Recall that you may have seen bubbles of gas forming during the redox reaction. Those bubbles are due to a side reaction between some of the aluminum wire and acid (H+ ions) formed by the hydrolysis of the copper ions. Write a balanced net ionic reaction that occurs between aluminum metal and acid ions. Which element is oxidized, which element is reduced?

25% weight-to-weight acetic acid solution has a molar fraction of 4.375 M.

What is molar fraction?

The mole fraction is one of many ways to indicate the concentration of the solution. A mole fraction is a unit of concentration. The ratio of solute to solvent in a solution is measured using a unit called the mole fraction, which is symbolised by the letter "X."

X is a molar fraction representation. The mole fraction is defined as: moles of solute/total moles of solvent if the solution contains only components A and B. As a result, the mole fraction of each component added together is always equal to one.

The fact that the acetic acid is specified as 25% should be noted.

1.05 kg/L or 1.05 g/ml of solution density is equal to d.

Given the density, the molar fraction of a 25% weight-averaged acetic acid solution will be:

M = 25 × 1.05 × 10/60

= 4.375 M

Therefore, 4.375 M is the molar fraction of a 25% weight-to-weight acetic acid solution.

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Answer:

151 g SO₂ × [1 mol SO₂/64.06 g SO₂] = 2.36 mol SO₂

Explanation:

95.6g I2 is produced by 2*150*95.6/254 g NaI = 112.91g of NaI.(sodium iodide)

What is sodium iodide?

A metal iodide salt with a Na (+) counterion is sodium iodide. It is an iodide salt and an inorganic sodium salt. A water-soluble ionic compound having a crystal lattice is sodium iodide. Although it can be used as a supplement for complete parenteral nutrition, sodium iodide is more frequently applied in veterinary medicine.

2*150 grams of Sodium Iodide NaI must be used to produce 254 g of Iodine I₂

For the formation of Iodine from NaI , the reaction is the follows:

2NaI(aq) + Cl₂ → I₂ + 2 NaCl

To calculate how many grams of NaI are needed to produce 95.6 g of Iodine, we use a conversion factor to go backward from grams of iodine to grams of sodium iodide.

Thus, 254g I2 is produced by 2*150 g NaI

95.6g I2 is produced by 2*150*95.6/254 g NaI = 112.91g of NaI.

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Molarity of isopropanol in the solution is found to be 0.0196M

The concentration of the solute in a solution is its molarity. It also goes by the name "molar concentration." The moles of solute per litre of solution is measured as molarity. The letter M serves as its symbol.

The amount of moles of solute in a kilogram of solvent is known as molality. The letter m stands for it.

Given:

Molecular mass of isopropanol, mm = 60.10g/mol

Molality, m = 10.01m

Density, d = 1.180g/ml

To find:

Molarity, M = ?

Formula:

M = (m x d) / 1 + (m x mm)

Calculations:

M = (10.01 x 1.180) / 1 + (10.01 x 60.10)

M = 11.8118 / 602.601

M = 0.0196M

Result:

The molarity of isopropanol in the aqueous solution is found to be 0.0196M.

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Density = 0.8104 g/ml

⇒ mass/volume = 0.8104 g in 1ml volume.

Number of moles = Mass (g) / Molar mass (g/mol)

⇒ No. of moles =0.8104/88.148 = 9.1936 x 10^-3 mole in 1 ml volume

So, in 2.66 ml of isopentyl alcohol,

No. of moles = 2.66 x 9.1936 x 10^-3 = 24.454976 x 10^-3 mole

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Answer:video camera

Explanation:

7g/mL

Density is a measure of mass per volume.

Density Formula

The density formula is  [tex]\displaystyle D=\frac{m}{V}[/tex] where m is the mass in grams (g) and V is the volume in milliliters (mL). The way I learned the formula was that the m over the V looks like a heart when written out.

We can plug the mass and volume we were given to solve for density.

[tex]\frac{14}{2}[/tex] equals 7. So, the density must be 7 grams per milliliter (g/mL).

Density Units

The units for density are important. You will not get the correct answer if you do not include your units. There are multiple ways to express density, but it is most common to have g/mL.

Additionally, density should always have the volume measurement in the denominator. This means that density will never be written in mL/g.

The mass percentage of Cl⁻ in the solution produced when 3.00g of CaCl₂ is dissolved in 100.0mL of water is 1.86 %.

The total mass of the solution which is produced when 3.00g of CaCl₂ is dissolved in 100.0mL of water is determined as follows:

mass of CaCl₂ = 3.0 g

mass of water = density * volume

mass of water = 1.00 g/mL * 100.0 mL

mass of water = 100.0 g

mass of solution = (100.0 + 3.0) g

total mass of solution = 103.0 g

molar mass of CaCl₂ = (40 + 35.5 * 2) g/mol

molar mass of CaCl₂ = 111 g/mol

mass percentage of Cl⁻ in CaCl₂ = 71/111

mass of Cl⁻ present in 3.0 g of CaCl₂ = 71/111 * 3 = 1.92 g

mass percentage of Cl⁻ in the solution = 1.92/103 * 100%

mass percentage of Cl⁻ in the solution = 1.86 %

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Answer:

False

Explanation:

Substances are of two types: Pure substances and mixtures. Pure substances include elements (made up of single kind of atoms), compounds (atoms of different element in fixed proportion). Substances are of three types: elements, compounds and mixtures.

Inside of complex 1, fmnh2 transfers electrons to an fe/s complex. when this reaction occurs, FMNH, gets oxidized. So, the correct option is (c).

Either complex I or II is where electrons can enter the electron transport chain. The NADH, which is created in three processes of the citric acid cycle, is where these electrons originate from. As an illustration, consider the reaction in step 8 where NAD+ is reduced to NADH and L-malate is oxidized to oxaloacetate. Two hydrogen (H+) ions and two electrons are taken away from the substrate in the oxidation half-reaction.

The NAD+ molecule takes both of those electrons as well as one of the H+ ions during the reduction half-reaction. The inner mitochondrial membrane, the intermembrane space, and the other H+ ion are all traversed by the other H+ ion from the matrix. Through the matrix, NADH diffuses before being bound by complex I of the electron transport chain.

Complex I of the electron transport chain binds NADH as it diffuses across the matrix. The coenzyme flavin mononucleotide (FMN) in the complex takes both of NADH's electrons. By transferring the electrons, FMN is reduced to FMNH2 (reduced form of flavin) and NADH is oxidized back to NAD+.

Several proteins in Complex I have iron-sulfur (FeS) centers. These proteins are now receiving the electrons that were used to convert FMN to FMNH2.Two Fe-S centers are required to accept the two electrons required to regenerate FMN mononucleotide since each Fe-S center can only transmit one electron.

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It is because the traditional definition of a strong acid is based on the simplicity of proton (hydrogen ion) donation in aqueous solution.

The chemical compound phosphorus pentoxide has the molecular formula P4O10 (with its common name derived from its empirical formula, P2O5). The anhydride of phosphoric acid is this white, crystalline solid. When P2O5 is dissolved in water, it produces H3PO4, or phosphoric acid (3H2O + P2O5 2H3PO4).

Phosphorus pentoxide has a molecular formula of P4O10, but its empirical formula is P2O5. But the name of the compound, not its molecular formula, was derived from its empirical formula. The official name for all of this substance is diphosphorus pentoxide.

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The molar fraction of 25% w/w acetic acid solution is 4.375 M.

The mole fraction, commonly known as the molar fraction (xi or I is a unit of measure for the amount of a constituent (represented in moles), ni, divided by the sum of all constituent amounts in the mixture (also stated in moles, ntot).

The Mole Fraction is the product of the molecular weight of one component divided by the molecular weight of the entire combination. When two components with reactive natures are combined, it is quite helpful.

The unit of molar fraction is  Moles/liter.

Density of solution = 1.05 kg/L

                                 = 1.05 g/ml

The molar fraction is

M = 25 × 1.05 × 10/60

    = 4.375 M

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Answer:

Oxygen has more protons than hydrogen and water's shared electrons are drawn to it.

Explanation:

Tertiary structure is achieved when a protein folds into a compact, three-dimensional shape stabilized by interactions between side-chain r groups of amino acids.

What is the structure of proteins?

A secondary amine (in proline), a molecule with the amino group (NH 2) attached to the alkyl side chain, and an amino acid with five carbon atoms (glutamic acid), are also found in proteins. Aspartic and glutamic acids both have two carboxyl groups (COOH), making them dicarboxylic acids.

When a protein folds into a small, three-dimensional shape that is stabilised by interactions between side-chain r groups of amino acids, this is known as tertiary structure.

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An acidic solution has a ph value of 0 - 6, a neutral solution has a ph value of 7, and a basic (alkaline) solution has a ph value of 8 - 14.

According to Arrhenius, an acid is a substance that releases hydroxonium ion (H3O+) as its only positive ion when dissolved in water. In other words, they are proton donors. They also turn litmus paper red, have a wet feeling and a sour taste.

A base is a substance that releases hydroxide ion (OH-) as its only negative ion when dissolved in water, according to Arrhenius. They are proton acceptors and turn litmus paper blue. They have a slippery feeling and a bitter taste.

To determine whether a solution is acidic or basic, ph indicators like litmus paper, phenolphthalein and methyl orange are used, but they do not give an exact ph value. To specifically know how acidic or basic a solution is, the ph scale is used. It comprises of a range of numbers from 0 - 14, with 0 being the most acidic and 14 being the most basic. Neutral substances like water have ph value of 7. Acidic solutions have a ph range from 0 - 6, while basic solutions have ph values from 8 - 14.

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Initial main byproducts of the reaction between concentrated hydro iodic acid and benzyl isopropyl ether are isopropyl alcohol and benzyliodide.

What are ethers?

Any organic compound in the family known as ethers has an oxygen atom bound to two alkyl or aryl groups. Ethers and alcohols share structural similarities, and water shares structural similarities with both ethers and alcohols. While both hydrogen atoms are replaced by alkyl or aryl groups in an ether, just one hydrogen atom of a water molecule is replaced by an alkyl group in an alcohol.

Thus, Initial main byproducts of the reaction between concentrated hydro iodic acid and benzyl isopropyl ether are isopropyl alcohol and benzyliodide.

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Answer: C)

Explanation:

cyclononane

Answer:

3.63 g/mL (3 s.f.)

Explanation:

Density is the amount of substance per unit volume, and can be calculated by dividing the mass by the volume.

Given: mass= 59.6 g, volume= 16.4 mL

Density of block

= 59.6 ÷16.4

= 3.63 g/mL (3 s.f.)

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Answer:

The density calculator will help you estimate the relationship between the weight and volume of an object.

Explanation:

The equilibrium solubility of Ca (So3)2 is

Ca (So3)2 ⇋⇋ Ca2 + 2(SO3)

The Ksp (Solubility product) expression looks like this:

Ksp = [Ca2+] [SO3-]2

Ca (So3)2 generates 1 mol of Ca2+ whereas 2 mol of SO3– per mol.

[Ca2+] = 1.18*10^-4 M

[I–] = (2) × 1.18*10^-4 M

So, [I–] = 2.36 × 10^-4M

On Replacing these values in the Ksp equation.

Ksp = (1.18*10^-4M) (2.36 × 10^-4M)2

So, Ksp = 2.7848 x 10^-8 M2

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Answer: created, destroyed, element, product

Explanation: The law of conservation of mass states that matter can neither be created nor destroyed but is transferred from one form to another. In other words, the mass of one element at the beginning of the reaction must be equal to the mass of the element at the end of the reaction.
So...the law of conservation of mass states that during a chemical reaction, mass/matter is not CREATED or DESTROYED and because of this law, there must be exactly the same number and kind of ELEMENTS on each side of a chemical equation.
To check if an equation is balanced or not, simply count the number of atoms of each element on the reactant side of the equation and check to see if there are the same number of atoms of each element on the PRODUCT side of the equation. If so, it is balanced.

Answer:

It is more active

Explanation:

This atom attracts all the elecrons of the atom forming energy levels in form of orbits

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An barium, group 2A family atom has an atomic number of 56

Barium is a chemical element with the symbol Ba and atomic number 56 it is fifth element in group two and is a soft, silvery alkaline earth metal because of its high chemical reactivity, barium is never found in the nature as a free element, element symbol are Ba and when  If it has a charge of 1+ then barium has 56 electron then 56-1=55 electron are present barium are present in group 2A in the periodic table and called alkaline earth metal

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The process for calculating the molarity of a solution:

1) Calculate the number of moles of solute by multiplying mass of solute and the inverse of molar mass.

2) Calculate the molarity of the solution by multiplying number of moles of solute and the inverse of solution volume.

n(NaNO₂) = m(NaNO₂) × 1/M(NaNO₂); multiplying mass of solute and the inverse of molar mass.

n(NaNO₂) = 4.8 g ÷ 69 g/mol

n(NaNO₂) = 0.0695 mol; the number of moles of solute

c(NaNO₂) = n(NaNO₂) × 1/V(NaNO₂);

c(NaNO₂) = 0.0695 mol ÷ 0.150 l

c(NaNO₂) = 0.463 mol/l; the molarity of the solution

Missing options:

1) Calculate the number of moles of solute by multiplying number moles of solute/mass of solute and molar mass/the inverse of molar mass.

2) Calculate the molarity of the solution by multiplying molarity of solute/number of moles of solute and solution volume/the inverse of solution volume.

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Answer:

k

Explanation:

k7

The kinetic energy is 0.5177 × 10⁻²¹ J more at 50°C compared to 25°C.

The average kinetic energy of a molecule is directly proportional to the absolute temperature of a gas.

KE = ( 3/2 ) ( R / Nₐ ) T

Where T is the temperature of the molecule, R is the gas constant, and Nₐ is Avogadro's number.

Now, R = 8.314 J/mol.K

Avogadro's number, Nₐ = 6.022 × 10²³ atoms/ mol

The average kinetic energy at 50° C is:

T = 50° C = 323 K

KE₁ = ( 3/2 ) × ( R / Nₐ ) × T₁

KE₁ = ( 3 × 8.314 × 323 ) / ( 2 × 6.022 × 10²³ )

KE₁ = 668.90 × 10⁻²³ J

KE₁ = 6.6890 × 10⁻²¹ J

The average kinetic energy at 25°C is:

KE₂ = ( 3/2 ) × ( R / Nₐ ) × T₂

KE₂ = ( 3 × 8.314 × 298 ) / ( 2 × 6.022 × 10²³ )

KE₂ = 617.13 × 10⁻²³ J

KE₂ = 6.1713 × 10⁻²¹ J

Now,

The average kinetic energy of the molecules at 50° C compared to 25° C is:

KE = KE₁ - KE₂

KE = 6.6890 × 10⁻²¹ - 6.1713 × 10⁻²¹

KE = 0.5177 × 10⁻²¹ J

Hence, the average kinetic energy is 0.5177 × 10⁻²¹ J more at 50° C compared to 25° C.

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Volume is the correct answer

Answer:

Oxygen and Carbon dioxide

The true statement about mixtures is that they do not have specific compositions (option B).

Mixture is a substance made up of two or more chemical components that are not chemically linked.

This further means that the constituents of a mixture maintain or keep their individual chemical identities because there is no breaking of bonds.

As opposed to mixtures, compounds are made up of constituents that are chemically bonded to one another, hence, possess a definite composition.

Examples of mixtures are as follows:

Therefore, the true statement about mixtures is that they do not have specific compositions.

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The relative molecular mass of sodium trioxonitrate, NaNO₃ is 85 g/mol.

The molecular mass of a substance is the sum of all atomic masses of all atoms in a molecule. It is measured in Dalton.

The compound is NaNO₃ and the atomic mass of all atoms are given below:

Atomic Mass of sodium (Na) = 23 g

Atomic Mass of nitrogen (N) = 14 g

Atomic Mass of oxygen (O) = 16 g

Now add the atomic masses of atoms of the molecules:

Molecular mass of = 23 +14 +16(3) = 85 g/mol.

Thus, the relative molecular mass of sodium trioxonitrate is 85 g/mol.

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240L of 90% solution is used to make solution.

Let, the quantity of 75% antifreeze solution be x and 90% antifreeze solution be y.

360 is the total quantity of the mixture

x + y = 360                                        (1)

Also the final solution is 85% solution

75 % of x + 90% of y = 85% of 360

0.75x + 0.90y = 0.85 × 360

0.75x + 0.90y = 306

75x + 90y = 30600                            (2)

by solving equation 1 and 2 we get

15y = 3600

   y = 240

Therefore, 240L of 90% solution is used to make solution.

Any material that lowers water's freezing point is an antifreeze, and it works to prevent ice from forming and shield systems from its negative consequences. Radiators in car cooling systems are protected by antifreezes, including ethylene glycol or propylene glycol, which are frequently added to water.

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Answer:

240L of 90% solution is used to make solution.

Let, the quantity of 75% antifreeze solution be x and

90% antifreeze solution be y.

360 is the total quantity of the mixture

x + y = 360

(1)

Also the final solution is 85% solution

75% of x + 90% of y = 85% of 360

0.75x + 0.90y = 0.85 × 360

0.75x + 0.90y=306

75x + 90y = 30600

(2)

by solving equation 1 and 2 we get

15y = 3600

y=240

Therefore, 240L of 90% solution is used to make

solution.

antifreeze, and it works to prevent ice from forming

Any material that lowers water's freezing point is an and shield systems from its negative consequences. Radiators in car cooling systems are protected by antifreezes, including ethylene glycol or propylene glycol, which are frequently added to water.