The average atomic mass of copper is 63.55 amu. If the only two isotopes of copper have masses of 62.94 amu and 64.93 amu, what are the percentages of each?
Please show work!!!

Answer:

D

Explanation:

Oxygen is an element.

sugar is a hydrocarbon derivative.

water is a compound made of hydrogen and oxygen. There are no metals in it at all.

So you are left with Halite. The common name for halite is salt. The chemical formula is NaCl

Answer: D

An aqueous solution of bismuth nitrate (bi(no3)3) was electrolyzed until 35 grammes of metallic bismuth was plated out at the cathode, requiring 0.5023 faradays of power to have travelled through the cell.

Moles of Bi are equal to mass/molar mass, which is 35/209 = 0.167 mol.

Electrons per mole of bivalent ion = 3 * 0.167 = 0.5023 mol

1 mol of electrons has a charge of 1 F.

Charge equals 0.5023 moles per f.

The faraday is a dimensionless measure of the amount of electric charge, or roughly 6.02 x 1023 electric charge carriers. This is also referred to as Avogadro's constant and is equivalent to one mole for aqueous solution.

The coulomb (C) is the most popular unit for measuring the amount of electric charge in the International System of Units (SI). It is about similar to 6.24 × 1018 electric charge carriers and equal to one ampere-second (1 A s).

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Answer: \(Mg(s)+Zn(NO_3)_2(aq)\rightarrow Mg(NO_3)_2(aq)+Zn(s)\)

Explanation:

Complete ionic equation : In complete ionic equation, all the substance that are strong electrolyte and present in an aqueous are represented in the form of ions.

Net ionic equation : In the net ionic equations, we do not not include the spectator ions in the equations.

Spectator ions are the ions present on reactant and product side which do not participate in a reactions. The same ions present on both the sides.

The equation given is:

\(Mg(s)+Zn^{2+}+2NO_3^-\rightarrow Mg^{2+}+2NO_3^-+Zn(s)\)

The complete molecular equation will be:

\(Mg(s)+Zn(NO_3)_2(aq)\rightarrow Mg(NO_3)_2(aq)+Zn(s)\)  

The complete ionic equation of\(\rm Mg(s) + Zn^{2+} + 2NO_3 \rightarrow Mg^{2+} + 2NO_3 + Zn(s)\) is\(\rm Mg(s) + Zn^{2+} \rightarrow Mg^{2+} + Zn(s)\). So, option A is right.

A complete ionic equation shows all of the ions that are present in a reaction, including the spectator ions. In this reaction, magnesium metal (Mg(s)) reacts with zinc(II) ions (\(\rm Zn^2+\)) to form magnesium(II) ions (\(\rm Mg2+\)) and zinc metal (Zn(s)).

The balanced molecular equation for this reaction is:

\(\rm Mg(s) + Zn(NO_3)_2(aq) \rightarrow Mg(NO_3)_2(aq) + Zn(s)\)

The complete ionic equation is:

\(\rm Mg(s) + Zn^{2+}(aq) \rightarrow Mg^{2+}(aq) + Zn(s)\)

The spectator ions are the nitrate ions (\(\rm NO_3^-\)), which are present on both sides of the equation. They do not participate in the reaction, so they are not included in the complete ionic equation.

The other choices are incorrect because they do not show all of the ions that are present in the reaction.

Therefore, the answer is A. \(\rm Mg(s) + Zn^{2+} \rightarrow Mg^{2+} + Zn(s)\).

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The Vant Hoff factor as\(K_2}\)S break into in water is 3

What does vant Hoff factor mean?

The ratio of a substance's mass concentration to the concentration of the particles that are produced when it dissolves is known as the Van't Hoff factor. The Van't Hoff factor describes how much a substance associates or dissociates in a solution.

The ratio of the final moles following dissociation or association to the beginning moles before to dissociation or association of an electrolyte in a solution is known as the Van't Hoff factor. The solute's property governs the number of particles, which is independent of the solution's concentration.

\(K_2}\)S ⇒ 2K+ + \(S_2}\)-

\(K_2}\)S dissolves into 3 particles .

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The Vant Hoff factor as \(K_{2}S\) break into in water is 3

What does vant Hoff factor mean?

The ratio of a substance's mass concentration to the concentration of the particles that are produced when it dissolves is known as the Van't Hoff factor. The Van't Hoff factor describes how much a substance associates or dissociates in a solution.

The ratio of the final moles following dissociation or association to the beginning moles before to dissociation or association of an electrolyte in a solution is known as the Van't Hoff factor. The solute's property governs the number of particles, which is independent of the solution's concentration.

\(K_{2}S\) ⇒ 2K+ + -\(S_{2}\)

\(K_{2}S\) dissolves into 3 particles .

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The equations that best represents the species that react and the species that are produced when CaCO3(s) and HCl(aq) are combined is 2H+ (aq) + CaCO3 (s) yields Ca2+ (aq) + H2O (l) + CO2 (g)

Option B is correct.

A chemical equation is described as the symbolic representation of a chemical reaction in the form of symbols and chemical formulas.

The chemical equation is very important as it tells us about the reacting species and resulting product.

The coefficient of the reacting species and resulting products gives us information about the mole ratio or molecular ratio of the elements or compounds in the reaction.

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Water has the highest latent heat of vaporization of any known liquid. it is true.

The quantity of energy required to turn a portion of a liquid substance into a gas has been known as the enthalpy of vaporization, commonly referred to as the evaporation process or heat of evaporation. The pressure where the transformation occurs determines the enthalpy of vaporization.

The highest known temperature at which water vaporizes. The heat of vaporization is the amount of energy required to vaporize 1 g of a liquid without causing the liquid's temperature to go up.

Therefore, the given statement is true.

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Answer:prokaryotes

Explanation:

Answer:

Atoms can gain, lose, or share electrons during a chemical change. Chemical changes do not affect the nucleus of an atom. For this reason, an atom has the ability to retain its properties or identity even if the number of electrons is different. Therefore, the atom's identity won't change.

Explanation:

Answer:

It is because when a solid turns into a liquid it needs heat. So when ice melts there has to be heat in order to make it melt.

Explanation:

hope this helped!

To address the crevice corrosion issue in the high-pressure connectors and piping of the SWRO plant, several remedies can be considered, A SWRO (Sea Water Reverse Osmosis) plant is a water desalination facility that uses reverse osmosis technology to treat seawater or brackish water and produce freshwater

Material Selection: Evaluate the material compatibility with the operating conditions, especially the chloride ion concentration and temperature. Consider using corrosion-resistant alloys such as duplex stainless steel (e.g., 2205) or super duplex stainless steel (e.g., 2507) that have better resistance to chloride-induced corrosion compared to 316L or 317L stainless steel.

Surface Treatment: Apply appropriate surface treatments to enhance corrosion resistance. Passivation or pickling can remove surface contaminants and create a protective oxide layer on the metal surface, reducing the susceptibility to corrosion.

Design Modifications: Evaluate the design of the connectors and piping to minimize crevices and stagnant areas where corrosion can occur. Smooth transitions, avoiding sharp angles or crevices, can help promote better fluid flow and prevent the accumulation of corrosive substances.

Cathodic Protection: Implement cathodic protection methods, such as impressed current or sacrificial anodes, to protect the connectors and piping from corrosion. This technique involves introducing a more easily corroded metal (anode) to the system, which sacrifices itself to protect the connected metal (cathode) from corrosion.

Monitoring and Maintenance: Regularly monitor the corrosion levels and condition of the connectors and piping. Implement a maintenance program that includes periodic inspections, cleaning, and repairs, if necessary, to prevent corrosion from progressing.

It is important to consult with corrosion experts and engineers who specialize in SWRO plant operations to assess the specific conditions, perform material testing, and provide tailored solutions to mitigate the crevice corrosion problem effectively.

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If the reaction started with 32g of Sulfur and 56 grams of Iron, then mass of produced FeS is 88 grams.

Relation between the mass and moles of any substance will be represented as:

n = W/M, where

Moles of Fe = 56g / 56g/mol = 1 mol

Moles of S = 32g / 32g/mol = 1 mol

Given chemical reaction is:

Fe + S → FeS

From the stoichiometry of the reaction same moles of iron and sulfur are required to produce equal moles of iron sulfide. Means 1 mole of iron produces 1 moles of iron sulfide and mass of iron sulfide will be calculated as:

W = (1mol)(88g/mol) = 88g

Hence required mass of iron sulfide is 88 grams.

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Answer: is C

Explanation:

Answer:

3.14

Explanation:

pH=-log(H+)

- Hope that helps! Please let me know if you need further explanation.

Answer:

c

Explanation:

H3C•O=(c•CH3 can interact with other like molecules through only only dispersion forces and dipole dipole forces. option B is correct.

The force of dipole dipole creates because of the presence of polar compounds and they are responsible for the polarization too and dispersion forces are weak molecular forces of interaction.

H3C•O=(c•CH3 is known as acetone and due to the presence of oxygen they form one polar bond due to the presence of lone pair on the oxygen atom and oxygen is the electronegative element too.

Acetone will form dispersion force as carbon and hydrogen are of similar electronegativities so they are bounded with dispersion force and not very polar.

Therefore, H3C•O=(c•CH3 can interact with other like molecules through only only dispersion forces and dipole dipole forces. option B is correct.

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Answer:

The sun

Explanation:

The source of energy for the water cycle is the sun. In the solar system, the sun is the ultimate source of energy for the external processes.

The water cycle is powered by the energy from the sun.

In a calcium fluoride (CaF2) crystal, the ratio of calcium ions (Ca2+) to fluoride ions (F-) is 1:2. This means that for every one calcium ion, there are two fluoride ions present, maintaining the overall electrical neutrality of the compound.

A calcium fluoride crystal is composed of equal numbers of calcium ions and fluoride ions, with a ratio of 1:1. The crystal structure of calcium fluoride is cubic, and each calcium ion is surrounded by eight fluoride ions, while each fluoride ion is surrounded by four calcium ions. Calcium fluoride is a naturally occurring mineral that is used in various industries, such as metallurgy, glass and ceramics, and dental applications.

It has a high melting point and is highly resistant to thermal shock, making it a useful material for high-temperature applications. In addition, calcium fluoride is known for its optical properties, such as its ability to transmit ultraviolet light, which makes it useful in lenses, prisms, and other optical components. Overall, the 1:1 ratio of calcium ions to fluoride ions in a calcium fluoride crystal is critical to its properties and applications.
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In a calcium fluoride crystal, the ratio of calcium ions to fluoride ions is 1:2. This means that for every calcium ion present in the crystal lattice, there are two fluoride ions.

This ratio is important for understanding the structure and properties of calcium fluoride, which is widely used in optics, dental treatments, and other applications. The crystal lattice of calcium fluoride is composed of positively charged calcium ions (Ca2+) and negatively charged fluoride ions (F-), which form a repeating pattern that gives the crystal its characteristic shape and properties. By understanding the ratio of calcium ions to fluoride ions in the crystal lattice, scientists can better understand and manipulate its properties for various applications.

In a calcium fluoride (CaF2) crystal, the ratio of calcium ions (Ca2+) to fluoride ions (F-) is 1:2. This means that for every one calcium ion, there are two fluoride ions present. This stoichiometric ratio is essential for maintaining charge neutrality in the crystal lattice, as the positive charge of the calcium ion is balanced by the combined negative charges of the two fluoride ions. This ionic compound forms a cubic crystal lattice, resulting in a stable and ordered structure.

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answer: bits of rock rusting when exposed to oxygen and water

Explanation: i think because when it rains the water is left and freezes and night making the rock expand or start to Rust

Answer:

A. The rate of the backward reaction increases.

Explanation:

The stress caused by increasing the H2O concentration would shift the system to the left, producing more reactants to counter the stress of added H2O. This means the rate of the backward reaction would increase.

Answer:

A

Explanation:

just took the test

Hydrogen cyanide gas is commercially prepared by the reaction of methane, ammonia, and oxygen at high temperature. The other product is gaseous water.

Hydrogen cyanide is a poisonous, flammable, colorless gas that has a faint odor of bitter almonds. The gas has a boiling point of 26 °C (78.8 °F) and a melting point of -14 °C (6.8 °F).Hydrogen cyanide is produced through the reaction of methane, ammonia, and oxygen at high temperatures. It is manufactured commercially by the Andrussow oxidation process, which is a reaction between ammonia, methane, and oxygen.

                              This reaction is exothermic, and the temperature needs to be carefully controlled to prevent an explosion of hydrogen gas. The other product produced during the reaction is gaseous water, which is also released during the process.

                                    The hydrogen cyanide is then separated from the water by distillation. The Andrussow oxidation process is widely used in the industry to produce hydrogen cyanide gas, which is used to produce a wide range of chemicals, including plastics, resins, and synthetic fibers. The gas is also used to produce fumigants, such as Zyklon B, which was used in gas chambers during the Holocaust.

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Answer:

A pH scale is used to measure acidity.

Answer:

How acidic or alkaline a substance is.

Explanation:

1 = Strong acid e.g. Stomach acid

7 = Neutral e.g. Water

14 = Strong alkaline e.g. Sodium hydroxide

If excess \(H_2O\) is used as stated in the illustration the amount of \(Mg_3N_2\) that would be required would be 7.57 grams

From the equation of the reaction:

\(Mg_3N_2(s) + 6H_2O(l) --- > 3Mg(OH)_2(s) + 2NH_3(g)\)

Since the yield is 80% of the theoretical value, in order to make 10g, the theoretical yield would be 12.5 g.

Mole ratio of \(Mg_3N_2\) and \(Mg(OH)_2\) = 3:1

Mole of 12.5 g  \(Mg(OH)_2\) = 12.5/53.32 = 0.225moles

Equivalent mole of \(Mg_3N_2\)  = 0.124/3 = 0.075 moles

Mass of 0.0041 moles  \(Mg_3N_2\) = 0.075 x 100.95 = 7.57 grams

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Answer:

it changes color from blue to light green.

Explanation:

due to copper iron nail functions

Answer:

give the other person brainlieset plz

Explanation:

Answer:

2Mg+O=2MgO

Explanation:

32gram of reacting

Answer:15.9994 g/mol

Explanation:

The scientific question that can be answered through investigation will be:

"Which of the four types of macromolecules, and in which proportions, are present in the food sample?"

A scientific question is a question that may lead to a hypothesis and help us in. answering (or figuring out) the reason for some observation.

A scientific question simply means a question where a researcher designs a question in order to get an answer to a particular investigation.

According to this question,

Since the researcher wants to know the person responsible for the classroom good mess by determining which macromolecules are present in the mystery food sample, then the question will be "Which of the four types of macromolecules, and in which proportions, are present in the food sample?"

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Answer: During succession, new species move into an area and colonize it.

Explanation: Ecological succession refers to the process of change in the composition and structure of an ecosystem over time. It occurs due to the interactions between the biotic (living) and abiotic (non-living) components of an environment. As succession progresses, new species gradually establish and thrive in the area, leading to a change in the species composition. This process can occur over a long period of time, ranging from decades to centuries, depending on various factors such as environmental conditions and the specific type of succession.

Answer:

the problem is that Gary is not the smartest snail.the hypothesis is that he thinks he can get smarter by eating super snail food everyday.

hope this helps