Balance the equation. H3PO4 → H4P₂O7 +
H₂O

Option A is correct in this case that no reaction occurs between sodium chloride and acetic acid when mixed because acetic acid is a very weak acid, and it is unable to shift the ions of the salt.

Comparatively, the molecular equation provides information on the ionic molecules that served as the reaction's ion sources whereas the entire ionic equation provides information on all of the ions that were in solution during the reaction.

Even at greater temperatures, there is little probability that acetic acid and table salt will react in any way. Acetic acid is a relatively weak acid, while sodium chloride is a salt of hydrochloric acid, a strong acid. In most cases, a weaker acid does not displace a stronger acid from the salt of the latter.

Hence, when you combine acetic acid with sodium chloride, you only obtain a uniform, transparent combination. Equilibrium is shifted to the left side of the reaction as follows:

Na⁺Cl⁻ + CH₃COOH ⇄ H⁺Cl⁻ + CH₃COO⁻Na⁺

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Correct question is:

Select the net ionic equation for the reaction that occurs when sodium chloride and acetic acid are mixed.

(Refer the image for the correct options)

When reactants are mixed and heated and liquid collects in the sidearm of the apparatus, the process is known as condensation. This process occurs due to the conversion of a gas or vapor to a liquid state.

The process of condensation occurs as heat is lost from a vapor, which causes it to change its state from a gas to a liquid. When the vapor loses its heat and cools, the molecules slow down and come closer together, reducing the space between them, which causes them to stick together and form a liquid state. This liquid is then collected in the sidearm of the apparatus.

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Cleravage is a characteristic of mineral that is related to breaking along planes. The tendency of a mineral to break along flat, even surfaces or planes is known as cleavage,

and it depends on how the atoms are arranged inside the crystal structure of the material. Well-defined cleavage planes in minerals make them more likely to break readily along them, resulting in smooth, flat surfaces with certain geometric forms. As many minerals have varied cleavage qualities, minerals may be distinguished by the quantity and direction of their cleavage planes. Mica minerals, for instance, have good basal cleavage, which means they frequently fracture along a single plane to form thin, flexible sheets. Calcite tends to break along three planes that cross at angles other than 90 degrees because it possesses rhombohedral cleavage.

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When the flashlight is turned on and the lights are turned off, the white paper on the wall will appear bright as it reflects the light from the flashlight. However, when a clear plastic is placed in front of the flashlight, the light hitting the white paper on the wall will be affected.

The clear plastic acts as a lens, which changes the direction and intensity of the light passing through it. As the light passes through the plastic, it refracts or bends, causing the beam of light to spread out or focus. This results in a change in the shape and size of the light beam hitting the white paper on the wall.

The effect of the plastic on the light hitting the paper will depend on the shape and thickness of the plastic, as well as its distance from the flashlight. In general, the plastic will cause the light beam to spread out or focus differently, resulting in a change in the appearance of the light hitting the paper on the wall.

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When 4 moles of sodium fully react, 2 moles of hydrogen are produced as a whole. The right answer is B.

The balanced equation for the reaction between sodium and water is 2Na + 2H2O → 2NaOH + H2. This equation shows that 2 moles of sodium react with 2 moles of water to produce 1 mole of hydrogen gas.

If 4 moles of sodium react completely, we can calculate the amount of hydrogen produced by using stoichiometry. Since 2 moles of sodium produce 1 mole of hydrogen, 4 moles of sodium will produce 2 moles of hydrogen (4 moles Na x 1 mole H2 / 2 moles Na = 2 moles H2).

Therefore, the total number of moles of hydrogen produced when 4 moles of sodium react completely is 2 moles. The correct answer is B.

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4974.9 kJ of energy are released during the interaction between 162.5 g of O2 and 216.7 g of NH3.

The given chemical equation shows the reaction between ammonia (NH3) and oxygen (O2) to form nitrogen monoxide (NO) and water (H2O). The enthalpy change (ΔH) for this reaction is -1225.6 kJ per mole of O2 consumed.

To determine the energy given off by the reaction between 162.5 g of O2 and 216.7 g of NH3, we need to first determine the limiting reactant. This is the reactant that is completely consumed in the reaction and limits the amount of product formed.

To find the limiting reactant, we need to calculate the number of moles of each reactant. The molar mass of O2 is 32.00 g/mol, so 162.5 g of O2 is equivalent to 5.078 moles of O2. The molar mass of NH3 is 17.03 g/mol, so 216.7 g of NH3 is equivalent to 12.71 moles of NH3.

The stoichiometric ratio of O2 to NH3 is 5:4, meaning that for every 5 moles of O2 consumed, 4 moles of NH3 are required. From the above calculations, we can see that there is excess NH3 in this reaction since only 4.063 moles of O2 are required to react with 3.250 moles of NH3.

Therefore, the amount of O2 that reacts is 4.063 moles, and the energy given off by the reaction is:

ΔH = (-1225.6 kJ/mol) x (4.063 mol) = -4974.9 kJ

Therefore, the reaction between 162.5 g of O2 and 216.7 g of NH3 gives off 4974.9 kJ of energy.

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A photon of light has an energy of 3.977 x [tex]10^{-19}[/tex] joules and a wavelength of 0.050 centimetres.

The energy of a photon is related to its wavelength by the formula E = hc/λ, where E is the energy, h is Planck's constant (6.626 x [tex]10^{-34}[/tex] joule seconds), c is the speed of light (2.998 x [tex]10^{8}[/tex] meters per second), and λ is the wavelength of the photon.

To use this formula, we need to convert the wavelength of the photon from centimeters to meters, since c is given in meters per second. We can do this by dividing 0.050 cm by 100, which gives us 5.0 x [tex]10^{-4}[/tex]meters.

Now we can plug in the values we have into the formula: E = (6.626 x [tex]10^{-34}[/tex] joule seconds) x (2.998 x [tex]10^{8}[/tex] meters per second) / (5.0 x [tex]10^{-4}[/tex]meters)

Simplifying the equation, we get:

E = 3.977 x [tex]10^{-19}[/tex] joules

Therefore, a photon of light with a wavelength of 0.050 cm has an energy of 3.977 x [tex]10^{-19}[/tex] joules. It is important to note that photons are the smallest quantifiable packets of electromagnetic energy, and their energy is directly proportional to their frequency and inversely proportional to their wavelength.

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It follows the principles of Atom Economy, Less Hazardous Chemical Syntheses, Safer Solvents and Auxiliaries, Reduce Derivatives, and Catalysis from the Twelve Principles of Green Chemistry.

Green Chemistry is a branch of chemistry that focuses on the design of chemical products and processes that are environmentally sustainable, safe, and economically viable. It seeks to minimize the environmental impact of chemical reactions and reduce or eliminate the use and generation of hazardous substances in chemical production.

Methyl-4-methoxycinnamate is a commonly used compound in the fragrance and cosmetic industries. Here are the Twelve Principles of Green Chemistry and the principles that are followed in the synthesis of Methyl-4-methoxycinnamate:

2. Atom Economy: The synthesis of Methyl-4-methoxycinnamate has a good atom economy because the reaction involves the direct condensation of two starting materials, and no by-products are generated.

3. Less Hazardous Chemical Syntheses: The reaction conditions in the synthesis of Methyl-4-methoxycinnamate are relatively mild, and the reactants and products are non-toxic.

4. Safer Solvents and Auxiliaries: Ethanol is used as a solvent in the reaction, which is a safer solvent than other solvents that may be used in similar reactions.

5. Reduce Derivatives: The synthesis of Methyl-4-methoxycinnamate does not involve any unnecessary derivatization steps.

6. Catalysis: Sodium hydroxide is used as a catalyst in the reaction, which helps to increase the rate of the reaction.

Overall, the synthesis of Methyl-4-methoxycinnamate follows the principles of Atom Economy, Less Hazardous Chemical Syntheses, Safer Solvents and Auxiliaries, Reduce Derivatives, and Catalysis from the Twelve Principles of Green Chemistry.

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To eject electrons with 2.2 x 10^-19 J of energy is 1.42 x 10^15 Hz.

what is the photon frequency needed? Chromium metal has a binding energy of 7.21 x 10^-19 J for certain electrons. So, the energy needed to eject the electrons is: Energy needed = Binding energy + Ejected electrons' energy = 7.21 x 10^-19 J + 2.2 x 10^-19 J = 9.41 x 10^-19 JNow, we know the energy needed to eject electrons is 9.41 x 10^-19 J. And we know that the energy of a photon is given by E = hν, where h is Planck's constant and ν is the frequency of the photon. To find the photon frequency needed, we can use the equation:

E = hνν = E/hν = (9.41 x 10^-19 J) / (6.63 x 10^-34 J·s)ν = 1.42 x 10^15 Hz

Hence, the photon frequency needed to eject electrons with 2.2 x 10^-19 J of energy is 1.42 x 10^15 Hz.

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Answer:

large atomic size and low ionization energy.

Explanation:

Metallic behavior correlates with large atomic size and low ionization energy. Thus, metallic behavior increases down a group and decreases from left to right across a period. Elements in Groups 1A(1) and 2A(2) are strong reducing agents; nonmetals in Groups 6A(16) and 7A(17) are strong oxidizing agents.

To prepare 100ml of a 1:100 dilution, you need to take 1ml from the 4.1m concentrated stock solution. The total volume you will need is 2.44 ml, which can be rounded up to a whole integer.

To prepare a diluted 1 solution with 100 ml, how much volume in ml will you need to take from 4.1 m concentrated stock.

To prepare a diluted 1 solution with 100 mL, 2.44 mL volume from 4.1 M concentrated stock solution is required.

Volume required for preparing a diluted 1 solution can be calculated using the dilution formula.C1V1 = C2V2.

The stock concentration (C1) is 4.1 M. The final concentration (C2) is 1.0 M. The final volume (V2) is 100 mL. The required volume of stock can be calculated from the above formula.

C1V1 = C2V2

4.1×V1 = 1.0×100

V1=1.0×100

4.1=2.44 mL.

Therefore, to prepare a diluted 1 solution with 100 mL, 2.44 mL volume from 4.1 M concentrated stock solution is required.

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Moreover, the process of crystallization involves the mass transfer of a solute from a liquid solution to a pure solid crystalline phase.

Crystallization is the process when a solute transfers from a liquid solution to a pure solid crystalline substance. In this process, the solute molecules or ions in a solution come together to form a crystal lattice, resulting in the formation of a solid phase. This process is commonly used in chemical and pharmaceutical industries to purify substances or to obtain a specific crystal form. The conditions under which crystallization occurs, such as temperature, concentration, and solvent choice, can significantly impact the properties of the resulting crystals.

Crystallization is used in the purification of chemicals to obtain a pure compound from a mixture. By controlling the temperature and concentration of the solution, the impurities are excluded from the growing crystal lattice, leaving a pure compound behind.

Crystallization is used in the production of pharmaceuticals to obtain pure crystals of the active pharmaceutical ingredient (API). The crystal form of the API can impact its solubility, stability, and bioavailability, making crystallization a crucial step in the production of pharmaceuticals.

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Ion channels that open and close in response to a change in membrane potential are called voltage-gated ion channels.

Voltage-gated ion channels are a specialized type of membrane protein that are embedded in the lipid bilayer of excitable cells. They have a pore that allows ions to flow through, and they can be selective for different types of ions, such as sodium (Na+), potassium (K+), or calcium (Ca2+).

The opening and closing of the channel's pore is controlled by changes in the membrane potential, which is the difference in electrical charge across the cell membrane.

These channels are crucial for the generation and propagation of electrical signals in excitable cells, such as neurons and muscle cells. Voltage-gated ion channels are capable of detecting small changes in membrane potential and responding by opening or closing their pore, allowing ions to flow across the membrane and alter the electrical state of the cell.

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Hybridization depends on the charge distribution and electronic configuration of atoms present in the molecule. Option c is the correct answer.

Three major contributing resonance structures are possible for the following cation. The one is already given. Draw the remaining structures (in any order), including nonbonding electrons and formal charges.

Omit curved arrows.There are three possible resonance structures of cation as shown in the figure below: Contributing resonance structures. There are two possibilities of charge distribution in the cation.

The carbon can be positively charged, or the sulfur can be positively charged. Therefore, two structures out of three have the positive charge on carbon, and one structure has the positive charge on sulfur.

Therefore, option c) The structures with the positive charge on carbon contributes most to the hybrid.

Hybridization is the combination of the atomic orbitals of the same or nearly same energy level in an atom to form a new set of hybrid orbitals having characteristics different from the original atomic orbitals.

Hybridization depends on the number of sigma bonds an atom is involved in, and the number of lone pair electrons that atom is having. It also depends on the electronegativity of atoms present in the molecule.

In this molecule, the sulfur atom has no lone pair electrons and is involved in two sigma bonds with two carbon atoms. So, the hybridization of sulfur in this molecule is sp2.

The carbon atoms present in the molecule have one lone pair electron and are involved in two sigma bonds each. So, the hybridization of carbon atoms in the molecule is sp2.

Hence, hybridization depends on the charge distribution and electronic configuration of atoms present in the molecule. Option c is the correct answer.

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Yes, the investigation did answer the question about whether two magnets create magnetic force fields that allow them to interact without touching. The investigation provided enough evidence to support the idea that invisible magnetic force fields exist.

The investigation provided enough evidence to support the idea that invisible magnetic force fields exist:

The investigation involved observing how two magnets interact with each other without touching. The magnets were brought closer together until they interacted, and then they were moved further apart. This process was repeated several times, and the results were observed and recorded. During the investigation, it was observed that the magnets interacted with each other even when they were not touching. This interaction occurred because the magnets created magnetic force fields that allowed them to interact with each other even when they were not in direct contact.The observation of the interaction between the magnets provided enough evidence to support the idea that invisible magnetic force fields exist. This is because the interaction between the magnets could not be explained by any other means except through the existence of magnetic force fields. Therefore, the investigation gave enough evidence to support the idea that invisible magnetic force fields exist.

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A liquid-gas system at equilibrium is disturbed by adding or removing vapor from the system (at constant temperature). The correct statements for the vapor pressure regarding this situation are A, B, and D.

A. Adding vapor will cause a temporary increase in vapor pressure: When the vapor is added to the system, the total vapor pressure increases, and the vapor pressure in the system is greater than the original equilibrium vapor pressure until the system re-equilibrates.

B. Adding or removing vapor will result in a new equilibrium vapor pressure: The equilibrium vapor pressure will be affected by the addition or removal of vapor. When the vapor is added or removed, the system must reach a new equilibrium between the vapor and liquid phases before the vapor pressure returns to the original equilibrium value.

D. Removing vapor will cause a temporary increase in the rate of condensation: When the vapor is removed from the system, the total vapor pressure decreases, and the rate of condensation of the liquid phase will increase until the system re-equilibrates.

Statement C. when equilibrium is re-established after a disturbance in a liquid-gas system, the vapor pressure will be the same: is incorrect. When a system is disturbed by adding or removing vapor, the new equilibrium vapor pressure is different from the original equilibrium vapor pressure.

Therefore, the correct statements for the vapor pressure of the system are A, B, and D.

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The Robinson annulation is a reaction that involves the conjugate addition of a stabilized carbanion to an alpha,beta-unsaturated ketone, followed by intramolecular aldol condensation.

The Robinson annulation reactions are in the image attached below

The reaction proceeds in two steps: in the first step, the carbanion attacks the electrophilic carbon of the alpha,beta-unsaturated ketone, forming a new carbon-carbon bond. In the second step, the newly formed double bond acts as a nucleophile and attacks the carbonyl group of the same molecule, leading to the formation of a cyclic product. The Robinson annulation is a powerful method for the synthesis of cyclic compounds, particularly those containing a six-membered ring with an alpha,beta-unsaturated ketone as a key intermediate.

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Complete question:

Draw the product obtained by heating each pair of ketones in a basic solution.

The figure is in the image attached below

The solute's classification refers to the extent to which it dissociates into ions in water.

Electrolytes are solutes that dissociate into ions to a considerable extent when dissolved in water. These solutes conduct electric current in aqueous solutions. Strong electrolytes dissociate entirely into ions in water, while weak electrolytes only dissociate partially into ions.

Non-electrolytes are solutes that do not dissociate into ions when dissolved in water. Therefore, they do not conduct electric current. Examples of nonelectrolytes include sugar and alcohol.

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The molarity of the diluted solution is 0.2618 M.

The molarity of the diluted solution can be calculated using the formula:

  M₁V₁ = M₂V₂,

where M₁ is the initial molarity, V₁ is the initial volume, M₂ is the new molarity, and V₂ is the new volume.

In this case:

Plug these numbers into the formula to calculate the molarity of the diluted solution (M₂):

  M₁V₁ = M₂V₂,

  1.2 * 120 = M₂ * 550

  M₂ = 0.26181...

  M₂ = 0.2618 M (rounded to four significant figures).

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Answer: False

Explanation:

The intensity of the infrared (IR) absorption bands is proportional to the amount of a particular functional group present in a molecule.

IR spectroscopy is a powerful technique used to study the vibrations of chemical bonds in molecules. When a molecule absorbs IR radiation, its chemical bonds are excited and vibrate in different ways, resulting in characteristic absorption bands that can be used to identify the functional groups present in the molecule.

The intensity of these bands is proportional to the number of bonds of a particular functional group that absorb IR radiation, as well as the strength of these bonds. Therefore, the intensity of the IR absorption bands provides information about the composition and structure of a molecule, allowing researchers to identify and study its chemical properties.

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Answer:

The first and third digit of the VSEPR notation indicate the number of electron groups and lone pairs on the central atom, respectively. This information is used to determine the molecular geometry of a molecule. For example, in the notation AX3E2, the first digit "3" represents three electron groups around the central atom, while the third digit "2" represents two lone pairs on the central atom, leading to a trigonal bipyramidal molecular geometry.

Explanation:

The VSEPR (Valence Shell Electron Pair Repulsion) number is a shorthand notation used to describe the molecular geometry of a molecule based on the number of electron groups (bonding and non-bonding) around the central atom.

The first digit of the VSEPR number indicates the number of electron groups around the central atom, while the third digit indicates the number of lone pairs on the central atom.

For example, in the VSEPR notation AX3E2, the first digit "3" indicates that there are three electron groups around the central atom, and the third digit "2" indicates that there are two lone pairs on the central atom. This notation corresponds to a trigonal bipyramidal molecular geometry, where three bonding pairs and two lone pairs are arranged symmetrically around the central atom.

Answer:

Explanation:The volume of a gas 100mmHg pressure and at 40°C is 480mL. What volume does the gas occupy at standard temperature and pressure

Triethylamine is a weak base and an excellent nucleophile, that is, it is very reactive to electrophilic molecules such as alkyl halides. Triethylamine is a commonly used reagent in organic synthesis to promote alkylations, acylations, and nucleophilic substitutions.Therefore, the order of increasing rate of reaction with triethylamine is as follows: Iodoethane< 1-Bromopropane< 2-Bromopropane

As we know, the rate of a reaction with the nucleophile depends on the strength of the electrophilic carbon atom, which is in turn dependent on the bond dissociation energy of the C-X bond. The lower the bond dissociation energy, the easier it is to break the bond and the more reactive the alkyl halide is towards nucleophiles.

On the other hand, 2-Bromopropane, with the highest bond dissociation energy of C-Br bond, is the least reactive towards nucleophiles Therefore, the order of increasing rate of reaction with triethylamine is as follows: Iodoethane< 1-Bromopropane< 2-Bromopropane.

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MnO4- acts as an oxidizing agent, whereas SO2 acts as a reducing agent.

An oxidizing agent is a chemical species that causes oxidation in another substance by receiving electrons from it. To put it another way, it is a chemical that makes it easier for electrons to move from the object being oxidized to itself.

When an oxidation occurs, electrons are lost or the oxidation state is increased; when a reduction occurs, electrons are gained or the oxidation state is decreased.

In this equation, MnO4- + SO2 + H2O → Mn2+ + SO42- + 2H+

Because it causes SO2 to undergo oxidation (i.e., lose electrons) and goes through reduction itself, MnO4- is the oxidizing agent in this equation (i.e., gains electrons).

Due of its ability to both reduce MnO4- and oxidize itself, SO2 is the reducing agent.

Mn2+ is not an oxidizing agent because it is the end result of the reduction of MnO4-.

As SO42- is a byproduct of SO2 oxidation, it cannot act as a reducing agent.

MnO4- is therefore the oxidizing agent, whereas SO2 is the reducing agent.

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Answer:

True. The limiting reagent is the reactant that is completely consumed in a chemical reaction and limits the amount of product that can be formed. The theoretical yield is the maximum amount of product that can be obtained from the limiting reagent, assuming that the reaction goes to completion and no side reactions occur. However, in practice, it is common for side reactions to occur, which can reduce the actual yield of the product. Therefore, while the limiting reagent does control the theoretical yield of a reaction, the actual yield may vary due to the presence of side reactions or other factors that can affect the efficiency of the reaction.

Explanation:

Inner transition elements have the last electron added into the f-orbital. Thus, the correct option will be C.

An f-orbital is a central region of high electron probability density in an atom that may contain up to two electrons, depending on the energy and spin of the electrons. It has a more complex shape than s, p, and d orbitals.

In atoms, the f-orbital's quantum number is l = 3. It has seven orbitals in total. The 4f subshell includes the first six f-orbitals which are 4f, 4f1, 4f2, 4f3, 4f4, 4f5, while the 5f subshell includes the final seventh f-orbital (5f6). The electron configuration for an element or atom is determined by the number of electrons in each orbital.

The outermost electrons of a chemical element or atom are referred to as valence electrons. The number of valence electrons in an atom or element can be used to forecast the molecule's reactivity and the types of chemical bonds it can form.

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The Lewis dot structures for the polyatomic ions NH₄⁺, PO₄³⁻, NO₃⁻, CO₃²⁻ as well as the electron dot structures of the CH₂F₂ and OF₂ are shown in the attachment.

Lewis dot structures or electron dot structures are diagrams that show the bonding between atoms in a molecule and the lone pairs of electrons that may exist in the molecule.

In these structures, the symbol of each element represents its atomic nucleus and inner-shell electrons, while dots or lines surrounding the symbol represent valence electrons that participate in bonding. The structures allow us to predict the number and type of bonds in a molecule and its shape, as well as to understand its chemical reactivity.

The shape and bond angles of the molecules CH₂F₂ and OF₂ can be determined using VSEPR theory:

CH₂F₂:

The central atom, carbon (C), has four electron groups (two single bonds to hydrogen and two single bonds to fluorine).

The electron geometry is tetrahedral, and the molecular geometry is also tetrahedral.

The bond angles are approximately 109.5 degrees.

OF₂:

The central atom, oxygen (O), has two electron groups (one double bond to fluorine and two lone pairs of electrons).

The electron geometry is tetrahedral, and the molecular geometry is bent.

The bond angle is approximately 103 degrees.

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I will offer a broad response based on the common equation for photosynthesis because precise formulae or experiments are not provided:

C6H12O6 + 6O2 = 6CO2 + 6H2O + sunshine.

The total mass of the reactants and products in each chemical reaction must match, according to the Law of Conservation of Mass. This means that in the case of photosynthesis, the number of atoms of each element present in the reactants and the number present in the products must be equal. One molecule of glucose (C6H12O6) and six molecules of oxygen (O2) are present on the reactant side of the equation, which contains six molecules of carbon dioxide (CO2) and six molecules of water (H2O). It is evident that the equation is balanced and adheres to the Law of Conservation of Mass by counting the number of atoms of each element on both sides of the equation.

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A sense strand is the mRNA strand that is translated from a DNA strand with a same nucleotide sequence. the codons have specific functions when the mRNA sequence is translated into a protein.

The DNA sequence serves as a template for the synthesis of a complementary mRNA molecule during transcription. The nucleotide arrangement of the DNA template strand dictates the sequencing of the mRNA. The mRNA sequence is not identical to the template DNA strand; rather, it is complementary to it. RNA polymerase, which builds the mRNA molecule on the DNA template strand, adds complementary RNA nucleotides to the lengthening mRNA chain. Since RNA nucleotides have uracil (U) as a base instead of thymine (T), the mRNA sequence will have the same nucleotide sequence as the DNA template strand. The mRNA sequence is read in groups of three nucleotides called codons, and the codons have specific functions when the mRNA sequence is translated into a protein.

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