At what tempreture oxygen can be liquefied

The molecular equation for the gas evolution reaction between aqueous hydrobromic acid (HBr) and aqueous lithium sulfite (Li2SO3) is as follows:  2 HBr (aq) + [tex]Li_{2} So_{3}[/tex] (aq) → 2 LiBr (aq) + [tex]H_{2} So_{3}[/tex] (aq)

In this reaction, hydrobromic acid (HBr) reacts with lithium sulfite ([tex]Li_{2} So_{3}[/tex]) to form lithium bromide (LiBr) and sulfurous acid ([tex]H_{2} So_{3}[/tex]). The sulfurous acid is unstable and decomposes into water( [tex]H_{2o[/tex]) and sulfur dioxide gas ([tex]So_{2}[/tex]):

[tex]H_{2} So_{3}[/tex] (aq) → [tex]H_{2} 0[/tex]l) + [tex]So_{2}[/tex] (g)

The overall reaction is:

2 HBr (aq) + [tex]Li_{2} So_{3}[/tex] (aq) → 2 LiBr (aq) + [tex]H_{2} o[/tex] (l) + [tex]So_{2}[/tex] (g)

In this gas evolution reaction, the mixing of the two aqueous solutions results in the formation of a new compound, lithium bromide, which remains dissolved in the solution. The other product, sulfurous acid, decomposes into water and sulfur dioxide gas, which is released as bubbles in the solution. This release of gas is the characteristic feature of gas evolution reactions.

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Answer:

[-]observed experimental results

[-]theoretical calculations

Explanation:

For standard 1, the volume of stock solution required is 2.00 mL, while for standard 2, it is 4.00 mL.

In order to calculate the volume of 0.0315 m Bromocresol green (HBCG) standard stock solution required to make 10.00 ml of the three standards, we need to use the formula:

M1V1 = M2V2

Where M1 is the concentration of the stock solution,

V1 is the volume of the stock solution required,

M2 is the concentration of the final solution, and

V2 is the final volume of the solution.

To calculate the volume of 0.0315 m Bromocresol green (HBCG) stock solution required to make 10.00 ml of 0.00630 m Bromocresol green (HBCG) standard 1, we can plug in the values into the formula as:

M1V1 = M2V2V1 = (M2V2)/M1= (0.00630 mol/L x 0.01000 L)/0.0315 mol/L= 0.00200 L = 2.00 mL

Therefore, the volume of 0.0315 m Bromocresol green (HBCG) stock solution required to make 10.00 ml of 0.00630 m Bromocresol green (HBCG) standard 1 is 2.00 mL.

To calculate the volume of 0.0315 m Bromocresol green (HBCG) stock solution required to make 10.00 ml of 0.0126 m Bromocresol green (HBCG) standard 2, we can use the same formula as above:

M1V1 = M2V2V1 = (M2V2)/M1= (0.0126 mol/L x 0.01000 L)/0.0315 mol/L= 0.00400 L = 4.00 mL

Therefore, the volume of 0.0315 m Bromocresol green (HBCG) stock solution required to make 10.00 ml of 0.0126 m Bromocresol green (HBCG) standard 2 is 4.00 mL.

In conclusion, we can use the formula M1V1 = M2V2 to calculate the volume of 0.0315 m Bromocresol green (HBCG) stock solution required to make different standards.

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Answer:

Relative Dating

Explanation:

Relative dating is used to arrange geological events, and the rocks they leave behind, in a sequence. The method of reading the order is called stratigraphy (layers of rock are called strata).

Yes, the response of temperature in the atmosphere to an increase in CO2 is generally consistent. As more CO2 is added to the atmosphere, it traps more heat from the sun, leading to a gradual increase in temperature. This phenomenon is known as the greenhouse effect.

The response of temperature in the atmosphere to an increase in CO2 does not always stay the same as the CO2 is progressively increased. It changes depending on various factors. This statement is backed up by scientific evidence.CO2 is known as a greenhouse gas that warms the Earth's atmosphere by absorbing and radiating energy within the infrared range.

When there is more CO2 in the atmosphere, there will be more radiation absorbed and radiated, resulting in a temperature increase.

Therefore, as the concentration of CO2 rises, the temperature of the Earth's atmosphere should also rise. However, the relationship between CO2 and temperature is not that simple.

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Option (A) is correct. The phase of the water if the water in a tank is at the pressure of 5.5 mph and temperature of 260oc. the saturation pressure at the same temperature is 4.69 mph is compressed liquid.

A compressed liquid is defined as a fluid under mechanical or thermodynamic conditions that force it to be a liquid. A fluid is a compressed fluid if it is at a temperature lower than the saturation temperature at a given pressure. For example, water in a tank is at the pressure of 5.5 atmospheric pressure and temperature of 260oc. Compressed fluid is a substance that it is not about to vaporize. In the water tank fluid is not about to vaporize. At 1 atm. and 20°C, water exists in the liquid phase and is called compressed liquid. And if water is at 1 atm. pressure and 100°C, water exists as a liquid that is ready to vaporize and called as saturated liquid.

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The complete question is,

water in a tank is at the pressure of 5.5 mph. and temperature of 260oc. the saturation pressure at the same temperature is 4.69 mph. what is the phase of water? multiple choice question.

A. compressed liquid

B. superheated vapor

C. saturated mixture

D. saturated vapor

E. saturated liquid

Plants have cellulose-based cell walls, eukaryotic cells with large central vacuoles, and plastids such chloroplasts and chromoplasts. Therefore, the Graph is Represented by Cell Wall Structure Option D.

Parenchymal, collenchymal, and sclerenchymal cells are three different types of plant cells. The structure and function of the three categories vary.

Understanding the structure of the fungi's hard cell wall, which is necessary for their survival, may help researchers create novel antifungal medications. This wall encourages and presses the fungus to flourish without changing its properties.

The function of the cell walls of many protists, bacteria, and plants is similar to that of the fungal cell walls. In hypotonic situations, they stop cells from bursting, but in hypertonic ones, they can't stop cells from dying. A degree of physical environmental protection is also offered by these cell walls, which differ from plant cell walls in that they are made of cellulose in plants, as opposed to chitin in fungal cell walls.

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The species that should have the highest molar entropy at 298 K is CH4(g). The correct option is CH4.

Entropy is a measure of the amount of disorder or randomness in a system. In other words, it is a measure of the number of ways a system can be arranged while maintaining its energy state. It is represented by the symbol S.

The entropy of a pure crystalline substance is zero at absolute zero temperature because it has a well-defined, ordered, and rigid structure.

As temperature increases, the entropy of the substance increases because the molecules of the substance move more randomly and are distributed over a larger volume.

Entropy is highest for gases, followed by liquids and then solids. Molar entropy is a measure of the entropy of a substance per mole of the substance.

Molar entropy (S) is given by the equation:

S = ΔS/n

Where ΔS is the change in entropy and n is the number of moles of substance. At standard temperature and pressure, the molar entropy of a substance is represented by Sº.

The entropy of the given species at 298 K is as follows:

Thus, the species that should have the highest molar entropy at 298 K is CH4(g).

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A container with a volume of 23.5L can hold approximately 5.122 x 10^23 molecules of CCI4.

What are molecule?

A molecule is a group of two or more atoms that are chemically bonded together. These atoms can be of the same element, such as two oxygen atoms bonded together to form an oxygen molecule (O2), or they can be different elements, such as a water molecule (H2O) which contains two hydrogen atoms and one oxygen atom. Molecules are the building blocks of many materials and substances, including gases, liquids, and solids. They can have different properties, such as size, shape, and chemical reactivity, depending on the specific arrangement and types of atoms they contain. Molecules play a fundamental role in many scientific fields, including chemistry, biology, and physics, and are studied extensively to understand the properties and behavior of matter at the molecular level.

To answer this question, we need to know the density of CCI4, which is a measure of how much mass is present in a given volume of the substance. The density of CCI4 is 1.594 g/mL.

We can use the following conversion factor to convert the density to a number of molecules per liter:

1.594 g/mL x (1 mole CCI4 / 153.82 g) x (6.022 x 10^23 molecules / 1 mole) = 2.176 x 10^22 molecules/L

This tells us that there are 2.176 x 10^22 molecules of CCI4 per liter of volume.

To find the number of molecules that can be held in a container with a volume of 23.5L, we simply need to multiply the number of molecules per liter by the total volume of the container:

2.176 x 10^22 molecules/L x 23.5 L = 5.122 x 10^23 molecules

Therefore, a container with a volume of 23.5L can hold approximately 5.122 x 10^23 molecules of CCI4.

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Answer: The pH of a 0.138 M solution of H3PO4 (assuming complete dissociation for the sake of the example) is 1.49.

The following steps can be used to determine the pH of the solution.

Phosphoric acid is a triprotic acid, which means that it can donate three hydrogen ions (H+) to a solution. Phosphoric acid's first dissociation reaction is as follows:

H3PO4(aq) → H+(aq) + H2PO4-(aq) This means that in water, H3PO4 will donate one hydrogen ion (H+) to the solution, leaving behind the negatively charged H2PO4- ion.

