Some N2 gas is mixed with some O2 gas, and the sketch below shows a representative sample of the mixture. The total pressure of the mixture is measured, and found to be 300.Calculate the mole fraction and partial pressure of each gas in this mixture. Round your answers to 3 significant digits. You may assume each gas behaves as an ideal gas. gas mole fraction partial pressure N2 3 x 10 90.0 torr O2 7 x 10-1 210 torrwhat is the correct significant digit?

Answer:

Filtration would be the easiest as liquid will pass through filter leaving solid.

Answer:

I believe it would be 2

Explanation:

if there are 2 nitrogen molecules then there would have to be 2 hydrogen molecules but this could be completely wrong

if this happens to be right, ur welcome :3 here's a Jay Jay pic for u cuz why not

Answer:

Anwer is A  0.60

Explanation:

The chair conformations of 1-ethyl-3-methylcyclohexane and 1-sec-butyl-4-ethylcyclohexane were drawn.

In case of 1-ethyl-3-methylcyclohexane, the most stable conformation would be the one with the ethyl group in the equatorial position.

In case of 1-sec-butyl-4-ethylcyclohexane, the most stable conformation would be the one with the sec-butyl group in the equatorial position.

1. 1-Ethyl-3-methylcyclohexane:

In this compound, we have an ethyl group (CH3CH2-) and a methyl group (CH3) attached to the cyclohexane ring.

The chair conformations of 1-ethyl-3-methylcyclohexane are as follows:

a) Equatorial Ethyl:

```

         H

         |

         H

         |

      CH3CH2

        |

    H-C-C-H

      | |

   CH3   H

```

b) Axial Ethyl:

```

         H

         |

         H

         |

      CH3CH2

        |

      H-C-C-H

        | |

        H CH3

```

In this case, the most stable conformation would be the one with the ethyl group in the equatorial position. This is because the equatorial position is less sterically hindered compared to the axial position. The bulky ethyl group experiences less steric strain when it occupies the equatorial position, leading to greater stability.

2. 1-Sec-butyl-4-ethylcyclohexane:

In this compound, we have a sec-butyl group (CH3CHCH2CH3) and an ethyl group (CH3CH2-) attached to the cyclohexane ring.

The chair conformations of 1-sec-butyl-4-ethylcyclohexane are as follows:

a) Equatorial Sec-butyl:

```

           H

           |

           H

           |

        CH3CH

       |     |

    H-C-C-H

      | |

   CH2CH3 H

```

b) Axial Sec-butyl:

```

           H

           |

           H

           |

        CH3CH

       |     |

      H-C-C-H

        | |

        H CH2CH3

```

In this case, the most stable conformation would be the one with the sec-butyl group in the equatorial position. Similar to the previous compound, the equatorial position is less sterically hindered, leading to lower steric strain on the bulky sec-butyl group. Therefore, the equatorial conformation is more stable.

It is worth noting that the stability differences between the axial and equatorial conformations in these compounds may not be as significant as in larger substituents or more strained ring systems.

However, in general, the equatorial position is favored due to reduced steric interactions, resulting in higher stability.

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Answer:

1 respuesta. fórmula empírica = CH2

Explanation:

Translatation: 1 Answer. empirical formula = CH2

Answer:

C₂H6

Explanation:

Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). Option A

A hydrocarbon is a compound that consists of only carbon and hydrogen atoms. It is important to identify the formula that represents a hydrocarbon among the given options:

A) C₂H6: This formula represents ethane, which is a hydrocarbon. Ethane consists of two carbon atoms bonded together with single bonds and six hydrogen atoms.

B) C₂H5OH: This formula represents ethanol, which is not a hydrocarbon. Ethanol contains a hydroxyl group (-OH), indicating the presence of oxygen in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.

C) C₂H5Cl: This formula represents ethyl chloride, which is not a hydrocarbon. Ethyl chloride contains a chlorine atom (Cl) in addition to carbon and hydrogen atoms. It is a haloalkane, not a hydrocarbon.

D) C₂H6O: This formula represents ethanol, which, as mentioned before, is not a hydrocarbon. Ethanol contains an oxygen atom (O) in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.

Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). It consists only of carbon and hydrogen atoms, making it a suitable representation of a hydrocarbon.

In summary, the formula C₂H6 (option A) represents a hydrocarbon, while the other options contain additional elements (oxygen or chlorine) that make them non-hydrocarbon compounds. Option A

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The given compound 1,3-dichloropentane is optically active .

Because this compound does not have plane of symmetry (POS) and center  of symmetry (COS) . And also forms non superimposable mirror image . the compound is optically active .

It has  chiral center.

Here , the chiral carbon is bonded to 4 distinct groups such as :  hydrogen , ethyl , chloroethane , and chlorine .

A compound when we cut it into through a plane then if the two halves are superimpossable to each other then the compound have plane of symmetry.

Have Sp3 hybridized center (4sigma bond ) .

4 distinct group  is attached to the chiral atom. form non -superimposable mirror image .

Same molecular formula and same structural formula . also have same physical and chemical properties .

They shows different behavior towards plane polarized light.

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Molar mass:-

\(\\ \sf\longmapsto LiCN\)

\(\\ \sf\longmapsto 7u+12u+14u\)

\(\\ \sf\longmapsto 21u+12u\)

\(\\ \sf\longmapsto 33u\)

\(\\ \sf\longmapsto 33g/mol\)

No of moles=Given Mass/Molar mass

\(\\ \sf\longmapsto \dfrac{83}{33}\)

\(\\ \sf\longmapsto 2.5mol\)

Answer:

Phosphorus pentasulfide.

Explanation:

C. Calcium is your best bet. Calcium chloride is amongst inorganic compounds.

Answer:

the answer is twenty-four

Answer:

In fact, there are actually several ways crude or refined oil may reach the marine environment. ... Use or consumption of oil (which includes operational discharges from ships and discharges from land-based sources): 37% Transportation (accidental spills from ships): 12% Extraction: 3% :))

Transportation (accidental spills from ships): 12% Extraction: 3% Natural seeps: 46%.

Wherever oil is consumed, such as in manufacturing or when loading a ship with fuel, there are opportunities for oil spills. According to the Washington State Department of Ecology(link is external) [PDF], most spills that occur during ship fueling happen because of inattention, inadequate procedure, procedural error, or poor judgment—in other words, human error.

The typically small-in-size spills that come from consuming oil originate from a variety of activities and actually account for most of the oil spilled by humans into the sea.

When the Exxon Valdez oil spill occurred, on the other hand, crude oil was in transport. Since oil is an international commodity and in constant demand, there are always ships, pipelines, and (increasingly) trains moving it around the world.

According to the International Tanker Owners Pollution Federation(link is external), occurrences of large spills from tankers and barges (above approximately 2,000 gallons) have decreased dramatically since 1970. This can be attributed at least in part to advances in safety thanks to the Oil Pollution Act of 1990.

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1.29 x 10⁻⁵ M.

Explanation:

The molar solubility of \(CaF_{2}\) in a 0.029 M NaF solution can be calculated using the following steps:

1. Write the balanced chemical equation for the dissolution of \(CaF_{2}\):
\(CaF_{2}\) (s) ⇌ Ca²⁺ (aq) + 2F⁻ (aq)

2. Write the expression for the solubility product constant (Ksp) of \(CaF_{2}\):
Ksp = [Ca²⁺] [F⁻]²

3. Define the variables:
Let x be the molar solubility of \(CaF_{2}\).
[Ca²⁺] = x
[F⁻] = 2x + 0.029 (since there is already 0.029 M F⁻ from NaF)

4. Substitute the values into the Ksp expression:
Ksp = (x) (2x + 0.029)²

5. Substitute the given Ksp value (2.0 x 10⁻¹⁰) and solve for x:
2.0 x 10⁻¹⁰ = (x) (2x + 0.029)²

6. Solve the equation for x:
x ≈ 1.29 x 10⁻⁵ M

The molar solubility of \(CaF_{2}\) in a 0.029 M NaF solution is approximately 1.29 x 10⁻⁵ M.\

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Answer:

.02232 mole

Explanation:

At STP each 22.4 liters is a mole

.5 liters / 22.4 l/mole = .02232 mole

The adding of an acid or base to a buffer seems to have no effect on the pH of the buffer. In contrast, going to add acid or base to unbuffered water drastically changes the pH.

Any hydrogen-containing substance skilled of making a donation a proton (hydrogen ion) to that other substance is defined as an acid. A base is a compound or ion that really can accept an acid's hydrogen ion. The sour flavours of weak acids is generally described by the contaminant that emits hydrogen ions in water and formation salts by incorporating with these metals. Acids have a bitter aftertaste and cause certain dyes to turn red. buffer is an aqueous solution that withstands adjustments in pH upon on the addition of either an acid or a base". Furthermore, adding water to a buffer or going to allow it to evaporate from of the buffer has no significant effect just on pH of the buffer.

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Answer:

The right option is; an experimental investigation, because it allows for the control of variables.

Explanation:

The Kreb's cycle, also known as the citric acid cycle, is a series of reactions that occur in the mitochondria of cells. These reactions are essential for the production of energy in the form of ATP. One of the key features of the Kreb's cycle is the generation of high-energy intermediates.

The transphosphorylation is a process by which a phosphate group is transferred from one molecule to another. This process is often coupled with the hydrolysis of ATP, resulting in the release of energy that can be used by the cell. In the context of the Kreb's cycle, transphosphorylation often occurs following the conversion of a substrate into a high-energy intermediate. A) Succinyl-CoA synthetase: This enzyme catalyzes the conversion of succinyl-CoA to succinate, with the concomitant production of ATP. This reaction involves a transphosphorylation, as the phosphate group from the enzyme-bound nucleotide is transferred to ADP to form ATP. However, this reaction does not involve the conversion of a substrate into a high-energy intermediate.

B) Aconitase: This enzyme catalyzes the conversion of citrate to isocitrate. This reaction does not involve a transphosphorylation. C) Citrate synthase: This enzyme catalyzes the formation of citrate from acetyl-CoA and oxaloacetate. This reaction does not involve a transphosphorylation. D) Fumarase: This enzyme catalyzes the conversion of fumarate to malate. This reaction does not involve a transphosphorylation. E) Alpha-ketoglutarate dehydrogenase complex: This enzyme catalyzes the conversion of alpha-ketoglutarate to succinyl-CoA. This reaction involves the generation of a high-energy intermediate (succinyl-CoA) and the production of NADH. However, this reaction does not involve a transphosphorylation. Therefore, the correct answer is none of the above. None of the Kreb's cycle reactions is often followed rapidly by a transphosphorylation.

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For getting an indication whether a chemical reaction or chemical change has taken place, if  B)Heat is given off then chemical reactions occur. So,correct option is B.

Chemical reactions are surrounding us, from the digestion of food in our body to how the light we get from the sun is the consequence of compound responses. Prior to starting with compound responses, realizing about physical and synthetic changes is significant

Option A can't be the response is dissolving is an actual change. No substance response occurred.

Option B is the response as it is an EXOTHERMIC reaction so intensity will be emitted.

Option C can't be the response as dissolving is essentially ions becoming particles, not a synthetic response by which a reactant responds with one more reactant to shape an item.

Option D can't be the response. Same explanation with respect to why An isn't the response.

Hence, correct option is B.

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(Complete question) is:

When determining whether a chemical reaction has taken place, you observe and look for several indicators. Which would be considered an indication that a chemical reaction or chemical change has taken place? A) Solid melts. B) Heat is given off. C) Substance dissolves D) Substance changes shape.

The Celsius temperature on the beach is approximately 35.8 degrees Celsius.

The pressure-temperature relationship is governed by Charles' Law, which states that as long as pressure is constant, the volume of a gas will be directly proportional to its temperature.The equation used to determine the relationship between temperature and pressure is as follows: PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the universal gas constant, and T is the temperature in Kelvin (K).Let's utilize the formula given above to find the temperature of the beach:P1V1/T1 = P2V2/T2We can substitute the values we've been provided to solve for T2 : When the can is at 16 degrees Celsius and 4.5 atm, the pressure is:P1 = 4.5 atmT1 = 16°C + 273 = 289 KV1 and V2, which are the same, can be omitted. P2 = 4.81 atm Substituting these values in the equation : P1V1/T1 = P2V2/T2V1 and V2 are equal and can be eliminated. We can also change the temperature to Kelvin, so:T2 = (P2 * T1 * V1) / (P1 * V2)T2 = (4.81 atm * 289 K) / 4.5 atmT2 = 308.8 KSubtract 273 to convert back to Celsius : T2 = 308.8 K - 273 K = 35.8 degrees Celsius.

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Answer:

false tjytyjiy

Explanation:

cnruujrkyrryyrkkurk

The limiting reagent in this reaction is the hydrogen chloride (HCl).

What is reagent?
A reagent, also known as an analytical reagent, is a substance as well as compound that is added to a system in chemistry to bring about a chemical reaction or check to see if one occurs. Although the terms "reagent" and "reactant" are frequently used interchangeably, "reactant" refers to a substance that is consumed during a chemical reaction. Despite being a part of the reaction mechanism, solvents are not typically referred to as reactants. Catalysts are not reactants because they are not consumed by the reaction. The reactants in biochemistry are frequently referred to as substrates, particularly in relation to enzyme-catalyzed reactions.

The limiting reagent in this reaction is the hydrogen chloride (HCl). This is because it requires more moles of HCl than ammonia to produce ammonium chloride (NH4Cl). The number of moles of HCl is 0.0998, while the number of moles of ammonia is 0.0498, so HCl is the limiting reagent.

The amount of NH4Cl that will be formed will be 4.98 g, since this is the amount of the limiting reagent, HCl.

The pressure of the gas remaining in the flask will be unchanged, since no gas is consumed in the reaction, only solids. Therefore, the pressure will remain at 0.50 atmospheres.

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Answer:

Explanation:

Both plastic and gasoline are products of pretroleum

Answer:  Tt will take approximately 4.49 x 10^(-10) seconds for the centrifuge until a 3 cm displacement of the boundary layer occurs relative to the initial 4 cm location of the boundary layer.

Explanation:

To determine the time it will take for the centrifuge until a 3 cm displacement of the boundary layer occurs relative to the initial 4 cm location of the boundary layer, we can use the sedimentation coefficient (S) and the angular velocity of the centrifuge.The formula for calculating the displacement (Δr) of the boundary layer in a centrifuge is:

Δr = S * ω * tWhere:

Δr is the displacement of the boundary layer (in cm),

S is the sedimentation coefficient (in s),

ω is the angular velocity of the centrifuge (in rad/s), and

t is the time (in seconds).

Here, the initial displacement of the boundary layer is 4 cm and we want to achieve a displacement of 3 cm, the change in displacement (Δr) is 3 cm - (-4 cm) = 7 cm.We need to convert the angular velocity from rpm to rad/s. Since 1 rpm = (2π/60) rad/s, the maximum angular velocity of 35,000 rpm is equal to (35,000 * 2π/60) rad/s ≈ 3665.19 rad/s.

Let's calculate the time (t):

t = Δr / (S * ω)For alcohol dehydrogenase:

S = 4.88 x 10^(-13) s

ω = 3665.19 rad/st = 7 cm / (4.88 x 10^(-13) s * 3665.19 rad/s)

t ≈ 4.49 x 10^(-10) s

Therefore, it will take approximately 4.49 x 10^(-10) seconds for the centrifuge until a 3 cm displacement of the boundary layer occurs relative to the initial 4 cm location of the boundary layer.

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By following serial dilution method, you can achieve the desired concentrations using small volumes while ensuring accurate dilution ratios. It is essential to handle the small volumes carefully and accurately to maintain the desired concentrations throughout the dilution process.

To perform a serial dilution with small volumes, such as in this case where measuring less than 1µL is not possible, we can use a stepwise dilution approach.

Start with the initial concentration of 14.2mM in 1mL of stock media.

To prepare the first dilution of 10µM, transfer 1µL from the stock solution and add it to 99µL of a diluent (such as water or buffer). This results in a 100µL solution with a concentration of 10µM.

For subsequent dilutions, repeat the same process. Take 1µL from the previous dilution and add it to 99µL of diluent.

Repeat step 3 for each desired concentration. For example, to obtain a concentration of 5µM, take 1µL from the 10µM solution and add it to 99µL of diluent.

Continue this stepwise dilution process until you reach the final desired concentrations: 2.5µM, 1µM, 750nM, 500nM, 250nM, 100nM, 50nM, and 10nM.

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The chemical equation that depicts a balanced chemical reaction is the one in choice B.

In this choice, the same number of atoms of each elements is in both, reactants and products sides, which means that the law of conservation of mass is fulfilled.

The correct answer is choice B.

A temperature reversal is a layer in the air where air temperature increments with level. The lower part of a cap has an inversion. The cap is a layer of relatively warm air above. In the winter, a long, clear night is ideal for temperature inversion.

It ensures that the heat that escapes is greater than the heat that enters. Nevertheless, air should not be mixed vertically at lower levels. The earth is cooler than the air above it in the early morning hours because the day's heat is reflected off during the night. Temperature inversion is typical over polar regions.

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There are approximately 0.38133 moles of nitrogen in the sample of epinephrine. Epinephrine is both a neurotransmitter and a hormone, but it acts mainly as a hormone. Epinephrine, also known as adrenaline, plays an important role in your body's fight-or-flight response. It's also used as a medication to treat many life-threatening conditions

To determine the number of moles of nitrogen in the sample of epinephrine, we need the molar ratio between carbon and nitrogen in the compound. Without this information, we cannot provide a direct answer. The molar ratio can be obtained from the chemical formula of epinephrine (C9H13NO3), which indicates that there is 1 nitrogen atom for every 9 carbon atoms.

Using this information, we can set up a proportion:

(Number of moles of nitrogen) / (Number of moles of carbon) = (Number of nitrogen atoms) / (Number of carbon atoms)

Since we know the number of moles of carbon is 3.432, we can solve for the number of moles of nitrogen:

(Number of moles of nitrogen) / 3.432 = 1/9

Cross-multiplying, we get:

(Number of moles of nitrogen) = (3.432 * 1) / 9

Calculating the result:

(Number of moles of nitrogen) = 0.38133 moles

Therefore, there are approximately 0.38133 moles of nitrogen in the sample of epinephrine.

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Answer:

violet

Red has the longest wavelength and violet has the shortest wavelength. When all the waves are seen together, they make white light. Ultraviolet (UV) light—is radiation with a wavelength shorter than that of visible light, but longer than X-rays, in the range 10 nm to 400 .

Explanation:

Note that the diagrammatic representation of all the phases of water is attached accordingly.

The processes involved in the changes between gas, solid, and liquid states of matter are:

The changes between gas, solid, and liquid states can be brought about by altering temperature and/or pressure.

For example, decreasing the temperature and/or increasing the pressure can cause a gas to become a liquid or a solid, while increasing the temperature and/or decreasing the pressure can cause a solid or liquid to become a gas. Other factors such as intermolecular forces and molecular structure can also affect the state of matter.

Note that the four phases of matter are gas, solid, liquid, and plasma. In the gas phase, molecules are far apart and move quickly.

In the solid phase, molecules are tightly packed and vibrate in place. In the liquid phase, molecules are close together and move randomly. Plasma is a high-energy state of matter that consists of ionized particles.

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The most important behavior rule in a lab is safety. In a laboratory setting, safety is the most important behavior rule that must be observed in order to ensure the health and well-being of everyone involved.

What is lab?

A laboratory, or lab for short, is a controlled environment where scientific experiments, research, and investigations are conducted. Laboratories are found in a variety of settings, including research institutions, schools, and hospitals, and are frequently used in chemistry, biology, and physics, as well as other sciences and fields.The laboratory is a highly controlled environment, and there are many precautions that must be taken to ensure the safety of everyone involved. These precautions include the use of personal protective equipment, the proper handling and storage of chemicals, the use of appropriate equipment and techniques, and the observance of safety protocols and rules.

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