Ethers can be cleaved using ______.A. NaOH or KOH B. H2SO4 or HCl C. HI or HBr D. HNO3 or H2SO4

Ammonium sulphide ((NH4)3S) contains roughly 20.55% nitrogen by mass.

Two nitrogen (N) atoms, eight hydrogen (H) atoms, one sulphur (S) atom, and four oxygen (O) atoms are all present in one molecule of ammonium sulphate (NH4)2SO4. There are therefore 15 atoms in total. We are aware that the relative atomic masses of each element present in a compound can be added to determine its molar mass.

N: 1 x 14.007 g/mol equals 14.007 g/mol

The molar mass of ammonium sulphide in its entirety is:

(1 x 14.007 g/mol) + (3 x 1.008 g/mol) + (1 x 32.06 g/mol) = 68.153 g/mol

We can use the following formula to determine the nitrogen proportion by mass:

% N = (mass of N / total mass of compound) x 100%

Plugging in the values, we get:

% N = (14.007 g/mol / 68.153 g/mol) x 100% ≈ 20.55%

As a result, there is around 20.55% of nitrogen by mass in ammonium sulphide ((NH4)3S).

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Answer: Molecules are not attracted

Explanation:

Answer:

The bonds must be non-polar.

Explanation:

The water molecules are polar, so they wouldn't be attracted to the surface. This means the water would bead up and curve away from the surface it landed on.

When water beads up, this happens because the water molecules are more strongly attracted to each other by the polar bonds than they are to the surface by non-polar interactions.

To summarize:

On a nonpolar layer, water beads up because the attraction to each other is stronger than the surface.

Hope this explained it well.

Answer: A) calcite

Explanation:

Hardness can be defined as the ability of the mineral to resist the scratch. It is the property to judge the hardness of the mineral. Mineralogist study this property of hardness using Mohs hardness scale.

Talc is the least hard substance after that gypsum, then calcite, fluorite, and then apatite.

The gypsum can be scratched by the calcite but the calcite cannot scratch apatite as it is softer than apatite.

To calculate the specific heat of silver, you will need to use the formula:

So for this example, we can calculate the specific heat of silver as follows:

Therefore, the specific heat of silver is 0.523 J/g°C.

The specific heat of silver is a measure of the amount of energy required to increase the temperature of one gram of silver by one degree Celsius. This value is important in understanding how different materials respond to temperature changes and can be used in many areas of science and engineering.

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Answer:

Na (s) + Cl2 (g) → NaCl (s)

The evidence of the giant impact theory suggests that Earth and the moon may have once been in the same place is the type of gases in the atmospheres of Earth and the moon is the same. The correct option is A.

The giant impact theory is the theory that talks about the formation of the moon from the earth, It says that when something big explodes with the old earth, the moon was created. The theory is also called the Big Splash theory.

According to the theory, the gases on the moon and the earth will be the same. Like other planets, the earth is also made up of gases. It also happens for collisions between proto - earth and Mars-sized.

Thus, the correct option is A. The type of gases in the atmospheres of Earth and the moon is the same.

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Answer:

d) atmosphere pressure

Answer:

B.) weather

Explanation:

weather is constantly changing everyday and each day presents a new condition:)

Answer:

If you increase temperature, you increase entropy. (1) More energy put into a system excites the molecules and the amount of random activity. (2) As a gas expands in a system, entropy increases.

A well-defined group of atoms or objects is known as system. A nucleus and one or more electrons attached to the nucleus make up every atom.

The fundamental unit of chemistry is the atom. It is the smallest particle that can be divided into matter without releasing electrically charged particles. Additionally, it is the atom smallest piece of matter with the characteristics of a chemical element.

A system is made up of a number of interconnected or interacting components that follow a set of rules to function as a single cohesive unit. A system's boundaries, structure, and purpose all influenced and surrounded by its environment are expressed in how it functions. A system is an arrangement of parts or elements that serve the same function.

