Iodine-131 is one of the most important isotopes used in the diagnosis of thyroid cancer. One atom has a mass of 130.906114 amu. Calculate the binding energy(c) per mole in kJ.

Answer + Explanation:

During a car crash, kinetic energy is lost through various forms of deformation of the vehicle and the generation of heat.

When a car collides with another object, the force of the impact causes the vehicle's body and structure to deform. This deformation absorbs some of the kinetic energy and converts it into other forms of energy, such as heat and sound.

In addition, friction between the moving parts of the car and between the car and the road can also generate heat, which absorbs some of the kinetic energy.

The amount of kinetic energy lost during a car crash depends on the mass of the vehicle, the speed at which it was traveling, and the type and severity of the collision. In general, higher speeds and more severe collisions result in greater kinetic energy loss.

Determine how many mL of solution A (acetic acid-indicator solution) must be added to solution B (sodium acetate-indicator solution) to obtain a buffer solution that is equimolar in acetate and acetic acid. Solution A: 10.0 mL 3.0e-4M bromescol green

hoped I helped

Answer:

89.1 N

Explanation:

W = m gm = 55.0 x 1.62 = 89.1 N

The magnitude of Kw indicates that B. water auto-ionizes only to a very small extent.

Kw, also known as the ionization constant of water, is a measure of the extent to which water molecules dissociate into hydronium ions (H3O+) and hydroxide ions (OH-) in aqueous solution. The value of Kw is determined to be 1.0 x 10^-14 at 25 degrees Celsius. This small value indicates that water auto-ionizes only to a very small extent. In other words, the concentration of both hydronium and hydroxide ions in pure water is very low, suggesting that the auto-ionization process occurs minimally.

The auto-ionization of water is a relatively slow process, and the number of water molecules that dissociate into ions at any given time is small compared to the total number of water molecules present.

Option B is answer.

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Answer:

density, is the a substance is its mass per unit volume thats what i wrote in my notebook

Explanation:

The molarity of the dilute solution prepared by transferring 20.00 mL of a 0.3965 M stock solution to a 900.0 mL volumetric flask and diluting to the mark is approximately 0.00881 M.

To calculate the molarity of the dilute solution, we can use the formula:

M1V1 = M2V2

where M1 is the molarity of the stock solution, V1 is the volume of the stock solution used, M2 is the molarity of the dilute solution, and V2 is the final volume of the dilute solution.

Given:

M1 = 0.3965 M

V1 = 20.00 mL = 20.00/1000 L = 0.0200 L

V2 = 900.0 mL = 900.0/1000 L = 0.900 L

Using the formula:

M1V1 = M2V2

0.3965 M × 0.0200 L = M2 × 0.900 L

M2 = (0.3965 M × 0.0200 L) / 0.900 L ≈ 0.00881 M

Therefore, the molarity of the dilute solution is approximately 0.00881 M.

The molarity of the dilute solution prepared by transferring 20.00 mL of a 0.3965 M stock solution to a 900.0 mL volumetric flask and diluting to the mark is approximately 0.00881 M.

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The bond order for a second-period diatomic particle containing five electrons in antibonding molecular orbitals and eight electrons in bonding molecular orbitals is 1.5

Bond order is defined as the number of electrons in bonding molecular orbitals minus the number of electrons in antibonding molecular orbitals divided by two. As a result, we may determine the bond order of this diatomic particle by the formula: Bond order = (number of bonding electrons - number of antibonding electrons) / 2

Bond order = (8 - 5) / 2

Bond order = 1.5.

This diatomic molecule, according to the bond order, is a stable molecule since the bond order is greater than 1, indicating that it is a double bond. The molecule has an overall bond strength that is greater than a single bond, but not as strong as a triple bond. So therefore he bond order for a second-period diatomic particle containing five electrons in antibonding molecular orbitals and eight electrons in bonding molecular orbitals is 1.5

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Basalts are formed in many areas of the earth such as the colorado, red sea, oceanic crust and others.

Basalts are are formed from the cooling of lava from the Earth's surface. The lava from which these basalts are made from is from magma.

This formed basalt is a form of igneous rock. The outside layer of the earth crust which is the oceanic crust is where the basalts are formed.

However, the importance of basalts cannot be overemphasized as is used in many building materials. It is also used for thermal purposes.

In conclusion, it can be deduced that the basalts are also created or produced in the oceanic crust of the earth.

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Answer:

I am confident that it is the last answer but if you can find a more verified answer I would go for that.

