PLEASE HELP
Activation energy is
a. the energy required to form the activation complex.
b. the net energy difference between the products and reactants.
c. the heat of reaction.
d. free energy.

The law of diminishing marginal rate of substitution indicates that the rate at which one input can be substituted for another decreases as the quantity of one input increases, leading to isoquants being bent toward the origin.

In other words, as the quantity of one good increases, the individual is willing to sacrifice fewer units of the other good to obtain an additional unit of the first good. This reflects a diminishing rate of substitution between the two goods.

The reason why the law of diminishing marginal rate of substitution suggests that isoquants must be bent toward the origin is rooted in the concept of diminishing marginal utility. As more units of a particular input (e.g., labor or capital) are added while holding other inputs constant, the additional output gained from each additional unit of the input will decrease. This diminishing marginal productivity leads to a decreasing MRS.

When isoquants (which represent different combinations of inputs that produce the same level of output) are bent toward the origin, it reflects the fact that as more of one input is used, the amount of the other input that needs to be substituted decreases. This bending signifies the diminishing MRS and captures the idea that a larger quantity of one input can be substituted for a smaller quantity of the other input to maintain the same level of output.

Overall, the law of diminishing marginal rate of substitution indicates that the rate at which one input can be substituted for another decreases as the quantity of one input increases, leading to isoquants being bent toward the origin.

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When a diprotic acid is titrated with a strong base, and the Ka1 and Ka2 are significantly different, then the pH vs. volume plot of the titration will have two distinct equivalence points. Thus, the correct answer is option C. For diprotic acids, the two acidic hydrogens (H+) are not lost at the same pH value.

The titration of a diprotic acid with a strong base yields two distinct pH curves as shown in the figure. The plot is also called a two-stage titration graph. The plot is divided into two stages because of the two dissociation steps of the diprotic acid. Titration curve for a diprotic acid. The curve has two equivalence points.

The first equivalence point corresponds to the reaction of the first hydrogen ion (H+) from the diprotic acid with the strong base. The pH at the first equivalence point is generally less than 7 because the salt of the weak acid is an acidic solution.

The second equivalence point occurs when all of the hydrogens have been neutralized. The pH at the second equivalence point is greater than 7 because the salt of the weak acid is a basic solution.

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The correct answer attached in file, Thank you for joining brainly community.

A potassium atom's ground state electron configuration is 1s2, 2s2, 2p6, 3s2, 3p6, 4s1.

An atom's electron configuration is a picture of how electrons are arranged in relation to orbital shells and subshells. Consequently, this is potassium's electron configuration.

Making Electron Configurations in Writing. Write the energy level (the period) first, then the subshell that needs to be filled, and finally the superscript, which indicates how many electrons are in that subshell. The atomic number, Z, is the sum of all the electrons.

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The following chemical reaction occurs when hydrochloric acid and calcium carbonate come into contact: CaCO3 + 2HCl → CaCl + CO2 + H2O, providing acid neutralization as well as byproduct production. Carbon dioxide is the new ionic component as a result.

Whenever the levels of calcium consumed through food alone is insufficient, calcium carbonate is used as a dietary supplement. The body needs calcium for strong bones, muscles, a healthy neurological system, and a healthy heart. In addition to being an antacid, calcium carbonate is used to treat stomach discomfort, heartburn, and acid indigestion.

The chemical compound calcium carbonate, with the formula CaCO3, is created when carbon, oxygen, & calcium come together. It is a common mineral found in rocks all over the world, most notably as limestone, and it is the main component of marine animal shells, snail shells, coal balls, pearls, or eggshells.

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Answer:

-1464 kJ/mol

Explanation:

The balanced equation for the reaction is given as;

C2H4(g)+3O2(g)→2CO2(g)+2H2O(l) ΔH∘1=?

The enthalpy of the reaction is given by the equation;

Enthalpy of reaction = Enthalpy of products - Enthalpy of reactants

Products:

2CO2(g)+2H2O(l)

Enthalpy of Products = 2 (−394) + 2(−286)

Enthalpy of Products = -1360 kJ/mol

Reactants:

C2H4(g)+3O2(g)

Enthalpy of Reactants = 2 (52) + 3(0)

Enthalpy of Reactants = 104 kJ/mol

Enthalpy of Reaction =  -1360 - 104 = -1464 kJ/mol

For an O-H bond has a length of 9.6 x 10⁻¹¹ nm, the approximate size of a water molecule, H₂O is D) 3 x 10⁻¹⁰ nm.

