A mining company wants to build a modern processing plant that is safe for workers. The location of the plant is close to
the mining operation, which has inadvertently exposed some sources of radionuclides. Which is the best reason for
consulting with a nuclear chemist before building the processing plant?
O to determine the level of radionuclides present
O to explain the health concerns that are related to radiation
O to destroy all the radionuclides in the area immediately
O to conduct tests to see if workers are affected by radiation

To determine the empirical formula of the metal bromide formed, we need to first calculate the amount of chromium reacted and the amount of bromine reacted. The amount of chromium reacted can be calculated using its molar mass, which is 52 g/mol: 19.66 g chromium x (1 mol chromium / 52 g chromium) = 0.378 mol chromium.

Since there is excess bromine, all of the chromium would react with bromine to form the metal bromide. Therefore, the amount of bromine reacted can be calculated using the mass of the metal bromide formed:

110.3 g metal bromide x (1 mol metal bromide / molar mass of metal bromide) = amount of bromine reacted

We don't know the molar mass of the metal bromide yet, but we can use the law of conservation of mass to determine it. The mass of the metal bromide formed must equal the sum of the masses of the chromium and bromine that reacted.

110.3 g metal bromide = 19.66 g chromium + mass of bromine reacted mass of bromine reacted = 90.64 g

Now we can calculate the amount of bromine reacted:

90.64 g bromine x (1 mol bromine / 79.904 g bromine) = 1.133 mol bromine

To determine the empirical formula, we need to find the ratio of the moles of each element in the metal bromide.

Chromium: 0.378 mol
Bromine: 1.133 mol

To get a whole number ratio, we can divide both of these values by the smaller value (0.378 mol):

Chromium: 0.378 mol ÷ 0.378 mol = 1
Bromine: 1.133 mol ÷ 0.378 mol = 3

Therefore, the empirical formula of the metal bromide is CrBr3.

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Answer:

69.7 g of Na₂SO₄

Explanation:

We'll begin by writing the balanced equation for the reaction. This is illustrated below:

H₂SO₄ + 2NaOH —> Na₂SO₄ + 2H₂O

Next, we shall determine the masses of H₂SO₄ and NaOH that reacted and the mass of Na₂SO₄ produced from the balanced equation. This can be obtained as shown below:

Molar mass of H₂SO₄ = (2×1) + 32 + (4×16)

= 2 + 32 + 64

= 98 g/mol

Mass of H₂SO₄ from the balanced equation = 1 × 98 = 98 g

Molar mass of NaOH = 23 + 16 + 1

= 40 g/mol

Mass of NaOH from the balanced equation = 2 × 40 = 80 g

Molar mass of Na₂SO₄ = (2×23) + 32 + (4×16)

= 46 + 32 + 64

= 142 g/mol

Mass of Na₂SO₄ from the balanced equation = 1 × 142 = 142 g

SUMMARY:

From the balanced equation above,

98 g of H₂SO₄ reacted with 80 g of NaOH to produce 142 g of Na₂SO₄.

Next, we shall determine the limiting reactant. This can be obtained as follow:

From the balanced equation above,

98 g of H₂SO₄ reacted with 80 g of NaOH.

Therefore, 48.1 g of H₂SO₄ will react with = (48.1 × 80)/98 = 39.3 g of NaOH.

From the calculation made above, we can see that only 39.3 g of NaOH out of 51 g given was needed to react completely with 48.1 g of H₂SO₄. Therefore, H₂SO₄ is the limiting reactant and NaOH is the excess reactant.

Finally, we shall determine the maximum mass of Na₂SO₄ produced from the reaction. This can be obtained by using the limiting reactant as illustrated below:

NOTE: H₂SO₄ is the limiting

From the balanced equation above,

98 g of H₂SO₄ reacted to produce 142 g of Na₂SO₄.

Therefore, 48.1 g of H₂SO₄ will react to produce = (48.1 × 142)/98 = 69.7 g of Na₂SO₄.

Thus, 69.7 g of Na₂SO₄ were obtained from the reaction.

Answer: Yes a solution can be too concentrated

Explanation: At higher concentrations, beer’s law fails as the linearity of the law is limited to just instrumental and chemical factors. In a solution with a higher concentration, the proximity between the molecules is so close that there are deviations in the absorptivity.

To determine the number of molecules of PCI5, we need to use the following steps:

Convert the given mass of PCI5 to moles using the molar mass of PCI5.

Use Avogadro's number to convert the number of moles to molecules.

The molar mass of PCI5 can be calculated as follows:

P = 1 x 30.97 = 30.97

C = 1 x 12.01 = 12.01

I = 5 x 126.90 = 634.50

Molar mass of PCI5 = 30.97 + 12.01 + 634.50 = 677.48 g/mol

Mass to moles:

moles = mass / molar mass

moles = 77.4 g / 677.48 g/mol

moles = 0.114 moles

Moles to molecules:

One mole of any substance contains 6.022 x 10^23 particles (Avogadro's number).

Number of molecules = moles x Avogadro's number

Number of molecules = 0.114 mol x 6.022 x 10^23 mol^-1

Number of molecules = 6.87 x 10^22 molecules

Therefore, there are 6.87 x 10^22 molecules of PCI5 in 77.4g of PCI5.

The approximate age of the cloth is 17190 years.

We'll begin by calculating the number of half-lives that has elapsed. This can be obtained as follow:

2ⁿ = 100 / 13

2ⁿ = 8

2ⁿ = 2³

n = 3

Finally, we shall determine the age of the cloth.

t = n × t½

t = 3  × 5730

t = 17190 years

Thus, the approximate age of the cloth is 17190 years

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The energy (in joules) of 1 mole of photons with this frequency is 1.99 x 10⁻¹⁴ J per photon.

Should a substance happen to have a lot of electrons in a higher level, and a lower level is mostly empty  then a photon can cause an electron to transfer from a higher state to a lower one. This change releases energy and creates a new photon, in addition to the one which caused the transfer. This photon can in turn induce more electrons to fall to a lower state.

use formula

The energy of 1 mole of photons with the given frequency can be calculated using the following equation:

Energy (J) = Avogadro's number x Plank's Constant x Frequency

Therefore,

Energy (J) = 6.02 x 10²³ x 6.626 x 10⁻³⁴ x 5.40 x 10⁴

Energy (J) = 1.99 x 10⁻¹⁴ J

Therefore, the energy of 1 mole of photons with a frequency of 5.40 x 10⁴ Hz is 1.99 x 10⁻¹⁴ J, expressed in scientific notation.

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Not enough information man

Answer:

subtract

Explanation:

To find the net force of two bodies going in opposite directions, we must subtract the forces this is because they are not additive forces.

Therefore, 86.1 grams of calcium sulfate can dissolve in 75.0 L of pure water at equilibrium.

Only a small amount of calcium sulphate is available. The equilibrium constant, also referred to as the solubility product, is written as Ks for this kind of dissolution process. Ks = 4.9  10  6 for this reaction. K s = 4.9  10  6.

The formula for calcium sulphate's solubility product constant is:

Ksp = [Ca2+][SO42-]

The solubility product constant, Ksp, is equivalent to the product of the molar concentrations of Ca2+ and SO42- at equilibrium:

[Ca2+][SO42-] = Ksp

The following calculation can be used to determine the molar solubility of calcium sulphate:

Ksp = [Ca2+][SO42-] = x²

where x is the molar solubility of calcium sulfate.

Therefore, x = √(Ksp) = √(7.10 x 10⁻⁵) = 8.43 x 10³M

m = n × M

n = V × C

Substituting the given values, we get:

n = 75.0 L × 8.43 x 10⁻³ mol/L = 0.632 mol

m = 0.632 mol × 136.1 g/mol = 86.1 g

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The molarity of vinegar is 0.47368421 moles per liter.

To calculate this, we can use the following formula:

molarity = (initial_volume - total_volume_change) / final_volume

In this case, the initial volume is 7.5 mL, the total volume change is 21 mL, and the final volume is 28.5 mL. Plugging these values into the formula, we get:

molarity = (7.5 - 21) / 28.5 = -0.47368421

The negative value for molarity indicates that the solution is diluted. This is because the total volume of the solution increased by 21 mL, while the amount of solute (acetic acid) remained the same.

It is important to note that the molarity of a solution can change depending on the temperature. This is because the volume of a solution expands as it gets warmer. Therefore, it is important to measure the volume and temperature of a solution at the same time to get an accurate measurement of its molarity.

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A sunscreen made with Benzophenone-5 (\(C_1_4H_1_1NaO_6S\)) would be expected to be more waterproof than benzophenone-3 (\(C_1_4H_1_2O_3\)).

This is due to the presence of a sodium salt group (Na) and a sulfonic acid group (\(SO_3H\) ) in benzophenone-5, which makes it more polar than benzophenone-3. Polar molecules interact more strongly with water molecules and are less likely to dissolve in nonpolar solvents such as oils.

Because sunscreen is designed to be water-resistant, the more polar benzophenone-5 should have stronger interactions with water and give more water resistance than benzophenone-3.

Moreover, the sulfonic acid group in benzophenone-5 may allow it to make stronger hydrogen bonds with water, increasing its water resistance even further.

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According to the law of reciprocal proportions, they should combine in the ratio of 10.24:7.92:1.29 by mass.

According to the law of reciprocal proportions when two elements join to form more than one compound, the weights of one element that combine with a fixed weight of the another are in a ratio of small whole numbers.

In phosphine, phosphorus = 91.1 parts and hydrogen = 8.9 parts

So, 8.9 pads of hydrogen combine with phosphorus = 91.1 parts .

1 part of hydrogen combine =  91.1 / 8.9

= 10.24 parts

Similarly,

for water 88.8 / 11.2

= 7.92 parts of hydrogen

For Phosphorus tetra oxide

= 56.4 / 43.6

= 1.29 parts

Thus, According to the law of reciprocal proportions, they should combine in the ratio of 10.24:7.92:1.29 by mass.

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Answer:

0.0275 moles HCl

Explanation:

moles = Molarity (moles/L) x Volume in Liters = 1.1 moles/Liter x 0.025L = 0.0275 moles HCl

H₂ will have the highest average  kinetic energy

Energy because this motion is expressed as Kinetic energy (KE) which can be formulated as:  

\(\tt \displaystyle KE=\frac{1}{2}mv^2\)

Average velocities of gases can be expressed as root-mean-square averages. (V rms)  

\(\large{\boxed{\bold{v_{rms}=\sqrt{\frac{3RT}{Mm} } }}\)

R = gas constant, T = temperature, Mm = molar mass of the gas particles

From the two equations above, it can be concluded

So the highest KE is owned by the gas with the smallest molar mass

Molar mass of the gas :

A) H₂  : 2 g/mol

B) N₂ : 28 g/mol

C) O₂  : 32 g/mol

D) F₂ : 38 g/mol

So H₂ has the highest average  kinetic energy

At a constant temperature: E. All the gases will have the same average  kinetic energy.

According to the kinetic-molecular theory, the average kinetic energy of gas molecules (particles) is highly dependent on temperature.

Hence, the average kinetic energy of gas molecules (particles) is directly proportional to the absolute temperature of the gas.

At a constant temperature, all gases would have the same average kinetic energy according to the kinetic-molecular theory of gases.

In conclusion, all the gases would have the same average kinetic energy since the temperature is constant.

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Answer:

C. Physical weathering.

Answer: C. Physical weathering.

Explanation:

Answer:

I believe the answer is 1m/s²

Explanation:

acceleration= change in speed ÷ time (I hope this is correct)

Based on the law of conservation of energy, the student is incorrect because energy is converted from other forms, not created.

When a person throws a ball up into the air, and the ball falls back toward Earth, the speed is lowest when the ball leaves the persons hand.

The law of conservation of energy states that energy is neither created nor destroyed but can be transformed from one form to another.

Based on the law of conservation of energy, the student is incorrect because Energy is converted from other forms, not created.

When an object is falling freely under gravity, it's speed is minimum is lowest when the object leaves the persons hand and is maximum just before the object hits the ground.

Therefore, when a person throws a ball up into the air, and the ball falls back toward Earth, the speed is lowest when the ball leaves the persons hand.

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The true statement about the model is that the model shows how the various atoms are connected in the molecule.

What is a molecular model?

A molecular model is a representation of a molecule. We know that the molecular model shows the extent to which the atoms are bonded in the compound. The model gives us an idea of the intricate atom to atom arrangement that exists in the molecule that is under study.

Now we know that the atoms that are in the models must be shown by the use of different colors. This enables us to be able to effectively and properly distinguish between the atoms of the compound as shown in the model.

The true statement about the model is that the model shows how the various atoms are connected in the molecule.

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shared

Covalent bonds are characterized by the sharing of valence electrons.

Electronegativity

Covalent bonds occur between atoms that have similar electronegativity. Remember that electronegativity is how strongly an atom pulls electrons toward itself. So, if 2 atoms have similar electronegativities, then they will pull somewhat equally upon the electrons and share them. Most commonly, covalent bonds occur between nonmetals.

Ionic Bond

The second major form of bonding is ionic bonding. Ionic bonds form when there is a large difference in electronegativities. The difference is great enough that one of the atoms will completely lose one or more electrons, while the other will take the electrons. Since electrons are being transferred, the atoms become ions. Ionic bonds commonly occur between metals and nonmetals.

Answer:

first is cloud computing second is moores law third is biocomputing and the last one is quantum computing

Explanation:

The use of biological components like DNA to retrieve, process, and store data in the anticipated next generation of technologies that are expected to drastically increase processing capabilities are not possible.

DNA has a property by which it can replicate that si why said to be self-replicating material and always present in all living organisms few of them which cannot take but almost all.

DNA is the main constituent of chromosomes which is responsible to carry genetic information to the next generation and which cannot be used in computers as it is a natural thing controlled by nature only.

Therefore, the use of biological components like DNA to retrieve, process, and store data in the anticipated next generation of technologies that are expected to drastically increase processing capabilities are not possible.

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A cell is the structural and fundamental unit of life. The study of cells from its basic structure to the functions of every cell organelle is called Cell Biology. Robert Hooke was the first Biologist who discovered cells

two types of cell

1) Prokaryotes

2) Eukaryotes

Characteristics of Cells

1) Cells provide structure and support to the body of an organism.

2) The cell interior is organised into different individual organelles surrounded by a separate membrane.

3) The nucleus (major organelle) holds genetic information necessary for reproduction and cell growth

\(hope \: its \: helpful \: to \: you \: please \: mark \: me \: a \: brainliest\)

A cell is defined as the fundamental, structural and functional unit of all life.

have a great day

God bless you

An adaptation that is useful for living in one type of environment may be useless in a different environment. Organisms must live in a place that has the conditions they need to survive. Organisms generally have adaptations that allow them to survive in one particular enviroment.

The expression adaptations in a particular enviroment mean that these traits are only advantageous regarding the enviroment.

Therefore, with this data, we can see that the adaptations in a particular enviroment can be detrimental or beneficial depending on the enviroment.

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Answer:

9.10% dextrose

Explanation:

To find the mass percent, you need to use the following equation:

                               mass (g) of solute
Mass Percent  =  ---------------------------------  x  100%
                              mass (g) of solution

You can plug the given values into the equation and solve to find the mass percent of dextrose. But first, you need to calculate the mass of the solution.

Mass (solute): 25.0 g

Mass (solution): 250.0 g + 25.0 g = 275 g

                                25.0 grams
Mass Percent  =  ------------------------  x  100%
                                 275 grams

Mass Percent  =  0.0909 x 100%

Mass Percent  =  9.10%

A solution of dextrose contains 25.0 g solute in 250.0 g water. 9.10% is the percentage by mass of dextrose in this solution.

A component's concentration in a combination or compound can be expressed as a mass percent, also known as a weight percent. It shows how much of the total mass of the solution or mixture is made up of the solute's (component's) mass. In chemistry, mass percent is frequently employed and stated as a percentage.

Mass Percent  =     mass (g) of solute/       mass (g) of solution x  100%

Mass (solute): 25.0 g

Mass (solution): 250.0 g + 25.0 g = 275 g

Mass Percent  =25.0 grams /    275 grams x  100%

Mass Percent  =  0.0909 x 100%

Mass Percent  =  9.10%

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The number of the atoms that should be the numerator is 6.02 * 10^23 atoms.

We have to note that the conversion factor is the factor that can be used in the conversion of one unit to the other. We have to note that if we are able to change the unit then we can be able to make the conversion.

We have to note that the Avogadro's number is the number of atoms that we can find in one mole of a substance and it has a value of about 6.02 * 10^23 atoms in the atom of magnesium.

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Answer:

calcium has more mass

Explanation:

1 mole calcium mass= 40.078 g

1 mole magnesium mass= 24.305 g

The pH of the 0.15 M \(CH_3COOH\) solution is approximately 2.38. and around 2.9% of the \(CH_3COOH\) molecules in the 0.15 M solution are deprotonated.

Acetic acid (\(CH_3COOH\)) is a weak acid that only partially dissociates in water to form \(H^+\) ions and \(CH_3COO^-\) ions. To estimate the pH and fraction of \(CH_3COOH\)molecules deprotonated in a 0.15 M \(CH_3COOH\)solution, we can use the following equations and approximations:

The dissociation constant for acetic acid (Ka) is 1.8 x 10^-5.

The initial concentration of \(CH_3COOH\) is equal to its concentration at equilibrium, since it only partially dissociates.

The concentration of \(H^+\) ions is equal to the concentration of \(CH_3COO^-\) ions at equilibrium, since the dissociation reaction involves a 1:1 ratio of \(H^+\) ions to \(CH_3COO^-\) ions.

Using these approximations, we can set up an equilibrium expression for the dissociation of \(CH_3COOH\) :

\(Ka = [H^+][CH_3COO^-]/[CH_3COOH]\)

We also know that the initial concentration of \(CH_3COOH\) is 0.15 M. Let x be the concentration of \(H^+\) ions and \(CH_3COO^-\) ions at equilibrium. Then:

[\(H^+\)] = x

[\(CH_3COO^-\)] = x

[\(CH_3COOH\)] = 0.15 - x

Substituting these values into the equilibrium expression and solving for x, we get:

Ka = x^2 / (0.15 - x)

1.8 x 10^-5 = x^2 / (0.15 - x)

x = 0.0042 M

The pH can be calculated using the formula:

pH = -log[\(H^+\)]

pH = -log(0.0042)

pH = 2.38

Therefore, the pH of the 0.15 M \(CH_3COOH\) solution is approximately 2.38.

To estimate the fraction of \(CH_3COOH\) molecules that are deprotonated, we can use the equation:

Fraction deprotonated = \([CH_3COO^-] / [CH_3COOH]\) x 100%

At equilibrium, the concentration of \(CH_3COO^-\) ions is equal to the concentration of \(H^+\) ions, which we calculated to be 0.0042 M. The concentration of \(CH_3COOH\) at equilibrium is 0.15 - 0.0042 = 0.1458 M. Substituting these values into the equation, we get:

Fraction deprotonated = 0.0042 / 0.1458 x 100%

Fraction deprotonated = 2.9%

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Answer:

Exxplanation:

Answer:

Although it is possible to have more than one state, it is also possible to have only one state.

Explanation: