which process requires more energy, melting 380 g of ice or vaporizing 43.0 g of water? the heat of fusion of water is 79.7 cal/g and the heat of vaporization is 540 cal/g. vaporizing 43.0 g of water. melting 380 g of ice.

since you  have  Sulphur dioxide in the experiment    . Use Charles' Law,  to know the volume [tex]V 1 /T 1 = V 2/ T 2[/tex]

what is the volume of the gas ?

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The structure the arrow is pointing to is the nucleus and it helps store genetic material (DNA) in living cells.

Organelle is a specialized structure found inside cells that carries out a specific life process. examples are ribosomes, vacuoles, nucleus etc.

The nucleus is the large membrane-enclosed organelle found in eukaryotic cells which contains genetic material.

The nucleus is located at the center of living cells and it functions to store genetic material called DNA. The DNA is transferred to offsprings for inheritance of traits.

According to this question, a microscopic image of a cell is shown. The arrow pointed to the nucleus of the cell.

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The mass of nitric oxide produced by the reaction of 2.81 grams of ammonia is 1.59 grams.

The equation for the reaction of ammonia and oxygen to produce Nitric oxide and water is,

4NH₃ + 5O₂ → 4NO + 6H₂O

From the reaction we can see,

4 moles of ammonia = 4 moles of nitrix oxide.

Mole of ammonia = moles of nitric oxide.

Moles = reacted/formed mass/ molar mass

Molar mass of ammonia = 17 g/mol.

Molar mass of nitric oxide = 30 g/mol.

Mass of ammonia reacted = 2.81 grams.

Putting values,

2.81 x 17 = Formed mass of nitric oxide x 30

Formed mass of nitric oxide  = 1.59grams.

The mass of nitric oxide formed is 1.59 grams.

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The molar mass of this gas is  59.0 g/mol.

Molar mass is described as the mass in grams of 1 mole of a substance. The gadgets of molar mass are grams in keeping with mole, abbreviated as g/mol. The mass of an unmarried isotope of any given detail (the isotopic atomic mass) is a cost concerning the mass of that isotope to the mass of the isotope carbon-12.

Calculation:-

PV = nRT

P = 742 torr = 0.976 atm

P × molar mass = density × R × T

0.976 * molar mass = 2.34* 0.0821*300

0.976  * molar mass = 57.6

molar mass = 59.0 g/mol

Therefore, the molar mass = 59.0 g/mol

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The three major flaws addressed by Moran's periodic spiral are:

1) Since hydrogen possesses distinct attributes that set it apart from every other element in the table, it effectively does not belong to any of the table's 18 columns.

2) The lanthanides and actinides, which are the elements from each period of the f block, have comparable properties but are not shown in columns in the table.

3) The column-and-row layout of the  periodic table hides the continuity between the pieces, which is better represented by an a spiral.

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Ammonium nitrate , NH₄NO₃ dissolves spontaneously and endothermically in water because the temperature of solution decreases.  

When we add ammonium nitrate ,  NH₄NO₃ to water at 298 K , it dissolves spontaneously and the temperature of system decreases. this means the heat is absorbed by the system and when the heat is absorbed by the system the process is called as endothermic.  the ammonium nitrate when dissolve in water it will dissociates in to ions which requires the energy so heat is absorbed. this process in endothermic.

Thus, Ammonium nitrate , NH₄NO₃ dissolves spontaneously and endothermically in water because the temperature of solution decreases.

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The order of the elements from smallest to largest atomic radius are O<C<Sn<Sr.

Atomic radius is the separation between an atom's outer electron shell and nucleus. 1/2 the distance between identical atoms that are bound together by their nuclei. Positively charged ions known as cations are smaller than their neutral atom.

Therefore, The distance between the center of the nucleus and the biggest shell inhabited by the valence electron of a neutral element is known as the atomic radius, which is an attribute of atoms. This would rely on the atom's atomic number and the quantity of electrons it contains.

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The element could be X is phosporus .

What is element?

An element is the fundamental item that can't be easily broken onto smaller of pieces. In chemistry and physics, an elementary is a substance that can't be broken down by non-nuclear reactions. In computing and the  mathematics, an element is the  distinct piece of a larger system or set.

Sol-An ionic compound is formed by the ions, which their charges replaced, so the compound Na₂X is formed by the ions Na⁺ and X⁻². Thus, X must gain two electrons to be stable at the octet, so it has 6 valence electrons. Because it can accommodate up to 12 electrons, the elememts expands the octet, do it must be in the 3rd period or higher.

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The standard Gibbs free energy of formation of is zero are option (b) K(s) and (c) Cl₂(g).

Gibbs free energy may be more than zero, much less than zero, and identical to zero. If Gibbs free energy is more than zero the response is a nonspontaneous reaction. If Gibbs free energy is less than zero the reaction is a spontaneous reaction.

The usual Gibbs free energy of formation of a compound is the exchange of Gibbs unfastened energy that accompanies the formation of 1 mole of that substance from its issue elements, of their well known states.

Gibbs free energy, G is a price that defines how spontaneous a response is, with a poor fee which means the reaction is spontaneous, and a advantageous cost that means the reaction is nonspontaneous. This fee is the combination of enthalpy and entropy.

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Helium moves more quickly on average than argon.

How much thermal energy does helium have compared to argon?

Helium has a lower thermal energy than argon does.

Explanation:

Due to the smaller mass of helium atoms in comparison to argon atoms, their average speed is higher under the given conditions. An atom's average speed is inversely related to its mass. While the average speed of an atom reduces as the mass of the atom grows, the opposite is true if the mass of the atom decreases.

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5.83ml of NaOH is needed to prepare 175 ml of 0.20 m by dilution.

Dilution is the process of “lowering the concentration of a solute in a solution by simply adding more solvent to the solution, such as water.” Diluting a solution enables adding more solvent without adding more solute.

into formula to find out the volume is ;

[tex]V_{1}[/tex][tex]N_{1}[/tex] = [tex]V_{2}N_{2}[/tex]

where [tex]V_{1}[/tex]= ?

[tex]V_{2}[/tex] = 175ml

[tex]N_{1}[/tex] = 6

[tex]N_{2}[/tex] = 0.2

So, ⇒ [tex]V_{1}[/tex]×6 = 175×0.2

[tex]V_{1}[/tex] = 5.83 ml

So, 5.83ml of NaOH is needed to prepare 175 ml of 0.20 m by dilution.

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Based on the densities and percent mass of copper and tin, the density of Bronze is 8.76 g/cm³.

Density is the ratio of the mass and volume of a substance.

For a mixture, the density of the mixture is the weighted average of the densities of the substance in the mixture.

The density of the bronze is calculated as follows;

The density of copper = 8.96 g/cm³

Percent mass of copper = 88%

The density of tin = 7.3 g/cm³

Percent mass of tin = 12%

The density of Bronze = 88% * 8.96 + 12% * 7.3

The density of Bronze = 8.76 g/cm³

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The answers that are true in regards to the scenario above is:

So, the first and second options are correct. The third and last option is incorrect.

A community is described as a social unit with commonality such as place, norms, religion, values, customs, or identity.

From the scenario above, we can conclude the following:

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A physical change does indeed involve a change in composition. Hence,t the given statement is true.

A physical change is one in which the form of the matter is altered but this does not mean it transforms into another. By composition, we refer to the size and the shape of the matter which is altered after a physical change occurs.

A physical change is reversible. This means that even though the shape and size of the matter change completely, it can always be reverted back to how it was by applying all the conditions that were present there before.

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A student observed a sperm cell using a microscope at magnification of x400 and sperm cell image measured 22 mm long then the actual size is = 55 μm.

A simple microscope produces an image of the object upon which the microscope is focused whereas magnification is the ability to make small objects seem larger such as making a microscopic organism also visible. Ability to distinguish two objects from each other is called as resolution

As we know that, 1 mm = 1000 μm.

So, 22mm = 22000 μm

Magnification of x400 given

We can calculate, Actual size = image size / magnification.

 = 22000/400

Actual size = 55 μm

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Extrapolation method for determining the titration end point is more accurate than finding the minimum conductivity because there is no human error when calculating as there could be with doing the actual experiment

Extrapolation is the estimating an unknown value based on extending a known sequence of values and to extrapolate is the infer something not explicitly stated from existing information and the point at which the indicator changes color is called as endpoint and so the addition of an indicator to the analyte solution help us to visually spot the equivalence point in an acid base titration and the endpoint refer to the point at which the indicator changes color in and acid base titration

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When energy depleted elements associated with a proton are accepted by an organic molecule the process is called Fermentation.

Fermentation is a metabolic process that causes a chemical change inside body by the actions of enzymes.

The main purpose of fermentation is to generate NAD+ and 32 ATP in the presence of oxygen.

Fermentation allows cells to survive without using ATP.

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Answer:

C it generally decrease

Explanation:

Atomic radius of an element decrease from left to right of the periodic table

The pressure of the flask under these final conditions is 13 atm .

What are moles ?

The current SI definition of moles and the "new SI" draft definition will be reviewed. Current textbook treatments of moles are compared to these official definitions. From a historical perspective, in 1971 he reviews the treatment of moles and material quantities in textbooks before and after the introduction of these quantities in SI. Textbook definitions do not always match official definitions, but reflect common usage by chemists. This is because when the new SI is adopted, the textbook definition will likely be closer to the official definition, and the draft definition more closely matches what is found in many textbooks than the current official definition. However, SI-based quantities of substances are likely to continue to cause problems for chemistry teachers and, if retained, are largely ignored by chemistry practitioners.

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This is due to the methyl-requiring acid produced.

Methyl red test is considered positive when the culture medium turns red after the addition of methyl red, because of a pH at or below 4.4 from the fermentation of glucose.

methyl red test is considered negative when the culture medium gives yellow colour after the addition of methyl red.

when the bacteria are grown in a broth medium containing glucose .if the bacteria has the ability to utilise glucose with the production of a stable acid,

the colour of methyl red changes from yellow to red when added to broth culture.

In glucose carbohydrate broth 4 mol of acids,1 mole of ethanol, and 1 mol of CO2 are produced. the large quantity of acid produced causes a significant decrease in pH which gives red colour as a result.

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The colors of the starting solutions differ in case of high and low concentrations, because the titrations start at different pH values.

The colors of the starting solutions vary in case of high and coffee concentrations, due to the fact the titrations start at distinctive pH values. In case of excessive concentrations, the starting color is of brilliant pink red, converting to purple orange all through innovative titration.

The signs have a chemical structure which can soak up mild beneath positive pH conditions and both change shade or grow to be colorless below other pH situations. This normally happens because of a exchange in protonation of the purposeful group of the molecule.

Whether an answer is acidic or simple can be measured at the pH scale. When everyday indicator is brought to a solution, the color change can indicate the approximate pH of the solution. Acids purpose universal indicator option to trade from green in the direction of crimson.

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Answer: nowhere from trees

Explanation:

Answer:

Let us know formula and denotion for Lithium oxide is Li2O.

Explanation:

While on the basis of Electronic configuration:

Lewis structure(for Lithium atom)-Li•

For Oxygen atom- it is 6 dots in the Word O(for Oxygen) but is needed to paired in a pair(of two dots if possible) by the use of either all sides where two dots are presented two sides While one dot is represented on other two sides.

When we come across we might have a simple question how and why the Lithium oxide is Li2O

So,as we know Li(have one electron in its outermost shell),written as Li^+/+1 While Oxygen requires 2 more electrons to stabilize its valency,so it written as O^-2/2-

On combining,Li^+ & O^-2

Exchange and crossing up of valency is done forming Li2O.

Do check the image uploaded for better clarity and understanding.

Daily compounding beats monthly compounding. The shorter the compounding period, the higher your effective yield is going to be.

When interest from the previous day is added, the interest earned each day on your savings account balance is known as daily compound interest. Any frequency plan, ranging from daily to yearly, can be used to compound interest. Interest is accrued daily and paid out monthly on all bank accounts from Marcus by Goldman Sachs. The formula for calculating monthly compounding is the principle amount multiplied by one plus the interest rate divided by a number of periods, which is raised to the power of the number of periods. Lenders frequently prefer to present interest rates compounded monthly instead of annually. The interest amount is obtained by deducting that sum from the principal amount.

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The correct responses that describe the various rules in the filling of orbitals are;

1) Aufbau principle

2) Pauli exclusion principle

3)  Hund's rule.

The orbital has to do with the region in space where there is a high probability of finding the electron. We have to know that that looking at the orbitals, we can know how electrons are arranged in the atoms in order of increasing energy.

The Aufbau principle shows us that when we try to fill the electrons into orbitals, we must start from the orbital that has the lowest energy. The Pauli exclusion principle states that no two electrons in an atom can have the same value for all the four quantum numbers. In other words, electrons in the same orbital must have anti parallel spins.

Also, when we are filling electrons into orbitals that have the same energy, we fill them in singly first. This is the statement of the Hund's rule.

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Answer:B

Explanation: according  to the law of electrostatics it states that  "unlike charge attract each other and like charges repel each other ".

Common characteristic of the electronic configuration of neon and argon have is their complete outer shell.

Neon  (10)  - 1s2, 2s2, 2p6

Argon (20) - 1s2, 2s2, 2p6, 3s2, 3p6

as we can see both the configurations have an complete outer shell means their octet is complete. This is the common characteristic of both the elements.

The both of them lie in group 8A that is the noble gases or inert gas.

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2so3  is the initial pressure that is seen to be used for the chemical reactions with flask 900k

what is pressure in a chemical reaction?

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