The approximate size of a water molecule, H₂O, can be estimated by adding the length of two O-H bonds and the diameter of an oxygen atom.

2(O-H bond length) + oxygen atom diameter = 2(9.6 x 10⁻¹¹ nm) + 1.52 x 10⁻¹⁰ nm ≈ 2.88 x 10⁻¹⁰ nm

Therefore, the approximate size of a water molecule, H₂O, is D) 3 x 10⁻¹⁰ nm.

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The binding of the amino acid in aminoacyl-tRNA involves the formation of an ester bond.  Option b

Aminoacyl-tRNA is a complex molecule that plays a crucial role in protein synthesis. It consists of a tRNA molecule covalently linked to an amino acid. The amino acid is attached to the 3' end of the tRNA molecule through an ester bond.

An ester bond is formed between the carboxyl group (-COOH) of the amino acid and the hydroxyl group (-OH) of the ribose sugar at the 3' end of the tRNA molecule. This ester bond is also referred to as an ester linkage. The formation of the ester bond is catalyzed by the enzyme aminoacyl-tRNA synthetase.

The ester bond in aminoacyl-tRNA is essential for protein synthesis. During translation, the aminoacyl-tRNA molecule carries the specific amino acid to the ribosome, where it is incorporated into the growing polypeptide chain. The ester bond is later hydrolyzed, releasing the amino acid for further use in protein synthesis.

In summary, the binding of the amino acid in aminoacyl-tRNA involves the formation of an ester bond between the carboxyl group of the amino acid and the hydroxyl group of the ribose sugar in the tRNA molecule.

Option b

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NH3

Why are you using brainly for this simple question? Search history being checked?

Answer:

\(NH_{3}\)

Explanation:

Structure and Formula of Ammonia

Its chemical formula is NH3 and the molar mass is 17.03 g/mol. It is a compound of hydrogen and nitrogen.

Answer:

ight i'll answer both rq

Explanation:

a. Rub the magnet along the nail or knitting needle. Now try picking up the paper clip or

tack. Could your nail pick it up? How many can it pick up at once?

after rubbing the magnet with the nail, it could pick up 7 small paper clips.

b. Now try to make your magnet stronger by rubbing the magnet along the nail or knitting

needle for a longer time. Rub only in one direction, not back and forth. This will increase

the number of atoms that line up with the magnet. Try to pick up paper clips or

thumbtacks. How many can it pick up now?

after rubbing it a second time but for a longer period, it could pick up around 10, almost lifting the 11th.

Answer:

A. After rubbing the magnet with the nail, it could pick up 7 small paper clips.

B. After rubbing it a second time but for a longer period, it could pick up around 10 small paper clips, almost lifting the 11th one.

The mass of gold is 193g.

Density is defined as the mass of a material substance per unit volume. The equation for density is d = M/V, where d stands for density, M for mass, and V for volume. It is generally measured in grams per cubic centimeter. Density provides an easy way to calculate a body's mass from its volume or vice versa; the mass is equal to the volume multiplied by the density (M = Vd), whereas the volume is equal to the mass divided by the density (V = M/d).

Now, in the given question,

Density of gold = 19.3 g/cm³

Volume of gold = 10 cm³

Since,  Density = Mass/Volume

Therefore, Mass of gold = Density of gold × Volume of gold

                                        = 19.3g/cm³ × 10 cm³

                                       = 193g.

Hence, the mass of gold is 193g.

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From the fact that the bond order would reduce from one to 0.5, it shows that the ionized specie is weaker than the hydrogen molecule that has not yet been ionized.

The term bond strength has to do with how strong the bond that holds two atoms together is. We know that the stronger the bond, the more difficult it would be to break the bond by whatever means.

In this case, we are told that when we ionize the hydrogen molecule, the strength of the bond is changed. This implies that the bond would become weaker as the bond order of the specie would reduce from one to 0.5.

Also, the lesser the bond order, the weaker the molecule is. It then follows that the hydrogen molecule that has not been ionized with a bond order of one has a stronger bond than the ionized specie that has a bond order of 0.5.

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The safety relief system is an important component of a process plant. A good safety relief system ensures that the equipment is protected against overpressure situations. Chlorination reactors with organic reactants require the utmost care in the design of the relief systems.

Considerations involved in designing safety relief system and relief scenario for a chlorination reactor with organic reactants are discussed below:

1. Hazard Identification: Identify the hazards associated with the reaction chemistry of the chlorination reactor with organic reactants. Also, assess the potential failure scenarios that may lead to an overpressure event.

