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The Moon doesn’t actually change ________, but it appears to from Earth because the part lit by the Sun changes as it travels around Earth.

Charge flowed : 240 Coulombs

Given

t = time = 60 s

I = current = 4 A

Required

Charge

Solution

General formula :

Q = I x t

Q = charge (electricity), C

Input the value :

Q = 4 x 60

Q = 240 Coulombs

Answer:

Oil and vinegar separate because it is a suspension

Explanation:

When you let suspensions sit the particles begin to layer out, in the salad dressing the oil layers out on top of the vinegar. The two layers of oil and vinegar don't actually dissolve in each other. The layer with the lower density (oil) floats on top of the layer with a higher density (vinegar)

Water and vinegar are both hydrophilic and mix, whereas the oil is hydrophobic. Oil and vinegar separate because it is a suspension

Hydrophilic molecule are water-loving polar molecule.

They interact with water or they are dissolved in water or water like polar solvent.

For instance, the phospholipid molecules of the plasma membrane has a hydrophilic phosphate group.

Hydrophobic is a water hating  substance which can not dissolve in water, but other non-polar solvent.

Thus hydrophobic substances are lipophilic in nature  and the hydrophobic solvents are used to  separate water-immiscible substances from water.

The layers of oil and vinegar can not  dissolve with each other. The oil layer has the  lower density floats on top of the layer with a higher density product called vinegar.

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Answer:

The reaction occurs and all H2 and O2 unite to form H20

The statement that would best explain the observation of no liquid being evident in the sealed bottle is: b. Liquid and vapor are at equilibrium in the bottle.

When liquid and vapor are at equilibrium in a closed system, it means that the rate of condensation (liquid turning into vapor) is equal to the rate of vaporization (vapor turning into liquid). In this case, it appears that all the liquid has vaporized, and no liquid is evident. This suggests that the liquid and vapor have reached a state of equilibrium, where the amount of liquid remaining is negligible compared to the amount of vapor present.

The vapor state is favored when equilibrium is established because the pressure exerted by the vapor phase reaches a point where it equals the vapor pressure of the liquid at that temperature. At this equilibrium point, no further net condensation or vaporization occurs, resulting in the absence of visible liquid in the sealed bottle.


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The value of ΔH for the reaction CO(g) + H₂(g) + O₂(g) → CO₂(g) + H₂O(g) is -1272 kJ.

To calculate the enthalpy change (ΔH) for the given reaction, we can use Hess's law, which states that the overall enthalpy change of a reaction is equal to the sum of the enthalpy changes of the individual reactions involved.

Given the enthalpy changes:

1. 2 C(s) + O₂(g) → 2 CO(g)... ∆H = -222 kJ

2. C(s) + O₂(g) → CO₂(g)... ∆H = -394 kJ

3. 2 H₂(g) + O₂(g) → 2 H₂O(g)... ∆H = -484 kJ

We need to manipulate these reactions to obtain the desired reaction:

1. Reverse reaction 2: CO₂(g) → C(s) + O₂(g)... ∆H = +394 kJ

2. Multiply reaction 2 by 2 to balance carbon atoms: 2 CO₂(g) → 2 C(s) + 2 O₂(g)... ∆H = -788 kJ

3. Leave reaction 3 unchanged: 2 H₂(g) + O₂(g) → 2 H₂O(g)... ∆H = -484 kJ

By adding reactions 2 and 3, we obtain the desired reaction:

CO(g) + H₂(g) + O₂(g) → CO₂(g) + H₂O(g)... ∆H = -788 kJ + (-484 kJ) = -1272 kJ

Therefore, the value of ΔH for the given reaction is -1272 kJ.

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At over 1700 miles thick the lower mantle contains superheated rocks and minerals.

The mantle is the mostly-solid bulk of Earth's interior. The mantle lies between Earth's dense, super-heated core and its thin outer layer, the crust.

As Earth began to take shape about 4.5 billion years ago, iron and nickel quickly separated from other rocks and minerals to form the core of the new planet. The molten material that surrounded the core was the early mantle.

The lower mantle extends from about 660 kilometers (410 miles) to about 2,700 kilometers (1,678 miles) beneath Earth’s surface. The lower mantle is hotter and denser than the upper mantle and transition zone.

Therefore, at over 1700 miles thick the lower mantle contains superheated rocks and minerals.

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Answer:

Ore

hope this helps

thanks for the points

mixtures can exist in different states, and their properties can vary accordingly. Solid mixtures like trail mix consist of distinguishable components.

How to solve the problem?

One solid mixture is trail mix, which consists of various solid components such as nuts, seeds, and dried fruit. These components are made up of molecules such as proteins, fats, and carbohydrates. Trail mix is a heterogeneous mixture as the different components can be seen and distinguished from each other.

One liquid mixture is soda, which consists of carbonated water, sugar, and flavorings. The carbonated water is a mixture of water and carbon dioxide gas, while the sugar and flavorings are made up of molecules. Soda is a homogeneous mixture as the different components are evenly distributed and cannot be distinguished from each other.

One gas mixture is air, which is a mixture of nitrogen, oxygen, carbon dioxide, and other gases. These gases are made up of atoms such as nitrogen atoms, oxygen atoms, and carbon atoms. Air is a homogeneous mixture as the different gases are evenly distributed and cannot be distinguished from each other.

In conclusion, mixtures can exist in different states, and their properties can vary accordingly. Solid mixtures like trail mix consist of distinguishable components, while liquid mixtures like soda have evenly distributed components. Gas mixtures like air are also homogeneous, and their components are not easily distinguishable from each other.

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A system of linear equations to balance the following chemical reaction:

Limestone, CaCO₃, neutralizes the acid, H₃ O, in acid rain is:

2H₃O + CaCO₃ → 3H₂O + Ca + CO₂

To balance the chemical equation:

H₃O + CaCO₃ → H₂O + Ca + CO₂

We need to ensure that the number of atoms of each element is the same on both sides of the equation.

Let's assign variables to the coefficients of each compound:

H₃O: x

CaCO₃: y

H₂O: z

Ca: a

CO₂: b

Now, we can set up the system of equations based on the number of atoms for each element:

For hydrogen (H):

3x = 2z

For oxygen (O):

3x + 3y = 2z

For calcium (Ca):

y = a

For carbon (C):

y = b

For calcium (Ca):

a = 1

Solving this system of equations will give us the balanced coefficients. Let's solve it:

From the equation y = a, we have y = 1.

From the equation y = b, we have b = 1.

Substituting b = 1 into the equation 3x + 3y = 2z, we have:

3x + 3 = 2z

From the equation 3x = 2z, we have x = (2/3)z.

Substituting x = (2/3)z into the equation 3x = 2z, we have:

3(2/3)z = 2z

2z = 2z

This equation is true for any value of z, indicating that z can take any value.

Therefore, we can choose z = 3 to simplify the coefficients:

x = (2/3)z = (2/3)(3) = 2

y = 1

z = 3

a = 1

b = 1

Thus, the balanced equation is:

2H₃O + CaCO₃ → 3H₂O + Ca + CO₂

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Answer:

C, Reactants rearrange to form new products

Explanation:

The correct options that describe the steps required to determine the shape of a molecule are: both bonding and nonbonding electron pairs must be considered, the Lewis structure of the molecule must be drawn first, and the most stable arrangement of the outer electron pairs dictates the shape of the molecule.

The options "only electrons that form bonds need to be considered" and "the most stable arrangement is the one that has the outer electron pairs as close together as possible" are not entirely accurate, as nonbonding electron pairs also contribute to the shape and the most stable arrangement may not necessarily be the one where the outer electron pairs are closest together.

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Following options correctly describe the steps required to determine the shape of a molecule:

A- Both bonding and nonbonding electron pairs must be considered.

B- The Lewis structure of the molecule must be drawn first.

C- The shape of the molecule is dictated by the most stable arrangement of the outer electron pairs.

E- The most stable arrangement is the one that has the outer electron pairs as close together as possible.

It is important to consider both bonding and nonbonding electron pairs because they both contribute to the electron density around the central atom and affect the molecular shape. The Lewis structure is the starting point to determine the arrangement of the outer electron pairs, which determines the molecular shape. The most stable arrangement is the one that minimizes the repulsion between the electron pairs, which occurs when they are as close together as possible.

Only considering electrons that form bonds is not enough because nonbonding electron pairs also contribute to the electron density and affect the molecular shape.

So, options A, B, C, and E are correct.

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The silver coating on the spoon is produced. When electrolyzing a spoon made from iron with silver, the anode, cathode, and electrolyte that can be used are as follows:

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If 2-iodobutane had been used to alkylate saccharin the reaction would have been faster and would have produced racemic mixture.

The correct answer is: C. Faster; a racemic mixture.

If 2-iodobutane had been used to alkylate saccharin, the reaction would have been faster compared to other alkylating agents. This is because 2-iodobutane is a primary alkyl halide, and primary alkyl halides are generally more reactive in nucleophilic substitution reactions.

However, the use of 2-iodobutane as an alkylating agent would lead to the formation of a racemic mixture. This is because primary alkyl halides undergo nucleophilic substitution via an SN2 mechanism, which involves a backside attack by the nucleophile leading to inversion of stereochemistry at the chiral carbon. As a result, both enantiomers of the alkylated product would be formed in equal amounts, resulting in a racemic mixture.

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Answer:30 moles of oxygen are required if 12 moles of  are consumed.

Explanation:The given balanced equation is:

From this balanced equation, there is 2:5 mol ratio between  and  .

We are asked to calculate the moles of  required to react with 12 moles of .

It's a mol to mol conversion and the set up for this would be as:

=

So, 30 moles of oxygen are required to react with 12 moles of  .

He+, F⁻¹, Al⁺², P⁻³, and Mg⁺² ions are likely to be formed, while the N⁺⁵ ion is not likely to be formed.

Ions are formed when an atom loses or gains electrons, resulting in a net electrical charge.

N⁺⁵ cannot be formed as nitrogen already has five valence electrons and it is difficult to gain or lose electrons to form an ion.

He+ can be formed by the loss of electrons from its only occupied orbital.

F⁻¹ can be formed by gaining one electron to achieve a full valence shell.

Al⁺² can be formed by losing two electrons from its three valence electrons, as it is energetically favorable to lose electrons.

P⁻³ can be formed by gaining three electrons to fill its valence shell, and Mg⁺² can be formed by losing two electrons from its two valence electrons.

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Answer:

The frozen water sublimed, moving directly from a solid state to gaseous state. This process although slow, over a time period of 6 months, will eventually result in all the frozen water vaporizing.

Explanation:

The process whereby a solid changes from solid to gaseous state without passing through the liquid phase is known as sublimation. Any solid that turns into a vapor without going through the liquid phase can be said to sublime or "sublimate."

Frozen water or Ice sublimes by turning directly into water vapor without first transitioning into a liquid. Though the process occurs slowly at the temperatures and pressures within household freezers and is not readily observable, over a long period as in the example given, it can then be observed.

Some other examples of ice to water vapor transition include;

1. A wet sweater hung on a line in freezing temperatures. Although it may take a few days, the wet clothing article will eventually dry out.

2. Snow changing to water vapor. On very cold days, when it's too cold for snow to melt, it will after a long while sublime into the air as water vapor.

3. Glaciers undergo ablation which is a form of sublimation. Ablation is the process whereby the snow and ice of the glacier slowly begins to evaporate or turn into vapor.

Answer:

the water has evaporated

Explanation:

Answer:

3.Ammonia is a compound, and nitrogen and hydrogen are elements.

Explanation:

Look up the differences between elements, compounds and mixtures.

Answer: This is the process of chemical change. Examples of chemical properties are flammability (a material's ability to burn in the presence of oxygen) and reactivity (how easily a material combines chemically with other materials).

Explanation: Chemical properties are properties that can be measured or observed only when matter undergoes a change to become an entirely different kind of matter. They include reactivity, flammability, and the ability to rust. ... Flammability is the ability of matter to burn. Burning of wood is a chemical change as new substances which cannot be changed back (e.g. carbon dioxide) are formed. For example, if wood is burned in a fireplace, there is not wood anymore but ash. ... Special details which do not change in a substance without new substances being formed are called physical properties.

Answer:

chemical property

Explanation:

Answer:

\(c=3.71\ J/g^{\circ} C\)

Explanation:

Given that,

Mass of sample, m = 996.9 g

The change in temperature of the sample, \(\Delta T=-70.98^{\circ}C\)

Heat produced, Q = 62.9  calories = 263173.6 J

The heat released by a sample due to change in temperature is given by :

\(Q=mc\Delta T\)

Where

c is the specific heat capacity

So,

\(c=\dfrac{Q}{m\Delta T}\\\\c=\dfrac{263173.6}{996.9\times 70.98}\\\\c=3.71\ J/g^{\circ} C\)

So, the specific heat of ethanol is equal to \(3.71\ J/g^{\circ} C\).

The rate law that is consistent with the proposed mechanism is [-d[H₂]/dt = k[H₂][ICl].

The sum of the two processes produces the overall reaction, which is:

H₂(g) + 2ICl(g) → 2HCl(g) + I₂(g)

We must take into account the rate-determining step, which is the step with the slowest rate, in order to derive the rate law for the total reaction. It is step 1 in this instance.

H₂(g) + ICl(g) → HI(g) + HCl(g) is the rate-determining step (g)

This step's rate rule is-d[H₂]/dt = k[H₂][ICl]

[ICl]

We can assume that the concentration of HI is always in equilibrium with the concentrations of H₂ and ICl because step 2 is quick.

Therefore, -d[H₂]/dt = k[H₂][ICl] is the rate law for the entire reaction.

Therefore,  [-d[H₂]/dt = k[H₂][ICl] is the rate law that is consistent with the hypothesized mechanism.

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in the classical free electron model, the neglect of electron-ion interaction is referred to as the free electron approximation. The correct option is (ii) Only.

This approximation assumes that the interaction between electrons and ions can be ignored, treating the electrons as free particles moving in a periodic potential without any significant influence from the ions. The independent electron approximation, on the other hand, assumes that the behavior of each electron can be considered independently of the others. The Drude electron-ion approximation incorporates electron-ion interactions and is not part of the classical free electron model. Therefore, the correct option is (ii) Only.

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Answer/Explanation:

quantum of energy is important because the energy of a particle, and also how long it has had that energy, with infinite precision. Quantum, in physics, discrete natural unit, or packet, of energy, charge, angular momentum, or other physical property. the term also applicable to quanta of other forms of electromagnetic energy such as X - rays and gamma rays.

Answer:

A chemical reaction is usually accompanied by easily observed physical effects, such as the emission of heat and light, the formation of a precipitate, the evolution of gas, or a color change

A nuclear reaction changes the number of protons and or neutrons in an atom.

A nuclear reaction is a type of reaction that results in the change of the nucleus of an atom. We know that a nucleus of an atom is made up of protons and neutrons.

So we can conclude that a nuclear reaction changes the number of protons and or neutrons in an atom.

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Answer: Nuclear reactions happen inside the nucleus,so it changes the protons and neutrons

Explanation:

I'm sorry, but there seems to be a misunderstanding in your question. John Corigliano is a contemporary American composer known for his works in various genres, including orchestral, chamber, and vocal music.

However, the claim that he wrote an original prelude from "Mr. Tambourine Man" is inaccurate. "Mr. Tambourine Man" is a famous song written by Bob Dylan and released in 1965. It is not associated with John Corigliano or a prelude composition. It's important to ensure the accuracy of information when referring to specific works and their composers to avoid confusion.

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The pH of a 0. 40 m solution of methylamine is 12.

Given,

\(K_b\)= 4. 4 x \(10^{-4}\), pH=0.40m

\(CH_3NH_2 + H_2O^{-} = CH_3HN_3^2 +OH^-\)

\(K_b\)= \(\frac{[CH_3HN_3^2] +[OH^-]}{[CH_3NH_2] }\)=\(\frac{x^{2} }{0.40-x}\)=4. 4 x \(10^{-4}\) (Assume x << 0.295 since Kb is small)

x=\(\sqrt{4.4*10^{-4}*0.40 }\)=0.01326

p(OH)=-log(0.01326)=1.8774

So, p(H)=14-1.8774=12.12≅12

Methylamine is an organic substance having the chemical formula CH3NH2. This colorless gas is a derivative of ammonia, but instead of having one hydrogen atom, there is one methyl group instead. It is the most fundamental primary amine.

In addition to being supplied as an anhydrous gas in pressurized metal containers, methylamine is also sold as a solution in methanol, ethanol, tetrahydrofuran, or water. In the industrial setting, anhydrous methylamine is delivered in pressurized railcars and tank trucks. It smells strongly like rotten fish. The synthesis of various other widely accessible chemicals uses methylamine as a building ingredient.

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Answer:

heterogeneous mixtures are mixtures that you can see the different compounds in them, homogeneous mixtures are mixtures that have different compounds in them but are not visible. they both have different mixtures or compounds in them.

Explanation:

I think the Answer is C because Flourine is stronger in electron attraction and is smaller so it has a stronger electronic pull. Hope this helps :)