NOT A and C for the following reason: Combustibility and Reactivity are chemical properties since they involve changing one substance into another.
Color, density, hardness, melting and boiling points are examples of physical qualities along with hardness. Matter has a variety of physical characteristics, such as color, hardness, malleability, solubility, electrical conductivity, density, melting point, and boiling point. The colors of the elements are quite consistent from one element to the next. The mass-to-volume ratio, color, odor, hardness, and volume are a few examples of the physical characteristics of matter. Other characteristics include color, which interacts with visible light, hardness, and volume. Chemistry characteristic. Because combustion is a chemical reaction, a substance's combustibility—a feature that determines whether it will experience a combustion reaction—is a chemical attribute. c. color: A material quality.
Question
Which of the following properties of substances are physical properties? Select all that apply
a. Combustibility
b. Color
c. Reactivity
d. Melting Point
e. Mass
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given 6.19 grams of H2, how many grams of CO are required?Please look at screenshot.
As per the given balanced chemical equation of the reaction between hydrogen gas and CO gas 1 mole or 28 g of CO needs 2 moles or 4 g hydrogen gas Then,6.19 grams of hydrogen gas requires 43.3 g of CO.
What is methanol ?Methanol is an organic compound called an alcohol. It can be synthesized by passing carbon monoxide gas through hydrogen gas. The balanced chemical equation of their reaction is given here.
It is clear that, 2 moles of hydrogen gas requires1 mole CO gas for complete reaction.
mass of 2 moles of hydrogen gas = 4 g
molar mass of CO = 28 g/mol
Then mass of CO gas required to react with 6.19 g of hydrogen gas is :
mass of CO = (6.19 × 28 ) / 4 = 43.3 g.
Therefore, as per the given equation, 43.3 g of CO is required to react with 6.19 g of hydrogen gas.
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Diego did a scientific investigation to determine the additive that would form the longest-lasting bubbles. First, he combined 1 liter of water with 200 milliliters of liquid detergent to make a bubble solution. Then, he placed an equal amount of this solution into 5 separate bowls. Diego did not add anything to the first bowl. He added 20 milliliters of a different substance to each of the four remaining bowls. He added glycerin to the second bowl, lemon juice to the third bowl, sugar to the fourth bowl, and corn syrup to the fifth bowl. Diego used a bubble-blowing machine in a temperature-controlled room to make bubbles of each kind separately so that they would be formed the same way each time. He used a timer to measure how long the bubbles of each kind lasted before they burst. He repeated the experiment four times and recorded the average time that each kind of bubble lasted in the table below. Bubble Blowing Experiment Substance Added to Bubble Solution Average Length of Time Bubbles Lasted none 29 seconds glycerin 174 seconds lemon juice 89 seconds sugar 23 seconds corn syrup 41 seconds Which of the following was a constant, or a factor kept the same throughout the experiment? the ratio of water to liquid detergent used to make the bubble solution the method used to form the bubbles the kind of substance added to the bubble solution the temperature at which the bubbles were formed the method used to time how long the bubbles lasted the length of time the bubbles lasted
The constant, or factor kept the same throughout the experiment, was the method used to form the bubbles.
What is experiment?An experiment is described as a procedure carried out to support or refute a hypothesis, or determine the efficacy or likelihood of something previously untried.
Diego combined 1 liter of water with 200 milliliters of liquid detergent to make a bubble solution after which he placed an equal amount of this solution into 5 separate bowls.
Diego used a bubble-blowing machine in a temperature-controlled room to make bubbles of each kind separately.
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Solubility is determined by: Select the correct answer below: O solute-solute forces O solvent-solvent forces O solute-solvent forces O all of the above
Solvent-solvent forces, solute-solvent forces, and solute-solvent forces all play a role in determining solubility. As a result, the best choice is all of the above.
How is solubility determined?A substance's solubility is the greatest amount of a solute that can dissolve in a specific amount of solvent; it is influenced by the chemical makeup of the solvent and the solute as well as by temperature and pressure.
How is a solute determined to be soluble in a solvent?Generally speaking, polar solutes dissolve best in polar solvents, and nonpolar solutes dissolve best in nonpolar solvents, which are closest in molecular structure. Additionally, solutes will be easier to dissolve if their molecules are smaller than those of the solvent.
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Please help ASAP ,100 points!
