I need help with this pls

The property of water that allows it to act as a transport medium will be water is a solvent. Option D is correct.

Water will be often referred to as the "universal solvent" because it has the ability to dissolve a wide range variety of substances. This property is due to the polar nature of the water molecules. Water molecules have a slight positive charge on the hydrogen atoms and a slight negative charge on the oxygen atom, creating a polar molecule.

When substances dissolve in water, the polar water molecules surround the solute particles, breaking the ionic or molecular bonds that hold the solute together. This allows the solute to be transported and dispersed throughout the water, making water an effective medium for transporting dissolved substances.

Adhesion refers to the ability of water to stick to other surfaces, while the high heat of evaporation and high heat capacity refer to water's ability to absorb and retain heat. The property mentioned in option, the frozen form of water being less dense than the liquid form (known as the expansion of water upon freezing), is related to its unique crystal lattice structure and not directly related to acting as a transport medium.

Hence, D. is the correct option.

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The reaction of solid sodium and chlorine gas is a single displacement reaction resulting in sodium chloride.

Given that solid sodium reacts with chlorine gas to form sodium chloride also called as table salt.

The reaction is as follows: \(2Na + Cl2 -- > 2NaCl\)

This is an example of a single displacement reaction, also known as a substitution reaction. In this type of reaction a more reactive element displaces a less reactive element from a compound.

Here, the sodium (a more reactive element) displaces the chlorine (a less reactive element) from the chloride compound, resulting in sodium chloride (table salt). The sodium atom donates one of its electrons to the chlorine molecule, forming a sodium cation (Na+) and a chloride anion (Cl-). They are then attracted to each other, forming the ionic compound sodium chloride.

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Answer:

Fluorine    

Chlorine

Bromine

Iodine

Boiling point increases as you go down the group v11

Explanation:

The elements of Group VII  are the halogens consisting of f fluorine (F), chlorine (Cl), bromine (Br), iodine (I).  All of which are non metals and exists  as diatomic molecules - F2, Cl2, Br2, I2 with  intermolecular attractions between the two molecules of each element held by Van der Waals dispersion force.

Moving down the group, the size of the atoms increases in size from Fluorine, F2 and Chlorine, Cl2 which are gases to Bromine , Br2 which exists as a liquid to solid, Iodine, I2. This attributes to the increasing in Strength of the Van der Waals forces as you go down the group. In order to break the vanderwaals forces , More heat energy is required to change thier states  leading to the increase in  boiling point going down the group.

Fluorine    

Chlorine

Bromine

Iodine

Boiling point increases as you go down the group

Answer:

Option D. fluorine-18

Explanation:

The attached photo gives the explanation.

In the attached photo, A zX represent the atom that will undergo beta decay to produce oxygen–18.

After the calculation, A zX was found to be fluorine–18.

Answer:

A mixture

Explanation:

Yes

Answer:

mixture fosho

Explanation:

Answer:

76 grams is the correct answer to this question

A. The order of nucleotide bases within a gene determines the arrangement of amino acids in a protein. The genetic code, which is made up of the bases in DNA, dictates the order in which the amino acids will be combined to form proteins.

The DNA nucleotide base sequence is translated into a complementary sequence of bases in mRNA during the protein production process. Then, using the mRNA as a template, a protein chain is put together, with each triplet of bases (known as a codon) designating a certain amino acid. The ribosomes, which are in charge of protein synthesis, assemble the amino acids in the order dictated by the mRNA rather than choosing the amino acid sequence of a protein. Although necessary for protein synthesis, the availability of amino acids in the cell cytoplasm does not affect the precise amino acid sequence of a protein.

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Answer:

× = and

Explanation:

person and person

Ammonium chloride is used as an electrolyte in dry cells. D. The solution is acidic is correct.

The salt NH4Cl is acidic. Since NH4Cl has a pH between 4.5 and 6 and a pKa of 9.24, it is just slightly acidic. It is a salt of hydrochloric acid and ammonia, which are both strong acids and weak bases.

NH4Cl is acidic because a salt's pH is determined by how acidic or basic its constituent constituents are. A salt that takes its qualities from its constituents, namely an acid and a base, is created when an acid and a base react.

This reaction is known as neutralization. The potency of the acid and base that combine to make salt determines whether it is acidic or basic.

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No, applying pressure to monoclinic sulfur is not expected to make it more stable than rhombic sulfur.

Monoclinic is a type of crystal structure which is characterized by having two unequal axes, where one is inclined with respect to the other. It is a type of symmetry that is less common than the other types of crystal structures, such as cubic or tetragonal. Monoclinic crystals have three different axes, two of which are unequal in length and one of which is inclined with respect to the other two. This type of crystal structure can result in a variety of different shapes, such as rhombic, prismatic, and acicular, depending on the angle of the inclined axis.

This is because the density of monoclinic sulfur is already lower than that of rhombic sulfur, and increasing the pressure would further decrease its density, thus making it less stable than the rhombic form.

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Chemical equilibrium is a dynamic equilibrium that is affected by changes in temperature, concentration and pressure

Chemical equilibrium is a dynamic state in a chemical reaction in which the rate of forward reaction is equal to the rate of backward reaction.

For a reaction in equilibrium, the following factors affect equilibrium:

The principle of chemical equilibrium states that in an isolated system in equilibrium, equilibrium will shift to annul any constraint applied in the system.

Therefore, chemical equilibrium is dynamic and is affected by temperature, concentration and pressure.

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You need 0.25 grams of magnesium phosphate to make 250 mL of a 0.10% (m/v) solution.

To calculate the grams of solute required to make 250 mL of 0.10% magnesium phosphate (m/v), you'll first need to determine the mass of the solute in the solution.

1. Convert the percentage to a decimal: 0.10% = 0.0010.
2. Multiply the decimal by the volume of the solution: 0.0010 x 250 mL = 0.25 grams.
3. The result, 0.25 grams, is the mass of magnesium phosphate needed to make 250 mL of a 0.10% (m/v) solution.

In summary, to make a 250 mL solution with a 0.10% (m/v) concentration of magnesium phosphate, you will need to dissolve 0.25 grams of the solute in the solvent.

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The CT scan operates at a very short wavelength of 1.78 x 10^-11 meters.

Electromagnetic radiation, including visible light, radio waves, X-rays, and gamma rays, travels through space as waves with a particular wavelength and frequency. The wavelength of the radiation is the distance between two adjacent peaks or troughs in the wave, while the frequency is the number of waves passing a point per unit time.

The relationship between wavelength and frequency is given by the equation:

c = λf

where c is the speed of light (approximately 3 x 10^8 meters per second), λ is the wavelength, and f is the frequency. This equation shows that the wavelength and frequency of electromagnetic radiation are inversely proportional.

For the MRI scan, the given frequency is 8.5 x 10^7 Hz. Using the above equation, we can calculate the wavelength as:

λ = c/f = 3 x 10^8 m/s / (8.5 x 10^7 Hz) = 3.53 meters

So, the MRI scan operates at a wavelength of 3.53 meters.

For the CT scan, the given frequency is 1.69 x 10^19 Hz. Using the same equation, we can calculate the wavelength as:

λ = c/f = 3 x 10^8 m/s / (1.69 x 10^19 Hz) = 1.78 x 10^-11 meters

So, the CT scan operates at a very short wavelength of 1.78 x 10^-11 meters. Such high frequency radiation is typically in the X-ray region of the electromagnetic spectrum, and is used in CT scans to produce detailed images of the inside of the body.

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Answer:

6 is the right answer I know cause I like science

Answer:

Answer:

wheres the options?

Explanation:

Mass of SnF₂ produced : 35.634 g

Reaction

Sn+2HF⇒SnF₂+H₂

mol Sn (Ar 118.710 g/mol) :

\(\tt \dfrac{45}{118.710}=0.379\)

mol SnF₂ = mol Sn = 0.379

mass SnF₂ (MW=156.69 g/mol) :

\(\tt 0.379\times 156.69=59.39~g\)⇒theoretical

\(\tt \%yield=\dfrac{actual}{theoretical}\times 100\%\\\\60\%=\dfrac{actual}{59.39}\times 100\%\\\\actual=0.6\times 59.39=35.634~g\)

Two moles of magnesium chloride contain two moles of magnesium atoms.


The formula of magnesium chloride is MgCl₂, which means that one molecule of magnesium chloride contains one atom of magnesium and two atoms of chlorine. Two moles of MgCl₂ contains 2 moles of Mg and 4 moles of Cl. However, the question is asking about the number of moles of magnesium atoms, not moles of magnesium chloride molecules.

Since one molecule of MgCl₂ has one atom of magnesium, two moles of MgCl₂ have two moles of magnesium atoms. Therefore, two moles of magnesium chloride contain two moles of magnesium atoms. This can also be confirmed by looking at the balanced chemical equation for the reaction of magnesium chloride with other substances, where the coefficient of Mg is always equal to that of MgCl₂.

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Answer:

its not cear to answer this question

Answer:

54.(4)° C (the 4 in the parentheses means the 4 goes forever), 327.594°K

Explanation:

When you convert 130°F to °C, you will get 54.(4)°C, and the 4 in the parentheses goes forever, and 130°F to °K is 327.594°K, hope it helps!

1) Write the chemical equation.

2) List the known and unknown quantities.

Sample: H2SO4

Volume: 33.98 mL.

Concentration: unknown

Titrant: LiOH

Volume: 18.19 mL = 0.01819

Concentration: 1.35 M

3) Find moles of LiOH

3.1- Set the equation

3.2- Plug in the values

The number of moles of LiOH in the reaction is 0.0246.

4) Find moles of H2SO4

The molar ratio between H2SO4 and LiOH is 1 mol H2SO4: 2 mol LiOH.

5) Molarity of H2SO4

Sample: H2SO4

Moles: 0.01228

Volume: 33.98 mL.

5.1- Convert mL to L.

1 L = 1000 mL

5.2- Set the equation to find molarity.

The molarity of the sample is 0.3614 M H2SO4.

lago claro todo esta lleno de basura

Answer:

I think its about the same tempurature so i would say 32 degrees

Explanation:

Notice that the curve shows periods where the temperature does not change. These plateaus occur because energy is being used to changing the substance's phase, not raise the temperature. This is why water will not get hotter as it is boiling.

Noble gases are very less reactive. The correct is noble gases e) do not bond.

The noble gases are the very less reactive. The valence shell or the outer most shell are fully filled and this is the reason it can not share the electrons or gain the electrons to form the bond. The noble gas are belongs to the group 18 in the periodic table. The noble gases are : helium, neon, argon, krypton, xenon and the radon. They are non reactive gases and called as inert.

Thus, The noble gases don not form the chemical bond and they are very stable.

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Explanation:

Hydrogen = H

Nitrite = NO₂⁻

The compound formed by Hydrogen and Nitrite is;

Name = Nitrous Acid

Formular = HNO₂

Answer:

Freezing or boiling water

Explanation:

Plastic takes time to degrade which means it has great longevity. Plastic does not break as easily as glass or other materials. It lasts long and offers great service. Plastic storage containers offer greater flexibility than any other packaging materials.

The freezing point for this solution is 7.29 °C.

To calculate the freezing point for this solution, we need to use the formula:

ΔTf = Kf × molality

where ΔTf is the change in freezing point, Kf is the freezing point depression constant for water (-1.86 °C/m), and molality is the concentration of solute in moles per kilogram of solvent.

First, we need to calculate the molality of the solution. We know that there are 0.48 mol of ethylene glycol and 0.17 mol of KBr in 166 g of water. We can use this information to calculate the total number of moles of solute in the solution:

total moles of solute = moles of ethylene glycol + moles of KBr
total moles of solute = 0.48 mol + 0.17 mol
total moles of solute = 0.65 mol

Next, we need to calculate the mass of the solvent (water) in kilograms:

mass of solvent = 166 g / 1000
mass of solvent = 0.166 kg

Now we can calculate the molality:

molality = total moles of solute / mass of solvent
molality = 0.65 mol / 0.166 kg
molality = 3.92 mol/kg

Finally, we can use the formula to calculate the freezing point depression:

ΔTf = Kf × molality
ΔTf = (-1.86 °C/m) × 3.92 mol/kg
ΔTf = -7.29 °C

The freezing point depression tells us how much the freezing point of the solution has been lowered compared to pure water. To calculate the actual freezing point, we need to subtract the freezing point depression from the freezing point of pure water (0 °C):

freezing point = 0 °C - ΔTf
freezing point = 0 °C - (-7.29 °C)
freezing point = 7.29 °C

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Answer:

I hope it helps

Explanation:

Answer:

I hope it's helpful for you...

Explanation:

water traps heat and holds it deep inside the ocean .....

I think it's correct answer

In an ecosystem, water  traps heat and holds it deep inside the ocean there by heating earth.

Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.

Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.

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Answer:

This question is incomplete

Explanation:

This question is incomplete but one can assume the answer from the definition of quantum mechanics. Quantum mechanics is the science that describes particles in nature at the atomic and subatomic particle (electron, proton and neutron) level. Thus it can be assumed that atoms and subatomic particles are used to broadly describe particles.

The adjacent nucleotides are bound to each other through a phosphodiester bond in a nucleic acid.

Nucleic acid is a biopolymer made up of nucleotide monomers that make up nucleic acid chains. The nucleotide's three components are a five-carbon sugar, a phosphate group, and a nitrogenous base. Nucleic acids are present in all living cells, including viruses and bacteria, and they play a critical role in storing, transmitting, and expressing genetic information. RNA and DNA are two types of nucleic acids.

The phosphate group in one nucleotide forms a phosphodiester bond with the hydroxyl group on the sugar molecule of the next nucleotide in line in nucleic acids. This reaction is carried out by removing a molecule of water, resulting in a strong covalent bond between two nucleotides. These bonds make up the sugar-phosphate backbone of a nucleic acid chain, which is fundamental to its structure.

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