what mass of cu(s) is electroplated by running 16.0 a of current through a cu2 (aq) solution for 4.00 h ?

Isotopes - Common elements of the living organisms are Nitrogen, oxygen, phosphorus, sulphur and carbon. These are the 6 most knowing common elements. It's included more then 95% to 97% mass on a human body.

What is isotopes?
Isotopes are two or more different atom types that share the very same atomic number as well as position in the periodic table but have different numbers of neutrons in their nuclei, resulting in different nucleon numbers. Although the chemical properties of each isotope of a given element are nearly identical, they differ in their atomic masses as well as physical characteristics. The word "isotope" is derived from the Greek words "isos" and "topos," both of which mean "the same place." As a result, the name refers to the fact that various isotopes of a given element occupy the very same spot on the periodic table. In 1913, Scottish physician and author Margaret Todd suggested the term to British chemist Frederick Soddy.

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The state at which thermodynamic parameters are usually calculated for compounds is the standard state, which is defined as the state of a substance at a pressure of 1 bar (or 1 atm) and a temperature of 25°C (298.15 K), for gases, and a concentration of 1 M, for solutions.

The reason for defining a standard state is to allow for a consistent comparison of thermodynamic properties of different substances under the same conditions. By using a standardized state, it is possible to calculate and compare thermodynamic parameters such as enthalpy, entropy, and Gibbs free energy for different compounds, and to make predictions about the feasibility and spontaneity of chemical reactions.

It should be noted, however, that the actual values of thermodynamic parameters for a compound may vary somewhat with conditions such as temperature, pressure, and concentration. Thus, when performing actual experiments or calculations, it is important to take into account the specific conditions and adjust the parameters accordingly. Nonetheless, the standard state provides a useful reference point for comparing and understanding the thermodynamic properties of different compounds.

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The repulsion of the electron pair surrounding the core atom has a significant impact on the geometry or shape of the electron.

The tendency of the electron pairs in an atom to repel one another when they are present is known as electron pair repulsion.

The more repulsion there is between the electron pairs, the more the electrons want to organize themselves to lessen it.

Here, the issue of how electron pair repulsion affects molecule geometry is raised.

The fundamental explanation is that the molecule will change its structure to keep the repelling electron pair apart.

The electron pair repulsion also plays a significant role in determining molecular geometry, since molecules prefer to modify their form and geometry in response to the electron pair.

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The following is a table that matches the given buffer terminology with the correct definitions: Buffer Terminology Definitions

1. Buffer Capacity The maximum amount of a strong acid or base that can be added before a significant change in pH will occur.

2. Acid-Base Pair that only differs by one protonA substance that can act as an acid or a base but does not need to be paired with its conjugate.

3. Amphoteric SpeciesA substance that can act as an acid or a base but does not need to be paired with its conjugate.

4. Conjugate PairWhen two or more compounds are present in a solution in the same number of moles.

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The Pauli exclusion principle explains the periodic table by stating that no two electrons in an atom can have the same set of quantum numbers.

In more detail, the periodic table organizes elements based on their atomic number, which represents the number of protons in an atom's nucleus. Each element consists of a unique arrangement of electrons around the nucleus. The Pauli exclusion principle, formulated by Wolfgang Pauli, states that within an atom, no two electrons can have the same set of quantum numbers.

Quantum numbers describe various properties of electrons, such as their energy, orbital shape, and orientation. According to the principle, each electron must have a distinct combination of quantum numbers, including the principal quantum number (n), the azimuthal quantum number (l), the magnetic quantum number (m), and the spin quantum number (s). This means that in a given atom, electrons occupy different energy levels and subshells, contributing to the observed patterns in the periodic table. The principle helps explain the filling order of atomic orbitals and the organization of elements into periods and groups based on their electronic configurations. It also plays a crucial role in understanding chemical bonding and the properties of elements.

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To determine the equilibrium concentration of [A], we need to use the equilibrium constant (Kc) expression. Based on the given information, the balanced chemical equation should be:

aA ⇌ bB + cC + dD

The Kc expression would be:

Kc = ([B]^b * [C]^c * [D]^d) / ([A]^a)

Given the equilibrium concentrations and Kc value:

Kc = 0.22
[B] = 0.44 M
[C] = 0.80 M
[D] = 0.25 M

We can plug these values into the Kc expression:

0.22 = (0.44^b * 0.80^c * 0.25^d) / ([A]^a)

However, we need the stoichiometric coefficients (a, b, c, d) to solve for [A]. If you provide the complete balanced chemical equation, I can help you determine the equilibrium concentration of A.

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Answer:

Alex forgot to get a flu shot and missed two weeks of school

CH4 is the compound with the lowest boiling point.

Helium has the lowest melting temperature of all chemical elements, and carbon has the greatest melting point.

With a reduction in molecule size, the strength of the London dispersion forces also reduces Therefore, in this situation, the molecule with the fewest branches and shortest length has the smallest boiling point.