Explanation:

The density of a substance can be found by using the formula

\(density = \frac{mass}{volume} \\\)

From the question

mass = 14.7 g

volume = 2.2 cm³

The density is

\(density = \frac{14.7}{2.2} \\ = 6.6818181...\)

We have the final answer as

Hope this helps you

Experimental errors or variations can significantly impact the results of the experiment. In this case, inadequate stirring, incomplete mixing of layers, incorrect extraction solution, and improper pH measurement can lead to inaccurate component percentages in the final product.

(a) Inadequate stirring or shaking of the mixture after adding DCM to Pan acetin can result in incomplete dissolution or extraction of certain components. This would lead to lower percentages of the components that require proper mixing for their extraction.

(b) Failure to thoroughly mix the aqueous and organic layers during the NaOH extraction can cause incomplete transfer of target components from one layer to another. As a result, the percentages of the desired components may be lower than expected, indicating incomplete extraction.

(c) Mistakenly using 5% HCL instead of 5% NaOH for the DCM extraction can affect the selectivity of the extraction process. Different solvents have varying affinities for specific components, so using the wrong extraction solution can lead to incorrect percentages of the components in the final product.

(d) Instead of using pH paper, if litmus paper is used to neutralize the \(NaHCO_{3}\) solution to pH 7, the accuracy of pH measurement may be compromised. Litmus paper provides a visual color change indication but lacks the precision of pH paper. As a result, the pH adjustment may not be accurate, potentially leading to deviations in the final component percentages.

In summary, these experimental errors or variations can introduce inaccuracies in the component percentages of the final product due to inadequate mixing, incorrect extraction solution, and imprecise pH measurement. It is essential to carefully follow the experimental procedure to minimize such errors and ensure reliable results.

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The given question is incomplete the complete question is

Now, we would like you to share your plant evaluations with Sandy Waters, President of Save the Shoreline. You will do this by writing Mr. Waters a letter. When writing your letter, be sure to use a traditional letter format. This means that your letter should include a greeting (Dear ________, ) a body, and a closing (Sincerely, _________). The body of your letter must include the following: an opening that describes the procedure for ranking plants all plant rankings evidence from the data to support plant rankings a closing that explains how plant rankings could protect the dunes As always, be sure to use complete sentences and proper punctuation, capitalization, and spelling.

Identification of plant includes scientific name and origin of species

Plant is the living thing that grow in the earth and that has a stem leaves and roots

Dear sandy water, the most common process of plant identification is by comparison and in this process the newly collected sample is compared with another collected and identified sample if all characteristics are same then name of sample can be determined

Your sincerely

With this information, we can conclude that identification of a sample includes providing the scientific name and origin of the species

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Answer:

Nice Profile Pic

Explanation:

The density of gasoline id 0.008 g/ml is 18.64 gram.

Density is defined as mass per unit volume it means that mass is present in one meter cube.

S.I unit of density is kg/meter^3.

Mathematically

Density = Mass/Volume.

In above question

Volume = 2330 mL

Density = 0.008 g/mL

Density = mass/ volume

So,

Mass = density x volume

Mass = 0.008 x 2330

Mass = 18.64 gram

Therefore, The density of gasoline id 0.008 g/ml is 18.64 gram.

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Answer:

The closer a place is to the equator the warmer it is

Explanation:

The equator is the part of the earth that is in the sun the longest and the poles are in the sun for a very short period of time each year. Therefore the equator is the warmest compared to the two poles.

Answer:0

Explanation: zero because it is the most stable form of oxygen in its standard state

The correct answer for this question is "A new system of units will have to be formulated."

When the mass (kg), force (N), and length (m) are the base units, it forms the SI system.

Therefore, the SI system is not appropriate in this scenario since it has meter, kilogram, and second as its base units. The only option remaining is to form a new system of units that would support these base units in order to resolve the problem.The Metric system is a popular system that is used all around the world. It is quite simple and has three main base units which include mass (gram), length (meter), and time (second). However, it is not acceptable for the aforementioned scenario. Instead, a new system of units will have to be formulated that would support the base units of mass, force, and length.

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Fuel-efficient cars help decrease the global dependency on nonrenewable resources because they use less fuel than other vehicles to travel the same distance.

Nonrenewable resources are natural resources that cannot be readily replaced or regenerated, such as fossil fuels (coal, oil, and natural gas), minerals, and some metals. These resources are finite and once they are used they cannot be replenished. They are formed over millions of years and are essential for the functioning of modern society, but their extraction and use can have negative impacts on the environment.

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Answer:

Increase in temperature will not affect a solid - liquid mixture. Example can be taken of salt and water

First, we define density as:

Density = mass/volume;

We focus first on the volume of air in the room.

Volume:

We have the measurements of where the air is.