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Answer: Copper

Explanation: A material's ability to form thin sheets under pressure by hammering or rolling is called Malleability.Metallic bond is a term used to describe the collective sharing of a sea of valence electrons between several positively charged metal ions.Metallic bonding is a type of chemical bonding that arises from the electrostatic attractive force between conduction electrons (in the form of an electron cloud of delocalized electrons) and positively charged metal ions.A strong metallic bond will be the result of more delocalized electrons, which causes the effective nuclear charge on electrons on the cation to increase, in effect making the size of the cation smaller. Metallic bonds are strong and require a great deal of energy to break, and therefore metals have high melting and boiling points

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If the density of nickel is 8.9 g/cm3, it occupies 0.15 cubic decimeters in 1335 grams of nickel.

Density is defined as the mass of a unit volume of a material substance, the space occupied by the unit mass of a material. It is the degree of compactness measured by the quantity of mass per unit  volume.

density = mass/ volume

volume = mass/ density

here the given mass is = 1335 grams

and the density given is = 8.9

=1335/8.9

=150

therefore volume calculated is 150 cubic centimeter

1 cubic centimeter is equal to 0.001 cubic decimeter

150 cubic centimeter is equal to 0.15 cubic decimeter

If the density of nickel is 8.9 g/cm3, it occupies 0.15 cubic decimeters in 1335 grams of nickel.

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Physical weathering and chemical weathering are two types of weathering that occur in nature. Physical weathering is the breakdown of rocks and minerals into smaller pieces without changing their chemical composition. In contrast, chemical weathering involves chemical reactions that change the chemical composition of rocks and minerals.

Physical weathering can occur through a variety of natural processes such as freezing and thawing, heating and cooling, and the action of wind and water.

Chemical weathering can occur through processes such as oxidation, hydration, and carbonation.

The weathering products resulting from physical and chemical weathering can have different chemical compositions due to the difference in the processes involved.

Physical weathering products have the same chemical composition as the original rock, while chemical weathering products have a different chemical composition.

Chemical weathering products can include new minerals formed by the chemical reactions, while physical weathering products are just smaller pieces of the original rock.

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The metal is (b) less active than aluminum but more active than tin

The metal strip has a greater activity than aluminum but a lower activity than tin. This is due to the fact that the metal strip developed a tin coating after being submerged in a tin (II) nitrate solution, which shows that tin ions in the solution were reduced and deposited onto the metal surface. The metal strip may be more reactive than tin, according to this.

However, there was no discernible reaction when the metal strip was submerged in an aluminum sulfate solution. This suggests that the metal strip is less reactive than aluminum because aluminum ions in the solution were not reduced or deposited onto it.

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So,

We want to draw a graph of the melting and boiling points of the elements of the periodic table against the atomic number of each of them.

For this, remember that the metals have properties that makes them have a greater melting and boiling points.

Let me upload the graph here below:

As you can see, the melting temperature of the first six atomic numbers is increasing until we finish in 7. It depends of the characteristic of the element.

If you look at your periodic table, the graph will be something like I posted above.

Answer:

A

Explanation:1

Answer:

a gas dissolved in a solid

Explanation:

The ice that comprise of small amount of dissolved air represent the type of soluton that have a solid dissolved in a gas.

Gas could be considered as the one of the four fundamental states of matter.

A pure gas should be made of individual atoms, elemental molecules that consist from one type of atom, or compound molecules that consist of a variety of atoms.

A gas mixture could be in the form of air that comprise a variety of pure gases.

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The order of elution for the given amino acids from a cation exchange column at neutral pH is: Leu, Glu, Arg.

The elution order of amino acids from a cation exchange column depends on the net charge of the amino acid at the pH of the elution buffer. At neutral pH, the carboxyl group (-COOH) of amino acids is not fully ionized, while the amino group (-NH3+) is fully ionized, resulting in a net positive charge for the amino acid.

Among the given amino acids, leucine (Leu) is a nonpolar amino acid and does not have any ionizable side chains. Therefore, it does not have any net charge at neutral pH and will not bind to the cation exchange column. It will pass through the column and elute first.

Arginine (Arg) is a basic amino acid with a positively charged guanidinium group (-NH=C(NH2)2) in its side chain. At neutral pH, the guanidinium group is fully ionized, resulting in a net positive charge. Therefore, Arg will bind to the cation exchange column through ionic interactions and will elute last.

Glutamate (Glu) is an acidic amino acid with a negatively charged carboxyl group (-COO-) in its side chain. At neutral pH, the carboxyl group is only partially ionized, resulting in a net negative charge. Therefore, Glu will have a weaker interaction with the cation exchange column compared to Arg and will elute in between Leu and Arg.

Therefore, the order of elution for the given amino acids from a cation exchange column at neutral pH is: Leu, Glu, Arg.

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Answer:

H₂CO₃

Explanation:

Water + Carbon di oxide

H20+ CO2

= H2CO3

Answer:  \(2Mg+O_2\rightarrow 2MgO\)

Explanation:

Skeletal equations are defined as the equations in which formula are used to indicate the chemicals that are involved in a chemical reaction.

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.

Thus the balanced chemical equation will be :

\(2Mg+O_2\rightarrow 2MgO\)

Includes and excludes notes are important components of the ICD-10-CM coding guidelines and can be found throughout the coding manual, including both the tabular and alphabetic index sections. These notes provide additional information and guidance for code selection and help ensure accurate and specific coding.

Includes notes provide a list of terms or conditions that are considered part of the code's definition. They indicate that if the condition or term mentioned in the includes note is present, it should be coded along with the main code.

Excludes notes, on the other hand, provide guidance on conditions or terms that are not included in the code's definition. They indicate that if the excluded condition or term is present, it should not be coded together with the main code.

Both includes and excludes notes help to clarify the appropriate use of codes and promote accurate coding practices.

It's important for coders to carefully review and understand the includes and excludes notes in both the tabular and alphabetic index sections of the ICD-10-CM to ensure accurate code assignment.

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Answer:

a

Explanation:

A molecular ingredient that could be used in a wall-filling material is C₂₇H₃₆N₂O₁₀, is not a good thermal insulator, hence option A is correct.

The big molecule C₂₇H₃₆N₂O₁₀ is a poor thermal insulator. Since NeNa is a relatively reactive chemical, it would probably dissolve in water far too quickly. The acidic molecule HCl would dissolve far too quickly in water.

Not a good thermal insulator is C₂₇H₃₆N₂O₁₀. It is a big molecule composed of a lot of hydrogen atoms. Since hydrogen atoms are excellent heat conductors, they would be ineffective in stopping heat from passing through a material used to fill a wall.

Thus, the option (A) C₂₇H₃₆N₂O₁₀ is correct.

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The provided table is arranged on the basis of newlands octave table.

This law provides a foundation for grouping together items that share comparable features. The law gave you a lot of latitude to arrange all of the elements you know into a table. The atomic weight served as the foundation for Newland's law of octaves, which connects the attributes of the elements to their atomic masses.

Only up to calcium could Newland arrange all 56 of the known elements. After calcium, no other element displayed characteristics resembling those of the first. At the time of Newlands, just 56 elements were known; however, a number of new elements have since been found.

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Answer:

It lies in in the visible region.

Frequency: is 7.407 × 10^-14 Hz

\({ \bf{V = f \lambda}} \\ { \tt{3.0 \times {10}^{8} = f \times (405 \times {10}^{ - 9}) }} \\ { \tt{f = 7.407 \times {10}^{14} \: hertz}}\)

Explanation:

V is speed of light.

f is frequency

lambda is the wavelength

Decreased amount of product: When some of the product is spilled, the total amount of product available for weighing is reduced. This means that the measured yield will be lower than the expected yield.

Inaccurate measurement: The spilled product cannot be accurately included in the final yield measurement. This introduces an error in the measurement, as the spilled product cannot be accounted for.

Lower actual yield: As a result of the decreased amount of product and the inaccurate measurement, the actual yield will be lower than the expected yield. The actual yield represents the amount of product obtained after considering any losses, such as spillage or waste.

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654 grams of Zn metal will completely react with 730 grams of HCl

The balanced chemical equation for this reaction is:
Zn + 2HCl → ZnCl2 + H2

From the equation, we can see that for every 1 mole of Zn, 2 moles of HCl are required for a complete reaction. This means the mole ratio of Zn to HCl is 1:2.

To determine the number of moles of HCl used, we need to convert the given mass of HCl to moles. The molar mass of HCl is 36.5 g/mol, so:

730 g HCl x (1 mol HCl/36.5 g HCl) = 20 moles HCl

Using the mole ratio from the balanced equation, we can determine the number of moles of Zn required:

20 moles HCl x (1 mol Zn/2 mol HCl) = 10 moles Zn

Finally, we can convert the number of moles of Zn to grams using its molar mass of 65.4 g/mol:

10 moles Zn x (65.4 g Zn/mol) = 654 grams of Zn

Therefore, 654 grams of Zn metal will completely react with 730 grams of HCl to produce ZnCl2 and H2.

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Chemical substances known as oxygenates have oxygen as one of their constituent parts. Tech B is correct

Although technically any substance containing oxygen qualifies as an oxygenate, the term is most frequently used to refer to substances added to internal combustion engine vehicles.

Oxygenate fuel additives are either alcohols, like ethanol, or ethers, with methyl tertiary butyl ether, or MTBE, being the most often used. Any chemical compound that has at least one hydroxyl group, which is made up of oxygen and hydrogen and is connected to the carbon atom in an alkyl group, is referred to as alcohol. Alkyl groups are made up of hydrogen and carbon atom chains.

Alcohols are a crucial group in organic chemistry despite their lack of chemical specificity because of how many different compounds they can originate from and be transformed into.

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Answer:

In a physical change the appearance or form of the matter changes but the kind of matter in the substance does not. However in a chemical change, the kind of matter changes and at least one new substance with new properties is formed. The distinction between physical and chemical change is not clear cut.

Explanation:

The two different crystal structures of titanium dioxide is anatase and rutile phases in thin film.

A crystal's internal repeating arrangement of atoms (or molecules or ions) is known as its crystal structure. Structure does not refer to how the crystal appears on the outside, but rather to how the particles are arranged within. These, however, are not entirely independent because a crystal's external appearance is frequently related to its internal arrangement. For instance, the cubic rock salt (NaCl) crystals have a cubic look on a physical level. Simple inorganic salts only have a few potential crystal structures that are of interest; these will be covered in depth, but it's crucial to comprehend the terminology used in crystallography.

The Bravais lattice serves as the fundamental building component for all crystals. The idea was first conceived as a topological problem: how many alternative arrangements of points in space could there be where each would have the same "atmosphere". In other words, every point would be surrounded by the same collection of points as every other point, making all of the points indistinguishable from one another.

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The statement "Most hardness tests involve pressing a hard object into the surface of a test specimen and measuring the resulting indentation or its effect" is true because the majority of the hardness tests depend on measuring the resulting indentation or the effect of the hard object on the test specimen.

Hardness testing is a method of measuring how well a material can resist permanent indentation or scratch by another material. This method is used to evaluate the toughness of materials like metals, plastics, ceramics, and polymers.

A variety of methods is available for testing hardness, which is divided into two types based on the method of testing; Dynamic Hardness Testing and Static Hardness Testing..

The sample of Dynamic Hardness Testing is exposed to a sudden load and the indentations left are analyzed. In Static Hardness Testing, an object is applied to the sample and the pressure required to deform the material is measured.

The Rockwell test, the Brinell test, the Vickers test, and the Knoop test are the most widely used hardness tests. The Brinell hardness test, which is based on the principle of measuring the diameter of the impression left on the specimen when an object is pressed into it, is the most common method of testing industrial materials.

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