B2 2- orbital picture​

These are 10 unique questions you can ask your fellow classmates about the things they have learned in your special ed classroom:

A special education classroom is a classroom designed to meet the needs of students with disabilities. These classrooms are staffed by specially trained teachers who are able to provide individualized instruction and support to students with a variety of disabilities.

These questions are designed to get your classmates thinking about the things they have learned in your special ed classroom and how those things have impacted them. The answers to these questions can be used to create a powerful and informative ad for your classroom.

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Answer:

65.25%

Explanation:

To determine the percent composition of oxygen in H₂SO₄, we need to calculate the mass of oxygen relative to the total molar mass of H₂SO₄ and express it as a percentage.

Step 1: Calculate the molar mass of H₂SO₄.

H₂SO₄ consists of two hydrogen atoms (H), one sulfur atom (S), and four oxygen atoms (O). The atomic masses of these elements are:

H = 1.01 g/mol

S = 32.07 g/mol

O = 16.00 g/mol

Molar mass of H₂SO₄ = (2 × H) + S + (4 × O)

= (2 × 1.01) + 32.07 + (4 × 16.00)

= 98.09 g/mol

Step 2: Calculate the mass of oxygen in H₂SO₄.

Since there are four oxygen atoms in one molecule of H₂SO₄, the mass of oxygen is:

Mass of oxygen = 4 × (molar mass of O)

= 4 × 16.00

= 64.00 g

Step 3: Calculate the percent composition of oxygen.

Percent composition of oxygen = (mass of oxygen / total molar mass of H₂SO₄) × 100

= (64.00 / 98.09) × 100

≈ 65.25%

Therefore, the percent composition of oxygen in H₂SO₄ is approximately 65.25%.

Hope this helps!

Approximately 12.27 grams mass of AgCl will be produced from 5g of NaCl and 103g of AgNO₃.

Given information,

Mass of NaCl = 5g

Mass of AgNO₃ = 103g

The number of moles of NaCl and AgNO₃:

Molar mass of NaCl = 22.99 + 35.45 = 58.44 g/mol

Number of moles of NaCl = 5.00/ 58.44 = 0.0856 mol

Molar mass of AgNO₃ = 107.87 + 14.01 ) + 3 × 16.00 = 169.87 g/mol

Number of moles of AgNO₃ = 103 / 169.87 = 0.606 mol

The stoichiometry of the balanced chemical equation between NaCl and AgNO₃:  AgNO₃ + NaCl → AgCl + NaNO₃

1 mole of AgNO₃ reacts with one mole of NaCl to produce one mole of AgCl.

For NaCl: Moles of AgCl produced from NaCl = 0.0856 mol

For AgNO₃: Moles of AgCl produced from AgNO₃ = 0.606 mol

Since NaCl produces fewer moles of AgCl, it is the limiting reactant.

Molar mass of AgCl = 107.87 + 35.45 = 143.32 g/mol

Mass of AgCl produced from NaCl = 0.0856 × 143.32 ≈ 12.27 g

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The molarity of the solution, if 44g of [tex]CaCl_{2}[/tex] is dissolved in 95 ml of water is 4.1733 M

To calculate the molarity (M) of a solution, we use the formula:

Molarity (M) = moles of solute/volume of solution in liters

As per the question:

Mass of [tex]CaCl_{2}[/tex] = 44 g

Volume of water = 95 mL = 0.095 L

To find molarity, we need to determine the number of moles of [tex]CaCl_{2}[/tex] by dividing the given mass by its molar mass.

Molar mass of [tex]CaCl_{2}[/tex] = 40.08 g/mol (for [tex]Ca[/tex]) + (2 × 35.45 g/mol) (for [tex]Cl[/tex])

Molar mass of [tex]CaCl_{2}[/tex] = 110.98 g/mol

Number of moles of [tex]CaCl_{2}[/tex] = Mass of [tex]CaCl_{2}[/tex] / Molar mass of [tex]CaCl_{2}[/tex]

Number of moles of [tex]CaCl_{2}[/tex] = 44 g / 110.98 g/mol

Number of moles of [tex]CaCl_{2}[/tex] ≈ 0.3965 mol

Now, to calculate the molarity of the solution, we can use this formula:

Molarity (M) = moles of solute/volume of solution in liters

Molarity (M) = 0.3965 mol / 0.095 L

Molarity (M) ≈ 4.1733 M

Therefore, the molarity of the solution is approximately 4.1733 M when 44 g of [tex]CaCl_{2}[/tex] is dissolved in 95 mL of water.

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Some examples of chemical compounds that are formed by swapping the valencies are:

In chemistry, one can analyze an element's combining capacity with other atoms through its valency, crucial for creating chemical compounds or molecules.

Recently, an article featured a comparable description detailing atomic valence as "the electrons utilized by the atom during bonding." There are also two distinct formulas available to determine the element's level of valence.

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When the temperature is lowered to -76 °C and the pressure is 0.561 atm, the volume of the balloon will be approximately 179 L.

To solve this problem, we can use the combined gas law equation, which relates the initial and final conditions of a gas sample:

(P1 * V1) / (T1) = (P2 * V2) / (T2)

where P1, V1, and T1 are the initial pressure, volume, and temperature, respectively, and P2, V2, and T2 are the final pressure, volume, and temperature, respectively.

Substituting the given values:

(P1 * 266 L) / (38 + 273.15 K) = (0.561 atm * V2) / (-76 + 273.15 K)

Simplifying the equation:

(0.995 atm * 266 L) / (311.15 K) = (0.561 atm * V2) / (197.15 K)

Solving for V2:

V2 = [(0.995 atm * 266 L) / (311.15 K)] * (197.15 K / 0.561 atm)

V2 ≈ 179 L

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The volume the gas will occupy at pressure of 138.7 KPa, given that the temperature remains the same is 136 mL

The new volume of the gas, given that the new pressure is 138.7 KPa can be obtained as follow:

P₁V₁ = P₂V₂

Inputting the given parameters, we have:

135.5 × 139.3 = 138.7 × V₂

18875.17 = 138.7 × V₂

Divide both side by 138.7

V₂ = 18875.17 / 138.7

V₂ = 136 mL

Thus, we can conclude that the volume of the gas will be 136 mL

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Answer:

Basically, they r different chemically and radically.

Explanation:

Here is how:

So,

Magnesium compounds found in surface water can vary depending on the specific water source and environmental factors. However, some common magnesium compounds that can be present in surface water include:

Magnesium Carbonate (MgCO3): This compound can form when magnesium ions (Mg2+) react with carbonate ions (CO32-) present in the water. It is often found in areas where there are limestone or dolomite formations.

Magnesium Hydroxide (Mg(OH)2): This compound can occur when magnesium ions react with hydroxide ions (OH-) in the water. It is more likely to be present in alkaline or basic water conditions.

Magnesium Sulfate (MgSO4): This compound can form when magnesium ions react with sulfate ions (SO42-) in the water. It can be found in areas where there are sulfates present, such as in some mining or industrial areas.

Now, let's compare these magnesium compounds to minerals like calcium carbonate and soluble sugar in lemonade:

Calcium Carbonate (CaCO3): Calcium carbonate is a common mineral found in many natural sources, including limestone, chalk, and shells of marine organisms. It is insoluble in water and tends to precipitate out of the solution, forming solid deposits or scale.

Soluble Sugar in Lemonade: Lemonade typically contains sucrose or other soluble sugars. These sugars are highly soluble in water, meaning they readily dissolve and form a homogeneous mixture with water.

In comparison to magnesium compounds found in surface water, calcium carbonate and soluble sugar in lemonade are chemically different. Calcium carbonate is insoluble in water and tends to separate from the solution, while soluble sugars dissolve completely.

The number of particles of copper produced when 3.85 grams of Copper (II) Chloride is consumed is approximately [tex]1.728 * 10^2^2[/tex] particles.

To determine the number of particles of copper produced when 3.85 grams of Copper (II) Chloride is consumed with excess aluminum, we need to use stoichiometry and the balanced chemical equation for the reaction.

The balanced chemical equation for the reaction between Copper (II) Chloride (CuCl2) and aluminum (Al) is:

[tex]3CuCl_2 + 2Al[/tex] -> [tex]2AlCl_3 + 3Cu[/tex]

From the balanced equation, we can see that for every 3 moles of[tex]CuCl_2[/tex]consumed, 3 moles of Cu are produced.

