(04.04 MC)
Which table best shows the impacts resulting from human activity? (6 points)

The answer is: The electronic configuration of Nitrogen is \(1s^22s^22p^3\).

Electronic configuration: The electronic configuration is defined as the distribution of electrons of an atom in the atomic or molecular orbitals and is written using the labels for the subshell.

How to decide which orbital is filled first?

(Shown in image)

         \(1s^22s^22p^3\)

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Nitrogen's complete electron configuration is 12s2s22p3.

The shorthand electron configuration for noble gases is [He] 2s22p3. Nitrogen has an atomic number of 7. The nitrogen atoms' nucleus contain this many protons. An atom that is neutral has an equal number of protons and electrons. Thus, the ground state electron configuration will consist of 7 electrons in the suitable s and p orbitals (state of lowest energy). For nitrogen, the entire electron configuration is 1s22s22p. Scientists may easily express and explain how the electrons are organized around the nitrogen atom's nucleus by using the configuration notation for nitrogen (N). As a result, it is simpler to comprehend and forecast how atoms will cooperate to form chemical bonds.

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Answer:

B) exothermic.

Explanation:

Hello!

In this case, we need to keep in mind that exothermic reactions release heat, so they increase the temperature as the final energy is less than the initial energy; in contrast, endothermic reactions absorb heat, so they decrease the temperature as the final energy is greater than the initial energy.

In such a way, when a dissolution process shows off a negative enthalpy of dissolution, we infer it is an exothermic process due to the aforementioned; therefore, the answer is:

B) exothermic .

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Answer:

Explanation:

What do you understand about equivalent weight for lime requirement?

If field data are not available, lime requirements can be determined with the solution is added to a given weight or volume of soil and the pH is measured.  Each milligram per liter of sodium bicarbonate is equal to 0.56 mg/L of alkalinity. A winter wheat crop grown on a light sand soil in a low rainfall area will mean an

Answer:

You can expect the balloon to expand a little

Explanation:

The molecules in the balloon will be heated up once they feel the warmth of the summer heat and start moving a lot faster

ANSWER

EXPLANATION

When an organic compound is burns in air, the type of reaction is called a combustion reaction.

The major products formed when an organic compound undergoes a combustion reaction are carbon dioxide and water.

To write a balanced equation for the reaction, follow the steps below

The combustion formula is written below as

The compound given is pentane because it has 5 carbon atoms

Answer:

See explanation

Explanation:

A Lewis structure is also called a dot electron structure. A Lewis structure represents all the valence electrons on atoms in a molecule as dots. Lewis structures can be used to represent molecules in which the central atom obeys the octet rule as well as molecules whose central atom does not obey the octet rule.

Sometimes, one Lewis structure does not suffice in explaining the observed properties of a given chemical specie. In this case, we evoke the idea that the actual structure of the chemical specie lies somewhere between a limited number of bonding extremes called resonance or canonical structures.

The canonical structure of the carbonate ion as well as the lewis structure of phosphine is shown in the image attached to this answer.

Answer:

\(keq=\frac{[NH_{3} ]^2}{[N_{2} ][H_{2} ]^3}\)

Explanation:

The molecules in a copper penny is closely packed and and has no space to move apart thus the material will be denser than that in the molten state. That's why the penny sink in the molten copper.

Copper is a transition metal exhibiting all the metallic properties. The molten state of metals is the fluid state where the molecule are not strongly held by the metallic bonds.

Molten material is made by melting them and the liquid like state contains molecules with some space to move apart. Whereas, in solid state as in a copper penny, the molecules are closely packed and have no space to move apart.

An object will sink in a liquid if it is less dense than the liquid. Copper penny is denser than the molten copper because the molecules are densely packed and it will sink on to it.

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From the statement and the information available in the question, the pH of the solution is 12.2.

The term Ka refers to the acid dissociation constant of a substance, we can obtain this by setting up the ICE table as shown;

       C6H5O^-  +   H2O ⇄  C6H5OH + OH^-

I         0.250                           0                0

C         -X                                +X             +X

E      0.250 -x                         x                x

Now;

Kb = 1 * 10^-14/ 1.0 x 10-10

Kb = 1 * 10^-4

Kb = [C6H5OH] [OH^-]/[C6H5O^-]

1 * 10^-4 = x^2/ 0.250 -x

1 * 10^-4 (0.250 -x) = x^2

2.5 * 10^-4 - 1 * 10^-4 x = x^2

x^2 + 1 * 10^-4 x  - 2.5 * 10^-4 = 0

x=0.016 M

Given that; [C6H5OH] = [OH^-] =x

pOH = -log(0.016 M) = 1.8

pH = 14 - 1.8 = 12.2

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The volume of 0.5 M HCOOH required is 50 mL and the volume of 0.5 M HCOONa required is 150 mL.

To prepare a pH 4.50 buffer with a buffer strength of 0.1 M, we need to use a mixture of HCOOH and HCOONa in a specific ratio. The buffer equation for this system is:

\(pH = pKa + log([HCOO-]/[HCOOH])\)

Substituting the given pH of 4.50 and pKa of 3.75:

We can then use the Henderson-Hasselbalch equation:

\([HCOOH]/[HCOO-] = 3.16 \\\\[HCOOH] + [HCOO-] = 0.1 M\)

Solving these equations simultaneously, we get:

\([HCOOH] = 0.0253 M\) and \([HCOO-] = 0.0747 M.\)

Therefore, the volume required is 50 mL and the volume of 0.5 M HCOONa required is 150 mL, to prepare 0.1 L of pH 4.50 buffer with a buffer strength of 0.1 M.

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Answer:

The answer is A. an unbalanced force

Explanation:

This is because the force from the hammer on the nail causes a force that unbalanced  normal forces on the nail.

Answer:

magnitude and direction

Explanation:

im bumb like really bumb

Answer:

d

Explanation:

answer d makes the equation balance

Answer:

0.102 mol

Explanation:

Step 1: Write the balanced equation

PCl₅ + 4 H₂O ⇒ 5 HCl + H₃PO₄

Step 2: Calculate the moles corresponding to 7.36 g of H₂O

The molar mass of H₂O is 18.02 g/mol.

7.36 g × 1 mol/18.02 g = 0.408 mol

Step 3: Calculate the moles of PCl₅ required to react with 0.408 moles of H₂O

The molar ratio of PCl₅ to H₂O is 1:4.

0.408 mol H₂O × 1 mol PCl₅/4 mol H₂O = 0.102 mol PCl₅

The structure of Arg-Ile-Tyr is given below:

Peptides make up short chains of amino acids, which act as the fundamental units for building proteins. Within these chains, peptides usually consist of no more than 50 amino acids in contrast to proteins that are made up of significantly longer structures.

Found throughout various sources such as plants, animals, and bacteria, peptides play crucial roles in multiple biological processes including signaling, enzyme activity, and immune response.

Additionally, artificially synthesized peptides serve several purposes within the medicine, cosmetics, and food industries. Scientists are also exploring certain peptide's potential therapeutic advantages mainly pertaining to anti-inflammatory, antimicrobial, and anticancer activities.

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A 500.0 g sample of aluminum, initially at 25.0 degrees, absorbs heat from its surroundings and reaches a final temperature of 90.7 degrees. 32.62245 kJ heat has been absorbed by the sample.

The term specific heat is defined as the amount of heat required to increase the temperature of 1 gram of a substance 1 degree Celsius (°C).

To calculate the amount of heat absorbed by the sample, use the formula:

Q = mcΔT

where Q is the amount of heat absorbed by the sample, m is the mass of the sample, c is the specific heat of aluminum, and ΔT is the change in temperature of the sample.

