Endocrine disruptors are commonly found in
a. pesticides
b. plastics and consumer products
c industrial by-products
d. all of the above​
help pls!!!!

Answer:

2 Zn + Ag 2O = 2ZnO + Ag

Explanation:

At the end you will have 2 zn on each side, 1 ag on each side, and 2 o on each side.

Answer:

Liquid and gases are both fluid and helps in transfer of different substances but solid is not a fluid medium because it is rigid

The strongest interactions in the compound sodium fluoride, NaF, are examples of a) ionic bonds. Ionic bonds occur between ions with opposite charges and are the result of the transfer of electrons from one atom to another.

In the case of NaF, the sodium atom donates an electron to the fluorine atom, creating a positively charged sodium ion and a negatively charged fluoride ion. These ions are then attracted to each other due to their opposite charges, forming an ionic bond. This bond is very strong and requires a lot of energy to break.

Ionic compounds like NaF typically have high melting and boiling points, are usually solids at room temperature, and dissolve easily in water due to their ability to interact with water molecules through ion-dipole interactions.

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Reaction A is chemical, while Reaction B is nuclear, is the proper response. Electrons are involved in chemical processes that take place outside of the atomic nucleus and release modest quantities of energy.

On the other hand, nuclear processes, which take place inside the atomic nucleus and include neutrons, release comparatively high levels of energy. The terms "weak nuclear" and "strong nuclear," which describe the forces that hold protons and neutrons together in the nucleus, are inapplicable in this situation.

These forces are not present in chemical and nuclear reactions, which are fundamentally distinct processes. Nuclear reactions entail the conversion of one element into another, whereas chemical reactions require the building and breaking of chemical bonds.

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A ground state atom of the element that has the one electron in its fourth and the outermost main energy level is the correct option is a. K.

The atomic number of the element potassium ,K is 19. The potassium atom has the 19 protons and the 19 electrons. There are 2 electrons on the potassium atom first energy level, the 8 electrons on the potassium atom second level, the 8 electrons on the potassium atom third energy level, and 1 on the potassium fourth energy level.

Thus, the fourth energy level of the element potassium has the only 1 electron.

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Answer:

132g/mol

Explanation:

The problem here is to find the molar mass of the compound in g/mol

To solve this problem, we simply sum the atomic masses of the atoms in the compound:

   (NH₄)₂ SO₄:

  Atomic mass of N  = 14g

   Atomic mass of H  = 1g

  Atomic mass of S  = 32g

  Atomic mass of O = 16g

So;

   Molar mass = 2[(14 + 4(1))] + 32 + 4(16)  = 132g/mol

When two atoms of the same element differ on the number of neutrons, they are called Isotopes, that is they have the same number of protons, but not the same number of neutrons.

Answer: b

Explanation:

Pipeline is a form of transportation that is restricted to specialist goods like liquids and gases.

Manufacturing companies might use a variety of transportation methods that are used in logistics. However, these differ according on shipment volume, price, and destination. The manufacturing businesses that create liquid, semi-liquid, and gas products are most suited for this form of transportation. Pipeline construction might be expensive, but the expenditures per mile are lower.

They are very specialised and restricted to slurry forms of liquids, gases, and solids. There is no need for packing, and the cost per mile is inexpensive.

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Answer:

Distance = speed * Time

hope it helps

Answer:

Distance formula (x2 - a1) ° + (y2 - Yı)?

d - d = distance

(x1, Y1) coordinates of the first point

(x2, Y2) = coordinates of the second point

When describing a chemical reaction, it is important to note the components that are present at the start and the end of the process. The substances present at the beginning are referred to as reactants, while the substances present at the conclusion are referred to as products.

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The molecule with the molecular formula CCl2O is called dichloromethanal, also known as formaldehyde chloride. Its complete structure can be represented as follows:

        Cl

         |

   H - C - Cl

In this structure, the central carbon atom (C) is bonded to two chlorine atoms (Cl) and one hydrogen atom (H). The chlorine atoms are attached to the carbon atom on either side, and the hydrogen atom is attached to the carbon atom at the opposite end. The structure indicates that the carbon atom is double-bonded to the oxygen atom (O), which completes the molecular formula CCl2O.

The molecular formula CCl2O does not correspond to a stable molecule. However, if you intended to ask for a structure with the molecular formula CCl2O2, which is dichlorine dioxide, the structure can be represented as follows:

        Cl

         |

   O = C = O

         |

        Cl

In this structure, the central carbon atom (C) is double-bonded to both oxygen atoms (O). Each chlorine atom (Cl) is attached to the carbon atom on either side. This arrangement satisfies the molecular formula CCl2O2.

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To determine the amount of water and methane needed, we can set up a system of equations based on the desired composition of the mixture. you should use 36 gallons of water and 54 gallons of methane to obtain a mixture of 90 gallons with a methane concentration of 60%.

Let's assume x represents the number of gallons of water and y represents the number of gallons of methane. We have the following information: The total volume of the mixture is 90 gallons: x + y = 90. The mixture should be 60% methane: (y / (x + y)) * 100 = 60. Simplifying the second equation: y / (x + y) = 0.6. Now we can solve the system of equations: From equation 1, we can express x in terms of y: x = 90 - y. Substituting this into equation 2: y / ((90 - y) + y) = 0.6. Simplifying further: y / 90 = 0.6. Solving for y: y = 0.6 * 90. y = 54. Now we can find x using equation 1: x = 90 - y. x = 90 - 54. x = 36. Therefore, you should use 36 gallons of water and 54 gallons of methane to obtain a mixture of 90 gallons with a methane concentration of 60%.

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None of the provided rate expressions is correct. The correct rate expression for the given reaction, where ki is defined with respect to B, is r = kA[A]^3[IB]^4.

The stoichiometry of the reaction is given as 3A + 4B. Let's assume the rate of reaction as r, and the rate constants as kA and kB for the reactants A and B, respectively.

Based on the stoichiometry, the rate expression can be written as follows:

r = kA[A]^3[B]^4

Since ki is defined with respect to B, we can substitute kB with ki in the rate expression:

r = kA[A]^3[IB]^4

However, none of the given rate expressions in the options match this form. Let's analyze each option:

Option 1: La = -kC

This expression does not account for the stoichiometry of the reaction, as it only includes a single reactant C. It does not include terms for A or B, nor does it consider the stoichiometric coefficients.

Option 2: IB = kiC^64

This expression contains an incorrect stoichiometric coefficient for C (C^64). Additionally, it does not consider the stoichiometry of the reaction involving A.

Option 3: IB = +(4/3)ra TA = -(4/3)kiC^3

This expression contains an incorrect stoichiometric coefficient for C (C^3). Additionally, it introduces additional terms (ra and TA) that are not part of the rate expression based on the given stoichiometry.

None of the provided rate expressions is correct. The correct rate expression for the given reaction, where ki is defined with respect to B, is r = kA[A]^3[IB]^4.

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Fluorescent bulb is the more efficient one.

An electric bulb which has a filament inside it and the electricity passes through the filament and it get heated an it glows. The condition inside the bulb is vacuum or inert gas. This is an incandescent bulb. they uses a lot of energy.

Fluorescent bulb is a  mercury vapour low pressure, gas discharge lamp which will use less energy and fluoresce to produce visible light. So in this the electric current will cause the gas to get exited and there is a production of UV light which causes the coating on the inside of the lamp to glow..

Fluorescent bulb is the more efficient that the incandescent bulbs. They also have more life span than incandescent bulbs.

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Since iron is more reactive than copper, when steel wopl is placed in a solution of copper (II) sulfate solution into a small beaker, it dissolves and copper metal is produced.

A displacement reaction is one in which a more reactive element displaces another from its compound.

Reactive metals displace less reactive metals from their solutions.

Iron is a more reactive metal than copper and will displace copper from a solution of its salt.

Therefore, when steel wool is placed in a solution of copper (II) sulfate solution into a small beaker, the iron dissolves and copper metal is produced.

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Reaction 2

ATP + H2O ⟶ ADP + Pi + 7.3 kcal/mol is a spontaneous (favorable) reaction.

To determine whether a reaction is spontaneous or nonspontaneous, we can examine the change in free energy (ΔG) for the reaction. If ΔG is negative, the reaction is spontaneous, indicating that it can proceed independently without requiring an input of energy. If ΔG is positive, the reaction is nonspontaneous and requires an input of energy. In the given reaction, 7.3 kcal/mol is released as free energy. This implies that the reaction releases energy and is, therefore, exergonic. In other words, the products (ADP and Pi) have lower free energy than the reactants (ATP and H2O). Since the reaction releases energy and has a negative ΔG, it is considered spontaneous. Spontaneous reactions tend to occur naturally and do not require external energy sources. In the context of glycolysis, the coupling of Reaction 1

(glucose + Pi ⟶ glucose-6-phosphate + H2O)

with Reaction 2

(ATP + H2O ⟶ ADP + Pi + 7.3 kcal/mol)

Allows for the overall process of glucose phosphorylation to proceed. The energy released in spontaneous Reaction 2 drives the nonspontaneous Reaction 1, making the overall process energetically favorable.

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The value of the equilibrium constant for this reaction is 1.50 x \(10^{-5}\) for the reaction between nitrogen and water to form nitrogen monoxide and hydrogen.

The equilibrium constant, K, expresses the ratio of products to reactants at equilibrium for a given reaction. For the reaction between nitrogen and water to form nitrogen monoxide and hydrogen, the equilibrium constant expression can be written as:

K = [NO]²[H2]² / [N2][H2O]²

where [ ] denotes concentration in units of moles per liter.

Given the partial pressures of each compound at equilibrium, we need to convert them to concentrations using the ideal gas law: PV = nRT.

Rearranging to solve for concentration: [ ] = P/RT.

Substituting the given pressures and assuming a temperature of 298 K, we obtain:

[N2] = 61.7 atm / (0.0821 Latm/molK × 298 K) = 2.46 M

[H2O] = 20.2 atm / (0.0821 Latm/molK × 298 K) = 0.806 M

[NO] = 42.5 atm / (0.0821 Latm/molK × 298 K) = 1.69 M

[H2] = 9.78 atm / (0.0821 Latm/molK × 298 K) = 0.391 M

Substituting these concentrations into the equilibrium constant expression, we obtain:

K = (1.69 M)² × (0.391 M)² / (2.46 M) × (0.806 M)² = 1.50 x \(10^{-5}\)

Therefore, the equilibrium constant for the given reaction is 1.50 x \(10^{-5}\).

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The question is -

Nitrogen and water react to form nitrogen monoxide and hydrogen, like this: N2(g) + 2 H20(g) 2 NO(g) + 2H(g)

Also, a chemist finds that at a certain temperature, the equilibrium mixture of nitrogen, water, nitrogen monoxide, and hydrogen has the following

composition             compound pressure at equilibrium

N2                             61.7 atm

H20                           20.2 atm

NO                             42.5 atm

H2                             9.78 atm

calculate the value of the equilibrium constant for this reaction.

The solution with the lowest vapor pressure would be sodium chloride. The main reason for this is that the vapor pressure of a solution is directly proportional to the number of solute particles present in it.

Sodium chloride dissociates into two ions (Na+ and Cl-) when dissolved in water, while glucose and calcium chloride do not dissociate. Therefore, sodium chloride has more solute particles in its solution compared to glucose and calcium chloride. This results in a lower vapor pressure for sodium chloride compared to the other two solutions. In summary, the explanation for sodium chloride having the lowest vapor pressure is due to its dissociation into ions when dissolved in water, resulting in a higher concentration of solute particles in the solution.

Vapor pressure depends on the number of solute particles present in the solution. When comparing glucose, sodium chloride, and calcium chloride, we need to consider their dissociation in water. Glucose (C6H12O6) does not dissociate in water and remains as a single molecule. Sodium chloride (NaCl) dissociates into two ions: Na+ and Cl-. Calcium chloride (CaCl2) dissociates into three ions: Ca2+ and two Cl- ions.
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Answer:

Increasing the temperature will cause chemical changes to occur faster. Decreasing the temperature, causes the particles to lose energy which causes them to move around less and slower. The less they move, the less collisions occur, and the less reactions occur between the chemicals = slower reaction rate.

Explanation:

Answer:

Carbon atoms each form four strong bonds. The bonds are covalent (atoms share electrons). This gives graphite its characteristic properties such as high melting and boiling points, good electrical conductivity, and softness. Use as pencil 'lead', as a lubricant in oil, furnace linings, electrodes, neutron moderators in nuclear power stations.

Diamond atoms each form three strong covalent bonds in the same layer and one weak bond to an atom in another layer.  Diamonds have a high level of hardness, thermal conductivity, and optical dispersion. It is used for jewellery, oil-well drills, abrasives and cutting tools.

Explanation:

Structure of Graphite and Diamond (attached below):

Answer:\

1.08 grams

Explanation:

first, we need to find the number of moles

we divide 12.1/22.4=0.54 moles

we multiply the number of moles with the molecular mass 0.54x2=1.08g

I do not know, i just need points :/

Answer:

HIGHLY ENDOTHERMIC

Explanation:

Endothermic and exothermic reactions are based on energy absorption and energy release when the product formation occurs in a chemical reaction.

Highly endothermic reactions will need a lot of energy.

The reaction in which the reactants absorbs the heat and energy from the system it is present to for the products is called the endothermic reaction.

The chemical reaction in which the heat is produced when the products are created is called the exothermic reaction.

Therefore, option A is correct.

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The following describes a panel of tests for carbon dioxide, potassium, chloride, and sodium is an electrolyte panel.

The description that best fits a panel of tests for carbon dioxide, potassium, chloride, and sodium is an electrolyte panel or an electrolyte blood test.

An electrolyte panel is a group of blood tests that measure the levels of various electrolytes in the body, including carbon dioxide (CO₂), potassium (K⁺), chloride (Cl⁻), and sodium (Na⁺). These electrolytes play crucial roles in maintaining the body's fluid balance, acid-base balance, and nerve and muscle function.

During an electrolyte panel, a blood sample is collected, and the levels of these electrolytes are measured. The results provide valuable information about the body's electrolyte balance and can help diagnose and monitor conditions such as dehydration, kidney disorders, electrolyte imbalances, and certain metabolic disorders.

In addition to carbon dioxide, potassium, chloride, and sodium, an electrolyte panel may also include tests for other electrolytes such as calcium, magnesium, and phosphate, depending on the specific needs of the patient and the healthcare provider's assessment.

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Answer:

las plantas

Explanation:

Las plantas son los seres vivos capaces de transformar energía luminosa utilizando agua y dióxido de carbono (CO₂) en energía química en forma de moléculas llamadas carbohidratos. El proceso a través del cual realizan esto se denomina fotosíntesis, y para ello requieren un pigmento de color verde denominado clorofila, el cual es necesario para captar la energía luminosa proveniente del Sol.

The principal positively charged ion inside body cells is potassium (K+).

The principal positively charged ion inside body cells is potassium (K+). Potassium is an essential mineral that plays a crucial role in various cellular processes. It is involved in maintaining the electrical potential across cell membranes, regulating fluid balance, and supporting nerve and muscle function.

Potassium ions are actively transported into cells by the sodium-potassium pump, which helps maintain the resting membrane potential and enables the transmission of nerve impulses. The concentration of potassium ions inside cells is higher compared to the extracellular fluid, creating an electrochemical gradient that is vital for cellular processes.

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Potassium ions (K+) serve as the principal positively charged ions inside body cells, playing a vital role in cellular function. They contribute to the resting membrane potential, crucial for nerve and muscle cell activity.

Potassium ions are actively transported into cells, maintaining the balance of electrical charges.

They regulate cellular excitability, enzyme function, and osmotic balance. Additionally, potassium ions participate in signal transmission, facilitating communication between cells.

Their concentration is tightly regulated to ensure proper cell functioning. Imbalances in potassium levels can lead to various health issues.

Adequate intake of potassium-rich foods is essential to maintain optimal cellular processes and overall health.

Potassium ions are vital for maintaining the electrical balance and enabling normal cellular activities within the body.

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