2. Relief Scenarios: Consider the design of relief scenarios that will be used to protect the reactor and the surrounding equipment. The scenarios should be designed to address all potential overpressure events.

3. Relief Devices: Choose the right type of relief device(s) based on the process parameters and the required relief scenario. The relief devices must be designed to relieve the pressure within the reactor in a safe manner.

4. Relief Sizing: Calculate the size of the relief devices based on the maximum potential relief flow rate. The sizing should be done in such a way that the device can handle the maximum expected pressure with a reasonable margin of safety.

5. Relief Piping: Design the relief piping such that it has the capacity to handle the maximum expected relief flow rate. The piping should be arranged in such a way that it can relieve the pressure in a safe manner.

6. Relief Header and Disposal: Design the relief header and the disposal system in such a way that it can safely handle the maximum expected relief flow rate. The header and the disposal system should be arranged in such a way that they do not pose a hazard to the surrounding equipment and personnel.

7. Testing and Maintenance: Test the relief system regularly to ensure that it functions as expected. Also, maintain the system in accordance with the manufacturer's recommendations to ensure that it remains in good working order.

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The full antacid tablet would neutralize 1.41 L of stomach acid.

let's calculate the concentration of the simulated stomach acid. We added 4.0460 g of antacid to 200 ml of stomach acid, so the concentration is:

C1 = (4.0460 g / 200 ml) * (1 mol / 102.09 g) = 0.0197 M

1 mol of HCl reacts with 1 mol of NaOH

So the number of moles of HCl neutralized by the NaOH solution is:

n = C2 * V2 = (0.1000 mol/L) * (27.4 mL / 1000 mL) = 0.00274 mol

n_antacid = 5.6720 g / 102.09 g/mol = 0.0555 mol

so the number of moles of HCl neutralized by the antacid tablet is:

n_HCl = 0.5 * n_antacid = 0.0278 mol

V_HCl = n_HCl / C1 = 0.0278 mol / 0.0197 mol/L = 1.41 L

Concentration refers to the amount of a solute dissolved in a given amount of solvent or solution. It is usually expressed in units of molarity (moles per liter) or weight per volume (grams per liter). There are various methods for measuring concentration, including titration, spectrophotometry, and gravimetry. These methods allow chemists to accurately determine the amount of solute in a solution and adjust the concentration as needed.

Concentration plays a crucial role in many chemical reactions and processes. It can affect the rate of a reaction, the yield of a product, and the properties of a solution. For example, a higher concentration of reactants can increase the rate of a reaction, while a higher concentration of a solute can increase the boiling or melting point of a solution.

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A molecule that contains multiple hydroxyl groups will be increasingly polar due to the cumulative effect of each hydroxyl group's polarity. This increased polarity affects the physical and chemical properties of the molecule and can lead to stronger intermolecular forces.

Hydroxyl groups (-OH) are highly polar due to the electronegativity difference between oxygen and hydrogen atoms. When multiple hydroxyl groups are present in a molecule, it becomes increasingly polar. This is because each hydroxyl group contributes to the overall polarity of the molecule, leading to stronger intermolecular forces such as hydrogen bonding.

The polarity of a molecule is important because it affects the physical and chemical properties of the substance. For example, highly polar molecules have higher boiling and melting points compared to nonpolar molecules. They are also more soluble in polar solvents and can interact with other polar molecules through intermolecular forces such as dipole-dipole interactions.

One common example of a molecule containing multiple hydroxyl groups is ethanol (CH3CH2OH). Ethanol is a polar molecule due to the presence of the hydroxyl group, and the presence of multiple hydroxyl groups in ethanol enhances its polarity. This is why ethanol is highly soluble in water and other polar solvents.

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Answer:(GMO)

Explanation: genetically modified organism (GMO)

Answer:

There are two direct factors that affect solubility: temperature and pressure.

Explanation:

Temperature affects the solubility of both solids and gases.

Pressure only affects the solubility of gases

The first step in this calculation is to know how many liters is equal to 1 gallon, and the value is 3.785 liters, so now we have to make the following calculation:

1 gal = 3.785 Liters

30.0 gal = x Liters

x = 3.785 * 30.0

x = 114 Liters

299.7g of H2O will be produced.

1st) With the balanced chemical equation and the molar mass of CH4 and H2O, we can calculate the amount of H2O that is produced by stoichiometry:

- CH4 molar mass: 16g/mol

- H2O molar mass: 18g/mol

According to the balanced equation, 16g of CH4 will produce 36g of H2O (2 x 18g).

2nd) Now, with a mathematical rule of three we can calculate the grams of water that will be produced from 133.2 grams of CH4:

Finally, 299.7g of H2O will be produced from 133.2 grams of CH4.

The solution to the equation and value of variable 21(3d - 4) + 100 = 58 is d = 2/3.

Solve the equation 21(3d - 4) + 100 = 58, we can begin by simplifying and isolating the variable:

21(3d - 4) + 100 = 58

Distribute 21 to the terms inside the parentheses:

63d - 84 + 100 = 58

Combine like terms:

63d + 16 = 58

Subtract 16 from both sides:

63d = 42

Divide both sides by 63:

d = 42/63

Simplifying the fraction gives:

d = 2/3

The solution to the equation is d = 2/3.

The solution to the equation 21(3d - 4) + 100 = 58 is d = 2/3. By simplifying the equation, we find that dividing both sides by 63 results in the solution of d = 2/3, which satisfies the original equation.

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Answer:

elements which are basic in nature or we can say that it is a metal so we conclude that it will loose electron or to form an ions

The chemical equation for the reaction between liquid nonane and gaseous oxygen is: C9H20 (l) + 14 O2 (g) → 9 CO2 (g) + 10 H2O (l)

The phases in the equation are:
- (l) for liquid nonane and liquid water
- (g) for gaseous oxygen and gaseous carbon dioxide.

When liquid nonane (C9H20) reacts with gaseous oxygen (O2) to form gaseous carbon dioxide (CO2) and liquid water (H2O), the balanced chemical equation can be expressed as:

C9H20(l) + 14O2(g) → 9CO2(g) + 10H2O(l)

In this equation, the phases are as follows:
- Liquid nonane (C9H20): liquid (l)
- Oxygen (O2): gas (g)
- Carbon dioxide (CO2): gas (g)
- Water (H2O): liquid (l)

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Work function gives the work required for an electron to be emitted from a surface. The work function emitted with photoelectrons of kinetic energy 1.05 eV is 4.74eV.

The photoelectric effect is the emission of an electron by the projected beam of light with energy greater than the work function.

The photoelectric effect is given as,

E = φ + KE

Given,

Kinetic energy of photoelectrons = 1.682 10⁻¹⁹ J (as, 1eV = 1.602 x 10⁻¹⁹ J)

Frequency = 1.40x10¹⁵ s⁻¹

Work function (φ) =?

The work function with respect to frequency is given as,

(6.623 x 10⁻³⁴Js)(1.40x10¹⁵ s⁻¹) = φ + 1.682 x 10⁻¹⁹ J

φ = (9.272 x 10⁻¹⁹) - (1.682 x 10⁻¹⁹)

φ = 7.590 x 10⁻¹⁹ J

Work function in eV is converted as, 1eV = 1.602 x 10⁻¹⁹ J

= 4.74 eV

Therefore, the work function is 4.74eV.

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The stroke volume in the next few cardiac cycles will be 100 ml if the end-diastolic volume is increased from 135ml to 165m.

The formula for stroke volume is given as;

SV = EDV - ESV

Here SV represents stroke volume, EDV represents end-diastolic volume and ESV represents end-systolic volume.

First, we calculate this person's end-systolic volume as follows;

If the person’s stroke volume was 70ml and his initial diastolic volume was 135 ml, then:

70 = 135 - ESV

70 - 135 = -ESV

-65 = -ESV

ESV = 65ml

Now the stroke volume in the next few cycles if the end-diastolic volume increase to 165 ml can be calculated as follows;

SV = 165 - 65

SV = 100ml

Therefore, the stroke volume in the next few cardiac cycles is calculated to be 100ml.

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MgCl₂ in the reaction forms a precipitate.

The chemical reaction in which two ionic bond combine to form an insoluble salt in a aqueous solution is called precipitation reaction. The formation of a precipitate, an insoluble ionic solid, which is the result of precipitation processes, occurs when cations and anions in an aqueous solution interact. The solubility principles for typical ionic solids can be used to assess if such a reaction happens. MgCl₂ produced as a product in the reaction forms precipitate because it is solid in nature and it is an insoluble salt and not dissolve in solution and forms precipitate on the bottom surface of the solution. Thus, MgCl₂ product in the reaction forms a precipitate.

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Answer:

PbSO4    

Explanation:

just took it