If a 1.00 L solution with a [Cu?+] = 6.28 M is used to make this coin, what is the concentration of thesolution after it has been electrolyzed for 15.27 h under a current of 1.55 A?

Answer:

Chemical formula: HNO₃

Melting point: −42 °C (−44 °F; 231 K)

Molar mass: 63.012 g·mol−1

Solubility in water: Miscible

Explanation:

When Conc HNO3 acid leaks into seawater presumed to be largely consisting of Sodium Chloride and other dissolved salts, I won't consider it as a chemical reaction rather it is a Physical Change. I presume this activity as a mixture when the acid been the solute becomes a contaminants

Answer:

Can you add more context to what exactly the question is?

Explanation:

Answer:

option c

Explanation:

E = hf

E= energy

h = Planck constant

f = frequency

E = 6.6 X 10^-34 X 4 X 10^14

E = 2.64 X 10^-19J

In a beta emission, the mass number of the daughter nucleus remains unchanged while the atomic number of the daughter nucleus increases by one unit. The following are isotopes produced when the following undergo beta emission;

1) potassium-42  ------> Ca - 42

2) iodine-131 ------------> Xe - 131

3)  iron-52 ---------------> Co - 52

4)  sodium-24 -----------> Mg -24

The daughter nucleus formed after beta emission is found one place after its parent in the periodic table.

Regarding the stability of the daughter nuclei, a nucleus is unstable if the neutron-proton ratio is less than 1 or greater than 1.5.

Hence, the following daughter nuclei are stable; Ca - 42, Xe - 131, Mg -24.

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Answer:

rocks beneath the surface melt seems like the answer that makes the most sense

Answer:

Rocks beneath the surface melt

Explanation:

Answer: The second reaction took place at a higher temperature

Explanation:

Rate is affected by temperature, as higher temperatures cause the reacting molecules to have more energy.

Collision theory states that in order for a reaction to occur, each reacting molecule must collide with one another in the correct orientation and with enough energy, called the activation energy.

A higher energy caused by a higher temperature will cause the molecules to collide much more frequently, leading to a higher chance of a successful collision, and with more energy to satisfy the activation energy.

Therefore, the second reaction must have taken place at a higher temperature, since the molecules had more energy than the first reaction leading to a higher rate of reaction, and a higher rate constant.

Answer:

The release of energy from fuels is used to make other forms of

energy. When gasoline burns in a car engine, some of the

chemical energy in the gasoline is converted into heat. The heat

is converted into mechanical energy. The mechanical energy

moves the car .

if you know that I am right please mark it as brainliest

Answer:

It is asking for 3 energy conversions like Mechanical energy is one of them

Explanation:

The amount of energy needed to change a material from a liquid to a gas is called the heat of vaporization. This is a specific type of enthalpy change that occurs when a substance changes phase from a liquid to a gas at a constant temperature and pressure.

The heat of vaporization is a measure of the amount of energy required to break the intermolecular forces holding the molecules in a liquid phase and transform them into a gas phase.

The heat of vaporization is an important physical property of a substance and is used in various fields, such as thermodynamics, chemical engineering, and material science, to understand the behavior and properties of substances in different states.

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Answer:

1)RADICLE ->It is the embryonic root of the plant.

PLUMULE ->It is the embryonic shoot of the plant.

2)RADICLE ->It grows downwards into the soil.

PLUMULE ->It grows upwards into the air.

3)RADICLE ->Radicle is the first part of the seedling.

PLUMULE -> Plumule grows after the radicle.

4)Radicles are negatively phototropic. Plumule is positively phototropic.

i am glad i helped

Answer:The strength of the gravitational force between two objects depends on two factors, mass and distance. the force of gravity the masses exert on each other.

Explanation: i hope it answers your question

Answer:

blah blah blah

Explanation:

There are 8 photons will be involved in the transfer of 4 electrons from psii to 2 nadp.

The photon of light energy moves till it encounters a chlorophyll molecule. An electron inside the chlorophyll is "activated" by the photon. The electron is provided energy, which enables it to separate from a chlorophyll molecule atom. Therefore, it must be claimed that chlorophyll "donates" an electron.

NADP+, the last electron receiver for linear photosynthesis, needs two electrons to become NADPH. There are 2 NADPH created for every 8 photons (4 to PS-I & PS-II each).

Therefore, there are 8 photons will be involved in the transfer of 4 electrons from psii to 2 nadp.

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Answer:

C

Explanation:

d=300

t=6hr

speed=?

speed=300/6

speed=50m/hr the important thing in this question is to get the right units

The properties of water that greatly affect the happenings on Earth include:

A. its polarity and ability to bond

B its ability to change physical state

C. its power to dissolve solids

D. its capacity to store heat

The properties of water that greatly affect the happenings on Earth include:

A. Its polarity and ability to bond: Water's molecular structure, consisting of two hydrogen atoms and one oxygen atom, gives it a polar nature. This allows water molecules to form hydrogen bonds with each other, which significantly impacts various processes on Earth.

B. Its ability to change physical state: Water can exist in three physical states - solid (ice), liquid (water), and gas (water vapor). This ability plays a crucial role in Earth's climate, weather, and various natural processes, such as the water cycle.

C. Its power to dissolve solids: Water is known as the "universal solvent" because it can dissolve a wide range of substances. This property allows it to carry essential nutrients to different parts of the Earth, facilitating life and various ecological processes.

D. Its capacity to store heat: Water has a high heat capacity, meaning it can absorb and store a large amount of heat. This property helps moderate Earth's temperature, making the planet more habitable for life.

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Answer:

there are 3 bonded atoms in carbon monoxide and a total of 6 electrons

Answer: There are a total of two bonded atoms in carbon monoxide: one carbon atom and one oxygen atom. There are no lone pairs in carbon monoxide.

Explanation:  Carbon monoxide, or CO, is a chemical compound made up of one carbon atom bonded to one oxygen atom. The molecule has a linear shape, with the carbon atom at one end and the oxygen atom at the other end. There are a total of two bonded atoms in carbon monoxide: one carbon atom and one oxygen atom.

In terms of lone pairs, or non-bonding electrons, carbon monoxide has none. Lone pairs are pairs of electrons that are not involved in bonding, and they are typically found in the outermost electron shell of an atom. In carbon monoxide, all of the electrons are either bonded to the other atom in the molecule or are involved in bonding to that atom. Therefore, there are no lone pairs in carbon monoxide.

Answer:

10 Things That Indicate a Chemical Change Is Occurring

Gas Bubbles Appear. Gas bubbles appear after a chemical reaction has occurred and the mixture becomes saturated with gas. ...

Explanation:

7 signs that a chemical change is taking place are change in color, formation of a gas, formation of a precipitate, change in odor, change in temperature, something is burning and light is being produced.

Chemical synthesis, or, alternatively, chemical breakdown into two or more separate molecules, occurs when one material reacts with another to create a new substance. These processes are referred to as chemical reactions, and they are typically irreversible barring additional chemical reactions.

When students get familiar with the five fundamental types of chemical reactions' synthesis, breakdown, single replacement, double replacement, and combustion, doing this becomes much simpler for them to do.

A chemical transformation is one in which one or more new compounds are created. Chemical reactions are another name for a chemical transformation. Examples include burning any stuff and iron rusting.

Thus, 7 signs that a chemical change is taking place are change in color, formation of a gas, formation of a precipitate, change in odor, change in temperature, something is burning and light is being produced.

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Answer:

a) Chlorine Trifluoride

b) Dichlorine Heptoxide

GOOD LUCK FOR FUTURE! :)

The ratio indicates that the hydrogen ion concentration of chemical A is 0.158 times lower than that of chemical B. Alternatively, the hydrogen ion concentration of chemical B is 6.31 times more acidic than that of chemical A.

The pH value of a substance is an essential indicator of its acidity or alkalinity. The pH scale ranges from 0 to 14. The midpoint of the scale is 7.0, which is neutral. Solutions with pH values below 7.0 are acidic, while those with pH values above 7.0 are alkaline.

Acid solutions have a high concentration of hydrogen ions. The negative logarithm of the hydrogen ion concentration (H+) is referred to as the pH. Similarly, solutions with a high hydroxide ion concentration have high pH values. The formula for pH is pH = -log[H].

1. Calculation of [H+] for Chemical A:Hence, we can rearrange the pH equation to calculate the hydrogen ion concentration as follows:[H] = 10^-pH= 10^-9= 1.0 × 10^-9 mol/L2. Calculation of [H+] for Chemical B:pH = -log[H]log[H] = -pHlog[H] = -8.2[H] = 10^-pH[H] = 6.31 × 10^-9 mol/L3.

Calculation of the ratio of [H+] for Chemical A and Chemical B:The ratio of [H+] for chemical A to that of chemical B can be found using the following formula:Ratio = [H+] of Chemical A / [H+] of Chemical B= (1.0 × 10^-9) / (6.31 × 10^-9)= 0.158The ratio indicates that the hydrogen ion concentration of chemical A is 0.158 times lower than that of chemical B. Alternatively, the hydrogen ion concentration of chemical B is 6.31 times more acidic than that of chemical A.

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Atoms are the basic building blocks of matter, and since atoms are indestructible, the matter they comprise of is conserved.

We use moles when determining amounts of reactants and products in a reaction because moles allow us to express amounts of substances in terms of the number of atoms or molecules present.

What is molecules?
Molecules are the smallest units of a chemical compound that can exist on its own. They are made up of two or more atoms bonded to each other, forming a unique chemical structure. Molecules are the building blocks of all matter, and they can be found in nature as well as in artificially created compounds. Molecules can be simple or complex, and they can range in size from a few atoms to millions of atoms. They interact with each other, giving rise to chemical reactions. Molecules are essential to life, and understanding how they interact is essential to understanding chemistry.

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Answer:

true...

Explanation:

It will take approximately 35.4 years for both Cs-137 and Co-60 isotopes to decay until their activities are equal.

To determine the time it takes for both Cs-137 and Co-60 isotopes to decay until their activities are equal, we can use the decay function for each isotope and set them equal to each other.

The decay function for a radioactive isotope is given by:

A(t) = A₀ * exp(-λt)

Where:

A(t) is the activity at time t,

A₀ is the initial activity,

λ is the decay constant,

t is the time.

The decay constant (λ) can be calculated using the half-life (T₁/₂) of the isotope:

λ = ln(2) / T₁/₂

For Cs-137, the half-life is approximately 30.17 years, and for Co-60, the half-life is approximately 5.27 years.

Let's denote the time it takes for both activities to be equal as t_eq.

For Cs-137:

A(Cs-137) = 100 * exp(-0.693 / 30.17 * t_eq)

For Co-60:

A(Co-60) = 300 * exp(-0.693 / 5.27 * t_eq)

Setting the two equations equal to each other and solving for t_eq:

100 * exp(-0.693 / 30.17 * t_eq) = 300 * exp(-0.693 / 5.27 * t_eq)

Simplifying the equation:

1/3.0 * exp(-0.693 / 30.17 * t_eq) = exp(-0.693 / 5.27 * t_eq)

Taking the natural logarithm (ln) of both sides:

-0.693 / 30.17 * t_eq = -0.693 / 5.27 * t_eq

Solving for t_eq:

t_eq ≈ 35.4 years

It will take approximately 35.4 years for both Cs-137 and Co-60 isotopes to decay until their activities are equal. This calculation assumes that there is no other source of radiation or decay affecting the activities of the isotopes.

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The molar mass of \(Al(OH)_{3}\)(Aluminum hydroxide) in its solid form is 78.00 g/mol. However molar mass of \(Al(OH)_{3}\) in solution form can vary based on the concentration of the solution, as well as other factors such as temperature and pressure.

The molar mass of a substance is the mass of one mole of that substance, expressed in grams per mole. The molar mass of \(Al(OH)_{3}\)with solution is a measure of the amount of the substance present in a solution.

\(Al(OH)_{3}\) is the chemical formula for aluminum hydroxide, a compound that is commonly used as an antacid or as a component in the treatment of wastewater.

The molar mass of a compound is the sum of the atomic masses of all the atoms in a single molecule of the compound. The molar mass of \(Al(OH)_{3}\) can be calculated by adding up the atomic masses of one aluminum atom, three oxygen atoms, and three hydrogen atoms. The result is a molar mass of approximately 78 grams per mole.

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Answer:

that the polar bear will come out again in 2 years

Answer:

In this activity, we will pretend that nuts, washers and bolts are 3 kinds of elements. A single washer represents an atom of WASHER. A single nut represents an atom of NUT and a single bolt represents an atom of BOLT. Atoms can be put together to form compounds.

Answer:

compound its that easy well i gotta go

The Molality of the aqueous sodium acetate,NaC2H3O2 solution  is  0.298m.

Molality is defined as the amount of solute expressed in the number of moles present per kilogram of solvent. The units of molarity are mol/kg. The formula used to calculate molality is ,

Molality of the solution=moles of the solute /mass of the solvent

An aqueous sodium acetate solution is made by dissolving 0.185 mole NaC2H3 in 0.620 kg of water. here solvent is the water and solution is sodium acetate.

Moles of NaC2H3O2 = 0.185 mole

Mass of solvent  = 0.620 kg

putting all values in the expression of molality we get,

Molality of NaC2H3O2 = 0.185 mole / 0.620

                                        =0.298m

Hence, the molality of  solution is 0.298 m.

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There is a golden role of solubility, polar solute dissolve in polar solvent and non polar solute dissolve in non polar solvent. Therefore, it was unable to diffuse through the 20 MWCO membrane.

Solutions are a homogeneous mixture of two or more substances. A solution is a homogeneous mixture of solvent and solute molecules. Solvent is a substance that is in large amount in solution. solute is the substance which is in small amount in a solution. There are two types of mixture that is homogeneous and heterogeneous. Solution is a homogeneous solution.

Lee molecular weight of urea is 60.07 . It was unable to diffuse through the 20 MWCO membrane due to urea being unable to fit through the pores of the membrane.

Therefore, it was unable to diffuse through the 20 MWCO membrane.

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Answer:

The answer I believe is B. Erosion

Explanation:

Just sounds better than all the other choices.

Answer:

erosion b

Explanation:

it breaks down the rocks i remembered this in 4th grade :)

Answer:

have a negative electrical charge of one (-1)

Explanatio

Electrons have an electrical charge of negative one. When you think electron, always think -1

Answer:

When the charcoal burned, it turned into a gas which caused the mass to change.

Explanation:

A black coloured formed by the intense heating of the plants and trees and other materials under a certain temperature and pressure to remove the water content is called charcoal.

The charcoal was burned and turned into a gas causing change to the mass.

A principle of physics and chemistry states that in a closed system the transfer of mass and energy will remain constant and no atoms or molecules will be annihilated or produced during a chemical reaction.

When the charcoal is burned on the grill ash is created and the weight of the ash is less than that of charcoal compared to that before being burned as some amount of gas was also created and the mass of the ash changed.

Thus, the mass of ash is reduced.

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Potassium chloride and iron III hydroxide are produced through the reaction of iron III chloride and potassium hydroxide.

A potassium salt used to treat hypokalemia is potassium chloride. a white crystal or crystalline powder used in buffer solutions, fertilizers, explosives, the treatment of hypokalemia, replenishing electrolytes, and other applications.

It is a kind of electrolyte that supports cardiac control, muscular contraction, neuron function, and more. Low potassium levels can be treated with a supplement called potassium chloride. Hypokalemia, which can be dangerous, can be brought on by low potassium.

Potassium chloride used intravenously is not without risk. Injecting it too quickly or using a large dose could result in cardiac arrest within minutes. Virtually any arrhythmia may be seen as a result of hyperkalemia's complicated effects on the heart.

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Answer:

thank u for the points

Explanation: