Seeds are a derived character of the spermatophytes. All of the plants in this clade reproduce using seeds. However, embryo formation is also a trait of the spermatophytes. Do you think true water-conducting tissue is a derived character of either embryophytes or green algae? why or why not?.

The first radioiodine isotopes to be used to treat thyrotoxicosis were iodine-130 and iodine-131 in 1941, and thyroid cancer was added to their list of uses in 1943.

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Answer:

iamprogrbow (check explanation)

Explanation:

Kilograms

Meters

Liters

Moles

SI Units

Scientific Notation.

Expanded Form

Metric Prefixes

Significant Figures

Magnetic

Conductive

Flammability

Reactive

Solubility

Mass

Physical Changes

Chemical Changes

States of Matter

Solid

Isotope

Isotope Symbol

Isotope Name

Charge

Octet Rule

Chemistry

Matter

Vocabulary Words (120 Total)

Particle Diagrams

Physical Properties

Chemical Properties

Intensive Properties

Extensive Properties.

Color

Luster

Length

Volume

Density

Radioactive

Toxic

Ductile

Malleable

Brittle

Metallic Bonding

Liquid

Average Atomic Mass

Ions

Shared Electrons

Transferred Electrons

Triple Bond

Gas

Phase Change

Melting

Freezing

Vaporization

Condensation

Sublimation

Deposition

Pure Substance

Mixture

Element

Compound

Homogeneous

Heterogeneous

Periodic Table

Demitri Mendeleev

Henry Moseley

Group

Period

Atom

Periodic Trends

Atomic Radius

Ionization Energy

Double Bond

MetalM

Nonmetal

Metalloids

Alkali Metals

Alkaline Earth Metals

Transition Metals

Halogens

Noble Gases

Lanthanides

Actinides

John Dalton

JJ Thomson

Ernest Rutherford

Niels Bohr

Subatomic Particles

Proton

Neutron

Electron

Nucleus

Energy Level

Emission Spectrum

Quantum Model

Metallic Bonding

Single Bond

Atomic Number

Atomic Mass

Valence Electrons

Lewis Dot Diagrams

Lewis Dot Structure

Ionic Bonding

Covalent Bonding

Sublevels

Orbitals

Orbital Diagram

Electron Configuration.

Aufbau Principle

Pauli Exclusion Principle

Hund's Rule

Electronegativity

Bohr Model

Exited State

Ground State

Photon

Light

Atomic Symbol

Cation

Anions

Delocalized Electrons.

The emitted particle is called photon which is responsible for the different color emission.

When an electron jumps from the higher energy orbit to a lower energy orbit, it releases energy in the form of photons (according to the particle theory of light), this is called photon emission.

The released photons will have different wavelengths and frequencies due to which photons will have different energies and color.

Like in chemical compounds, Heated compounds have acquired energy in the form of thermal energy. This thermal energy, if it is enough, excites electrons in any major atom in a compound or any singular lone atom so that the compound reaches one of its accessible excited states. This event is called an electronic excitation, and it leaves the compound less stable than in its ground state.

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The majority of the energy released in citric acid cycle reactions is conserved in the form of adenosine triphosphate (ATP).

What is citric acid cycle?
The Krebs cycle, also referred to as the TCA cycle or the citric acid cycle (CAC), is a set of chemical reactions that releases stored energy by oxidising acetyl-CoA, which is inferred from carbohydrates, fats, as well as proteins. Organisms a certain respire (as compared to organisms a certain ferment) use the Krebs cycle to produce energy, either through anaerobic or aerobic respiration. The cycle additionally supplies the reducing agent NADH and precursors of a few amino acids that are needed in a variety of other reactions. It may have originated abiogenically and became one of the earliest elements of metabolism given its central role in many biochemical pathways.

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Answer:

Hope this helps

Explanation:

hjnm

Process that is spontaneous is : d) mixture of two gases separating into pure compounds.

In thermodynamics, spontaneous process is that process which occurs without any external input to the system. A more technical definition can be the time-evolution of a system in which it releases free energy and moves to a lower, more thermodynamically stable energy state.

We can assess the spontaneity of  process by calculating entropy change of the universe. If ΔSuniv is positive, then we can say that the process is spontaneous. As spontaneous processes are characterized by decrease in  system's free energy, they do not need to be driven by an outside source of energy.

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The option d) is correct i.e. 1,2 - dimethyl cyclohexane which can exist as cis-trans isomers.

What are isomers?

Isomers are molecules that have the same chemical formula but different structures. This means that they contain the same number of atoms of each element, but they are arranged differently. Isomers can be divided into two categories: structural isomers, where the atoms are connected in different ways, and stereoisomers, where the atoms are connected the same way but arranged differently in space. An example of structural isomers is the difference between butane and isobutane, which are both made up of 4 carbons and 10 hydrogen atoms, but have different structures. An example of stereoisomers is the difference between D-glucose and L-glucose, which are both C6H12O6, but their atoms are arranged differently in space.

The compounds which same molecular formula and different connections are constitutional isomers.

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The structural formulas for the products of 1,2 and 1,4 addition of hydrogen chloride to 2,4−hexadiene is verified.

Define structural formula.

Chemical formulas known as structural formulas can provide a more thorough understanding of a substance than molecular formulas.

Explanation:

For the given reaction,

The first double bond receives an addition of H-Cl in the 1,2-addition reaction; the second double bond is not involved in the reaction.

However, in the 1,4-addition reaction, the first step is the same, but the second step is different because the location of the second double bond changes and Cl- is added to the fourth carbon because the second double bond demonstrates the need to stabilize the carbocation.

The reactions are represented in the following image.

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A corn growing into an adult tree will take the longest time to observe. Hence, the third option will be correct.

Thus the longest time is taken by the corn tree to grow into adult tree that is of 55 to 95 days.

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Answer:

a. glucose c. ribose b. adenine d. two phosphate groups user: all organisms need energy to perform different functions. cells are able to ...

When, where, and how much genes are expressed in each cell are all regulated by the histone proteins and epigenetic elements.

Histone proteins:

The eukaryotic cells include histone proteins, which serve two purposes. They support preserving DNA in a compact state and control how flexible and tight DNA strands are, which controls how genes are expressed.

Epigenetic factors:

The substances known as epigenetic regulators alter the gene to control how the gene expresses itself. These modifications neither result in mutations nor are they heritable. These are the transient alterations, such as DNA remodeling, methylation, and alkylation.

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The biomolecule with this ratio is water (H2O).

What is biomolecule?
A loose term for molecules found in organisms and necessary for one or more typical biological processes, including such cell division, morphogenesis, as well as development, is "biomolecule" or "biological molecule." Large macromolecules (as well as polyelectrolytes) like proteins, carbohydrates, lipids, as well as nucleic acids, in addition to small molecules like primary metabolites, secondary metabolites, and natural products, are all examples of what is referred to as a biomolecule. Biological materials is a more inclusive term for this category of materials. Living organisms depend on exogenous biomolecules, such as certain nutrients, to survive even though endogenous biomolecules, which are produced inside the organism, are frequently necessary.

Water is made up of two hydrogen atoms bonded to one oxygen atom. This bond forms a covalent bond, with the oxygen atom sharing its two outer electrons with the two hydrogen atoms. This results in a ratio of 1 carbon atom to 2 hydrogen atoms to 1 oxygen atom.

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For a solute to be quantified, one must know its mass or moles. By multiplying the grams of solute per gram of solution by 100, one may get the mass percent of a solution.

Because the overall amount remains constant, the starting concentration times the initial volume will equal the final concentration times the final volume. As a result, C1V1 = C2V2, which is an equation.

35 mL of ethanol and 65 mL of water combined to make a solution with a volume percent by volume of 35%. The mass or volume of solute required may also be determined if you know the concentration.

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Answer:

Here is a sample sale pitch poster about solar energy:

"Go Solar with Confidence!

Are you tired of rising energy costs and looking for a more sustainable solution? Solar energy is the answer!

Pros:

Solar energy is a clean and renewable source of electricity. It doesn't produce any harmful greenhouse gases or pollutants, making it a great choice for the environment.

Solar panels are easy to install and maintain, with a lifespan of 25-30 years.

Solar energy can save you money on your energy bills, especially if you live in a sunny location.

Cons:

The initial cost of installing solar panels can be high, although there are various financing options available to help offset this expense.

Solar energy is not always reliable, as it depends on the availability of sunlight. However, advances in solar panel technology have made it possible to generate electricity even on cloudy days.

Why is it great?

Solar energy is a reliable and cost-effective way to generate electricity for your home or business. It can help you reduce your carbon footprint and protect the environment for future generations.

Why is it bad?

The upfront cost of installing solar panels can be a barrier for some people. However, the long-term financial benefits of switching to solar energy can far outweigh this initial investment.

Can you overcome those downfalls?

Yes, by exploring financing options and taking advantage of government incentives and rebates, you can make the switch to solar energy more affordable.

Be to the point:

Solar energy is a clean, renewable, and cost-effective way to generate electricity. It has a long lifespan and can save you money on your energy bills. Don't wait any longer - make the switch to solar today!"

The VSEPR theory predicts the form of the molecule based on the bonding electron pairs and lone electron pairs around the core atom since molecular shape is dependent on the electrons surrounding the central atom.

Valence shell electron pair repulsion is the name given to the underlying concept in molecular structures (VSEPR). In essence, it states that because electron pairs are made up of negatively charged particles, they are attracted to one another and want to keep as far apart as possible.

Based on the number of valence shell electron bond pairs between the atoms in a molecule or ion, the valence shell electron pair repulsion (VSEPR) hypothesis is a model used to predict 3-D molecular shape.

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Response to inquiry A: We choose a carbon chain with the greatest number of carbon atoms according to the IUPAC nomenclature standard. Since there are 4 carbon atoms in this chain, butane is the parent molecule. The double bo is present in the molecule.

The Interdivisional Committee on Terminology, Nomenclature, and Symbols and Division VIII - Chemical Nomenclature and Structure Representation are two IUPAC groups that play major roles in this activity. IUPAC is the widely acknowledged authority on chemical nomenclature and terminology. One of IUPAC's main activities is the development of recommendations to establish unambiguous, uniform, and consistent nomenclature and terminology for particular scientific fields. These recommendations are typically presented as glossaries of terms for particular chemical disciplines, definitions of terms relating to a group of properties, nomenclature of chemical compounds and their classes, terminology, symbols, and units in a particular field, classifications and uses of terms in a particular field, and co-references. The Recommendations are printed in the Pure and Applied journal of the IUPAC.

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1) The noble gas is element 4.

2) The element that has the largest atomic radius is element 4.

3) The element that would form a +2 cation is element 3.

We define the ionization energy as the energy that we need so as to remove an electron from an atom. If the electron that we are referring to here is the first electron that is removed from the atom then we can call it more specificaly the first ionization energy. There are other ionization energies as more electrons are removed from the atom.

I see that it is important to say a couple of things about the noble gases that would help us decide on the answer. We know that the noble gas has to do with an element that is found in the eighteenth group of the periodic table and does has a complete octet.

This stability means that it is quite difficult to remove electrons from this atom hence the atom is quite stable.

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An object has reflection symmetry (line or mirror symmetry) if a line runs through it, dividing it into two mirror images of each other.

Reflection symmetry is a type of symmetry that pertains to reflections. Line symmetry and mirror symmetry are other terms for reflection symmetry. It states that if there is at least one line that divides a figure into two halves, with one half mirroring the other.

A biradial animal has only two planes of symmetry, one passing through the anteroposterior and sagittal axes and the other through the anteroposterior and transverse axes.

Thus, An object has reflection symmetry if a line runs through it, dividing it into two mirror images of each other.

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At constant temperature, 7.72 L of cl2 at 458 mmHg is compressed to 3.75 L. The final pressure of Cl₂ is 942.86 mmHg.

To calculate the final pressure we can use the boyle's law

According to Boyle's Law, the relationship between a gas's volume and pressure is inverse. In other words, it says that as long as the number of gas moles remains constant, the product of pressure and volume for an ideal gas at constant temperature remains constant. P1V1=P2V2, where P1 is the first pressure, V1 is the first volume, P2 is the second pressure, and V2 is the second volume, is one way to state it.

So, the final pressure of Cl₂ can be calculate as follows:

P1V1=P2V2

458mmHg x 7.72 L = P2 x 3.75 L

P2 = 458mmHg x 7.72

                 3.75 L

P2 = 942.86 mmHg

Therefore, at constant temperature, 7.72 L of cl2 at 458 mmHg is compressed to 3.75 L. The final pressure of Cl₂ is 942.86 mmHg.

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The energy contained within covalent bonds in molecules is a type of potential energy called chemical energy.

What is a chemical?

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Mitochondria is   responsible for the synthesis of ATP which is required for photosynthesis.

It is defined as a process by which plants and other photosynthetic organisms convert the light energy in to chemical energy  through the process of cellular respiration.

Some of the energy which is converted  is stored in molecules of carbohydrates like sugar and starches  which are made up of from carbon dioxide and water . Photosynthetic organisms which can perform photosynthesis  are algae and cyanobacteria. Photosynthesis is largely responsible for producing and maintaining the content of oxygen in earth's atmosphere.

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Your question is incomplete, but most probably your full question was:Which structure is responsible for the synthesis of ATP?

A.cell membrane

B.nucleus

C.lysosomes

D.mitochondria

E.vacuole

Answer:

1.75

Explanation:

if you add

If The Bond Angle Between Two Adjacent Hybrid Orbitals Is 180 Hybridization is Sp2.

A space object appears to follow an orbit as it moves around another space object. A satellite is a spacecraft that orbits the planet. A natural satellites that matches the Earth nor moon is one possibility. Moons are satellites in the orbits of numerous nations. A man-made satellite, such as the Space Stations, provides an additional choice.

The positions of the electrons are dictated by the entire molecule when several atoms unite chemically to form a molecule, combining the atomic orbitals into molecular orbitals. The molecular orbitals are occupied by the electrons of the component atoms. There are two electrons in each orbital, and their spins vary. An atom's orbital is the area of space where an electron resides.

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Answer:

Explanation:

It is generally true that when the potential energy of the products of a reaction is higher than the potential energy of the reactants, the reaction is less stable and less likely to occur spontaneously. This is because potential energy is a measure of the stored energy of a system, and when the potential energy of the products is higher than the reactants, it means that more energy is being stored in the products than in the reactants. This excess of energy makes the products less stable and more reactive, as they are seeking to release the excess energy and return to a more stable state.

On the other hand, when the potential energy of the reactants is higher than the potential energy of the products, the reaction is more stable and more likely to occur spontaneously. This is because the reactants have more potential energy, meaning that they are more reactive and seeking to release that energy in order to return to a more stable state. The products, on the other hand, have lower potential energy and are more stable, so the reaction is more likely to occur as the reactants seek to release their excess energy and reach a lower energy state.

Overall, the stability of a reaction depends on the relative potential energies of the reactants and products, with reactions being more stable when the potential energy of the reactants is higher than the potential energy of the products.

The wavelength of the light is 1200 nm and it is longer than red light.

The term wavelength has to do with the distance that has been traveled by a wave. We know that a wave is a disturbance on a medium that transfers energy and in this case, the red light is part of the electromagnetic spectrum of light.

We have the information from the question that the wavelength of radiation with a frequency of 2.50 x 10^15 HZ and the task that we have here is that we should be able to obtain the wavelength of the frequency that is given.

We then have;

c = λf

c = speed of the wave

λ = wavelength

f = frequency

Then;

λ = 3 * 10^8/ 2.50 x 10^15 HZ

λ =  1.2 * 10^-7 or 1200 nm

Since the wavelength of red light is 620 - 720 nm hence this is definitely longer than red light.

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The percentage of P in Ca(H2PO4)2 is 26.42%.

Relative molecular mass of Ca(H2PO4)2  

=40.07+(1×4)+(30.9×2)+(16×8)

=40.07+4+61.8+128

=233.87

Therefore, 233.87g Ca(H2PO4)2 contains 61.8g P.

So, 100g Ca(H2PO4)2 contains:

= 100×61.8/233.87 ​

=26.42

Therefore, the percentage of P in Ca(H2PO4)2 is 26.42%.

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The osmotic pressure of a solution that contains 0.026g of a hydrocarbon solute is 4.0 torr.

What is osmotic pressure?

Osmotic pressure is the pressure exerted by a solution due to the concentration of dissolved particles and the presence of a semipermeable membrane, which prevents the passage of some particles. This pressure can be present in both living and non-living systems. In living systems, osmotic pressure is the force that is responsible for the movement of water and other solutes across cell membranes. In non-living systems, osmotic pressure occurs when two solutions of different concentrations are separated by a semipermeable membrane. The higher the concentration of dissolved particles, the greater the osmotic pressure. Osmotic pressure plays an important role in the absorption and movement of water and other substances throughout the body. It is also important in industries such as food processing, pharmaceuticals, and biotechnology.

moles of solute=mass/molar mass =0.026/340g/mol=7.647×10⁻⁵

Molarity=moles/volume in solution

=7.647ₓ10⁻⁵/0.350L=0.000218M

osmotic pressure(Pi)=MRT

Pi=0.000218ₓ0.0821ₓ293

=0.00525atm

now,1 atm= 760 torr

so, 0.00525 atm= (760ₓ0.00525)

=3.99 torr

=4.00 torr

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The coefficients in front of Bro3-(aq) and Br-(aq) when the equation( BrO3 -(aq) + 5 Br-(aq) + 6H+(aq)→ 3Br2(aq) + 3H2O (l)) is balanced in an acidic solution is : 1, and  5 respectively.

A balanced equation is an equation for a chemical reaction in which number of atoms for each element in the reaction and the total charge are  same for both reactants and the products. Both the mass and charge are balanced on both sides of the reaction in a balanced equation.

A balanced equation is a chemical equation in which mass is conserved and there are equal number of atoms of each element on the both sides of the equation.

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Heat of combustion used to explain the relative stability of the compounds.

The heat of combustion definition is the variation in energy released in the form of heat through the burning of an amount of any substance, all reactants being in the standard state (temperature of 25 C and pressure of 1 atm).

When the amount is quantified for 1 mole of said substance, one can define this quantity as the molar heat of combustion.

The molar heat of combustion values are defined in kilojoules per mole (KJ/mol). The kilojoule is a unit of energy and corresponds to 1000 or Joules (J). Mole is a unit of measurement used to express the amount of matter.

Now sugar is a non electrolyte so comparatively more stable hence more energy required to decompose the sugar hence its heat of combustion value is -5639kJ/mol high.

Where as TNT used as an explosive so it is susceptible for reaction and combustion, hence low amount of heat of combustionnis required for TNT that is -3406kJ/mol whuch is comparatively lower.

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