Question 4
1 pts
Tailings are a common form of mine waste that are stored at a mine site. Unlike waste rock, which is dry, crushed or broken rock, tailings are a wet slurry of very fine-grained, powdered rock and water. Examine the two Tailings Impoundments in the satellite image. Tailings impoundments are used to store tailings that have been produced at a mine site.
Why do you think Tailings Impoundment #1 looks different than Tailings Impoundment #2?

Explanation:

retype the equation.

the equation is'nt complete

Answer: Use the formula F= k q1q2/r^2 where k= 1/4π€ and it's value in air is 9× 10^9.

q1=q2= 2.4×10^-6C

F= 0.5N

You will get the value of r^2 and then will have to find the squre root of that value.

Explanation:

Answer:

This is because, within a period or family of elements, all electrons are added to the same shell.

When we move from left to right across the periodic table, we can see that the atomic radii keeps decreasing. This is because, as you move from left to right, the nucleus gains protons. The atomic number increases and hence the valence electron will feel more attracted towards the nucleus & the atomic radii will decrease.

\(\mathbb{MIREU}\)

The control mechanism you're referring to, where enzyme action stops due to a buildup of end product, is called A. negative feedback.

Negative feedback occurs when the accumulation of an end product inhibits the initial enzyme responsible for its production. This process helps maintain the optimal levels of substances within the cell and prevents overproduction. Here's a step-by-step explanation:

1. An enzyme catalyzes a reaction, leading to the formation of a product.
2. As the product accumulates, it reaches an optimal level within the cell.
3. When the optimal level is reached, the end product binds to the enzyme or its regulatory site, decreasing the enzyme's activity.
4. As a result, the production of the end product slows down, maintaining a balance within the cell.

This process ensures that resources and energy are not wasted in producing excess product and helps maintain homeostasis within the cell.

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Answer:

Explanation:

The net ionic equation is essentially the most simplified version of a reaction with only the reactants that form the precipitate (the solid). Due to this it is extremely important to properly write your ionic equation first. In your total ionic equation, you forgot to balance the compounds with 2- charges.  The coefficients in your equation is due to the 2- charge of sulfate and 2+  charge of Strontium. Additionally, precipitates are solid which means they do not dissociate. SrSO4 will stay together while KBR which are both spectator ions will dissociate leaving you with the ionic equation below.

Total Ionic Equation: Sr^2 (aq)+  + 2Br ^1- (aq) +2K ^ 1(aq) +  SO4 ^2- (aq) --> SrSO4 (s) + 2K^1+ (aq) + 2Br^1- (aq)

The coefficient of 2 on both K and Br in the products is to ensure that the equation is balanced and that for your net ionic equation, all spectator ions cancel. When you cancel all of the ions that dissociate you are left with the essence of the reaction:

Net Ionic Equation:  Sr^2 (aq) + SO4 ^2- (aq) --> SrSO4 (s)

The proper resonance structure of benzaldehyde that best illustrates why it is a moderately deactivating substituent is option c) C.

Benzaldehyde (C₆H₅CHO) has a moderately deactivating substituent due to the presence of the carbonyl group (-C=O). In resonance structures, the double bond can shift, allowing electron delocalization.

In option c) C, the double bond in the carbonyl group (-C=O) is shifted towards the oxygen atom, resulting in a resonance structure where the oxygen has a negative charge (O⁻) and the carbon has a positive charge (C⁺).

This resonance structure indicates that the oxygen atom withdraws electron density from the benzene ring, making it less electron-rich and less reactive. The withdrawal of electron density by the carbonyl group decreases the reactivity of the benzene ring towards electrophilic substitution reactions.

This is why benzaldehyde is considered a moderately deactivating substituent.

Therefore, option c) C is the proper resonance structure that best illustrates why benzaldehyde is a moderately deactivating substituent.

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Answer:

17.22 Grams

Explanation:

HOPE IT HELPS BESTIE.

The correct answer is option A. The mass of the sample decreased, so physical changes occurred as the metal first melted and then boiled out of the crucible. The decrease in mass is a result of the metal melting and then vaporizing as it is heated.

Physical changes refer to changes in the physical properties of a substance without altering its chemical composition. Examples of physical changes include melting, freezing, condensation, vaporization, sublimation, and physical state changes. Physical changes occur when a substance changes from one state of matter to another without a chemical reaction taking place.

This is an example of a physical change, as the material is changed from a solid to a liquid and then to a gas, but its chemical composition remains the same.

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100.0 mL of 0.30 M AlCl3 is a solutions of strong electrolytes contain the largest number of chloride ions.

A is the correct option.

The moles is calculated as

molarity= moles/ molecular weight×100

moles of AlCl3= 0.1×0.3×133.34

= 4 mole where there are 3 chloride ion so it will be 12 moles.

Moles of MgCl2= 0.05× 0.6× 95.21

= 2.85 where 2 chloride ion so it will be 3 moles.

Moles of NaCl =0.2× 0.4 ×58.5

= 4.67 where there is 1 chloride ion so it will be 4.67.

Mole is a unit of measurement for quantity, and molarity is a unit of measurement for concentration. The amount of substance contained in a combination is indicated by its molarity. The moles of material in the volume of solvent are used to calculate molarity. A molarity is not a unit; a mole is.

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In the mixture created with 5 grams of sugar, 5 grams of salt, and 4,000 cubic centimeters of water, the solvent is water.

A solvent is a substance that dissolves other substances to form a solution. In this case, water is the solvent because it is the substance that dissolves the sugar and salt to create the solution. The sugar and salt are the solutes, which are substances that are dissolved in a solvent to create a solution. In this mixture, water is the most abundant component, making up 4,000 cubic centimeters of the total volume, whereas sugar and salt only make up 5 grams each, so water is the solvent.

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Number of electrons in a Ca²⁺ = 18

In an atom there are levels of energy in the shell and sub shell  

This energy level is expressed in the form of electron configurations.  

Writing electron configurations starts from the lowest to the highest sub-shell energy level. There are 4 sub-shells in the shell of an atom, namely s, p, d and f. The maximum number of electrons for each sub shell is  

• s: 2 electrons  

• p: 6 electrons  

• d: 10 electrons and  

• f: 14 electrons  

Charging electrons in the sub shell uses the following sequence:  

1s², 2s², 2p⁶, 3s², 3p⁶, 4s², 3d¹⁰, 4p⁶, 5s², 4d¹⁰, 5p⁶, 6s², etc.  

The element Ca has an atomic number of 20, so the number of electrons and protons (in neutral atoms) is also 20

Electron configuration of Ca : 1s², 2s², 2p⁶, 3s², 3p⁶, 4s² ⇒[Ar] 4s²

When Ca releases 2 electrons to gain stability (forming Ca²⁺ cations), the number of electrons becomes:

\(\tt 20-2 = 18\)

and the electron configuration (Ca²⁺ ) becomes:

1s², 2s², 2p⁶, 3s², 3p⁶

The net ionic equations of the reactions are;

3Mn^3+(aq) + 4PO4^3-(aq) ----> Mn3(PO4)4(s)

Pd^2+(aq)  +  S^2-(aq) ----> PdS(s)

A net ionic equation is a chemical equation that shows only the species that participate in a reaction and contribute to the formation of a product or the consumption of a reactant.

It excludes any spectator ions that do not undergo a chemical change. In other words, it shows the actual chemical species that are involved in the reaction.

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Answer:

the method is fractional distillation

1) a) The apparatus that can be used to separate a mixture of ethanol and water is called a fractional distillation apparatus. It consists of the following components:

b) The method of separation used in this apparatus is called fractional distillation.

2) In fractional distillation, the fractionating column provides additional surfaces for the vaporized components to condense and revalorize.

Distillation flask: This is a round-bottomed flask where the mixture of ethanol and water is initially placed.

Fractionating column: A long column with several glass beads or plates. It provides a large surface area for the vaporized components to condense and revalorize, aiding in the separation process.

Thermometer: It is placed at the top of the fractionating column to monitor the temperature during the distillation process.

Condenser: It is a coiled glass tube connected to the fractionating column. Cold water flows through the condenser, causing the vaporized components to condense back into liquid form.

Receiver flask: This is where the separated components are collected. The receiver flask is placed at the end of the condenser.

b) The method of separation used in this apparatus is called fractional distillation. Fractional distillation is employed when the components of a mixture have similar boiling points. In the case of ethanol and water, they form an azeotropic mixture with a boiling point of around 78.2°C. Simple distillation would not effectively separate these two components because they would boil together and vaporize simultaneously.

In fractional distillation, the fractionating column provides additional surfaces for the vaporized components to condense and revaporize. This repeated condensation and revalorization process allows for more efficient separation. The higher surface area in the fractionating column helps to achieve better separation of the ethanol and water, resulting in a more concentrated sample of ethanol in the distillate collected in the receiver flask.

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Answer:

2--->C

6---->E

3---->D

4--->A

5--->B

1---->F

Explanation:

I think so, sorry if its wrong.

The 4-methyl pentane-2-ol (\(C_6H_{14}O\)) is an alcohol compound with a methyl group attached to the fourth carbon atom and a hydroxyl group attached to the second carbon atom in a five-carbon chain.

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Answer:
Higher pH (more alkaline)

Explanation:

The pH scale measures on a scale of 0 to 14 the acidity or basicness of whatever is being tested.

The lower the pH, the more acidic it will be. Acids are scaled as being anything having a pH of lower than 7.

The higher the pH, the more alkaline (or basic) it will be. Bases are scaled as being anything having a pH of higher than 7.

Substances that are at a pH of 7 are considered neutral, like water (H2O)

The solution with the highest concentration of hydronium ions is 0.050 M HCl.

Therefore option C is correct.

We will take a look at the strength of the acid and its molarity:

Hydrochloric acid (HCl) is a strong acid, which means it ionizes completely in water, releasing a high concentration of hydronium ions.

Acetic acid (\(HC_2H_3O_2\)) is a weak acid as it only partially ionizes in water, which causes  in a lower concentration of hydronium ions.

if we compare both solutions, then the solution with the highest concentration of hydronium ions would be the one with the highest molarity of the strong acid which is the HCl.

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Answer:
The answers are:

1. Gas particles act like tiny, solid spheres.
2. Gas particles are in constant, random motion.
4. Collisions are elastic, there is no energy lost as the particle hits the sides of the container.

Hope this helps!

According to the Kinetic Molecular Theory, the statements that are true of the gas particles are:

The Kinetic Molecular Theory actually states that the particles of gas are in motion constantly and their collisions are perfectly elastic.

This theory is actually used to give explanations for Boyle's and Charles' laws.

According to the Kinetic Molecular Theory, the collisions of the gas are elastic and are in constant motion.

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The mutated amino acid at position 229 is arginine (Arg), and its substitution can potentially disrupt the 3D structure and alter the function of the protein due to changes in side chain properties and interactions.

Structure of the Amino Acids:

The wild-type amino acid at position 229 is not specified, so the structure cannot be provided.

The mutated amino acid is arginine (Arg), which has a side chain containing a positively charged guanidinium group.

Importance of the Position:

The specific position 229 in the protein sequence may be functionally significant, such as being involved in protein-protein interactions, binding sites, catalytic activity, or structural stability.

Without detailed knowledge of the protein, its function, and its structural context, it is difficult to determine the exact importance of this specific position.

Effects of the Mutation on Structure and Function:

The substitution of an amino acid at position 229 from the original to arginine can have various effects on protein structure and function.