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The complete question is -

Which one of the following compounds will have the lowest boiling point?  (a) NH3 (b) C2H6 (c) CH3 (d) H2O

Answer:

mass matter

Explanation:

Explanation:

Silver is a chemical element with the symbol Ag and atomic number 47. A soft, white, lustrous transition metal, it exhibits the highest electrical conductivity, thermal conductivity, and reflectivity of any metal.

Answer:

2

Explanation:

H2O2 ➞ 2 H2O + O2

The reaction is currently not balanced because the number of atoms on the reactant side is not equal to that of the product side

Hydrogen

Reactant = 2 Product = 4

Oxygen

Reactant = 2 Product = 4

Adding 2 to H2O2 balances the reaction as the number of atoms of both elements are now balanced on both sides of the equation

2H2O2 ➞ 2 H2O + O2

Using Boyle's Law, the new volume is V2 = (11.2 L * 580 torr) / 810 torr ≈ 8.0 L.

Boyle's Law states that the pressure and volume of a gas sample are inversely proportional, as long as the temperature and the amount of gas remain constant.

In this case, the nitrogen sample occupies 11.2 liters at a pressure of 580 torr at 32°C.

To determine the volume it would occupy when the pressure is increased to 810 torr, we use the formula: V1 * P1 = V2 * P2.

By plugging in the given values, we have (11.2 L * 580 torr) / 810 torr ≈ 8.0 L.

Therefore, the nitrogen sample would occupy approximately 8.0 liters at 810 torr pressure and 32°C.

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The volume would be 3.9 L.

We can use the combined gas law to solve this problem, which states that the product of pressure and volume is directly proportional to the product of temperature and the number of moles of gas, assuming constant pressure and temperature:

\((P1V1) / (T1) = (P2V2) / (T2)\)

where P1, V1, and T1 are the initial pressure, volume, and temperature, respectively, and P2 and V2 are the final pressure and volume, respectively.

Substituting the given values, we get:

\((580 torr)(11.2 L) / (305 K) = (810 torr)(V2) / (305 K)\)

Solving for V2, we get \(V2 = (580 torr)(11.2 L)(810 torr) / (305 K)(305 K) = 3.9 L.\)

Therefore, the volume of nitrogen would be 3.9 L if the pressure were increased to 810 torr at 32°C.

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The correct answer to the addition of the given number will be D. 5,610.3 based on the rules for addition with significant figures.

We have to find the addition of:

35.7 + 432.33 + 5,142.312 = 5,610.342

However, according to the rule for significant figures, if the addend with the fewest decimal places is 1, the final consequent will also have one decimal place. If the lowest addend is 2, the final consequent will have two decimal places, and so on.

Because significant numbers are established in the form of digits, they are also known as significant digits. The number of significant digits can be determined by counting all of the values beginning with the first non-zero digit on the left. These numbers are dependable and required to represent the quantity of a length, volume, mass, measurement, and so on.

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Answer:

s+o2=so2

Explanation:

i hope it will help u

If Jake have type 1 diabetes then he needs insulin cells because his body cannot make insulin protein.

What is diabetes?

Diabetes is a chronic, metabolic disease characterized by elevated levels of blood glucose (or blood sugar), which leads over time to serious damage to the heart, blood vessels, eyes, kidneys and nerves.

The most common diabetes symptoms experienced by many people with diabetes are increased thirst, increased urination, feeling tired and losing weight. In Type 1 diabetes, body cannot make insulin whereas in type 2 diabetes, body can make insulin but can't use it properly.

Therefore, if Jake have type 1 diabetes then he needs insulin cells because his body cannot make insulin protein.

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Answer:

SiCl4 + H2O = SiO2 + HCl

Reactant. product

Si = 1 atom Si = 1 atom

Cl = 4 atom Cl = 1 atom

H = 2 atom H = 1 atom

O = 1 atom O = 2 atom

SiCl4. + 2H2o = SiO2 + 4hcl

Reactant. product

Si = 1 atom Si = 1 atom

Cl = 4 atom Cl = 4 atom

H = 4 atom H = 4 atom

O = 2 atom O = 2 atom

Balanced chemical equation.

Carrying capacity, or the maximum number of individuals that an environment can sustain over time without destroying or degrading the environment, is determined by a few key factors: food availability, water, and space

Answer:

B. Building new bike paths in the city.

Explanation:

Answer:

–253.5 °C

Explanation:

We'll begin by calculating the number of mole in 6 g of CO₂. This can be obtained as follow:

Molar mass of CO₂ = 12 + (2×16)

= 12 + 32

= 44 g/mol

Mass of CO₂ = 6 g

Mole of CO₂ =.?

Mole = mass / molar mass

Mole of CO₂ = 6 / 44

Mole of CO₂ = 0.136 mole

Next, we shall convert 225 mL to L.

1000 mL = 1 L

Therefore,

225 mL = 225 mL × 1 L / 1000

225 mL = 0.225 L

Next, we shall determine the temperature of the gas. This can be obtained as follow:

Pressure (P) = 0.855 atm

Volume (V) = 0.225 L

Number of mole (n) = 0.136 mole

Gas constant (R) = 0.0821 atm.L/Kmol

Temperature (T) =?

