Potassium dichromate is an oxidizing agent. The oxidation number of chromium in potassium dichromate is +6.

ai. name one compound which can be oxidised by potassium dichromate

aii. state the condition(s) under which the compound reacts with potassium
dichromate

aiii. what product is formed from the compound in the redox reaction?

Answer:

as the latitude increases, the intensity of the solar energy that strikes an area decreases,and climates become cooler

Explanation:

The higher the elevation the cooler the air therefore the climate becomes colder.

Answer for 1:

- Oxidation number of Mn in MnO4^-1= +7

- Oxidation number of O in MnO4^-1= -2

- Oxidation number of C in C2O4^-2= +3

- Oxidation number of O in C2O4^-2= -2

- Oxidation number of Mn in MnO2= +4

- Oxidation number of O in MnO2= -2

- Oxidation number of C in CO2= +4

- Balanced redox equation in basic solution:

Explanation for 1:

1st) To determine the oxidation numbers, it is necessary that the total sum of the charges is equal to that of the molecule or ion in the equation.

• Oxidation numbers in MnO4-,:

We know that the oxidation number for oxygen is -2, then we multiply it by the subscript 4 to find the whole charge of oxygen in this molecule.

Oxygen oxidation number: -2 x 4 = -8

Since the total charge of the molecule is -1, by difference, we will know that the oxidation number of Mn will be +7:

To confirm that the oxidation number that we determined exists for that element, we can check the Periodic Table of Elements.

We proceed in the same way with all molecules.

• Oxidation numbers in C2O4-2,:

• Oxidation numbers in MnO2,:

• Oxidation numbers in CO2,:

2nd) Now that we know the oxidation number os each atom in the reaction, then we can find the element that is oxidized and the element that is reduced.

We can see that Mn goes from +7 to +4, the Mn atom is reduced. And, the carbon atom goes from +3 to +4 so it oxidizes.

3rd) It is necessary to write the oxidation reaction and the reduction reaction separately and balancing all elements except oxygen and hydrogen:

Oxidation:

Reduction:

4th) Since the reaction occurs in a basic solution, we must add water (H2O) to balance the oxygen atoms and hydroxyl ion (OH-) to balance the hydrogen atoms. In this case, the reduction reaction is the only one that needs to be balanced with water and hydroxyl ion.

5th) It is necessary to balance the electrons in each half-reaction. So, we multiply each half-reaction by the number of electrons in the other half-reaction:

Oxidation:

Reduction:

6th) We need to cancel out everything that is repeated on opposite sides of the reactions, including the electrons.

Finally, we can write the balanced redox equation:

C. X and Y are the set of points lies within plane I

A plane is a two-dimensional, flat surface that extends indefinitely. A plane is a two-dimensional analogue that can incorporate three dimensions of space, a line, and a point.

In the planar equation, enter the coordinates of the provided points and record the values in P1 and P2. Verify the obtained values' signs: They are on the same side of the plane if P1 and P2 have the same parity. P1 and P2 are located on the opposing sides of the plane if their parities differ.

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Which set of points lies within plane I.

A) T and Y

B) X and V

C) X and Y

D) U and V

d.2.93m.CaCl2 is present in the solution with a 2.93m concentration.

The boiling point of a solution is directly related to its concentration. The boiling point elevation of a solution, ΔTb, is equal to the product of the van't Hoff factor (i) and the molality of the solution (m).The quantity of moles of solute per kilogramme of solvent is known as molality.

Therefore, we can solve for the molality of the solution using the following equation:

ΔTb

\(= i *m\\105.3\°C= i * m\\\)

\(m =\frac{ 105.3 \°C }{i}\)

Assuming an ideal van't Hoff factor for CaCl2 (i = 2), the molality of the solution is:

\(m =\frac{ 105.3 \°C }{ 2}\\m = 52.65 m = 52.65 mol/kg\)

The concentration of CaCl2 in the solution is then:

\(C = m * Kb\\C = 52.65 mol/kg * 0.512 \°C/m\\C = 2.93 mol/kg\)

Therefore,The concentration of CaCl2 in the solution is  2.93m.