Arginine's larger and positively charged side chain may introduce steric clashes or alter electrostatic interactions within the protein structure.

The mutation can potentially disrupt local or global protein folding, stability, or conformational changes, affecting its overall 3D structure.

The functional consequences of the mutation depend on the specific role of the amino acid at position 229, which can include changes in protein-protein interactions, enzymatic activity, substrate binding, or signal transduction pathways.

It is crucial to analyze the protein's structural context, available experimental data, and computational modeling techniques to gain a more accurate understanding of the specific effects of the mutation on the protein's structure and function in the given context.

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Answer:

Shown below

Explanation:

Molar mass: 149.09

% Nitrogen: 28.2

% Hydrogen: 8.1

% Oxygen: 43.0

% Phosphorus: 20.8

The element with 14 protons, 14 neutrons, and 14 electrons is silicon (Si).

An element is a type of pure substance that cannot be broken down into a simpler substance. An element is characterized by the number of protons in the nucleus of its atoms, which is referred to as the atomic number. All atoms of an element have the same number of protons, which determines its identity. In the question, the element with 14 protons, 14 neutrons, and 14 electrons is silicon (Si).

The atomic number of silicon is 14, indicating that it has 14 protons in its nucleus. Its mass number, which is the total number of protons and neutrons in the nucleus, is 28 since it has 14 neutrons. The number of electrons in a neutral atom is equal to the number of protons, which is 14.

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The number of air molecules in a volume of 1.00 cm3 under the conditions of the vacuum pump is 3.65 * 10-15 moles and those that would be present at the same temperature but at 1.00 atm would be 0, 04 moles

The vacuum pump is a device that extracts gas molecules from a sealed volume, to create a partial vacuum, and is frequently used in industry, especially food.

To perform both calculations considering air as an ideal gas, the equation PV = nrt is used, in which

P = Pressure

V = Volume

n = number of moles

R = Gas constant

t = temperature

Data

t = 300K

V = 1L

P = 9.00 * 10-14 atm

R = 0.082 L Atm / mol °K .

n = ?

PV = nrt

n = PV/rt

n = 9.00 * 10-14. 1 / 0.082 . 300

n = 9.00 * 10-14 / 24.6

n = 3.65 * 10-15 moles

Data

t = 300K

V = 1L

P = 1 atm

R = 0.082 L Atm / mol °K .

n = ?

PV = nrt

n = PV/rt

n=1. 1 / 0.082 . 300

n = 1 / 24.6

n = 0.04 mole

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Answer:

The tectonic plates comprise the bottom of the crust and the top of the Earth's mantle. There are ten major plates on Earth and many more minor ones. They float on a plastic-like part of the Earth's mantle called the asthenosphere.

Explanation:

Answer:

Yes

Explanation:

Answer:

18.53

Explanation:

just finished and passed

For a particular shell in a given atom, removing an electron from the 2p subshell would require a higher first ionization energy.

The ionization energy refers to the energy required to remove an electron from an atom or ion. The ionization energy varies depending on the subshell from which the electron is being removed. In general, the ionization energy increases across a period and decreases down a group in the periodic table.

In the given question, if we consider a particular shell in a given atom, the subshells within that shell have different energies. Among the subshells, the 2p subshell requires a higher first ionization energy compared to other subshells within the same shell. This is because the 2p subshell is farther from the nucleus compared to the 1s and 2s subshells, and the electron in the 2p subshell experiences less effective nuclear charge and weaker electron-electron repulsion, making it more tightly bound to the atom and harder to remove. Therefore, removing an electron from the 2p subshell would require a higher first ionization energy.

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Answer:

Covalent bonds

Explanation:

Atoms with greatly differing electronegativity values are expected to form..... ... When two atoms each need additional electrons to fill their valence shells, but neither is electronegative enough to steal electrons from the other, they can form another kind of chemical bond called a covalent bond.