how long must a constant current of 50.0 a be passed through an electrolytic cell containing aqueous cu2 ions to produce 5.00 moles of copper metal?

The volume of the box = 168 cm³

Volume is a derivative quantity derived from the length of the principal

The unit of volume can be expressed in liters or milliliters or cubic meters

The volume of the box can be formulated :

\(\tt \boxed{\bold{V=length\times width\times height}}}\)

Dimensions of the box:

Length=12 cm

Width=12 cm

Height=12 cm

so the volume :

\(\tt V=12\times 2\times 7\\\\V=\boxed{\bold{168~cm^3}}\)

Answer:

20C is warmer.

Explanation:

20C is 68 fehrenheit

20K is -423.67 fahrenheit

The theoretical cell potential for the first second cell are 0.1915 V and 0.088 V respectively

ln is the natural logarithm

Q is the reaction quotient

The reaction occurring at each half-cell is written as:

Ag⁺ + e⁻ → Ag

For the first cell, the concentration of silver ions is 0.01 M.

Equilibrium constant, K = [Ag⁺]/[Ag] = 0.01/1.79 × 10⁻¹⁰

The reaction quotient, Q = [Ag⁺]/[Ag] = 0.01/1.79 × 10⁻¹⁰

Cell potential,E = E° - (RT/nF) * ln

Q= 0.80 - (8.31 × 298)/(1 × 96,485) * ln(0.01/1.79 × 10⁻¹⁰)= 0.80 - (0.0257) * 23.92= 0.1915 V

Therefore, the theoretical cell potential for the first cell is 0.1915 V.

For the second cell, the concentration of silver ions is 0.001 M.

Equilibrium constant, K = [Ag⁺]/[Ag] = 0.001/1.79 × 10⁻¹⁰

The reaction quotient, Q = [Ag⁺]/[Ag] = 0.001/1.79 × 10⁻¹⁰

Cell potential,E = E° - (RT/nF) * lnQ= 0.80 - (8.31 × 298)/(1 × 96,485) * ln(0.001/1.79 × 10⁻¹⁰)= 0.80 - (0.0257) * 30.12= 0.088 V

Therefore, the theoretical cell potential for the second cell is 0.088 V.

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The reaction takes place in acidic solution, which provides the necessary H+ ions for the reduction of Ni₂+ to Ni. The reaction takes place in acidic solution, which provides the necessary H+ ions for the oxidation of MnO₂ to MnO₄-, and in the presence of hydroxide ions, which are required for the reduction of MnO₄- to MnO₂. The reaction takes place in acidic solution, which provides the necessary H+ ions for the reduction of H₂SO₃ to HSO₄-. The reaction takes place in basic solution, which provides the necessary OH- ions for the oxidation of Cl₂ to ClO₃-.

A. Ni+(aq) ? Ni₂+(aq) + Ni(s) (acidic solution)

This disproportionation reaction involves nickel ions in both +1 and +2 oxidation states. The balanced equation for the reaction is:

2Ni+(aq) + 2H₂O(l) ? Ni₂+(aq) + Ni(s) + 4H+(aq) + O₂(g)

In this reaction, Ni₂+ is reduced to Ni, while Ni+ is oxidized to Ni2+ and O₂ is also produced. The reaction takes place in acidic solution, which provides the necessary H+ ions for the reduction of Ni₂+ to Ni.

B. MnO₂(s) ? MnO₄-(aq) + MnO₂(s) (acidic solution)

This disproportionation reaction involves manganese ions in both +4 and +7 oxidation states. The balanced equation for the reaction is:

3MnO₂(s) + 4H₂O(l) + 2H+(aq) ? 2MnO₄-(aq) + MnO₂(s) + 8OH-(aq)

In this reaction, MnO₂ is both oxidized to MnO₄- and reduced to MnO₂. The reaction takes place in acidic solution, which provides the necessary H+ ions for the oxidation of MnO₂ to MnO₄-, and in the presence of hydroxide ions, which are required for the reduction of MnO₄- to MnO₂.

C. H₂SO₃(aq) ? S(s) + HSO₄-(aq) (acidic solution)

This disproportionation reaction involves sulfur in both +4 and +6 oxidation states. The balanced equation for the reaction is:

H₂SO₃(aq) + 2H₂O(l) ? S(s) + 2HSO₄-(aq) + 4H+(aq) + 2e-

In this reaction, H₂SO₃ is oxidized to S and reduced to HSO₄-. The reaction takes place in acidic solution, which provides the necessary H+ ions for the reduction of H₂SO₃ to HSO₄-.

D. Cl₂(aq) ? Cl-(aq) + ClO-(aq) (basic solution)

This disproportionation reaction involves chlorine in both 0 and -1 oxidation states. The balanced equation for the reaction is:

3Cl₂(aq) + 6OH-(aq) ? 5Cl-(aq) + ClO₃-(aq) + 3H2O(l)

In this reaction, Cl2 is reduced to Cl-, while Cl₂ is oxidized to ClO₃-. The reaction takes place in basic solution, which provides the necessary OH- ions for the oxidation of Cl₂ to ClO₃-.

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Answer:

Maybe Write about the meaning and causes?

Explanation:

:)

Answer:

Land is considered as an important resource as it provides habitation to a wide variety of flora and fauna. It is also used by human beings for various purposes such as agriculture, forestry, mining, building houses and roads, and setting up industries.

Answer:

Low melting point

Explanation:

Transition metals have the following properties:

Conductivity (Electrical and Thermal)

Malleability (You can hit it with a hammer to mold it)

High melting point

Answer:

Low melting point

Explanation:

Most transition metals property is high melting point.

At 218 °C, solid NH₄SH decomposes to form 0.011 M NH₃ and H₂S, as given by its equilibrium constant.

The equilibrium constant (Keq) is the ratio of the product of the concentrations of the products to the product of the concentrations of the reactants, all raised to their stoichiometric coefficients.

Only gases and aqueous species are included.

        NH₄SH(s) ⇋ NH₃(g) + H₂S(g)

I                                 0           0

C                               +x          +x

E                                x            x

Keq = 1.2 × 10⁻⁴ = [NH₃] [H₂S] = x²

x = 0.011 M

At 218 °C, solid NH₄SH decomposes to form 0.011 M NH₃ and H₂S, as given by its equilibrium constant.

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Significant figures are important because they indicate the precision of a measurement.

Precision:

The precision of a substance is defined as the degree to which two or more measurements agree with one another. It is incredibly precise but not always accurate to measure something if you weigh it five times and get 3.2 kg each time. Accuracy is not necessary for precision. You can learn how to be accurate but not precise by looking at the examples below. There are various categories of precision:

Repeatability:

The fluctuation that results from taking multiple measurements under the same circumstances in a short amount of time.

Reproducibility:

The variation occurs when several instruments, operators, and longer time periods are used in the same measurement process.

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All of the amino acids could form a hydrogen bond with another amino acid in the chain to stabilize the secondary structure of a b-pleated sheet.

Protein is composed of amino acid linked with peptide bond.

Hydrogen bond is an electrostatic attraction between two polar groups that occurs when a hydrogen atom (H), covalently bound to a highly electronegative atom such as flourine (F), oxygen (O) and nitrogen (N) atoms.

In a beta-pleated sheet, hydrogen bonds are formed between carbonyl and amino groups of backbone (see the picture below).

Usually, amino acid proline is found in the edge strands in beta-sheets. Beta-branched amino acids valine, threonine and isoleucine and aromatic amino acid residues tryptophan, tyrosine and phenylalanine are found middle of beta-sheets.

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Answer:

1.) Are tightly coiled bundles of DNA

2.) Carry many genes

3.) Are found inside the nucleus of eukaryote

4.) Can be used to diagnose genetic disorders

Explanation:

A chromosome is a thread-like structure made up of DNA. The chromosomes are made of DNA which are tightly coiled around protein.

Chromosomes carry hundreds and thousands of genes. The number of genes in a cell outnumbers the number of chromosomes.

In eukaryotic cells, all the chromosomes are found inside the nucleus of eukaryote.

The chromosomes and DNA can be examined so as to diagnose genetic disorders.

Answer:

only god knows the answer

The Gibbs free energy is given by the change in enthalpy, temperature, and change in entropy. The standard change in Gibbs free energy for oxidation of iron is –1484.6 kJ.

Gibbs free energy is the energy present in a thermodynamic system that is used by the reactant to form a product. It is given as,

Δ G° = Δ H° -T ΔS°

The oxidation reaction of iron is given as,

4Fe(s) + 3O₂(g) → 2Fe₂O₃(s)

Given,

ΔS° = –549.73 J∙K⁻¹

T = 298 K

Δ H° = –824.2 kJ∙mol⁻¹

Substituting values above the Gibbs free energy is calculated as:

Δ G° = Δ H° -T ΔS°

= –824.2 kJ∙mol⁻¹ -  298 K ( –549.73 J∙K⁻¹)

= -1484580.46 J

The units of joules are converted into kilojoules and the standard change in Gibbs free energy will be –1484.6 kJ.