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complete question:The boiling point at 1.00 atm of an aqueous solution of CaCl2 is 105.3 °C. What is the concentration of CaCl2 in the solution? Kb (H2O) = 0.512 °C/m. Assume an ideal van't Hoff factor for CaCl2.

a.3.45m

b.4.40m

c.8.79m

d.2.93m

The heat absorbed by the metal is 729.9 kJ.

We can calculate the heat absorbed by the copper using the formula below

⇒ Formula:

Q = cm(t₂-t₁)............... Equation 1

⇒ where:

From the question,

⇒Given:

⇒Substitute these values into equation 1

Hence the heat absorbed by the metal is 729.9 kJ

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Answer:

a

Explanation:

The ratio of the concentrations at equilibrium is as follows:

Chemical equilibrium is the point in a chemical reaction where both the forward and backward processes are occurring at the same rate.

The concentrations of the reactants and products are constant at equilibrium because the forward and reverse speeds are equal.

Considering the given statements based on the reaction equilibrium concentrations, the correct options are:

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Solar panels are mainly to obtain the sun's energy in the form of radiation to generate electrical energy. To capture the sun's energy, photovoltaic cells are used that work almost like a battery. The received sunlight separates the electrons so that they form a layer of positive charge and another negative charge in the solar cell. This potential difference generates an electrical current. These panels are in turn connected to a battery that stores the electricity generated and it is this charge that is used. These panels are in turn connected to a battery that stores the electricity generated and it is this charge that is used.

Hey there,

Given - Is UF6 a covalent compound or an ionic compound?

Answer- Covalent compound

Reason - Even though, still a subject of debate, theoretical results indicate that the U–F bond is partially covalent and could even possess some multiple bond characters, resulting from F → U π interaction cause.

~ Benjemin360

Answer:

              0.0342 moles

Explanation:

Moles and Mass are related as,

Moles = Mass / M.Mass

M.Mass of NaCl = 58.44 g/mol

Putting values,

Moles =  2.00 g / 58.44 g/mol

Moles = 0.0342 moles

There are 0.03425 moles in 2.00 g of NaCl. moles help in understanding the concept of molar mass.

A fundamental unit used in chemistry to measure the amounts of compounds is the mole, which is sometimes indicated by the symbol "mol." By making it possible for us to count atoms and molecules in a useful way, it creates a link between the atomic and macroscopic sizes. Simply expressed, one mole is equivalent to the quantity of a substance that includes exactly 12 grammes of carbon-12's exact number of atoms. In many facets of chemistry, including calculating the amount of substance in a reaction, balancing chemical equations, figuring out the concentration of solutions, and forecasting the mass of reactants or products, the mole concept is essential.

moles = mass / molar mass

moles = 2.00 g / 58.44 g/mol

moles = 0.03425 mol

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The given chemical equation, 2N₂ + 3H₂ <==>2NH3, is an example of a reversible reaction.option A.

The double arrows between the reactants and products indicate that the reaction can proceed in both directions, forming both products and reactants.The reversible reaction, also known as a chemical equilibrium reaction, refers to a chemical reaction that can occur in both forward and reverse directions. It occurs when reactants are converted into products, and the products are also converted back into the original reactants.A reversible reaction can be identified by the symbol “<==>” or “⇌” that appears between the reactants and products in the chemical equation. It denotes that the reaction is in a state of chemical equilibrium. When the reactants and products have achieved equilibrium, the rate of the forward and reverse reactions is equal, and there is no further net change in the amounts of the reactants and products.A combustion reaction is a type of exothermic reaction in which a substance reacts with an oxidizing agent to produce heat and light. A one-way reaction is a type of reaction that occurs in only one direction and cannot be reversed without significant changes to the reaction conditions, such as changing the temperature or pressure.A reversible reaction, unlike a one-way reaction, can occur in both directions and reach equilibrium when the forward and reverse reaction rates are equal.option A.

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Answer:

2HCI + Na2S ----> H2S + 2NaCl

Explanation:

For a balanced chemical equation, the number of moles of atoms on the reaction side must equal the number of moles of atoms on the product side, in accordance with the law of conservation of mass.

The correct answer is:

2HCI + Na2S ----> H2S + 2NaCl

Since it has equal number of moles of each atom on both sides of the equation: 2 atoms each of hydrogen, chlorine, and sodium on both sides of the equation as well as 1 atom of sulphur on both sides of the equation.

The correct categorization of the solutions is:a. KCl - Neutral

b. ZnCl2 - Acidic

c. Ba(C2H3O2)2 - Basic

d. NH4I - Acidic

e. NaNO3 - Neutral

To determine whether a 0.5M solution of each salt is acidic, basic, or neutral, we need to analyze the nature of the ions present in the solution.

a. KCl: When KCl is dissolved in water, it dissociates into K+ and Cl- ions. Both K+ and Cl- are spectator ions and do not contribute to the acidity or basicity of the solution. Therefore, the solution is neutral.

b. ZnCl2: When ZnCl2 is dissolved in water, it dissociates into Zn2+ and 2Cl- ions. The presence of Zn2+ ions in the solution can hydrolyze water molecules, resulting in the formation of H+ ions. Therefore, the solution is acidic.

c. Ba(C2H3O2)2: When Ba(C2H3O2)2 is dissolved in water, it dissociates into Ba2+ and 2C2H3O2- ions. The acetate ions (C2H3O2-) can hydrolyze water, leading to the formation of OH- ions. Therefore, the solution is basic.

d. NH4I: When NH4I is dissolved in water, it dissociates into NH4+ and I- ions. The presence of NH4+ ions in the solution can undergo a weak hydrolysis, resulting in the formation of H+ ions. Therefore, the solution is acidic.

e. NaNO3: When NaNO3 is dissolved in water, it dissociates into Na+ and NO3- ions. Both Na+ and NO3- ions are spectator ions and do not contribute to the acidity or basicity of the solution. Therefore, the solution is neutral.

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Answer:

H2O / H+

Explanation:

In alkene hydration, water, being a very weak acid, with insufficient proton concentration, does not have the capacity to initiate the electrophilic addition reaction. An acid must be added to the medium for the reaction to take place.

The mechanism proceeds with the formation of a carbocation after adding the proton to the double bond. Alkene hydration is Markovnikov, that is, the proton is added to the less substituted carbon of the alkene.

we can do soo by noticing any colour change, or by the formation of an insoluble precipitate or by the evolution of a gas.

Mescaline produces a wide range of psychoactive effects when ingested, including altered perception of reality, hallucinations, and euphoria. It is a powerful psychedelic drug that has been used for centuries by Native American tribes in spiritual ceremonies

Mescaline is a hallucinogenic alkaloid that is derived from the Peyote cactus. Mescaline is a complex organic molecule that can be synthesized in the laboratory from 3,4,5-trimethoxybenzyl bromide in two steps.The first step involves nucleophilic substitution using sodium cyanide, and the second step is a reduction using lithium aluminum hydride (LAH).Here's how mescaline can be synthesized from 3,4,5-trimethoxybenzyl bromide:Step 1: Nucleophilic substitution using sodium cyanideThe reaction of 3,4,5-trimethoxybenzyl bromide with sodium cyanide results in the formation of the nitrile derivative. NaCN serves as the nucleophile in this reaction, and it replaces the bromide ion.The mechanism for this reaction involves the following steps: A nucleophilic attack by the cyanide ion on the benzyl bromide. The carbon-bromine bond breaks, and the benzyl cation is formed. A second nucleophilic attack by the cyanide ion occurs on the benzyl cation, resulting in the formation of the nitrile derivative.Here's the reaction equation for this step:Step 2: Reduction using lithium aluminum hydrideThe next step is the reduction of the nitrile derivative using LAH. LAH serves as a strong reducing agent in this reaction and reduces the nitrile derivative to the amine. The mechanism for this reaction involves the following steps: A nucleophilic attack by LAH on the nitrile derivative. This results in the formation of an imine intermediate. The imine intermediate reacts with another LAH molecule, resulting in the formation of the amine.Here's the reaction equation for this step:Mescaline structure: Mescaline is a psychoactive compound that belongs to the phenethylamine class of alkaloids. The structure of mescaline is as follows: The molecule has three methoxy groups attached to the benzene ring, and it has an amine functional group. The molecule is a white crystalline powder that is soluble in water and alcohol.

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Answer:

52.9031 hope this helps:)

Explanation:

Molar mass of H2O = 18 g/mole

Molar mass of O2 = 32 g/mole

Molar mass of glucose = 180 g/mole

What is molar mass?

The molar mass is the substance; it helps to determine the mass of the sample substance to the atom of the sample or substance. The molar mass depends on the molecular formula and the isotopes of the atom. Molar mass is used for the inducement of electric charge. Molar mass is the measurement of the volume of the mass. The molar mass is expressed in the unit of dalton.

A mole is the atom's elementary particle, an ion. The mole of the substance is always related to the Avogadro number. The mole is always associated with the weight or mass of the element or substance. The standard unit of a mole is mol. The mole is a significant factor of the reactant and products to form an equation. A mole calculates the atom, ion, and substance weighs.

6CO2 + 6H2O ----> C6H12O6 + 6O2

Atomic mass C = 12 g/mole

atomic mass of O = 16 g/mole

atomic mass of H = 1 g/mole

Thus, molar mass of CO2 = 44 g/mole

Molar mass of H2O = 18 g/mole

Molar mass of O2 = 32 g/mole

Molar mass of glucose = 180 g/mole

Thus, moles of glucose in 0.075 g of it = mass/molar mass  = 0.075/180 = 0.00042

number of molecules of aspirin = moles*Avagadro's Number = 0.00042*6.022*1023 = 2.509*1020

239Pu + 4He2+ ------> 240Cm + 3n10

Therefore, Green plants take in water (h2o) and carbon dioxide (co2) and produce glucose (c6h12o6) and oxygen gas (o2), the moles are listed above.

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Answer:

The graph shown is not a function because points (-1,2) and (-1,0) have the same x value.

Explanation:

According to the research, the correct answer is Option 2. If the cell were only permeable to potassium ions there would be a slight change in membrane potential to a more negative value as potassium exits the cell.

It refers to the potential difference on either side of the membrane of a resting cell, that is, already repolarized where the channels are much more permeable to potassium than to sodium.

In this sense, it is determined by the ion concentration and membrane permeability where the inside of the cell has a more negative charge (potassium ions) relative to the outside (sodium ions).

Therefore, we can conclude that resting membrane potential causes the cell membrane inside to become negative because it has sodium ions towards the outside of the cell and potassium ions towards the inside, thus the correct answer is Option 2.

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Approximately 766.08 grams of oxygen are required to completely react with 240g of C₂H₆.

To determine the amount of oxygen required to completely react with 240g of C₂H₆ (ethane), we need to set up a balanced chemical equation for the combustion of ethane.

The balanced equation for the combustion of ethane is as follows:

C₂H₆ + O₂ → CO₂ + H₂O

From the balanced equation, we can see that the stoichiometric ratio between C₂H₆ and O₂ is 1:3. This means that for every one mole of C₂H₆, three moles of O₂ are required for complete combustion.

To calculate the amount of oxygen required, we need to convert the given mass of C₂H₆ to moles using its molar mass, and then use the stoichiometric ratio to determine the moles of O₂ required. Finally, we can convert the moles of O₂ back to grams using the molar mass of oxygen.

The molar mass of C₂H₆ is calculated as follows:

(2 x atomic mass of carbon) + (6 x atomic mass of hydrogen)

(2 x 12.01 g/mol) + (6 x 1.01 g/mol) = 30.07 g/mol

Now, we can proceed with the calculation:

Calculate the moles of C₂H₆:

moles of C₂H₆ = mass of C₂H₆ / molar mass of C₂H₆

moles of C₂H₆ = 240 g / 30.07 g/mol ≈ 7.98 mol

Determine the moles of O₂ using the stoichiometric ratio:

moles of O₂ = moles of C₂H₆ x (3 moles of O₂ / 1 mole of C₂H₆)

moles of O₂ = 7.98 mol x 3 ≈ 23.94 mol

Convert moles of O₂ to grams:

mass of O₂ = moles of O₂ x molar mass of O₂

mass of O₂ = 23.94 mol x 32.00 g/mol = 766.08 g

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Ar(g) deviates more from ideal behavior at extremely high pressures than Ne(g) does because A. The particle volume of Ar is greater than that of Ne.

When considering the ideal behavior of a gas, we make 2 assumptions:

Ar(g) deviates more from ideal behavior at extremely high pressures than Ne(g) does. Which of the following is one reason for this difference?

Ar(g) deviates more from ideal behavior at extremely high pressures than Ne(g) does because A. The particle volume of Ar is greater than that of Ne.

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Answer: a

. dissolving it in water

Explanation:

When the unknown material is dissolved in water, it could react with the water particles and end up producing another material. For instance an alkali metal in water could form metal oxides.

Heating the material until it melts will not change it into another material because it will still be the same material only now it will be in liquid form. The same logic applies if it is burnt in a flame.

We have to do this calculation, according to the rules of significant figures:

For additions or subtractions, we have to express the result with the number of significant figures of the number with the lowest one.

Then, we have to count each number's significant figures:

Then, the answer has to have 3 significant figures.

Then, the answer is the second: 7.95 g

The balanced redox reaction is \(Fe^{3+}+NO^{2-}+H_{2}O- > Fe^{2+}+H^{+}+NO^{3-}+H_{2}O\)

To balance the redox reaction: \(Fe^{3+}+NO^{2-}+H_{2}O- > Fe^{2+}+H^{+}+NO^{3-}\), we need to ensure that the number of atoms and charges are balanced on both sides of the equation.

First, let's balance the atoms. We have one Fe atom on both sides, so it's already balanced. Next, we have two oxygen atoms on the reactant side (from \(NO^{2-}\) and \(H_{2}O\)) and three on the product side (from \(NO^{3-}\)). To balance oxygen, we can add an \(H_{2}O\) molecule to the reactant side:

\(Fe^{3+}+NO^{2-}+H_{2}O- > Fe^{2+}+H^{+}+NO^{3-}+H_{2}O\)

Now, let's balance the charges. On the reactant side, the total charge is 3+ (from \(Fe^{3+}\) ) + 1- (from \(NO^{2-}\)) = 2+. On the product side, the total charge is 2+ (from \(Fe^{2+}\)) + 1+ (from \(H^{+}\)) + 1- (from \(NO^{3-}\)) = 2+. The charges are already balanced.

Therefore, the balanced redox reaction is:

\(Fe^{3+}+NO^{2-}+H_{2}O- > Fe^{2+}+H^{+}+NO^{3-}+H_{2}O\)

By adding an additional H2O molecule to the reactant side, we balanced both the atoms and charges in the equation.

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Answer

A real world example of Dalton's atomic theory is that people who ascend to high altitudes experience Dalton's law when they try to breathe. As they climb higher, oxygen's partial pressure decreases as total atmospheric pressure decreases in accordance with Dalton's law. Oxygen has a difficult time making it into the bloodstream when the gas's partial pressure decreases.

Explanation

Dalton's atomic theory was the first complete attempt to describe all matter in terms of atoms and their properties. The first part of Dalton's theory states that "all matter is made of atoms, which are indivisible." The second part of the theory says "all atoms of a given element are identical in mass and properties."

A real world example of Dalton's atomic theory is that people who ascend to high altitudes experience Dalton's law when they try to breathe. As they climb higher, oxygen's partial pressure decreases as total atmospheric pressure decreases in accordance with Dalton's law. Oxygen has a difficult time making it into the bloodstream when the gas's partial pressure decreases.

The waters of the North Atlantic are murky green because the color is caused by coral reefs in the area. That is option 4.

The excess nitrogen and phosphorus which is found in fertilizers can cause an overgrowth of algae in a short period of titme, when washed into water bodies. This is called algae blooms.

The effects of overgrowth of algae on aquatic bodies include the following:

Therefore, the murky green color is caused by coral reefs in the area.

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Answer:

The waters of the North Atlantic are murky green because the color is caused by coral reefs in the area. That is option 4.

The effects of overgrowth of algae

The excess nitrogen and phosphorus which is found in fertilizers can cause an overgrowth of algae in a short period of titme, when washed into water bodies. This is called algae blooms.

The effects of overgrowth of algae on aquatic bodies include the following:

reduce the ability of fish and other aquatic life to find food

It causes thick, green muck that impacts clear water, recreation, businesses and property values.

Therefore, the murky green color is caused by coral reefs in the area.

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Explanation: