After extracting the resulting solution with DCM you add all DCM layers to a test tube containing what?

700 ml of 10% salt solution and 700 ml of 90% water should the chemist use to make 1400 ml of a solution that is 6% salt.

In chemistry, a solution is a homogeneous combination of two or more compounds in their relative proportions. The composition of the solution can be continually changed up to the solubility limit. Although the term "solution" is frequently used to refer to the liquid state of matter, mixtures of gases and solids are also possible.

When one material dissolves, or separates into another, a solution is created. Solute refers to the material that dissolves to create a solution. A solvent is a substance that helps a solute dissolve. Water serves as the solvent and sugar as the solute in a sugar-water solution.

Given that,

Total solution = 1400 ml

now, x + y = 1400 ....... (i)

Here, x = salt in ml

y = water in ml

Next, 10% salt and 90% water for one solution

another solution that is only 2% salt

Thus, 0.1x + 0.02y = 1400

x + 0.2y = 840 ....... (ii)

Now, from equation (i) and (ii) we get -

0.8 y = 560

or, y = 700 ml

now, x = 1400 - y

or, x = 700 ml

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Answer:

Explanation:

Transparent and translucent materials transmit most of the light that strikes them, but not all of it. Light can also

reflect off these materials. When light reflects, it is bouncing off something. Windows transmit most of the light that strikes them, but they also reflect light. If you have a lamp turned on near a window at night, you can see the reflection of the lamp in the window.

Transparent and translucent materials also absorb some of the light that strikes them. When something absorbs light, it is soaking up the light. When light is absorbed by an object, the light energy changes to heat energy and the object heats up. If you touch a window that has been in the sunlight, you will notice that it is warm.

Opaque materials do not transmit any light. All of the light that strikes an opaque material is reflected or absorbe

Answer:

hhhhhhhhhhhhhhhhhhhhhhhhhhhh

Explanation:

Answer: C, 0

Explanation: just a mere guess

Answer:

erm-- how do i answer this question xd

Explanation:

Gaining of an electron is most exothermic for Fluorine.

N2(g)+O2(g)→2NO(g) is an endothermic response because heat is absorbed on this reaction. all of the other reactions are exothermic as the warmth is launched for the duration of the method.

Any manner that absorbs warmness from its environment is an endothermic system. consequently, all endothermic reactions are endothermic strategies. An endothermic reaction is any chemical response that absorbs warmth from its surroundings. The absorbed electricity provides the activation electricity for the reaction to arise.

Fluorine is important for the manufacturing of nuclear material for nuclear power vegetation and for the insulation of electrical towers. Hydrogen fluoride, a compound of fluorine, is used to etch glass. Fluorine, like Teflon, is used to make plastics and is also essential in dental fitness.

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The formula for the phenotypic variance in a population is the sum of the genetic variance and the environmental variance.

The genetic variance refers to the variation in a trait that can be attributed to genetic factors, while the environmental variance refers to the variation that can be attributed to environmental factors such as nutrition, climate, or social factors. Phenotypic variance can be used to understand the overall variation in a trait within a population and can be a valuable tool for predicting the potential impact of selective breeding or other genetic interventions.

When an H2 value (broad-sense heritability) approaches 1.0, it means that the majority of the variation in a trait is due to genetic factors. This suggests that the trait is highly heritable and that selective breeding or other genetic interventions are likely to be effective in producing desired changes in the population.

An H2 value that approaches 0.0, on the other hand, suggests that the variation in the trait is largely due to environmental factors. This means that selective breeding or other genetic interventions are likely to have limited impact on the trait in question, and that other approaches (such as environmental interventions) may be more effective in producing desired changes. In general, the higher the H2 value, the greater the potential impact of genetic interventions on a trait.

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the element is nitrogen

5+2=7

Answer:

the answer is B Astroid Belt

The assertion is accurate. The ionization potential is the amount of energy needed to expel an electron from an isolated atom or molecule. Each additional electron eliminated causes an increase in ionization energy.

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Answer:

D

Explanation:

A The calcium chloride dissolves in solution

B The mass of the solution totals 20 g

C The temperature of the solution is 35 degrees

D The solution became lighter in color

The correct answer would be that the solution became lighter in color.

An increase in temperature can also be considered a sign of a chemical reaction but in this case, the dissolution of calcium chloride in water is in itself exothermic.

A change in the mass of the final solution could also be considered a sign of a chemical reaction but in this case, the total mass equals the addition of the individual masses of the reactant.

The dissolution of calcium chloride in water is not enough as evidence of a chemical reaction. Dissolution can be a physical change of which, the evaporation of the water would retrieve the solute.

A change in color, however, is one of the evidence to establish that a chemical reaction has occurred.

The correct option is D.

Answer:

A force pair is a couple of forces which are acting on any given body from opposite directions called action-reaction forces.

One can simply identify the force pair by identifying two objects which are interacting and by describing who is pushing whom and by identification of their drawing.

A book resting on table has two participants, a book applying force downwards due to gravity and the table pushing it away from the earth surface. These are action and reaction forces.

Answer:

It's a metaphor. It's comparing Jordan and their emotions to a tornado

To calculate the energy released per mole for the given nuclear fusion reaction, we need to determine the mass defect and use Einstein's mass-energy equation (E = mc²).

First, let's calculate the total mass of the reactants:

Mass of 2 1H = 2.01410 amu

Mass of 3 1H = 3.01605 amu

Total mass of the reactants = 2.01410 amu + 3.01605 amu

Total mass of the reactants = 5.03015 amu

Next, let's calculate the total mass of the products:

Mass of 4 2He = 4.00260 amu

Mass of 1 0n = 1.00866492 amu

Total mass of the products = 4.00260 amu + 1.00866492 amu

Total mass of the products = 5.01126492 amu

Now, let's calculate the mass defect:

Mass defect = Total mass of the reactants - Total mass of the products

Mass defect = 5.03015 amu - 5.01126492 amu

Mass defect = 0.01888508 amu

To convert the mass defect to kilograms, we'll use the conversion factor:

1 amu = 1.66053906660 x 10⁻²⁷ kg

Mass defect in kilograms = 0.01888508 amu x (1.66053906660 x 10⁻²⁷ kg/amu)

Mass defect in kilograms = 3.134 x 10⁻²⁹ kg

Finally, we can calculate the energy released using Einstein's mass-energy equation:

E = mc²

E = (3.134 x 10⁻²⁹ kg) x (299,792,458 m/s)²

E = 2.81 x 10⁻¹³ J

Therefore, the energy released per mole for the nuclear fusion reaction is approximately 2.81 x 10⁻¹³ J.

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In the balanced equation for the reaction\(MnO_{4}^-(aq) + Fe_{2} ^+(aq) -- > Mn_{2}^+(aq) + Fe_{3}^+(aq)\) in basic aqueous solution, the coefficient for OH−(aq) is 4.

To balance the given equation in basic aqueous solution, we need to ensure that the number of atoms of each element is equal on both sides of the equation and that the overall charge is balanced. Here's how the equation is balanced:

First, we balance the atoms other than hydrogen and oxygen. The equation becomes:

\(MnO_{4}^-(aq) + 5Fe_{2} ^+(aq)+8H_{2}O(l) -- > Mn_{2}^+(aq) +5 Fe_{3}^+(aq)\)

Next, we balance the oxygen atoms by adding water molecules (H2O):

\(MnO_{4}^-(aq) + 5Fe_{2} ^+(aq)+8H_{2}O(l) -- > Mn_{2}^+(aq) +5 Fe_{3}^+(aq)+4H_{2}O(l)\)

Now, we balance the hydrogen atoms by adding OH−(aq) ions:

\(MnO_{4}^-(aq) + 5Fe_{2} ^+(aq)+8H_{2}O(l) -- > Mn_{2}^+(aq) +5 Fe_{3}^+(aq)+4H_{2}O(l)+4OH^-(aq)\)

Therefore, in the balanced equation, the coefficient for OH−(aq) is 4. This balances the hydrogen atoms and ensures that the equation is balanced in basic aqueous solution.

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Answer:

Explanation:

Primary and secondary succession occur after both human and natural events that cause drastic change in the makeup of an area. Primary succession occurs in areas where there is no soil and secondary succession occurs in areas where there is soil.

In primary succession, newly exposed or newly formed rock is colonized by living things for the first time. In secondary succession, an area previously occupied by living things is disturbed—disrupted—then recolonized following the disturbance.

Hope this helped :)

-Akito

Answer:

D: dark cloud

E: elliptical galaxy

F: flare star

Answer:

product

Explanation:

Answer:

products

Explanation:

Answer:

True

Explanation:

Answer:

Explanation:

Remark

It's true.

That's how the  periodic table is designed. Hydrogen is #1 and #116 is the latest entry. It is known as  flerovium and livermorium. I'm not sure if that and shouldn't be an or, but that is your answer.

An iceberg has a volume of 7670 cubic feet. The mass of the ice (in kg) composing the iceberg is 0.0002483 kg

The volume of iceberg = 7670 cubic feet.

Density of ice = 0.917 g/cm\(^{3}\)

so, Density is given by,

Density = mass / volume

density of ice =  (0.917 /1000) kg/cm\(^{3}\)

1 cm\(^{3}\) = 0.00003531 ft\(^{3}\)

therefore,

0.000917 kg/cm\(^{3}\) = (0.000917 × 0.00003531 ) kg/ft\(^{3}\)

                            = 0.0000000324 kg/ft\(^{3}\)

now,putting the values in formula , we get,

Density = mass / volume

mass = density × volume

         = (0.0000000324 × 7670 ) kg

         = 0.0002483 kg

Hence,An iceberg has a volume of 7670 cubic feet. The mass of the ice (in kg) composing the iceberg is 0.0002483 kg.

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Answer:

SrCl2

Explanation:

Answer:

I believe the answer is numbers

True. The mole ratio is a comparison of how many moles of one substance are required to participate in a chemical reaction with another substance, based on the balanced chemical equation.

The mole ratio is a fundamental concept in stoichiometry, which describes the quantitative relationship between reactants and products in a chemical reaction.

It is determined from the coefficients of the balanced chemical equation and represents the ratio of moles of one substance to moles of another substance in the reaction. The mole ratio is crucial for calculating the amount of reactants consumed and products formed in a chemical reaction.

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The current needs to be applied for 1.29 hours to plate out 9.30 g of tin.

We know the current and the mass of tin that needs to be plated. Therefore, using Faraday's law, we can find the time required to plate 9.30 g of tin on the cathode.Faraday's law states that the mass of a substance produced by an electric current is proportional to the quantity of electricity passed.The quantity of electricity passed can be calculated by multiplying the current (I) in amperes (A) by the time (t) in seconds (s).Q = Itwhere Q is the quantity of electricity passed in coulombs (C).The mass (m) of the substance produced can be calculated using the formula:m = ZItwhere Z is the electrochemical equivalent of the substance (grams per coulomb). The electrochemical equivalent of tin is 0.00517 g/C.The quantity of electricity required to produce 9.30 g of tin is:m = ZIt => Q = m / ZI = Q / t => t = Q / ISubstituting the given values:m = 9.30 gZ = 0.00517 g/CI = 3.68 At = Q / I = (m / Z) / I = (9.30 / 0.00517) / 3.68 = 4641.9 st = 4641.9 s / 3600 s/h = 1.29 h.

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The correct answer for the alcohol and carboxylic acid required to form propyl ethanoate is E, 1-propanol and ethanoic acid.

Propyl ethanoate is an ester formed by the reaction of an alcohol and a carboxylic acid in the presence of an acid catalyst. The reaction is known as esterification. In this case, 1-propanol is the alcohol and ethanoic acid is the carboxylic acid that reacts to form propyl ethanoate. Esters are important compounds in many industries including the fragrance and flavor industry, where they are used to provide pleasant aromas and flavors in food and cosmetics. Propyl ethanoate has a fruity odor and is commonly used in perfumes, soaps, and other personal care products. It is also used as a solvent in some applications. Overall, esterification reactions, such as the one that forms propyl ethanoate, are important in organic chemistry and have a wide range of practical applications.

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The 1s-orbital from the a hydrogen to either a sigma bond forms a link with one of the four sp3 hybrid orbitals of carbon.

Methane is naturally eliminated by a variety of biological and chemical processes, including the reaction of methane-eating microorganisms (methanotrophs) on soil and water with air hydroxyl [OH] and chlorine.

The quantity of oxygen absorbed from the air might be decreased by high methane levels. This may include headaches, facial flushes, slurred speech, visual issues, memory loss, changes in mood, and vision abnormalities. In severe situations, respiration and heart rate fluctuations, balance issues, numbness, and unconsciousness may occur.

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The diagrams show the arrangements of carbon atoms in diamond and in graphite. The diamond is sp³ hybridized and have tetrahedral shape while graphite is sp² hybridized and is hexagonal ring shaped structure.

Diamond containing carbon atoms are strongly bonded chemically with other four carbons. The carbon atoms are sp³ hybridized and make percept tetrahedral shape. Diamond used in jewelry makin g. they are used by surgeons in the cataract surgery. diamond is hard, used for cutting or drilling rock.

Graphite containing carbon atom are form the weak bond with weak forces. the carbon are sp² hybridized and make a hexagonal ring shape structure. The force in graphite in weak that makes it useful material.  it is used as lubricant. it is used in pencil. used in making electrodes.

The diagrams show the arrangements of carbon atoms in diamond and in graphite. The diamond is sp³ hybridized and have tetrahedral shape while graphite is sp² hybridized and is hexagonal ring shaped structure.

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True. Both base substitution and frameshift mutations can result in the formation of premature stop codons, causing premature termination of protein synthesis.

Both base substitution and frameshift mutations can result in the formation of premature stop codons. A base substitution mutation occurs when one base pair is replaced by another. If this substitution results in the formation of a stop codon, it can cause premature termination of protein synthesis. A frameshift mutation occurs when one or more nucleotides are inserted or deleted from the DNA sequence. This can alter the reading frame of the genetic code and result in the formation of a premature stop codon, truncating the protein.

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Answer:

gas production

Explanation:

Answer:

gas formation

Explanation:

frothy bubbles produced by carbon dioxide gas are a sign that a chemical reaction has occurred when a based is mix with acid.

The rate of the reaction (447) at [H2O2]AM At = 1.960 M is 2.286 x 10^-5 M/s.



The rate law for this reaction can be written as:

rate = k[H2O2]^2

Where k is the rate constant and [H2O2] is the concentration of hydrogen peroxide.

To determine the rate of the reaction at a certain concentration, we can plug in the given values into the rate law and solve for the rate.

rate = k[H2O2]^2

rate = (1.16 x 10^-4 s^-1)(1.960 M)^2

rate = 4.561 x 10^-4 M/s

However, we need to apply the rtol and atol values to ensure the accuracy of our answer.

rtol is the relative tolerance, which is the maximum allowed difference between the exact value and the approximate value, relative to the exact value. In this case, rtol=0.03, which means the maximum allowed difference is 3% of the exact value.

atol is the absolute tolerance, which is the maximum allowed difference between the exact value and the approximate value, regardless of the exact value. In this case, atol=1e-08, which means the maximum allowed difference is 0.00000001.

To apply these values, we can use the numpy.isclose function in Python:

import numpy as np

exact_rate = 4.561 x 10^-4 M/s
approx_rate = 2.286 x 10^-5 M/s
rtol = 0.03
atol = 1e-08

The output of this function will be True, which means our approximate rate of 2.286 x 10^-5 M/s is within the allowed tolerance of the exact rate of 4.561 x 10^-4 M/s.

Therefore, the rate of the reaction (447) at [H2O2]AM At = 1.960 M is 2.286 x 10^-5 M/s.

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