consider three solid surfaces made with the types of polymeric molecules shown in the image below. which of the surfaces is likely to be wetted by water ( molecules will stick to them)?

Lithium Iodide:

~formed by the reaction of hydroxide with hydroiodic acid

Hope this helped you, have a good day bro cya)

Answer:

True

Explanation:

IT IS TRUE WIWJJWOWIWHW

A 30-day supply of Levoxyl at a dosage of one 13 μg tablet per day contains 0.39 mg of Levoxyl.

For a patient taking one 13 μg tablet of Levoxyl per day, the total amount of levothyroxine they are receiving is 13 micrograms. To calculate the total amount in a 30-day supply, we simply multiply this amount by 30.

13 μg/tablet x 1 tablet/day x 30 days = 390 μg

Note that the microgram (μg) is a unit of mass equal to one millionth of a gram, while the milligram (mg) is a unit of mass equal to one thousandth of a gram. To convert μg to mg, we divide by 1000:

390 μg / 1000 = 0.39 mg

Levoxyl is a medication used to treat hypothyroidism, a condition where the thyroid gland doesn't produce enough hormones to regulate the body's metabolism. The active ingredient in Levoxyl is levothyroxine sodium, which is a synthetic form of the hormone thyroxine (T4).

Levoxyl tablets are available in several strengths, ranging from 25 mcg to 300 mcg. The recommended dosage depends on the patient's age, weight, and the severity of their hypothyroidism. In general, adults with normal thyroid function usually require about 1.6 mcg of levothyroxine per kilogram of body weight per day.

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The correct name of the molecule depends on the arrangement of the substituents on the cyclopentane ring.

If the chlorine atom and the two methyl groups are on the same side of the ring, the molecule is called cis-1-chloro-3,4-dimethylcyclopentane.

If the chlorine atom and the two methyl groups are on opposite sides of the ring, the molecule is called trans-1-chloro-3,4-dimethylcyclopentane.

Therefore, both "cis-1-chloro-3,4-dimethylcyclopentane" and "trans-1-chloro-3,4-dimethylcyclopentane" are correct names for the molecule, and two of the options provided in the question are acceptable.

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Answer:

about 0.2 mL

Explanation:

To find the volume, you take the mass and divide it by the density

Entropy is a thermodynamic function that measures the randomness or disorder of a system. It is a measure of the number of possible microstates that a system can have.

A system with high entropy has many possible microstates, while a system with low entropy has few possible microstates. Entropy is often defined as the sum of the internal energy of a system and the product of its pressure and volume.

However, this definition is not very helpful for understanding what entropy actually means. A better definition of entropy is that it is a thermodynamic function that increases with the number of energetically equivalent ways to arrange the components of a system.

In other words, entropy measures how spread out the energy is in a system. A system with high entropy has its energy spread out over many different microstates, while a system with low entropy has its energy concentrated in a few microstates.

Entropy is always increasing in the universe. This is because the universe is constantly evolving and becoming more disordered. The second law of thermodynamics states that the entropy of an isolated system can never decrease. This means that the entropy of the universe is always increasing.

Entropy is a very important concept in thermodynamics and it has many applications in physics, chemistry, and biology. It is also a key concept in information theory and computer science.

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The number of the carbon atoms are in the one mole of the CH₄, methane molecule is one carbon atom. It also contains the four hydrogen atom.

The given chemical compound is the methane . The chemical formula of the methane molecule is the CH₄. The methane molecule made up of the two elements. The carbon and the hydrogen . The methane molecules contains the one carbon atom and the four hydrogen atom.

The mole of the methane , CH₄ = 1 mole

The molar mass of the methane is 16 g/mol.

The 1 mole of the methane contains = one carbon atom + 4 hydrogen atoms.

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The given alkene can undergo ozonolysis in the presence of ozone (O3) followed by reduction with zinc (Zn) and water (H2O) to yield two products.

The ozonolysis reaction cleaves the double bond in the alkene and generates two carbonyl compounds, which can then be reduced by zinc to form aldehydes or primary alcohols depending on the reaction conditions.

The ozonolysis of the given alkene, 2-methyl-2-pentene, results in the formation of two carbonyl compounds: propanal and 2-methylpropanal. These carbonyl compounds can then undergo reduction with zinc and water to form the corresponding aldehydes or primary alcohols.

The reduction of propanal with zinc and water results in the formation of propan-1-ol, which is a primary alcohol. The reaction involves the addition of hydrogen atoms to the carbonyl group of propanal, followed by the removal of the resulting oxygen atom as water. The reduction of 2-methylpropanal with zinc and water results in the formation of 2-methylpropan-1-ol, which is also a primary alcohol. The reduction mechanism is similar to that of propanal, but with the addition of hydrogen atoms to the carbonyl group of 2-methylpropanal instead.

