Which is an example of a homogeneous mixture?
•sand
•clean air
•fresh-squeezed orange juice
•vegetable soup

The process of the reduction of half-reaction of a redox reaction occurs at the cathode in a galvanic cell.

A redox reaction's half reaction is its component that involves either oxidation or reduction. By taking into account how each substance involved in the redox reaction has changed in oxidation state, a half reaction is obtained. To balance redox reactions, half reactions are frequently employed. The hydrogen ions in the half reaction must be balanced with H+ ions in acidic oxidation-reduction reactions after the atoms and oxidation numbers have been balanced.

An electrochemical cell in which an electric current is produced from spontaneous oxidation-reduction reactions is called a galvanic cell, while a voltaic cell is named after the scientists Luigi Galvani and Alessandro Volta, respectively. Galvanic cells are two types of electrochemical devices that use chemical energy from spontaneous redox reactions to produce electricity.

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The question is incomplete, the complete question is ;

Which of the following is the correct rank of increasing electron affinities (from less exothermic to more exothermic)? Select the correct answer below: O Cs <K<Na <Li O Li< Na <K <Cs O Na <Li<K <Cs OK<Cs < Li< Na

Answer:

Cs< K<Na<Li

Explanation:

The electron affinity is defined as the energy released when a neutral gaseous atom accepts an electron to create a gaseous negative ion. This reaction is exothermic and leads to the evolution of heat.

When an electron is added to a metal, large energy is required since metals are usually electro positive. Electron affinity decreases down the group since electrons enter into higher energy levels further away from the nucleus. They experience lesser nuclear attraction.

This is clearly evidenced in the sharp decrease in the electron affinity of group one elements from lithium to caesium. The electron affinity of lithium is 60Kjmol-1 but decreases steadily down the group to a value of 46KJmol-1 for caesium. This explains the order chosen in the answer.

Answer:element symbol

Explanation:

An element symbol is the one or two letter sequence to at identifies an element, typically used through the periodic table

Symbols are abbreviations used in chemistry for chemical elements, functional groups and chemical compounds.

example:

H, Cl ,N , Ne etc.

Answer:

What? i think its an incomplete question

Explanation:

According to the Big Bang Theory, the Universe is expanding, hence option A is correct

Big Bang Theory is a theory about the origin and the nature of the universe and the earth we live in.

According to the theory, the universe started at an energized tiny point and exploded with a great force.

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Answer:

answer in picture

Explanation:

The balanced chemical equation will be Ca + MgCl2 → CaCl2 + Mg.

An equation that has the same quantity of atoms on both sides of the arrow would be said to represent a balanced chemical reaction.

The given equation is Ca + MgCl2 →

It is known that when Ca is reacted with magnesium chloride ( MgCl2) then it will form calcium chloride (CaCl2 ) and magnesium.

Ca + MgCl2 → CaCl2 + Mg.

It can be seen that, calcium has one atom in the reactant side and one atom in product side. On the other hand, chlorine has one atom in reactant side as well as product side.

Hence, the reaction will be balanced.

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The non-metal elements in Group 7 – known as the halogens – get less reactive as you go down the group

Answer & Explanation:

The reactivity of elements in Group VII, also known as Group 17, decreases with increasing atomic radius. This is because halogens have high electronegativities and a proclivity to gain electrons in noble gas configurations. Myths are traditional stories or beliefs that explain cultural or societal beliefs, customs, or natural phenomena. They can be passed down through generations and can be based on true or fictitious events. Mythology, on the other hand, is the collection of myths associated with a specific culture or religion. Mythology can be amplified through retelling, incorporation into religious practices; association with significant events or figures, and adaptation into other media forms such as literature, film, or art.

Answer:

it can be removed

1. by boiling

Ca(HCO3)2 > CaCO3 + H2O +CO2

2. by treating with calcium hydroxide

Answer:

B. Chlorine gas is yellow-green in color.

Answer:

Explanation:

The density of a substance can be found by using the formula

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

From the question

mass = 500 kg

volume = 0.026 m³

We have

\(density = \frac{500}{0.026} \\ = 19230.769230...\)

We have the final answer as

Hope this helps you

Answer: The magnesium ion Mg2+ is formed when the magnesium atom loses the two electrons from its outer shell to form a stable ion with a noble gas configuration.

Explanation:

Answer:

1s2,2s2,2p6,3s2,3p6,4s2

Explanation:

sorry but I didn't get the option sowrite by my self to be sure u can search or I may show u the way

It is the 4th scenario is the dependent event. There are 7 gold tokens and 4 silver tokens in a cup. The first student randomly draws a gold token and keeps it. A second student randomly draws a gold token from the cup.

The fouth scenario is a dependent event because the probability of the second student drawing a gold token is affected by the outcome of the first student's draw.

If the first student draws a gold token, then there are only 6 gold tokens left in the cup, the probability changes. but  if the first student does not draw a gold token, then there are 7 gold tokens left in the cup, the probability will remain the same

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Answer:

101

Explanation:

Provided that

\(S_1 = S_2 = same\ V_{max}\)

And,

\(S_1\ k_M = 2.0mM\\S_2\ k_M = 20mM\)

Now we expect the same

{S} (0.1mM)

This determines that \(S_1\) generates a  higher rate of product formation as compared to the \(S_2\)

So we can easily calculate the \(V_{max}\) for either of \(S_1\) or \(S_2\) as we know that Tube 1 is \(S_2\) and tube 2 is \(S_1\)

As we know that

\(V_0 = V_{max}\ {S} / (K_M + {S})\)

As the rates do not include any kind of units so we do not consider the units for \(V_{max}\)

Now the calculation is

\(0.5 = V_{max} (0.1\ mM) / (20\ mM + 0.1\ mM)\)

\(V_{max} = 0.5 (20.1\ mM) / 0.1\ mM\)

= 100.5

≈ 101

N5+ + 2e →N³

here Nitrogen gains electron so, its reduction half-reaction

20²- → 0₂

here oxygen loss electron so, its oxidation half-reaction

20² → 20₂ + 4e¯​

here oxygen loss electron so, its oxidation half-reaction

2N5+ + 4e¯ → 2N³

here nitrogen gains electron so, its reduction half-reaction

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27 grams of water are produced from the given amounts of hydrogen and oxygen.

To determine the amount of water produced from the reaction between hydrogen and oxygen, we need to compare the amounts of reactants (hydrogen and oxygen) to the stoichiometry of the balanced chemical equation.

The balanced equation is:

2H₂ + O₂ → 2H₂O

The molar mass of hydrogen (H₂) is 2 g/mol, and the molar mass of oxygen (O₂) is 32 g/mol.

Given:

Mass of hydrogen = 3 grams

Mass of oxygen = 24 grams

We can calculate the number of moles of each reactant by dividing their respective masses by their molar masses:

Number of moles of hydrogen = 3 grams / 2 g/mol = 1.5 moles

Number of moles of oxygen = 24 grams / 32 g/mol = 0.75 moles

According to the balanced equation, the ratio of hydrogen to water is 2:2, and the ratio of oxygen to water is 1:2. Therefore, the limiting reactant in this reaction is oxygen, as it is consumed in a smaller quantity compared to the stoichiometry of the reaction.

From the reaction, we can see that 1 mole of oxygen produces 2 moles of water. Thus, the number of moles of water produced is twice the number of moles of oxygen:

Number of moles of water = 2 * 0.75 moles = 1.5 moles

To determine the amount of water produced in grams, we multiply the number of moles by the molar mass of water (H₂O), which is approximately 18 g/mol:

Mass of water produced = 1.5 moles * 18 g/mol = 27 grams

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Taking into account the Henry's Law, 1.297 g carbon dioxide will dissolve at 790 mm Hg in 1.01 L water.

A change in pressure does not appreciably influence the solubility of solids or liquids or liquids in liquids; however, that of gases in solvents increases when the partial pressure of the gases increases. The solubility of a gas depends on pressure and temperature.

