The appropriate elements to their respective bins Li----------- He, O,Mg ----------- Ne, S, K ------------Ar,Rb, ------------- Kr
The Li+ ion has 2 electrons, just like He. The ions Mg2+ and O2− each have 10 electrons like Ne. The S2− and K+ each have 18 electrons like Ar. The ions As3− and Rb+ each have 36 electrons like Kr.
What other ions contain as many electrons as a noble gas?
As an illustration, oxygen in Group 16 forms O2 to have the same number of electrons as neon, barium in Group 2 forms Ba2+ to have the same number of electrons as its nearest noble gas, xenon, cesium in Group 1 forms Cs+ to have the same number of electrons as xenon.
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Complete question is here:
If the following elements were to form ions, they would attain the same number of electrons as which noble gas Whose the appropriate elements to their respective bins.
As,Li,O,S,k,Mg,Rb
a)He
B)Ne
C)Ar
D)Kr
Is the following sentence true or false? When the temperature of water drops to 0°C, its molecules form regular patterns, which are crystals.
The statement; When the temperature of water drops to 0°C, its molecules form regular patterns, which are crystals is true
What is the crystal structure of ice?
The crystal structure of ice is hexagonal. Ice forms a crystalline lattice structure, with the oxygen atoms of each water molecule bonded to four neighboring oxygen atoms. The hexagonal arrangement of the water molecules in ice results in a highly organized, closely packed arrangement with a low density.
Thus, we know that when we remove heat from water, there is a lining up of the water molecules and this leads to the crystal structure of ice.
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gases behave most ideally at choose... temperatures and choose... pressures.
High temperatures and low pressures
Explanation:Ideal gas is a hypothetical state of gases that allows for easier calculations with gases.
Ideal Gas Assumptions
There are 5 assumptions that scientists make to apply ideal gas laws.
Gases are constantly moving in linear motionThere are no intermolecular forces (IMFs) between gas particlesThe volume of gas particles is negligibleParticles have perfectly elastic collisionsKinetic energy is proportional to temperature.Note that elastic collisions mean that no energy is lost through the collisions of particles. Additionally, very few gases actually follow these assumptions. However, sometimes the variation from these assumptions is small enough that the effects are negligible.
Most Ideal Behavior
Whilst ideal gases are not real, small gas particles at high temperatures and low pressures act mostly ideal. Gases at high temperatures move very quickly; this allows their motion to be mostly linear and for less energy to be lost in collisions.
Also, at low pressures, gas particles are further apart. The increased distance between the gas particles decreases the effect of IMFs, making gases more ideal. Additionally, the ratio of empty space to gas particles is larger when the volume is larger. This means that the volume of the particles is negligible.
Overall, high temperatures and low pressures help gases behave most ideally.
When methanol dissolves in water, what imfs are overcome in the solute?
Answer: it's able to overcome hydrogen bonding, dipole-dipole interactions, and LDFs
Explanation:
a system is in a macrostate compatible with 1.68 x 109 possible microstates. what is the corresponding value of the entropy?
[tex]0.715*10^{-23}[/tex] (0.715*10^(-23))is the corresponding value of the entropy.
Entropy is a measureable physical characteristic and a scientific notion that is frequently connected to a condition of disorder, unpredictability, or uncertainty. From classical thermodynamics, where it was originally identified, through the microscopic description of nature in statistical physics, to the fundamentals of information theory, the phrase and idea are utilised in a variety of disciplines.It has several applications in physics and chemistry, biological systems and how they relate to life, cosmology, economics, sociology, weather science, and information systems, especially the exchange of information.
[tex]S=kB ln W[/tex]
kB=Boltzmann constant
[tex]kB=1.38*10^{-23}[/tex]
W=microstages
[tex]W=1.68 * 10^9[/tex]
[tex]S={1.38*10^{-23}}j/k ln{1.68*10^9}[/tex]
[tex]S=0.715*10^{-23}[/tex]
therefore the corresponding value of the entropy is [tex]0.715*10^{-23}[/tex]
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how many electrons can vanadium lend or borrow
According to the electronic configuration, vanadium can lend three electrons.
What is electronic configuration?
Electronic configuration is defined as the distribution of electrons which are present in an atom or molecule in atomic or molecular orbitals.It describes how each electron moves independently in an orbital.
Knowledge of electronic configuration is necessary for understanding the structure of periodic table.It helps in understanding the chemical properties of elements.
Elements undergo chemical reactions in order to achieve stability. Main group elements obey the octet rule in their electronic configuration while the transition elements follow the 18 electron rule. Noble elements have valence shell complete in ground state and hence are said to be stable.
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separation of proteins in the first dimension of 2d gel electrophoresis is based on a protein’s molecular weight. T/F
The above statement is True.
The first dimension of 2D gel electrophoresis is usually isoelectric focusing, which separates proteins based on their isoelectric point (pI), which is related to their molecular weight.
By using the equation y = mx + b, we may utilize gel electroscopes to calculate the molecular weight of a protein.
DNA fragments are divided using the gel electroscopes method based on their size. By formulating the equation y = mx + b and solving for y, it is possible to determine the Molecular Weight of the unknown protein. Samples and standards are run across the gel using SDS-PAGE. Apply the desired dye to the gel, then de-stain it to reveal the protein bands. Use the Quantity One analytical application to do the calculation graphically or otherwise (or equivalent).
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if the atomic mass for copper on the periodic table is 63.55, are there more atoms of 63/29 cu or 65/29 cu in a sample of copper? there are in a sample of copper because the mass number of copper, which is 63.55 amu , is the mass number of the isotope present in the highest percentage.
Yes, ⁶³₂₉Cu are more atoms them⁶⁵₂₉Cu.
There are more atoms of ⁶³₂₉Cu in a sample of copper because the mass number of copper, which is 63.55 amu is closer to the mass number of an isotope present in the highest percentage.
Copper has two isotopes: Cu-63 = x% and Cu-65 = (100 – x)%
Average mass = (Atomic mass of Cu-63 x %Cu-63) + (Atomic mass of Cu-65 x %Cu-65)
63.55 = (63 x (x%)) + (65 x (100 – x)%
63.55 = 0.63x + 65 – 0.65x
0.02x = 65 – 63.55
0.02x = 1.45
x = 1.45/0.02
x = 72.5
Abundance of Cu-63 = 72.5%
Abundance of Cu-65 = (100 – 72.5)% = 27.5%
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which structural feature most likely accounts for the signals around 7 ppm in the given 1h nmr spectrum
The correct option is B. A disubstituted aromatic ring structural feature most likely accounts for the signals around 7 ppm in the given 1h nmr spectrum.
Nuclear magnetic resonance (NMR) spectroscopy is an advanced characterization approach. it's miles used to decide the molecular structure on the atomic degree of a pattern.it's far based on the reality that the nuclei of most atoms show spin and all nuclei are electrically charged. NMR-spectroscopy is primarily based on the absorption of electromagnetic radiation within the radiofrequency region 3kHz-300 GHz.
NMR spectroscopy is used to decide the structure of proteins, amino acid profile, carotenoids, natural acids, lipid fractions, and the mobility of the water in foods. NMR spectroscopy is likewise used to pick out and quantify the metabolites in ingredients. the dimensions are made greater workable with the aid of expressing it in elements consistent with million (ppm) and are independent of the spectrometer frequency. it's miles frequently convenient to explain the relative positions of the resonances in an NMR spectrum.
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Completed Question:
which structural feature most likely accounts for the signals around 7 ppm in the given 1h nmr spectrum
A). A cis disubstituted alkane.
B). A disubstituted aromatic ring.
C). A monosubstituted alkane.
D). A trans-disubstituted alkane.
E). A monosubstituted aromatic ring.
An electron in an orbital that penetrates closer to the nucleus will always experience more shielding than an electron in an orbital that does not penetrate as far.a. Trueb. False
It is untrue that an electron in an orbital that enters the nucleus more deeply would always be shielded more than an electron in an orbital that penetrates less deeply.
Are electrons that are nearer the nucleus subject to more shielding?Since the valence electrons are further from the nucleus, the force of attraction is weaker for them. By rejecting the outer rings, or shielding, the core electrons reduce the 1:1 ratio.
Which orbital provides the best shielding for an electron?As a result, electrons in a s orbital of the same shell have more shielding power than electrons in a p or d orbital. Additionally, the very penetrating nature of s orbitals makes them less effective at protecting electrons from various orbitals of the electron.
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How many
moles concentrated nitric acid were used? Recall that 5 mL of 16 M HNO3
were used. are used? Concentrated nitric acid is 16.0 M. Show work!
Moles nitric acid =????
Please I need help
Answer:
0.08 moles
Explanation:
The number of moles of nitric acid used can be calculated using the formula:
moles = concentration x volume
where concentration is in moles/liter and volume is in liters.
Since the volume of nitric acid used is given in milliliters (5 mL), we first need to convert it to liters:
5 mL = 5 x 10^-3 L
Now, we can calculate the number of moles of nitric acid used:
moles = 16.0 M x (5 x 10^-3 L) = 0.08 moles
So, 0.08 moles of concentrated nitric acid (16 M) were used.
In the following reaction:
Cu(s) + 4HNO3(aq) Cu(NO3)2(aq) + 2NO₂(g) + 2H₂O
(1) which of the following statements about copper is true?
A Copper undergoes reduction and its oxidation number decreases.
B Copper undergoes oxidation and its oxidation number decreases.
C Copper undergoes reduction and its oxidation number increases.
D Copper undergoes oxidation and its oxidation number increases.
Answer:
Copper undergoes oxidation and its oxidation number increases.
Explanation:
Copper, here, gains an oxygen molecule on the products' side, so it gets oxidized. When oxidized, the oxidizing number increases, so your answer is D.
You mix 2 moles of HBr with 3 moles of KOH in enough water to make 1 L of solution. How much KBr do you expect to make?
a. 2 moles
b. 5 moles
c. 3 moles
d. 1 moles
If two moles of HBr and three moles of KOH are mixed with enough water to make one liter of solution, two moles of KBr are produced. Hence option 'a' is correct.
Write about a mole.A mole is the quantity of a substance made up from 6.022 X 1023 of it's own constituent constituents, including such particle, atoms, ion, molecules, etc. The unit of measurement for atoms, molecules, and ions is called a mole.
According to the chemical reaction between HBr and KOH, which is balanced: HBr + KOH KBr + H2O
As can be seen, 1 mole of HBr reacts with 1 mole of KOH to form 1 mole of KBr. Because of this, when 2 moles of HBr & 3 mole of KOH are mixed, all of the HBr will react whereas only 2 mole of KOH are required. You can expect to produce two mole of KBr as a result.
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which of the following are involved during chemical bonding? a. neutrons b. valence electrons c. beta particles d. alpha particles
b.valence electron
In
chemical
bonding, valence
electrons
play a role.
An element's atomic structure contains
electrons
, which are subatomic particles with a negative charge. They take part in chemical reactions and bonding while revolving around the atom's nucleus. An element's chemical makeup and place in the periodic table are determined by the number of electrons it contains in each
atom
. The movement of electricity in conductors and the operation of electronic equipment are both greatly influenced by electrons. A lot of natural phenomena, like light and heat, are caused by the fact that electrons have the ability to be excited to greater energy levels by
absorbing
energy and by releasing energy when they return to their initial condition. Quantum mechanics and classical mechanics both provide descriptions of the
behaviour
and motion of electrons.
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why is my car overheating but it has coolant in it?
The vehicle is smoking beneath the hood but without overheating because a specific fluid has been put onto the engine.
What do you mean when you say "fluid"?Any kind of liquids, gases, or essentially any other materials that, when stressed, continuously change shape and cannot bear radial or shear forces at rest are considered fluids.
Exactly what do you mean by fluid properties?Some of the most fundamental concepts in fluid properties include thermostat, density, and composition. Mass and volume are examples of extensive characteristics, or properties that depend on the amount of material present. Intense properties include things like temperature, pressure, and density, for instance.
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what is the pressure of a container with 2 moles of gas, a temperature of 500 k, and a volume of 2 l
The pressure of a container with 2 moles of gas, a temperature of 500 k, and a volume of 2 l is 4.1 atm
The pressure, volume, number of moles or molecules, and temperature are all related by this law. In essence, the link between these four separate variables is provided by the ideal gas law. the rule that states that the sum of the absolute temperature of the gas and the universal gas constant is equal to the product of the pressure and volume of a single gram of an ideal gas.
pV = nRT
where
Volume of water V = 2L
Temperature T = 500K
Pressure= P
n= Number of moles of gas = 2 moles
R = 0.0082 atm dm³ K⁻¹mol⁻¹
pV = nRT
P = nRT/V
P = 2 moles 0.0082 atm dm³ K⁻¹mol⁻¹ 500K / 2L
P = 4.1 atm
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when using myplate to plan meals, which food groups should make up half the plate?
Looking at MyPlate, you can quickly see that vegetables and fruits make up half the plate, and grains and protein foods make up about a quarter of the plate each.
The United States Department of Agriculture (USDA) has developed her MyPlate, an easy-to-follow nutrition guide to help parents understand how to feed their children nutritious, balanced meals. Colorfully divided plates contain sections for vegetables, fruits, grains and protein foods. The MyPlate plan is a personalized nutrition plan based on your age, gender, height, weight and physical activity level. This helps you understand how many calories you need each day and shows you your food group goals (what and how much to eat within your caloric intake).
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can a compound be broken down into simpler substances (true or False)
Answer:
True
Explanation:
Compounds are a certain thing made by either 2 or more substances. So if we were to break down a compounds, we would receive at least 2 simpler substances.
-Hope this helped
Explain what happens when solar cells are added to a person’s house and the energy of the sun is greater than the energy needs of the house.
The situation that happens when solar cells are added to a person’s house and the energy of the sun is greater than the energy needs of the house is an excedent of energy that can be received by the system and feed other homes.
What is solar radiation?Solar radiation is a type of renewable source of energy that can be obtained by using solar panels that trap solar energy and then convert it into electricity.
Therefore, with this data, we can see that solar radiation is a clean source of energy that can be sued to feed the public system.
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Describe the cycling of carbon in the carbon cycle.
The carbon cycle is nature's way of recycling carbon atoms that enter organisms on Earth from the atmosphere and return to the atmosphere again and again. Most of the carbon is stored in rocks and sediments, the rest in the ocean, atmosphere and organisms.
The pathways show the use of carbon compounds in various activities and sources due to their natural origin. The main purpose of the cycle is to balance carbon within the ecosystem from biotic and abiotic factors. As carbon passes through biotic and abiotic factors, the following happens:
The process by which plants and other autotrophs produce food requires carbon dioxide as the main component, thus providing the organism with the essential glucose and oxygen.The process of inhaling and exhaling gases from the body is called respiration. Digested food and inhaled oxygen in the organism's body release carbon dioxide into the environment. Dead plants, microorganisms, and animals break down into smaller organic and inorganic compounds, releasing carbon dioxide into the atmosphere and soil.Learn more about Carbon Cycle
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According to the dramatic exposition at the beginning of the play, what fueled the Salem witch hunt depicted in the play?
People who had "wronged" them want revenge and their own brand of justice.
What do you call anyone who is dramatic?Melodramatic is often compared to theatrical, histrionic, and theatrical. Melodramatic conjures up excessive emotionalism or improper theatricalism, even if all these adjectives refer to "has a tone or an impact like that of staged plays."
What causes somebody to be so dramatic?Acting excessively theatrical is a symptom of hysterical personality disorder (HPD). People who have HPD may well have superficial, erratic moods and rely on their outside looks to attract attention. They could also be sensitive to other influences and struggle to develop their own personalities.
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what is the total pressure exerted by a mixture containing two gases if the partial pressure of one gas is 70 torr and the partial pressure of the other gas is 30 torr?
a. 100 torr
b. 40 torr
c. 70 torr
d. 30 torr
If one gas's partial pressure was 70 torr and the second gas's partial pressure is 30 torr, the combined pressure of a two substances in the combination will be 100 torr.
What processes result in gas?Double displacement reactions are the kind of chemical processes that result in the production of a gas. The weak linkages holding all ions together would be broken by the inorganic salts of such reactants during this reaction.
What is the gas process?Carbon dioxide at the same time. This takes place inside the lungs between a network of microscopic blood arteries known as capillaries and the alveoli.
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which of the following is an example of hydrolysis? question 19 options: the reaction of two monosaccharides, forming a disaccharide with the release of water. the synthesis of two amino acids, forming a peptide with the release of water, the reaction of a fat, forming glycerol and fatty acids with the release of water the reaction of a fat, forming glycerol and fatty acids with the utilization of water.
The example of hydrolysis is the reaction of a fat, forming glycerol and fatty acids with the release of water the reaction of a fat, forming glycerol and fatty acids with the utilization of water.
Hydrolysis is described as the reaction that involves the reaction of an organic chemical with water to form two or more new substances and usually means the cleavage of chemical bonds by the addition of water.
In other words, hydrolysis is defined as a common form of a chemical reaction where water is mostly used to break down the chemical bonds that exists between a particular substance. The word 'Hydrolysis' is derived from a Greek word hydro which means water and lysis which translates to the word break or to unbind.
An example of hydrolysis is the reaction of a fat, forming glycerol and fatty acids with the release of water the reaction of a fat, forming glycerol and fatty acids with the utilization of water.
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How many moles of water are produced when 7 moles of hydrogen gas react with 3 moles of oxygen gas?
2H₂O₂->2H2 ,O
O 2 moles of water
O 3 moles of water
O 5 moles of water
O 6 moles of water
5 moles of water is the correct answer
What is mole ?
A mole is a unit of measurement used in chemistry to quantify the amount of a substance. It is defined as the amount of a substance that contains Avogadro's number of entities, which is approximately 6.022 x 10^23 particles. The mole is used to express the amount of a substance in terms of its molecular or atomic count. The mole is particularly useful in chemical reactions, where it is used to balance the number of atoms or molecules of the reactants and products. For example, in a balanced chemical equation, the number of moles of each reactant must be equal to the number of moles of the corresponding product.
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2.26 (a) calculate %ic of the interatomic bonds for the intermetallic compound tial3. (b) on the basis of this result what type of interatomic bonding would you expect to be found in tial3?
The percentage of ionic characters in compounds that have several covalent characters can be calculated by the following equation:
Percent ionic character = observed dipole moment / calculated dipole moment, assuming 100% * 100 ionic bond
The % ionic character is a function of the electronegativity of the XA and XB ions.
The electronegativity of titanium, X[tex]__{Ti}[/tex] = 1.54The electronegativity of aluminum, X[tex]__{Al}[/tex] = 1.61Percentage of ionic character for TiAl₃ ;
%IC = {1-exp [-0.25(X[tex]__{Ti}[/tex] - X[tex]__{Al}[/tex])]} * 100
= {1-exp [-0.25(-0.07)]} * 100
= {1-exp [0.0175)]} * 100
= {1-1.0176} * 100
= {0.176} * 100
= 1.76%
Since the percent ionic character is very small (1.76%), and this intermetallic compound is composed of two metals Al and Ti, the bond is strictly metallic.
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a can of cola contains about 39 grams of sucrose, c12h22o11. how many moles of sucrose does this represent?
Therefore, there are approximately 0.1135 moles of sucrose in a can of cola.
Sucrose, also known as table sugar, has the chemical formula [tex]C_{12}H_{22}O_{11}[/tex]. The molar mass of sucrose can be calculated by adding up the atomic masses of each element in the molecule. Carbon, hydrogen, and oxygen are the main elements in sucrose and each have a unique atomic mass. By multiplying the number of atoms of each element by its atomic mass, we get the total molar mass of the molecule, which is 342.34 g/mol. To find the number of moles of sucrose in a sample, we divide the mass of the sample by its molar mass. In this case, 39 g of sucrose represents 0.1135 moles.
[tex](12*12.01) + (11.16.00) = 342.34 g/mol[/tex]
So the number of moles of sucrose is:
[tex]\frac{39}{342.34} = 0.1135[/tex]
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when 50.08 g of 1.00 m naoh at 23 °c is added to 50.22 g of 1.00 m hcl at 23 °c, the resulting temperature of the mixture is 29.7 °c. is the reaction endothermic or exothermic?
Just after addition of the NaOH and HCl, the mixture's temperature rose form 23 °C to 29.7 °C, showing that the process is exothermic.
What are exothermic and endothermic processes?Exothermic refers to chemical reactions that results in the release. When bonds are generated in the products of exothermic events, more energy is produced than is required the break the bonds between the reagents. Exothermic reaction refers to chemical methods that either utilize or absorb energy.
Is endothermy a positive idea?Heat of reaction is often high in endothermic processes (qrxn>0). Changes in energy levels between exothermic and endothermic events result in variations in enthalpy (H), which is the total of all kinetic and potential energies.
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PLEASE PLEASE HELPPPPPPPPPPPPPP
When a person advertises a product, she is (1 point)
Responses
marketing.
marketing.
communicating.
communicating.
delivering.
delivering.
unloading.
Marketing is the correct answer .
What is Marketing ?
Marketing is the process of creating, communicating, delivering, exchanging, and managing offerings that have value for customers, clients, and society as a whole. It involves identifying the needs and wants of customers and developing products or services to meet those needs. Marketing also involves promoting and selling products or services, as well as managing customer relationships to ensure customer satisfaction and loyalty. Marketing encompasses a wide range of activities, including market research, product development, advertising, sales, pricing, and distribution. It is a strategic function that helps organizations understand and connect with their target audience, and effectively communicate the value of their offerings.
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Which of the following are true about balanced chemical reactions? (Select all that apply)
a.
Atoms of each element are equal on both sides.
b.
All chemical formulas have a coefficient greater than one.
c.
It is better to change subscripts to balance equations.
d.
Coefficients are added to balance the equation.
e.
Chemical equations must be balanced to satisfy the Law of Conservation of Mass.
f.
Balanced chemical equations help to determine the number of moles needed in the reaction.
Balanced chemical equations help to determine the number of moles needed in the reaction. Therefore, the correct options are option A, D, E, F.
What is balanced equation?An equation for a chemical reaction is said to be balanced if both the reactants and the products have the same number of atoms and total charge for each component of the reaction. In other words, opposite components of the reaction have an equal balance of mass and charge.
Atoms of each element are equal on both sides. Coefficients are added to balance the equation. Chemical equations must be balanced to satisfy the Law of Conservation of Mass. Balanced chemical equations help to determine the number of moles needed in the reaction.
Therefore, the correct options are option A, D, E, F.
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Aldehydes have central carbon bound t0 two other carbons true false Question 0.33 pts Carboxylic acids contain carbonyl group ano what other group? Jmine phosphate hydroxyi Question 5 0.33 pts How Men electrons in total can Hydrogen have?
The statement is false that Aldehydes have central carbon bound to two other carbons. Carboxylic acids contain carbonyl group and hydroxyl group. 2 electrons in total hydrogen have.
Why is it referred to as aldehyde?All aldehydes possess a double bond between carbon and oxygen, which is termed to as the carbonyl group. Many aldehydes have pleasant aromas, and in principle, they are made from alcohols by the process of dehydrogenation (removal of hydrogen), which is how the word "aldehyde" originated.
How are carboxylic acids structured?An organic acid that contains a carboxyl group (C(=O)OH) connected to an R-group is termed to as a carboxylic acid in organic chemistry. A carboxylic acid's general formula is RCOOH or RCO 2H, wherein R stands for an alkyl, alkenyl, aryl, or other group. Carboxylic acids are usually present.
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Aldehydes have central carbon bound to two other carbons true/false.
Carboxylic acids contain carbonyl group and what other group?
A)Amine
B)Phosphate
C)hydroxyl
How many electrons in total can Hydrogen have?
A)8
B)2
C)4
D)6
draw all the structures of the isomeric alcohols (c5h12o) that can be prepared by reduction of a ketone using sodium borohydride?
There are three structures possible-
Pentan-1-olPentan-2-olPentan-3-olStructures of Isomeric Alcohols
Here are the structures of the isomeric alcohols (C5H12O) that can be prepared by reduction of a ketone using sodium borohydride:
Pentan-1-ol:
H3C-CH2-CH2-CH2-CH2-OH
Pentan-2-ol:
H3C-CH(OH)-CH2-CH2-CH3
Pentan-3-ol:
H3C-CH2-CH(OH)-CH2-CH3
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