name the following ketones and aldehydes. when possible, give both a common name and an iupac name.

The correct statement about emission line spectrum of the hydrogen atom is i)the lines converge at lower energies.So,correct option is i.

The hydrogen spectrum is a significant piece of proof to show the quantized electronic construction of a molecule. The hydrogen atoms of the particle separate when an electric release is gone through a vaporous hydrogen particle. It brings about the emanation of electromagnetic radiation started by the enthusiastically energized hydrogen iotas. The hydrogen discharge range involves radiation of discrete frequencies. These series of radiation are named after the researchers who found them.

Hydrogen atom lines converge at lower energies since electrons of emission lines are stable in nature when energy is lower. Every object in this universe want to remain stable, similar nature with electron also when they have less energy then they are able to converge more easily as compared to any other state.

Hence, correct option is a.

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(Complete question) is:

Which statement is correct for the emission spectrum of the hydrogen atom?

i.The lines converge at lower energies

ii.The lines are produced when electrons move from lower to higherenergy levels .

iiiThe lines in the visible region involve electron transitions into theenergy level closest to the nucleus.

ivThe line corresponding to the greatest emission of energy is in theultraviolet region.

The pressure of the gas in the bulb, given that height in the right arm is 100 mm and the left arm is 120 mm, is 740 mmHg (Option C)

From the question given above, the following data were obtained:

The pressure of the gas in the bulb can be obtained as shown below:

Pressure of gas = Atmospheric presure - Pressure due to difference in height

Pressure of gas = 760 - 20

Pressure of gas = 740 mmHg

Thus, we can conclude from the calculation made above that the pressure of the gas is 740 mmHg (Option C)

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Business travel is categorized into scope 3 emissions. In addition to exposing groups to weather transition risks, Scope 3 emissions can doubtlessly enhance prices.

Scope 3 emissions are among the finest quantity of emissions that groups produce indirectly, so it is going to be vital for manufacturers to attain their sustainability goals, with the blessings to wider society of a greener enterprise environment. These also are oblique emissions – which means the ones now no longer produced with the aid of using the organization itself – however they fluctuate from Scope 2 as they cowl the ones produced with the aid of using clients the use of the organization's merchandise or the ones produced with the aid of using providers making merchandise that the organization uses.

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The conjugate acid of CH3COO- is CH3COOH. The conjugate acid of F- is HF. The conjugate acid of CN- is HCN. The conjugate acid of PO43- is HPO4(2-).The conjugate base of CH3COOH is CH3COO-. The conjugate base of HCl is CL-. The conjugate base of H2SO4 is HSO4-. The conjugate base of H2S is HS-. The conjugate base of H3PO4 is H2PO4-. The conjugate base of NH4+ is NH3. Na2HPO4 is soluble and exists in two units of the cation Na+ and one unit of the anion Na+ AND HPO4^2-. The conjugate base of this anion is  PO4^3-. Na3PO4 is soluble and exists in three units of the cation Na+ and one unit of the anion PO4^3-. The conjugate acid of this anion is HP04^2-.

According to the Brnsted-Lowry acid-base theory, a conjugate acid is a chemical that is produced when an acid donates a proton (H +) to a base; in other words, it is a base that has had a hydrogen ion added to it, as in the opposite reaction, the base loses a hydrogen ion. A base is made when a proton from an acid is taken on, while an acid is produced when a base accepts one. An acid and a base that only differ by the presence or absence of a proton are said to be conjugate acid-base pairs.

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The Lewis diagram of the compound propanol contains 7 C-H sigma bonds and 3 C-C sigma bonds. There are only one C-O bond and one O-H bond and the oxygen contains two lone pair of electrons.

A Lewis diagram is used to represent the bonds between atoms and the shared pair of electrons, non-bonded electrons and the lone pairs as well. Thus, we can understand the number of each type of bonds and the electrons present in the valence shell which are bonded or not.

The formal charge of each atom in the compound can be easily calculated from the Lewis diagram of the compound. The presence of lone pairs, sigma bonds, covalent bonds for each atom can be clearly understood from the Lewis diagram.

The Lewis diagram of the compound propanol contains 7 C-H sigma bonds and 3 C-C sigma bonds. There are only one C-O bond and one O-H bond and the oxygen contains two lone pair of electrons.

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There are two kinds of motion that earth possess, one is rotation and other is revolution. Therefore,  the correct option is option C that is "this is due to rotation of earth on its axis".

The motion of the earth around its axis is known as rotation. Revolution refers to the motion of the earth about the sun in a fixed route or orbit. The earth's axis, which is an invisible line, forms a 6612° angle with its planet's orbit.

The earth does not remain stationary throughout the year. The Earth revolves around the sun. The earth revolves and spins around the sun. The Earth is situated between Venus and Mars, therefore it is neither too hot nor too cold. Because of rotation of earth on its axis, earth is hotter in summer than in winter.

Therefore,  the correct option is option C that is "this is due to rotation of earth on its axis".

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No, the freezing point can be either positive or negative, depending on the substance.

Substance is a term used to refer to a material or matter that possesses a certain physical property or form and can exist either as a solid, liquid, or gas. It is a fundamental concept in chemistry and physics, used to refer to any type of material that has mass and occupies space. For example, water, air, soil, and rocks are all substances. The properties of substances depend on the arrangement of their atoms and molecules and can be used to identify and distinguish different kinds of substances.

For example, the freezing point of pure water is 0°C (32°F).

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Answer:

hope this answer will help you

Explanation:

As we know that

number of moles=mass/molecular mass

so we moles and we know the molecular mass of NH3 which is 17 we simply multiply no. of moles with molecular mass to get mass in gram

0.655×17= 11.135g

32.9 times is the rate of a reaction changed if an enzyme lowers the Ea by 7.0 kj/mol at 37°C.

Using the Arrhenius equation

log (k2/k1) = [Ea (uncatalysed) - Ea (catalysed)] / 2.303x RT

where k2 = rate constatnt of catlaysed reaction

         k1 = rate constant of uncatalysed reaction

         R = gas constant = 8.314 J/mol.K

         T = absolute temperature of the reaction

            = 37 + 273 = 310 K

thus

log (k2/k1) = 9x1000J / (2.303 x 8.314x310)

               = 1.51

thus k2/k1 = 32.81

The rate at which a chemical reaction occurs is defined as proportional to the rise in product concentration per unit time and the decrease in reactant concentration per unit time. The reaction times may vary substantially.

For example, although oxidative corrosion of iron in the Earth's atmosphere might take years, cellulose burning in a fire happens in fractions of a second. Most responses slow down as the reaction develops.

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Examples of homologous structures include the human arm, a bird or bat's wing, a dog's leg, a dolphin or whale's flipper, and a bird or a bat's wing. Despite being comparable and having similar qualities, they are separate and have different functions.

The arms of primates and bats are two common examples of homologous structures in evolutionary biology. Genetically, these two structures are related even though they do not share the same function or appearance as their most recent common ancestor.

The forelimbs of vertebrates, which are similar to the arms of primates, the front flippers of fish, and the wings of bats and birds, are an example of homologous structures.

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IBr3 has three single bonds between the Iodine (I) and Bromine (Br) atoms in its Lewis structure. The Iodine atom (I) is in the centre, surrounded by three Bromine atoms (Br).

The Iodine atom has two lone pairs, while all three Bromine atoms have three. Because the overall formal charge is zero, the Lewis structure of PBr 3 described above is the most appropriate, reliable, and stable in nature. In PBr 3, there are three bonding pairs of electrons and one lone pair of electrons. The molecule will shape itself in such a way that repulsive forces are minimised.

The number of lone pairs of electrons present around the central atom is also denoted by the Lewis Structure. Ionic, covalent, and coordination compounds can all have Lewis structures. However, we can only draw it if we know the compound's molecular formula.

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Homologous structures are physical features that are similar in form or function, but which have evolved separately in different species. These structures provide evidence for the theory of evolution by common descent, which proposes that all living organisms share a common ancestor and that they have evolved over time through a process of natural selection.

Some examples of homologous structures include:

   The wings of birds, the wings of bats, and the arms of humans. These structures have different functions (flying, grasping, etc.), but they have a similar skeletal structure and are made up of bones that have a similar arrangement and shape. This suggests that they have a common evolutionary origin.

   The fins of fish and the legs of reptiles. The bones in the fins of fish and the legs of reptiles are similar in shape and arrangement, indicating that they may have evolved from a common ancestor.

   The gills of fish and the lungs of mammals. Both gills and lungs are used for respiration, but they have evolved independently in different groups of organisms. The similarities between the two structures suggest that they may have evolved from a common ancestor.

Homologous structures are one type of evidence that is used to support the theory of evolution. Other types of evidence include the fossil record, comparative anatomy, and molecular biology.

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It depends on the type of solute being dissolved, as different solutes will have different solubility rates in water.

Solubility is the ability of a substance to dissolve in a solution. It is a physical property of a compound that is affected by temperature, pressure, and the presence of other compounds. Solubility is an important factor in determining the behavior of a material when mixed with other compounds. It is also important in determining the rate of reaction of a compound with other compounds in a solution. Solubility can also be used to determine the concentration of a solution or the amount of a compound that can be dissolved in a solution.

Generally speaking, the solubility of a solute in water increases as the temperature of the water increases. For example, the solubility of sugar in water is about 180 g/L at 20°C, whereas the solubility of sodium chloride is about 35 g/L at 20°C. Therefore, the amount of solute that will dissolve in 100g of water will vary depending on the type of solute and the temperature of the water.

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The color of the beans darkens, and the bean shells become fragile. The process transforms the flavor-precursors in the bean into the compounds that give chocolate its scent and flavor.

Caffeine and theobromine are both found in coffee and chocolate. The cacao plant produces theobromine, a member of the alkaloid family of substances, along with many other plants. Coffee and tea also contain some theobromine, but chocolate is the best natural source.

There are numerous organic chemicals used to make chocolate. This means that there are three ingredients that chocolate must definitely include. These are the three elements that make up carbon, oxygen, and hydrogen.

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Answer:

Explanation:

When two hydrogen atoms come close enough to each other, their electrons are attracted to the proton of the other atom.

Answer:

0.9cm³

Explanation:

Density(D)= 5.0g/mL

gravity(g) = 10.0m/s²

mass(m) = ?

weight(w) = 45.0g

volume = ?

soln

knowing that

weight = mass × gravity

W = m × g

45 = m × 10

45 = 10m

[tex]m = \frac{45}{10} = 4.5[/tex]

m = 4.5g

[tex]density = \frac{mass}{volume} [/tex]

[tex]5 = \frac{4.5}{v} [/tex]

cross multiply

[tex]5v = 4.5[/tex]

[tex]v = \frac{4.5}{5} [/tex]

v = 0.9cm³

i hope this helps

Answer:

to produce silicon tetrachloride and water

Explanation:

α and β decay processes new elements.

The process by which unstable nuclei of radioactive atoms are becoming stable by emitting positive ions and energy is known as radioactive decay. Radioactive decay is classified into three types: alpha decay, beta decay, and gamma decay. Alpha and beta decay are processes that convert one element into another.

There seem to be three types of decays: α - decay, β – decay and γ – decay.

The nucleus loses two protons and two neutrons during alpha decay, resulting in the formation of a new element with just an atomic number that is two less than the original atomic number.

The new atomic number = the initial atomic number - 2

The neutron inside the core decays into one proton and one electron during beta decay, and the electron is emitted as a beta ray while the proton remains inside the nucleus.

As a result, it generates a new element with an atomic number that is one higher than the original atomic number.

The new atomic number = the initial atomic number + 1.

There is no change throughout charge or mass in the nucleus during gamma decay. As a result, the atomic number remains constant.

As a result, only α decay and β decay produce new elements.

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The most typical way for occupational contaminants to enter the body is through breathing contaminated air.

Intake, ingestion, injection, and the skin's absorption and eyes are the four primary entrance points.

The method via which a person may come into touch with a dangerous material is referred to as an exposure pathway.There are three primary exposure routes: direct touch, ingestion, and inhalation.

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Organic compounds that contain alike amino as well as carboxylic acid functional groups are known as amino acids.

Although thousands of amino acid residues exist in nature, the alpha-amino acids that comprise proteins are unquestionably the most important. The genetic code contains only 22 alpha amino acids.

An amino acid's structure allows it to function as both a base and an acid. Because nearly all amino acid molecules exist as zwitterions at a specific pH value (different for each amino acid), an amino acid has this ability. When acid is added to a zwitterion-containing solution, the carboxylate group manages to capture a hydrogen (H+) ion, causing the amino acid to become positively charged.

When a base is added, the ion removal of the H+ ion from the zwitterion's amino group results in a negatively charged amino acid. In both cases, the amino acid serves to maintain the pH of the system by removing the added acid (H+) or base (OH) from solution.

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All intermolecular forces include electrostatic attraction in some way.

Electrostatic interactions are the source of intermolecular forces; this means that they are created when positively and negatively charged species come into contact with one another. Intermolecular interactions, much like covalent and ionic bonds, are the result of the addition of components that are both attractive and repulsive. The electromagnetic forces of attraction or repulsion that act between atoms and other types of neighboring particles, such as atoms or ions, are examples of intermolecular forces, also known as secondary forces. An intermolecular force, also known as an IMF (or secondary force), is the force that mediates the interaction between molecules.

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The given organic compound can be named based on the IUPAC rules. The name of the compound is 3-hydroxy-2,4,4-trimethyl pentane.

IUPAC rules are certain rules regarding the naming of organic compounds. The compounds are numbered based on the longest chain of carbon atoms in it. The numbering starts from the position of double bond or triple bond if present or the functional groups is noted.

The name is given in the alphabetical order of the prefix of the functional groups and the numbering is put in a manner that the carbons bearing the functional groups have the small numbers.

The given compound contains 5 carbons in the longest chain. The OH group is attached to the 3rd carbon and there are 3 methyl branches one in 2nd carbon and 2 in 4th one. Hence, the name of the compound is 3-hydroxy-2,4,4-trimethyl pentane.

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The IUPAC name of the given organic compound is E -3-methyl-4-ethyl-hept-3-en. The notation E is given because, the similar groups are in opposite directions.

For naming organic compounds, there are certain rules  called the IUPAC rules regarding the numbering of carbon atoms and naming of adding functional groups to the names.

In the given compound, the double bond is at the  third carbon in the long chain and the methyl branch is on 3rd carbon and ethyl branch  on the fourth carbon. The long chain contains total 7 carbon atoms.

The bulk groups and methyl groups are in the similar side  and hence, notation E is used. The name of the compound is ,  E -3-methyl-4-ethyl-hept-3-en.

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Sanitizers typically operate at temperatures from 75°F and 120°F.Chlorine compounds can corrode some metal objects at higher temperatures.

Temperatures, pH, relative humidity, & water hardness are other physical and chemical variables that affect disinfection processes.

Solutions containing chlorine for sanitizing must have a lowest temperature of 75°F.At lower temperatures, they perform worse.Chlorine can evaporate from of the solution and damage some metals at temperatures higher that 120°F.Generally speaking, all sanitizers function best between 75° & 120°F.

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The electron configuration of a potassium atom at ground state is 1s²2s²2p⁶3s²3p⁶4s¹. Therefore, option D is correct.

The electron configuration of an element can be explained as electrons being occupied in different energy levels of an atom of a specific element. In the electron configuration, the electrons are usually written as a superscript of atomic subshells. For example, the electron configuration of Helium can be represented as 1s²2s².

The sequence of completely filled subshells similar to neighboring the electronic configuration of a noble gas is represented by square brackets. The principal quantum number (n) will be used to denote the maximum number of electrons in an electron shell.

The total number of electrons occupied in the given electronic configuration  1s²2s²2p⁶3s²3p⁶4s¹  is 19. The atomic number of potassium is 19 therefore it is the configuration of potassium.

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An element with three valence electrons has an effective nuclear charge of 2.

Eight elements make up the third period: silicon, phosphorus, magnesium, aluminum, silicon, sulfur, chlorine, and argon. The first two, sodium and magnesium, are found in the periodic table's s-block, while the remaining elements are found in the p-block.

The third period elements are also known as typical elements or representative elements since they accurately reflect the characteristics of their own group without any aberrations. Eight elements make up the third period, including sodium, magnesium, aluminum, silicon, phosphorus, sulfur, chlorine, and argon.

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the lattice energy of MgH2() is 2791 kJ/mol with a series of step when the Enthalpies of formation for calcium hydrided is given.

An article publishing charge (APC) is required of authors or research funders to cover publication costs in open access journals that do not charge subscription fees. This guarantees that everyone will be able to access your article promptly and without charge in the future.

Solution:

the lattice energy of MgH2() is :

ΔHf(−75. 3 kJ/mol )  =S+0.5D+IE+EA+U

ΔHf(−75. 3 kJ/mol )= 2791 kJ/mol

The papers published in MDPI Special Issues are of extremely high quality! When I published my research with MDPI (Energies Journal), it was a wonderful experience. Both the submission of the manuscript and the timing of publishing were excellent.

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After solving the equation the final volume of gas is 338.50ml.

What is Avogadro's law?

It states that, when the temperature and pressure are held constant, the volume of a gas is directly proportional to the number of moles of a gas.

⇒ V α n

In this problem ,

Initial volume , V₁ = 240ml

Initial number of moles = 0.519 mol

final number of moles = 0.519 + 0.213

                                    =  0.732 mol

By Avogadro's law

V₁/n₁ = V₂/n₂

V₂ = V₁ × n₂ / n₁

   = 240×( 0.732 / 0.519)

   = 338.50ml

Therefore final volume of gas is  338.50ml

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The volume that 4.95 moles of hydrogen gas will occupy at STP is 110.95L.

The volume occupied by a gas can be calculated using the ideal gas equation as follows:

PV = nRT

Where;

According to this question, a gas at standard temperature and pressure will have the following characteristics:

1 × V = 4.95 × 0.0821 × 273

V = 110.95L

Therefore, 110.95L is the volume occupied by the ideal gas.

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