at the end of glycolysis, in what molecule(s) can one not find the energy that was contained in the chemical bonds of glucose? select all that apply.

The given  statement "the salt bridge contains a solution of a strong electrolyte" is true because a salt bridge contains a strong electrolyte solution to maintain electrical neutrality in an electrochemical cell . For the second question, the  given statement "the reducing agent is the substance being oxidized in the reaction" is false because the reducing agent is the substance being oxidized, as it donates electrons to reduce another substance in the redox reaction .

The solution in the salt bridge typically consists of an electrolyte, which is a substance that dissociates into ions when dissolved in water. Strong electrolytes are substances that dissociate completely into ions in solution, such as sodium chloride (NaCl). This ensures that the salt bridge can effectively facilitate the flow of ions between the half-cells.

In a redox reaction, which involves the transfer of electrons between species, the reducing agent is the substance that donates electrons to another species, while the oxidizing agent is the substance that accepts electrons.

Therefore, the substance being oxidized is the oxidizing agent, not the reducing agent. For example, in the reaction 2Mg + \(O_{2}\) → 2MgO, magnesium is the reducing agent because it donates electrons to oxygen, which is the oxidizing agent that accepts electrons. Magnesium is therefore being oxidized, not reduced.

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Answer:

its the fourth one please mark as brainlest

Explanation:

Answer:

85g

Explanation:

To convert the moles of a substance to grams we need to know the molar mass of the substance. We, as first, must obtain the molar mass of (NH₄)₂S as follows:

There are 2 atoms of N, 8 of H and 1 of S:

N = 2*14g/mol = 28g/mol

H = 8*1g/mol = 8g/mol

S = 1*32g/mol = 32g/mol

Molar mass: 68g/mol

That means 1 mole of (NH₄)₂S has a mass of 68g.

1.25moles have a mass of:

1.25moles * (68g/mol) =

The equation that depicts a single replacement reaction would be: Zn(s) + 2HCl(aq)→ ZnCl2​​​(aq) ​​​​+ H2(g)

They are also known as single displacement reactions.

They are reactions in which one element takes the place of another in a compound. That is, one element replaces another in a compound.

Looking at all the reactions from A - D, one can see that the only reaction that exemplifies a single replacement reaction is D.

Here, Zn replaced H in HCl.

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The rock sample is approximately 1.992 billion years old.

Potassium-40 (K-40) has a half-life of 1.25 billion years, which means that after 1.25 billion years, half of the original K-40 atoms would have decayed into daughter atoms. In this particular rock sample, we are given that there are W Potassium-40 atoms for every 1000 daughter atoms.

To determine the age of the rock sample, we need to find the value of W. Since the half-life of K-40 is 1.25 billion years, after each half-life, the ratio of K-40 to daughter atoms will be halved. So, after one half-life, the ratio would be 1:2000 (W:1000).

To calculate the number of half-lives, we can use the equation:

(number of half-lives) = (log(W/1000)) / (log(1/2))

Since we are given W Potassium-40 atoms for every 1000 daughter atoms, we can substitute the ratio into the equation:

(number of half-lives) = (log(W/1000)) / (log(1/2))

(number of half-lives) = (log(W/1000)) / (-0.301)

Simplifying the equation, we find:

(number of half-lives) = -3.32 * log(W/1000)

Since we want to find the age of the rock sample, we multiply the number of half-lives by the half-life of K-40:

Age = (number of half-lives) * (half-life of K-40)

Age = -3.32 * log(W/1000) * 1.25 billion years

By substituting the given value of W and performing the calculations, we can determine the age of the rock sample to be approximately 1.992 billion years.

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The 2-Methyl-1-propene is the most stable compound This is true because it has more substituents (alkyl groups) attached to the double bond, which increases its stability due to the electron-donating effect of the alkyl groups. This makes sp2 hybridized carbon atoms more electronegative.

The 1-Butene is the least stable compound This is true because it has fewer substituents attached to the double bond compared to 2-Methyl-1-propene, making it less stable. The more carbon atoms attached to the double bond, the more stable the alkene This statement is true as well. Alkenes with more carbon atoms attached to the double bond have increased stability due to the electron-donating effect of the alkyl groups. A trans isomer is less stable than a cis isomer due to more steric hindrance: This statement is false. In general, trans isomers are more stable than cis isomers because they have fewer steric hindrances and lower energy conformations. sp2 hybridized carbon atoms are more electronegative than sp3 hybridized atoms: This statement is true. sp2 hybridized carbon atoms have a greater proportion of "s" character (33% s-character and 67% p-character) than sp3 hybridized carbon atoms (25% s-character and 75% p-character). This makes sp2 hybridized carbon atoms more electronegative.

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Show the bolded items and the boxes.

Answer:

In order to find the two statements, we must first define what the enthalpy of formation and the enthalpy of reaction mean.

Enthalpy of formation:

The change in enthalpy when one mole of substance is formed from its constituent elemetns at standard state.

Enthalpy of reaction:

The change in enthalpy when a reaction occurs and the reactants and products are in their standard states.

Now, we check the statements. The true ones are:

The Hrxn for C(s) + O₂(g) → CO₂(g) is the same as Hf for CO₂

This is true because the formation of carbon dioxide requires carbon and oxygen in their standard states.

The Hf for Br₂(l) is 0 kJ/mol by definition.

Because the bromine is present in its standard state, the enthalpy of formation is 0.

The Hrxn for the reaction 1.5H₂(g) + 0.5N₂(g) → NH₃(g) is the same as the Hf for NH₃(g)

The reactants and products are present in their standard state, and the reaction is the same as the one occurring during the formation of ammonia.

CO₂ is a non-polar molecule. The correct answer is CO₂.

CO₂, which is carbon dioxide, is a non-polar molecule because it has a symmetrical shape and its bond dipoles cancel each other out. In CO₂, the carbon atom is bonded to two oxygen atoms. The molecule has a linear shape, with the carbon atom in the center and the oxygen atoms on either side.

The bond between the carbon atom and each oxygen atom is polar because oxygen is more electronegative than carbon, creating a partial negative charge on the oxygen atoms and a partial positive charge on the carbon atom. However, because the molecule is linear, the bond dipoles are equal in magnitude and opposite in direction, effectively canceling each other out.

This results in a non-polar molecule overall, with no permanent bond dipole moment. To summarize, CO₂ is a non-polar molecule because its bond dipoles cancel each other out due to its symmetrical linear shape. Hence, CO₂ is the correct answer.

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Answer:

10 pts you say?

Explanation:

Answer:

malleable

Explanation:

The image represent in malleable property of metal.

The image possibly represents the photoelectric effect of a metal, which is when it emits electrons after being exposed to electromagnetic radiation. Metals are also characterized by physical properties such as conductivity, malleability, metallic luster, and metallic bonding.

Based on your question, the image possibly represents the photoelectric effect, a key property of metals. This phenomenon occurs when a metal surface exposed to electromagnetic waves of a certain frequency absorbs radiation and emits electrons. These emitted electrons are called photoelectrons. Metals can also exhibit free electron model behavior, where electrons freely roam within the metal structure.

Metals possess unique physical properties like conductivity, malleability, and metallic luster. Malleability refers to the metal's ability to deform without breaking, while conductivity refers to the metal's ability to transfer heat or electricity. A metallic luster gives metals their characteristic shiny appearance.

Finally, metals are also known for their metallic bonding—a unique force that holds together the atoms within a metallic solid. Metallic bonding gives rise to many useful and varied bulk properties of metals.

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Answer:

C

Explanation:

As air is pumped out of the jar, the water begins to boil because "the air pressure in the jar has been lowered until it is equal to the vapor pressure of the water."

The force is applied perpendicular to an object's surface per unit area across which that force is spread is known as pressure. The pressure gauge in relation to the higher pressures would be known as gauge pressure. Pressure is measured in a variety of ways.

Equilibrium or vapor pressure The pressure exerted by a vapor in thermodynamic equilibrium including its condensed phases at a particular temperature in a closed system is known as vapor pressure.

The temperature where the vapor pressure of liquid water matches the ambient pressure is known as the boiling point of water. Because we know that pressure,  temperature, as well as temperature, are directly related, water with a high boiling point will have a high boiling point, whereas water with a low boiling point will have a low boiling point.

When we maintain a vacuum (pressure lower than atmospheric pressure), water starts to boil at temperatures below 100 degrees Celsius.

Hence the correct answer will be option 3

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Answer: 59.41

Explanation:

The final temperature of the system has been 130\(\rm ^\circ C\).

Specific heat can be defined as the amount of heat required to raise the temperature of 1 g of substance by 1-degree celsius.

The amount of heat lost and the heat gained have been equal.

Heat = mass × specific heat × change in temperature

Thus,

mc\(\Delta\)T = mc\(\Delta\)T

50 g × (10 - x) = 120 × (x - 80)

500 - 50x = 120x - 9600

70x = 9100

x = 130

Thus, the final temperature of the system has been 130\(\rm ^\circ C\).

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Silicon dioxide (SiO2) solid and calcium bicarbonate (Ca(HCO3)2) aqueous are created when carbon dioxide (CO2) gas combines with calcium silicate (CaSiO3) solid and water (H2O) liquid.

The balanced chemical equation for the reaction is:

CO2(g) + CaSiO3(s) + H2O(l) → SiO2(s) + Ca(HCO3)2(aq)

This reaction occurs when calcium silicate (CaSiO3) and carbon dioxide (CO2) come into contact with water (H2O). Calcium bicarbonate (Ca(HCO3)2) in aqueous form and silicon dioxide (SiO2) in solid form are the byproducts of the reaction.

The phases denoted by the letters (g), (s), and (aq) in the equation are gas, solid, and aqueous, respectively.

A chemical reaction occurs when carbon dioxide gas (CO2), calcium silicate (CaSiO3), and water (H2O) are combined. Calcium silicate and carbon dioxide combine, resulting in the solid substance silicon dioxide (SiO2).

Calcium bicarbonate (Ca(HCO3)2) is produced in aqueous form from the remaining ingredients.

Phases are a significant source of data on the physical states of the reactants and products in the chemical equation. It specifies whether the reactants are in a liquid, gaseous, or solid phase at the time of the reaction.

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the two middle ones is the answer

To determine the amount of water and methane needed, we can set up a system of equations based on the desired composition of the mixture. you should use 36 gallons of water and 54 gallons of methane to obtain a mixture of 90 gallons with a methane concentration of 60%.

Let's assume x represents the number of gallons of water and y represents the number of gallons of methane. We have the following information: The total volume of the mixture is 90 gallons: x + y = 90. The mixture should be 60% methane: (y / (x + y)) * 100 = 60. Simplifying the second equation: y / (x + y) = 0.6. Now we can solve the system of equations: From equation 1, we can express x in terms of y: x = 90 - y. Substituting this into equation 2: y / ((90 - y) + y) = 0.6. Simplifying further: y / 90 = 0.6. Solving for y: y = 0.6 * 90. y = 54. Now we can find x using equation 1: x = 90 - y. x = 90 - 54. x = 36. Therefore, you should use 36 gallons of water and 54 gallons of methane to obtain a mixture of 90 gallons with a methane concentration of 60%.

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The standard cell notation of a galvanic cell made with aluminum and magnesium is option A. Al3+(aq) | Al(s) || Mg(s) | Mg2(aq).

The right side is the cathode and the left side is the anode. The cell is represented by the convention that the metal is written first, then the metal ions present in the electrolyte. And these two should be separated by a vertical line. Zinc becomes the cathode of the galvanic cell.

Galvanic cells consist of two different metal electrodes connected by a conductive solution electrolyte, which are also connected externally to complete an electrical circuit. Cell notation or cell representation in chemistry is a simple way of representing reactions in an electrochemical cell. The silver half-cell is reduced due to its high standard reduction potential. Tin half-cells are oxidized.

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Answer: C

Explaination:

The solubility of ionic compounds depends on the nature of the ions and their charges.

Ionic compounds containing Na+, K+, and NO3- ions are generally soluble in water because they have small ionic radii and weak ionic interactions. On the other hand, ionic compounds containing Ba2+, PO4-3, and CO3-2 ions tend to be less soluble in water because they have larger ionic radii and stronger ionic interactions.

Ba2+ and PO4-3 ions tend to form insoluble compounds, such as Ba3(PO4)2, while Ba2+ and CO3-2 ions can also form insoluble compounds, such as BaCO3. K+ and CO3-2 ions may also form an insoluble precipitate when combined with certain cations such as Ba2+. Overall, the solubility of ionic compounds can be influenced by factors such as temperature, pH, and the presence of other ions in the solution.

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2.70 grams of N2 reacts to produce 3.28 grams of NH3.

A chemical equation is a symbolic representation of a chemical reaction that shows the reactants and products involved and the ratios in which they combine. It is a concise way to describe a chemical reaction using chemical formulas and symbols. The reactants are written on the left side of the equation and the products on the right side, separated by an arrow pointing from left to right.

The general form of a chemical equation is:

Reactants → Products

In a chemical equation, the reactants are the substances that undergo a chemical change, and the products are the substances that are formed as a result of the chemical reaction. The coefficients before each reactant and product indicate the relative amounts of each substance involved in the reaction.

For example, the chemical equation for the reaction between hydrogen gas and oxygen gas to form water can be written as:

2H2 + O2 → 2H2O

This equation indicates that two molecules of hydrogen gas (H2) react with one molecule of oxygen gas (O2) to form two molecules of water (H2O).

The law of conservation of mass dictates that the total mass of the reactants must equal the total mass of the products in a chemical equation. Therefore, the number of atoms of each element must be the same on both sides of the equation. If necessary, coefficients can be adjusted to balance the equation.

Overall, chemical equations are a fundamental tool for understanding chemical reactions and predicting the outcomes of chemical reactions.

The balanced chemical equation for the reaction between nitrogen gas (N2) and hydrogen gas (H2) to form ammonia gas (NH3) is:

N2(g) + 3H2(g) → 2NH3(g)

This equation shows that 1 mole of N2 reacts with 3 moles of H2 to produce 2 moles of NH3.

To find the number of grams of NH3 produced when 2.70 grams of N2 reacts, we can use the following steps:

Calculate the number of moles of N2:

Molar mass of N2 = 28.02 g/mol

Number of moles of N2 = Mass of N2 / Molar mass of N2

= 2.70 g / 28.02 g/mol

= 0.0963 mol

Use the mole ratio from the balanced equation to find the number of moles of NH3 produced:

Number of moles of NH3 = Number of moles of N2 x (2 moles of NH3 / 1 mole of N2)

= 0.0963 mol x (2 mol NH3 / 1 mol N2)

= 0.1926 mol NH3

Calculate the mass of NH3 produced using the molar mass of NH3:

Molar mass of NH3 = 17.03 g/mol

Mass of NH3 produced = Number of moles of NH3 x Molar mass of NH3

= 0.1926 mol x 17.03 g/mol

= 3.28 g

Therefore, 2.70 grams of N2 reacts to produce 3.28 grams of NH3.

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B. Recession and inflation. Stagflation is an economic phenomenon characterized by a combination of stagnant economic growth (recession) and high inflation.

It is a situation where an economy experiences a period of low or negative GDP growth, high unemployment, and rising prices. This combination is considered unusual because in typical economic conditions, recessions are associated with low inflation or even deflation. Stagflation poses challenges for policymakers as traditional measures to stimulate economic growth, such as monetary easing, may worsen inflationary pressures.

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In the presence of water, ionic and hydrogen bonds can be disrupted.

Water is a polar molecule, meaning it has a partial positive charge on one end and a partial negative charge on the other end.

This polarity allows water to interact with other polar molecules, including ionic compounds and molecules containing hydrogen bonds.

Ionic compounds are held together by strong electrostatic forces between positively and negatively charged ions.

In the presence of water, the partial charges on the water molecule can attract and surround the ions, weakening the electrostatic forces and causing the ionic compound to dissociate into its component ions.This is why ionic compounds dissolve readily in water.

Hydrogen bonds are a type of intermolecular force that forms between a hydrogen atom bonded to an electronegative atom and another electronegative atom in a different molecule.

Water molecules can form hydrogen bonds with other polar molecules, and in the presence of water, these hydrogen bonds can be disrupted as water molecules compete for hydrogen bonding partners. This can affect the solubility and reactivity of molecules containing hydrogen bonds.

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Answer:

A balanced chemical equation must always include coefficients on every reactant and product.

Explanation:

A balanced chemical equation does not need to include coefficients on every reactant and product.

