Find the change in wavelength for photons scattered through 180 degrees by free photons. Compare with the corresponding shift for electrons.

Explanation:

CH4 + 4S ---> CS2 + 2H2S

4) 0.75 mol S × (1 mol CS2/4 mol S) = 0.19 mol CS2

5) 3 mol H2S × (1 mol CH4/2 mol H2S) = 1.5 mol CH4

Fe2O3 + 2Al ---> 2Fe + Al2O3

6) 25 g FeO3 × (1 mol Fe2O3/159.69 g Fe2O3) = 0.16 mol Fe2O3

0.16 mol Fe2O3 × (2 mol Al/1 mol Fe2O3) = 0.32 mol Al

0.32 mol Al × (26.98 g Al/1 mol Al) = 8.6 g Al

7) Given:

45 g Al × (1 mol Al/26.98 g Al) = 1.6 mol Al

85 g Fe2O3 ×(1 mol Fe2O3/159.69 g Fe2O3)

= 0.53 mol Fe2O3

Let's look at how much Fe each reactant will produce:

1.6 mol Al × (2 mol Fe/2 mol Al) = 1.6 mol Fe

0.53 mol Fe2O3 × (2 mol Fe/1 mol Fe2O3) = 1.1 mol Fe

Note that the given amount of Fe2O3 will give us fewer Fe. Therefore, Fe2O3 is the limiting reactant.

8) Al will produce 1.6 mol Fe × (55.845 g Fe/1 mol Fe)

= 89 g Fe

Fe2O3 will produce 1.1 mol Fe × (55.845 Fr/1 mol Fe)

= 61 g Fe

9) Since Fe2O3 is the limiting reactant, the ideal yield of Fe for the reaction is 61 g. If the actual reaction only gave us 25 g Fe. then the percent yield of Fe is

%yield = (25 g Fe/61 g Fe) × 100% = 41%

10) If we only got 25 g Fe, then the amount of Al actually used in the reaction is

25 g Fe × (1 mol Fe/55.845 g Fe) = 0.45 mol Fe

0.45 mol Fe × (2 mol Al/2 mol Fe) = 0.45 mol Al

0.45 mol Al × (26.98 g Al/1 mol Al) = 12 g

Therefore, the leftover amount of Al is

25 g Al - 12 g Al = 13 g Al

Answer:

The pricing strategy is an important element in setting up the selling price of a product.

Explanation:

The pricing strategy is an important consideration while fixing up the selling price of product manufactured. When setting up a selling price of a product, the companies set up product calculation. Businesses should decide the pricing strategy before they advertise the products to the customers.  

There are mainly 5 benefits to the businesses while doing a product calculation. They are:

--- Doing competition based pricing enables the company to compete with the rival companies product and is based on the market based study. Competition pricing is a useful tool for the retailers as well as the small businesses.

---  Doing a cost plus pricing helps the total cost of making the product and also an add up in the market in order to determine the pricing of the product.

--- Dynamic pricing :

    Dynamic pricing is a non static pricing. Dynamic pricing is an efficient method for the market based on the supply and demand.

--- Penetration pricing :

 Penetration pricing is used by the large companies which is used to capture the market share by the setting product prices at the below market level so as to gain customers.

--- Doing a research for the price skimming helps the company to set up the accurate price for the product rather than readjusting the prices of the product later on based on the demand and the supply.

To convert an aldehyde to a carboxylic acid, oxidation of the aldehyde functional group is required.

There are several reagents that can be used for this conversion:

1. Strong Oxidizing Agents:

  - Potassium permanganate (KMnO4): In the presence of acidic conditions, KMnO4 can oxidize aldehydes to carboxylic acids.

  - Chromic acid (H2CrO4): It is a strong oxidizing agent that can convert aldehydes to carboxylic acids.

2. Tollens' Reagent:

  Tollens' reagent, also known as silver mirror reagent, is a solution of silver nitrate (AgNO3) and ammonia (NH3) in water. It can oxidize aldehydes to carboxylic acids under mild conditions. It produces a silver mirror on the inner surface of the reaction vessel.

3. Jones Reagent:

  Jones reagent consists of a solution of chromium trioxide (CrO3) in diluted sulfuric acid (H2SO4). It is a strong oxidizing agent that can convert aldehydes to carboxylic acids.

These are some commonly used reagents to convert aldehydes to carboxylic acids through oxidation. The choice of reagent may depend on factors such as reaction conditions, desired selectivity, and other functional groups present in the molecule.

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Answer:

This deficiency of iodine in the diet can be addressed by fortification of salt i.e. adding iodine to salt. Salt has been identified as an effective vehicle for iodine because it is consumed almost daily and universall

Explanation:

hope you understand

Answer:

in an ionic bond, atoms lose valence electrons and become positively charged

Explanation:

To clarify, the atom that loses the electrons becomes a positively charged ion (cation), and the atom that gains them becomes a negatively charged ion (anion).

Energy as the ability to do work.

What is energy?

Energy has been defined as the ability to do work. Modern civilization is possible because people have learned how to change energy from one form to another and then use it to do work. People use energy to walk and for bicycle, to move cars along roads and boats through water, to cook food on stoves, to light our homes and offices, to manufacture products.

There are different forms of energy, which may include:

These forms of energy can be grouped into two general types;

Explanations

1. This is called convection.

2. You are using chemical energy and converting it to thermal (heat) energy.

3. Kinetic energy is the important factor

4. A hydrocarbon is an organic compound consisting entirely of hydrogen and carbon. Hydrocarbons are generally colourless and hydrophobic, and their odors are usually weak or exemplified by the odors of gasoline. Examples of hydrocarbons are coal, petroleum, natural gas and tar. They are used as energy sources.

5. Radioactive waste. These materials can remain radioactive and dangerous to human health for thousands of years.

6. Mercury.

7. The energy of the sun is the original source of most energy used on Earth.

8. Heat is released and this heat expended allows work to be done.

9.

10.

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Answer:

D. Provides higher resolution images

Explanation:

The advantages gained by the use of digital data transmission instead of analog transmission are;

1) Noise do not damage digital signal transmission but they impact on analog signals. Digital signals are therefore more secure than analog signals

2) The bandwidth required for digital signal transmission is much less than the bandwidth required for analog

3) Digital signal allow data transmission to very long distance

4) The rate of transmission with digital signals is higher with digital signals

5) Digital signals allow easy and cost effective methods by which they are  replicated

The resolution of an image is a measure of the amount of pixels displayed per inch of the image, such that a high resolution image has more pixel per inch of the image. It is therefore a factor determined at the source of the image based on how much detail is required in an image before transmission

Explanation:

We are given: Ka = 4.83*10^-8

We use Ka to find pKa:

We know: pKa + pKb = 14

Answer:

pKb = 6.68

Answer:

A. They both arranged the elements in order of increasing atomic mass.

Explanation:

Hope this helps! :)

The work of Newlands similar to that of Mendeleev on the periodic table was that they both arranged the elements in order of increasing atomic mass.

Hence, Option (A) is correct answer.

Newland's Law of Octaves states that if the chemical elements are arranged in increasing order of atomic mass, every eighth element's properties are similar to that of the first element.  

Mendeleev's Periodic Law states that the chemical and physical properties of elements are a periodic function of their atomic masses.

Now, lets check all options one by one

Option (A): They both arranged the elements in order of increasing atomic mass.

Mendeleev arranged the elements in rows and column of a table in order of their increasing atomic mass. Newland arranged the elements in order of their increasing atomic mass that every eighth element's properties are similar to that of the first element.  

So, it is correct option.

Option (B): They both arranged elements that had similar properties into groups.

Newlands arranged the elements that every eighth element's properties are similar to that of the first element. Mendeleev arranged the elements with similar properties in vertical column (group).

So, it is incorrect option.

Option (C): They both predicted the positions of undiscovered elements on the table.  

Only Mendeleev predicted the position of undiscovered elements that is  Gallium (eka-Aluminium) and Scandium (eka-Boron).

So, it is incorrect option.

Option (D): They both placed the relative atomic mass of each element on the table.

Only Mendeleev placed the relative atomic mass of each element on the table.

So, it is incorrect option.

Thus, we can say that The work of Newlands similar to that of Mendeleev on the periodic table was that they both arranged the elements in order of increasing atomic mass.

Hence, Option (A) is correct answer.

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The mass fraction of the pro eutectoid phase is approximately 0, and of the pearlite phase is approximately 1.

In iron-carbon alloy with 0.60 wt% carbon, the pro eutectoid phase is cementite (Fe₃C). To calculate the mass fractions of the pro eutectoid phase and the pearlite phase,  consider the eutectoid reaction.

Eutectoid reactions in iron-carbon alloys are usually found at a composition of approximately 0.76 wt% carbon. As the alloy in question contains 0.60 wt% carbon it is hypo-eutectoid (i.e., below the eutectoid composition).

The lever rule will be used to calculate this equation  as follows:

f₁ = \(\frac{C_{0} - C_{e} }{C_{1} - C_{e} }\)

where the values represent here :

f₁ = mass fraction of the pro eutectoid phase (cementite),

Cₒ =carbon content in the alloy (0.60 wt%),

Cₑ =eutectoid composition (0.76 wt%),

C₁ = carbon content in the cementite phase (6.70 wt% carbon).

After substituting the given values into the equation:

f₁ = \(\frac{0.60 - 0.76}{6.70 - 0.76} \\\)

f₁ = \(\frac{0.16}{5.94}\)

f₁ ≈ -0.027

Here the negative value of f₁ shows that there is no pro eutectoid phase present in the alloy. Rather, the entire alloy consists of the pearlite phase.

Hence ,  the mass fraction of the pro-eutectoid phase is approximately 0, and the mass fraction of the pearlite phase is approximately 1.

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Answer:

230 90Th

Explanation:

A careful observation of the equation given in question shows that 234 92U is undergoing alpha decay. This means that the resulting daughter nuclei will have a decrease of 4 in the mass number and a decrease of 2 in the atomic number.

Please see attached photo for further details.

Considering the definition of empirical and molecular formula, the empirical formula is C₃H₅O₂ and the molecular formula is C₆H₁₀O₄.

The empirical formula or minimal formula is one that indicates the type of atoms that make up a compound, the minimum ratio of the integer number of atoms and not necessarily the exact number of atoms in it.

The molecular formula is the actual formula of the molecule and indicates the types of atoms and the number of each type involved in the formation of the molecule.

This formula can be obtained from the empirical or minimal formula, as long as the molecular mass of the compound is known. That is, divide the estimated molecular mass divided by the molecular mass of the empirical form. With the multiple obtained, we proceed to multiply the subscripts of the empirical formula, thus obtaining the molecular formula of the compound.

In this case, you know:

Assuming a 100 grams sample, the percentages match the grams in the sample. So you have:

Then it is possible to calculate the number of moles of each atom in the molecule, taking into account the corresponding molar mass:

The empirical formula must be expressed using whole number relationships, for this the numbers of moles are divided by the smallest result of those obtained. In this case:

The empirical formula must be expressed using whole number relationships, so:

Therefore the C: H: O mole ratio is 3: 5: 2

Finally, the empirical formula is C₃H₅O₂.

The molar mass of adipic acid is 146.1 g/mol and the molar mass of empirical formula is 69 g/mole.

Dividing the estimated molecular mass divided by the molecular mass of the empirical form, you get:

146.1 g/mol÷ 69 g/mol ≅ 2

This means that in the molecular formula there are 2 unit formulas, so it is necessary to multiply the number of all atoms by 2:

Molecular formula= 2×C₃H₅O₂

Molecular formula= C₆H₁₀O₄

The molecular formula is C₆H₁₀O₄.

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The concentration of iron(iii) chloride contaminant in the original groundwater sample is (C1 × V1 / V) × 162.2 g/mol.

Given that the chemist adds m silver nitrate solution to the sample until silver chloride stops forming. He then washes, dries, and weighs the precipitate. He finds he has collected of silver chloride. Let us calculate the concentration of iron(iii) chloride contaminant in the original groundwater sample.Calculating the concentration of iron(iii) chloride contaminant in the original groundwater sample

Here is the given information;

Mass of silver chloride precipitate = m grams

Volume of groundwater sample taken = V ml

Volume of AgNO3 solution used = V1 ml

Concentration of AgNO3 solution = C1

Molar Mass of AgCl precipitated = 143.5 g/mol

The molarity of AgNO3 solution is given as;

Molarity of AgNO3 = Number of equivalents / Volume of solution in liters

We know that 1 mole of AgNO3 gives 1 mole of AgCl, i.e., AgNO3 is equivalent to AgCl.Therefore, the number of equivalents of AgNO3 is the same as the number of equivalents of AgCl.

Number of equivalents of AgNO3 = C1 × V1

Number of equivalents of AgCl = m / 143.5 g/mol

Concentration of FeCl3 = (Number of equivalents of FeCl3 / Volume of sample in liters) × Molar mass of FeCl3

Number of equivalents of FeCl3 = Number of equivalents of AgNO3

Number of equivalents of FeCl3 = C1 × V1

Concentration of FeCl3 = (C1 × V1 / V) × Molar mass of FeCl3

Concentration of FeCl3 = (C1 × V1 / V) × 162.2 g/mol

Hence, the concentration of iron(iii) chloride contaminant in the original groundwater sample is (C1 × V1 / V) × 162.2 g/mol.

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The molecule that contains 6 atoms comprising a single functional group is Hexanol, under the condition that the given molecule is that of an alcohol.

Its molecules contain 6 carbon atoms. The finishing -ol states an alcohol (the OH functional group), and the hex- stem presents  that there are six carbon atoms in the LCC. The OH group is assembled to the second carbon atom.
Functional groups are considered as specified groups of atoms within molecules that are the reason for characteristic chemical reactions of those molecules . Some examples of functional groups include alcohols, aldehydes, ketones, carboxylic acids, esters, ethers, halogens, amines and amides.
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The complete question
Name a molecule that contains 6 carbon atoms with a single functional group that is an alcohol

Answer:

\(\boxed {\boxed {\sf \rho \approx 7.917 \ g/mL}}\)

Explanation

Density can be found by dividing the mass by the volume.

\(\rho=\frac{m}{v}\)

We know the iron sheet has a mass of 28.5 grams and the volume is 3.60 milliliters.

\(m= 28.5 \ g \\d= 3.60 \ mL\)

Substitute the values into the formula.

\(\rho=\frac{28.5 \ g}{ 3.60 \ mL}\)

Divide.

\(\rho = 7.91666667 \ g/mL\)

Let's round to the nearest thousandth.

The 6 in the ten-thousandth tells us to round the 6 to a 7.

\(\rho \approx 7.917 \ g/mL\)

The density of iron is about 7.917 grams per milliliter.

The student with the correct statement is Arlo.

First, we shall determine the mole of sulphur in the jar. This can be obtained as follow:

Mole = mass / molar

Mole of sulphur = 16 / 32

Mole of sulphur = 1/2 mole

Finally, we shall determine the number of atoms in the jar. This can be obotained as follow:

From Avogadro's hypothesis,

1 mole of sulphur = 6.02×10²³ atoms

Therefore,

1/2 mole of sulphur = 1/2 × 6.02×10²³ atoms

1/2 mole of sulphur = 1/2 × Avogadro's number

Thus, the number of sulphur atom is 1/2 times Avogadro's number

Therefore, Arlo is correct.

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The correct answer is option C) Oceanic crust.

Oceanic Crust Oceanic crust, extending 5-10 kilometers (3-6 kilometers) beneath the ocean floor, is mostly composed of different types of basalts. Geologists often refer to the rocks of the oceanic crust as “sima.” Sima stands for silicate and magnesium, the most abundant minerals in oceanic crust.

Oceanic crust is thinner and denser than continental crust. This is because it has been compressed by the weight of the oceans it carries above it. It is also much younger than the Continental crust, as it is usually less than 200 million years old.

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Answer:

D

Explanation:

The weak crust of the earth does not hold together as well as strong crust.

Answer:

A and B was right in our test.

Explanation:

A was: A volcano can suddenly get taller every time it erupts

B was: Hot magma from inside Earth is released at weak points in the crust.

Explanation:

Distillation is the separation of mixture of two liquids which differ in boiling point. Through Distillation vapour that is formed spread thoroughly in our environment

Answer:

33/7

Multiply the denominator of the fraction by the whole number.

Add this result to the numerator of the fraction

answer becomes the numerator of the improper fraction.

Explanation:

Answer:

33/7

Explanation:

1. take the fraction and multiply the denominator by 4 to get 28

2. add the numerator to that... 28+5=32

The balloon's new volume is 24.6L. An arctic weather balloon being inflated using 24.6 litres of helium gas in a prep shed. The shed is seven degrees Celsius inside.

When the balloon is hauled outside, it is seven degrees Celsius outside. Any three-dimensional solid's volume is equal to how much room it occupies. One of these solids can be a cube, a cuboid, a cone, a cylinder, or a sphere. Chemical compounds are composed of a large number of comparable molecules (or molecular entities), which are composed of atoms from various elements bonded together by chemical bonds. Because of this, a molecule composed of atoms from a single element is not a compound.

v1/t1 = v2/t2

24.6/7 = v2/7

v2 = 24.6L

v1 = v2

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The electron in the ground state of an infinite potential energy well has an energy of 6.1 eV. To jump from the ground state to the first excited state, the electron must be supplied with an additional energy of 3.4 eV.

The energy levels of an electron in an infinite potential energy well are quantized, meaning that they can only have certain values. The ground state energy is the lowest energy level, and the first excited state is the next highest energy level. The difference in energy between the two states is 3.4 eV.

To jump from the ground state to the first excited state, the electron must absorb a photon with an energy of 3.4 eV. The photon will be emitted when the electron falls back to the ground state.

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Answer:

So F=2N

Hope this helps.

Explanation:

P= F/A, where P is pressure, F is force, A is area.

So

P=F/A

0.5N/cm2 = F/4cm2 <--(do cross

2N=F multiplication,

4×0.5)

( And pls check on the unit of area u wrote, it should be (4cm2), not (4cm3) Unit of area is cm2.)

Answer:

Carbon carbon | C2H8 - PubChem.

Explanation:

Brainliest plz :)

Answer:

Carbon carbon | C2H8

Explanation:

happy to help

Answer:

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

\(n = \frac{N}{L} \\ \)

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

\(n = \frac{2.4 \times {10}^{23} }{6.02 \times {10}^{23} } = \frac{2.4}{6.02} \\ = 0.398671096...\)

We have the final answer as

Hope this helps you

Answer:

Aluminum nitrate is a salt composed of aluminum and nitric acid, belonging to a group of reactive chemicals - organic nitrate and nitrite compounds. The nitrate ion is polyatomic, meaning it is composed of two or more ions that are covalently bonded. This ion makes up the conjugate base of nitric acid.

Explanation:

Answer:

Aluminum nitrate: Is a salt composed of aluminum and nitric acid. Making this belong to a group of reactive chemicals which is an organic nitrate and nitrite compounds. The nitrate ion is polymaic. Polymaic means it is composed of two or more ions that are covalently bonded.

Explanation:

Hope This Helps

Have A Great Day

~Zero~

Molarity of a KCL solution made by dissolving 28.4 g of KCL in a total volume of 500 ml is calculated as 0.7619 M KCL.

Mole is a unit of measurement used for chemical substance. Molarity is also known as the molar concentration of solution. It is the technique of calculating the amount of substance that a particular chemical solution contains.

As we know that the molar mass of KCl is 74.55 g/mol.

Hence, molarity = 28.4 g * 1 mol KCl /74.55 g * 1/500 mL * 1000 mL/1 L

Now, molarity = 0.7619 M KCl.

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