why does fractional distillation of 2 components more easily accomplished if they differ by 20 degrees

The molecule O=C=S is linear and has a Lewis structure analogous to that of CO2. This molecule is polar molecule.

What are polar molecules?

Polar molecules are molecules that have two oppositely charged ends. Polar molecules exist as a result of differences in the electronegativities of the atoms of the elements found in the molecule.

With two electron domains around the central atom .the electron domain & molecular geometries are linear .sinces oxygen is more electronegative than sulphur.

The bond dipole symmetrically distributed around the carbon atom , are not identical and therefore,the bond dipole do not sum to zero.

Therefore, OCS molecule is a polar molecule not a non polar.

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Answer: A renewable resource is a resource that can easily be replaced over a short amount of time.

Explanation: Unlike the non-renewable resources, they can be replenished.

Examples for non-renewable: coal, oil, and fossil fuels.

Examples for renewable resources: Wind, nuclear, solar power, and water.

Answer:

Calcium and magnesium sulphide react to form calcium sulphide and magnesium metal.

Explanation:

Ca + MgS → CaS + Mg

The reaction between calcium and magnesium sulfide produces calcium sulfide and magnesium metal. The balanced equation can be given as Ca + MgS → CaS + Mg.

An equation for just a chemical reaction is said to be balanced if both the reactants as well as the products have the same number of atoms and total charge for each component of the reaction. In other words, both side of the reaction have an equal balance of mass and charge.

Conservation of charge as well as mass, equation and reaction balance, etc. The components and outcomes of a chemical reaction are listed in an imbalanced chemical equation, but the amounts necessary to meet the conservation of mass are not specified. The reaction between calcium and magnesium sulfide produces calcium sulfide and magnesium metal. The balanced equation can be given as Ca + MgS → CaS + Mg.

Therefore, the balanced equation can be given as Ca + MgS → CaS + Mg.

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Answer:

precipitation

Explanation:

gravity pulls down rain

The final electron acceptor in the lactic acid fermentation is pyruvate. Option B is correct.

Lactic acid fermentation is a metabolic pathway that occurs in the cytoplasm of cells and is an alternative to aerobic respiration for the production of ATP (adenosine triphosphate) when oxygen is not available or is limited. It involves the conversion of glucose into lactic acid, which can be used as an energy source by cells.

During lactic acid fermentation, pyruvate is reduced by NADH to form lactate, which serves as the end product of the fermentation process. In this process, NADH donates electrons to pyruvate, which is converted into lactate, regenerating the supply of NAD⁺ that is needed for glycolysis to continue.

In contrast, in aerobic respiration, the final electron acceptor is oxygen, which is reduced to form water.

Hence, B. pyruvate is the correct option.

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It is better to use the analytical balance for smaller amounts of sodium hydroxide (up to a couple of grams).

The sensitivity of the analytical balance goes to a couple of tenths of a milligram, while the sensitivity of a top-loading balance goes to tens of milligrams at best. The amount of water absorbed by sodium hydroxide is significant, but not too great relative to the mass of the sample. With this in mind, it is far more recommendable to use the analytical balance over the top-loading balance in order to be able to register the change in mass at all.

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The first order rate constant for ¹⁴C can be calculated using the equation:
k = ln(2)/t1/2
where ln represents the natural logarithm, and t1/2 represents the half-life of the radioisotope.

Substituting the values given in the question, we get:
k = ln(2)/5730 years
k ≈ 0.0001209682 years⁻¹

Therefore, the first order rate constant for ¹⁴C is approximately 0.0001209682 years⁻¹.

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This is a balanced chemical reaction equation since the number of atoms of each of the elements is the same on both sides of the reaction equation.

We know that the term chemical reaction has to do with the kind of interaction that does occur between reactants and products. In this case, we have the reaction that exists between methane and oxygen. This is a combustion reaction.

There is one carbon atoms on the reactant side and one carbon atom on the products side. There are four hydrogen atoms of the reactants side and fur hydrogen atoms on the products side. There are four oxygen atoms on the reactants side and four oxygen atoms on the products side.

There are two oxygen molecules on the reactants side and there are two water molecules on the products side. This is a balanced chemical reaction equation.

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The correct answer is B. NaHCO3 (sodium bicarbonate) is soluble in water because NaHCO3 is an ionic compound with polar characteristics, allowing it to dissolve in the polar solvent water..

Water is a polar solvent, meaning it has a partial positive and negative charge due to the uneven distribution of electrons between the hydrogen and oxygen atoms. Hexane (C6H14), on the other hand, is a nonpolar solvent, meaning it lacks any significant charge separation.
Solubility of a solute is determined by the principle "like dissolves like," which means that polar solvents dissolve polar solutes, and nonpolar solvents dissolve nonpolar solutes.
The other options are incorrect because:
A. CaCl2 (calcium chloride) is soluble in water, not hexane, due to its polar nature as an ionic compound.
C. Octane (C8H18) is nonpolar and soluble in nonpolar solvents like hexane, not in polar solvents like water.
D. Mineral oil is nonpolar and soluble in nonpolar solvents, not in polar solvents like water.

Therefore, NaHCO3 (sodium bicarbonate) is soluble in water (Option b). This is because NaHCO3 is an ionic compound with polar characteristics, allowing it to dissolve in the polar solvent water.

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\(KCl(ag) + AgNO_3(aq)\) → \(KNO_3(aq) + AgCl(s)\) is the precipitation reactions.

A precipitate is an insoluble substance. A reaction in which insoluble solid precipitate is formed is called Precipitation Reaction.

For example, When Sodium Sulphate solution is mixed with Barium Chloride solution It forms Barium Sulphate and Sodium Chloride solution.

Precipitation reactions are usually double displacement reactions involving the production of a solid form residue called the precipitate.

These reactions also occur when two or more solutions with different salts are combined, resulting in the formation of insoluble salts that precipitate out of the solution.

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Number of hydrogen atoms in 0.98 mol of cisplatin is 0.98* 6.023*10^23 atoms.

A number of malignancies are treated with the chemotherapeutic drug cisplatin. In this group are cancers of the testicles, ovaries, cervix, breast, bladder, head and neck, esophagus, lung, mesothelioma, brain tumors, and neuroblastoma. To administer it, a vein is injected.

The suppression of bone marrow, hearing issues, kidney damage, and vomiting are frequent adverse effects. Other severe side effects include heart disease, electrolyte imbalances, allergic responses, numbness, and difficulty walking. The growing fetus may suffer from use while pregnant. Cisplatin belongs to the class of drugs known as platinum-based antineoplastics. It functions in part by attaching to DNA and preventing replication.

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Answer:

The statement means that in every interaction, there is a pair of forces acting on the two interacting objects. The size of the forces on the first object equals the size of the force on the second object. The direction of the force on the first object is opposite to the direction of the force on the second object. Forces always come in pairs - equal and opposite action-reaction force pairs. 

Explanation:

The statement means that in every interaction, there is a pair of forces acting on the two interacting objects. The size of the forces on the first object equals the size of the force on the second object. The direction of the force on the first object is opposite to the direction of the force on the second object. Forces always come in pairs - equal and opposite action-reaction force pairs. 

Answer:

8 mol of hydrogen will react with 1 mol of sulfur.

Explanation:

We'll begin by writing the balanced equation for the reaction.

This is given below:

8H2 + S8 —> 8H2S

Now, let us carefully observe the mole ratio of the reactants.

This is illustrated:

The mole ratio of the reactants ( i.e H2 and S8) is 8 : 1

From the balanced equation above,

We can thus, concluded that:

8 moles of H2 will reacted with 1 mole of S8.

Answer:

b

Explanation:

edge 2021

Answer:As the ball is at 70 degree celsius and the water is at 30 degree celsius, the heat flow will take place from the hot metal ball towards the water which is at low temperature.

Explanation:

Therefore,  there will be a decrease in the temperature of the metal ball.

Answer:

addition polymerization

Explanation:

Answer:

Acid is a kind of chemical compound that when dissolved in water gives a solution with H+ ion activity more than purified water. A base is an aqueous substance that donates electrons, accept protons or release hydroxide (OH-) ions. An acid is a proton donor. While a base is a proton acceptor.

Explanation:

Hey mate, here's your answer...

Answer:

640 grams

Explanation:

look up Solubility table in wikipedia for potassium nitrate (KNO3)

32 grams of potassium nitrate (KNO3) water solubility at 20 degrees celsius (room temperature) can be dissolved in 100 milliliters (0.1 L) of water.

2 liters = 2000 milliliters

32 grams / 100 milliliters = x grams / 2000 milliliters

cross-multiply

100 * x = 32 * 2000

x = (32 * 2000) / 100

x ≈ 640 grams

chatgpt

The volume of the gas changed by approximately 0.280 m³ during the process.

To find the change in volume of the gas during the process, we can use the equation:

ΔQ = nCvΔT

where: ΔQ is the heat absorbed (3870 J),

n is the number of moles of the gas (7.70 mol),

Cv is the molar heat capacity at constant volume,

ΔT is the change in temperature (24.2 °C = 24.2 K).

Since the change in internal energy is zero (ΔU = 0), we know that ΔU = ΔQ + ΔW, where ΔW is the work done by the gas. In this case, since the process is at constant pressure, we can write ΔW = PΔV, where P is the pressure (1.62E+5 Pa) and ΔV is the change in volume.

Now, using the ideal gas law, we can express ΔV in terms of ΔT:

ΔV = (nRΔT) / P

where R is the ideal gas constant (8.314 J/(mol·K)).

Substituting the given values into the equations:

ΔQ = nCvΔT

3870 J = 7.70 mol × Cv × 24.2 K

From the equation ΔV = (nRΔT) / P, we have:

ΔV = (7.70 mol × 8.314 J/(mol·K) × 24.2 K) / (1.62E+5 Pa)

Simplifying the equations and performing the calculations:

ΔQ = nCvΔT

3870 J = 7.70 mol × Cv × 24.2 K

Cv ≈ 2.00 J/(mol·K) (calculated from the above equation)

ΔV = (7.70 mol × 8.314 J/(mol·K) × 24.2 K) / (1.62E+5 Pa)

ΔV ≈ 0.280 m³

Therefore, the volume of the gas changed by approximately 0.280 m³ during this process.

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Out of the given options, the liquid that helps grow a tomato plant faster is a. water

Since the growth of its plant by planting it can be observed, tomatoes, which include a living system, are actually a part of a more complicated system. Despite the fact that tomato fruits are filled with small seeds, if they fall to the ground, they will immediately grow.

Water is the substance that will enable a tomato plant to grow more quickly. Water is crucial for plant growth because it keeps plants hydrated and makes it easier for them to absorb nutrients through their roots. It promotes photosynthesis, stimulates the movement of nutrients and minerals throughout the plant, and keeps plant cells hard and swollen.

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Complete Question:

Which liquids will help grow a tomato plant faster ?

a. water,

b. coffee,

c. milk, and

d. fertilizer

e. dissolved water

Determine the water phase transition that is not appropriately matched: Melting - energy absorbed (should be energy released).

Melting - energy absorbed is the wrong answer in the options that are connected to the phases of water. In order to overcome the intermolecular interactions and transform the solid state of the material into a liquid, energy must be absorbed by the substance during melting. In contrast, energy is released when water vapour transforms into liquid in condensation as opposed to deposition, when it transforms into ice first. When solid ice transforms into water vapour in the process of sublimation, energy is absorbed, and as liquid water transforms into water vapour in the process of evaporation, energy is released.

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Answer:

i thank its 4)

Explanation:

becuse if they have reactino or no reatino will it 4) becuse i did this

The charge of an atom is determined by the difference between its number of protons and electrons. In this case, the iron atom has 26 protons and 27 electrons, resulting in a net charge of -1.

Normally, an atom is neutral, meaning it has an equal number of protons and electrons. However, when an atom gains or loses electrons, it becomes an ion and carries a charge. If an atom gains electrons, it becomes negatively charged, while losing electrons causes the atom to become positively charged. In this case, the iron atom has one more electron than protons, resulting in a negative charge of -1.

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Answer:

Atomic mass is never an integer number for several reasons

What should you have ready before introducing a sample or solvent to a separatory funnel. A flask under the separatory funnel, a stopcock closed, and a funnel at the top of the separatory funnel.

A tube used to pour liquids and powders in containers with small holes, having sides that slant inward and a broad opening just at top as well as a narrow aperture at the bottom: Through a funnel, pour the batter into the heated oil. funnel.

The steps that led to that conversion are tracked by a funnel. For instance, e-commerce businesses desire customers to make product purchases on their website. These are possible steps in their funnel: visited website, looked at merchandise, added item to basket, and made purchase.

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Answer:

A option

Explanation:

water gets split in photosynthesis

The partial pressure of each gas in the mixture is 443.91 mm of Hg and  407.09 mm of Hg, respectively.

In a gas mixture, each constituent gas has a partial pressure equal to the notional pressure of its constituent gases as if they alone occupied the entire volume of the original mixture at the same temperature.

Given,

mass of hydrogen = 0.482 gram

mole = 0.482 / 2

        = 0.241

mass of helium = 0.441

mole = 0.441/2

        = 0.221

Total mole = 0.241 + 0.221

                  = 0.462

total pressure = 851 mm of Hg

The partial pressure of hydrogen = 0.241 /  0.462 ×  851

                                                         = 443.91 mm of Hg

The partial pressure of helium = 0.221 /  0.462 ×  851

                                                         = 443.91 mm of Hg

                                                        = 407.09 mm of Hg

Partial pressure is defined as a vessel filled with multiple gases, each exerting pressure. The pressure of each gas in the container is called partial pressure. The concept of partial pressure comes from the fact that each particular gas constitutes part of the total pressure and that part is the partial pressure of that gas.

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The orbitals shown below are utilized in the molecule are B and D(as shown in the image).

To determine which orbitals are utilized in a molecule using Valence Bond Theory, you need to look at the hybridization of the atoms involved in the bond formation. Hybridization is the process of mixing atomic orbitals to form new hybrid orbitals that can better explain the bonding in a molecule. The hybrid orbitals are labeled according to the type and number of atomic orbitals that were mixed together.

In general, the hybrid orbitals utilized in a molecule depend on the type of bonds present (sigma, pi, etc.) and the geometry of the molecule. Once you determine the hybridization of the atoms involved in a bond, you can then identify which atomic orbitals were mixed together to form the hybrid orbitals. The hybridization involved in the given complex molecule is sp³ and sp₄. Hence, option B and D are correct.

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--The complete question is, An organic chemist synthesizes the molecule below: (image attached) According to Valence Bond Theory, which of the orbitals shown below are utilized in the molecule? --

Answer

2,8,18,18,1

Explanation:

Answer:

The answer would be 0.65625