To determine the pH of the solution, we can use the formula:

pH = -log[H+]

First, we need to determine the concentration of H+ ions in the solution, which we can find from the dissociation of H3PO4. H3PO4(aq) → H+(aq) + H2PO4-(aq) Initially, the concentration of H3PO4 is 0.138 M. Since we're assuming complete dissociation for the sake of this example, we can say that 100% of the H3PO4 dissociates into H+ and H2PO4-.

This means that the concentration of H+ in the solution is equal to the initial concentration of H3PO4:0.138 MWe can now substitute this value into the pH formula:

pH = -log[H+]pH = -log[0.138]pH = 1.49

Therefore, the pH of the 0.138 M solution of H3PO4 (assuming complete dissociation for the sake of the example) is 1.49.

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Answer:

choice number 3 (70° degrees)

Explanation:

here he is asking that how many degrees of water will boil when the surface of water in the liquid state is 30kPa. So when it is 30kPa becomes boiled at 70°degrees. Hope it helps you!

Magnetite has a higher iron content than hematite, with a percentage of approximately 70% iron content per kilogram, compared to hematite which has approximately 50% iron content per kilogram.

Therefore, Magnetite provides the greater percent of iron per kilogram.

Hematite (Fe2O3) and Magnetite (Fe3O4) are two important ores of iron.

The greater iron content of Magnetite is due to its higher iron to oxygen ratio compared to hematite.

Specifically, the formula of Magnetite is Fe3O4, with three iron (Fe) atoms and four oxygen (O) atoms, while the formula of Hematite is Fe2O3, with two iron (Fe) atoms and three oxygen (O) atoms.

This difference in the ratio of iron to oxygen gives Magnetite a higher iron content.

The higher iron content of Magnetite makes it more desirable for use in various applications, such as in steel production.

Steel production requires a high amount of iron and therefore Magnetite is the more attractive option. Additionally, the high iron content also makes Magnetite more valuable than Hematite as it can be sold for a higher price.

Magnetite has a higher iron content than Hematite and thus provides the greater percent of iron per kilogram.

This makes Magnetite the preferred choice for various applications, including steel production and sale.

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Therefore, the correct answer is (E) The reaction would shift toward products and the solubility would increase.

Both hydrogen ions (H +) and chloride ions (Cl -) would be added to the equilibrium mixture if hydrochloric acid were to be added. When hydrogen ions are on the right side of the equilibrium, it will shift to the left to make up for this, increasing the concentration of reactants.

When HCl is added to the system, what will happen to the chemical equilibrium There will be a leftward change in the chemical equilibrium.

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Electron drift speed is the speed at which an electron moves through a conductor when a voltage is applied across it. To calculate electron drift speed:

v = (I/nAq),

where v is the electron drift velocity, I is the current flowing in the conductor, n is the number of free electrons per unit volume of the conductor, A is the cross-sectional area of the conductor, and q is the charge of an electron.

For copper, the number of free electrons per unit volume (n) = 8.5 x 10^22 /cm^3,

cross-sectional area (A) = 1 cm^2.

The charge of an electron (q) = 1.6 x 10^-19 C.

Therefore, for electron drift speed:

v = (I/nAq)v

  = (I / (8.5 x 10^22 /cm^3 x 1 cm^2 x 1.6 x 10^-19 C))v

  = (I / 1.36 x 10^3 A/cm^2)

Assuming that the current flowing is 1 A,

v = (1 A / 1.36 x 10^3 A/cm^2)v

  = 7.35 x 10^-4 cm/s

Thus, the electron drift speed for copper can be calculated to be 7.35 x 10^-4 cm/s.

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Answer: The defense mechanism in which self-justifying explanations replace the real, unconscious reasons for actions is Rationalization.

Rationalization is a type of defense mechanism where individuals create a logical explanation for their own behavior, even if the behavior is actually driven by emotions or unconscious thoughts.

This type of defense is used to protect the ego from the anxiety of a certain situation, usually one that is perceived to be too uncomfortable or overwhelming.

By rationalizing a behavior, the individual is able to tell themselves that they did the right thing, even if the choice was not made consciously or with the best intentions. Rationalization is a way to protect one’s ego by creating a logical justification for an action.

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The value of the constant, k, for this data is 51.5.

option D.

To determine the constant k, we can use the formula:

PV = k

where;

We can rearrange the formula to solve for k:

k = PV

Now, we can multiply the pressure and volume values for each data point to get the corresponding value of k:

For the first data point: k = 1.15 kg/cm² x 44.8 mL = 51.52

For the second data point: k = 1.24 kg/cm² x 41.5 mL = 51.40

For the third data point: k = 1.47 kg/cm² x 35.0 mL = 51.45

We can take the average of these values to get an overall value for k:

k = (51.52 + 51.40 + 51.45) / 3 = 51.46 ≈ 51.5

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