Researching solutions
In this task, you will conduct research and present your findings on the Haber process ( also called the Haber-Bosch process) and its historical significance. In the Haber process, nitrogen and hydrogen are converted to ammonia. You will compare the Haber process with the results you obtained from the simulation. Your presentation will consist of 10 to 15 slides, built using presentation software.
Part A
When designing a science presentation, look for credible sources. science doesn’t show bias, but humans do. Avoid sites and articles that provide facts with citing proper scientific evidence. You must be able to identify reliable sites so the data in your presentation is credible.
Use sources with URLs that end in .gov, such as CDC.gov. Government sites are reliable sources. You can also use sistes with URLS ending in .edu. they are usually trustworthy, but sometimes students, rather than scientists, write conent for .edu websites. Always identify the author of the source before proceeding. some .org and .com sites are credible, but it’s important to verify their authenticity. When reviewing a source, ask these questions:
• Who is the author?
•Is this person a chemistry expert?
• What is the document’s purpose?
• Does the documents state facts that scientists can support with evidence?
• Are there opinions in the document?
• How old is the document?
• Do other credible sources support the statements in the document?
Search for credible websites or publications on the Haber process and its inventors. Write down atleast two sources you will use for your presentation, and cite them using Modern Language Association (MLA) citation methods.
Here are two sources you could use for your presentation on the Haber process:
"The Haber-Bosch Process: Feeding the World with Ammonia." Chemical Safety Facts, American Chemistry Council, 2020, https://www.americanchemistry.com/Education/Resources/High-School/Chemical-Safety-Facts/The-Haber-Bosch-Process-Feeding-the-World-with-Ammonia.html
"The Haber Process." Royal Society of Chemistry, 2020, https://www.rsc.org/periodic-table/element/1/nitrogen/the-haber-process
MLA citation for source 1:
"The Haber-Bosch Process: Feeding the World with Ammonia." Chemical Safety Facts, American Chemistry Council, 2020, https://www.americanchemistry.com/Education/Resources/High-School/Chemical-Safety-Facts/The-Haber-Bosch-Process-Feeding-the-World-with-Ammonia.html
MLA citation for source 2:
"The Haber Process." Royal Society of Chemistry, 2020, https://www.rsc.org/periodic-table/element/1/nitrogen/the-haber-process
Q1)Which of the following is a chemical reaction? Freezing liquid Mercury Adding yellow to blue to make green Cutting a piece of paper into two pieces Dropping a sliced orange into a vat of Sodium Hydroxide Filling a balloon with natural air Painting a wall blue A bicycle rusting Ice cream melting Scratching a key across a desk Making a sand castle Q2) Which of the following is a physical reaction? Frying an egg Digesting carrots A Macbook falling out of a window Creating ATP in the human body Dropping a fizzy tablet into a glass of Water Shattering Glass with a baseball Corroding Metal Fireworks Exploding Lighting a match Baking a cake
Whenever the bonds between the reactant and product molecules are broken or new bonds are built and formed, a chemical reaction takes place and a new substance is created.
What seven chemical processes are there?Combustion, decomposition, neutralization, redox, precipitation or double-displacement, and synthesis are some of the numerous types of reactions that can occur depending on the product that is produced.
What are the 5 main chemical reactions?Combustion, combination, decomposition, single-replacement, and double-replacement are the five fundamental categories of chemical reactions. You can categorize a reaction by looking at the reactants and outcomes of the reaction in question.
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the carbon skeletons of which two amino acids enter metabolism at the level of pyruvate? choose the best answer(s) from the list below. 1- alanine and serine 2- alanine and cysteine 3- serine and asparagine 4- alanine and aspartate
The best answer 1 and 2, the carbon skeletons of which two amino acids enter metabolism at the level of pyruvate are alanine and serine or alanine and cysteine.
Metabolism refers to the chemical processes that occur within an organism to maintain life. These processes include the breakdown of nutrients to release energy and the synthesis of molecules that the body needs for growth and repair. There are two main types of metabolism: catabolism, which involves the breakdown of molecules to release energy, and anabolism, which involves the synthesis of molecules using energy.
The rate at which an individual's metabolism operates can affect their weight, with a faster metabolism generally leading to a higher rate of calorie burn and a slower metabolism leading to a lower rate of calorie burn. However, factors such as genetics, age, and sex also play a role in determining an individual's metabolism. Additionally, lifestyle factors such as diet and physical activity can also impact metabolism, with regular exercise and a balanced diet known to help boost metabolism.
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oxalic acid formula
s the number of protons in the nucleus of an atom, which determines the chemical properties of an element and its place in the periodic table.target 1 of 6 the number of protons plus neutrons in an atom, represented as an average of all naturally occurring forms of the element, is known as blank.target 2 of 6 blank, also called micronutrients, are any chemical element required by living organisms in miniscule amounts, but cells require them to survive.target 3 of 6 blank is one of the four elements that make up 96.3% of living cells.target 4 of 6 blank is one of the seven elements that make up a small fraction, approximately 3.7%, of living cells.target 5 of 6 blank is one of the fourteen trace elements and is a component of certain digestive enzymes and other proteins.
The amount of electrons that surround the nucleus is dependent on how many protons there are, and the arrangement of such electron governs the majority of an element's chemical properties.
What affects the chemical and physical properties of an atom?An element's atomic number determines its chemical characteristics.The quantity of electrons in an atom determines bonding as well as various chemical properties.The atomic mass Z is equivalent to the amount pf electrons inside a neutral atom.
What influences an atom's chemical characteristics the most?The quantity of protons present in the nucleus affects an element's chemical characteristics.The atomic number refers to this quantity of protons.The total number of neutrons and protons in the atom's nucleus determines the mass of a atom, or its atomic mass.
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The weak acid HZ has a K, of 2.55 x 10-4. Calculate the pH of 0.045 M HZ
The pH of the the solution is the negative logarithm of its H+ ion concentration. Here, the H+ concentration is 0.00338 M. Then The pH of the solution is 2.4.
What is pH ?pH of a solution is the measure of its acidity or basicity. It measures the concentration of H+ or hydronium ion in the solution. It is the negative logarithm of the H+ ion concentration of the solution.
pH = -log [H+]
Given that, k = 2.55 × 10⁻⁴M.
[HZ] = 0.045 M.
k = [H+] [Z-]/[HZ]
Here the solution gives equal number of H+ ions and Z- ions. Hence, [H+] = [Z-]
[H+]² = [HZ] k = 0.045 M ×2.55 × 10⁻⁴M
[H+] = 0.00338 M.
pH = - log (0.00338 ) = 2.4
Therefore, the pH of the solution is 2.4.
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put the four molecules in order based on increasing imf strength. water ethylene glycol ethanol diethyl ether
The four molecules in ascending strength of in order. ethanol, dichloromethane, ethyl acetate, water, and ethylene glycol
Solvents' polarity indices can be used to identify how polar they are. The capacity of the solvent to interact with various polar test solutes is measured by the polarity index.
With a polarity index of 2.8, diethyl ether is the least polar substance.
With a 3.1 polarity index, dichloromethane
4.3 on the polarity index of ethyl acetate
With a polarity index of 5.2, ethanol is the most polar substance.
These solvents' different polarity are caused by variances in their structural makeup. Because they include bonds between elements with vastly differing electronegativities, such oxygen and hydrogen, polar solvents exhibit enormous dipole moments.
Diethyl ether is less polar than dichloromethane, which has two electronegative chlorine atoms bound to a carbon atom, since it contains two non-polar methyl groups. Similarly, diethyl ether has a greater dipole moment than dichloromethane because it comprises two highly electronegative oxygen atoms bonded to carbon. Given the solvents, ethanol is the most polar because it possesses the oxygen hydrogen bond with the biggest dipole moment.
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Note: The correct question would be as bellow,
Put the four molecules in order based on increasing imf strength
water
ethylene glycol
ethanol
diethyl ether
in a select answer , two atoms share electrons unequally, while in a select answer , atoms are split equally between two atoms.
In a polar covalent bond, two atoms share electrons unequally, while in a non-polar covalent bond, atoms are split equally between two atoms.
There аre two types of covаlent bonds: polаr аnd nonpolаr. In а polаr covаlent bond, the electrons аre unequаlly shаred by the аtoms becаuse they аre more аttrаcted to one nucleus thаn the other. The relаtive аttrаction of аn аtom to аn electron is known аs its electronegаtivity: аtoms thаt аre more аttrаcted to аn electron аre considered to be more electronegаtive.
Nonpolаr covаlent bonds form between two аtoms of the sаme element or between different elements thаt shаre electrons equаlly. For exаmple, moleculаr oxygen ([tex]O_{2}[/tex]) is nonpolаr becаuse the electrons will be equаlly distributed between the two oxygen аtoms. The four bonds of methаne аre аlso considered to be nonpolаr becаuse the electronegаtivies of cаrbon аnd hydrogen аre neаrly identicаl.
