On the basis of oxidation states,ranking of metals to catalyze oxidation-reduction reactions is - manganese, vanadium and titanium.
In science, the oxidation state, or oxidation number, is the speculative charge of an iota in the event that its bonds to various particles were all completely ionic. It depicts the level of oxidation (loss of electrons) of a particle in a substance compound. Reasonably, the oxidation state might be positive, negative or zero. While completely ionic bonds are not found in nature, many bonds areas of strength for show, making oxidation express a valuable indicator of charge.
The oxidation state of an atom doesn't address the "genuine" charge on that particle, or some other real nuclear property. This is especially valid for high oxidation states, where the ionization energy expected to create a duplicate positive particle is far more prominent than the energies accessible in synthetic responses.
Since,manganese exist in oxidation state from +2 to +7,so it is more reactive.Same with vanadium and titanium also,vandium have oxidation state from +2 to +4 whereas titanium exist in +3 oxidation state only.
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The concentration of c29h60 in summer rainwater collected in hannover, germany, is 34 ppb. Find the molarity of c29h60 and express the answer in nm(nano molarity), 2 s. F, no scientific notation and no units.
The molarity of C29H60 in summer rainwater collected in Hannover, Germany, is 0.000034 M, or 34 nM.
To convert from parts per billion (ppb) to molarity, we need to know the number of moles of C29H60 present in a given volume of rainwater. We can use the concentration in ppb and the volume of the rainwater to calculate the number of moles of C29H60.
Concentration (ppb) = moles of solute / volume of solution (L)Rearranging this equation, we can calculate the number of moles of solute:
moles of solute = concentration (ppb) * volume of solution (L)Since 1 ppb is equal to 1 g/L, the number of moles can also be calculated using the mass of C29H60 and its molecular weight:
moles of solute = mass of solute / molecular weightThe molarity of the solution is then given by:
molarity = moles of solute / volume of solution (L)We can now convert this molarity to nano molarity (nM) by multiplying by 10^9:
nM = molarity * 10^9So the molarity of C29H60 in summer rainwater collected in Hannover, Germany, is 0.000034 M, or 34 nM.
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What are 3 important rules to remember when naming ionic compounds?
When naming ionic compounds, there are several rules that should be followed. Here are three important rules to remember:
1) Use the name of the cation first
2) Use the correct suffix for the anion
3) Use Roman numerals to indicate the charge of the cation
1) Use the name of the cation first: In an ionic compound, the name of the cation comes first, followed by the name of the anion. For example, in the compound NaCl, the cation is sodium and the anion is chloride.
2) Use the correct suffix for the anion: The suffix for the anion depends on its charge. For example, if the anion has a single negative charge, the suffix is "-ide". So, chloride becomes chloride ion (Cl-) and sulfide becomes sulfide ion (S2-).
3) Use Roman numerals to indicate the charge of the cation: If the cation can have multiple charges, the charge must be specified using a Roman numeral in parentheses. For example, iron (III) chloride (FeCl3) indicates that the iron cation has a +3 charge. The Roman numeral is equal to the charge of the cation.
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Give group 18 periodic table
The group 18 in the periodic table is the noble gases. The elements are The elements are helium , neon , argon, krypton, xenon, radon, and oganesson.
The group 18 group belongs to the noble gases in the periodic table and the elements belongs to the group 18 is as follows :
Helium Neon Argon Krypton Xenon Radon Oganesson.The Group 18 is also called as the zero group because the elements belongs to this group have the zero valency or the tendency to react with other elements also is zero. That means they are chemically unreactive and they are the most stable elements in the periodic table.
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A periodic wave with wavelength = 2m has speed v = 61
S
What is the wave's frequency?
Round answer to one significant digit.
Hz
Answer:
30.5 Hz
Explanation:
Speed of sound = wavelength x frequency
61 = 2m x Frequency(Hz)
Frequency = 61/2
= 30.5 Hz
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N8H10 help for Chen pleased
A solution is made using 180. 3 g of hexane (mm = 86. 18 g/mol) and 200. 0 g of octane (mm = 114. 2 g/mol). What is the molality of the hexane in the solution?.
The molality of hexane in the solution is 7.32 mol/L. This can be calculated by dividing the mass of hexane by the mass of the solvent, which is octane.
To find the molality, we first need to find the number of moles of hexane in the solution. This can be done by dividing the mass of hexane (180.3 g) by its molecular weight (86.18 g/mol), resulting in a value of 2.09 moles. Next, we need to find the mass of the solvent, which is octane (200.0 g). To convert the mass of the solvent to its equivalent in liters, we use the density of octane, which is approximately 0.703 g/mL at 25°C.
Dividing the mass of octane by its density gives us a volume of 284.9 mL, which is equivalent to 0.2849 L. Finally, the molality can be found by dividing the number of moles of hexane by the volume of the solvent in liters:
2.09 moles ÷ 0.2849 L = 7.32 mol/L.
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what is the buffer definition of chemistry?
The buffer solution definition of the chemistry is the solution that usually containing the acid and the base, or the salt, that tends to maintain the constant hydrogen ion concentration.
The buffer solution is the acid or the base of the aqueous solution consisting of the mixture of the weak acid and its conjugate base, or the vice versa. Its resist the pH change when the small amount of the strong acid or the base is added to it.
This types of the solution of the reserve acidity or the alkalinity which will resists the change of the pH of the solution upon the addition of the small amount of the acid or the alkali.
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Can somebody help me with these (in the pictures) I’m confused! Thanks!
The pressure exerted by the individual gases in a mixture is called the partial pressure. Here the equilibrium partial pressure of PCl₅ is 0.038 , PCl₃ is 0.662 and Cl₂ is 0.662.
What is equilibrium constant?The ratio of the product of molar concentrations of the products to that of the reactants with each concentration term raised to a power equal to its coefficient in the balanced chemical equation is the equilibrium constant.
In terms of partial pressures, equilibrium constant Kp is:
Qp = pPCl₅ / (pPCl₃ ) (pCl₂)
= 0.20 / 0.5 × 0.5
= 0.8
Here Qp > Kp, so the reaction shift towards reactant side.
The ICE table is:
PCl₃ + Cl₂ ⇄ PCl₅
I 0.50 0.50 0.20
C +x +x -x
E 0.50 + x 0.50 + x 0.20 - x
Kp = 0.200 -x / (0.5+x)(0.5+x)
0.0870 = 0.200 -x / (0.5+x)(0.5+x)
x = 0.162
The equilibrium partial pressures of PCl₃ and Cl₂ are:
0.5 + x = 0.5 + 0.162 = 0.662 atm
The equilibrium partial pressures of PCl₅ is:
0.200 - 0.162 = 0.038 atm
Thus the equilibrium partial pressures of PCl₃ , PCl₅ and Cl₂ are determined.
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What is the answer for P2o4 decomposition
The decomposition reaction of phosphorus tetra oxide (P₂O₄) is as follows:
4 P₄O₆ ⇒ P₄ + 6 P₂O₄
What is decomposition reaction ?A decomposition reaction is a reaction in which a compound terminates into two or more simpler substances.
The general form of a decomposition reaction is: AB→A+B. Most decomposition reactions involve an input of energy in the form of heat, light, or electricity.
4 P₄O₆ ⇒ P₄ + 6 P₂O₄ this is an example of decomposition reaction of phosphorus oxide.
Thus, The decomposition reaction of phosphorus tetra oxide (P₂O₄) is 4 P₄O₆ ⇒ P₄ + 6 P₂O₄
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3) Calculate the Theoretical Yield of aspirin if 9.8g of salicylic acid is used
with excess acetic anhydride?
Mass of SA 138.12g/mol
• Mass of Aspirin 180.16g/mol
One mole of acetic anhydride reacts with one mole of salicylic acid to give one mole of aspirin. Then, 9.8 g of salicylic acid will give 12.7 g of aspirin.