PV =nRT

0.855 × 0.255 = 0.136 × 0.0821 × T

0.218025 = 0.0111656 × T

Divide both side by 0.0111656

T = 0.218025 / 0.0111656

T = 19.5 K

Finally, we shall convert 19.5 K to degree celsius (°C). This can be obtained as follow:

T(°C) = T(K) – 273

T(K) = 19.5 K

T(°C) = 19.5 – 273

T(°C) = –253.5 °C

Therefore, the temperature of the gas is –253.5 °C

Answer:

Oxidized : CO

Reduced: Fe

Oxidizing agent: Fe2O3

Reducing agent: CO

Explanation:

Loss of electrons is oxidation while gaining of electrons is reduction.

CO is a reducing agent, Fe2O3 is an oxidizing agent.

Each carbon atom is oxidized in CO. CO is the reducing agent

Each Fe atom in FeO3 is reduced. FeO3 is the oxidizing agent

Explanation:

(1) The mechanism of the reaction between propene and hydrogen bromide to give 2-bromopropane is as follows:

Protonation of the alkene: A proton from hydrogen bromide (HBr) attacks the alkene, forming a carbocation intermediate.

Bromine addition: Bromine (Br) adds to the carbocation intermediate to form an intermediate bromonium ion.

Deprotonation: A proton from the bromonium ion is removed by a water molecule or another molecule, producing the final product 2-bromopropane.

The mechanism can be represented using curly arrows as follows:

H,C

H

c=c

H

H

H-Br

CH, H

H-C-C-H

Br H

CH, H

1 1

H-C-C-H

Br H

2-bromopropane

(2) 2-bromopropane is the main product of this reaction because of the stereochemistry of the reaction. When the carbocation intermediate forms, the bromine atom has a preference for adding to the face of the alkene that has the least number of hydrogen atoms. This leads to the formation of the 2-bromopropane, which has the bromine atom attached to the carbon atom with two hydrogen atoms. On the other hand, the formation of 1-bromopropane, which has the bromine atom attached to the carbon atom with three hydrogen atoms, is less favorable. This is why 2-bromopropane is the main product of this reaction.

The sign of the enthalpy change involved in the reaction is negative and the sign of work done is also negative.

A reaction takes place in a flexible container initially at 298 K  and volume 3L .then reaction takes place causes decrease in the volume to 2.5L and its temperature becomes 273 K.

    T1 = 298 K

    V1 = 3 L

    V2 = 2.5 L

    T2 = 273 K

The Enthalpy change is the name given to the amount of heat evolved or absorbed in a reaction carried out at constant pressure. It is given the symbol ΔH.

       H = U+PV

sign of enthalpy change involved in the reaction,

Volume decreases --> PV will decrease

T decreases --> change in energy decreases

so the enthalpy change must be negative, since the change or content of energy is getting lower and same in work done.

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The first step is to write the combustion reaction of hexane:

Now, we can use Avogadro's Number to find the amount of moles of hexane and O2 that are reacting:

Using the stated reaction we can determine the amount of moles of O2 that react with 0.43 moles of hexane:

From this we can conclude that the limiting reactant is the O2, which means that we have to use the amount of O2 to make the calculations. Use this amount and the stoichiometric ratio of O2 and H2O to find the amount of water produced from 1.16moles of oxygen:

Now, we can use Avogadro's number to convert the amount of moles produced to molecules:

It means that 5.12x10^23 molecules of water are produced.

Answer:

The individual substances in a mixture can be separated using different methods, depending on the type of mixture. These methods include filtration, evaporation, distillation and chromatography.

Explanation:

The balanced equation for the combustion of butane with the smallest whole numbers possible is:

2C4H10 + 13 O2 → 8 CO2 + 10 H2O.

Note that this equation is balanced because there are an equal number of atoms of each element on both sides of the equation.

The balanced equation for the combustion of butane with the smallest whole numbers possible is:

C4H10 + 13/2 O2 → 4 CO2 + 5 H2O.

However, since we need whole numbers, we can multiply the entire equation by 2 to achieve this:

2(C4H10) + 13(O2) → 8(CO2) + 10(H2O)

So, the final balanced equation with whole numbers is:

2C4H10 + 13O2 → 8CO2 + 10H2O

The equation shows that when two molecules of butane (C4H10) react with 13 molecules of oxygen (O2), they produce eight molecules of carbon dioxide (CO2) and 10 molecules of water (H2O).

The coefficients in front of each compound represent the number of molecules involved in the reaction.

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The small stretches on a chromosome  of a deoxyribonucleic acid (DNA) molecule on a particular site is known as gene.

Gene is a fundamental, structural and operational component of heredity in living beings. They serve as a blueprints for synthesis of proteins. Genes are responsible for transfer of traits from parents to the progeny.

The sequence of nucleotide on a DNA strand determines the coding for various proteins. From a few hundred DNA bases to more than 2 million bases, genes range in size. Every human contains two copies of same gene, one from each parent.

Protein-coding genes make up only around 1% of DNA; the remaining 99% is non-coding genes. There are no protein-making instructions in non-coding part of DNA.

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