a mixture of h2(g) and o2(g) is placed in a container as represented above. the h2(g) and o2(g) react to form h2o(g). which of the following best represents the container after the reaction has gone to completion?

There is variation in the masses of 1.0-mole samples of different substances.

To have enough of the particles for chemists to work with in the lab, a lot (6.02 1023) of them are needed. A mole of the any particle will not weigh or have the same mass as a mole of another particle, just as a dozen donuts, flowers, and eggs did not have the same mass or weight.

Additionally, molar mass provides the mass of the a mole of a specific substance, which is the primary distinction between the two. Molecular weight, on the other hand, refers to a substance's molecule's mass. Although the terms "molar mass" and "molar mass units" are not the same

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Dmitri Mendeleev and Lothar Meyer independently developed the periodic law in 1869. Mendeleev developed the first periodic table, which was quickly followed by Meyer.

The periodic table, also known as the periodic table of the elements, is an arrangement of chemical elements in rows and columns. It is widely used in chemistry, physics, and other sciences, and is widely regarded as a chemistry icon.

Meyer is best known for his contribution to the periodic table of elements. He observed, as did John A. R. Newlands in England, that arranging the elements in the order of their atomic weights resulted in groups of similar chemical and physical properties repeated at regular intervals.

Thus, Mendeleev developed the first periodic table, which was quickly followed by Meyer.

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1. The mass fraction of sodium carbonate in solution A and solution B are  0.05 and 0.15 respectively.

2. The mass fraction of sodium sulfate is 0.696

3. The equations of the interaction between the strontium chloride and the given solutions are:

The mass of sodium carbonate that will release 5.82 L and 4.70 L of carbon dioxide gas when reacted with sulfuric acid is determined from the equation of reaction below:

Na₂CO₃ + H₂SO₄ ---> Na₂SO₄ + H₂O + CO₂

1 mole or 106 g of Na₂CO₃ produces 1 mole or 22.4 L of CO₂

5.82 L of CO₂ will be produced by 5.82/22.4 * 106 g = 27.54 g

4.70 L of CO₂ will be produced by 4.70/22.4 * 106 g = 22.24 g

The mass fractions are calculated as follows:

Let the mass fraction of sodium carbonate in solution A and solution B be x and y respectively

x * 100 g + y * 150 = 27.54 g

100x + 150 y = 27.54 g --- (1)

x + 1.5 y = 0.2754

x * 150 + y * 100 = 22.24 g

150x + 100y = 22.24 ---- (2)

1.5x + y = 0.2224

solving for y in Eqn 1;

x = 0.2754 - 1.5y --- (3)

substitute (3) in (2)

1.5(0.2754 - 1.5y) + y = 0.2224

0.4131 - 2.25y + y = 0.2224

-1.25y = -0.1907

y = 0.15

x = 0.2754 - 1.50 * 0.15

x = 0.05

2. The molarity of 20% (W/W) solution of sulphuric acid is 2.55 M.

From the equation of the reaction, 1 mole sulfuric acid solution reacts with 1 mole sodium carbonate solution to form 1 mole sodium sulfate

Molar mass of sodium sulfate = 142 g/mol

Molar mass of H₂O = 18 g/mol

Molar mass of CO₂ = 44 g/mol

Total mass = 204 g

Mass fraction of sodium sulfate = 142/204

Mass fraction of sodium sulfate = 0.696

3. The equation of the interaction between the strontium chloride solution and the original solution of sodium carbonate is:

SrCl₂ + Na₂CO₃ ----> 2 NaCl (aq) + SrCO₃

The equation of the interaction between the strontium chloride solution and the solution obtained in the reaction between sodium carbonate and sulfuric acid is:

SrCl₂ + Na₂SO₄ ---> SrSO₄ + NaCl

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The pH of the given solution is 11.98. Thus the concentration of H+ ions is 1.0 × 10⁻¹² M.

pH of a solution is the negative logarithm of its H+ ions concentration. Similarly pOH is the negative logarithm of its OH- ion concentration. The sum of pH and pOH of an aqueous solution is always 14.

Given that [OH-] = 9.7 × 10⁻³ M

pOH = - log (9.7 × 10⁻³ M) = 2.01.

pH = 14 - POH = 14 -2.01 = 11.98.

From the pH value, the H+ concentration can be calculated as follows:

pH = -log [H+]

[H+] = antilog (-pH)

       = 1.04 × 10⁻¹² M

Therefore, the H+ ion concentration of the solution is 1.04 × 10⁻¹² M.

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True. The amount of carbon-14 remains constant in equilibrium and is produced in the upper atmosphere.

Carbon-14 is a long-lived radioactive carbon isotope formed by the collision of neutrons and nitrogen atoms in the atmosphere when cosmic radiation occurs.

Organisms during their lifetime will absorb carbon-14, carbon-14 is a carbon that easily bonds with other atoms to help process reactions in the body. As in plants, carbon-14 acts as carbon dioxide, which is the raw material for photosynthesis. Carbon-14 is also decaying and the amount will be replaced when living things breathe and eat. The process of absorption of carbon-14 in living things will stop when these living things die, and the amount of carbon-14 in their bodies will decrease.

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Rate=k[NO]2[O2]  of the following is the rate law for the overall reaction that is consistent with the proposed mechanism.

A simple set of reactions known as elementary steps or elementary reactions illustrate the progression of a reaction now at molecular level. The series of simple steps that together make up a full chemical reaction is known as a reaction mechanism.

A reaction that requires two or more basic stages is considered to be multistep or complex. An intermediary is a chemical creature that is created in one basic stage of either a reaction and eliminated in the following. In a reaction system, the step that moves the slowest is the rate-determining step.

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The concentration of potassium permanganate solution is 0.015 mM.

Use the equation given below to calculate the molarity of solution,

Mili molarity of the solution = [Mili moles of solute × 1000]/[Volume of solution in mL]

Given,

Moles of the solute = 4.6 × 10⁻³ mmol

Volume of the solution = 300 mL

Substituting the values we get,

Mili molarity of the solution = [Mili moles of solute × 1000]/[Volume of solution in mL]

Mili molarity of the solution = [4.6 × 10⁻³ × 1000]/300 = 0.015 mM

Hence the mili molarity of the solution of potassium permanganate is 0.015 mM.

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Answer:

Explanation:

O Potassium and Bromine are in the same period.

The periodic table is a chart of all the known elements arranged according to their atomic structure. Elements in the same period are in the same row of the periodic table and have similar chemical properties because they have the same number of electron shells.

O Nitrogen and Bismuth are not in the same period. Nitrogen is in period 2 and bismuth is in period 6.

O Silver and Calcium are not in the same period. Silver is in period 5 and calcium is in period 4.

O Fluorine and Chlorine are in the same period. They are both in period 2.

Using the elements' positions on the periodic table is a general tool to predict probable bond type.  The exact prediction of bond type can be made using electronegativity values.

The bond between S and F is polar covalent. The electronegativity of S is 2.58 while the electronegativity of F is 3.98. The electronegativity difference between the two atoms is 1.40. When the electronegativity difference is between 0.5 to 1.6, we can say that, the bond formed between the two atoms as polar covalent.

Cl and Cl. A non-polar covalent bond , where the two atoms sharing electrons have very similar electronegativities so that the electrons are equally shared.

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Answer:

Image result for he first thing, PH, is really influenced by the way the pollutants are discarded, for example, if a factory decides to throw their pollutants inside a very good and not polluted river, this river will change how it chemically works, and through that, the PH will change, it can turn into a more acid or basic river, depending on the components that were thrown there. I learned from conducting this lab that every act of the human race affects the environment as a whole, and the main thing to pay attention to in this experiment is that, everything is linked to one another in some way.

Even small changes in pH can shift community composition in streams. This is because pH alters the chemical state of many pollutants (e.g., copper, ammonia), changing their solubility, transport and bioavailability. This can increase exposure to and toxicity of metals and nutrients to aquatic plants and animals

Explanation:

The maximum wavelength of light needed to break the amide bond is 268 nm



First' permit's calculate the average bond power:
(276 + 615)/2 = 445.5 kJ/mol

with the aid of Avogadro's no 1 mol = 6.02x10²³ molecule, then the electricity important to break the amide bond in 1 molecule is:

E = 445.5/6.02x10²³ = 7.4x10⁻²² kJ = 7.4x10⁻¹⁹ J

So, the wavelength of light (λ) can be calculated by means of:

E= h*c/λ

wherein h is the Planck's constant ent (6.626x10⁻³⁴ J.s), and c is the mild velocity (three.0x10⁸ m/s).

7.4x10⁻¹⁹ = 6.626x10⁻³⁴ * three.0x10⁸/λ

λ = 2.68x10⁻⁷ m

λ = 268 nm

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Answer:

Explanation:

Color is caused by the way light bounces off of objects. Certain objects only reflect certain frequencies of light, which is what makes up color. For example, when the sun shines on earth (which, the sun shines white light, which is made of all colors), lets say it reflects off of an apple tree in a field. The tree's leaves will reflect green light because of the chloraphyll inside its cells. However, if the light reflects off of one of the apples on the tree, red light is seen because of the nutrients inside of the skin of the apple. In art, color is very important, so people have found ways to use paint (which is in all colors) to essentially mimic the effect that light has on the real world.

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The students average speed of the student is 3.5 km/h.

Speed is known to be calculated as the ratio of distance traveled and time traveled. It is a scalar quantity since it only has magnitude and not direction. Velocity is the percentage of time an object moves along a path, and Velocity is expressed as the rate and direction of an object's movement.

The mathematical calculation of speed is relatively simple, calculating the average velocity of an object by dividing the distance traveled by the time it took the object to travel that distance. Velocity, on the other hand, is mathematically complex and can be calculated in different ways depending on what information is available about the object's motion.

Speed = Distance/Time

Speed = 7km/2h

Speed = 3.5 km/h

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Answer:

Don't make a bomb hahaha, anyway here's your guide

Explanation:

There are several ways to make a chemical change to water, which is a molecule made up of two hydrogen atoms and one oxygen atom (H2O). Some examples of chemical changes that can be made to water include:

It's important to note that these chemical changes to water involve the formation of new chemical compounds, which is a hallmark of a chemical change. Physical changes, on the other hand, do not involve the formation of new compounds, but rather a change in the physical properties of a substance, such as its size, shape, or state of matter.

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The entropy increases because the system becomes more disorderly.

What is thermodynamic process?

Hence, The entropy increases because the system becomes more disorderly.

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The first undiscovered remedy is barium chloride.

Option b is correct.

Explanation and Response: The flame of potassium, often known as a lilac flame, is violet or light purple in color. Remember that different elements can create similar colors, thus flame tests are not always reliable.

Avoid contact with mucous membranes, eyes, and skin as copper(II) chloride is mildly poisonous. Body tissue irritant lithium chloride is used. In order to prevent trashcan fires, rinse the wooden splints before throwing them in the trash. Put on chemical-resistant gloves, an apron, splash goggles, and other protective gear.

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A stock solution can best be described as a concentrated solution of known exact concentration that is diluted for future use in the laboratory. You can choose not to prepare a stock solution, but doing so can streamline your operations while saving significant time and resources in the process.

A 10X stock solution contains 10-fold concentrations of all solutes compared to the working solution, which is considered a 1X solution. Therefore, the 10x solution should be diluted 10x to get the final working solution.

C₁V₁ = C₂V₂

Where,

C₁ = 10 X

C₂ = 1 X

V₁ = Amount of TAE stock solution

V₂ = 30.0 mL

Now, substitute the values:

10 V₁ = 1 × 30.0V₁ = 30/10

V₁ = 3 ml

Hence, for a 30 ml 1 X solution; 3 ml of 10 X TAE solution and 27 ml of deionized water are mixed.

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"The goal of this study is to compare the grades of students who attend office hours and those who do not," is an example of a qualitative research question.

In order to examine or characterize occurrences rather than offer a clean nomothetic explanation, qualitative research questions are frequently more wide and imprecisely phrased. Although many of them do, they may just include one concept. Example: ''What is it like to grow up in a rural setting with only one parent?''

Typically, a study's or an industry report's quantitative research questions serve as the introduction. It is crucial that the research questions employed in quantitative business research enable respondents to provide clear responses. Example: ''How many texts do you send per day?''

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According to the given statement Catalytic hydrogenation with Lindlar catalyst, Epoxidation and Acetylide Substitution.

The fabrication industry uses acetylene for many major applications. It is the only fuel gas that can be used for welding. It is also ideal for brazing, cutting, flame gouging, spot heating, hardening, texturing, cleaning, and thermal spraying many materials.

Acetylene gas poses an additional hazard to other flammable gases as it is also reactive. Under certain conditions, even in the absence of any air or oxygen, it can decompose explosively into its constituent elements, carbon and hydrogen.

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When carboxylic acids deprotonate, a sulfonic anion only with general formula R-COO- is produced. This anion may be used to create a number of beneficial salts, including soaps.

In the creation of polymers, bioplastics, coatings, adhesives, and medicinal medicines, carboxylic acids and their equivalents are employed. They can also be utilized as flavorings, food additives, solvents, and antimicrobials.

The screening evaluation resulted in the conclusion that none of four chemicals with in carboxylic acid group are hazardous to either the environment or human health at the present exposure levels.

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The only-step valorization of natural gas stays a task. Methane conversion to methanol thru chemical looping over copper-containing zeolites is a promising route, and CuMFI is most of the earliest efficaciously implemented.

But, the structure of the lively web sites in CuMFI, in addition to the effect of copper loading and Si/Al ratio on the copper speciation, are but to be understood. We observed that for CuMFI, the Cu/Al ratio determines the selectivity of methane conversion by way of governing the shape of the lively dicopper sites. At a Cu/Al ratio beneath 0.3, copper-containing MFI substances host dimeric centers with a Cu–Cu separation of two.nine Å and a UV/vis absorption band at 27 two hundred cm–1 able to selective oxidation of methane to methanol in a wide temperature range (450–550 k). A higher Cu/Al ratio results in the formation of mono-μ-oxo dicopper sites with Cu–Cu = three.2 Å, which exhibit a feature band at 21 900 cm–1 and react with methane at lower temperatures (<450 k), yielding overoxidation products. identifying differences in the structure of selective and nonselective copper sites will aid inside the layout of higher-performing substances.

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The equilibrium concentration of H2O,Cl2O, HOCl are 0.3304, 2414,0.5734 respectively.

According to the given reaction

Kc= [tex]\frac{[H2O]*[Cl2O]}{[HOCl]^{2} }[/tex] so after reaching equilibrium the concentration of  H2O,Cl2O, HOCl  are  0.469-x M, 0.380-xM, 0.712+2xM respectively. And Kc given is 0.9 thus

0.9=[tex]\frac{(0.712+2x)^{2} }{(0.469-x )(0.380-x)}[/tex]

Now by solving this we come to a second order differential equation

3.1[tex]x^{2}[/tex]+2.0839x-0.346564=0

Which was solved and getting the value 0.1386.

Thus the value of [H2O] , [Cl2O] , [HOCl] at equilibrium is 0.3304, 2414,0.5734 respectively.

What is equilibrium?

When rate of a forward reaction is equal to the rate of a backward reaction.

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To calculate the atoms of an element in a given molecule, we need to multiply stoichiometry by the number that is written on the foot of that element. Therefore, the balanced equation can be written as

H[tex]_2[/tex]O[tex]_2[/tex] + 2KI  [tex]\rightarrow[/tex]  I[tex]_2[/tex] + 2KOH

Balanced equation is the one in which the total number of atoms of a species on reactant side is equal to the total number of atoms on product side. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, displacement reaction.

The other characteristic of balanced reaction is that physical state should be written with each compound or molecule on reactant and product side. Physical state should be written in brackets. s means solid, l means liquid, g means gas. The balanced equation for the given reaction can be given as

H[tex]_2[/tex]O[tex]_2[/tex] + 2KI  [tex]\rightarrow[/tex]  I[tex]_2[/tex] + 2KOH

Therefore, the balanced equation can be written as

H[tex]_2[/tex]O[tex]_2[/tex] + 2KI  [tex]\rightarrow[/tex]  I[tex]_2[/tex] + 2KOH

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False , For the most of exercisers, supplementing an appropriate diet with extra protein or amino blends will not promote muscle growth.

The basic amino group (NH2), an acetoxy group (COOH), as well as an organic Aromatic rings (or carbonyl group) that really is specific to each amino acid make up an amino acid, an organic molecule. Alpha-amino [alpha-amino] carboxylic acid is referred to as an amino acid informally.

Due to their comprehensive amino acid profiles, milk and eggs are excellent for those looking to increase lean muscle mass and strength, reduce body fat, or hasten their rate of training recovery. Lysine, histidine, hcl, valine,

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The given unit conversions for the mass and length are as follows:

a. 0.765 g = 0.000765 kg

b. 1.34 g = 1340

c. 34.2 mg = 0.0342 g

d. 23 745 kg = 2.3745 * 10⁹ mg

2. a. 17.3 m = 17300 cm

b. 2.56 m = 0.00256 km

c. 567 dm = 56.7 m

d. 5.13 m = 5130 m

3. The shortest length is 0.0128 km and the longest length is 1583 cm

The mass of an object is the amount of matter present in the substance.

The mass of objects is measured using a chemical balance, the unit of measurement is kilograms.

The various units can be interconverted.

To convert each of the following masses to the units requested, the conversion factor is used;

a. 0.765 g to kilograms

0.765 g = 0.765/ 1000

0.765 g = 0.000765 kg

b. 1.34 g to milligrams

1.34 g = 1.34 * 1000

1.34 g = 1340

c. 34.2 mg to grams

34.2 mg = 34.2 / 1000

34.2 mg = 0.0342 g

d. 23 745 kg to milligrams

23 745 kg = 23 745 * 10⁶

23 745 kg = 2.3745 * 10⁹ mg

2. To convert each of the following lengths to the units requested, the steps are as follows:

a. 17.3 m to centimeters

17.3 * 100 cm

17.3 m = 17300 cm

b. 2.56 m to kilometers

2.56 m = 2.56/ 1000

2.56 m = 0.00256 km

c. 567 dm to meters

567 dm = 567 / 10

567 dm = 56.7 m

d. 5.13 m to millimeters

5.13 m = 5.13 * 1000

5.13 m = 5130 m

3. Converting the following lengths to meters:

1583 cm = 15.83 m

0.0128 km = 12.8 m

17 931 mm = 17.931 m

14 m

The shortest length is 0.0128 km and the longest length is 1583 cm

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pH of the solution decreases as the strong acid is added to the solution of the weak base

When a strong acid is added to the solution having a weak base, the pH of the solution decreases and as a result a conjugate acid is formed. This process is known as titration.

The addition of strong acid to a weak base is known as weak base-strong acid titration.

After the formation of conjugate acid, it reacts with water molecules and forms hydronium ions. These hydronium ions dissociate into H+ and OH- ions that decrease the pH of the solution.

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These are the stronger base or acid in each pair:

Stronger base

Stronger acid

The strength of the base and acid of a molecule is strongly dependent on its bond and structure. The weaker the H-A bond, the lesser the required energy to break the molecule. Hence, the proton leaves the molecule more easily and the molecule will become a stronger acid. It makes compound with stronger bond tends to have stronger basicity.

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Explanation:

F2+ Because it is a transition metal

N3- Because it is in group 5

Mg2+ Because it is in group 2

Na+ Because it is in group 1