Explain if the process of turning pennies into brass would work on other coins - like a quarter, nickel, or dime.

Answers

Answer 1

The process of turning pennies into brass simply has to do with dissolving the copper in the penny by a chemical process and this is then replaced with a brass alloy and this process could theoretically be applied to other coins.

What is a coin?

A coin is a tiny, flat, round piece of metal or plastic which is used as legal tender or a medium of exchange. It should be noted that they are mass-produced at a mint so as to facilitate trade, and their weight is standardized.

In order achieve various mechanical, electrical, and chemical properties, it should be noted that copper and zinc can be combined in different ratios in order to create the alloy known as brass.

The composition of other coins, such as quarters, nickels, and dimes, is different from pennies and would require different chemical processes to alter. Additionally, it is illegal to deface or alter U.S. coin currency, so it would not be legal to do this process on any other coin. In this case, it can be applied to other coins.

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Related Questions


Why did the scientists only add earthworms to half of the pipes?

...

Answers

An annelid can regenerate to some extent after being split in half, and in some species, you may even get two worms. However, the common earthworm only regenerates from the tail end; Every time, the head end dies.

Can worms withstand being divided in half?

The Washington Post reports that many earthworms can lose several segments from their head end and grow back, and that almost all worms can regrow their tails if they are amputated. However, for some worms, the likelihood of fully regenerating decreases with the number of segments removed.

What substance does the earthworm secrete to stabilize the tunnel walls?

Coelomic fluid, which is secreted by many earthworms, makes it easier for them to move through the soil. This fluid forms a cement-like substance that lines the burrows of some burrowing species to prevent the walls from falling down.

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Be as explicit as you can in describing how the covalent bond between an atom of Chlorine and an atom of Iodine forms. (What happens to the electrons, which electrons are involved, and what allows this to happen MUST all be part of your answer to receive full credit.)

Answers

When two atoms of chlorine and iodine join together to form a covalent bond, their outermost electrons interact to form a chemical bond.

What is a Covalent bond?

A covalent bond is a type of chemical bond that involves the sharing of a pair of electrons between two atoms. Covalent bonds are formed when two atoms come together to share their electrons in order to reach a more stable electron configuration. As a result, the two atoms become bonded together by the attraction of their shared electrons.

The chlorine atom has seven valence electrons, while the iodine atom has seven as well. Both atoms will want to complete their octets, so the two atoms share their outermost electrons with each other. During the formation of the covalent bond, the chlorine atom will donate one of its electrons to the iodine atom, while the iodine atom will donate one of its electrons to the chlorine atom. This sharing of electrons allows the two atoms to form a single bond and fill their octets, forming a covalent bond.

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what kind of information does this map show ​

Answers

Answer: C(Elevation of surface features)

Explanation: It's a topographical Map which displays lines of Equal Elevation.

Which supports the idea that conservation of mass is a scientific law instead of a hypothesis?

A- It is an educated guess.

B- It has been tested and supported once or twice.

C- It has been examined, tested and supported over centuries.

D- It has been tested many times and sometimes is true and sometimes isn’t.

Answers

Answer:

C- It has been examined, tested and supported over centuries.

Explanation:

The conservation of mass is a scientific law that states that matter cannot be created or destroyed, only transformed from one form to another. This law has been extensively tested and supported over centuries of scientific investigation, and it is considered to be a fundamental principle of chemistry and physics.

When 45. 8 g of alanine (C3H7NO2) are dissolved in 1200g of a certain mystery liquid X, the freezing point of the solution is 4. 10 ℃ less than the freezing point of pure X. Calculate the mass of sodium chloride that must be dissolved in the same mass of X to produce the same depression in freezing point. The van't Hoff factor i=1. 82 for sodium chloride in X. Be sure your answer has a unit symbol, if necessary, and is rounded to the correct number of significant digits

Answers

16.5 g is the mass of sodium chloride that must be dissolved in the same mass of X to produce the same depression at freezing point.

What are a molar mass and a mole?

Avogadro's number (6.022 x 1023) of molecules (or formula units) make up one mole of a substance (ionic compound). The mass of 1 mole of a chemical is indicated by its molar mass. It provides you with the number of grams per mole of a substance, to put it another way.

ΔT = Kc*W*i

Kc = cryoscopy constant of the solute X

W = molality of the solution

i = van't Hoff factor, For organic molecules, such as alanine, i = 1.

n = 45.8/89.09

n = 0.5141 mol

W = 0.5141/1.2 = 0.4284 mol/kg

So, Kc of X is:

4.10 = Kc*0.4284*1

Kc = 9.57 °C.kg/mol

So, if now sodium chloride is added to X, and the temperature change is the same, and i = 1.82:

4.10 = 9.57*W*1.82

W = 0.2354 mol/kg

The number of moles of the solute is then:

W = n/1.2

0.2354 = n/1.2

n = 0.2825 mol

The molar mass of sodium chloride is 58.44 g/mol, thus the mass is the molar mass multiplied by the number of moles:

m = 58.44*0.2825

m = 16.5 g

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Consider the combustion of propane:
C3H8 +502 3CO2 + 4H₂O
- →
Which of the following unit factors below is correct? (Select all that may apply)

A. There are 5 oxygen molecules reacting for every six oxygen atoms produced in CO2.

B. There are 5 oxygen atoms reacting for every 3 CO₂ molecules produced.

C. There are 10 oxygen atoms reacting for every four water molecules produced.

D. There are 10 oxygen atoms reacting for every six oxygen atoms produced in CO2.

Answers

Four water molecules are created for every ten oxygen atoms that are reacting.

Propane:

A three carbon alkane, propane has the chemical formula C3H8. At room temperature and pressure, it is a gas, but it can be compressed into a liquid for transportation.

What is the primary use of propane?

Its primary applications include home and water heating, food preparation and storage, clothing drying, and the powering of industrial and farm machinery. The production of plastics and other chemicals in the chemical sector also uses propane as a raw ingredient.

What are propane's three drawbacks?

Cons of propane heating

Compared to oil heating, propane produces fewer BTUs per gallon.Equipment that burns propane is frequently more expensive to buy than heating systems that use heating oil.To use the apparatus properly, care must be taken because propane is flammable in air.

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Is 1 mole equal to 1 molecule?

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No, a mole doesn't equal a molecule. Despite the fact that the terms "moles" and "molecules" are separate, the idea of "moles" can be used to quantify the number of molecules in a sample.

The primary distinction between a mole and a molecule is that a mole is a unit of measurement for amount whereas a molecule is an atomized chemical species.

A mole of a substance is the same number of molecules of that substance as there are carbon-12 atoms in precisely 12 g of the element. This indicates that the molecular weight of any material, stated in terms of atomic mass units, is equivalent to 1 mole of that substance's weight in grams.

Thus, a mole is an amount of 6.02210²³ particles, whereas a molecule has several atoms of different elements that are chemically connected to one another.

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A magnesium ion, Mg2+, with a charge of 3. 2×10−19C and an oxide ion, O2−, with a charge of −3. 2×10−19C, are separated by a distance of 0. 25 nm. How much work would be required to increase the separation of the two ions to an infinite distance?

Answers

The amount of work required to increase the separation of the two ions to an infinite distance is 3.68×10⁻¹⁸joules.

What is work and energy ?

When a push or pull applied to an object causes the object to move, that movement is referred to as work. We refer to energy as the ability to perform the work. The work completed in a given amount of time is referred to as power.

Mg²⁺with a charge is 3.2×10⁻¹⁹C

O²⁻with a charge of −3.2×10⁻¹⁹C

distance = 0.25 = 0.25 ×10⁻⁹m

We know that the constant of proportionality is equal to 8.99×10⁹Jm/C²

Work = -kq₁q₂/d

Substitute given values into the formula,

Work = 8.99×10⁹× 3.2×10⁻¹⁹× -3.2×10⁻¹⁹/ 0.25 ×10⁻⁹

Work =  8.99×10⁹×-1.024×10⁻³⁷/0.25×10⁻⁹

Work = 9.21×10⁻²⁸/ 0.25×10⁻⁹

Work = 3.68×10⁻¹⁸Joules.

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What do these two changes have in common?
sauce burning on a stove
firing a clay pot in a hot kiln

Both are caused by cooling
Both converse mass
Both are chemical changes
Both are physical changes

Answers

sauce burning on a stove and firing a clay pot in a hot kilnBoth are physical changes. Therefore, option D is correct.

What are physical changes?

Physical changes can be defined as changes affecting the state of a chemical substance, but not its composition. Physical changes can be used to separate mixtures into their component compounds, but can not generally be used to separate compounds into elements or simpler compounds.

Physical changes takes place when substances undergo a change that can not change their composition. while the chemical change in which the composition of a substance changes when substances combine or break up to form new substances.

In general a physical change can be consideed as reversible using physical means. A physical change includes a change in physical properties such as change of strength, change of durability, textural change, shape, size, volume and density.

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PLEASE HELP SOON!

What kind of reaction occurs in an electrolytic cell? What characterizes its voltage?

I know a redox reaction occurs in electrolytic cells, but am confused about the second part, please help! ​

Answers

In an electrolytic cell, an oxidation-reduction reaction occurs. This type of reaction involves the transfer of electrons from one species to another.

The voltage of an electrolytic cell is typically greater than the voltage of a galvanic cell and is determined by the reactants and the reaction conditions.

In an electrolytic cell, a chemical reaction is driven by an external electrical current. This current causes electrons to flow between two electrodes, typically a cathode and an anode. At the cathode, electrons are gained, leading to a reduction reaction, while at the anode, electrons are lost, leading to an oxidation reaction.

The voltage of an electrolytic cell is typically greater than the voltage of a galvanic cell, and is determined by the reactants and the reaction conditions. The voltage must be high enough to provide the energy needed to drive the reaction, and can be adjusted by changing the current. The reaction rate of an electrolytic cell can also be controlled by varying the current.

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Baed on thi information, which type of light i more likely to damage the material?

Answers

Based on the information, UV light is more likely to damage the material.

Which kind of light has the greatest chance of warming quartz?

Due to the fact that the infrared light bounces off the quartz, which increases its energy, the quartz may become warm.

The colors of paper and fabric can deteriorate due to ultraviolet light from the sun. In the presence of ultraviolet light waves, the chemicals in colored dyes can degrade. Sunburns may also result from ultraviolet radiation.

Paper and other organic materials will deteriorate, bleach, and deteriorate due to ultraviolet radiation. All of these modifications may reduce readability, affect how well artwork is regarded for its aesthetic qualities, and restrict access to the information it contains.

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Fe(OH)3->Fe2O3->Fe->FeCl2->Fe(OH)2

Answers

[tex]Fe(OH)3- > Fe2O3- > Fe- > FeCl2- > Fe(OH)2[/tex], represents a set of possible chemical reactions that Fe(OH)3, or iron(III) hydroxide, can undergo.

In the first reaction, Fe(OH)3 is converted into Fe2O3, or iron(III) oxide, through the process of thermal decomposition. This reaction occurs when Fe(OH)3 is subjected to high temperatures, causing it to break down into Fe2O3 and water vapor.

In the second reaction, Fe2O3 is reduced to Fe, or elemental iron, through the process of electrolysis. This reaction involves passing an electric current through a solution of Fe2O3, causing the Fe2O3 to be reduced to Fe at the cathode and oxygen to be produced at the anode.

In the third reaction, Fe is converted into FeCl2, or iron(II) chloride, through the process of chlorination. This reaction involves adding chlorine gas to a solution of Fe, causing the Fe to be converted into FeCl2 and hydrogen gas.

In the fourth reaction, FeCl2 is converted into Fe(OH)2, or iron(II) hydroxide, through the process of acidification. This reaction involves adding an acid to a solution of FeCl2, causing the FeCl2 to be converted into Fe(OH)2 and hydrochloric acid.

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The correct question is:

Explain this chemical reaction [tex]Fe(OH)3- > Fe2O3- > Fe- > FeCl2- > Fe(OH)2[/tex]

is the specific heat capacity of gaseous ethanl greater than. less thean or equal to the speciifc heat captity of liquid ethanol

Answers

The specific heat capacity of the gaseous ethanol is less than the specific heat capacity liquid ethanol.

The specific heat capacity is given as :

Q = mc ΔT

where ,

Q = heat

m = mass

c = specific heat capacity

ΔT = temperature change

The heating curve represented the temperature , T in the y axis and the heat added at the x - axis. the slope is given as :

T / Q = 1 / C

T is the temperature and the c is the specific heat capacity.

Thus, the heat capacity of the gaseous ethanol is low as compared to the liquid ethanol.

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Step 2: measure the area of the top of the syringe


The top of the syringe is a circle. You need to compute area for use in lead to computations of pressure valves. Start by using a ruler to measure the diameter. Estimate to the nearest. 1 cm


3. 60 cm


Divided by two to find the radius. Maintain significant figures


1. 80 cm


Substitute the radius into the formula pie r 2 To find the area of the top of the syringe. Maintain significant figures


10. 2 cm


Answers

The syringes' circle measures area 10.17 square inches.

The area of a circle is the area that a circle occupies on a two-dimensional plane. The region contained by the circle's radius or perimeter is another way to define the circle's area. The circle's radius, or r, is equal to its diameter in half.

The diameter given is 3.60cmThe radius given is 1.80cm

We need to calculate the area of the circle

You may determine the circle's surface area via

Change the formula's value for r.

Area of circle =π[tex]r^{2}[/tex]

Area of circle =3.14[tex]\times[/tex]1.80[tex]\times[/tex]1.80

Area of circle =10.17 [tex]cm^{2}[/tex]

Hence the area of the Circle is 10.17[tex]cm^{2}[/tex]

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Determine the number of atoms of each element in the following: 4Al(OH)3

Answers

symbol

aluminium - Al 4

oxygen- o 12

hydrogen- H 12

P4(s) + Cl₂(g) → PCI3(l) + energy 4. Calculate the gram-formula mass of the product. Show all work. g/mol ​

Answers

The gram formula mass of the product, PCl₃, is 137.5 g.

What is the gram formula mass of a compound?

The amount of a compound that has the same mass in grams as the formula mass in an atomic mass unit is said to have the compound's gram formula mass. It is also known as the molar mass.

Every element's atom has a characteristic mass, and each compound's molecule has a characteristic mass determined by the compound's formula.

The gram formula mass of the product PCl₃ is calculated below:

The atomic mass of P = 31 g

The atomic mass of Cl = 35.5 g

The gram formula mass of PCl₃ = 31 + 35.5 * 3

The gram formula mass of PCl₃ = 137.5 g

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Malachite is a green colored mineral that is 57.5% copper. What mass of copper is present in a 250.0 g sample of malachite

Answers

57.5% Cu2(CO3)(OH) (OH) Other elements are also present in addition to copper.

To get the mass percent of copper in malachite (Cu2(OH)2CO3), apply the following formula:

Malachite (Cu2(OH)2CO3) has a molar mass of 2x63.5% + 2(16+1) + 12 + (16x3) = 127 + 2(17) + 12 + 48 = 127 + 34 + 12 + 48 = 221g/mol.

Cu2(OH)2CO3 has a Cu mass of 2 x 63.5g, or 127g.

The mass-based fraction of Cu in Cu2(OH)2CO3 is calculated as Cu2(OH)2CO3 mass per mol mass multiplied by 100 = 127/221 x 100 = 57.5%.

Malachite Cu2(OH)2CO3 has 57.5% of its mass in copper.

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If you double the total amount of Na ions, but you also double the amount of water they are dissolved in, __________.

Answers

Na ion concentration will remain constant if you increase the overall number of Na ions while also increasing the volume of water in which they are dissolved.

The amount of material in a certain area is referred to as concentration in chemistry. Another definition states that concentration is the ratio of a solution's solute to its entire solution or solvent. Mass per unit volume is a common way to express concentration. However, moles or units of volume can also be used to express the solute concentration. Concentration could be per unit mass instead of volume. Concentration can be computed for any mixture, despite often being used with chemical solutions.

By mathematically dividing the mass, moles, or volume of the solute by the mass, moles, or volume of the solution, one may calculate the concentration (or, less commonly, the solvent).

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Suppose you run this reaction in a solvent that dissolves elemental mercury and elemental oxygen. What is the equilibrium-constant expression in terms of molarities for the reaction, using (solv) to indicate solvation.

Answers

At 55 °C, the equilibrium constant for this reaction is 6.68. A pharmaceutical chemist prepares 15.0 L of an initial 0.275 M acetic acid and 3.85 M ethanol solution.

Create an equation that can be solved for x by plugging the equilibrium concentrations (expressed in terms of x) into the formula for the equilibrium constant. (d) The equation from subpart (c) is cubic (it bears the formula ax3 + bx2 + cx + d = 0). In general, it is impossible to solve cubic equations in closed form. Indicate the direction (toward product or toward reactants) in which the mixture must change if it is not at equilibrium. The concentrations of SO 2 Cl 2 and SO 2 are 0.108 M and 0.052 M, respectively, in a mixture of the three gases that has reached equilibrium.

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16. What are the two types of mixtures?

Answers

Heterogeneous and homogeneous mixtures are the two types of mixtures.

How to define the heterogeneous and homogeneous mixtures?

When compared to homogeneous mixtures, heterogeneous mixtures can be visually divided into individual components. The most prevalent kind of homogeneous mixture is a solution, which can be a solid, liquid, or gas.

Solid, liquid, or gaseous homogeneous mixtures can exist. They are uniform in both appearance and chemical make-up. Water, air, steel, detergent, saltwater mixture, and other substances are examples of homogeneous mixtures. When two or more metals are combined in a specified proportion, an alloy is created.

A combination is said to be heterogeneous if its composition is not constant throughout. Vegetable soup is a complex concoction.

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What are the molecules of aspartame?

Answers

Aspartyl-phenylalanine-1-methyl ester, also known as the methyl ester of the dipeptide of the amino acids aspartic acid and the essential amino acid phenylalanine, is the term for an artificial, non-carbohydrate sweetener.

Sweeter than sugar flavoring ingredient that is broken down into phenylalanine and aspartic acid. Aspartyl-phenylalanine-1-methyl ester, also known as the methyl ester of the dipeptide of the amino acids aspartic acid and phenylalanine, is a synthetic, non-carbohydrate sweetener known as aspartame. Aspartic acid is a methyl ester of a dipeptide made up of aspartic acid and phenylalanine, two amino acids. Along with methanol, aspartame is entirely hydrolyzed to its individual amino acids in the digestive system. In the body, aspartame is hydrolyzed into aspartic acid (40%) phenylalanine (50%) and methanol (10%). An amino is aspartic acid.

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A student standardized a solution of NaOH and found that the concentration was 0.544 M. They then used it to titrate a monoprotic acid. If 45.50 mL of the base was used, how many moles of acid were neutralized? (Do not report your answer in scientific notation)

Answers

The number of moles of a monoprotic acid neutralized is equal to 0.025 mol.

What is a neutralization reaction?

A neutralization reaction can be defined as a reaction in which reaction of an acid and base generates salt and water. When a strong acid and a strong base react the salt can be neither acidic nor basic.

When monoprotic acid HA reacts with NaOH (a strong base), the resulting salt is NaA and water.

HA    +    NaOH   →   NaA  +   H₂O

Given, the concentration of NaOH = 0.544 M

The volume of the NaOH = 45.50 ml = 45.50 × 10⁻³

The number of moles of NaOH, n = M × V = 0.544 × 45.50 × 10⁻³ = 0.025 mol

The number of moles of HA monoprotic acid = moles of NaOH = 0.025 mol

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A student filled a dialysis tube with 97% water solution and sealed the ends. The tube and its contents had a mass of 55 grams. The student placed the tube in a solution, and the mass of the tube and its contents increased to 60 grams. Into which solution was the dialysis tube placed

Answers

The dialysis tube was placed in a solution with a higher concentration of solutes than the 97% water solution inside the tube.

What is solution?

Solution is a way of resolving a problem or addressing an issue. It often involves identifying the underlying cause of the issue and then coming up with a plan that can be implemented to address the problem. Solutions may involve simple steps, such as changing a behavior, or they may involve more complicated processes that require multiple steps, such as creating new policies or procedures. Solutions should be designed to be effective, sustainable, and measurable.

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Select the correct answer. which gas is the most abundant greenhouse gas?
a. ozone
b. chlorofluorocarbon
c. carbon dioxide
d. methane
e. water vapor

Answers

E) The most significant and prevalent greenhouse gas is water vapor. Ozone, carbon dioxide, methane, nitrous oxide, and other gases are also present.

Which major source of greenhouse gases is it?

Over the past 150 years, almost all of the rise in atmospheric greenhouse gases has been caused by human activities. Burning fossil fuels for transportation, electricity, and heating is the primary human activity in the United States that contributes to the emission of greenhouse gases.

Which four greenhouse gases have the greatest impact?

The greenhouse gases on Earth warm the planet by storing heat in the atmosphere. Carbon dioxide, methane, nitrous oxide, and water vapor—all of which are found naturally—as well as fluorinated gases—which are made—are the main gases that cause the greenhouse effect.

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Give a Question/Problem for Hot and Cold Compress Pillow.

Help mee plsss

THANK you!!!

Answers

Answer:

One problem that people may encounter when using a hot and cold compress pillow is that the pillow may not stay hot or cold for a long enough period of time. This can be frustrating for people who are using the pillow to alleviate muscle pain or reduce inflammation, as they may need to continually reheat or refreeze the pillow in order to maintain its therapeutic benefits. To solve this problem, people may need to find a pillow that is better at retaining heat or cold, or they may need to use additional heating or cooling elements (such as hot water bottles or ice packs) in conjunction with the pillow.

Explanation:

How many moles of K2SO4 are in 216. g of K2SO4? (molar mass = 174.26 g/mol)

Answers

Answer:

1 grams K2SO4 to mol = 0.00574 mol

10 grams K2SO4 to mol = 0.05739 mol

50 grams K2SO4 to mol = 0.28693 mol

100 grams K2SO4 to mol = 0.57386 mol

200 grams K2SO4 to mol = 1.14772 mol

500 grams K2SO4 to mol = 2.86929 mol

1000 grams K2SO4 to mol = 5.73858 mol

How many moles of CH3CH2OH are contained in 548 mL of 0.0788 M CH3CH2OH solution?

Answers

0.0432 moles of CH3CH2OH are contained in 548 mL of a 0.0788 M CH3CH2OH solution.

what is molarity?

Molarity is a unit of concentration that expresses the amount of solute in a solution in terms of moles of solute per liter of solvent. It is represented by the symbol M. It is calculated by dividing the number of moles of solute by the number of liters of solvent in the solution. For example, a 0.5 M solution of NaCl would contain 0.5 moles of NaCl dissolved in every liter of water.

To determine the number of moles of a solute in a solution, you can use the formula: moles = (concentration (M) x liters of solution).

In this case, the concentration of the CH3CH2OH solution is given as 0.0788 M and the volume is given as 548 mL. Converting mL to L by multiplying it by 10^-3, we get 0.548 L. By applying the formula, moles = 0.0788 M x 0.548 L = 0.0432 moles of CH3CH2OH.

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(100 POINTS + BRAINLIEST) i don't know which subject this belongs to but this is an earth science class!!!

Tell the story of the life cycle of a star the size of our sun, Be sure to include all stages from "pre-birth" to death.
Describe the differences between our sun's life cycle to a star who is at least 5 times bigger than our sun.

Answers

The life cycle of a star the size of our sun starts with a nebula, a huge cloud of dust and gas. The gravity of the nebula compresses the cloud until the atoms fuse together, creating a star. This stage is known as pre-birth.

Next, the star enters a main sequence phase, where it shines brightly for millions of years, powered by nuclear fusion.

Eventually the star will slowly run out of hydrogen and the fusion process will become less and less efficient. The star will expand and become what is known as a red giant. This marks the end of the main sequence phase.

After this point, the star expels its outer layers, leaving behind a small, hot core called a white dwarf. It will continue to cool down until it becomes a black dwarf.

If the star is at least 5 times bigger than our sun, it will enter a different life cycle. After the red giant phase, the star will undergo a supernova explosion, which will spew dust and gas into the surrounding areas. These remainders will later form new stars, planets, and other cosmic bodies. What's left of the star will become a neutron star or a black hole.

If a strong force acts on the metal towers of the suspension bridge, the towers will not break into pieces, like glass would, but will bend instead. Which property of metals explains this phenomenon?

Answers

The periodic chart has many different types of elements. Some elements are metals, some are nonmetals, and yet others are metalloids. Therefore, ductility is the property of metals that explains the given phenomenon.

What is metal?

Metals are hard, conduct electricity, are ductile, lustrous, and malleable materials. Since metals have free electrons that's why they can conduct electricity. Since atoms in metals are very closely packed in a definite crystal solid. It is not brittle that is it can not be broken down easily.

If a strong force acts on the metal towers of the suspension bridge, the towers will not break into pieces, like glass would, but will bend instead. Ductility is the property of metals that explains the given phenomenon.

Therefore, ductility is the property of metals that explains the given phenomenon.

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What quantity of energy does it take to convert 0.562 kg ice at −20.0°C to steam at 250.0°C? Specific heat capacities: ice, 2.03 J/g·°C; liquid, 4.18 J/g·°C; steam, 2.02 J/g·°C; ΔHvap = 40.7 kJ/mol; ΔHfus = 6.02 kJ/mol.

Answers

The quantity of energy required to convert 0.562 kg ice at -20.0°C to steam at 250°C is equal to 1885.4 KJ.

What is the specific heat capacity?

The specific heat capacity can be described as the amount of energy needed to raise the temperature in one unit of material by one-degree celsius.

The addition or emission of heat from the system will the temperature of the substance will be changed:

Q = mCΔT

Given, the amount of ice, m = 0.562 Kg = 562 g

The change in the temperature = 100 -20 = 80°C

The specific heat capacity of the water, C = 4.18J/g°C

The specific heat capacity of the ice, C = 2.03 J/g°C

The phase transition from ice to steam:

H₁ = 562 × 2.03 × (0-(-20))

H₁ = 22,817 J = 22.8 KJ

The enthalpy of the fusion will be absorbed:

H₂ =  n × H(fus)

The number of moles of water = 562/18 = 31.22 mol

H₂ = 31.22 × 6.02 kJ/mol

H₂ = 187.95 KJ

Phase transition from water at 0°C to water at 100°C:

H₃ = 562 × 4.18 × 100

H₃ = 234 KJ

The phase transition from water at 100°C to steam at 100°C:

H₄ = n × H(vap)

H₄ = 31.22 × 40.7 kJ/mol

H₄  = 1270.65 KJ

The heat to make steam at a temperature of 250°C:

H₅ = m × S×ΔT

H₅ = 562 × 2.02 ×150 = 170 KJ

The total energy needed to convert  0.562 kg ice at -20.0°C to steam at 250.0°C:

H = H₁ + H₂+ H₃+ H₄ +H₅

H = 1885.4 KJ

Learn more about specific heat capacity, here:

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