In this way, Henry's Law describes the effect of pressure on the solubility of gases. This law states that the solubility of a gas in contact with the surface of a liquid at a given temperature is directly proportional to the partial pressure of said gas on the liquid.

Mathematically, Henry's law is expressed as:

C=k×P

Where:

At 2 different partial pressure values, the Henry's law is expressed as:

\(\frac{C1}{C2} =\frac{P1}{P2}\)

In this case, you know:

Replacing in Henry's Law:

\(\frac{1.228\frac{g}{L} }{C2} =\frac{755 mmHg}{790mmHg}\)

Solving:

\(1.228\frac{g}{L} =\frac{755 mmHg}{790mmHg}xC2\)

C2= \(\frac{1.228\frac{g}{L} }{\frac{755 mmHg}{790mmHg}}\)

C2= 1.285 \(\frac{g}{L}\)

Then, the concentration of carbon dioxide at 790 mmHg is 1.285 g/L. But you have 1.01 L of water. So the amount of gas dissolved can be calculated as 1.01 L×1.285 g/L = 1.297 g

Finally, 1.297 g carbon dioxide will dissolve at 790 mm Hg in 1.01 L water.

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Explanation:

carbohydrate,fat,protein, vitamin, mineral, water

Answer:

There are six major nutrients: Carbohydrates (CHO), Lipids (fats), Proteins, Vitamins, Minerals, Water.

Answer: Oxygen

Explanation:

Producer organisms include plants and algae and refer to organisms that are able to produce their own food by synthesizing it from inorganic matter. This is what plants and algae are able to do through the process of photosynthesis.

During photosynthesis, these organisms produce food for themselves and in doing so produce oxygen as a by-product. This is what contributes mostly to the concentration of oxygen in the atmosphere.

The electric current is  0.025 A

Electric current refers back to the go with the flow of energy in an electronic circuit and to the amount of strength flowing through a circuit. it's far measured in amperes (A). the bigger the cost in amperes, the more energy is flowing within the circuit.

Ag+ + e¯ →Ag

1F deposits 107.87 g/mol (molecular mass) of silver

1F = 96500 C

Let, 107.87 g/mol needed = 96500 C

Number of coulombs required to deposit 0.3650 g of silver =(96500/107.87) 0.3650  

Q = 326.5 C

According to Faraday’s law, Q = I x t

I = 326.5 C / (216 x 60 s) = 0.025 A

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Answer:

The acid will react with the metal, causing hydrogen gas and salt to form from it.

The best way to measure the pH of a natural solution while out in a forest is to use a portable pH meter or pH test strips specifically designed for field use. These instruments provide accurate and reliable pH measurements and are convenient for outdoor applications.

1. Prepare the necessary equipment: Before heading out to the forest, gather the required tools. You will need a portable pH meter or pH test strips, as well as the necessary reagents or calibration solutions if using a pH meter.

2. Collect the sample: Locate the natural solution you want to measure the pH of, such as a stream, pond, or soil. Use a clean container to collect a representative sample of the solution.

3. Calibrate the pH meter (if applicable): If you are using a portable pH meter, it is essential to calibrate it before taking measurements. Follow the manufacturer's instructions to calibrate the meter using the provided calibration solutions.

4. Conduct the measurement: For pH meters, immerse the electrode into the collected sample. Allow some time for the reading to stabilize, and then record the pH value indicated on the meter's display.

5. Using pH test strips: If you are using pH test strips, dip the strip into the collected sample for the recommended amount of time. Remove the strip and compare the color change with the provided color chart. Determine the corresponding pH value from the chart.

6. Repeat for accuracy: To ensure reliability, repeat the measurement process at least once and compare the results. This step helps confirm the accuracy of your measurements.

7. Record and analyze the data: Note down the pH values obtained and any relevant observations. Analyze the data as needed for your research or monitoring purposes.

By following these steps and using the appropriate equipment, you can effectively measure the pH of a natural solution while in a forest setting.

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The start winding of a permanent split capacitor (PSC) motor will be: A) activated when the motor is running and up to speed.

An electric motor is what?

An electric motor is a device that is created and manufactured in electrical engineering to transform electrical energy into kinetic energy, particularly using electromagnetic induction.

What is permanent split capacitor (PSC) ?

A single-phase alternating current (AC) motor is referred to as a permanent split capacitor (PSC) motor if the capacitor is permanently linked as opposed to being attached only when the motor is starting.

This finally suggests that a permanent split capacitor (PSC) motor's start winding is activated when it is operating and moving at a high rate of speed.

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The word equations tells us that the combination of copper oxide and sulfuric acid produces copper sulfate and water

A word equation is a way to represent a chemical reaction using words instead of chemical formulas or symbols. It describes the reactants and products of the reaction in a clear and understandable manner as we see in the question that was shown as equation.

Note that the copper oxide and the sulfuric acids are the reactants that are combined and the copper sulfate and the water are the products.

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Answer:

4664.54  kcal of energy is produced on the complete combustion of 416 grams of cyclopentane

Explanation:

Combustion is the process by which hydrocarbons react with oxygen to heat to produce heat energy.

The heat energy produced when one mole of an hydrocarbon is completely burnt or combusted in air is called the heat of combustion

The balanced equation for the complete combustion of cyclopentane (C5H10) is given below:

             2C₅H₁₀ + 15O₂ → 10CO₂ + 10H₂O

                                                             ΔH combustion = 786.6 kcal/mol

What the above equation means is that each time one mole of cyclopentane is completely burnt, 786.6kcal of energy is released.

Hence we need to calculate the number of moles of cyclopentane in 416grams; therefore

No of moles cyclopentane = mass of cyclopentane / molar mass of cycopentane  

                                             = 416 g / 70.1 g/mol

                                             = 5.9343moles

                                             ≅ 5.93 moles of cyclopentane in 416grams

From the question, since the  cyclopentane is completely combusted, it implies that the energy released would be

    1 mole of cyclopentane     = 786.6 kcal of energy

   5.93 moles of cyclopentane would produce    

                                                = 5.93 moles x 786.6kcal/mol

                                                = 4664.54  kcal of energy

Answer:

Explanation:

Short answer: Yes.

The coefficients may not be conserved, but mass always has to be. Take this equation as an example

2 Mg3P2 ===>   6Mg + P4

There is a 2 on the left side and 6 and 1 on the right. I hope you mean that the coefficient 2 is not equal to 7.

But let's look a little closer. You have to look at the molecular structure of the left and right side.

2Mg3P2 has 6 Mgs and 4 Ps on the left side.

6Mg is on the right. They are free standing.

P4    has 1 molecule consisting of 4 Ps.

Everything balances.

This is a terrific question to be asking. You need to understand the internal balance numbers vs the molecular ones on the out side.

That sounds like a bit of gobbledygook and it takes a bit of study.

2 Mg3P2 means that Mg3P2 is written twice.

Mg3P2 ==> "3 Mg2+   +  2P3+   and there is another one written the same way.

Mg3P2 ==> "3 Mg2+   +  2P3+  

Answer:

Explanation:

Assumptions

Note

The concentrations would merely add. All things change if the assumptions I've made are not true.

Answer:

C) 2.99 cm^3

Explanation:

ρ=m/V

V=m/ρ=59.2/19.8=2.99 cm^3

Answer:

1) Oxidation-Reduction (Redox) Reaction

2) Combustion Reaction

3) Decomposition Reaction

4) Synthesis Reaction

5) Single Displacement (Substitution) Reaction

6) Double Displacement (Metathesis) Reaction

7) Acid-Base Neutralization Reaction

8) Precipitation Reaction

Here are the Answer:

1. Oxidation-Reduction (Redox) Reaction

2. Combustion Reaction

3. Decomposition Reaction

4. Synthesis Reaction

5. Single Displacement (Substitution) Reaction

6. Double Displacement (Metathesis) Reaction

7. Acid-Base Neutralization Reaction

8. Precipitation Reaction

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