In summary, the products formed when 2-methyl-2-pentene is treated with ozone followed by zinc and water are propan-1-ol and 2-methylpropan-1-ol. These products are formed by ozonolysis of the alkene to generate carbonyl compounds, followed by reduction of the carbonyl compounds to primary alcohols with zinc and water. This reaction demonstrates the versatility of ozonolysis and reduction reactions in synthesizing aldehydes and primary alcohols from alkenes, which are important building blocks in organic chemistry.

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Ans

1.83 metres

Explanation:

1 830 000micrometres to metres

1 830 000/1 000 000

=1.83m

Molecular formula is n times the empirical formula, where n is integers 1,2,... The empirical formula is F\(_3\)N\(_4\)O\(_7\). Therefore, the molecular formula of the given compound is F\(_6\)N\(_8\)O\(_{14}\).

Molecular formula is a chemical formula for a compound existing as discrete molecules that gives the total number of atoms of each element in a molecule.

Number of gram atoms in compound and Divide by smallest Number of gram atoms in compound

F=(25.31%)÷18=1.40÷1.40=3

N=(24.82%)÷14=1.77÷1.40=4

O=(49.87%)÷16=3.11÷1.40=7

The atomic ratio is 1:1.21:2.2

Whole number  is 1:1:2

Empirical formula corresponding to this whole number is F\(_3\)N\(_4\)O\(_7\).

molecular formula mass= n ×empirical formula mass

450.08g= n ×225.04

n= 2

molecular formula= F\(_6\)N\(_8\)O\(_{14}\)

Therefore, the molecular formula of the given compound is  F\(_6\)N\(_8\)O\(_{14}\).

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The molar mass of Mg3(PO4)2 can be calculated by adding the atomic masses of magnesium (Mg), phosphorus (P), and oxygen (O) atoms in the compound.

Molar mass of Mg = 24.31 g/mol
Molar mass of P = 30.97 g/mol
Molar mass of O = 16.00 g/mol

Mg3(PO4)2 has three Mg atoms, two PO4 groups, and each PO4 group contains one P atom and four O atoms. Therefore, the molar mass of Mg3(PO4)2 can be calculated as follows:

3 x Mg molar mass + 2 x (P molar mass + 4 x O molar mass)
= 3 x 24.31 g/mol + 2 x (30.97 g/mol + 4 x 16.00 g/mol)
= 3 x 24.31 g/mol + 2 x (30.97 g/mol + 64.00 g/mol)
= 72.93 g/mol + 2 x 94.97 g/mol
= 72.93 g/mol + 189.94 g/mol
= 262.87 g/mol

Therefore, the molar mass of Mg3(PO4)2 is 262.87 g/mol. The closest answer choice is 262.9 g.

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The statement "The notion that converting the zeolite into a magnetic form would enhance its stability is incorrect" and thus false statement.

Zeolite is a crystal of hydrated silicates that contain alkaline and earthy metals. Zeolites are naturally found in rocks, soils, and sediments. They can also be artificially manufactured for use in a variety of applications. Zeolites have a porous structure that makes them an effective adsorbent. In water filtration, zeolites are used to remove heavy metals and other impurities. They are also used in the petrochemical industry to purify petroleum.Zeolites' StabilityZeolites are stable, but they can be further stabilized by modifying their properties.

The stability of zeolites can be improved by converting them into a magnetic form. Magnetic zeolites have magnetic properties that make them more stable in the presence of external factors such as temperature changes and pH. Magnetic zeolites can be synthesized by introducing magnetic particles into the zeolite structure. The idea of further converting the zeolite to be magnetic is not to make it more stable but to make it more effective in adsorption and separation processes.

The magnetic properties of zeolites make them useful in magnetic separation processes where they can be easily separated from other materials. This makes them more efficient than traditional zeolites that require more complex separation methods.In conclusion, while magnetic zeolites are more effective in adsorption and separation processes, their stability is not the primary reason for converting them to a magnetic form.

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Answer:

it is formed by covalent bonds. the oxygen atom shares one elctron with each chlorine atom, forming single covalent bonds ( cl — o — cl )

To determine the energy of a photon required for an electronic transition from the n=2 state to the n=5 state in a hydrogen atom, we can use the formula for the energy of a photon:

E = ΔE = hc/λ

Where:

- E is the energy of the photon

- ΔE is the change in energy between the initial and final states

- h is Planck's constant (approximately 6.626 x 10^-34 joule-seconds)

- c is the speed of light (approximately 3 x 10^8 meters per second)

- λ is the wavelength of the photon

The energy difference between two energy levels in a hydrogen atom is given by the Rydberg formula:

ΔE = Rh * (1/n_f^2 - 1/n_i^2)

Where:

- ΔE is the change in energy

- Rh is the Rydberg constant (approximately 2.18 x 10^-18 joules)

- n_f is the final energy level (n=5 in this case)

- n_i is the initial energy level (n=2 in this case)

Substituting the values into the Rydberg formula:

ΔE = Rh * (1/5^2 - 1/2^2)

= Rh * (1/25 - 1/4)

= Rh * (4/100 - 25/100)

= Rh * (-21/100)

≈ -0.0218 * Rh

Now, we can substitute this change in energy value into the energy formula for the photon:

E = hc/λ = -0.0218 * Rh

Rearranging the equation to solve for λ:

λ = hc / E

Substituting the values for h, c, and E:

λ = (6.626 x 10^-34 joule-seconds * 3 x 10^8 meters per second) / (-0.0218 * Rh)

Calculating this expression will give us the wavelength of the photon required for the electronic transition.

Answer:

proton-27

electron-25

neutron-35

Explanation:

a. There are 0.1596 moles of NaCl in 0.3 L of NaCl stock solution.

b. There are 0.1596 moles of NaCl in 2.1 L of NaCl dilute solution.

c. The concentration of NaCl in the final solution is 0.076 M.

Molarity is said to be the number of moles of solute per liter of solution. For example, when salt is dissolved in water, the salt becomes the solute and the water becomes the solution. Since, one mole of sodium chloride weighs 58.44 grams and dissolving 58.44 grams of NaCl in 1 liter of water makes a 1 molar solution, abbreviated as 1M.

c. Let's calculate the concentration of NaCl in the final solution:

M₁V₁ = M₂V₂

M₁ = Initial concentration of NaCl (0.532 M)

V₁ = Initial volume of NaCl (0.3 L)

M₂ = Final concentration of NaCl

V₂ = Initial volume of NaCl (2.0 L)

0.532 × 0.3 = M₂ × 2.1

M₂ = (0.532 × 0.3)/2.1

M₂ = 0.076 M

a. To calculate number of moles in 0.3 L of NaCl stock solution.

Molarity = Mole of solute/Volume of solution

0.532 = Mole of NaCl/0.3

Mole of NaCl = 0.532×0.3

Mole of NaCl = 0.1596 mol

b. To calculate number of moles in 2.1 L of NaCl solution.

0.076 = Mole of NaCl/2.1

Mole of NaCl = 0.076×2.1

Mole of NaCl = 0.1596 mol

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mass of proton mp=1.672621898e-27 kg and 1 amu=1.66053904e-27kg so it’s just divition (1.672621898e-27 / 1.66053904e-27) =1.007276 amu

Answer:

hi

Explanation:

hi

The theoretical yield of Fe₂O₃ is 0.0059 moles and the percent Yield is 44.2%

Using stoichiometry to calculate the theoretical yield of Fe₂O₃:

From the balanced chemical equation, 4 moles of Fe react with 3 moles of O₂ to produce 2 moles of Fe₂O₃. Therefore, set up the following proportion:

3.4 g O₂ / 32 g/mol O₂ = x mol Fe₂O₃ / (2 mol Fe / 4 mol O₂ x 55.85 g/mol Fe)

Solving for x:

x = 3.4/32 x 4/3 x 1/55.85 x 2 = 0.0059 moles Fe₂O₃

Therefore, the theoretical yield of Fe₂O₃ is 0.0059 moles.

From the balanced chemical equation, 4 moles of Fe react with 3 moles of O₂ to produce 2 moles of Fe₂O₃. Therefore, for every 4 moles of Fe that react, expect to produce 2 moles of Fe₂O₃.

Using this information, set up the following proportion:

4 mol Fe / 55.85 g/mol Fe = 0.0059 mol Fe₂O₃ / x

Solving for x:

x = 55.85 x 0.0059 / 4 = 0.082 g Fe

Therefore, the theoretical yield of Fe is 0.082 g.

To calculate the percent yield, use the following formula:

Percent Yield = (Actual Yield / Theoretical Yield) x 100%

Substituting the values calculated:

Percent Yield = (0.0059 mol Fe₂O₃ / 0.082 g Fe) x 100% x (1.5 moles H₂O / 2 moles Fe₂O₃)

Percent Yield = 44.2%

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Answer:

The direction of the force it would exert on a positive charge.

Explanation:

The direction of an electrical field at a point is the same as the direction of the electrical force acting on a positive test charge at that point.

Hope this helps!! :)

Answer:

Volume

Explanation:

Volume is the quantity of three-dimensional space enclosed by a closed surface, for example, the space that a substance (solid, liquid, gas, or plasma) or 3D shape occupies or contains.[1] Volume is often quantified numerically using the SI derived unit, the cubic metre. The volume of a container is generally understood to be the capacity of the container; i.e., the amount of fluid (gas or liquid) that the container could hold, rather than the amount of space the container itself displaces. Three dimensional mathematical shapes are also assigned volumes. Volumes of some simple shapes, such as regular, straight-edged, and circular shapes can be easily calculated using arithmetic formulas. Volumes of complicated shapes can be calculated with integral calculus if a formula exists for the shape's boundary. One-dimensional figures (such as lines) and two-dimensional shapes (such as squares) are assigned zero volume in the three-dimensional space.

The volume of a solid (whether regularly or irregularly shaped) can be determined by fluid displacement. Displacement of liquid can also be used to determine the volume of a gas. The combined volume of two substances is usually greater than the volume of just one of the substances. However, sometimes one substance dissolves in the other and in such cases the combined volume is not additive.[2]

In differential geometry, volume is expressed by means of the volume form, and is an important global Riemannian invariant. In thermodynamics, volume is a fundamental parameter, and is a conjugate variable to pressure.

The dissolution of borax is endothermic process.

Endothermic reactions are chemical reactions in which the reactants absorb heat energy from the surroundings to form products. These reactions lower the temperature of their surrounding area, thereby creating a cooling effect.

Physical processes can be endothermic as well – Ice cubes absorb heat energy from their surroundings and melt to form liquid water (no chemical bonds are broken or formed).

When a chemical bond is broken, it is usually accompanied by a release of energy. Similarly, the formation of chemical bonds requires an input of energy. In endothermic process the heat is required.

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Answer:

D and A

Explanation:

While protons or electrons can be influenced by other charged particles, neutrons are not.

and

Neutrons are held tightly together with protons in the nucleus, so scientists could not observe the behavior of neutrons independently.

Answer:

0.342 moles

145 moles

0.0239 moles

0.498 moles

Explanation:

To solve this you only need to follow this rule:

N = n x Na. For solving this questions, you just need to divide this values for Avogadro's Coasting, and it's done. Hope it helped!

Answer:

The appropriate speed will be "20 m/s".

Explanation:

The given values are:

Wavelength,

λ = 5.0 M

Frequency,

f = 4 Hz

Now,

The speed of the wave will be:

⇒ \(V=f\times \lambda\)

On putting the values, we get

⇒     \(=4\times 5.0\)

⇒     \(=20 \ m/s\)

In order to reduce the risk of radiation exposure to individuals and environmental contamination, radioactive wastes are kept. The wastes' radioactivity decreases over time.

Large steel and concrete barrels that contain the garbage are typically properly sealed, although accidents and leaks can still happen. Cancerous growths can result from the severe negative impacts of nuclear waste on life.

Currently, dry casks are used to store all of the nuclear waste that a power plant produces over the course of its lifetime. Since 1987, Yucca Mountain in Nevada has been intended as a permanent disposal location for spent nuclear material.

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During sintering of high vapor pressure materials like Zinc (Zn), the underlying mechanism behind the transfer of metal from convexities (particle surface) to concavities (neck between particles) is surface diffusion.

Surface diffusion is a process in which atoms or molecules move across the surface of a material. In the case of sintering, the high temperature causes the atoms in the Zn particles to become mobile, allowing them to move across the surface of the particles and towards the necks between them.

As the Zn particles come into contact and begin to bond, the metal is transferred from the convexities to the concavities. This process is facilitated by the surface energy of the particles, which drives the transfer of metal towards areas of higher surface energy, such as the necks between particles.

Overall, the transfer of metal from convexities to concavities during sintering of high vapor pressure materials like Zn is driven by surface diffusion, which is facilitated by the surface energy of the particles.

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Explanation:

The electronic configuration of Selenium(Se) is 1s22s22p63s23p63d104s24p4 we remove electron .the electron configuration is1s22s22p63s23p63d104s24p4

the correct anwser is C

The electron configuration for Selenium is: 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁴.

Therefore, option c is correct.

The electronic configuration of an element is the filling of electron from lower energy level to the higher energy level. This is according to the Aufbau's principle.

Selenium has 34 electrons. The electronic configuration of Selenium can be determined by filling the electrons in increasing order of energy levels and sub-levels.

The electronic configuration of Selenium can be written as:

1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁴

Here, 4s is more energetic than 3d and thus occupies first.

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Answer:

numbers of molecules = 3×6.023×10-23