Therefore, –1484.6 kJ is the Gibbs free energy.

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Taking into account the reaction stoichiometry, 0.18954 grams of Al(OH)₃ are formed from the reaction of 48.6 mL (0.0486 L) of 0.15 M KOH with excess Al₂(SO₄)₃.

In first place, the balanced reaction is:

Al₂(SO₄)₃ + 6 KOH → 2 Al(OH)₃ + 3 K₂SO₄

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

The molar mass of the compounds is:

Then, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:

Molarity is a measure of the concentration of a solute in a solution and indicates the number of moles of solute that are dissolved in a given volume:

Molarity= number of moles÷ volume

In firts place, you know that 48.6 mL (0.0486 L) of 0.15 M KOH react with excess Al₂(SO₄)₃.

Replacing in the definition, you can calculate the amount of moles of KOH that react:

0.15 M= number of moles÷ 0.0486 L

Solving:

0.15 M× 0.0486 L= number of moles

0.00729 moles= number of moles

Then, 0.00729 moles of KOH react with excess Al₂(SO₄)₃. So, following rule of three can be applied: if by reaction stoichiometry 6 moles of KOH form 156 grams of Al(OH)₃, 0.00729 moles of KOH form how much mass of Na₂SO₄?

\(mass of Al(OH)_{3} =\frac{0.00729 moles of KOHx156 grams of Al(OH)_{3}}{6 moles of KOH}\)

mass of Al(OH)₃= 0.18954 grams

Then, 0.18954 grams of Al(OH)₃ are formed from the reaction of 48.6 mL (0.0486 L) of 0.15 M KOH with excess Al₂(SO₄)₃.

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Answer:

i think its changing shape if I'm wrong I'm sorry

The maximum potential increase in the money supply resulting from the customer's $100,000 deposit into her bank account is $500,000.

This is because the reserve ratio is 20 percent, which means that the bank is required to hold 20 percent of the deposit in reserve and can lend out the remaining 80 percent. Therefore, the bank can lend out $80,000 to borrowers, who will then deposit that money into their own accounts, which in turn can be lent out again.

This cycle of lending and depositing continues until the total amount of money created through the initial deposit is five times the original amount, or $500,000. It's important to note that this is the maximum potential increase in the money supply, as banks may choose to hold more reserves or borrowers may choose to hold onto their loans as cash, which could limit the actual increase in the money supply.

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According to the law of conservation of momentum and energy, 28.4% of the kinetic energy from the neutron is transferred to the nucleus of the carbon during the elastic collision.

In elastic collisions, momentum and kinetic energy are both preserved. Imagine two trolleys that resemble one another moving in the same direction at the same pace. They clash, maintaining their speed as they bounce off one another. The fact that no energy has been wasted makes this collision fully elastic.

The rules of energy and momentum conservation are some of the most significant and practical ideas in physics. According to the principle of conservation of momentum, the overall momentum of a system of bodies remains constant no matter what external forces are present (it is conserved). The total energy is also a constant if all forces, internal or external, can be described by a potential; this is the law of conservation of energy.

Using the conservation of momentum and energy,

For two particles with mass m1 and m2, initial velocities i1 and i2 undergo a perfectly elastic head-on collision, you can find the after- collision velocities from [1]:

v1 = (i1 x (m1 - m2) + 2 x m2 x i2) / (m1 + m2)

v2 = (i2 x (m2 - m1) + 2 x m1 x i1) / (m1 + m2)

Let 1 denote the proton and 2 the nucleus.

Since the nucleus was initially at rest, i.e. i2=0, the velocity of the nucleus after the collision is:

v2 = 2 x m1x i1 / (m1 + m2) = 2 x i1 / (1 + (m2/m1))

Therefore, the kinetic energy of the nucleus after the collision:

E2' = (1/2) x m2 x v2² = 2 x m2 x i1² / (1 + (m2/m1))²

The fraction of the neutrons kinetic energy transferred to the nucleus:

f = E2 '/ E1

f = [2 x m2 x i1²/(1 + (m2/m1))² ] / [ (1/2) x m1 x i1²)]

f = 4 x (m2/m1) / (1 + (m2/m1))²

f = 4 x 12 / (1 + 12)²

f = 0.284

f = 28.4%

Result:

28.4% of the neutron’s kinetic energy is transferred to the nucleus of the carbon.

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Correct option is c. 0

Let's discuss it further below.

In the Lewis structure for formaldehyde (H2CO), where C is the central atom, the formal charge on C is:

Step 1: Determine the number of valence electrons for C. Carbon has 4 valence electrons.
Step 2: Calculate the number of electrons assigned to C in the Lewis structure. In formaldehyde, C is bonded to 2 H atoms (each with 1 bond) and 1 O atom (with a double bond). This gives C a total of 4 bonds, so it has 4 assigned electrons.
Step 3: Calculate the formal charge on C using the formula: Formal Charge = (Valence Electrons) - (Assigned Electrons). Thus, Formal Charge on C = (4) - (4) = 0.

So, the formal charge on C in the Lewis structure for formaldehyde is 0 (option c).

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Explanation:

n=,4.5 moles C2H6

the ratio 2:7

4.5:x

x=15.75 moles

To determine the ratio of ratios for the two compounds, we need to compare the percentages of sulfur and oxygen in each compound. The ratio of ratios for the two compounds is 1.25/8.93.

Compound 1:

Sulfur (S) = 50.0%

Oxygen (O) = 50.0%

Compound 2:

Sulfur (S) = 40.0%

Oxygen (O) = 5.600% Now, let's calculate the ratio of ratios: Ratio of sulfur (S): Compound 1: Compound 2 = 50.0% / 40.0% = 1.25

Ratio of oxygen (O): Compound 1: Compound 2 = 50.0% / 5.600% = 8.93. Therefore, the ratio of ratios for the two compounds is 1.25/8.93. Compounds are substances composed of two or more elements chemically bonded together. In a compound, the constituent elements are present in fixed proportions and are held together by chemical bonds.

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Answer:

0.199702876850182 that's it

Answer:

Map scale refers to the relationship (or ratio) between distance on a map and the corresponding distance on the ground.

Explanation:

For example, on a 1:100000 scale map, 1cm on the map equals 1km on the ground.

The formula mass of ammonium nitrate is 80.043 g/mol and number of moles, n = 0.0099 mol.

Molar Mass of ammonium nitrate

80.043 g/mol

n = m / M

n = 0.800g / 80.043 g/mol

n = 0.0099 mol

No. Moles (mol) = Molarity (M) x Volume (L)

=0.800 / 44.0124 g/mol

0.0182 mole - 0.0099 = 0.0083

= 0.0083

Ammonium nitrate is frequently used in the production of nitrous oxide, fertilizers, pyrotechnics, herbicides, and insecticides. It serves as a nitrogen oxide absorbent, a component of freezing mixtures, a rocket propellant oxidizer, and a yeast and antibiotic nutrient.

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Answer:

The indivisibility of an atom was proved wrong: an atom can be further subdivided into protons, neutrons and electrons...

hope this helps u

The Daltons atomic model gave the theory of chemical combination and the law of conservation of atoms. All matter is made of atoms is not disapproved. Thus, option A is correct.

Dalton’s atomic theory was given by John Dalton and involved several main points. According to the theory that matter has been composed of tiny atoms that are indestructible and indivisible.

It also stated about the mass, as atoms of various elements have different masses and the properties are shared by the atoms of the same element only. It gave rise to the law of conservation of mass, definite, and multiple proportions.

One of the laws is about matter being made of tiny particles called atoms. It has been not disproved by further investigation in any of the atomic models and theories.

Therefore, option A. the matter is made of atoms is not disproved.

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The unknown metal X is iron metal as it reacts with copper sulfate solution but does not react with magnesium chloride.

Some metals are very reactive while other metals are less reactive or unreactive. When a more reactive metal is added to the solution of a less reactive metal, then the more reactive displaces the less reactive metal from its solution is known as a displacement reaction.

The general form of a single displacement reaction can be represented as:

\(A + BC \longrightarrow B + AC\)

When iron is placed in copper sulfate (CuSO₄) solution then the blue color of the copper sulfate solution turns a red-brown coating of copper metal deposited on the iron.

\(CuSO_4 (aq)+ Fe (s)\longrightarrow FeSO_4 (aq) +Cu(s)\)

Iron lies above the electrochemical series and is more reactive than copper. So it reacts with copper sulfate but does not give any reaction with magnesium chloride.

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Answer:

a

Explanation: