how many molecules are there in 125 grams of sugar, C12H22O11

Use the formal charge for each atom in each of the lewis structures given, to the one more likely shows the correct connectivity for NOF is

O = N - F.

formal charge for N = O - F

formal charge = valence electrons - non bonding electrons - (1/2) bonding

                                                                                                          electrons

formal charge for N = 5 - 4 - (1/2) 4

                                 = -1

formal charge for O = 6 - 2 - (1/2)6

                                 = +1

formal charge for F = 7- 6 - (1/2)2

                                = 0

formal charge for O = N - F

formal charge for N = 5 - 2 - (1/2)6

                                 = 0

formal charge for O = 6 - 4 - (1/2) 4

                                 = 0

formal charge for F = 7 -  6 - (1/2)2

                                 = 0

Thus, Use the formal charge for each atom in each of the lewis structures given, to the one more likely shows the correct connectivity for NOF is  O = N - F because in  this structure all atoms have zero formal charge.

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Answer:

A

Explanation:

The answer is A because Hydrogen is an Atom consists of 1 electron only.

Good luck

To accurately classify the changes in the PhET simulation's effect on the wavelength, a description of the available changes and their respective bins is necessary In general, changes that can affect the wavelength in a wave simulation include adjusting the frequency, amplitude, speed, or medium properties.

Each of these changes can have a specific effect on the wavelength of the wave. For example, increasing the frequency generally results in a shorter wavelength, while decreasing the frequency leads to a longer wavelength. Similarly, altering the amplitude may not directly affect the wavelength but can impact the intensity or energy of the wave.

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Alkenes are hydrocarbons that contain a double carbon bond, whereas alkanes are hydrocarbons that only have single carbon-carbon bonds.

The reason why alkenes are more reactive than alkanes is that the double bond has a very high electron density in comprarison to the single bond of the alkanes. This double bond is made up of one very strong σ bond and a weak π bond.

So generally alkenes react breaking the π bond.

To find the concentration of HCl, we need to calculate the moles of base added to neutralize the acid, the moles of acid originally in the beaker, and then use these values to determine the molarity of HCl.

a) To find the moles of base (NaOH) added, we can use the formula:

Moles of NaOH = Volume of NaOH (in L) × Molarity of NaOH

Converting the volume to liters and using the given values:

Moles of NaOH = 0.080 L × 2.5 mol/L = 0.2 mol

b) Since the reaction is a 1:1 stoichiometric ratio between NaOH and HCl, the moles of acid (HCl) will be equal to the moles of base added. Therefore, there were also 0.2 mol of HCl originally in the beaker.

c) Now, we can calculate the molarity of HCl using the formula:

Molarity (M) = Moles of solute / Volume of solution (in L)

Given that the volume of the acid is 100.0 mL (or 0.100 L) and the moles of acid is 0.2 mol:

Molarity of HCl = 0.2 mol / 0.100 L = 2.0 M

Therefore, the molarity of the HCl solution is 2.0 M.

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Answer:to help understand the stuff more

Explanation:

The amount of heat energy lost by the 100 mL of water when it all freezes is 33400 J

Mass = Density ×Volume

Mass of water = 1 × 100

Mass of water = 100 g

Q = m × ΔHf

Q = 100 × 334

Q = 33400 J

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Answer:

capacity means an amount that something can contain

Answer: Approximate radius of an iron atom ≈ 5.77 × 10^-15m or 0.0577 nm

(a) Impact parameter refers to the perpendicular distance between the path of an incident particle and the center of the target.

Let’s compute the impact parameter using the formula below:

b = cot(θ/2) * (R1 + R2),

where θ = scattering

angle = 95°,

R1 = radius of incident particle,

R2 = radius of target particle

R1 = r, radius of alpha particle

R2 = R, radius of iron atom

R = 1.2 × 10^-10mb = cot(θ/2) * (R1 + R2)

b = cot(95°/2) * (1.2 × 10^-10m + 8.5 × 10^-15m)

b = 3.556 × 10^-15m ≈ 4 μm

Answer: Impact parameter = 4 μm

(b) Scattering occurs when the impact parameter is less than the distance of closest approach (DCA).

Therefore, we need to compute DCA using the formula below:

DCA = 2R(R1 + R2) / (R + R1)sin²(θ/2)

DCA = 2(1.2 × 10^-10m)(17 × 10^-6m + 1.2 × 10^-10m) / (8.5 × 10^-15m + 1.2 × 10^-10m)sin²(95°/2)

DCA = 3.28 × 10^-13m

To determine the fraction of particles scattered at angles greater than 95°,

we need to compute the area of the ring centered at the point of closest approach, but outside of the minimum scattering angle.

The area of this ring is πb² (1 - cos(θ/2)).

Also, the total area of scattering is πDCA² / 4.

Therefore, the fraction of particles scattered at angles greater than 95° is:Fraction = πb² (1 - cos(θ/2)) / πDCA² / 4

Fraction = (4b² / DCA²) (1 - cos(θ/2))

Fraction = (4(4 × 10^-12m²) / (3.28 × 10^-13m)²) (1 - cos(95°/2)) ≈ 0.038

Answer: Fraction of particles scattered at angles greater than 95° ≈ 0.038

(c) To compute the approximate radius of an iron atom, we need to use the formula for the radius of the nucleus of an atom. The Rutherford scattering formula, which is based on Coulomb's law, was used to determine the size of the nucleus of the atom.

Rutherford's formula states that the radius of the nucleus is R = R0A¹/³,

where

A is the mass number of the nucleus,

R0 is the radius of the nucleus of hydrogen (which is about 1.2 × 10^-15m), and

R is the radius of the nucleus of the atom.

Therefore, we need to determine the mass number of iron. The mass number of an atom is equal to the number of protons (atomic number) plus the number of neutrons. The atomic number of iron is 26, and the atomic mass is 56. Thus, the mass number is 56.

R = R0A¹/³R = (1.2 × 10^-15m)(56)¹/³ ≈ 5.77 × 10^-15m

Answer: Approximate radius of an iron atom ≈ 5.77 × 10^-15m or 0.0577 nm

Answer:

0.162 mol

Explanation:

n=m/M

M= 20*3 + 15*2 + 8*4*2

M=154 g/mol

n=25g/154g/mol

n=0.162 mol

The number of moles in 25 grams of calcium phosphate is 0.162 mol.

Mole is a SI unit that is used to measure the quantity of any substance in a specific amount. To calculate the moles, we will divide the mass of the substance by the molar mass of that substance.

n = m/M

Calcium phosphate is a chemical compound that contains calcium and phosphorus or phosphoric acid, and it is used to treat the low calcium in the body and thyroid and parathyroid.

The molar mass of calcium sulfate is 154 g/mol

The mass of calcium sulfate is 25 grams

Putting the value in the equation

n = m/M

n = 25g / 154 g/mol = 0.162 mol

Thus, the moles of calcium sulfate are 0.162 mol.

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Answer:

Conduction

Explanation:

Conduction can be regarded as transfer of thermal energy which exist

between two or more objects that are in contact with each other. From the question, the spoon touches the hot liquid and heat is transferred to the spoon through conduction

Answer:

\(1.38 \times 10^{24}\)

Explanation:

The formula mass of magnesium chloride is 95.21 g/mol.

This means 219 grams is equal to \(\frac{219}{95.21}\) moles.

Multiplying this by Avogadro's number, there are \(\frac{219}{95.21}(6.02 \times 10^{23})=1.38 \times 10^{24}\) molecules.

The diagram shows the stages jamila uses to make zinc sulfate and the stages in the correct order include the following below:

This is referred to as a process used to separate solids from liquids or gases using a filter medium.

In the formation of zinc sulfate, the zinc is usually added to concentrated H₂SO₄ and filtered with the use of filter paper through several techniques to ensure that the filtrate is dry and concentrated.

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Answer:The light-independent reactions use the ATP and NADPH from the light-dependent reactions to reduce carbon dioxide and convert the energy to the chemical bond energy in carbohydrates such as glucose.

Explanation:step-by-step

Answer:

FALSE

Explanation:

I just took the test and put true and it was wrong so it's false. Hope this helps and please mark brainliest!

When using the liquid-based method for the collection of a specimen for a pap test, plastic fronded broom is used

The Pap test (or Pap smear) looks for pre cancers, cell changes on the cervix which may become cervical cancer if they are not treated appropriately. The HPV test looks for the virus (human papillomavirus) which will cause these cell changes.

If the results of your Pap test come back positive, meaning your doctor found abnormal or unusual cells on your cervix. It doesn't suggest you have cervical cancer. most frequently , the abnormal test result means there are cell changes caused by the human papilloma virus (HPV).

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Answer:

The SI system : The international system of units.

It is a scientific method of expressing the magnitudes or quantities of important natural phenomena.

Benefits of SI system

Answer:

I would tell him to open the tent in order to breathe frsh air.

Explanation:

Even if propane is not ignited, the buildup of the gas can be deadly due to inhalation. Breathing the gas can cause hypoxia, which is a form of oxygen deprivation that can lead to death. Hence you shouldnt use propane indoors.

Balanced Half reactions are:

Now at Anode reaction will occur as given:

2 \(F^-\) ==> F₂+ 2\(e^-\) + H₂O ==> \(FO^-\)+ 2\(H^+\) + \(F^-\)  

At Cathode:

2  \(H^+\)+  2\(e^-\) ==> H₂

Since the question states that you are using an aqueous solution of LiF,  so water and LiF both are present and both dissociate in ion as

LiF-----------> \(Li^+ + F^-\)

\(H_2O\)--------------> \(H^+ +OH^-\)

Now at Anode reaction will occur as given:

2 \(F^-\) ==> F₂+ 2\(e^-\) + H₂O ==> \(FO^-\)+ 2\(H^+\) + \(F^-\)  (will occur)

At Cathode:

2  \(H^+\)+  2\(e^-\) ==> H₂ (will occur)

At Cathode:

\(Li ^+\)  +  \(e^-\)   ==> Li(This reaction will not occur)

The deposition of solid Li will not occur because in aqueous solution,  \(H^+\)will be reduced before   \(Li ^+\) .

The reduction potentials for  \(H^+\) is zero whereas reduction potential for    \(Li ^+\)is -3.04 V.

The reduction potential of a species is its tendency to gain electrons and get reduced. It is measured in millivolts or volts. Larger positive values of reduction potential are indicative of a greater tendency to get reduced.

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Considering the definition of complete combustion, the chemical equation for the complete combustion of C₇H₁₆ is:

C₇H₁₆(l) + 11 O₂(g) → 7 CO₂(g) + 8 H₂O(g)

Combustion is a chemical process through which heat is obtained. To achieve this, oxidation reactions are generated that allow the objective to be reached. It is necessary to have several elements:

Complete combustions are those reactions in which the combustible material is completely oxidized (consumed) and other oxygenated compounds are produced, such as carbon dioxide (CO₂) or sulfur dioxide (SO₂), as the case may be, and water (H₂O).

In other words, complete combustion is the result of the complete oxidation of the fuel but not the disappearance of the oxidizer, that is, the oxidation of all the fuel occurs. For this it is necessary that the necessary quantities of oxidizer and dry air intervene. All complete combustion releases, as a product of the reaction, carbon dioxide (CO₂) and water in the vapor state (H₂O).

Considering the definition of complete combustion, you get:

C₇H₁₆(l) + 11 O₂(g) → 7 CO₂(g) + 8 H₂O(g)

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The right answer is given in the picture.

To find the formula of an ionic compound, first, identify the cation and write down its symbol and charge. Then identify the anion and note its sign and charge. Finally, the two ions combine to form an electrically neutral compound.

Particle diagram Elements and compounds can be represented using particle diagrams. This is a box with colored spheres drawn to represent atoms or molecules. These diagrams can represent elements and compounds and their molecular composition by the types of spheres and how they are connected. Particle diagrams are used to show particles, atoms, or molecules within matter. A diagram showing particles in a substance.

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The amount of carbon flux in the atmosphere will be 3.3 GtC/yr

The carbon flux in the atmosphere can be calculated by:

1. Removing the amount of carbon that leaves the atmosphere from the amount that enters the atmosphere.

2. Adding the amount of carbon released by fossil fuel burning.

Thus,

Carbon flux = 211.6 - 213.8 + 5.5 = 3.3 GtC/yr

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Answer:

The  temperature of the water will reduce by 2.4 °C from 24.9 °C 22.5 °C.

The temperature change when 3.21 g of NH₄NO₃ is dissolved in 100 g of water under the same conditions is determined using the formula:

In example 5.6, when 3.21 g of NH₄NO₃ is dissolved in 50 g of water at 24.9°C in a calorimeter, the temperature decreases to 20.3°C.

The quantity of heat absorbed, q = -mcΔT

m = 50 + 3.21 = 53.21g

Assuming the specific heat of the solution is the same as that of water;

c = 4.18 J/g/K

ΔT = 20.3 - 24.9 = -4.6 K

q = -(53.21 * 4.18 * -4.6)

q = 1023.12 J

Since, the same mass of NH₄NO₃ is dissolved, the quantity of heat absorbed is the same.

ΔT = - q/mc

m = 100 + 3.21 = 103.21 g

ΔT = - 1023.12 J/103.21 * 4.18

ΔT = -2.4 °C

Therefore, the temperature of the water will reduce by 2.4 °C.

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A calcium-selective electrode typically uses a glass membrane. A calcium-selective electrode is a type of ion-selective electrode (ISE) that is used to measure the concentration of calcium ions in a solution.

The electrode consists of a membrane that is selective to calcium ions and a reference electrode. The membrane is designed to only allow calcium ions to pass through while blocking other ions. This allows the electrode to selectively measure the concentration of calcium ions in a solution. The type of membrane used in a calcium-selective electrode is usually made of glass or liquid. Glass membranes are commonly used because they are highly selective and stable, providing accurate and reliable measurements. Liquid membranes, on the other hand, are less stable but are more flexible and can be customized to suit specific applications. The membrane of a calcium-selective electrode contains a calcium-sensitive ionophore, which is a chemical that binds to calcium ions and generates a measurable electrical signal.

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Answer:

C

Explanation:

Got it right on a test

Answer:

atoms relative motion slow down and begin to vibrate in place

The moisture content is determined as follows, (weight of the container with wet soil minus weight of the container with dry soil) divided by (weight of the container with dry soil minus weight of the container), then multiplied by 100 to express as a percentage.

The complete question is,

How is water absorption calculated?

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The various steps of how to prepare a specific volume of a dilute solution from a concentrated stock solution is described below.

A stock solution is the solution that contains the standard concentration of a chemical compound.

A diluted solution is the solution shoes concentration has been decrease through addition of a solvent like water.

To prepare a dilute solution from a stock solution the following is done:

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When methane undergoes combustion the carbon dioxide (CO₂) and water (H₂O) is formed. Therefore, option C is correct.

A chemical reaction between two or more substances, usually involving oxygen, that produces heat and light in the form of a flame is called as combustion. The reaction is as follows:

CH4(g) + 2O₂(g) → CO₂(g) + 2H₂O

Methane burns in the presence of enough oxygen to produce carbon dioxide (CO₂) and water (H₂O). When it is burned, it produces a large amount of heat, making it an excellent fuel source.

Thus, option C is correct.

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Rusting is an electrochemical reaction. Iron rusts faster when alloyed with cobalt than when alloyed with manganese because, in the iron-manganese alloy, manganese is rendered the anode and iron is rendered the cathode

An alloy is a combination of two metals. There are various reasons for producing alloys such as greater tensile strength, corrosion resistance and improved aesthetic appearance.

When iron is alloyed with cobalt, the iron rusts faster than pure iron because iron is rendered the anode and cobalt is rendered the cathode. When the iron is alloyed with manganese, it rusts more slowly than pure iron because in the iron-manganese alloy, manganese is rendered the anode and iron is rendered the cathode.

Missing parts;

An iron object alloyed with cobalt rusts more quickly than a pure iron object. However, an iron object alloyed with manganese rusts less quickly than a pure iron object under the same conditions. This is true because

(1) cobalt is a stronger reducing agent than iron

(2) iron is a stronger reducing agent than manganese

(3) cobalt exhibits more metallic character than either iron or manganese

(4) in the iron-manganese alloy, manganese is rendered the anode and iron is rendered the cathode

(5) in the iron-cobalt alloy, cobalt is rendered the anode and iron is rendered the cathode

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