Substituting the given values into the formula, we get:

Q = 500.0 g × 0.9930 J/g·K × (90.7°C - 25.0°C)

Q = 500.0 g × 0.9930 J/g·K × 65.7 K

Q = 32,622.45 J

To convert the result to kilojoules (kJ), we divide by 1000:

Q = 32.62245 kJ

Thus, the amount of heat absorbed by the sample is 32.6 kJ.

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Answer:

1. B

2. C

3. B or D

6. A

7. D

8. A

9. A

Explanation:

Brainliest plz answered to the best of my abilitys

The ΔH°rxn for the reaction MgO(s) + CO2(g) à MgCO3(s) is -100. kJ mol-1.

What is enthalpy ?

Enthalpy is a property or state function that resembles energy; it has the same dimensions as energy and is therefore measured in joules or ergs. The value of enthalpy is solely dependent on the temperature, pressure, and composition of the system, not on its history.

Using ΔH° = ∑ΔfH°(products) – ∑ΔfH°(reactants), the enthalpy change is:

ΔH° = ΔfH°(MgCO3(s)) – [ΔfH°(MgO(s)) + ΔfH°(CO2(g))]

= (-1096 – [-394 -602]) kJ mol-1

= -100. kJ mol-1

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Answer:

Dry ice is the name for carbon dioxide in its solid state. At room temperature, it will go from a solid to a gas directly. While carbon dioxide gas is invisible, the very cold gas causes water vapor in the air to condense into water droplets, thus creating fog.

Answer:

B. Delta

Explanation:

The value of the pressure calculated from the Vander Waal equation is slightly less than that is calculated from the ideal gas equation.

We know that the ideal gas equation assumes that there is no interaction that exists between gas molecules. The ideal gas equation corrects the ideology with the addition of constants that take care of possible interaction between gases.

Now, using the ideal gas equation;

PV =nRT

P = ?

V =  30.0L

T = 600.0K

n = 1.00 mol

R = 0.082 atmLK-1mol-1

P = nRT/V

P =  1.00 mol *  0.082 atmLK-1mol-1 *  600.0K/30.0L

P = 1.64 atm

Using the Vander Waal equation

a = 6.49

b = 0.0562

Thus;

P = RT/V - b  -  a/V^2

P = 0.082 * 600.0/30.0 - 0.0562 - 6.49/(30)^2

P = 49.2/29.9438 - 6.49/900

P = 1.64 - 0.00721

P = 1.63 atm

Thus the value of the pressure calculated from the Vander Waal equation is slightly less than that is calculated from the ideal gas equation.

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Answer:

The answer is 30%

The rate of the formation of nitrogen dioxide can be obtained as 0.800 mol/L. Option D

The rate of reaction depends on various factors, including the nature of the reactants, the concentrations of the reactants, the temperature, the presence of catalysts, and the surface area of the reactants. It is determined by the collision of particles and their energy, orientation, and the effectiveness of the collision in breaking and forming chemical bonds.

We have that;

1/4d[\(O_{2}\)]/dt = d[\(NO_{2}\)]/dt

Thus;

Rate of formation of the nitrogen dioxide = 2 * 0.200 mol/L

= 0.800 mol/L

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Answer:

so for every 1 kg it's 10 to the three. So we multiply 5.84 times 47.867 divided by 10 to the three, which is just 1000. Doing that should give you 0.280 kg of titanium.

Explanation:

The mass of 5.84 moles of titanium (Ti) is 0.279 kg.

Moles can be defined as the amount of substances present in a system that contain the same number of entities as the number of atoms in 12g of carbon 12.

Given moles of Titanium = 5.84 moles

Molar mass of Titanium = 47.867 g

Mass = Moles x Molar mass

Mass of Titanium = 5.84 x 47.867

= 279.54g

To convert in kgs = 279.54 / 1000

= 0.279kg

Hence, the mass of 5.84 moles of titanium (Ti) is 0.279 kg.

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Answer: Sodium chloride forms from the ionic bonding of sodium ions and chloride ions. There is one sodium cation (Na+) for every chloride anion (Cl–), so the chemical formula is NaCl

Explanation: