Magnesium and oxygen form magnesium oxide as a result of another instance of ionic bonding.
Describe magnesium oxide.Magnesium oxide is a type of the mineral that is frequently consumed as a dietary supplement. Although it has a lesser absorption than that of other forms of magnesium, it might nevertheless be advantageous. Constipation and migraines are its two main uses. In some groups, it might also aid in lowering anxiety, blood sugar, and blood pressure.
What use does magnesium oxide serve?Different applications for magnesium oxide exist. As an antacid, some people take it to treat acid indigestion, sour stomach, and heartburn. In order to quickly and temporarily clear the bowels, magnesium oxide may also be used as a laxative (before surgery, for example). Use of it frequently is not advised.
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What happens on an atomic level when a reaction between two elements such as sodium and chlorine results in two oppositely charged ions?.
When a reaction between two elements such as sodium and chlorine results in two oppositely charged ions on an atomic level, they combine to form an ionic compound where sodium looses its one electron and chlorine gains that one electron.
How do elements result in oppositely charged ions?Electrons are lost and gained when ionic bonding occurs. This includes an attraction between positively and negatively charged ions to form ionic networks and are called ionic compounds.
The atoms losing one or more electrons becomes a positively charged ion called cation while the gained electrons become negatively charged ions called anion.
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fluoride is a good example of how solvent identity can affect nucleophilicity because fluoride is a nucleophile in a polar protic solvent but a nucleophile in a polar aprotic solvent.
The fluoride ion is frequently utilized in organic nucleophilic processes as both a nucleophile and a leaving group, particularly in arene chemistry.
What is Nucleophilicity ?A functional group within another molecule that lacks electrons is replaced by an electron-rich chemical species in a chemical reaction known as a nucleophilic substitution. The substrate is the molecule that consists of the electrophile and the leaving functional group.
An important family of reactions that enable the interconversion of functional groups is nucleophilic substitution reactions. By using the tosylates (R-OTs), a different way of converting the -OH to a better leaving group, the variety of substitution reactions that are conceivable for alcohols can be expanded.
Why Fluoride is a nucleophile ?In polar protic fluids, the fluoride ion F is typically not a nucleophilic species. It is an extremely potent H-bond acceptor because it is the smallest single anion with the biggest negative charge. Its poor polarizability and these characteristics make it a weak nucleophilic species in protic liquids.
You don't interact with the solvent as much while you're in an aprotic solvent. Finally, fluoride is actually the best nucleophile in this circumstance, followed by chloride, bromide, then iodide. So you're moving toward simplicity in this situation.
Since fluorine is the smallest atom and atom size is more important than electronegativity when evaluating the stability of atoms in the same column, fluorine is the most nucleophilic element in polar aprotic solvent. Being the smallest, although being the most electronegative, it is also the least stable and most nucleophilic.
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based on this value and the standard enthalpies of c2h2 formation for the other substances, the standard enthalpy of formation of is kj/mol.
According to the given statement is Standard C2H2 formation enthalpy is +224 kJ/mole.
Enthalpy can be either good or negative:As a result, an exothermic reaction takes place, and if it releases more energy than it absorbs, its enthalpy will be negative. Think of this as a portion of the reaction's heat evaporating (or being eliminated). Because endothermic reactions take or utilize more energy than they generate, they have positive enthalpies.
What is an enthalpy unit?Enthalpy is a characteristic or state variable which mirrors energy; it shares energy's dimensions and is quantified in joules and ergs as a result. Enthalpy's value is purely influenced by a system's composition, environment, and physical properties—not by its past.
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Arsenic stops the krebs cycle working. Predict what will happen to the concentration of pyruvate, nadh and h+ when the krebs cycle is stopped by arsenic.
vapour pressure easily measured chemical volality
volality is work by a substances vapour pressure.
Evaporation is a unit operation .
Substance with higher vapour pressure will vaporizer more readily at a given temperature than substances with lower vapour pressure.
Substance with higher vapour pressure will vaporizer more readily at a given temperature than substances with lower vapour pressure.
It is more used by chemist and scientists to know about the chemical concentration in the air .
It is more used by chemist and scientists to know about the chemical concentration in the air .
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for each mole of glucose (c6h12o6) oxidized by cellular respiration, how many moles of co2 are released in the citric acid cycle
For every mole of glucose (C6H12O6) that is metabolized by cellular respiration, this citric acid cycle releases 4 moles of CO2.
What is respiration in human biology?Through respiration, which involves consuming oxygen and exhaling carbon dioxide, living beings generate energy. Respiration is a substantial and crucial gas exchange mechanism, it follows. The carbon and oxygen used in breathing are transported via the blood.
What is respiration and types?The phrase "respiratory system" actually is the process by which food is metabolized to produce energy. Both aerobic and anaerobic respiration are the two types. Aerobic respiration is defined as respiratory that takes place while there is air containing oxygen.
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Check the box that has a false statement.
A. The particle at point "A" are locked into place and can only vibrate.
B. At point "B" on the graph, the substance is undergoing a change in state
C. At point 'D' on the graph, the substance is completely transformed to a gas.
D. At point "E" on the graph, the particles of the substance have more energy than at
points "A" or "C".
The particle at point "A" are locked into place and can only vibrate. and At point 'D' on the graph, the substance is completely transformed to a gas. is correct option.
What is vibration?
A mechanical phenomenon called vibration causes oscillations to take place around an equilibrium point. The word is derived from vibrationem in Latin ("shaking, brandishing"). The oscillations can be random—like a tyre rolling over gravel—or periodic, like the swinging of a pendulum. Vibrations like those made by a tuning fork, a woodwind instrument's or harmonica's reed, a mobile phone, or a loudspeaker's cone can be pleasing to the ear. However, vibration is frequently undesirable as it wastes energy and produces unwelcome sound. For instance, the vibrational motions produced by running engines, electric motors, or other mechanical device are typically undesirable. Unbalances in the rotating components, uneven friction, or gear teeth meshing could all be to blame for these vibrations.
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all of the following are cofactors used in the reaction catalyzed by pyruvate dehydrogenase except .
Thiamine pyrophosphate is not the cofactor used in the reaction catalyzed by pyruvate dehydrogenase.
An essential regulatory enzyme known as pyruvate dehydrogenase (PDH) bridges the aerobic TCA cycle to anaerobic glycolysis by catalyzing the conversion of pyruvate into acetyl-CoA.
The citric acid cycle and subsequent oxidative phosphorylation are linked to the glycolysis, gluconeogenesis, and lipid and amino acid metabolism pathways by the pyruvate dehydrogenase complex (PDH).
Three catalytic enzymes, two regulatory enzymes, and a binding protein are all present in PDC. Additionally, TPP, lipoic acid, and flavin adenine dinucleotide are necessary cofactors (FAD).
Pyruvate dehydrogenase does not require thiamine pyrophosphate as a cofactor. It works with living systems. Coenzyme called thiamine pyrophosphate is involved in the metabolism of lipids, amino acids, and carbohydrates.
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Which statement concerning the interaction between two atoms is incorrect?
a. If two atoms are widely separated, there is very little attraction between them.
b. When two atoms are one bond length apart, the electrons on one atom are attracted to the
nucleus of the other atom.
c. When two atoms have very little separation between them, repulsion occurs.
d. A covalent bond occurs when electrons are shared between two nuclei.
e. As atoms get closer together, their electrons attract each other.
Statement which is incorrect concerning interaction between two atoms is that as atoms get closer together, their electrons attract each other.
What is an atom?An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.
The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.
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If 87. 5 percent of a sample of pure 131i decays in 24 days, what is the half-life of 131i?.
If 87. 5 percent of a sample of pure 131 I decays in 24 days, what is the half-life of 131 i is 8 days.
The rate constant expression is given as :
k = 2.303 / t log a / a-x
where, t = 24 days
a = 100
a-x = 100 - 87.5 = 12.5 g
k = 2.303 / 24 log 100 / 12.5
k = 0.0866/ day
now, the t1/2 , half life is given as :
k = 0.693 / t1/2
t1/2 = 0.693 / 0.0866
t1/2 = 8 days.
Thus, If 87. 5 percent of a sample of pure 131 I decays in 24 days, then the half-life of 131 i is 8 days.
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Calculate the freezing point of a solution of 40.0 g methyl salicylate, c7h6o2, dissolved in 800. g of benzene, c6h6. kf for benzene is 5.10°c/m and the freezing point is 5.50°c for benzene.
The freezing point of a solution of 40.0 g methyl salicylate, C₇H₆O₂, dissolved in 800. g of benzene, C₆H₆ is 3.49°C
Since the problem statement gives the solution, the solute in the solution affects some of the properties of the whole system. These properties are called collective properties. To calculate the freezing point of a solution, use the freezing point depression equation expressed as:
ΔT = kf(m)i
where ΔTf represents the freezing point depression, kf is the constant for benzene, 4.90 C/m, i is the Van't Hoff coefficient, which is 1 because certain solutes do not dissociate into ions, and m is the molarity of the solution. Calculate as follows:
ΔT = kf(m)i
ΔT = 4.90 (40.00 / 0.800 (122.13)) (1)
ΔT = 2.01°C
ΔT = T - Tfs
Tfs = 5.5 - 2.01
Tfs = 3.49°C
Therefore, The freezing point of a solution of 40.0 g methyl salicylate, C₇H₆O₂, dissolved in 800 g of benzene, C₆H₆ is 3.49°C
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67 g cacl2 is dissolved in water to generate a 0. 50 m solution. What is the volume of the solution, in liters?
Divide the number of moles by the molarity in units of moles per liter to get the volume of a solution in liters given the number of moles and molarity.
How much volume does a solution have?Given that a solution consists of both a solute and a solvent, its total volume is equal to the sum of the volumes of both the solute and the solvent it contains.
Given the number of moles and molarity, get the volume of a solution in liters by dividing the number of moles by the molarity in units of moles per liter. A solution with 6.0 moles and a molarity of 3.0 moles per liter, for instance, has a volume of 2.0 moles per liter.
The following is the formula to determine a solution's percent volume/volume:
%U/v. Volume of solute/Volume of solution * 100
Determine the required percent v/v
0. 50 m /67 * 100
=7.462
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Answer:1.2L
Explanation:The Correct Answer
consider the lewis structure for ammonia, nh3. what is the hybridization of the n atom, and how many unhybridized p orbitals remain?
Nitrogen's steric number will be equal to 4 because it makes 3 covalent bonds and has 1 lone pair. This means that one s and three p-orbitals will combine to generate a total of 4 hybridized orbitals.
What is steric number?Steric number is defined as both the total number of lone pairs attached and the total number of atoms that are directly bound to a central metal atom.
Steric Number = (number of lone electron pairs ) + (number of atoms bonded to the central atom)
Ammonia is sp3 hybridized. Four hybrid nitrogen orbitals are created when a 2s orbital and three 2p orbitals join.
Thus, nitrogen's steric number will be equal to 4 because it makes 3 covalent bonds and has 1 lone pair. This means that one s and three p-orbitals will combine to generate a total of 4 hybridized orbitals.
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in n2o, nitrogen is the central atom and the oxygen atom is terminal. in of2, however, oxygen is the central atom. use formal charges to explain why.
In N2O, nitrogen is the central atom and the oxygen atom is terminal. in OF2, however, oxygen is the central atom O being in center gives 0 formal charges to all atoms. Hence, the structure is stable.
If it has two bonds and two lone pairs, as in case of water, it will have a formal charge of zero. If it has one bond and three lone pairs, as in case of hydroxide ion, it will have a formal charge of 1−. If it has three bonds and one lone pair, as in case hydronium ion, it will have a formal charge of 1+.
For N2O, N has 5 valence electrons, O has 6 valence electrons. Total valence electrons are 16.
The formal charge here can be calculated as:
Formal charge = valence electron in neutral atom - 1/2 (number of bond pairs - number of lone pairs)
FC (terminal N) = 5 - 1/2 (6-2) ⇒ 0
FC (central O) = 5 - 1/2 (8-0) ⇒ +1
FC (O) = 6 - 1/2(2-6) ⇒ -1
This means structure I is more stable as it has negative charge on O, which is more electronegative.
For OF2, O has 6 valence electrons, F has 7 valence electrons. Total valence electrons are 20. The possible structure is:
FC (F) = 7 - 1/2 (2-6) ⇒ 0
FC (O) = 6 - 1/2 (4-4) ⇒ 0
So, O being in center gives 0 formal charges to all atoms. Hence, the structure is stable.
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which of the following is an easy and sustainable way for campuses to reduce waste? which of the following is an easy and sustainable way for campuses to reduce waste? canals for dumping waste incinerators for garbage outsource to companies that specialize in recycling recycling bins
The easy and sustainable way for campuses to reduce waste is recycle bin.
A recycling bin is a container used to store recyclables before they are transported to recycling facilities. There are recycling bins of various sizes that may be used inside and outside of residences, workplaces, and huge public buildings.The recycling bin's function is to gather items that would have gone to landfills. To create new objects, these items are frequently processed again. You may put a variety of items in a recycling container. Papers, metal scraps, periodicals made of plastic, old gadgets, and a lot more can be added.Businesses may use different colors for different kinds of trash and recycling containers, however these are the most often seen colors: PAPER AND CARDBOARD: BLUE. Glass bottles and jars are green. RED: Containers and packing made of plastic.Thus the correct answer is recycling bins.
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Which characteristics determine an elements?.
The atomic number and the number the protons in an atom are the two characteristics that can be utilised to identify an element. Although it can vary depending just on atom in question.
What called elements?An element is a compound that cannot be changed into another substance. The roughly 100 elements each have a different type of atom. Every object in the universe has atoms out of at least one element and maybe more. The periodic table contains a list of every known element, with similar elements being grouped together.
Who invented the element?Russian chemist Dmitri Mendeleev created the framework for the modern periodic table in 1869, leaving blank spots for elements that were yet to be identified. He organised the elements into groups based on its atomic weight, rearranging them if he found that they simply does not fit.
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the citric acid cycle is activated in the presence of oxygen (o2), but what is the link between the citric acid cycle and o2?
Citric acid cycle uses free oxygen as the final electron acceptor.O2 is an allosteric activator for citrate synthesis.
The citric acid cycle is a series of chemical reactions that removes high-energy electrons and uses them in the electron transport chain to generate ATP. The presence of O2 in mitochondria releases CO2 into cytosol. One molecule of ATP is produced per each turn of the cycle. The electron transport chain is the portion of aerobic respiration that uses free oxygen as the final electron acceptor for electrons removed from the intermediate compounds in glucose catabolism. The electrons are passed through a series of chemical reactions with a small amount of free energy used at three points to transport hydrogen ions across the membrane. This contributes to the gradient used in chemiosmosis. As the electrons are passed from NADH or FADH2 down the electron transport chain, they lose energy. The products of the electron transport chain are water and ATP. A number of intermediate compounds can be diverted into the anabolism of other biochemical molecules. such as nucleic acids, non-essential amino acids, sugars, and lipids. These same molecules except nucleic acids can serve as energy sources for the glucose pathway.
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which of the alkenes above is the least stable (highest in energy)? a which is the most stable (lowest in energy)?
The alkenes mentioned above are in order of decreasing stability and increasing energy with Stability the most secure (lowest in energy).
Why is alkene important?Alkenes have a variety of uses in manufacturing. They serve as the raw ingredients for the synthesis of alcohols, polymers, lacquers, detergents, and fuels. Acetylene, propene, and 1,3-butadiene are the three most significant alkenes for the chemical industry.
How alkenes are formed?Elimination processes, which remove two atoms from adjacent carbon atoms to create a double bond, are typically used to create alkenes. Dehydration of alcohols, dehydrohalogenation of halides, and dehalogenation of alkanes are all steps in the preparation process.
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a student is asked to make 100 ml of 0.196 m kcl solution. how many ml of 0.585 m kcl is needed to make the 0.196 m kcl solution?
3.36ml volume of of 0.585 m KCL solution is needed to make 0.196m kcl solution.
Molarity is a measure of the concentration of a chemical species, in particular of a solute in a solution in terms of amount of substance per unit volume of solution. The unit for molarity is the number of moles per liter. It has the unit symbol mole/l.
here, 100ml of 0.196m Kcl solution made. Moles of the solution is given by the expression,
Moles = Molarity . volume (in liter)
Moles in 100ml 0.196 m Kcl solution= Molarity . volume in liter
= 0.196 . 0.1
= 0.0196 mole
We know that 1ml is equal to 0.001L. By converting this value and put it in the expression we get the value of mole.
Volume= moles/molarity
Volume of the 0.585m KCl solution = moles /molarity
= 0.0196/0.585 L
=0.033504 L= 3.3504 ml
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compare solution a and solution b in each label and drag the label to the appropriate concentration description.
olution A = 0.5mM and Solution B = 100mm
Solution A = 2 mM of n+3 and Solution B = 1 M n+1
Solution A = 3.5mg/dL and Solution B = 3.7mg/dL
Solution A = 0% (w/v) and Solution B = 0% (w/v)
Solution A = 10-3 M and Solution B = 10-5M
Solution A = 12.23% (w/v) and Solution B = 12.3% (w/v)
Substance A is more conentrated than B
Equal concentrations
Substance B is more concentrated than A
A) Solution B of 100 mM is more concentrated than Solution A of 0.5 mM.
B) Solution B of 3.7mg/dL is more concentrated than Solution A of 3.5mg/dL.
C) Solution A = 0% (w/v) and Solution B = 0% (w/v) equal concentrations.
D) Solution A of 10⁻³ M is more concentrated than Solution A of 10⁻⁵M.
E) Solution B of 12.3% (w/v) is more concentrated than Solution A of 12.23% (w/v)
What is concentration?In chemistry, concentration can be described as the abundance of components divided by the total volume of a solution. Several kinds of mathematical descriptions can be distinguished: mass concentration, number concentration, molar concentration, and volume concentration.
The concentration is defined as the kind of chemical mixture, but most frequently refers to solutes and solvents in solutions. The molar concentration has variants, such as osmotic concentration and normal concentration.
Molarity, molality, Normality, and weight/ volume percentage are also used to define the concentration of the solution.
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which is the correct ksp expression for cr(oh)3(s) dissolving in water? which is the correct ksp expression for cr(oh)3(s) dissolving in water? ksp
The correct ksp expression for Cr(OH)₃(s) dissolving in water is ksp = [ Cr³⁺] [ OH⁻ ]³.
The ksp is called as the solubility product constant. The solubility product constant is the equilibrium constant for the solid substances that is dissolve the aqueous solution. the symbol for the solubility product constant is given as : ksp.
The equation for the Cr(OH)₃ is given as :
Cr(OH)₃ ⇄ Cr³⁺ + 3OH⁻
The ksp expression is given as :
ksp = [ Cr³⁺] [ OH⁻ ]³
Thus, The correct ksp expression for Cr(OH)₃(s) dissolving in water is ksp = [ Cr³⁺] [ OH⁻ ]³.
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at what temperature will a sample of neon gas exert a pressure of 0.750 atm and exhibit a density of 1.45 gl?
A sample of neon gas exert a pressure of 0.750 atm and exhibit a density of 1.45 g/L wil have temperature at 63°K
temperature of sample of neon gas exert a pressure of 0.750 atm and exhibit a density of 1.45 g/L can be calculate as follows
Calculating the temperature if we knew the density of a gas usually involves combining the formula for density (mass divided by volume) and the ideal gas law (PV = nRT).
ρ = PM/RT, where M is molar mass, mollar mas of neon is 10
from this formula we can conclude
T = PM/ ρR
T = 0.750 atm x 10 g/ mol
1.45 g/L x 0.0821 L·atm/mol·K
T = 63°K
Therefore, a sample of neon gas exert a pressure of 0.750 atm and exhibit a density of 1.45 g/L wil have temperature at 63°K
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look at each of the atoms in the solid state. What similarities do you see in the solids
If the proportions of the corresponding sides and angles of two shapes or solids match, then the forms or solids are said to be comparable. Keep in mind that expanding a form results in a comparable shape.
What is solid ?One of the four basic states of matter is solid. The least energetic molecules are those that are tightly packed together and make up solids. A solid's structural stiffness and resistance to surface forces are its defining characteristics.
Because the energy of atoms lowers when they occupy a reasonably organized, three-dimensional structure, a solid develops from a liquid or gas. Solids differ from liquids and gases in that they have particular properties.
Thus, If the ratio of the lengths of the respective radii, heights, base lengths, widths, or any other dimensions of two solids is the same, they are said to be comparable.
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What metaphor does Hamlet use in his To be or not to be speech?.
In an allegory, Hamlet describes the world as "an un-weeded garden," drawing attention to the source of their melancholy.
Simile to compare this same world to a garden where weeds had taken over as well as begun to multiply. In such a double metaphor, Polo.nius refers to Ophelia as a baby, implying that she was naïve to believe Hamlet's affections ("tenders") toward her are genuine whereas they are,, throughout fact, counterfeit silver coins.
Hamlet considers de.ath versus su.icide, comparing the mis ery and harsh ness of life even against possibility of a worse option.
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enter your answer in the provided box. how many milliliters of 1.16 m naoh must be added to 175 ml of 0.20 m nah2po4 to make a buffer solution with a ph of 7.30? ml
The volume of the Naoh that is required was =4.074
What is the use of the buffer solution ?
A buffer is an aqueous solution made up of a weak acid and its salt (acid buffer) or a weak base and its salt (base buffer) (basic buffer). When a small amount of strong acid or base is added to it, its pH changes very little, and it is thus used to prevent the pH of a solution from changing.
Buffer solutions are utilised in several chemical applications. Blood is one example of a natural buffer solution. The natural pH of human blood is 7.4. Many people suffer from severe anxiety and alkalosis. Alkalosis is a condition in which the blood pH is abnormally high. The opposite situation is known as acidosis, which occurs when the pH of the blood exceeds 7.4.
naoh+nah2po4 ------------> h2o+na3po4
pka=3.39
7.30=3.39+(log(h2o/naoh)
log(h2o/naoh)=7.30-3.39
=3.91
=10^log(h2o/naoh)=10^3.91
=4.074
The volume required was=4.074
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mcpba draw one of the two diasteromers of the major product from this reaction use wedge and dash bonds to indicate sterochemistry where appropriate ignore inorganic byproducts
A molecule's three-dimensional structure, with simple lines representing plane links, wedge-shaped lines representing bonds facing the observer, and dashed lines representing bonds Stereochemistry facing the viewer's opposite.
Stereochemistry is the study of a molecule's three-dimensional structure. The only structural difference between cis and trans isomers, which are types of stereoisomers, is where the molecule's elements are located three dimensionally. The chemical and physical properties of these stereoisomers may differ. Stereochemistry is a branch of chemistry concerned with "the study of the various spatial configurations of atoms in molecules." The systematic presentation of a specific area of science and technology, known as
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some reactions used during glycolysis produce atp and others use atp. match the enzymes on the left with the reaction types they catalyze on the right.
Both phosphofructokinase kinase and dehydrogenase kinase catalyze events that result in the production of ATP during the phases of glycolysis as glucose is transformed into lactate or ethanol.
What is the process of glycolysis?Describe glycolysis. The process by which sugar is burned down to provide energy is known as glycolysis. It generates two pyruvate molecules, ATP, NADH, and water. There is no need for oxygen throughout the process, which occurs inside the cytoplasm of each cell. Both anaerobic and aerobic creatures experience it.
What are the primary roles that glycolysis plays?The first stage of cellular respiration is it. In glycolysis, sugar molecules are disassembled to produce the energy needed for cellular metabolism. It takes place in the cell's cytoplasm. The primary objective of metabolism is to create hundreds
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A cold pack manufacturer has decided to change the chemical in its cold pack from ammonium nitrate to ammonium chloride. The original cold pack formulation used 100.0 g of room temperature (27.0 degrees Celsius) water and 35 g of ammonium nitrate. Assume that the solution has the same density and specific heat capacity as water and that any heat lost to the calorimeter is negligible. The molar enthalpy of solution for ammonium nitrate is 25.7 kJ/mol and for ammonium chloride is 14.8 kJ/mol.
a. Determine the lowest temperature reached using the original formulation.
b. Calculate the quantity of ammonium chloride needed to reach the same temperature.
The mass of ammonium chloride that will be needed is 27 g.
The number of moles of ammonium nitrate in 35 g is,
n = 35 g / 80.044 g/mol
⇒ n = 0.45 mol
The change in enthalpy caused by the reaction of ammonium nitrate in water is,
ΔH = n × ΔHₓₙ
⇒ ΔH = 0.45 mol × 15.7 kJ/mol
⇒ΔH = 7.1 kJ
The number of moles of ammonium chloride required to change in enthalpy of 7.1 kJ is,
n = ΔH / ΔHₓₙ
⇒ n = 7.1 kJ / 14.8 kJ mol⁻¹
⇒ n = 0.48 mol
The molar mass of ammonium chloride is 53,49 g/mol. The mass of ammonium chloride is,
m = 0.48 mol × 53.49 g/mol
⇒ m = 27 g
Hence, the mass of ammonium chloride that will be needed is 27 g.
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potassium permanganate, kmno4 , is a powerful oxidizing agent. the products of a given redox reaction with the permanganate ion depend on the reaction conditions used. in basic solution, the following equation represents the reaction of this ion with a solution containing sodium sulfite:
Mn is in the +7 state in KMnO4, which is a potent oxidizing agent. While it will operate as an oxidizing agent in neutral and basic media, there is a change of 5 electrons in acidic media.
The excellent oxidizing agent permanganate Why?The electronegative properties of the elements increase with the oxidation states of the atoms. Permanganate is a good oxidizing agent because of this.
KMnO4 will be utilized as a titrant; what will happen?While gently swirling the solution in the flask, the heated solution is titrated against a solution of potassium permanganate. Oxalic acid initially causes KMnO4 to lose its purple color. The conclusion is revealed by the appearance of permanent pink color.
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organize the steps of the mechanism for acid-catalyzed nucleophilic addition to an aldehyde or ketone in the correct sequence, starting with the first step at the top of the list.
Carbonyl oxygen is protonated, the carbonyl carbon is added with a nucleophile, and the old nucleophile is deprotonated.
What alters your body do ketones have?If mistreated, ketones can harm your body by upsetting the chemical equilibrium of your blood. Your body will attempt to eliminate excess ketones through urine because it cannot handle them. They eventually accumulate in the blood.
Urine is it a ketone?When your cells run out of glucose, your body turns to fat for energy. Ketones, an acid produced as a result, can accumulate in you blood and urine. It's normal to have some ketones throughout your pee. However, excessive quantities of ketone in your urine might indicate because your body is overly acidic.
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the oxygen in the air we breath is classified as: group of answer choices the solute in a heterogeneous gas-liquid mixture. the solute in a homogeneous gas mixture. the solvent in a homogeneous gas mixture. the solvent in a simple mixture. none of the above
The oxygen in the air that we breath is the solute in a hom---ogeneous gas mixture. And this is option C in the question.
What is oxygen?We know that oxygen is part of the gases that are involved in respiration. In the respiration of the animals, animals breath in oxygen and then breath out carbon dioxide. However, the oxygen is only one of the components of the air.
We have to know that air is a mixture of gases thus there are so many gases that compose air we can then say that the air is an example of a hom--ogeneous gas mixture since there are so many gases that are combined here.
Thus, the gas mixture can be seen as solution that does contain a mixture of gases and oxygen is one of those gases that are found in the mixture.
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