First, we need to calculate the number of moles of [tex]CuCl_2[/tex] in 3.85 grams. To do this, we divide the mass of[tex]CuCl_2[/tex] by its molar mass. The molar mass of [tex]CuCl_2[/tex] can be calculated by summing the atomic masses of its constituent elements: Cu (63.55 g/mol) and Cl (35.45 g/mol).

Molar mass of[tex]CuCl_2[/tex] = 63.55 g/mol (Cu) + (2 * 35.45 g/mol) (Cl) = 134.45 g/mol

Number of moles of CuCl2 = 3.85 g / 134.45 g/mol ≈ 0.0287 mol

Since the stoichiometry of the reaction states that 3 moles of CuCl2 produce 3 moles of Cu, we can conclude that 0.0287 mol of CuCl2 will produce 0.0287 mol of Cu.

Finally, to calculate the number of particles (atoms or molecules) of copper produced, we multiply the number of moles of Cu by Avogadro's number, which is approximately [tex]6.022 * 10^2^3[/tex]particles/mol.

Number of particles of Cu = 0.0287 mol * [tex]6.022 * 10^2^3[/tex] particles/mol

Therefore, the number of particles of copper produced when 3.85 grams of Copper (II) Chloride is consumed is approximately [tex]1.728 * 10^2^2[/tex]particles.

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The balanced diet refers to consuming a variety of foods in appropriate proportions to provide all the necessary nutrients, vitamins, and minerals required for optimal health and well-being.

(a) It involves incorporating different food groups, such as fruits, vegetables, grains, protein sources, and dairy products, to ensure the body receives a proper balance of essential nutrients.

(b) Magellan took live animals on the voyage for various reasons. Firstly, the animals provided a source of fresh food, such as meat, milk, and eggs, which could supplement their diet during the long journey. Secondly, the animals could be used for breeding, ensuring a sustainable supply of food in case of shortages. Additionally, live animals were also valuable for trade and barter with indigenous communities encountered during the voyage.

(c) (I) A deficiency disease refers to a health condition that occurs due to a lack or inadequate intake of specific nutrients, vitamins, or minerals essential for normal bodily functions.

(lI) One symptom of scurvy is the development of swollen, bleeding gums. Other symptoms may include fatigue, weakness, joint pain, shortness of breath, and impaired wound healing.

(IlI) Scurvy is caused by a severe deficiency of vitamin C (ascorbic acid). Vitamin C is necessary for the production of collagen, a protein that helps maintain the health of blood vessels, gums, and other connective tissues in the body.

(iv) Elcaro did not develop scurvy because it is likely that they had access to fresh fruits and vegetables during the voyage. Fresh fruits and vegetables are excellent sources of vitamin C, and their consumption would have prevented the deficiency. The absence of scurvy among the crew of Elcaro suggests that they had a sufficient intake of vitamin C through their diet, avoiding the vitamin C deficiency responsible for scurvy.

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Answer:

2.282 atm

P1V1/T1 = P2V2/T2

2.70atm / (50+273) = X/ 273

make x subject of formula

:. X = 2.28 atm

or 2.28 * 1.01 *10⁵ N/m²

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Taking into account definition of theoretical yield, Cl₂ is the limiting reagent and the theoretical yield is 100.31 grams of AlCl₃ if 60 g Al react with 80 g of Cl₂ and produce aluminum chloride

In first place, the balanced reaction is:

2 Al + 3 Cl₂ → 2 AlCl₃

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

The molar mass of the compounds is:

Then, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:

The limiting reagent is one that is consumed first in its entirety, determining the amount of product in the reaction.

To determine the limiting reagent, it is possible to use a rule of three as follows: if by stoichiometry 54 grams of Al reacts with 212.7 grams of Cl₂, 60 grams of Al reacts with how much mass of Cl₂?

mass of Cl₂= (60 grams of Al× 212.7 grams of Cl₂)÷54 grams of Al

mass of Cl₂= 236.33 grams

But 236.33 grams of Cl₂ are not available, 80 grams are available. Since you have less mass than you need to react with 60 grams of Al, Cl₂ will be the limiting reagent.

The theoretical yield is the amount of product acquired through the complete conversion of all reagents in the final product, that is, it is the maximum amount of product that could be formed from the given amounts of reagents.

Considering the limiting reagent, the following rule of three can be applied: if by reaction stoichiometry 212.7 grams of Cl₂ form 266.7 grams of AlCl₃, 80 grams of Cl₂ form how much mass of AlCl₃?

mass of AlCl₃= (80 grams of Cl₂×266.7 grams of AlCl₃)÷212.7 grams of Cl₂

mass of AlCl₃= 100.31 grams

Finally, the theoretical yield is 100.31 grams of AlCl₃.

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Le Chatelier's Principle tells us what happens to the equilibrium of a chemical system (reaction) when certain stresses are inflicted onto it.

When the temperature of a system is increased, the system moves away from the heat. For instance, for a forward exothermic reaction, it would move to the reactants side, favouring the endothermic reaction. For a forward endothermic reaction, it would however favour the forward reaction with an increase in heat.

The opposite occurs when heat is removed.

When the concentration of a reactant is increased, the equilibrium shifts to the right and favours the formation of products. The opposite occurs when the concentration of a product is increased, it shifts to the left.

Pressure and volume are inversely proportional, meaning an increase in pressure leads to a decrease in volume (and vice versa). When pressure is increased/volume is decreased, the system shifts in the direction of least moles/molecules. Count the sum of the coefficients on the reactants and products side to determine which side this is.

Again, the opposite occurs when pressure is decreased or volume is increased; the system shifts to the side with more moles.

Taking into account all the pieces of information mentioned above, here is what our answers should be to the given question:

A. Increasing [SO2]: shifts right

B. Removing O2: shifts left

C. Increasing temperature: shifts left

D. Decreasing pressure: shifts left

E. Add a catalyst: no effect

The balanced chemical equation is CaS + AlC → A + CaC

To balance the chemical equation CaS + AlC → A + CaC, we need to ensure that the same number of atoms of each element is present on both sides of the equation. Here's the step-by-step process to balance the equation:

Begin by counting the number of atoms of each element on both sides of the equation.

Left side (reactants):

Calcium (Ca): 1

Sulfur (S): 1

Aluminum (Al): 1

Carbon (C): 1

Right side (products):

A: 1

Calcium (Ca): 1

Carbon (C): 1

Sulfur (S): 0

Start by balancing the elements that appear in the fewest compounds. In this case, we can balance sulfur (S) first. Since there is only one sulfur atom on the left side and none on the right side, we need to add a coefficient of 1 in front of A on the right side to balance the sulfur.

CaS + AlC → 1A + CaC

Next, balance calcium (Ca) by adding a coefficient of 1 in front of CaS on the left side.

1CaS + AlC → 1A + CaC

Now, balance aluminum (Al) by adding a coefficient of 1 in front of AlC on the left side.

1CaS + 1AlC → 1A + CaC

Finally, balance carbon (C) by adding a coefficient of 1 in front of CaC on the right side.

1CaS + 1AlC → 1A + 1CaC

The balanced chemical equation is:

CaS + AlC → A + CaC

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Answer:

First, let's consider the ratio: 1:25. This means that for every 1 gram of solute, we have 25 milliliters of solvent. Therefore, if we have 100 milliliters of the solution, we can set up a proportion to find the amount of solute in grams:

1 gram solute / 25 milliliters solvent = x grams solute / 100 milliliters solution

Cross-multiplying, we get:

25 * x = 1 * 100

25x = 100

x = 100 / 25

x = 4

So, in 100 milliliters of a 1:25 (weight/volume) solution, there are 4 grams of solute.

To calculate the percent strength, we divide the mass of the solute (4 grams) by the volume of the solution (100 milliliters) and multiply by 100:

Percent strength = (mass of solute / volume of solution) * 100

Percent strength = (4 g / 100 mL) * 100

Percent strength = 4%

Therefore, the percent strength of a 1:25 (weight/volume) solution is 4%.

At a pressure of 1.13 atm and a volume of 35.9 L, 0.750 mol of an ideal gas will occupy a temperature of approximately 387.66°C.

Given information,

Pressure (P) = 1.13 atm

Volume (V) = 35.9 L

Number of moles (n) = 0.750 mol

The ideal gas law equation: PV = nRT

Where:

P = pressure (in atm)

V = volume (in liters)

n = number of moles

R = ideal gas constant (0.0821 L·atm/(mol·K))

T = temperature (in Kelvin)

Now,

T = PV / (nR)

T = (1.13 * 35.9 ) / (0.750 * 0.0821)

T = (40.607 atm·L) / (0.061575 mol·L/(K·atm))

T ≈ 660.81 K

T(°C) = T(K) - 273.15

T(°C) ≈ 660.81 - 273.15

T(°C) ≈ 387.66°C

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There are approximately [tex]1.258 x 10^2^3[/tex] formula units in 50.0 g of PbO2.

We must utilize the molar mass of PbO2 (lead dioxide) and the idea of Avogadro's number to calculate the number of formula units in a given mass of PbO2.

The molar mass of PbO2 is calculated as follows:

1 atom of Pb (lead) has a molar mass of approximately 207.2 g/mol.

2 atoms of O (oxygen) have a combined molar mass of approximately 32.0 g/mol (16.0 g/mol per oxygen atom).

Therefore, the molar mass of PbO2 is:

Molar mass of PbO2 = (1 * molar mass of Pb) + (2 * molar mass of O)

= (1 * 207.2 g/mol) + (2 * 16.0 g/mol)

= 207.2 g/mol + 32.0 g/mol

= 239.2 g/mol

Now, we can use the molar mass to determine the number of formula units in 50.0 g of PbO2.

Number of moles = Mass (in grams) / Molar mass

= 50.0 g / 239.2 g/mol

≈ 0.209 moles (rounded to three decimal places)

Since 1 mole of any substance contains Avogadro's number of particles [tex](approximately 6.022 x 10^2^3),[/tex]we can calculate the number of formula units by multiplying the number of moles by Avogadro's number:

Number of formula units = Number of moles * Avogadro's number

[tex]= 0.209 moles * (6.022 x 10^2^3 formula units/mole)[/tex]

≈[tex]1.258 x 10^2^3 formula units[/tex]

Therefore, there are approximately[tex]1.258 x 10^2^3[/tex] formula units in 50.0 g of PbO2.

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An impact of the specific heat of the water on the planet is that islands and coastal places have moderately pleasant climates. Therefore, option A is correct.

The specific heat of water is relatively high compared to other substances. This means that water requires a significant amount of heat energy to increase its temperature. As a result, water has a stabilizing effect on the climate of coastal and island regions.

The high specific heat of the water helps to moderate temperature changes, resulting in milder and more pleasant climates in these areas.

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Answer:

[tex]\large \textsf{If the Keq of a reaction is 4$\times$10$^{-7}$, then:}\\\\\large \textsf{$\implies$ the equilibrium lies slightly to the left.}[/tex]

The position or extent of a chemical equilibrium can be expressed quantitatively using the equilibrium constant (Keq). If the value of Keq is large, then the equilibrium lies to the right (the product side). If the value of Keq is small, then the equilibrium lies to the left (the reactant side).

In terms of sizing, a small value of Keq usually ranges from 10⁻¹⁰ to 10⁻⁵⁰ and beyond. A large value of Keq usually ranges from 10¹⁰ and onwards.

∴ for a Keq of 4×10⁻⁷, we say that the equilibrium lies slightly to the left.

Answer:

[tex]\huge\boxed{\sf 1.869\ L}[/tex]

Explanation:

Given that,

Mass = m = 2.67 g

Molar mass (O₂) = 16 × 2 = 32 g/mol

We know that,

No. of moles = 2.67 / 32

No. of moles = 0.08 moles

Also, we know that:

1 × 0.08 moles of O₂ at STP = 22.4 × 0.08 L

So, the volume of 0.08 moles of oxygen gas at STP will be 1.869 L.

[tex]\rule[225]{225}{2}[/tex]

Monovalent Valency, Divalent Valency and Multivalent Valency are three types of valency.

Valency refers to the combining capacity of an atom to form chemical bonds. There are three types of valency:

Monovalent: Atoms with a valency of 1 can form only one bond. Examples include hydrogen (H) and chlorine (Cl), which can each form one bond.

Divalent: Atoms with a valency of 2 can form two bonds. Oxygen (O) and calcium (Ca) are examples of divalent atoms.

Multivalent: Atoms with multiple valencies can form different numbers of bonds. Transition metals such as iron (Fe) and copper (Cu) exhibit multivalency, allowing them to form varying numbers of bonds, depending on the specific compound and oxidation state.

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answer

To determine the number of moles in 4 liters of this solution, you can use the formula:

moles = concentration (M) x volume (L)

Substituting the given values:

moles = 3.0 M x 4 L

moles = 12 moles

Therefore, there would be 12 moles of HCl in 4 liters of the 3.0 M HCl solution.

The molarity of potassium hydroxide in the resulting solution is 0.129 M.

Molarity of a substance refers to the concentration of a substance in solution, expressed as the number of moles of solute per litre of solution.

According to this question, a student weighs out a 2.17g sample of KOH, transfers it to a 300. mL volumetric flask, adds enough water to dissolve it and then adds water to the 300. mL tick mark.

No of moles of KOH = 2.17g ÷ 56.11g/mol = 0.039 moles

Molarity = 0.039 moles ÷ 0.3L = 0.129 M

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The addition of a catalyst to this reaction would cause a change in "I" indicated energy differences.

If a catalyst is added to a reaction, it typically affects the activation energy (Ea) of the reaction. The activation energy is the energy barrier that needs to be overcome for the reaction to proceed.

In the context of the energy diagram for the reaction X + Y -> Z, the addition of a catalyst would primarily affect the energy difference related to the activation energy. Let's consider the options:

It is generally expected that the addition of a catalyst would primarily affect the activation energy (Ea) of the reaction, which is typically associated with the energy difference labeled as "I" on energy diagrams.

Therefore, the answer is: I only: The addition of a catalyst would cause a change in the energy difference labeled as "I" on the energy diagram.

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The value of ΔG for the first reaction was calculated to be -16,21,956 kJ. The reaction is spontaneous as the value of ΔG is negative. The value of ΔS for the second reaction is 3.8 J/K. In the second equation, neither the forward nor the reverse reaction is spontaneous.

ΔG only relates to variations where the temperature and the pressure are constant. This is where most reactions take place in the lab. The system is typically open to the environment (constant pressures) and the reaction is started or ended at room temperature.

If ΔG < 0, the process is spontaneous. If ΔG = 0, the system is stable. If ΔG > 0, the process isn’t spontaneous according to the formula but occurs in the opposite direction.

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Diatomic: Composed of two atoms. Polar: A bond with a negative end and a positive end. Nonpolar: A bond in which neither atom takes more than its share of electrons. Metallic: A type of bond that allows valence electrons to move freely among ions. Electronegativity: Determines what type of bond will form.

The ability of an atom or functional group to draw electrons to itself is known as electronegativity in chemistry.

Diatomic molecules consist only of two atoms, whether they are from the same or distinct chemical elements.

Since charges fluctuate, a momentary dipole moment occurs in a so-called nonpolar molecule at any given time if the charge arrangement is spherically symmetric when averaged across time.

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There are approximately 2.8939 x[tex]10^2^4[/tex] carbon atoms in 0.37 mol of procaine.  The molecular formula of procaine (C₁₃H₂₀N₂₀₂), one can see that there are 13 carbon atoms (C13) in one molecule of procaine.

Avogadro's number (6.022 x [tex]10^2^3[/tex]) represents the number of particles (atoms, molecules, or formula units) in one mole of a substance

The number of molecules of procaine in 0.37 mol:

Number of molecules = 0.37 mol x (6.022 x[tex]10^2^3[/tex] molecules/mol)

Number of carbon atoms = Number of molecules x 13 carbon atoms/molecule

Number of molecules = 0.37 mol x (6.022 x [tex]10^2^3[/tex]molecules/mol)

= 2.22614 x [tex]10^2^3[/tex]molecules

Number of carbon atoms = 2.22614 x [tex]10^2^3[/tex] molecules x 13 carbon atoms/molecule

= 2.8939 x [tex]10^2^4[/tex]carbon atoms

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Answer:

Particulate matter pollution decreases the amount of sunlight plants can absorb for photosynthesis.

Explanation: