4. What is the frequency of light that has a wavelength of 4.25 x 10^-8 m?

Answer:

Together, the number of protons and the number of neutrons determine an element's mass number: mass number = protons + neutrons.

Explanation:

Look at the atomic mass of the atom and you subtract the amount of protons from it.

For instance, assuming that you have a carbon-11 molecule, you can see that the nuclear weight is roughly 11, and you deduct how much protons in it. There are 6 protons in a carbon molecule so you deduct 6 from 11, which gives you 5.

That implies that you have 5 neutrons in that particle. The equivalent goes for particles. In the event that you have a particle, you would in any case deduct 6 from 11 and you would in any case get 5 neutrons.

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Explanation:

Hello mr/mrs (name) I unfortunately couldn't pay attention to the class due to some issues I had therefore I don't know what we are doing in class

OR

Hello mr/mrs (name) I could understand what we were doing in class I would like it if you could break it down more or explain better to me

OR just say something it had something to do with your internet such as

Hello mr/mrs (name) I didn't understand what you were saying during our class due to some of my internet issues I was have throughout the day. I hope you can explain what we did during the class.

Those may be some of my excuses I've used before

they have worked for me:)

I don't know if that helped?:/

Answer:

kylee is the best

Explanation:

Answer:

A spatial pattern is a perceptual structure, placement, or arrangement of objects on Earth. It also includes the space in between those objects. Patterns may be recognized because of their arrangement; maybe in a line or by a clustering of points.

Explanation:

Explanation:

We have a 63.9 g sample of calcium hydroxide. First we have to convert those grams into moles. To do that we have to use the molar mass of calcium hydroxide.

Calcium hydroxide = Ca(OH)₂

molar mass of Ca = 40.08 g/mol

molar mass of O = 16.00 g/mol

molar mass of H = 1.01 g/mol

molar mass of Ca(OH)₂ = 1 * 40.08 g/mol + 2 * 16.00 g/mol + 2 * 1.01 g/mol

molar mass of Ca(OH)₂ = 74.10 g/mol

mass of Ca(OH)₂ = 63.9 g

moles of Ca(OH)₂ = 63.9 g /(74.10 g/mol)

moles of Ca(OH)₂ = 0.862 moles

In 1 molecule of Ca we have 2 atoms of O. So in 1 mol of Ca(OH)₂ we will have 2 moles of O atoms.

1 mol of Ca(OH)₂ = 2 moles of O atoms

moles of O atoms = 0.862 moles of Ca(OH)₂ * 2 moles of O /1 mol of Ca(OH)₂

moles of O atoms = 1.724 moles

One mol is similar to a dozen. When we say that we need a dozen eggs we know that we need 12 eggs. If we want a mol of eggs, we want 6.022*10^23 eggs. So one mol of something is 6.022 * 10^23 of that.

1 mol of O atoms = 6.022 * 10^23 atoms

n° of O atoms = 1.724 moles * 6.022 * 10^23 atoms/1 mol

n° of O atoms = 1.04 * 10^24 atoms

Answer: In a 63.9 g sample of Ca(OH)₂ we have 1.04 *10^24 atoms of oxygen.

Aqueous potassium permanganate that has been diluted with carbon tetrachloride with bromine. Pentane and 1-pentane are distinguished by reagents.

An unsaturation test can be performed using the bromine in carbon tetrachloride solution. Use 100 ml of carbon tetrachloride and bromine to evaluate the unsaturation of a compound when it is insoluble in water. The bromine water turns gray as a result of how the bromine reacts with an alkene's carbon-carbon double bonds. With the help of bromine, an alkene is transformed into an alkane by breaking the carbon-carbon bond.

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The approximate probability of finding Elecpatra in the mid-region between x = 3L/8 and x = 5L/8 is 0.250.

To calculate the probability of finding Elecpatra in the mid-region between x = 3L/8 and x = 5L/8, we need to determine the probability amplitude associated with that region.

The probability amplitude can be found by examining the wave function of Elecpatra in the 4th excited state of the 1D infinite well.

In the 1D infinite well, the wave function for the nth excited state can be expressed as:

ψ(x) = sqrt(2/L) * sin((n * π * x) / L)

Since Elecpatra is in the 4th excited state, n = 4. We can now substitute the values into the wave function:

ψ(x) = sqrt(2/L) * sin((4 * π * x) / L)

To find the probability amplitude for the mid-region between x = 3L/8 and x = 5L/8, we integrate the absolute square of the wave function over that region. The probability amplitude is the square root of the result.

P = Integral [3L/8 to 5L/8] |ψ(x)|^2 dx)

Calculating the integral and simplifying the expression, we find:

P = sqrt(2/π)

Approximating π as 3.14, we can evaluate the expression:

P ≈ sqrt(2/3.14)

P ≈ 0.250

Therefore, the approximate probability of finding Elecpatra in the mid-region between x = 3L/8 and x = 5L/8 is 0.250.

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Answer:

0.5 mole

Explanation:

C=12u

O=16u

1 mole carbon dioxide=44 grams

so 22grams = 0.5 mole

Answer:

The pressure exerted by a gas is due to the random motion of particles in the gas. Gases have weak intermolecular forces and the particles are in continuous random motion and these particles collide with the walls of the container. These collisions with the walls of the container exert pressure on the gas.

Explanation: Hope this helps!!

The ranking goes from the most reduced iodine \((I^2\)) with an oxidation state of 0 to the most oxidized iodine \((HIO2)\) with an oxidation state of +5.

To rank the following compounds in order from most reduced to most oxidized iodine, let's examine the oxidation states of iodine in each compound:

Based on the oxidation states, we can now rank the compounds:

Most reduced: I^2 (oxidation state of 0) <\(I3^\)- (oxidation state of -1) <\(IO^\)- (oxidation state of -1) <\(HIO2\) (oxidation state of +5) : Most oxidized

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Answer:

pH is a scale used to specify the acidity or basicity of an aqueous solution. Lower values correspond to solutions which are more acidic in nature, while higher values correspond to solutions which are more basic or alkaline.

Explanation:

Answer: “pH, quantitative measure of the acidity or basicity of aqueous or other liquid solutions. The term, widely used in chemistry, biology, and agronomy, translates the values of the concentration of the hydrogen ion—which ordinarily ranges between about 1 and 10−14 gram-equivalents per litre—into numbers between 0 and 14.” - my science teacher I don’t know where she gets her notes from

Explanation:

The molar concentration of a 12% sodium chloride solution is approximately 2.05 M.

To determine the molar concentration of a 12% sodium chloride solution, we need to convert the given percentage concentration into molarity.

First, we need to understand that the percentage concentration refers to the mass of the solute (sodium chloride) relative to the total mass of the solution.

In this case, a 12% sodium chloride solution means that there are 12 grams of sodium chloride in 100 grams of the solution.

To convert this into molar concentration, we need to consider the molar mass of sodium chloride, which is 58.5 g/mol.

We can start by calculating the number of moles of sodium chloride in 12 grams:

Moles of sodium chloride = mass of sodium chloride / molar mass of sodium chloride

Moles of sodium chloride = 12 g / 58.5 g/mol = 0.205 moles

Next, we calculate the volume of the solution in liters using the density of the solution. Since the density is not provided, we assume a density of 1 g/mL for simplicity:

Volume of solution = mass of solution / density

Volume of solution = 100 g / 1 g/mL = 100 mL = 0.1 L

Finally, we calculate the molar concentration (Molarity) by dividing the number of moles by the volume in liters:

Molar concentration = moles of solute / volume of solution

Molar concentration = 0.205 moles / 0.1 L = 2.05 M

Therefore, the molar concentration of a 12% sodium chloride solution is approximately 2.05 M.


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Cytochrome c is an iron-containing enzyme found in the cells of all aerobic organisms and If cytochrome c is 0.43% by mass, then  its minimum molecular weight  is 13023.2 g .

Cytochromes are the main electron carries present in the electron transport chain . Minerals associated with cytochromes are Fe and Cu .

Calculation ,

100 g of enzyme contains 0.43 g Fe

X g of enzyme will contains 56 g of Fe

∴ 0.43 × X = 5600

X =  5600 / 0.43 = 13023.2 g or 13 kg/mol

Therefore , the minimum molecular weight of the enzyme is 13023.2 g or 13 kg/mol .

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the type of central-atom orbital hybridization corresponds to each electron-group arrangement:

trigonal planar

What is trigonal planar molecular geometry?

A trigonal planar molecular geometry model has one atom in the centre and three atoms at the corners of an equilateral triangle, known as peripheral atoms, all in the same plane.

All three ligands in an ideal trigonal planar species are identical, and all bond angles are 120°. Molecules with three ligands which are non-identical deviate from this idealised geometry.

The trigonal planar molecular geometry has 0 lone pairs. When there are 1 lone pair and 2 bond pairs present, the molecular geometry becomes bent or angular, whereas the electron geometry remains the same – trigonal planar.

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The balanced half-reactions are given below:

A. Mo³⁺ (aq) + 3e⁻ → Mo(s)

B. H₂SO₃ (aq) +  H₂O → SO₄⁻ (aq) + 4 H⁺ + e⁻

C. NO₃⁻ (aq) + 4 H⁺ + 2e⁻ → NO (g) + 2 H₂O

D. O₂ (g) + 4H⁺ +  4 e⁻ → 2 H₂O (l)

Half-reactions refers to either of the two reactions in a redox reaction.

A redox reaction is a reaction in which oxidation and reduction occur simultaneously and to the same extent.

Oxidation reaction involves a loss of electrons while reduction reaction involves a gain of electrons.

The balanced half-reactions are given below:

A. Mo³⁺ (aq) → Mo(s) ( in acidic solution)

This is a reduction reaction:

Mo³⁺ (aq) + 3e⁻ → Mo(s)

B. H₂SO₃ (aq) → SO₄⁻ (aq) (acidic solution)

This is an oxidation reaction

H₂SO₃ (aq) +  H₂O → SO₄⁻ (aq) + 4 H⁺ + e⁻

C. NO₃⁻ (aq) → NO (g) (acidic solution)

This is a reduction reaction

NO₃⁻ (aq) + 4 H⁺ + 2e⁻ → NO (g) + 2 H₂O

D. O₂ (g) → H₂O (l) (acidic solution

This is a reduction reaction

O₂ (g) + 4H⁺ +  4 e⁻ → 2 H₂O (l)

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Answer:

Miscible

Explanation:

Mixed completely

Answer:

The answer is nonpoint source pollution

Answer: What best describes the reaction is "A single replacement reaction takes place because zinc is more reactive than hydrogen."

In Experiment 2, the gas produced at the negative electrode is typically hydrogen (H2).

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The balanced redox reaction in basic solution is: \(CIO(aq) + CO_2(aq) + OH^{-(aq)} \rightarrow CIO_2(g) + CO_2(g) + H_2O(l)\)

To balance this redox reaction in basic solution, we first need to identify the oxidation state of each element in the equation. We see that the oxidation state of chlorine changes from +1 to +4, while the oxidation state of carbon changes from +4 to +2.

Next, we balance the equation in acidic solution, as we normally would, and then add OH⁻ to both sides of the equation to neutralize the H⁺ ions and form water molecules. This adds an equal number of H⁺ and OH⁻ ions to both sides of the equation, so the charge balance is maintained.

After balancing the equation in basic solution, we make sure that the number of atoms of each element is the same on both sides, and that the charges are balanced. Finally, we add the phases of each species to complete the equation.

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Answer:

2.3 / yes

Explanation:

edg 2020

Answer: 2.3 and yes

Explanation:

Lei's alcohol consumption can lead to a deficiency in various B vitamins, but one vitamin that may be of particular concern is thiamin or vitamin B1.

Alcohol interferes with the body's ability to absorb and utilize thiamin, which is an essential nutrient required for the proper functioning of the nervous system, muscles, and heart. Chronic alcohol consumption can lead to a thiamin deficiency and a condition called Wernicke-Korsakoff syndrome, which can cause confusion, memory loss, and vision problems.

Moreover, alcohol consumption can also lead to deficiencies in other B vitamins such as riboflavin, niacin, and pantothenic acid, as these vitamins are also essential for energy metabolism and the proper functioning of the nervous system. Therefore, individuals who consume alcohol regularly should ensure they consume a balanced diet and consider taking a B-complex vitamin supplement to help prevent deficiencies.

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Answer:

Lower fuel efficiency than Conventional Diesel

Pros of Biodiesel Cons of Biodiesel

Renewable May damage fuel filters and pipes

Incredibly Safe Can Effect Food Supply

Ready to Use Little bit Expensive

Extends engine lifespan Lower fuel Efficiency than DieselHydrogen Fuel Cell Advantages and Disadvantages in Material...

Hydrogen Fuel Cell Technology.

Advantage: High Energy Density Improves Productivity.

Disadvantage: The Use of Fossil Fuels in Hydrogen Production.

Disadvantage: Hydrogen Storage and Transportation.

Disadvantage: Fuel Cell Efficiency.Ethanol Fuel is Cost-effective Compared to Other Biofuels. ...

Ecologically Effective. ...

Helps Reduce Global warming. ...

Easily Accessible. ...

Minimizes Dependence on Fossil Fuels. ...

Contributes to Creation of Employment to the Country. ...

Opens up Untapped Agricultural Sector. ...

Ethanol Fuel is a Source of Hydrogen.draw a table to compare the advantages and disadvantages of three feels _ ethanol,hydrogen hope it's right

Answer:

All these conversion factors are equal to 1. If it doesn't seem obvious at first, think about it for a second. Realize that 1 minute is equivalent to 60 seconds. Simply replace 1 minute in the fraction with its equivalent 60 seconds and it becomes clear that 60 seconds / 60 seconds = 1. Numerator and denominator are equivalent; they are just expressed differently.

Explanation:

The initial unit cancels out and goes into the new unit

In science, we often need to convert from one unit to another to ensure accuracy of our calculations.

Let's say i want to convert 500 minutes to seconds.

The conversion factor is as follows;

60 seconds make 1 minute

x seconds make 500 minutes

x = 60 seconds * 500 minutes/1 minute

x = 30,000 seconds

Hence the initial unit which is "minutes" is canceled  out and the new unit "seconds" remains.

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Answer:

Lichens can be used as air pollution indicators, especially of the concentration of sulphur dioxide in the atmosphere. Lichens are organisms that grow in exposed places such as rocks or tree bark. They need to be very efficient at absorbing water and nutrients to grow there.

Answer:

1

Explanation:

Octet meaning 8. So if chlorine already has 7 valence electrons it will only need to get 1 more to be satisfied.

The mass of potassium chlorate is 0.3439 to generate 114.0 L  \(O_{2}\) at 0.720 atm and 291K

The decomposition of potassium chlorate is represented as

\(2KClO_{3} (s) - > 2KCl(s) + 3O_{2} (g)\)

Given, Volume = 114.0 L

pressure = 0.720 atm

temperature = 291 K

According to the Ideal gas Equation

Pv = nRT

\(n=\frac{Pv}{RT}\)

\(n=\frac{0.720*114.0}{0.82*291}\)

n= 0.3439

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Answer:

5700 milligrams

Explanation:

To go to a smaller unit you move the decimal to the right.