Methyl isocyanate, shown as resonance structure 1, can also be represented by other resonance structures. Draw the next most important resonance contributor. Then add curved arrows to each structure to show delocalization of electron pairs to form the other structure.

Include lone pairs of electrons, formal charges, and hydrogen atoms. You can add condensed hydrogens using the More menu, selecting +H and clicking on the carbon as many times as needed.

Answer:

The strong forces oppose the electromagnetic force of repulsion between protons. Like ”glue” the strong force keeps the protons together to form the nucleus. The strong forces and electromagnetic forces both hold the atom together.

Explanation:

Hope This helps

Answer:

The strong forces oppose the electromagnetic force of repulsion between protons.

When the pressure is increased to 90.0 mm Hg, the volume will be approximately 12.30 liters.

To solve this problem, we can use Boyle's Law, which states that the pressure and volume of a gas are inversely proportional at constant temperature.

Initial conditions:

Volume (V1) = 15.2 liters

Pressure (P1) = 0.960 atm

New conditions:

Volume (V2) = 35.0 liters

Pressure (P2) = 90.0 mm Hg

First, we need to convert the pressure from mm Hg to atm:

P2 = 90.0 mm Hg * (1 atm / 760 mm Hg) = 0.1184 atm

Now we can apply Boyle's Law:

P1 * V1 = P2 * V2

0.960 atm * 15.2 L = 0.1184 atm * V2

V2 = (0.960 atm * 15.2 L) / 0.1184 atm

V2 ≈ 12.30 L

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Answer:

The key difference between atomic mass and average atomic mass is that the atomic mass is the mass of an atom, whereas the average atomic mass is the mass of an atom of a particular chemical element calculated by considering isotopes of that element.

Explanation:

Answer:

They increase from left to right and top to bottom.

Answer:

They increase from left to right and top to bottom.

The statement 'when charges pass through the bulb, light is produced' best describes how the charges move through the bulb.

An electrical charge is a type of positive or negative charge of the particles that move in a conductor.

At the atomic level, protons are positively charged particles, electrons are negative, and neutrons do not have a charge.

The electrical charges depend on the charge's initial time, the final time, and the net outward current.

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Answer:

1. 179.2 L

2. 303.62 g

Explanation:

1. Determination of volume of H₂O (g).

We'll begin by calculating the number of mole in 144 g of H₂O. This is illustrated below:

Mass of H₂O = 144 g

Molar mass of H₂O = (2×1) + 16 = 2 + 16 = 18 g/mol

Mole of H₂O =?

Mole = mass /Molar mass

Mole of H₂O = 144/18

Mole of H₂O = 8 moles

Finally, we shall determine volume of H₂O (g) as follow:

1 mole of any gas occupy 22.4L at stp.

Therefore, 8 moles of H₂O (g) will occupy =

8 × 22.4 = 179.2 L

Thus, 144 g of H₂O (g) occupies 179.2 L

2. Determination of the mass of H₂O₂ (g).

We'll begin by calculating the number of mole of H₂O₂ (g) that occupied 200 L at STP. this can be obtained as follow:

1 mole of any gas occupy 22.4 L at stp.

Therefore, Xmol of H₂O₂ (g) will occupy 200 L at STP i.e

Xmol of H₂O₂ (g) = 200/22.4

Xmol of H₂O₂ (g) = 8.93 moles

Thus, 8.93 moles of H₂O₂ (g) occupied 200 L at STP.

Finally, we shall determine the mass of H₂O₂ (g) as follow:

Mole of H₂O₂ (g) = 8.93 moles

Molar mass of H₂O₂ = (2×1) + (2×16) = 2 + 32 = 34 g/mol

Mass of H₂O₂ =?

Mole = mass /Molar mass

8.93 = mass of H₂O₂ /34

Cross multiply

Mass of H₂O₂ = 8.93 × 34

Mass of H₂O₂ = 303.62 g

Answer:

We need more? What else is in the question? This is unanswerable.

Explanation:

Answer:

A

Explanation:

has properties that are different from the original substances.

The pH of the solution is obtained to be 9.67.

A buffer is a solution that serves to militate against changes in acidity or alkalinity. The buffer is often made of a solution of a strong acid and its salt or a weak base and its salt.

Now we have the that;

Number of moles of base = 250 /1000 *  0.80 = 0.2 moles

Number of moles of salt = 150/1000 *  0.50 = 0.075 moles

Total volume of the solution = 250 + 150 = 400 mL or 0.4 L

Molarity of the base = 0.2 moles/0.4 L = 0.5 M

Molarity of the salt =  0.075 moles/ 0.4 L = 0.1875 M

pKb = - log( 1.8 x 10^-5) = 4.74

pOH = pKb + log [salt/base]

pOH =  4.74 + log (0.1875/ 0.5)

pOH = 4.33

pH = 14 - 4.33

pH = 9.67

The pH of the solution is obtained to be 9.67.

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Answer:

B

Explanation:

The geometry of the BF3 molecule is called trigonal planar

Answer:

bf3 is a trigonal shape

Explanation:

no.of pairs = v+m-c+a/2

then it ' ll get 3

so sp2 hybridization

sp2 is a trigonal planar

Explanation:

Avogadro's number represents the number of units in one mole of any substance. Avogadro's number is equal to 6.022 * 10^23.

That means that 1 mol of hydrogen peroxide molecules will contain 6.022 *10^23 molecules.

Answer: a) 6.02 * 10^23

The specific heat capacity of the alloy is 0.120 J/g°C.

What is Specific heat capacity?

Specific heat capacity, also known as specific heat, is the amount of heat required to raise the temperature of a unit mass (usually one gram) of a substance by one degree Celsius or Kelvin. Each substance has its own specific heat capacity, which depends on its chemical composition and physical state. The SI unit of specific heat is joules per gram per degree Celsius (J/g°C).

First, we need to calculate the heat absorbed by the water:

q_water = m_water * C_water * ∆T

where m_water is the mass of water, C_water is the specific heat capacity of water, and ∆T is the change in temperature of the water.

m_water = 50.0 g

C_water = 4.18 J/g°C

∆T = 31.10°C - 22.00°C = 9.10°C

q_water = (50.0 g) * (4.18 J/g°C) * (9.10°C) = 1911.5 J

Next, we need to calculate the heat released by the alloy:

q_alloy = - q_water

Since the calorimeter is insulated, the heat lost by the alloy is equal to the heat gained by the water.

q_alloy = m_alloy * C_alloy * ∆T

where m_alloy is the mass of the alloy, C_alloy is the specific heat capacity of the alloy, and ∆T is the change in temperature of the alloy.

m_alloy = 29.3 g

∆T = 31.10°C - 93.00°C = -61.90°C (note the negative sign)

q_alloy = (29.3 g) * C_alloy * (-61.90°C)

Finally, we can solve for the specific heat capacity of the alloy:

C_alloy = - q_water / (m_alloy * ∆T)

C_alloy = - (1911.5 J) / ((29.3 g) * (-61.90°C))

C_alloy = 0.120 J/g°C

Therefore, the specific heat capacity of the alloy is 0.120 J/g°C.

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☁️ Answer ☁️

annyeonghaseyo!

Your answer is:

it can bond with oxygen to form rust or iron oxide. and it can bond with carbon to form steel.

Here's another one: Iron bonds with lots of things: Oxygen (Ferric Oxide = rust),Chlorine (Ferric Chloride]), Fluorine, ... , even other Iron (in aMetallic Bond or crystal).

Hope it helps.

Have a nice day hyung/noona!~ ￣▽￣❤️

Answer:

magnesium

Explanation:

the metal between strontium and sodium is magnesium

There are 2.64 × 1022 molecules of sucrose present in this serving of fruit dessert containing 15.0 g of sugar.

To determine the number of molecules of sugar present in the serving, we need to calculate the number of moles of sugar and then convert it to the number of molecules.

Given:

Mass of sugar (sucrose) = 15.0 g

Molar mass of sucrose (C12H22O11) = 342 g/mol

First, calculate the number of moles of sugar using the formula:

Number of moles = Mass of substance / Molar mass

Number of moles of sugar = 15.0 g / 342 g/mol ≈ 0.0439 mol

Next, we use Avogadro's number, which states that there are approximately 6.022 × 10^23 molecules in one mole of a substance. Therefore, to find the number of molecules of sugar:

Number of molecules = Number of moles × Avogadro's number

Number of molecules of sugar = 0.0439 mol × 6.022 × 10^23 molecules/mol ≈ 2.64 × 10^22 molecules

Therefore, there are approximately 2.64 × 10^22 molecules of sugar present in this serving.

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Answer:

D is your correct answer

Explanation:

A combustion reaction is a type of chemical reaction in which a fuel reacts with an oxidizing agent, such as oxygen, to produce heat, light, and a variety of reaction products. These reactions typically release energy in the form of heat and light and are usually exothermic, meaning they release energy to the environment. The most common example of a combustion reaction is the burning of fossil fuels, such as coal, oil, and natural gas, which releases energy when they react with oxygen in the air. The chemical equation for a typical combustion reaction can be represented as:

Fuel + Oxygen → Heat + Light + Reaction Products

In a complete combustion reaction, all the carbon and hydrogen in the fuel react with oxygen to form carbon dioxide and water, respectively. In an incomplete combustion reaction, however, some of the carbon and hydrogen in the fuel remain uncombined, forming carbon monoxide and other toxic pollutants.

Answer:

D

Explanation:

A combustion reaction occurs when a substance reacts quickly with oxygen 

Answer:The law of conservation of energy

Explanation:

states that the total energy is constant in any process. Energy may change in form or be transferred from one system to another, but the total remains the same.

Answer:

b) spruce tree

Explanation:

Producers have the capability to produce their own food and energy and are often at the bottom of the food chain. Of the given answers, a white spruce is the only organism that is capapble of producing its own food, therefore it is a producer.

Answer:

7

Explanation:

Answer:

7 is your answer

YW! :)

Explanation:

Answer:

Boiling

Filtration

Distillation

Evaporation

Answer: A model would be useful because the model makes the concepts easier to understand.

Explanation:

Models are helpful tools in science education that can be used to enhance explanations, spark discussion, make predictions, provide visual representations of abstract concepts, and create mental models.

Answer:

The correct answer is A :))

The options that affect the amount that the freezing point is lowered by the addition of the solute include :

The increasing of a solvent's boiling point as a result of the addition of a solute is known as boiling point elevation. Similar to freezing point depression, adding a solute lowers the freezing point of a solvent. In actuality, a solvent's freezing point drops as its boiling point rises.

Any solvent's freezing point will be lowered by the presence of a solute; this action is known as freezing-point depression. The fact that the solute is present in the liquid solution but not in the pure solid solvent is crucial to understanding this phenomenon.

This includes the compound being ionic or the solubility of the solvent.

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Phosphorus triiodide is a nonpolar molecule.

We have to note that the polarity of a molecule would have a lot to do with the shape of the molecule. In other words, the arrangement of the atoms in the molecules tell us if the molecule would be polar or not.

The three iodine atoms are symmetrically positioned around the center phosphorus atom because the molecule has a trigonal pyramidal structure. As a result, the three P-I bonds' respective dipole moments cancel out and provide a net dipole moment of zero.

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Answer:

i need help with that too

Explanation:

The partial charges on each fluorine atom are negative. Option B) The central O atom is the correct answer. Option B

The partial charges in a molecule are determined by the electronegativity values of the atoms involved. Electronegativity is the ability of an atom to attract electrons towards itself in a chemical bond. In the case of \(F_2O\), fluorine (F) is more electronegative than oxygen.

Fluorine is the most electronegative element on the periodic table, meaning it has a high ability to attract electrons. Oxygen is also relatively electronegative but less so than fluorine. When fluorine atoms bond with oxygen, the shared electrons will be pulled more towards the fluorine atoms, creating a polar covalent bond.

In \(F_2O\), each fluorine atom will pull the shared electrons towards itself, resulting in a higher electron density around the fluorine atoms. This creates a region of partial negative charge around the fluorine atoms.

Conversely, the oxygen atom will have a region of lower electron density and, therefore, a partial positive charge. This is because the shared electrons spend more time around the fluorine atoms due to their higher electronegativity.

Option B

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The statement is correct. The photoelectric effect refers to the phenomenon where electrons are ejected from the surface of a material when it is exposed to light. The frequency of light striking an electron in a metal must be above the threshold frequency in order for the photoelectric effect to occur.

The statement is correct. The photoelectric effect refers to the phenomenon where electrons are ejected from the surface of a material when it is exposed to light. However, for the photoelectric effect to occur, the frequency of the incident light must be above a certain threshold frequency.

The threshold frequency is the minimum frequency of light required to dislodge electrons from the material. Below this threshold frequency, regardless of the intensity or duration of the light, no electrons will be emitted.

This behavior can be explained by the particle-like nature of light, where light is composed of discrete packets of energy called photons. The energy of a photon is directly proportional to its frequency. Only photons with energy greater than or equal to the binding energy of the electrons in the material can dislodge them.

Therefore, the frequency of light striking an electron in a metal must be above the threshold frequency in order for the photoelectric effect to occur.

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Answer:

D

Explanation:

Male bowerbirds use their intelligence to impress the females, constructing elaborate structures called bowers to attract mates.

Answer: D. Behavior

Explanation: this is what it says the corresponding answer is on study island