a parasitic skin infection a drug to treat

Answer:

1.a

2. b

Explanation:

Distillation is a process whereby a mixture of liquids having different vapor pressures is separated into its components. At first one might think that this would be quite simple: if you have a solution consisting of liquid A that boils at 50°C and liquid B with a boiling point of 90°C, all that would be necessary would be to heat the mixture to some temperature between these two values; this would boil off all the A (whose vapor could then be condensed back into pure liquid A), leaving pure liquid B in the pot. But that overlooks that fact that these liquids will have substantial vapor pressures at all temperatures, not only at their boiling points.

source: https://chem.libretexts.org/Bookshelves/General_Chemistry/Book%3A_Chem1_(Lower)/08%3A_Solutions/8.09%3A_Distillation

4) Ne

Chemistry

Atomic Structure

The most stable (unreactive) elements are found in group 18. They are known as the Noble Gases.

Noble Gases are inert, meaning they do not react easily with other elements. The reason is because their valence electron shells are filled.

Therefore, our best answer is 4) Ne.

Answer:

\(\boxed {\boxed {\sf 4. \ Ne }}\)

Explanation:

On the Periodic Table, the last group of elements are the Noble Gases. These are the most unreactive or stable elements.

According to the Octet Rule, atoms always want to have 8 valence electrons. The Noble Gases already satisfy this rule and have full outer shells, therefore they don't react with other elements often.

The Noble Gases are helium (He) , neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), radon (Rn), and oganesson (Og).

The only answer choice that is a Noble Gas is 4. Ne

Organism word is used to refer to a group of organ systems working together. Hence, option A is correct.

In biology, the smallest unit can live on its own and that makes up all living organisms and the tissues of the body.

An organ system is two or more organs working together to perform a specialized function.

Hence, organism word is used to refer to a group of organ systems working together.

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Answer:

4%

Explanation:

i had the same question

The waves that  has the greatest wavelength is Wavelength shown with 1 wavelength stretched over a long distance.

A wave could be a disturbance or variety that voyages through a medium or space, carrying vitality without transporting matter. Waves can take different shapes and happen totally different sorts of waves, counting mechanical waves and electromagnetic waves.

Mechanical waves require a medium to propagate, meaning they require a substance like water, discuss, or a strong fabric to transmit the wave. Illustrations of mechanical waves incorporate water waves, sound waves, and seismic waves. In these waves, particles of the medium sway or vibrate in a design, exchanging energy from one molecule to another.

Electromagnetic waves, on the other hand, don't require a medium and can travel through vacuum, such as in space. Electromagnetic waves comprise of electric and attractive areas swaying opposite to each other and to the heading of wave engendering. Illustrations of electromagnetic waves incorporate obvious light, radio waves, microwaves, infrared waves, bright waves, X-rays, and gamma beams.

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Answer:

There are 8 electrons in the last level. Because of the octet rule.

Answer:

This idea helps students explain why more rain forms over West Ferris than East Ferris. ... Therefore, when students explain that water vapor condenses higher in the atmosphere, they are actually explaining that water vapor condenses high in the troposphere, which is relatively low in the atmosphere.

Explanation:

The mass of SO2 needed to produce 530 g of SO3 is 4241.2grams.

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Answer:

the intellectual and practical activity encompassing the systematic study of the structure and behaviour of the physical and natural world through observation and experiment.

Explanation:

When the soil is saturated in a gently sloping area, any additional rainfall in the area will most likely become surface run off.

Super saturation occurs with a chemical solution when the concentration of a solute exceeds the concentration specified by the value equilibrium solubility.

Additional water into the soil will cause the soil to be super saturated and eventually runs off due to the steepness of the area.

Thus, when the soil is saturated in a gently sloping area, any additional rainfall in the area will most likely become surface run off.

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The partial pressure of hydrogen in the collected gas sample is 733.0 mm Hg (calculated by subtracting the partial pressure of water, 17.0 mm Hg, from the total atmospheric pressure, 750.0 mm Hg).

When a gas is collected over water, the presence of water vapor affects the total pressure observed. In this case, the total atmospheric pressure is given as 750.0 mm Hg, and the partial pressure of water vapor at 19.5°C is 17.0 mm Hg.

To determine the partial pressure of hydrogen, we need to subtract the partial pressure of water vapor from the total atmospheric pressure. Partial pressure refers to the pressure exerted by an individual gas component in a mixture. In this scenario, the collected gas is primarily hydrogen, with water vapor being the other component.

By subtracting the partial pressure of water vapor (17.0 mm Hg) from the total atmospheric pressure (750.0 mm Hg), we can find the partial pressure of hydrogen:

Partial pressure of hydrogen = Total atmospheric pressure - Partial pressure of water vapor

Partial pressure of hydrogen = 750.0 mm Hg - 17.0 mm Hg

Partial pressure of hydrogen = 733.0 mm Hg

Therefore, the partial pressure of hydrogen in the collected gas sample is 733.0 mm Hg.

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The two solutions that have similar solubilities at 40°C will be Na₂HAsO₄ and Na₂SO₄.

It is the ability of a solute to be dissolved, especially in water.

As the temperature increases the solubility of the gas generally decreases"

According to given information and graph attached as reference ;

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Answer:

it's D 240

Explanation:

I took the

To build a model of the Earth, several physical aspects must be taken into account, such as the composition of its interior and its external appearance.

To draw a scale model of the Earth we must take into account different aspects so that it has the most similar appearance to our planet.

To draw the Earth we must know that the shape of our planet is not a sphere but rather a geoid that has irregularities and is flattened.

Additionally, we must take into account the physical characteristics such as:

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Answer:

time = 1.92 min

Explanation:

By knowing that

\(R_R = K_R [A]^{1} = \frac{[A]}{time}\)  

Where: RR: rate of forward reaction, KR: rate constant, [A]: A concentration

in the previous equation, [A] is cancelled, then:

\(K_R = \frac{1}{time} \\ \\\)


\(8.70\times10^{-3} = \frac{1}{time}\)


Then, time = 114.94 seconds = 1.92 minutes


hope you find this easy to understand....

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Answer:

Noble gases are nonreactive, nonmetallic elements in group 18 of the periodic table. Noble gases are the least reactive of all elements. That's because they have eight valence electrons, which fill their outer energy level.

Answer:

4.Ti

Explanation:

Because it is a group VIII element or an inert gas. or noble gas (Inert gas)

- It has 8 full valence electrons, making it a non-reactive gas.

Answer:

* \(\Delta T_B=1.286\°C\)

* \(m=2.5m\)

* \(n=0.05mol\)

* \(M=59.76g/mol\)

Explanation:

Hello,

In this case, considering the boiling point rise problem, we consider its appropriate equation:

\(\Delta T_B=imK_b\)

Whereas i is the van't Hoff factor that for this nonvolatile solute is 1, m is the molality, Kb the boiling point constant of water as it is the solvent and ΔT the temperature difference. In such a way, with the given information we obtain:

- ΔT:

\(\Delta T_B=101.286\°C-100.000\°C\\\\\Delta T_B=1.286\°C\)

- Molality (mol/kg):

\(m=\frac{\Delta T_B}{i*K_b}=\frac{1.286\°C}{1*0.512\°C/m}\\ \\m=2.5m\)

- Moles for 20.02 g (0.02002 kg) of water:

\(n=2.5mol/kg*0.02002kg\\\\n=0.05mol\)

- Molar mass:

\(M=\frac{mass}{moles}=\frac{3.005g}{0.050mol} \\\\M=59.76g/mol\)

Best regards.

Answer:

First, we need to determine the molar mass of HCl.

The molar mass of HCl = the mass of hydrogen (1.008 g/mol) + the mass of chlorine (35.45 g/mol) = 36.45 g/mol.

Next, we can use Avogadro's number (6.02 x 10^23 molecules/mol) to convert the number of molecules to moles:

6.02 x 10^24 molecules / 6.02 x 10^23 molecules/mol = 10 moles

Finally, we can use the molar mass to convert moles to grams:

10 moles x 36.45 g/mol = 364.5 grams

Therefore, the mass of 6.02 x 10^24 molecules of HCl is 364.5 grams.

The factors that will cause an increase in the gas's solubility are:

1) The volume of the gas above the solution decreases when solution is added with a syringe.

This will increase the pressure of the gas above the solution, causing more gas molecules to dissolve into the solvent.

2) The temperature of the flask is raised.

An increase in temperature will cause the gas molecules to move faster and collide more frequently with the solvent molecules, increasing the solubility of the gas.

3) A reaction occurs between the gas solute and the solvent.

If the gas solute reacts with the solvent to form a new compound, the solubility of the gas will increase as the reaction will remove gas molecules from the gas phase and into the solution.

The other two factors (using a syringe to add a gas other than the solute and increasing the volume of the gas above the solution by removing solution with a syringe) will not cause an increase in the gas's solubility. Adding a gas other than the solute will not affect the solubility of the original gas solute, and increasing the volume of the gas above the solution will decrease the pressure of the gas, causing less gas molecules to dissolve into the solvent.

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The number of atoms present in the FCC unit cell is 4. The Avogadro number is a constant and its value is 6.022 × 10²³.

The density of a crystalline substance with the molar mass 'M', unit cell edge length 'a', Molar mass 'M', the number of atoms present per unit cell 'Z' is given by the equation:

Density = ZM / a³N₀

The molar mass of silver = 107.86 g/mol

408.7pm = 408.7 × 10⁻¹² m

10.5g/cm³ = 10500 kg /m³

N₀  =  ZM / a³d

= 4 ×  107.86 / (408.7 × 10⁻¹²)³ × 10.5 × 10³

= 6.025 × 10⁻²⁴

Thus the Avogadro’s number is 6.025 × 10⁻²⁴.

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Answer:

1.005 x \(10^{1}\)

Explanation:

A summary of the C4 plants is given below:

The Hatch-Slack pathway, also known as C4 carbon fixation, is one of three recognized photosynthetic carbon fixation pathways in plants.

The names are a result of Marshall Davidson Hatch and Charles Roger Slack's discovery in the 1960s that some plants, when given 14CO2, integrate the 14C label into four-carbon molecules first.

Corn, sorghum, sugarcane, millet, and switchgrass are examples of C4 plants. C3 plants are often more prolific and efficient at photosynthesizing in cooler conditions because C4 morphological and biochemical adaptations demand more energy and resources from the plant.

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The two atoms are isotopes of each other are Si with a mass number of 27 and an atomic number 14, and Mg with a mass number of 25 and an atomic number of 12. The correct option is A.

Isotopes are atoms with the same number of protons but differing numbers of neutrons.

They differ in mass, which affects their physical characteristics even if they have nearly identical chemical properties.

An isotope is one of two or more chemical elements that exist in different forms. Varied isotopes of an element share the same atomic number and protons in their nuclei, giving them the same atomic weight.

However, each elemental isotope has a different amount of neutrons, which changes its atomic weight.

They can be referred to as isotopes because Si, which has a mass number of 27 and an atomic number of 14, and Mg, which has a mass number of 25 and an atomic number of 12, both have 13 protons.

Thus, the correct option is A.

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Answer:

Explanation:

If a zero is found between significant digits, it is significant

The percent difference between the first two trials is 8.3% and final outcome would be an average molarity of 0.108 M.

To calculate the percent difference between the first two trials, use the formula:

% Difference = |(Value 1 - Value 2) / ((Value 1 + Value 2) / 2)| x 100%

% Difference = |(0.104 M - 0.113 M) / ((0.104 M + 0.113 M) / 2)| x 100%

% Difference = |-0.009 M / 0.1085 M| x 100%

% Difference = 8.3%

The percent difference between the first two trials is 8.3%.

To find the average molarity, add the three calculated concentrations together and divide by the number of trials:

Average Molarity = (0.104 M + 0.113 M + 0.108 M) / 3

Average Molarity = 0.108 M

Based on the lab procedures guidelines, the average molarity would be the most accurate representation of the unknown concentration of HCI. Therefore, the average molarity of 0.108 M would be the final result.

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Answer:

597-620 nm

Explanation:

I thought u were talking about the fruit before lol.