I need help answering that middle question

7.0329 x10 mm] -4.43x104m√ = 2. * 6029 * Ten ^ - 4 * m I Water has a surface tension of 72.0 mJ/m2 at normal temperature.

What kind of energy is needed to transform a water drop with a 2.20 mm diameter into four smaller drops with the same size?

At room temperature, water has a surface tension of 72.0 mJ/m2.

I'll try it out even if it seems like a physics challenge rather than a chemical one.

Surface area of the sphere equals 4 r2.

Radius, diameter, and volume of sphere are equal to (4/3)r3 2.20 mils = 1.10 mils

The four new droplets' surface tension differences with the original droplet are?

The energy needed to complete the specified task would be 0.00173 mary jane - 0.00114 w / mk = 0.00059 mary jane = 5.9x10-4 mJ.

(NOTE: I just saw Brian L's "comment," and this solution is in fact rather similar to his response of 6.4x10-4 mJ.)

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7.0329 x10 mm] -4.43x104m√ = 2. * 6029 * Ten ^ - 4 * m I Water has a surface tension of 72.0 mJ/m2 at normal temperature.

At room temperature, water has a surface tension of 72.0 mJ/m2.

I'll try it out even if it seems like a physics challenge rather than a chemical one.

Surface area of the sphere equals 4 r2.

Radius, diameter, and volume of sphere are equal to (4/3)r3 2.20 mils = 1.10 mils

The four new droplets' surface tension differences with the original droplet are?

The energy needed to complete the specified task would be 0.00173 mary jane - 0.00114 w / mk = 0.00059 mary jane = 5.9x10-4 mJ.

(NOTE: I just saw Brian L's "comment," and this solution is in fact rather similar to his response of 6.4x10-4 mJ.)

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Answer:

\(\huge\boxed{\sf no.\ of\ moles = 1.55\ moles }\)

Explanation:

Given:

Number of atoms = \(9.32 \times 10^{23}\) atoms

Avogadro's Number = \(6.023 \times 10^{23}\) atom / mol

Required:

Moles = ?

Formula:

\(\displaystyle No.\ of\ moles = \frac{no. \ of \ atoms }{avogadro's \ no.}\)

Solution:

\(\displaystyle no. \ of \ moles = \frac{9.32\times 10^{23}}{6.023 \times 10^{23}}\)

no. of moles = 1.55 moles

\(\rule[225]{225}{2}\)

Hope this helped!

The substance known as "desflurane," a halogenated ether, is frequently used as an anesthetic.

One of the more popular anesthetic gases, nitrous oxide has been in use for about 200 years. This substance, in contrast to several other anesthetics, can be used to both cause unconsciousness and manage pain. Compared to ether, chloroform is more poisonous and strong.

General anesthesia is most frequently used for major operations, such as knee and hip replacements, heart surgeries, and many sorts of surgical procedures to cure cancer, even though there are many different types and degrees of anesthetic drugs to keep you from feeling pain during surgery.

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Mass of the tin = 31.4g

The volume of tin = 4.3 \(cm^{3}\)

The density of tin = D

We know that

\(Density = \frac{Mass}{Volume} \\D = \frac{31.4}{4.3} \frac{g}{cm^{3} }\)

\(D = 7.302 g/cm^{3}\) ≈ \(10 g/cm^{3}\)

Measurement of density contrasts the mass of an object with its volume. High density refers to the amount of matter in a given volume of an object. We shall discover what density is in this post, along with its definition and measurement systems.

The density of a substance indicates how dense it is in a particular area. Mass per unit volume is the definition of a material's density.

In essence, density is a measurement of how closely stuff is packed.

It is a special physical characteristic of a certain thing. The Greek scientist Archimedes made the discovery of the density principle.

If you are familiar with the formula and the relevant units, calculating density is simple. The letter D can also be used to signify density instead of the symbol.

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Answer:

1) Oxidation-Reduction (Redox) Reaction

2) Combustion Reaction

3) Decomposition Reaction

4) Synthesis Reaction

5) Single Displacement (Substitution) Reaction

6) Double Displacement (Metathesis) Reaction

7) Acid-Base Neutralization Reaction

8) Precipitation Reaction

Here are the Answer:

1. Oxidation-Reduction (Redox) Reaction

2. Combustion Reaction

3. Decomposition Reaction

4. Synthesis Reaction

5. Single Displacement (Substitution) Reaction

6. Double Displacement (Metathesis) Reaction

7. Acid-Base Neutralization Reaction

8. Precipitation Reaction

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An endothermic process from the list would be the melting of ice cubes. Option A.

Endothermic processes are processes that absorb energy from the surrounding. Chemically, endothermic reactions are reactions in which the products are at higher energy level than the reactants.

Endothermic processes are different from exothermic processes. Exothermic processes are processes that gives off energy to the surrounding instead of taking from it.

In order for ice cubes to melt, they need to absorb energy from external sources. In order words, the melting of ice cubes is analogous to an endothermic process.

Burning of sugar and candle give off heat energy to the surrounding. When water vapor condenses, they also give off energy in order to change state from gas (vapor) to liquid. In other words, the burning of sugar and candle, as well as the condensation of rain from water vapor are all exothermic processes.

The only process that is endothermic is the melting of ice cubes.

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Most of the elements to the left of the stair-step line in the periodic table exist as liquids in the periodic table and the correct option is option B.

The periodic table is a tabular arrangement of the chemical elements by increasing atomic number which displays the elements so that one may see trends in their properties.

Elements are arranged from left to right and top to bottom in the order of their increasing atomic numbers. Thus,

Therefore, Most of the elements to the left of the stair-step line in the periodic table exist as liquids in the periodic table and the correct option is option B.

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Answer:

This region of thick, hot crust and mantle extends 1,300 kilometers north and south of the Iceland hotspot and some 1,000 kilometers north and south of the Azores hotspot. Together, the two hotspots appear to be feeding a huge supply of magma to nearly the entire northern segment of the Mid-Atlantic Ridge.

Explanation:

please give me a heart

Answer:

Easter island

Answer: 2.40 moles of \(CO_2\) will be formed in the reaction.

Explanation:

Given values:

Moles of \(C_2H_2\) = 1.20 moles

The given chemical equation follows:

\(2C_2H_2+5O_2\rightarrow 4CO_2+2H_2O\)

By the stoichioemetry of the reaction:

If 2 moles of \(C_2H_2\) produces 4 moles of carbon dioxide

Then, 1.20 moles of \(C_2H_2\) wil produce = \(\frac{4}{2}\times 1.20=2.40mol\) of carbon dioxide

Hence, 2.40 moles of \(CO_2\) will be formed in the reaction.

The volume of the water is obtained as 72 mL.

We know that the heat of vaporization is the heat that is required to raise convert the substance from the liquid state to the gaseous state. Now, we know that we can be able to find the energy from the use of the formula;

H = mL

H = heat that is required

m = Number of moles of the object

L = Heat of vaporization

We know from the problem that we have that;

H = 163 kJ

L = 40.66 kJ/mol

Then we would have;

Number of moles = H/L

= 163kJ/40.66 kJ/mol

=  4 moles

Mass of water = 4 moles * 18 g/mol = 72 g

Since the density of water = 1 g/mL

Volume = Density * mass

= 1 g/mL * 72 g

= 72 mL

Thus, the volume of the water that would be vaporized in the process that we have described is about a volume of 72 mL.

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Structure A represents the arrangement of atoms in pure copper because  copper is a solid and only made of one type of atom.

The chemical element copper has the atomic number 29 and the symbol Cu. Copper, a transition metal, is a solid at ambient temperature.

Pure copper has a low hardness, is exceedingly ductile, and is malleable. For electrical applications, a number of reasonably pure Cu grades are produced, with small variances in deoxidation.

Solid copper is defined as a face-centered-cubic (fcc) arrangement of copper atoms.

Thus, structure A correctly represents the arrangement of atoms in pure copper.

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The mass of the solid will be 114.7 g.

The density of a substance is given as the ratio of its mass and its volume.

Also, a solid will always displace its own volume in a liquid.

Mass of liquid solvent = 47.3 g

Density of liquid solvent = 0.865 g/mL

Recall that: density = mass/volume

Volume of liquid solvent = mass/density

                                     = 47.3/0.865

                                      = 54.7 mL

Volume of solid + liquid solvent = 90.0 mL

Volume of solid = 90.0 - volume of liquid solvent

                            = 90.0 - 54.7

                               = 35.3 mL

Density of solid = 3.25 g/mL

Mass of solid = density x volume

                       = 3.25 x 35.3

                          = 114.7 g

The mass of the solid is 114.7 g.

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Answer:

NO + O2 NO2

Explanation:

The sample response is : how do mass and the type of material affect thermal energy transfer?

So one need to have include the below factors in your answer:

The mass of an object influences allure thermal strength transfer traits. Generally, objects accompanying best public have greater warm strength depository volume.

They can absorb more heat strength before experience a meaningful change in hotness. If an equal amount of heat is used to both objects, the object accompanying better mass will demand more heat strength to raise allure temperature distinguished to the object accompanying tinier mass .

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. In this experiment, you need to examine the idea of the thermal energy transfer. Using a controlled experiment, what might a good question about the variables that affect thermal energy transfer be? Thermal energy transfer depends on many properties, be limit your question to only two. What did you include in your question?

The pressure of the gas if it were behaving ideally is P = (3.220 moles × 8.314 J/mol × K × 298 K)/(8.325 L - 3.220 moles × b) - a(3.220 moles²)/(8.325 L²).

To use the van der Waals equation to determine the pressure of a gas if it were behaving ideally, you will need to first determine the value of the a and b parameters for the gas. These values are specific to each gas and can be found in a table or by using a calculator. Once you have the values of a and b, you can use the van der Waals equation to calculate the pressure:

P = (nRT)/(V-nb) - a(n²)/(V²)

where P is the pressure, n is the number of moles of the gas, R is the ideal gas constant, T is the temperature in kelvins, V is the volume of the container, and a and b are the van der Waals parameters for the gas.

Plugging in the given values, you can calculate the pressure of the gas if it were behaving ideally:

P = (3.220 moles × 8.314 J/mol × K × 298 K)/(8.325 L - 3.220 moles × b) - a(3.220 moles²)/(8.325 L²)

Note that you will need to determine the values of a and b for the gas in order to solve for the pressure.

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Answer:

No

It's called a formula of an element which is a sodium element.

A) The chemical symbol for the ion is Fe+

B) It has 20 electrons in total, and there are 6 3p electrons in the ion.

C) There are 6 electrons present in the 3p orbital.

The atomic cation with the given electron configuration is represented by the chemical symbol Fe+.

To determine the number of electrons in the ion, we need to count the electrons present in the electron configuration. In the given configuration, we can see that the 1s orbital has 2 electrons, the 2s orbital has 2 electrons, the 2p orbital has 6 electrons, the 3s orbital has 2 electrons, the 3p orbital has 6 electrons, the 3d orbital has 1 electron, and the 4s orbital has 1 electron. Adding up these numbers, we have:

2 + 2 + 6 + 2 + 6 + 1 + 1 = 20

Therefore, the ion has 20 electrons.

To determine the number of 3p electrons in the ion, we look at the 3p orbital. In this case, there are 6 electrons present in the 3p orbital.

In summary, the chemical symbol for the ion is Fe+, it has 20 electrons in total, and there are 6 3p electrons in the ion.

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The molarity of the solution after mixing 19g of sugar in 100ml of distilled water is 5.56×10⁻⁴/ml

The molarity is characterized as the complete number of moles of solute present in a given arrangement for each liter. It is otherwise called "molar focus" and is perused as "molar." It is addressed by the letter "M," and its unit is mol/L. The molarity of an answer is supposed to be one molar in the event that one mole of the solute disintegrates in one liter of the arrangement. The molarity of an answer relies upon the volume of the arrangement yet not the volume of the dissolvable. As the volume of the arrangements changes with the adjustment of states of being of the framework, the molarity of the given arrangement relies upon the actual properties of the framework, like pressure and temperature, in contrast to mass.

We know that molarity is given by the formula

M=number of moles of solute/volume of solution in ml

Here solute is sugar.For finding the moles of solute we need to find the molecular weight of sugar which is calculated as

Sugar(C₁₂H₂₂O₁₁)=12ˣ12 + 22ˣ1 + 16ˣ11=342g

Therefore,number of moles=19/342

Now,we have volume of solution in ml=100

Therefore,molarity=(19/342) /100

=>Molarity=19/34200

=>Molarity=5.56×10⁻⁴/ml

Hence,molarity is 5.56×10⁻⁴/ml

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Light energy travels in the form of waves.

A. Cell reaction:\(2 Cd^2+(aq) + 2 Cr(s) - > 2 Cd(s) + 2 Cr^2+(aq) ; E^0cell = -0.51 V\)

B. Cell reaction: \(2 Fe^2+(aq) + Br2(g) - > 2 Fe(s) + 2 Br^-(aq) ; E^0cell = +1.507\)

Let's calculate the standard cell potential, E^0cell, for each pair of half-reactions and write the balanced equations for the overall cell reactions:

A. Half-reactions:

\(Cd^2+(aq) + 2e^- - > Cd(s) (E^0 = -0.403 V)\\Cr^2+(aq) + 2e^- - > Cr(s) (E^0 = -0.913 V)\)

To calculate the standard cell potential, we subtract the reduction potential of the anode (oxidation half-reaction) from the reduction potential of the cathode (reduction half-reaction).

\(E^0cell = E^0cathode - E^0anode\\E^0cell = (-0.913 V) - (-0.403 V) = -0.51 V\)

The balanced equation for the overall cell reaction is obtained by multiplying the half-reactions by coefficients to ensure that the number of electrons transferred is the same:

\(2 Cd^2+(aq) + 2 Cr(s) - > 2 Cd(s) + 2 Cr^2+(aq)\)

B. Half-reactions:

\(Fe^2+(aq) + 2e^- - > Fe(s) (E^0 = -0.447 V)\\Br2(g) + 2e^- - > 2 Br^-(aq) (E^0 = +1.06 V)\\E^0cell = E^0cathode - E^0anode\\E^0cell = (+1.06 V) - (-0.447 V) = +1.507\)V

The balanced equation for the overall cell reaction is:

\(2 Fe^2+(aq) + Br2(g) - > 2 Fe(s) + 2 Br^-(aq)\)

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Paper used as a writing material is made of pulp (wood).

Paper is a sheet material used for writing on or printing on (or as a non-waterproof container), usually made by draining cellulose fibres from a suspension in water.

Paper is made from cellulose found in trees, which are the main source of cellulose fibre (or woodpulp). Besides woodpulp, paper can be made from other materials such as cotton, flax, esparto, straw, hemp, manilla and jute.

Wood pulp is usually a softwood, used for pulping to make paper.

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Answer:

Most similar- oxygen

Least similar- sodium

Explanation:

The complete question is shown in the image attached.

Now let us consider all the options in the questions carefully. We do know that hydrogen forms  covalent bonds with sulphur. Two hydrogen atoms form form two polar covalent bonds with one sulphur atom. The molecule is bent owing to the presence of two lone pairs of electrons on the sulphur central atom.

Oxygen is in the same group as sulphur in the periodic table. The compound between hydrogen and sulphur is strikingly similar to the compound formed between sulphur and hydrogen due to chemical similarity of compounds of elements in the same group of the periodic table. Hence H2O bears the greatest similarity to H2S.

The bond between hydrogen and halogens is also polar covalent but less similar to the bond between sulphur and hydrogen.

Lastly, the bond between hydrogen and sodium is ionic and least similar to the bond between hydrogen and sulpur. We actually have in that compound, Na^+ H^-. Sodium transfers one electron to hydrogen as is implied in the ionic formula shown.

Hence the answer above.

The change in temperature from start to finish for the air and each of the samples would be calculated by subtracting the initial temperature from the final temperature. For example, if the initial temperature of the air was 20°C and the final temperature was 15°C, the change in temperature would be -5°C.

The water sample that lost the least amount of heat energy over the 6-minute time interval would be the one with the smallest change in temperature. In the example above, if the change in temperature for water sample 1 was -3°C and the change in temperature for water sample 2 was -4°C, water sample 1 would have lost the least amount of heat energy.

The rate of heat loss was not constant during each experiment because the slope of the lines on the graph is not constant. The slope of the line represents the rate of heat loss, and if the slope is not constant, the rate of heat loss is not constant.

The material that was the best insulator would be the one with the smallest change in temperature. In the example above, water sample 1 would be the best insulator because it had the smallest change in temperature.

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Enzymes speed up the process while being unaffected by the one they catalyze. Enzyme properties are being researched.

The vital function of enzymes is to reduce the activation energy of a reaction, or the number of calories necessary for the process to start. In order to facilitate the chemical bond-forming and bond-breaking processes, enzymes bind to reactant components and hold them in place.

As biological catalysts, enzymes quicken the pace of biological reactions. Enzymes change one energy form into a more useful one. Cofactors are elements that help enzymes function. There is a great degree of selectivity in enzymes.

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There is no reason to run these solutes at the 20 MWCO because they are both much smaller than the MWCO of the membrane.

The MWCO (molecular weight cut off) is the molecular weight of a solute at which it will be retained by a membrane during a process such as ultrafiltration or dialysis. If a solute has a molecular weight higher than the MWCO of a membrane, it will be retained and not pass through the membrane. If the molecular weight of a solute is lower than the MWCO, it will pass through the membrane.

In this case, glucose has a molecular weight of 180 g/mol (6 carbons x 12 g/mol per carbon + 6 oxygens x 16 g/mol per oxygen) and albumin has a molecular weight of approximately 81,942 g/mol (607 amino acids x 135 g/mol per amino acid). Both of these solutes have molecular weights that are much lower than 20,000 g/mol, which is a typical MWCO for ultrafiltration or dialysis membranes.

They would both easily pass through the membrane and be lost during the process. Instead, a membrane with a much lower MWCO would be needed if we wanted to retain these solutes during a process such as ultrafiltration or dialysis.

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Answer:

The compound of the formula is Sodium triphosphate.

Explanation:

Chlorine is more reactive than bromine because it replaces both bromine and iodine.

Fluorine is the most sensitive while on the other hand, the astatine is the least reactive as compared to other elements. The chlorine displaces both bromine and iodine, and bromine displaces iodine because of its high reactivity. The element that replaces other atom is considered as more reactive.

The order of reactivity is that the chlorine is more reactive than bromine, which indicates that chlorine is more reactive than iodine.

So we can conclude that chlorine is more reactive than bromine due to high reactivity.

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