For example, below is a balanced chemical equation in which the reactants and the products have no coefficients whatsoever:

NaOH(aq) + HCl (aq) -----> NaCl (s) + H2O (l)

Of course, a properly written chemical equation must include the states of matter of all the substances in the reaction and the number of atoms of each element must balance both in the reactant and product sides of the equation. Generally, a balanced chemical equation must obey the law of conservation of matter which opines that matter can neither be created nor destroyed but can only be converted from one form to another.

Hence, that a balanced chemical equation must always include coefficients on every reactant and product is not true.

Answer:

Explanation:

The first attached diagram shows the proposed phenol that is being treated with KOH to form Oxonine (CₐHₐO).

Reaction of Arylhalide after treatment with KOH lead to the displacement of Bromine atom with the hydrogen from the hydroxyl (OH) substituent , then  forming HBr  , leaving the oxy (-O) atom  alone to form an Oxonine compound.

Therefore the propose structure for the product (Oxonine) CₐHₐO is shown in the second diagram attached below.

For each half-life, the total amount of the isotope is divided by 2.

Therefore, the amount of parent isotope that remains after:

1 half-life is ½= 0.5

2 half-lives= 2/4= 0.5

3 half-lives= 3/6= 0.5

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Electronegativity for boron is 2.0, and electronegativity for fluorine is 4.0. which type of bond forms between boron (B) and fluorine (F) in BF₃ is non polar covalent bond.

The  BF₃ is the covalent molecule. the electronegativity for boron is 2.0 and the electronegativity for the fluorine is 4.0 . the boron has 3 valence electrons and need 5 more to complete the octet and fluorine has 7 valence electrons . thus boron form three covalent bond with the atom of fluorine and try to complete the octet.

The  BF₃ is a triangular planar molecule. the dipole moment in the  BF₃ molecule is zero therefore  BF₃, boron trifluoride is a non polar covalent molecule.

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The weight percent of NaBr  in this solution is 150% and the mole fraction of NaBr in this solution will be 1.5.

Weight percent is a measure of the amount of solute (in this case, NaBr) in a solution relative to the total weight of the solution.

Weight percent (w/w) = (mass of solute / total mass of solution) x 100

In this case, the solution is 1.5 M NaBr, so we can calculate the mass of the solute:

mass of solute = molarity x molecular weight of solute

mass of solute = 1.5 M x 102 g/mol

mass of solute = 153 g

The total mass of the solution calculated as:

total mass = mass of solute / molarity

total mass = 153 g / 1.5 M

total mass = 102 g

Now we calculate the weight percent:

Weight percent (w/w) = (mass of solute / total mass of solution) x 100

Weight percent (w/w) = (153 g / 102 g) x 100

Weight percent (w/w) = 150%

The mole fraction of a solute is the ratio of the number of moles of the solute to the total number of moles in the solution.

The number of moles of NaBr can be calculated as:

number of moles of NaBr = mass of NaBr / molecular weight of NaBr

number of moles of NaBr = 153 g / 102 g/mol

number of moles of NaBr = 1.5 mol

And the total number of moles in the solution can be calculated as:

total number of moles = number of moles of NaBr / molarity

total number of moles = 1.5 mol / 1.5 M

total number of moles = 1.0 mol

Now we calculate the mole fraction:

Mole fraction = 1.5 mol / 1.0 mol

Mole fraction = 1.5

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Answer:

A thermochemical equation for the combustion of propane (C3H8)(C3H8) is written as follows:

C3H8(l)+5O2(g)→3CO2(g)+4H2O(g);ΔH∘rxnC3H8(l)+5O2(g)→3CO2(g)+4H2O(g);ΔHrxn∘ = -2202.0 kJ/mol

The value given for ΔH∘rxnΔHrxn∘ means that:

a. the reaction of one mole of propane absorbs 2202 kJ of energy from the surroundings.

b. the reaction is endothermic.

c. the enthalpy of formation of propane is 2202 kJ/mol.

d. the reaction of one mole of propane releases 2202 kJ of energy to the surroundings.

e. None of these.

Answer:

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

\(volume = \frac{mass}{Density} \)

From the question

mass of Iron = 1500 g

Density = 5.5 g/mL

Substitute the values into the above formula and solve

That's

\(volume = \frac{1500}{5.5} \\ = 272.727272...\)

We have the final answer as

Hope this helps you