We calculate the volume with these measurements, but first, we change the units to L:

1 inch = 2.54 cm

1 L = 10^3 cm^3

1 ft = 12 inch

Now,

11.0 ft x (12 in/1 ft) x (2.54 cm/1 in) = 335.28 cm

12.0 ft = 365.76 cm

10.0 ft = 304.8 cm

Therefore, the volume of the room = 335.28 cm x 365.76 cm x 304.8 cm

Volume = 37378237.5 cm^3 x (1 L/10^3cm^3) = 374 x 10^2 L

From the Density equation, we clear the mass:

Density x volume = mass (g)

1.19 g/L x 374x10^2 L = 445x10^2 g x (1 kg/1000 g) = 44.5 kg

Answer: 44.5 kg

Answer:

280 liters at STP are in 8.0*10² grams of sulfur dioxide.

Explanation:

The STP conditions refer to the standard temperature and pressure. Pressure values at 1 atmosphere and temperature at 0 ° C are used and are reference values for gases. And in these conditions 1 mole of any gas occupies an approximate volume of 22.4 liters.

In this case, the molar mass of sulfur dioxide, that is, the mass of one mole of the substance, is 64 g/mole.

You can apply the following rule of three: if by definition of molar mass 64 grams of sulfur dioxide are contained in 1 mole, 8.0*10² grams are contained in how many moles?

\(amount of moles=\frac{8*10^{2}grams*1 mole }{64 grams}\)

amount of moles= 12.5 moles

Now you can apply a new rule of three: if by STP conditions 1 mole of any gas occupies a volume of 22.4 liters, 12.5 moles will occupy how much volume?

\(volume=\frac{12.5 moles*22.4 L}{1 mole}\)

volume= 280 L

280 liters at STP are in 8.0*10² grams of sulfur dioxide.

The mass of the piece of cork is determined by its density, which can vary depending on the specific type of cork.

To calculate the mass of the piece of cork, we need to know its density. Density is defined as the mass per unit volume of a substance. However, the question only provides the volume of the cork, which is 35.5 milliliters (ml). Without the density, we cannot directly determine the mass.

To find the mass, we need to multiply the volume by the density of the cork. Density is typically expressed in grams per milliliter (g/ml) or grams per cubic centimeter (g/cm³). Once we have the density, we can use the formula:

Mass (g) = Volume (ml) x Density (g/ml)

Without information about the density of the cork, we cannot accurately calculate its mass. Therefore, we need additional data or specifications to proceed with the calculation.

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Answer:

The atomic weight Ar, of M is 64

Explanation:

The formula of the given compound is M(OH)₂

Mr, is the molecular weight of a compound and for the given compound, Mr is equal to 98.

Ar, is the atomic weight of the elements in the compound

The molecular weight, Mrof a compound is the mass of one mole mole of that compound. It can be obtained by summing the atomic masses of all elements in that compound. For elements that has more than one atom in the compound, the atomic weight of that element is multiplied by the number of atoms of the element present in the compound and then the sum of the weight of each element gives the molecular weight of the compound.

Onnthe compound above,the atomic weight of the unknown element M, is to be obtained.

Ar of the other elements inn he compound is given : Ar of O = 16, Ar of H = 1.

Molecular weight of the compound, Mr = 98

Calculating for the Ar of M:

(M × 1) + (16 × 2) + (1 × 2) = 98

M +32 + 2 = 98

M + 34 = 98

M = 98 -34

M = 64

Therefore, the atomic weight Ar, of M is 64

The given reaction is already balanced, that is to say tha the number of atoms in the reactants matches the number of atoms in the products. In the reaction, we can see the relationship between CaC2 and H2O. For each mole of CaC2 two moles of H2O react.

So, if 4.8 moles of CaC2 are consumed the moles of H2O needed will be:

Mol of H2O = Mol of CaC2 x 2

Mol of H2O = 4.8 x 2 = 9.6 mol of H2O

Now, to calculate the grams of H2O we will use the following equation and the mass molar of H2O.

Mass molar of H2O =18.01 g/mol

So, if 4.8 moles of CaC2 are consumed in this reaction, 172.9 g of H2O are needed

Answer:

of zinc sulfide:

0.382 moles ZnS * 97.45 g/mol = 37.4 g ZnS

To find the mass of the excess reactant (sulfur) that will remain after the reaction is complete, we need to subtract the mass of the product (zinc sulfide) from the mass of the excess reactant:

30.0 g sulfur - 37.4 g ZnS = -7.4 g excess sulfur

Since the mass of the excess reactant is negative, this means that the reaction will consume all of the sulfur and there will be none left over.

To summarize:

A. Zinc is the limiting reactant.

B. 37.4 g of ZnS will be formed.

C. There will be no excess sulfur left over after the reaction is complete.

Explanation: