What weight of Y would be removed from water (the original solution with the original amount) with two successive extractions with 70-mL portions each of methylene chloride

Answer:

"the temperature at which a liquid boils and turns to vapor." - Google Dictionary

Answer:

The difference between an innate behavior and a learned one is that innate behaviors are those an animal will engage in from birth without any intervention. Learned behavior is something an animal discovers through trial, error and observation.

Explanation:

The pH of a 2.0x10⁻³ M solution of ascorbic acid (H₂C₆H₆O₆) is approximately 2.16, and the concentration of [C₆H₆O₆⁻²] is approximately 1.6x10⁻¹² M.

To calculate the pH, first determine the concentration of H⁺ ions using the Ka₁ value. Given the initial concentration of ascorbic acid (H₂C₆H₆O₆), use the expression Ka₁ = [H⁺][HC₆H₆O₆⁻]/[H₂C₆H₆O₆].

Make the assumption that the change in concentration of H₂C₆H₆O₆ is equal to the concentration of H⁺ ions formed. After solving for [H⁺], use the formula pH = -log[H⁺] to find the pH.

To find [C₆H₆O₆⁻²], use the Ka₂ value and the calculated concentration of HC₆H₆O₆⁻ ions. The expression is Ka₂ = [H⁺][C₆H₆O₆⁻²]/[HC₆H₆O₆⁻]. Since the Ka₂ value is small, assume that the change in HC₆H₆O₆⁻ concentration is negligible. Solve for [C₆H₆O₆⁻²] using the given Ka₂ value and the calculated HC₆H₆O₆⁻ concentration.

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All are three factors are affected by an increase in reactant concentration.

a. The number of reactant particles in a given volume

b. The number of reactant collisions

c. The rate of reaction

The number of collisions over time determines the reaction rate; when the concentration of either reactant is increased, more collisions occur, leading to more successful collisions and reaction rate. Collisions multiply as temperature rises. The pace of a reaction will increase when a reactant's concentration rises because more reactants will collide more rate of reaction.

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Explanation:

soil pollution

composting

air pollution

gas absorbtion

water pollution

settling

Answer:

We can use the ideal gas law to solve for the number of moles of gas:

PV = nRT

where P is pressure, V is volume, n is the number of moles, R is the gas constant, and T is temperature in Kelvin.

Plugging in the given values:

(1.35 atm)(25 L) = n(0.0821 L·atm/mol·K)(300 K)

n = (1.35 atm)(25 L) / (0.0821 L·atm/mol·K)(300 K)

n = 1.29 mol

Therefore, there are 1.29 moles of gas in the container.

The molar mass of Mg(OH)2 is 58.3 g mol−1.

The relative atomic mass of an element indicates its mass compared to the mass of atoms of other elements. Carbon has a relative atomic mass of 12 and magnesium has a relative atomic mass of 24. This means that each magnesium atom has twice the mass of a carbon atom. Atomic weights related to 1/12th the mass of a carbon atom are called relative atomic masses.

It is called the relative atomic mass because it compares the atomic mass to 1/12 the mass of a carbon atom. Relative mass is the average atomic mass of all isotopes present expressed as a percentage, and absolute mass is the sum of proton number and neutron mass. As the speed of an object approaches the speed of light, its relativistic mass m becomes infinite.

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The volume of gas when the pressure goes from 1.0 atm to 1.4 atm is 8,571.43 L.

When a car is driven into the river, it will implode due to the change in pressure. We are to calculate the volume of gas when the pressure goes from 1.0 atm to 1.4 atm if the internal volume of the car is 12,000 L.In order to solve the problem, we will use the combined gas law equation. The equation is given as follows;P1V1/T1 = P2V2/T2where P1 is the initial pressure, V1 is the initial volume, T1 is the initial temperature, P2 is the final pressure, V2 is the final volume, and T2 is the final temperature.We will assume that the initial temperature and final temperature are constant, and therefore, we can cancel them from the equation. Thus, the equation becomes;P1V1 = P2V2We can rearrange the equation to solve for V2 as follows;V2 = (P1V1)/P2Substituting the given values, we get;V2 = (1.0 atm * 12,000 L)/1.4 atmV2 = 8,571.43 L.

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Answer:

Supercontinent is a single landmass formed by the combination of many Earth's continental blocks or cratons.

Supercontinents form and split up every 400 or 500 million years and the last supercontinent was formed 300 million years ago, so it is possible that any of the modern continents will combine together to form a new supercontinent in future.

Answer:

Yes, modern continents could recombine to form a new supercontinent. Because the continents move at different rates and in different directions, it’s likely that in the future, continents will collide and join together.

Explanation: Edmentum's EXACT ANSWER SO DO NOT COPY!  Rewrite it in your own words.

The gas in a 250.0 mL piston experiences a change in pressure from 1.00 atm to 4.90 atm. 56.2 ml is the new volume (in mL) assuming the moles of gas and temperature are held constant.

Boyle's law states that at a given temperature, the volume of a gas and its pressure are inversely proportional.

Robert A. Boyle discovered the law in 1662, which states that at a constant temperature, the volume of a gas is inversely proportional to the pressure exerted by the gas.

Given:

Initial volume (V₁) = 250 mL

Initial pressure (P₁) = 1.00 atm

Final volume (V₂) = ?

Final pressure (P₂) = 4.45 atm

Assuming the gas has an ideal behavior, we can find the final volume by using Boyle's law as follows:

P₁ × V₁ = P₂ × V₂

V₂ = P₁ × V₁/P₂

V₂ = 1.00 atm × 250 mL / 4.45 atm

V₂ = 56.2 ml

Thus, 56.2 ml  is the new volume (in mL) assuming the moles of gas and temperature are held constant.

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In this 60 mL solution, there are 2.25 x 10⁻⁴ moles of I- present at equilibrium.

To determine the number of moles of I- present in the solution, we need to use the formula:

moles = concentration x volume

First, we need to convert the given concentration from molarity (M) to moles per liter (mol/L). We can do this by multiplying the given concentration by the conversion factor of 1 liter/1000 mL:

3.75 x 10^-3 M x 1 L/1000 mL = 3.75 x 10^-6 mol/mL

Now we can use the formula to find the number of moles present in the entire solution:

moles = 3.75 x 10^-6 mol/mL x 60 mL = 2.25 x 10^-4 mol

Therefore, there are 2.25 x 10^-4 moles of I- present in the solution with a total volume of 60 mL.

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When \(CO_{2}\) and \(H_{2} CO_{3}\) are both horizontal lines, the rate of the forward reaction is the same as the rate of the reverse reaction. The reaction is occurring at equilibrium, with no net change in the concentrations of reactants and products over time.

When the concentration of carbon dioxide \(CO_{2}\) and the concentration of carbonic acid \(H_{2} CO_{3}\) are both horizontal lines, it indicates that their concentrations remain constant over time. In such a scenario, the rate of the forward reaction is the same as the rate of the reverse reaction. A horizontal line on a concentration-time graph suggests that the concentrations of the reactants and products are not changing, implying that the reaction has reached equilibrium. At equilibrium, the rate of the forward reaction equals the rate of the reverse reaction. This is a fundamental principle of chemical equilibrium, described by the principle of microscopic reversibility.

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The concentration (molarity) of dissolved nitrogen would be: 4.9 x 10^(-4) M.

This is calculated by using the Henry's law which states that the solubility of a gas in a liquid is directly proportional to the partial pressure of the gas above the liquid. C = kP where C is the concentration of the gas in the liquid, k is the solubility constant of the gas in the liquid and P is the partial pressure of the gas above the liquid. So,

C = kP = (6.8 x 10^(-4) mol/L) x (0.76 atm) = 5.2 x 10^(-4) M.

Molarity (M) is a unit of concentration that expresses the number of moles of solute present in one liter of solution. It is a commonly used unit in chemistry and is defined as the ratio of the number of moles of solute to the number of liters of solvent. Molarity is represented by the symbol "M" and is typically used to express the concentration of a solution in terms of the number of moles of solute per liter of solvent.

For example, a solution that contains 1 mole of solute dissolved in 1 liter of solvent would have a molarity of 1 M. Similarly, a solution that contains 0.5 moles of solute dissolved in 1 liter of solvent would have a molarity of 0.5 M.

Molarity is an intensive property, meaning that it does not depend on the amount of solution present, unlike mass-based units such as percent weight/volume or parts per million.

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The complete question is:

The solubility of nitrogen gas at 25 degrees C and 1 atm is 6.8 x 10^(-4) mol/L. If the partial pressure of nitrogen gas in air is 0.76 atm, what is the concentration (molarity) of dissolved nitrogen?

5.2 x 10^(-4) M

1.1 x 10^(-5) M

4.9 x 10^(-4) M

3.8 x 10^(-4) M

6.8 x 10^(-4) M

Calculate the molar solubility (concentration) of dissolved nitrogen at 0.76 atm by substituting the known values into equation (I). As a result, the amount of dissolved nitrogen is 5.2104mol/L or 5.210 4 m o l/L.

Henry's law states that a gas's solubility in a liquid is proportionate to the gas's partial pressure above the liquid. A specific gas's proportionality constant in a specific solvent is represented by the solubility constant, or kH. The concentration of dissolved nitrogen in a solution may be estimated using two variables: the partial pressure of nitrogen gas, PN2, and the solubility constant for nitrogen in the solvent, kH. For example, PN2 = 0.76 atm for nitrogen gas and kH = 10-4 mol/l/atm for water. PN2 = 10-4 mol/l/atm * 0.76 atm * kH = 7.6 x 10-4 mol/l, where CN2 = kH * PN2 As a result, the solution contains 7.6 x 10-4 mol/l of dissolved nitrogen.

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Answer:

a free-falling object is an object that is falling under the sole influence of gravity. That is to say that any object that is moving and being acted upon only be the force of gravity is said to be "in a state of free fall." Such an object will experience a downward acceleration of 9.8 m/s/s.

Answer:

1. Crush the sugar into powder.

2. Heat the water.

3. Dissolve it by stirring continuously

Explanation:

1. Crushing the sugar into powder increases surface area. So it increases the changes of dissolving

2. Heating the water increases the capacity of water to dissolve sugar.

3. Stirring continuously increases randomness of particles so eases mixing up thus increasing dissolving tendency.

A diffuse reflection is when light hits an uneven surface and reflects back in different directions. The correct option is D.

It is known as diffuse reflection when light, other waves, or particles are reflected from a surface so that rays incident on it are scattered at multiple angles rather than just one, as in the case of specular reflection.

When light reflects off a rough surface, it causes a blurred or nonexistent image, known as diffuse reflection. The law of reflection states that the angle at which light rays bounce off a surface equals the angle at which the incident rays contact the surface.

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Answer:

Explanation:

1).  Ca(NO₃)₂ + KI → CaI + K(NO₃)₂

    This equation is incorrect.

    When Ca⁺⁺ reacts with I⁻, final product is CaI₂

    And when K⁺ react with NO₃⁻, final product is KNO₃

    Hence the equation will be,

    Ca(NO₃)₂ + KI → CaI₂ + KNO₃

    Now we have to balance this equation.

     Ca(NO₃)₂ + 2KI → CaI₂ + KNO₃

                          ↓

     Ca(NO₃)₂ + 2KI → CaI₂ + 2KNO₃

2). Ca(NO₃)₂ + KOH → CaOH + K(NO₃)₂

    This equation is incorrect,

    Since the reaction of Ca⁺⁺ with OH⁻ gives the final product     Ca(OH)₂

    And final product of K⁺ and NO₃⁻ is KNO₃

    Therefore, the equation will be,

    Ca(NO₃)₂ + KOH → Ca(OH)₂ + KNO₃

    Now we will balance this equation by changing the coefficients of the      molecules until the number of atoms on both the sides become equal.

    Ca(NO₃)₂ + KOH → Ca(OH)₂ + 2KNO₃

                                ↓

     Ca(NO₃)₂ + 2KOH → Ca(OH)₂ + 2KNO₃

3). Ca(NO₃)₂ + Na₂C₂O₄ → CaC₂O₄ + 2Na(NO₃)₂

    This equation is incorrect,

    Since the reaction of Na⁺ and NO₃⁻ gives the final product    NaNO₃.

    Therefore, the correct equation will be,

    Ca(NO₃)₂ + Na₂C₂O₄ → CaC₂O₄ + 2NaNO₃

     This equation is in the balanced form.

The number of moles of helium occupying a volume of 5.00 L at 227.0°C and 5.00 atm is approximately 0.609 mol. Hence, the correct option is: c)

How can we calculate the number of moles of helium?

To calculate the number of moles, we can use the ideal gas law equation: PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature in Kelvin.

To determine the number of moles, we can use the ideal gas law equation:

PV = nRT

where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature in Kelvin.

Given:

P = 5.00 atm

V = 5.00 L

T = 227.0°C = (227.0 + 273) K = 500 K (converting to Kelvin)

Now, we can rearrange the ideal gas law equation to solve for the number of moles:

n = (PV) / (RT)

Substituting the given values into the equation:

n = (5.00 atm * 5.00 L) / (0.0821 atm·L/(mol·K) * 500 K)

Calculating this expression gives the number of moles, which is approximately 0.609 mol.

Therefore, the correct option is c) 0.609 mol.

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Explanation:

The flame test is used to visually determine the identity of an unknown metal or metalloid ion based on the characteristic color the salt turns the flame of a Bunsen burner. The heat of the flame excites the electrons of the metals ions, causing them to emit visible light

Engineers in Russia invented a new way to create colorful art with constructive laser art.

Modern industrial life and urban space were intended to be reflected in constructivist art. It produces art using industrial manufacturing techniques and inexpensive materials.

The idea behind constructivism was to replace conventional art by emphasizing engineering rather than painting. Russia started a colorful way to create new art.

Thus, Russian engineers developed a fresh method for producing vivid artwork using constructive laser art.

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An elementary step is characterized by its molecularity which is equal to the number of reactant particles in the step

A one-step reaction is referred to as an elementary reaction. The coefficients of the reactants in the balanced equation can be used to get the rate law for an elementary reaction. For instance, rate = k[A]2[B] is the rate rule for the elementary reaction 2A + B products.

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Answer:

Local Winds

Explanation:

Answer: I think it would be D. Local winds

Explanation: Sorry if I am wrong.

Hope this helps :)

Answer: all I know it’s not -31.5 for ppl taking the k12 test

Explanation: I took the test

Answer:

its 69.9

Explanation:

yw

Answer:

43

a) 6.730 x 10^-4

b) 5.0 x 10^4

c) 3.010 x 10^-6  

44

a) 7050. g

b) 40000500. mg

c) 2350.0 mL

Answer:

A.Scientists use genes to explain why evolution happens.

Explanation:

:)

Electron changes their spin to match the spin of proton in the nucleus. Hence, option C is correct.

Wavelength is the distance between identical points (adjacent crests) in the adjacent cycles of a waveform signal propagated in space or along a wire.

21-centimetre radiation, electromagnetic radiation of radio wavelength emitted by cold, neutral, interstellar hydrogen atoms. The hydrogen atom is composed of a positively charged particle, the proton, and a negatively charged particle, the electron. These particles have some intrinsic angular momentum called spin.

Hence, option C is correct.

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Answer: B.

Explanation:

Trust me already took the quiz on it its B.

Answer:

Yes its B

Explanation:

The organism in this tutorial that can get its nitrogen from nitrogen fixation is cyanobacteria. Cyanobacteria are known for their ability to convert atmospheric nitrogen gas into ammonia through nitrogen fixation.

This process allows cyanobacteria to grow even if there is a lack of available forms of nitrogen in their environment. In fact, cyanobacteria play a crucial role in many ecosystems by providing a source of fixed nitrogen that can be used by other organisms. While some other organisms, such as certain types of bacteria, also have the ability to perform nitrogen fixation, cyanobacteria are often considered the most important nitrogen fixers in aquatic ecosystems. Overall, cyanobacteria's unique ability to fix nitrogen makes them an important component of many food webs and ecosystems.

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