Relative formula mass- Calculate the relative formula mass of the foll
examples:
1) H₂O

The balanced chemical equation for the reaction is: Fe(s) + 2CuCl2(aq) → 2FeCl3(aq) + Cu(s)

The equation shows that one mole of solid iron reacts with two moles of aqueous copper(II) chloride to produce two moles of aqueous iron(III) chloride and one mole of solid copper.

To balance the equation, we need to ensure that the number of atoms of each element is the same on both sides of the equation. Here's how we balance the equation:

Fe(s) + 2CuCl2(aq) → 2FeCl3(aq) + Cu(s)

On the left-hand side, we have one iron atom (Fe) and two copper atoms (Cu). On the right-hand side, we have two iron atoms (Fe) and one copper atom (Cu). To balance the iron atoms, we add a coefficient of 2 in front of Fe(s) on the left-hand side:

2Fe(s) + 2CuCl2(aq) → 2FeCl3(aq) + Cu(s)

Now we have two iron atoms on both sides. However, we also have four chloride ions (Cl-) on the left-hand side and six chloride ions on the right-hand side. To balance the chloride ions, we add a coefficient of 3 in front of CuCl2(aq) on the left-hand side:

2Fe(s) + 3CuCl2(aq) → 2FeCl3(aq) + Cu(s)

Now we have two iron atoms, six chloride ions, two copper ions (Cu2+), and one copper atom on both sides. The equation is balanced!

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The energy, size, orientation, or spin of an electron within an atom are all described by quantum numbers. When giving these quantum numbers values, specific guidelines and limitations must be followed.

There are a collection of four quantum numbers in atoms: the main quantum number (n), its orbital rotational inertia fractional number (l), the spin quantum number (mm), and the electron quantum number (ms = +1/2).

This collection of complex numbers is permitted since the primary quantum number, n = 3, the azimuthal fractional number, l = 1, the spin quantum amount, ml = -2, and the modulus, ms = +1/2, are all permissible values.

n=4, l=3, ml=-1, and ms=-1/2

This set set quantum numbers is permitted because the main quantum number, n, has a valid value of 4, the azimuthal fractional number, l, a valid value of 3, the spin quantum number, ml, a valid value of 1, and the spin quantum number, ms, a valid value of -1/2.

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According to the question 88.4 grams of carbon dioxide must form.

Carbon dioxide is a colorless, odorless, non-toxic gas composed of two oxygen atoms and one carbon atom. It is a natural component of Earth's atmosphere and is produced through natural processes such as respiration and combustion. It is also produced artificially through processes such as burning fossil fuels and manufacturing. Carbon dioxide plays an important role in regulating the Earth's climate.

The reaction equation for the formation of carbon dioxide is:

C (graphite) + O2 → CO2

To find the amount of carbon dioxide that must form, we must multiply the number of moles of carbon (graphite) by the molar mass of carbon dioxide (44.01 g/mol).

25.0 g C × (1 mol C / 12.01 g C) × (44.01 g CO2 / 1 mol CO2) = 88.4 g CO2

Therefore, 88.4 grams of carbon dioxide must form.

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The height of the parallelogram-shaped pattern block is 25 mm.

The formula to find the area (A) of a parallelogram is A = base x height.

In the given parallelogram-shaped pattern block, we are given the area A = 525 mm² and the base b = 21 mm (assuming the base is the bottom side of the parallelogram).

Using the formula, we can rearrange it to solve for the height h:

A = base x height

=> h = A / base

Substituting the given values, we get:

h = 525 mm² / 21 mm

h = 25 mm

Therefore, the height of the parallelogram-shaped pattern block is 25 mm using A = base x height.

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The height of the parallelogram-shaped pattern block can be calculated using the formula:

Area of parallelogram = base x height

We know that the area of the parallelogram is A=525 mm² and the base is 21 mm. We can rearrange the formula and solve for the height:

height = A / base

height = 525 mm² / 21 mm

height ≈ 25 mm

Therefore, the height of the parallelogram-shaped pattern block is approximately 25 mm.

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Phosphate of sodium: Nitrate of zinc, Na3PO4, Zn(No3)2, bromate of barium: Perchlorate of iron (II) and ba(BrO3)2: Cobalt (II) hydrogen carbonate, Fe(ClO4)2: Co(HCO3)2.

Hydrogen acetate, also known as acetic acid, is the simplest of these, consisting of its salts, esters, and the polyatomic anion CH3CO2, or CH3COO.

Potassium dichromate is the chemical name of an inorganic chemical reagent known as K2Cr2O7. Dipotassium bichromate and potassium bichromate are other names for it. It is a bright reddish-orange crystalline ionic solid. It has no odor and is insoluble in alcohol and acetone, but it dissolves in water.

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The following chemical equation can represent the reaction:

Mg (s) + FeSO4 (aq) → MgSO4 (aq) + Fe (s)

In this reaction, the magnesium metal (Mg) replaces the iron (Fe) in the iron (II) sulfate (FeSO4) solution to form magnesium sulfate (MgSO4) and elemental iron (Fe). This is an example of a single displacement or substitution reaction, where one element replaces another element in a compound.

A catalyst is a substance that increases the rate of a chemical reaction by lowering the activation energy required for the reaction to occur. Catalysts provide an alternative pathway for the reaction that requires less energy to reach the desired products.

Examples of catalysts include enzymes, which are biological catalysts involved in many biochemical reactions in living organisms, and transition metal complexes, commonly used in industrial chemical reactions.

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The total pressure after the valve is opened and the gases mix is 6.875 kPa

What is ideal gas law?

The ideal gas law is a fundamental equation in physics and chemistry that relates the pressure, volume, temperature, and number of molecules of an ideal gas. The equation is expressed mathematically as:

PV = nRT

To find the total pressure after the valve is opened and the gases mix, we can use the ideal gas law, which states:

PV = nRT

where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature. Assuming the temperature is constant and the gases behave ideally, we can write:

(P₁V₁+ P₂V₂) / (V₁+ V₂) = Ptotal

where P1 and V1 are the pressure and volume of the oxygen, P2 and V2 are the pressure and volume of the helium, and Ptotal is the total pressure after the valve is opened.

Plugging in the values, we get:

(P₁V1+ P₂V₂) / (V₁+ V₂) = Ptotal

((10kpa)(3L) + (5kpa)(5L)) / (3L + 5L) = Ptotal

(30kpa + 25kpa) / 8L = Ptotal

55kpa / 8L = Ptotal

Therefore, the total pressure after the valve is opened and the gases mix is 6.875 kPa (rounded to three significant figures).

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Answer:

When salt is mixed with water, the salt dissolves because the covalent bonds of water are stronger than the ionic bonds in the salt molecules.

Explanation:

its like cotton candy in water

AWater can dissolve salt because the positive part of water molecules attracts the negative chloride ions and the negative part of water molecules attracts the positive sodium ions. The amount of a substance that can dissolve in a liquid (at a particular temperature) is called the solubility of the substance

Explanation:

The final temperature of the water and zinc mixture is 22.8◦C.

The principle of conservation of energy is a fundamental law of physics that states that the total energy of an isolated system remains constant over time. This means that energy cannot be created or destroyed; rather, it can only be transformed from one form to another. In other words, the total amount of energy in a system remains constant, even though it may change form or be transferred from one object to another.

This principle is a consequence of the laws of physics, and it applies to all natural processes. It is a fundamental principle of thermodynamics, which is the branch of physics that deals with the relationship between heat, energy, and work. According to this principle, energy can be converted from one form to another, such as from thermal energy to kinetic energy, but the total amount of energy in the system remains constant.

To solve this problem, we can use the principle of conservation of energy, which states that the total energy in a closed system remains constant. The energy gained by one object must be equal to the energy lost by the other object.

Let T be the final temperature of the water and zinc mixture. Then, the energy gained by the zinc is:

Q1 = mcΔT1

where m is the mass of the zinc, c is its specific heat capacity, and ΔT1 is the change in temperature of the zinc, given by:

ΔT1 = T - 66

The energy lost by the water is:

Q2 = mcΔT2

where m is the mass of the water, c is its specific heat capacity, and ΔT2 is the change in temperature of the water, given by:

ΔT2 = T - 17

According to the principle of conservation of energy, Q1 = Q2. Therefore, we have:

mcΔT1 = mcΔT2

Simplifying and solving for T, we get:

T = (mcΔT2 + 66cΔT1)/(mc)

Plugging in the given values, we get:

T = (39 kg x 4180 J/kg·◦C x (T - 17◦C) + 15 kg x 388 J/kg·◦C x (T - 66◦C))/(39 kg x 4180 J/kg·◦C + 15 kg x 388 J/kg·◦C)

Simplifying and solving for T, we get:

T = 22.8◦C

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Mass of potassium nitrate is needed to generate 215.0 L of gas, composed of 111.0 L of N₂ and 104.0 L of O₂ at 0.920 atm and 291 K, using these two reactions is 1186.75 g.

Potassium nitrate is a crystalline (sand-like), clear, white, or colorless powder or solid with a salty, pungent flavor. It is employed in the production of glass, rocket fuel, fireworks, fertilizer, explosives, and matches. Due to DOT's citation, potassium nitrate is included on the Hazardous Substance List.

The reactions are :

2KNO₃ --->  2KNO₂  +  O₂

4KNO₂  ---->  2K₂O  + 3O₂  +  2N₂

Therefore,

4KNO₃  ---->  2K₂O  +   5O₂  +  2N₂

using the formula:

PV = nRT

moles of N₂ = PV / RT

P = 0.920 atm

T =287 K

R = 0.082 Latm/mol/k

moles of N₂ = 4.279 mol

moles of O₂ = (0.92 × 134) / 0.082 × 287 = 123.28 / 23.534

                    = 5.24 mol

from the equation .

moles of potassium nitrate to produce nitrogen = 2 × 4.279

                                                                                = 8.55 mol

moles of nitrate tp produce oxygen = (4 / 5) × 4

                                                            = 3.2 mol

total moles of nitrate = 8.55 mol + 3.2 mol

                                   = 11.75 mol

mass of potassium nitrate = number of moles × molar mass

                                            = 11.75 × 101

                                             = 1186.75 g

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Hydroiodic acid - HI

Chloric acid - HClO3

Nitrous acid - HNO2

H2CO3 - Carbonic acid

HClO4 - Perchloric Acid

CH3COOH - Acetic acid

The name of a chemical compound is typically determined by its chemical formula and the rules of nomenclature, which provide a systematic way of naming compounds based on their composition and structure.

The name of an ionic compound is usually composed of the name of the cation followed by the name of the anion. The cation is typically named first and is usually the name of the metal element or the polyatomic ion.

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Answer: Both are Chemical changes.

Explanation: When you bake a cookie, you start out with a mixture of ingredients. These can include substances such as Baking Soda. When high heat is applied to Baking Soda, it starts to break down into Carbon Dioxide. This is an example of a chemical change because a new substance is formed. Proteins also break down at high heat in an oven resulting in a chemical change.

For the second change, a chemical reaction might help you visualize what's going on. 3 Ag2S(s) + 2 Al(s) ---> 6 Ag(s) + Al2S3(s) is the reaction that's occuring. We can clearly see that the products are different substances than the reactants indicating a chemical change.

To review, chemical changes are changes that result in the alteration of the structure of a substance which leads to the production of a new substance.

Hope this helps!

Answer:

3,272,000

Explanation:

Find the number of molecules in 3.72 mol of sulfur dioxide: There are 78.54 g of nitrogen dioxide in 3.72 mol of sulfur dioxide, so there are 3,272,000 molecules in 3.72 mol of sulfur dioxide.

An ionic equation for sodium hydroxide and calcium carbonate is Na⁺ + OH⁻ + Ca²⁺ + CO₃²⁻[tex]\rightarrow[/tex]Na⁺ +CO₃²⁻ + Ca²⁺ + OH⁻.

Ionic equation is defined as a chemical equation which represents electrolytes in aqueous solutions and are expressed as dissociated ions. Ions present in aqueous solutions are stabilized by ion dipole interactions with the water molecules which are present.

An ionic equation can be written for any electrolyte which dissociates and reacts with the polar solvent. In a balanced ionic equation , number and type of atoms on each sides of reaction arrow are same. Even the net charge on both sides of the arrow is same.

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The molar volume would be impacted too high. Therefore, option C is correct.

The molar volume (Vm) is the volume occupied by one mole of a chemical element or chemical compound at standard temperature and pressure (STP). You may figure it out by dividing the mass density (ρ) by the molar mass (M). It has the S.I. unit cubic meters per mole.

Thus, if a lab partner had allowed some of the water to siphon into the collection beaker before starting to heat the sample, the molar volume would be impacted too high. Therefore, option C is correct.

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Once equilibrium has been restored, we need to increase the amount of carbon monoxide to 0.300 mol by adding 0.343 mol of carbon dioxide at a fixed temperature and volume.

By measuring the rate of effusion through a pinhole, the composition of the equilibrium mixture (Cl2=2Cl), which is obtained at 1200 degrees Celsius, is ascertained. At 1.80 mm hg pressure, it is noted that the mixture emits 1.16 times more quickly than Krypton does at the same pressure.

The following is the expression for the reaction's equilibrium constant:

Kc = [CO2][H2] / [CO][H2O]

Do the equilibrium constant calculation:

Kc = [(0.250 mol/L)(0.250 mol/L)] / [(0.200 mol/L)(0.200 mol/L)]

= 1.5625 mol/L

The updated equilibrium concentrations of every species will be:

[CO2] = 0.250 + x mol/L

[H2] = 0.250 + x mol/L

[CO] = 0.300 mol/L

[H2O] = 0.200 + x mol/L

When we substitute these concentrations into the formula for the equilibrium constant, we obtain:

Kc = [(0.250 + x)(0.250 + x)] / [(0.300)(0.200 + x)]

Simplifying and solving for x, we get:

1.5625 = [(0.250 + x)(0.250 + x)] / [(0.300)(0.200 + x)]

4.6875(0.300 + x) = (0.250 + x)(0.250 + x)

1.40625 + 1.40625x = 0.0625 + 0.5x + x²

x² + 1.09375x - 1.34375 = 0

Using the quadratic formula, we get:

x = 0.343 mol

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Thus, the mass of  carbon dioxide created is 66.02 g, while the volume of water produced was 27.03 g.

Many health impacts from CO2 exposure may occur. These symptoms could include a coma, hypoxia, convulsions, sweating, disorientation, restlessness, a tingling and pins-and-needles sensation, difficulty breathing, fatigue, increased heart rate, and high blood pressure.

Through inhalation, CO2 is regarded as having low toxicity. CO2 behaves like a basic asphyxiant, which is what causes the majority of its negative health impacts. A gas known as a simple asphyxiant lowers or replaces the typical oxygen in breathing air. Headache and sleepiness are two signs of modest CO2 exposure.

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The perchloric acid solutions has a concentration of 4.66 mol/L. How so much solute has been absorbed in the solvent is indicated by the solution's level of concentration.

The percentage of a material, like salt, that is present in a specific volume of a liquid or tissue, like blood. Less water is present, and the material becomes more concentrated. Whenever a person doesn't consume sufficient amounts of water, for instance, the salt concentration in their urine may increase.

Ba(OH)2 moles equal volume times concentration, or 23.4 mL times 0.100 mol/L, or 0.00234 mol.

We can deduce from the equation that m2 m of HClO4 react including one mole pf Ba(OH)2. Hence, the amount of moles of Concentrated h2so4 in the 4.66 mL aliquot could be calculated as

0.00234 mol Ba(OH)2 divided by 1 equals moles of HClO4. (1 mol Ba(OH)2 / 2 mol HClO4) 0.0217 mol is equal to (1 L / 1000 mL) (4.66 mL / 1)

The concentration of a perchloric acid can finally be determined as follows:

HClO4 concentration is calculated as follows: moles per liter = 0.0217 mol / 4.66 mL = 4.66 mol/L

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The theoretical yield of AlCl₃ is 28.65g and percentage yield is 33.15%.

What is yield of a reaction?

In chemistry, yield, also referred to as reaction yield, is a measure of the quantity of moles of a product formed in relation to the reactant consumed, obtained in a chemical reaction, usually expressed as a percentage.

Theoretical yield of a reaction is calculated assuming that there is no error in the reaction procedure. Percentage yield can be calculated by the formula-

%Yield =  (Actual yield ÷ theoretical yield) ×100

Given,

Mass of Al(OH)₃ = 50.3g

According to reaction given,

78g Al(OH)₃ gives - 44.44g AlCl₃

1g Al(OH)₃ gives - 0.56g AlCl₃

Then, 50.3g Al(OH)₃ gives - 0.56×50.3 = 28.65g AlCl₃

%Yield = (9.5÷28.65) × 100

Therefore, the theoretical yield of AlCl₃ is 28.65g and percentage yield is 33.15%.

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The correct answers are given below, based on the given prompt:

Nickel as it is not an element in amoxicillin's molecular structure. Amoxicillin is a molecule composed of carbon, hydrogen, nitrogen, oxygen, and sulfur atoms.

The correct answer is Removing a green coating from copper coin with steel wool as it involves a chemical reaction where the green coating (copper oxide) is being reduced to copper metal by the iron in the steel wool.

The volume of water displaced by the copper sample is equal to the volume of the sample.

Using the density of copper (8.96 g/mL), the volume of the copper sample can be calculated as 183.4 g / 8.96 g/mL = 20.46 mL.

Thus, the new volume reading in the graduate cylinder is 35.4 mL + 20.46 mL = 55.86 mL or 56.0 mL (rounded to the nearest tenth).

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As per  the distance time graph object A is moving at variable speed but Object B is moving at constant speed.

The speed (commonly referred to as v) of an object is the magnitude of the change of its position over time or the magnitude of the change of its position per unit of time; it is thus a scalar quantity. The average speed of an object in an interval of time is the distance travelled by the object divided by the duration of the interval;the instantaneous speed is the limit of the average speed as the duration of the time interval approaches zero. Speed is not the same as velocity.

Speed has the dimensions of distance divided by time. The SI unit of speed is the metre per second (m/s), but the most common unit of speed in everyday usage is the kilometre per hour (km/h) or, miles per hour (mph).

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Answer:

Static Electricity

Explanation:

The shock that you feel when your body fills with extra electrons and you touch a good conductor is an example of static electricity, not an electrical current.

Static electricity is an imbalance of electric charges within or on the surface of a material. When two objects with different electric charges come into contact, such as your body and a good conductor, electrons can transfer from one object to another, resulting in a buildup of static electricity. When the electrical potential difference between the two objects becomes high enough, the electrons can jump across the gap in the form of a spark, creating a sudden discharge of static electricity, or shock.

In contrast, an electrical current is a continuous flow of electric charge through a conductor, such as a wire. Electrical currents are typically created by the movement of electrons or ions, and they are the basis for most forms of electrical energy and power.

So, the shock that you feel when your body fills with extra electrons and you touch a good conductor is an example of static electricity because it involves a buildup of electric charge that is released suddenly in the form of a spark or shock.

Explanation:

We need to use the first law of thermodynamics, which states that the change in internal energy (ΔU) of a system is equal to the heat (q) added to the system minus the work (w) done by the system:

ΔU = q - w

First, we need to convert the units of work from kcal to kJ:

375 kcal × 4.184 J/kcal = 1570.5 J = 1.5705 kJ

Now we can plug in the values we have:

ΔU = (5.00×10² kJ) - (1.5705 kJ)

ΔU = 498.4295 kJ

Therefore, the change in internal energy of the system is ΔU = 498.4295 kJ.

5. 4.00 moles of O2 can react to produce 4.00 moles of CO2.

What is the relationship between moles of O2 and moles of CO2?

According to the balanced chemical equation, the ratio of moles of O2 to moles of CO2 is 2:1, which means that 4 moles of O2 would react with 2 moles of CH4 to produce 2 moles of CO2. Therefore, statement 5 is true.

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If 25.82 mL of 0.0500 M NaOH solution are required to reach the equivalence point of an acid-base titration of 40.0 mL of 7-Up, the number of NaOH required is 0.00126 moles.

The point at which chemically identical amounts of reactants are put together is known as the equivalence point in a chemical reaction.

In other words, during titration, it is the point at which the titrant addition is sufficient to totally neutralize the analyte solution. The number of moles of a solution with an unknown concentration is equal to the number of moles of a titrant, or standard solution. Because it is a point where the amount of acid and base required to neutralize a solution is equal, it is often referred to as the stoichiometric point. It should be noted that the acid to base ratio need not be 1:1. The balanced acid-base chemical equation explains this acid-base ratio. For this, indicators might be used, for example, phenolphthalein or methyl orange.

The reaction between citric acid and NaOH is,

H₃C₆H₅O₇(aq) + 3NaOH(aq) →   Na₃C₆H₅O₇(aq) + 3H₂O(l)

According to the formula,

M = [tex]\frac{n}{V}[/tex]

where,

M is the molarity,

n is the number of moles and,

V is the volume(L)

For NaOH;

M = 0.0500 M

V = 25.82ml = 0.02582 l

n = M × V

n = 0.00126 moles

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Thus, in order to make 0.075 mol of water, 0.0375 moles or ammonium perchlorate are required.

Perchlorate can be purchased by any qualified specialists who plan to utilize the substance legally. Since this molecule and all of its derivatives are compounds requiring extremely professional expertise in handling, the procurement and handling of item must be subject to a number of laws.

An odorless, white, dust powder known as ammonium perchlorate. As an etching and etching agent, it is employed in analytical chemistry. Moreover, it is utilized in explosives and for animal fattening. According to DOT and NFPA citations, ammonium perchlorate is listed as a hazardous substance.

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The percent yield for this reaction of oxygen with Iron, would be 73. 2 %.

The percentage yield in a reaction can be found by the formula :

= Actual yield / Theoretical yield x 100 %

Theoretical yield of iron (III) oxide = 12.3 g

Actual yield of iron (III) oxide = 9.00 g

The percentage yield is therefore ;

= 9. 00 / 12. 3 x 100 %

= 0.732 x 100 %

= 73. 2 %

In conclusion, the percent yield is 73. 2 %.

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The rate of diffusion of two gases is 7 cm³/sec and 35 cm³/sec respectively.

The rate of diffusion is the amount of gas passing through the an area in unit time.

The diffusion rate depends on several factors:

Given,

Volume of first gas = 280 cm³

Time of first gas = 40 seconds

Volume of second gas = 350 cm³

Rime of second gas = 10 seconds

Rate of diffusion = volume of gas diffused ÷ time

Rate for first gas = 280 ÷ 40

                            = 7 cm³/sec

Rate of second gas = 350 ÷ 10

                                 =  35 cm³/sec

Therefore, The rate of diffusion of two gases is 7 cm³/sec and 35 cm³/sec respectively.

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Mechanical energy is the sum of the kinetic energy and the potential energy of an object, option C.

Mechanical energy is applied in systems where there is movement or force involved, such as machines, vehicles, and structures. It is the sum of an object's kinetic energy and potential energy due to its position or state of deformation.

Some examples of mechanical energy in use include a car engine converting fuel into mechanical energy to power the vehicle, a wind turbine converting wind energy into mechanical energy to generate electricity, and a roller coaster converting potential energy at the top of a hill into kinetic energy as it descends.

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