What is aspirin ?Aspirin is used as an analgesic in medicines. It is acetyl salicylic acid formed by the reaction of salicylic acid and acetyl anhydride.
The theoretical yield of a reaction is determine from the balanced chemical equation of the reaction. The actual yield might be lower than the theoretical yield.
One mole of salicylic acid reacts to give one mole of the product aspirin.
molar mass of salicylic acid = 138.12 g/mol
molar mass of aspirin = 180.16 g/mol
then mass of aspirin produced from 9.8 g of salicylic acid is :
(9.8 × 180.16)/138.12 = 12.7 g.
Therefore, the theoretical yield of the reaction is 12.7 g.
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In Part C of the experiment, you added a 6.0 NaOH solution to the aqueous solution of NaCl. Did the addition of the NaOH solution change the identity of the NaCl solute in the water? If so indicate the new identity.
Group of answer choices
a. Yes. Adding NaOH changed the NaCl to NaOH
b. No. Adding NaOH did not change the identity of the NaCl
c. Yes. Adding NaOH changed the NaCl to NaHClO
d. Yes. Adding NaOH changed the NaCl to NaClO
e. Yes. Adding NaOH changed the NaCl to water
No. Adding NaOH did not change the identity of the NaCl. (option b). When NaOH (sodium hydroxide) is added to an aqueous solution of NaCl (sodium chloride), a chemical reaction occurs, which is called a neutralization reaction.
This reaction forms NaCl (sodium chloride) and H2O (water) as the end products. The chemical equation for this reaction can be represented as follows:
NaCl + NaOH -> NaCl + H2O.As we can see from this equation, NaCl is not changed and remains in its original form, only the OH- ions from NaOH react with the H+ ions from HCl to form water. Therefore, the identity of NaCl remains unchanged even after the addition of NaOH solution.
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True or False? the rate limiting step in a reaction is the slowest step in the reaction sequence.
The given statement is true. The rate limiting step in a reaction is the slowest step in the reaction sequence.
In chemical kinetics, the slowest step, sometimes referred to as the rate-determining step or rate-limiting step, frequently roughly determines the total pace of a reaction.
The reaction's slowest step is used to generate the rate equation. Writing rate equals the rate constant of the slowest step times the concentrations of the reactant or reactants raised to their reaction order is how you build up a rate equation.
2A + B → C + D using the following two stages, the first step is referred to as the rate-determining step of the reaction since the total rate of the reaction is equal to the rate of the slow first step. The rate of the reaction in the aforementioned equation depends on the rate constant k.
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I need help with this. Thank youuuuuuu
The number of atoms in 3 moles K of the particle is 1.806 x 10²⁴ atoms.
What is the number of atoms in the given moles?
The value of one mole of an atom is equal to exactly 12 grams of pure carbon-12.
12.00 g (C-12 ) = 1 mol C-12 atoms = 6.02 × 10²³ atoms .
The number of particles in 1 mole is called Avogadro's Number (6.0221421 x 10²³).
The number of atoms in 3 moles K of the particle is calculated as follows;
= 3 moles x 6.02 × 10²³ atoms / mol
= 1.806 x 10²⁴ atoms
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what is the ph of a solution that contains 11.7g of nacl for every 200 ml of solution?
Answer:
Explanation:
The pH of a solution that contains 11.7 g of NaCl for every 200 mL of solution cannot be determined from the information provided. The pH of a solution depends on the concentration of hydrogen ions (H+) present in the solution. The presence of NaCl in the solution does not directly affect the pH of the solution.
NaCl is a neutral salt, meaning it does not affect the pH of a solution when it is dissolved in water. In order to determine the pH of the solution, we would need to know the concentration of hydrogen ions (H+) in the solution.
Calculate the effective nuclear charge (Zeff) experienced by the 1s and 2s electrons of the Sulfur atom (S).
A. 2,0
B. 16,10
C. 12, 6
D. 16,14
E. 8,7
F. 10,16
The effective nuclear charge (Zeff) experienced by the 1s and 2s electrons of the Sulfur atom (S) is 16, 14. Option D is correct answer.
The effective nuclear charge (Zeff) = Z – S, where Z is the atomic number and S is the number of shielding electrons.
S has 16 protons and its 1s electrons are shielded only by the 0 electrons, therefore they experience an effective nuclear charge,
Zeff = 16 − 0 = 16.
S has 16 protons and its 2s electrons are shielded only by the two 1s electrons, therefore they experience an effective nuclear charge,
Zeff = 16 − 2 = 14.
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Draw IF4+ lewis structure
how to tell if a molecule is polar
When the common pair of electrons between the two molecules is not at an equal distance, the covalent bond compound is said to be polar.
The difference in electronegativity between the two elements must be between 0.5 and 1.6 for a bond to be polar. The bond is nonpolar if the difference in electronegativity is smaller than 0.5. If the ratio is more than 1.6, the molecules instead form charged ions and ionic bonds. We will also be aware of it. The molecule is nonpolar if the arrangement is symmetrical and the lengths of the arrows are equal. The molecule is unstable if the arrows have various lengths and do not balance one another.
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an nacl solution is prepared by dissolving 90.0 g nacl in 250.0 g of water at 25°c. what is the vapor pressure of the solution if the vapor pressure of water at 25°c is 23.56 torr?A. 21.21 torr B. 2.354 torr 1C. 239 torr D. 19.28 torr E. 2.140 torr
If nacl solution is prepared by dissolving 90.0 g nacl in 250.0 g of water at 25°c. The vapor pressure of the solution if the vapor pressure of water at 25°c is 23.56 torr . the closest is option A. 21.21 torr
To calculate the vapor pressure of the solution, we need to use Raoult's law, which states that the vapor pressure of a solution is proportional to the mole fraction of the solvent in the solution. The equation for Raoult's law is:
P = X_solvent * P°_solvent
where:
P is the vapor pressure of the solution,
X_solvent is the mole fraction of the solvent (in this case, water),
P°_solvent is the vapor pressure of the pure solvent (in this case, water).
We can first calculate the mole fraction of water in the solution as follows:
Moles of water = mass of water / molar mass of water
= 250.0 g / 18.015 g/mol
= 13.87 mol
Moles of NaCl = mass of NaCl / molar mass of NaCl
= 90.0 g / 58.44 g/mol
= 1.539 mol
Total moles = moles of water + moles of NaCl
= 13.87 mol + 1.539 mol
= 15.41 mol
The mole fraction of water is then:
X_water = moles of water / total moles
= 13.87 mol / 15.41 mol
= 0.899
Using Raoult's law and the given vapor pressure of water at 25°C (P°_water = 23.56 torr), we can calculate the vapor pressure of the solution as:
P = X_water * P°_water
= 0.899 * 23.56 torr
= 21.14 torr
Therefore, the vapor pressure of the solution is 21.14 torr, which is closest to option A, 21.21 torr.
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Tick the substance that is not a covalent structure
Silicon dioxide
Methane
Sodium Chloride
Carbon Monoxide
Sodium chloride is a compound which does not have a covalent structure.
What is a compound?
Compound is defined as a chemical substance made up of identical molecules containing atoms from more than one type of chemical element.
Molecule consisting atoms of only one element is not called compound.It is transformed into new substances during chemical reactions. There are four major types of compounds depending on chemical bonding present in them.They are:
1)Molecular compounds where in atoms are joined by covalent bonds.
2) ionic compounds where atoms are joined by ionic bond.
3)Inter-metallic compounds where atoms are held by metallic bonds
4) co-ordination complexes where atoms are held by co-ordinate bonds.
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what is organic chemistry excess reactant ?
An excess reactant is a reactant that is present in a greater amount than is required to completely react with the other reactants.
Organic chemistry is the study of chemical compounds that contain carbon. It is a branch of chemistry that focuses on the structure, properties, and reactions of organic molecules.
An organic molecule is a molecule that contains carbon atoms bonded to hydrogen atoms, along with other elements such as oxygen, nitrogen, and sulfur. Organic chemistry is important in many fields, including medicine, agriculture, and materials science.
In a chemical reaction, a reactant is a substance that is consumed in the reaction to form the products. This means that there will be some of the excess reactant left over after the reaction is complete. The amount of product formed in a reaction is determined by the amount of the limiting reactant, which is the reactant that is consumed completely in the reaction.
Therefore, it is important to know the amount of excess reactant in a reaction in order to predict the amount of product that will be formed.
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What type of bond is present in BCl3?
BCl₃ has covalent bonds.
BCl₃ is a compound composed of one boron atom and three chlorine atoms. In this molecule, each atom shares electrons with the other atoms to form covalent bonds. A covalent bond is a type of chemical bond formed by the sharing of electrons between two or more atoms.
In BCl3, the boron atom shares three of its valence electrons with three chlorine atoms, forming three covalent bonds. Each chlorine atom shares one of its valence electrons with the boron atom, completing the octet and forming a stable molecule. Therefore, BCl₃ is a covalent molecule with covalent bonds between boron and chlorine atoms.
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Each different signal in a 1H NMR spectrum represents a different__________of hydrogen atom. Hydrogen atoms that are_______________give the same signal.
One type of hydrogen atom is represented by each distinct signal in a 1-H NMR spectrum. The signal is the same for equivalent hydrogen atoms.
In physics, a spectrum is a distribution of some physical quantity as a function of a variable, such as frequency, wavelength, or energy. The term "spectrum" is commonly used to describe the range of colors of visible light, which is known as the visible spectrum and includes all the colors of the rainbow. However, spectra can also refer to other forms of radiation, such as the electromagnetic spectrum, which includes radio waves, microwaves, infrared radiation, ultraviolet radiation, X-rays, and gamma rays. Spectra can be used to identify and study the properties of matter, such as the chemical composition of a substance, the temperature of a hot object, or the motion of a distant star. Spectroscopy is the scientific field that deals with the analysis of spectra and are widely used in many areas of science and technology.
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Determine the number of moles of kf contained in 347 g of water in a 0. 175 mol kg-1 kf solution.
In a 0. 175 mol kg-1 kf solution, 347 g of water contains 6.07 x 10-2 moles of kf.
What is the definition of "molality"?
Its molality (m), often called molal concentration, is the amount of a substance dissolved in a mass of solvent. It is defined as the moles of a solute per kilogramme of a solvent. The term "molarity," which describes the molar concentration of a solution, is the root of the word "molality."
The mole is the volume of a system that contains 0.012 kilos of carbon 12 and the same number of atoms as there are elementary particles.
Water, m1, has a mass of 347g.
M's molality is 0.175 mol/kg.
Since 1 ml of water has a mass of 1 gramme, 347 g of water is equivalent to 347 ml, or 0.347 L.
As a result, KF is equal to 0.17 * 0.347, or 6.07 x 10-2.
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6. How many grams of CO₂ will be formed in a reaction that should produce 1600 grams but proceeds with a 87% yield?
If the reaction has a 87% yield, then it will produce 1392 grams of CO₂.
What are limiting reactants?The limiting reactant, also known as the limiting reagent, is a substance in a chemical reaction that is fully consumed before the other reactants and determines the maximum amount of product that can be formed. In a reaction mixture, the limiting reactant is the one that runs out first and therefore limits the amount of product that can be formed.
The amount of limiting reactant in a reaction determines the amount of product that can be formed, and the amount of other reactants will be left over. If the reaction yields 87%, it will generate 1600 x 87% = 1392 grams of CO2.
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With respect to earths climate system at the proposed strategy of dimming the sun would be an example of which of the following A) tipping point B) climate, forcing C) greenhouse effect D) earths energy budget
With respect to earths climate system at the proposed strategy of dimming the sun would be an example of climate forcing.
What is climate?Climate is the long-term weather pattern in a region, typically averaged over 30 years. More rigorously, it is the mean and variability of meteorological variables over a time spanning from months to millions of years.
Some of the meteorological variables that are commonly measured are temperature, humidity, atmospheric pressure, wind, and precipitation. In a broader sense, climate is the state of the components of the climate system, including the atmosphere, hydrosphere, cryosphere, lithosphere and biosphere and the interactions between them. The climate of a location is affected by its latitude, longitude, terrain, altitude, land use and nearby water bodies and their currents.
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What does chapter 9 of Great Gatsby symbolize?
The Great Gatsby symbolize the hope, optimism, and the dreams. The green light is the prominent symbol of the hope in The Great Gatsby.
The Great Gatsby hope, the optimism, and the dreams. The green light is the prominent symbol of the hope in The Great Gatsby. When the Gatsby first met the Daisy, he was noticed that the green light that was in the dock by the her house. The green light is the symbol of the hope.
The Nick connects the Gatsby's American Dream of the winning Daisy's that love to the American Dream of the first of the settlers coming to the America.
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A pipet is used to measure out 10 mL of water. If the mass of this volume of water is 9.990 g and the density of water is given as 0.9978 g/mL, what is the actual volume of water measured out? a. 10.000 mL b. 9.990 mL Oc.The actual volume measured out is impossible to tell d. 10.012 mL
The actual volume of water measured out is 10.012 mL.
To determine the actual volume of water, we can use the density formula: density = mass/volume.
Rearranging the formula to solve for volume, we get: volume = mass/density.
Plugging in the given values, we get:
volume = 9.990 g / 0.9978 g/mL = 10.012 mL.
Therefore, the actual volume measured out is slightly greater than the nominal volume of 10 mL, likely due to the meniscus formed by the water at the top of the pipet. This highlights the importance of proper measurement techniques and accounting for sources of error in experimental measurements.
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This is a tiny unit of an element that retains the properties of the element is called?
The tiny unit of an element that retains the properties of the element is called an "atom".
An atom is the basic unit of matter that retains the chemical properties of an element. It is the smallest particle of an element that can participate in a chemical reaction. Atoms are composed of a positively charged nucleus made up of protons and neutrons, surrounded by negatively charged electrons in shells or orbitals.
The number of protons in an atom's nucleus determines its atomic number and thus its identity as a particular element. Atoms can combine with other atoms to form molecules through chemical bonds.
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How do you find the molecular weight of HCl?
Hydrogen chloride HCl has a molecular weight of 36.458.
HCl has a molecular weight of 1.008 plus 35.45.
To find the molecular weight of HCl (hydrogen chloride), you need to know the atomic masses of hydrogen (H) and chlorine (Cl), and then sum them up according to the chemical formula of HCl.
The atomic mass of hydrogen is approximately 1.008, and the atomic mass of chlorine is approximately 35.45. The molecular formula of HCl is H1Cl1, which means it contains one atom of hydrogen and one atom of chlorine.
To find the molecular weight of HCl, you can add the atomic masses of hydrogen and chlorine:
1) Molecular weight of HCl = Atomic mass of hydrogen + Atomic mass of chlorine
2) Molecular weight of HCl = 1.008 + 35.45
3) Molecular weight of HCl = 36.458
The molecular weight of HCl is approximately 36.458 g/mol.
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When drawing a Fischer projection of a sugar, what is placed at the top of the vertical line?
O the –H group
O the –OH group
O a double horizontal line
O the aldehyde group
When drawing a Fischer projection of a sugar, the aldehyde or ketone functional group is usually placed at the top of the vertical line. This is because Fischer projections are usually drawn for carbohydrates in their open-chain form, which contains a carbonyl group (aldehyde or ketone). The aldehyde or ketone group is placed at the top of the vertical line, and the carbon chain is then drawn extending downwards.
If the sugar is a aldose (a sugar with an aldehyde group), the aldehyde group is placed at the top of the vertical line. If it is a ketose (a sugar with a ketone group), the ketone group is placed at the top of the vertical line. The hydroxyl groups (-OH) are then placed on the horizontal lines, either projecting towards or away from the viewer, depending on their stereochemistry.
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