What is the environmental impact of extracting minerals from the ground?
Responses

increases available industry jobs
damages available extraction technology
causes air, water, and soil pollution
immediately depletes the global supply

The mass of solid magnesium necessary to evolve 45.0mL of hydrogen gas at STP is 0.48 g

The reaction between solid magnesium and any acid will displace hydrogen.

When solid magnesium reacts with hydrochloric acid, magnesium chloride and hydrogen gas will be formed.

At STP (standard temperature and pressure) 1 mole of solid magnesium will produce 22.4 L.

1 mole of Mg -----------------> 22.4 L of H₂

? mole of Mg ------------------> 45 mL of H₂

= (0.45 L) / (22.4)

= 0.02 mole

The mass of 1 mole of solid magnesium = 24 g/mol

required mass =  0.02 mole  x  24 g/mol

required mass = 0.48 g

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Answer:

Litmus papes is an indicator

A reaction rate can be calculated using a pretty simple procedure.A reaction rate must be calculated from tabulated values or discovered empirically because it depends on change over time.

Describe how a sample experiment might be used to determine the ordering with respect to two different reactants?

     aA+bB→cC+dD

      (14.2.1)

    Also possible to write as:

      response rate = 1a

   (A's disappearance rate)

   = −1b

 (B's disappearance rate

 = 1c

  (C's rate of formation)

  = 1d\s(rate of production of D) (rate of formation of D)

The following is the general example of the distinct average rate of           reaction

 response rate = 1CR1[R1

Δt=⋯=−1CRnΔ[R

 Δt=1CP1Δ[P1]

 Δt=⋯=1CPnΔ[Pn]

 Δt    

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If you notice your crush is frequently right next to you or near you in a group setting or a meeting at work, it could be a strong indication that they are romantically interested in you.

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In order for an element to transform into a new element, the particles which must be released is the protons.

This is referred to as subatomic particle which is present in the nucleus and is positively charged. The proton and the electron must be equal in a neutral atom.

The proton is also equal to the atomic number which is why it is the particle which can be added removed to change the element. It is because a change in atomic number will automatically mean a change in the element which therefore makes it the correct choice.

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In order for an element to transform into a new element, the particles which must be released to change the number of protons is: beta particles.

A beta particle can be defined as an isotope which typically undergoes radioactive decay through the emission of a radiation with a negative one (-1) charge. This ultimately implies that, an atom of neutron becomes a proton and an electron (₀e⁻¹), and an atom of proton also becomes a neutron and a positron (⁰⁻e₁⁺) during beta decay.

Based on scientific information and records from radioactivity, we can reasonably infer and logically deduce that an atom of proton becomes a neutron and a positron during a beta decay as shown by this chemical reaction:

³H₁  ----->   ³He₂ + ⁰e₋₁ + ⁰v₀

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When the final electron acceptor is an organic molecule the process to make ATP molecules is termed fermentation.

The fermentation pathway is an anaerobic series of chemical reactions by which the cell can generate ATP (the energy coin of all types of cells) in order to perform metabolic activities such as cell differentiation and cell reproduction. During this process, pyruvate molecule is used as the final electron acceptor.

Therefore, we can conclude that the fermentation pathway uses pyruvic acid or pyruvate as the final acceptor, which is an organic molecule.

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Aluminum metal is produced by passing an electric current through a solution of aluminum oxide (Al2O3) dissolved in molten cryolite (Na3AlF6).  the molar masses of Al2O3 is 101.96g/mol and Na3AlF6 is 209.94g/mol.

Electric currents are streams of electrically charged particles, such as electrons or ions, moving through a conductor or a void. It is calculated as the net rate of electric charge flowing through a surface or into a control volume. 622 The moving particles are the charge carriers, which can be any of a variety of particle types depending on the conductor. Electric circuits typically use electrons flowing through a wire as charge carriers. In semiconductors, they could either be electrons or holes. In an electrolyte, ions are the charge carriers, whereas in plasma, an ionized gas, ions and electrons are the charge carriers.

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A burner system, a basket, and an envelope are components shared by all hot air balloons. The size and shape of the envelope, the deflation mechanism, the shape and design of the basket, and the arrangement, style, and number of burners are all different.

The balloon will sink if the pilot leaves the valve open long enough. In essence, the sole controls are heat to raise the balloon and ventilation to lower it.

The pilot opens the vent that allows air out of the balloon canopy after locating a good landing area. The balloon began to drop as a result.

A hole known as a parachute vent can be found at the top of a hot air balloon. Pulling a rope to open it causes heated air to be released, causing the balloon to drop. The pilot has complete control over how much hot air is injected into the balloon, enabling flawless control.

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The results of the technician’s combustion experiment do not contradict the law of conservation of mass because some products escaped as gaseous carbon (iv) oxide, water vapor, and other gases.

The statement of the law of conservation of mass states that matter cannot be created nor destroyed, but change from one form to another.

This helps to explain that no loss in mass of a  substance occurs in ordinary chemical reactions, rather, the sum of the masses of the reactants at the beginning of a reaction is equal to the sum of the products at the end of the reaction.

The balancing of chemical equations also follows this law.

Considering the given reaction:

The technician determined the mass of the firewood and oxygen reactants before burning to be 2.72 kg.

At the end of the reaction, after the firewood finished burning, the pile of cooled ash that remained had a mass of 0.095 kg.

When comparing the mass of the reactants and products, the mass of the product seems to be less than the mass of the reactants in contradiction to the law of conservation of mass.

However, there is no loss in mass of the materials because some products escaped in the form of gas into the atmosphere.

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Answer: D

Explanation:

This is wrong according to the Periodic Table here's a image! Hope this helped! :D

The final volume of the solution is 4.5 L.

How can we calculate molality and volume of mixed solutions?
The idea of calculating molalities after combining solutions indicates that regardless of whether you change the solution's concentration or volume, the number of moles in the mixture stays the same. So, by expanding the volume of a solution by adding water, one can modify the molality or concentration of a particular molecule or ion in the solution.
The typical formula to calculate the same is M₁V₁ = M₂V₂

Given, initial molality of NH₄Br solution = M₁ = 2.25 m
Initial volume of NH₄Br solution = V₁ = 0.250 L
Final molality of NH₄Br solution = M₂ = 0.125 m
Let, final volume of NH₄Br solution = V₂
Using the relation obtained above, we have
2.25*0.250 = 0.125*V₂ ⇒ V₂ = (2.25*0.250)/0.125 = 4.5 L
Thus, the final volume after pure water addition is 4.5 L.

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Animal cells typically have small vacuoles that aid in the sequestration of waste. Vacuoles in plant cells aid in preserving the balance of water.

A membrane-bound cell organelle is known as a vacuole. Animal cells typically have small vacuoles that aid in the sequestration of waste. Vacuoles in plant cells aid in preserving the balance of water. A single vacuole may occasionally occupy the majority of a plant cell's interior space.

Vacuoles are membrane-bound sacs that serve a variety of purposes in a cell's cytoplasm. Vacuoles are extremely important for serving as structural support, as well as functions like storage, waste disposal, protection, and growth, and they typically have a large size in mature plant cells.

The most noticeable organelle in plant cells is the vacuole. Due to its size, it plays a key role in the homeostasis process by storing a variety of inorganic and organic molecules.

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The partial pressures, based on the equilibrium constant, are 0.2825 atm for hydrogen, 0.0509 atm for chlorine and 1.6666 atm for HCl.

We know that:
[tex]pH_{2} + pCl_{2} + pHCl = 2 atm[/tex]

pH₂ - partial pressure of hydrogen

pCl₂ - partial pressure of chlorine

pHCl - partial pressure of HCl

We also know that the expression for the equilibrium constant looks like this:

[tex]K_{p} =\frac{pHCl^{2} }{pH_{2}*pCl_{2} } =193[/tex]

Because the total coefficients on the left and right sides of the reaction are equal (=2), then Kp = Kc. Finally, all the chlorine present in the mixture comes from HCl degradation. If we mark the partial pressure of chlorine as X, then:

[tex]\frac{(3.59-2X)^{2} }{(0.47+X)*X } =193[/tex]

When transformed, we get the following quadratic equation:

[tex]189X^{2} + 105.07X - 12.8881 = 0[/tex]

X = 0.1034

This means that we have 0.1034 moles of chlorine. We can use that to calculate the moles of hydrogen and HCl:

(0.47+0.1034) = 0.5734 moles of hydrogen;

(3.59 - 2*0.1034) = 3.3832 moles of HCl

The partial pressure of a gas (pX) in a gas mixture is equal to the molar percentage multiplied by the total pressure:

pX = P(total) * nₓ / n(total)

We can use this to calculate the partial pressures of all the gases present in the mixture:
pH₂ = 2 atm * 0.5734 mol / (0.1034 mol + 0.5374 mol + 3.3832 mol) = 0.2825 atm

pCl₂ = 2 atm * 0.1034 mol / (0.1034 mol + 0.5374 mol + 3.3832 mol) = 0.0509 atm

pHCl = 2 atm * 3.3832 mol / (0.1034 mol + 0.5374 mol + 3.3832 mol) = 1.6666 atm

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The total heat content of the ten potato chips will be -1600J we can calculate this equation by using this reaction

ΔH = q = mCΔT

To determine the amount of heat acquired or lost by a sample (q) the equation used  is

ΔH = q = mCΔT

where

m = mass of the sample

c = the specific heat,

T = temperature change

Here in this question

m = 1000 g

T = 2° C(change in temperature)

c = 4.18 J/g

Putting these values in the equation

q = 1000× 4.18 ×2

q = 1600 J

Here q is positive hence ΔH will be negative.

ΔH = -1600J

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A thermometer bulb is built of thin glass so that it can effectively conduct heat from an object that comes into contact with the mercury in the bulb.

With the chemical symbol Hg and the atomic number 80, mercury is a class of elements. It was once called hydrargyrum, which is a combination of the Greek terms Hydor and Argyros, and it is also known as quicksilver. Mercury is toxic in its entirety. While some mercury compounds are more hazardous than others, all of them are harmful. Mercury exposures can harm the immune system, kidneys, liver, nervous system, and more depending on the type and quantity. The lungs, kidneys, and nervous system can all suffer damage from inhaling mercury fumes.

Mercury is utilized in pressure measuring devices even though a wide variety of liquids may be used due to its high density and reduced space requirement. The fact that PTFE is a good conductor of electricity makes it a valuable addition to electrical switches.

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Answer:

Usually the use of two calibrant ions to bracket the analyte ion will achieve better accuracy. To achieve optimum mass accuracy the m/z of a single point calibrant ion should be as close as possible to that of the analyte ion; this is particularly important for magnetic sector mass spectrometers.

All objects are bend  or change shape in collision and other contact forces are applied to them. in collision between two object both objects experience forces that are equal to magnitude of and opposite in direction .such forces often cause one object is speed up (gain momentum) and other object to slow down (lose momentum).

collision is defined as , the sudden violent meeting of two bodies, such as two billiard balls, a golf club and a ball, a hammer and a nail head, two wagons in direct contact, or a falling object and the floor. In addition to the properties of the materials of these two objects, two factors influence the result of the impact: the force and the time during which the objects collide. It is a  common experience that a hard steel ball dropped on a steel plate will almost rebound to  the position from which it was dropped, but a ball of putty or lead will not.

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Answer: -40

Explanation:

equation:

t = 1.8t+32

move variable to one side

t x -1.8t=32

add like terms

-.8t = 32

change decimal to fraction

-4t/5 = 32

multiply 5 to both sides

-4t = 160

devide -4

t = -40

The linear features in the given image resemble a homogenous, radial drainage pattern type volcanic river which is not easily erodible.

A river that emerges from the volcano's center flank is its most notable feature. The result is a volcanic river feature resembling a triangle-shaped accumulation of pebbles, sand, and even finer sedimentary rocks, like silt.

As the volcanic river systems exit, the drainage pattern is radial. For mountainous terrain, we often see a radial drainage pattern.

We can observe that the drainage pattern of the volcanic river is in a clear and well-oriented position, indicating that the underlying material is homogenous. We cannot obtain such a sort of characteristic in a heterogeneous material and thus the substance is homogenous because of this.

The materials of the volcanic river are not easily erodible since they are highly robust.

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Oxymercuration‑reduction or Hydroboration‑oxidation, gives the same compound 1-cyclo pentanol.

A compound in linguistics is a lexeme composed of more than one stem. The process of word construction that results in compound lexemes is known as compounding, composition, of nominal composition. An open compound or a spaces compound is one that uses a space rather hyphen or concatenation; the alternative is a closed compound.

The compound's meaning may be comparable to or distinct from the meanings of its constituents in isolation. With very few expectations, the first component stem in English compound words is emphasized.

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When Carter went outside one summer day to check the mail, the following statements accurately identify the types of energy transfer:

Conduction, convection and radiation are all methods of heat transfer. Conduction is the transfer of heat between two solid bodies in contact. It occurs when two solid bodies of different bodies are in contact, and heat always flows from the hotter body to the colder body.

Convection occurs when heat is transferred by the flow of matter in a liquid or gas. Liquids and gases are normally poor conductors of heat, but they are able to transfer heat through convection as the molecules of the fluid carry the thermal energy as they move. Radiation is the transfer of heat in a vacuum. Unlike conduction and convection, radiation does not require a material medium, as heat is transferred by electromagnetic waves.

When carter stepped on the sidewalk, there was a temperature difference between his foot and the sidewalk. This enabled the transfer of heat from the sidewalk to his feet through conduction. The sidewalk, however, was hot because it had been exposed under the sun. Infrared red rays from the sun transfer heat by radiation to the surface of the earth, and the sidewalk absorbed some of this radiation.

Radiation is also absorbed by the wind and carried about by convection, just like the warm breeze carter felt on his face. Some radiation was absorbed by Carter's skin, which was the warmth he felt on his skin from the sunshine. The sunlight touching his face is not an example of conduction because conduction only occurs when two solid surfaces are in contact.

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The concentration of [tex]Ca^{2+}[/tex] is 25mmol/l

Using complex-forming processes, complexometric titrations are primarily used to identify metal ions. Despite the fact that a variety of complexing agents can be utilized for this purpose, in actuality, the titrants are virtually always compounds with iminodiacetic acid functional groups. Titration is done in a solution with a pH of 10 (with an ammonium buffer added to promote the complexation of the [tex]Ca^{2+}[/tex]   and [tex]Mg^{2+}[/tex] ions).

Since eriochrome black T forms deep red-wine-colored complexes with just a very small portion of the [tex]Mg^{2+}[/tex] ions, it is employed as the indication to show the end point. The most prevalent titration indicators in complexometric experiments are organic dyes, which work by creating colored. When the reaction is complete, the color changes because the indicator is replaced by EDTA, which creates a more stable complex with the metal.

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The time it will take the student to get home if she averages 42 miles per hour is 8.7 minutes.

The time taken for an object to move over a certain distance can be calculated by dividing the distance moved by the average speed as follows:

Time = Distance/average speed

According to this question, a student has to stay after school to make up a test. If she lives 9.8 km away from the school. The time it will take her to get home can be calculated as follows:

9.8km is equivalent to 6.09 miles

Time = 6.09 mi ÷ 42mi/hr

Time = 0.145hours

0.145 hours can be converted to 8.7 minutes.

Therefore, it will take the student 8.7 minutes to get home.

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The skin has special cells called "melanomine" (melanocytes) that produces melanin, a special pigment that is responsible for our skin, hair, and eye color: True.

Skin's oil glands, found near the dermis's border with the epidermis, secrete an oily substance called sebum that lubricates skin and hair: True.

The skin is the largest organ found in the body. It functions as a covering and a protective layer for the organs found in the body.

The layers of the skin include:

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False, The entropy change of any system and its surroundings, considered together, and resulting from any real process is negative, approaching zero when the process approaches.

What is an entropy change?

An entropy change can be defined as the change that occurs in the state of disorder or randomness of a thermodynamic system that is associated with the conversion of heat or enthalpy into work.

Any system with a great degree of disorderliness has said to have more entropy.

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The correct relationship between mechanical energy, kinetic energy, and potential energy is M.E = P.E + K.E.

Mechanical energy, is the energy that an object possesses when it is in motion or the energy that an object stores due to its location. Renewable energy is also fueled by mechanical energy. In order to efficiently produce electricity or convert energy, many sources of renewable energy depend on mechanical energy.

The expression for total mechanical energy is as follows

M.E = P.E + K.E

As total mechanical energy is the sum of all the kinetic as well potential energy stored in the system.

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Answer:

A)it will accept electrons to make a full set of 8

Answer: antimony

Explanation:

The measurement is 3 inches.

The attributes of an object or an event are measured and quantified so that they can be compared to other things or events. Therefore, measurement is the process of determining the size or smallness of a physical quantity in comparison to a primary reference quantity of a similar kind.

The range and applications of measurement depend on the situation and industry. Measurements do not apply to nominal attributes of things or occurrences in the natural sciences and engineering, as stated in the International Vocabulary of Metrology published by the International Bureau of Weights and Measures.

However, measures in a number of fields, such as statistics and the social and behavioral sciences, might comprise more than one level.

The specified length is 3 inches.

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