Hi please help with AP Chem

An average copper penny minted in the 1960s contained about 3.000g of Copper. 866.49 g chalcopyrite had to be mined to produce 100 pennies.

The term mole is defined as the amount of substance of a system which contains as many elementary entities.

1 mole is equal to 6.023 × 10 ²³ molecules.

Given:

Copper used = 100 pennies x 3.0g Cu per penny

= 300.0 g Cu

Then, identify the pathway and molar ratio from Cu formed back to CuFeS₂ required using the balanced reactions:

1 Cu₂S from 2 CuS : 2Cu from 1 Cu₂S : 2CuS from 2CuFeS₂

Therefore, 2Cu from 2CuFeS₂, they are in same molar ratio.

Now, convert g Cu to moles and g of CuFeS₂

= 300.0 g Cu × 1 mol Cu / 63.546g Cu × 2 mol CuFeS₂ / 2 moles Cu

= 4.72 moles CuFeS₂

The chalcopyrite had to be mined to produce 4.72 moles CuFeS₂ × 183.54 g CuFeS₂ / 1 mole CuFeS₂

= 866.49 g CuFeS₂

Thus,866.49 g chalcopyrite had to be mined to produce 100 pennies.

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Balance the following equation:

3Cu (s) + 8HNO₃ (aq) ⟶ 3Cu(NO₃)₂(aq) + 2NO (g)  + 4H₂O (l)

Reaction equilibrium is a condition where the components of the reactants and reaction products remain in the system, in a state of equilibrium the rate of the reaction to the right is equal to the rate of the reaction to the left.

Cu → Cu²⁺ + 2e⁻   ⟶ Equation (1)

NO₃⁻ + 4H⁺ + 3e⁻ ⟶ NO + 2H₂O  ⟶Equation  (2)

Equation (1) × 3+ Equation (2) ×2(for equalising electrons)

      3Cu ⟶ 3Cu²⁺ + 6e⁻

2NO₃⁻ + 8H⁺ + 6e⁻ ⟶ 2NO + 4H₂O

___________________________________

3Cu + 2NO₃⁻+ 8H⁺ ⟶ 3Cu²⁺ + 2NO + 4H₂O

But 8H⁺ + 8NO₃⁻ ⟶ 8HNO₃

The 6 NO₃²⁻ combine with Cu²⁺

So, balanced equation is:

3Cu (s) + 8HNO₃ (aq) ⟶ 3Cu(NO₃)₂(aq) + 2NO (g)  + 4H₂O (l)

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40 + 140 = 180 kg of water and carbon dioxide were created in total when gasoline burns.

An average gasoline tank holds 13 to 16 gallons. For instance, the fuel capacity of a Ford Focus is 13.5 gallons, that of an Elantra is 14, and that of a Mazda 3 ranges from 14.9 to 15.9 gallons, depending on the model.

Mass of gasoline plus mass of oxygen equals the combined mass of carbon dioxide and water produced.

combined mass of the water and carbon dioxide produced = 40 + 140 = 180 kg The chemical reaction will appear as follows:

the following equation: fuel + oxygen + carbon dioxide + water + heat

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The kinds of chemicals found to be produced in the flasks at the conclusion of the Miller-Urey experiment are wаter ([tex]H_{2}O[/tex]), methаne ([tex]CH_{4}[/tex]), аmmoniа ([tex]NH_{3}[/tex]) аnd hydrogen ([tex]H_{2}[/tex]).

The Miller-Urey experiment (or Urey-Miller experiment) wаs аn experiment thаt simulаted hypotheticаl conditions present on the eаrly Eаrth аnd tested for the occurrence of chemicаl evolution. The experiment used wаter ([tex]H_{2}O[/tex]), methаne ([tex]CH_{4}[/tex]), аmmoniа ([tex]NH_{3}[/tex]) аnd hydrogen ([tex]H_{2}[/tex]). The chemicаls were аll seаled inside а sterile аrrаy of glаss tubes аnd flаsks connected together in а loop, with one flаsk hаlf-full of liquid wаter аnd аnother flаsk contаining а pаir of electrodes. The liquid wаter wаs heаted to induce evаporаtion, spаrks were fired between the electrodes to simulаte lightning through the аtmosphere аnd wаter vаpor, аnd then the аtmosphere wаs cooled аgаin so thаt the wаter could condense аnd trickle bаck into the first flаsk in а continuous cycle.

Your question is incomplete, but most probably your options were

A. methane, ammonia, and hydrogen

B. amino acids and carbohydrates

C. amino acids, carbohydrates, and nucleic acids

D. carbohydrates and nucleic acids

Thus, the correct option is A.

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Iron: Chemical element with the atomic number 26, Water: Compound made up of hydrogen. Saltwater: Solution of salt in water, uniform composition, homogeneous mixture.

Soil: Soil is a mixture of organic and inorganic materials, such as rock fragments, minerals, water, air, and decomposed of dead plants and animals

Iron: Iron (Fe) is a chemical element with the atomic number 26. It is an element because it cannot be broken down into simpler substances by chemical means.

Water: Water is a chemical compound with the chemical formula H2O.

Saltwater: Saltwater is a solution of salt (NaCl) in water. In a saltwater solution, the salt is evenly dispersed in the water and the composition is uniform throughout the solution.

Soil: Soil is a mixture of organic and inorganic materials, such as rock fragments, minerals, water, air, and decomposed of dead plants and animals. Soil is a heterogeneous mixture because it contains different substances that are not evenly distributed and can be physically separted.

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Here are two sources you could use for your presentation on the Haber process:

"The Haber-Bosch Process: Feeding the World with Ammonia." Chemical Safety Facts, American Chemistry Council, 2020, https://www.americanchemistry.com/Education/Resources/High-School/Chemical-Safety-Facts/The-Haber-Bosch-Process-Feeding-the-World-with-Ammonia.html

"The Haber Process." Royal Society of Chemistry, 2020, https://www.rsc.org/periodic-table/element/1/nitrogen/the-haber-process

MLA citation for source 1:

"The Haber-Bosch Process: Feeding the World with Ammonia." Chemical Safety Facts, American Chemistry Council, 2020, https://www.americanchemistry.com/Education/Resources/High-School/Chemical-Safety-Facts/The-Haber-Bosch-Process-Feeding-the-World-with-Ammonia.html

MLA citation for source 2:

"The Haber Process." Royal Society of Chemistry, 2020, https://www.rsc.org/periodic-table/element/1/nitrogen/the-haber-process

The Web of Things (IoT) is the term used to refer Software to a network of physical devices, or "things," that are connected to one another and share data.

In this usage, "software" refers to the running scripts, programs, and apps on a device. It can be likened to the variable part of a computer, meanwhile the hardware is the part that will never change. The two primary classifications of software are application and system software

Computer software is typically separated into two primary categories: application software and system software. Programs that control the resources of the computer system and simplify application programming are included in systems software.

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A balanced chemical equation is one that contains the same number of atoms on the reactant and product sides.

For instance, a synthesis process results in the development of solid potassium chloride when chlorine gas combines with solid potassium.

The following reaction equation will apply.

Cl_2(g)+K(s)--> KCL

These are the atom counts on the reactant side.

Cl = 2

K = 1

The product side atom count is as follows.

Cl = 1

K = 1

Therefore, multiply K on the reactant side by 2 and multiply KCl on the product side by 2 to balance this chemical equation.

Cl_2(g)+K(s)--> KCL

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when comparing ethanol, CH CH, OH, and sodium ethoxide, NaOCH, CH3, sodium ethoxide is the better nucleophile because it has a negative charge.

In chemistry, a nucleophile is a chemical species that form bonds with the aid of donating an electron pair. All molecules and ions with a loose pair of electrons or at least one pi bond can act as nucleophiles. due to the fact nucleophiles donate electrons, they're Lewis bases.

Nucleophilic describes the affinity of a nucleophile to bond with definitely charged atomic nuclei. Nucleophilicity, on occasion known as nucleophile strength, refers to a substance's nucleophilic person and is often used to compare the affinity of atoms. Neutral nucleophilic reactions with solvents consisting of alcohols and water are named solvolysis. Nucleophiles might also participate in nucleophilic substitution, wherein a nucleophile will become attracted to a full or partial high-quality charge and nucleophilic addition. Nucleophilicity is intently associated with basicity.

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As per the given balanced chemical equation of the reaction between aluminum and sulfur, 2 moles of Al needs 3 moles of sulfur. Then, 2.04 moles of Al requires 3.06 moles of S.

Aluminum sulphide, Al₂S₃ is an ionic compound formed by donation of electrons from Al metal to S atoms. The balanced chemical equation of their reaction is given here.

It is clear that, 2 moles of aluminum requires 3 moles of sulfur for complete reaction. Hence, the number of moles of sulfur needed to react with 2.04 moles of Al is calculated as follows:

Number of moles of S = (2.04 ×3 ) / 2 = 3.06.

Therefore, as per the given equation, 3.06 moles of sulfur is required to react with 2.04 moles of aluminum.

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Reactions that can be used to synthesize an aldehyde as a reaction product are:

The other two options (B and E) do not result in the synthesis of an aldehyde as a reaction product.

Correct answer: letters A, C and D.

Extending the explanation of the above reactions, the reduction of esters using DIBAL-H involves the addition of a hydride to the carboxylate, resulting in the formation of an alkoxide which is then hydrolyzed to a primary alcohol.

The hydroboration-oxidation of a terminal alkyne involves the addition of a borane to the alkyne, resulting in the formation of a boronate ester which is then oxidized to a ketone. The reduction of carboxylic acids using LiAlH4 involves the addition of a hydride to the carboxyl group, resulting in the formation of an alkoxide which is then hydrolyzed to a primary alcohol.

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Saturated, unsaturated, and supersaturated are three terms used to characterize solutions. These are the right responses.

Less solute is present in an unsaturated solution than the solution can dissolve. In comparison to saturated solutions, supersaturated solutions have more dissolved solute and may dissolve more solute at a given temperature. Solutions that have less dissolved solute than the solvent's saturation point are said to be unsaturated solutions (at that specific temperature gradient).

A saturated solution is one that dissolves the most solute possible at a particular temperature. To saturate it, a solution containing more solute than that is needed.

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The given question is incorrect. The correct question is:

Which can best identify how solutions can be classified based on solubility?

a. unsaturated

b. desaturated

c. saturated

d. supersaturated

The number of oxygen atoms present in one mole of serotonin would be 6.02×10²³ atoms.

Serotonin goes by the chemical formula C10H12N2O. This means that 1 mole of serotonin contains 10 moles of carbon  12 moles of hydrogen, 2 moles of nitrogen, and a mole of oxygen.

According to Avogadro, 1 mole of any substance contains 6.02×10²³ atoms of the substance.

In other words, 1 mole of oxygen atom will contain 6.02×10²³ atoms of oxygen.

This means that 1 mole of serotonin will contain 6.02×10²³ atoms of oxygen.

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Answer:

B 1.2x10^24

Explanation:

NOT A and C for the following reason: Combustibility and Reactivity are chemical properties since they involve changing one substance into another.

Color, density, hardness, melting and boiling points are examples of physical qualities along with hardness. Matter has a variety of physical characteristics, such as color, hardness, malleability, solubility, electrical conductivity, density, melting point, and boiling point. The colors of the elements are quite consistent from one element to the next. The mass-to-volume ratio, color, odor, hardness, and volume are a few examples of the physical characteristics of matter. Other characteristics include color, which interacts with visible light, hardness, and volume. Chemistry characteristic. Because combustion is a chemical reaction, a substance's combustibility—a feature that determines whether it will experience a combustion reaction—is a chemical attribute. c. color: A material quality.

Question

Which of the following properties of substances are physical properties? Select all that apply

a. Combustibility

b. Color

c. Reactivity

d. Melting Point

e. Mass

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We determine the probability that each of the following compounds exists as a molecule or as an ionic compound:

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Answer: dark clothes have trouble reflecting the sun's rays

Explanation:

Because of that, the dark-colored clothing traps the heat from the sun. This then makes you feel much hotter.