affect the properties of the substance.

We can see that A represents weak London forces while B represents dipole - dipole interactions. The London forces are very much weaker than the dipole - dipole interactions.

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Cycloalkanes (n=3, 4, 5):

Cyclopropane (C3H6)

Cyclobutane (C4H8)

Cyclopentane (C5H10)

Alkenes (n=3, 4, 5):

Propene (C3H6)

Butene (C4H8)

Pentene (C5H10)

Cycloalkanes are a type of organic compounds that contain a closed ring of carbon atoms. The carbon atoms in the ring are bonded to each other with single covalent bonds. Cycloalkanes are saturated hydrocarbons because they have the maximum number of hydrogen atoms that can be bonded to each carbon atom. The simplest cycloalkane is cyclopropane, which has three carbon atoms in the ring. Other examples include cyclobutane, cyclopentane, cyclohexane, and so on.

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Answer:these remove the nitrate from. The water - plants

These produce waste that contains ammonia- fish

These convert ammonia into nitrate-bacteria

Explanation:

Plants remove the nitrate from the water, fishes produce waste that contains ammonia, and bacteria convert ammonia into nitrate.

An aquaponics system is a sustainable method of agriculture that combines aquaculture with hydroponics. In this system, fish or other aquatic animals are kept in a tank or pond. The fish produce waste in the form of ammonia-rich water.

This wastewater is then circulated to the hydroponic component of the system, where plants are grown in a soil-less medium or directly in water. Beneficial bacteria in the system convert ammonia into nitrites and then nitrates, which are essential nutrients for plants.

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Answer:

The Periodic Table can be divided into s, d, p, and f sublevel blocks. For elements in the s sublevel block, all valence electrons are found in s orbitals. For elements in the p sublevel block, the highest energy valence electrons are found in p orbitals.

Explanation:

Answer:

The [OH−] is 5.88x10^-7M.

Explanation:

1st) It is necessary to calculate the pH of the solution using the pH formula and replacing the concentration of H3O+:

Now we know that the pH is 7.77.

2nd) Now we can calculate the pOH of the solution using the relation between pH and pOH:

Now we know that the pOH of the solution is 6.23.

3rd) Finally, we can calculate the [OH−] using the pOH formula and replacing the value of pOH:

So, the [OH−] is 5.88x10^-7M.

Answer:

cool

Explanation:

The balanced equation for the dissolving of aluminum chloride into an aqueous solution with the dissociation of the ions is; AlCl3(s) → Al^3+ (aq) + 3 Cl^-(aq).

An equation is a representation of the change that occurs inside a reaction vessel. Usually, we use this tool to show on paper, a process that we can not see with or eyes.

The equation that shows the balanced equation for the dissolving of aluminum chloride into an aqueous solution with the dissociation of the ions is; AlCl3(s) → Al^3+ (aq) + 3 Cl^-(aq).

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Lowest - Producer - plants (mostly)

They get food by converting sunlight into nutrients

Middle - Consumer - example animals

They eat other living things such as plants or other animals for their nutrients

Top - Decomposer - bacteria/microorganisms

They decompose dead body

sorry if im wrong

The given reaction is a double displacement reaction where, Cl and NO₃ group displaces between and sodium and silver atoms. The complete reaction is written as follows:

\(\rm NaCl (aq) + AgNO_{3} (aq) \rightarrow AgCl (s) + NaNO_{3} (aq)\).

There are various kinds of reactions classified based on the way of regrouping of atoms in the reactants.  In a double displacement reaction, two species from the reactant side are displaced of each other.

The reaction between sodium chloride and silver nitrate gives sodium nitrate in aqueous form and the precipitate of silver chloride. Here the groups nitrate and chlorine displaces between sodium and silver. Hence it is a double displacement reaction.

The net reaction represents the formation of the silver chloride precipitate.

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Answer:

B

Explanation:

First, set AL2(so4)3 to 1 and use the law of conservation of mass to solve the problem.

and At first, there were only 23 atoms in the system. After the reaction, the number of atoms remained unchanged.

Answer:

A. was the object once part of and asteroid

Explanation:

A is correct because at first asteroid's pieces fall off and burn up to enter the atmosphere and meteoroid's are small while asteroid's are big and rocky

D. Is the object made of rock? The question "Is the object made of rock?" would best confirm that the object is a meteoroid.

Meteoroids are small rocky or metallic objects that are in space and can potentially enter the Earth's atmosphere. By determining if the object is made of rock, it aligns with the characteristics of a meteoroid.

Option A, "Was the object once part of an asteroid?" does not necessarily confirm that the object is a meteoroid since meteoroids can come from various sources, not just asteroids.

Option B, "Where is the object located?" does not provide specific information about the nature of the object and can apply to comets and asteroids as well.

Option C, "Does the object orbit the sun?" is a characteristic shared by comets, asteroids, and meteoroids. It does not specifically confirm that the object is a meteoroid.

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The calculate the age of the rock sample values, the age of the rock sample can be determined.

we can use the concept of radioactive decay and the ratio of 87Sr to 87Rb. Since 87Sr is a stable product of the beta decay of 87Rb, the increase in the ratio of 87Sr to 87Rb over time reflects the decay of 87Rb.

The ratio of 87Sr to 87Rb in ancient samples is given as 0.0205. This means that for every 0.0205 moles of 87Rb, there is one mole of 87Sr.

Since the half-life of 87Rb is 4.75×10^10 years, after each half-life, half of the 87Rb would have decayed into 87Sr. Therefore, the ratio of 87Sr to 87Rb increases by a factor of 2.

To determine the age of the rock sample, we can calculate the number of half-lives that have occurred based on the change in the ratio. The ratio of 0.0205 corresponds to 1 half-life, 0.041 corresponds to 2 half-lives, 0.082 corresponds to 3 half-lives, and so on.

By taking the logarithm of the ratio change and dividing it by the logarithm of 2 (since the ratio doubles with each half-life), we can find the number of half-lives.

Using this information, the age of the rock sample can be calculated as follows:

Age (in years) = number of half-lives × half-life of 87Rb

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At 300 K, The gases in order of increasing average velocity will be N2O < Ar < N2 < CH4

The molecular mass of of a gas is directly proportional to its Molecular Velocity. That is to say that  Gases made up  lighter molecules will have greater  high-speed particles and relatively higher velocities while . Gases made up of heavier molecules have greater  low-speed particles, and  relatively lower velocities.

Therefore  considering the gases

The order of increasing average velocity at 300K will be N2O < Ar < N2 < CH4

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Answer:

Mole = number of molecules divided by the avogadro's constant.

Molar mass of NaCI =23 + 35.5 =58.5g/mol

Mass= moles multipled by molar mass of NaCI

M