Your question is incomplete, but most probably your full question was
In a _____, two atoms share electrons unequally, while in a _____, atoms are split equally between two atoms.
Thus, the correct answers are polar covalent bond; non-polar covalent bond
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a scrubber on a coal-fired power plant is useful to remove which of the following? sulfur dioxide carbon dioxide particulate matter i only ii only iii only i and iii only
sulfur dioxide. The scrubber is an apparatus installed in a coal-fired power plant to clean the passing gas through the smokestack.
Why do people use sulfur scrubbing?In order to lessen acid rain, there are additional methods in use that really can extract sulfur dioxide in waste gases.These procedures, known as "sulfur scrubbing," can remove and over 95% of the sulfur dioxide present in waste gases.
How may sulfur emissions from coal-fired power plants be reduced?Utilizing less sulfuric coal is one option.The coal can also be "washed" to get some of the sulphur out.Scrubbers are a piece of machinery that the power plant can add to remove sulfur dioxide from waste gases the smokestack.
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Magnesium is the limiting reactant in this experiment. calculate the theoretical yield of MgO for each trial using stoichiometry.
Trial 1:
Trial 2:
The theoretical yield of the reaction is 0.26 g.
What is the stoichiometry?Stoichiometry is the branch of chemistry that deals with the quantitative relationships between reactants and products in a chemical reaction. It involves the calculation of the amount of reactants needed to produce a certain amount of product, or vice versa. The stoichiometric coefficients in a balanced chemical equation represent the ratio of the moles of reactants to the moles of products in the reaction.
For trail 1- Mass of Mg = 26.985 - 26.679 = 0.306 g
Mass of MgO = 27.178 - 26.679 = 0.499 g
The Number of moles of Mg = 0.306 g/24 g/mol
= 0.013 moles
2 moles of Mg gives 1 mole MgO
0.013 moles will give 0.013 moles * 1 mole/2 moles
= 0.0065 moles
Mass of the MgO = 0.0065 moles * 40 g/mol
= 0.26 g
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if this student combines 100 molecules of a a and 100 molecules of b b , the student obtains 100 molecules of ab a b . how many molecules of a a would this student need to make 5000 molecules of ab a b ? (assume the student had enough of molecule b b to make 5000 molecules of ab a b .)
The student combines 100 molecules of A and 100 molecules of B to make 100 molecules of AB. Therefore, to make 5000 molecules of AB, the student would need 5000/100= 50 times the amount of A, or 50 * 100 = 5000 molecules of A.
The reaction of chemicals A and B to synthesize product AB can be represented by the chemical equation A + B → AB. This means that for every molecule of A and B that react, one molecule of AB is produced. In the scenario given, the student combines 100 molecules of A and 100 molecules of B to obtain 100 molecules of AB. To make 5000 molecules of AB, the student needs to increase the amount of A accordingly. Using the ratio of the initial reaction, we can determine that 50 times the initial amount of A (100 molecules) would be required to synthesize 5000 molecules of AB. Therefore, the student would need 5000 molecules of A.
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Complete question:
A student needs to conduct a reaction that combines chemicals A and B to synthesize product AB. If we write this as a chemical equation it looks like: A +B → AB If this student combines 100 molecules of A and 100 molecules of B, the student obtains 100 molecules of AB. How many molecules of A would this student need to make 5000 molecules of AB? (Assume the student had enough of molecule B to make 5000 molecules of AB.) Express your answer as an integer
show the mechanism for the generation of the acylium ion of an acid anhydride is used instead of an acyl chloride for the source of the acylium ion
The complex's C-Cl bond breaks down to produce an acylium ion. Positively charged and resonance stabilized, the acylium ion has a carbon atom.
What processes lead to acylation?In numerous acylation processes, succinic acid is frequently utilized. Two or more succinic acid salts can combine to create a single chemical through a process known as acylation. To stop the rearrangement processes that happen during the alkylation process, the acylation procedure is performed.
Where is acylation found?It is known as N-acylation (amide linkage), S-acylation (thioester linkage), or O-acylation (ester linkage) depending on which amino acid residues (Lys, Cys, Ser/Thr) are commonly subjected to the acylation process.
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part a - which kinds of chemicals were found to be produced in the flasks at the conclusion of the miller-urey experiment?
The kinds of chemicals found to be produced in the flasks at the conclusion of the Miller-Urey experiment are wаter ([tex]H_{2}O[/tex]), methаne ([tex]CH_{4}[/tex]), аmmoniа ([tex]NH_{3}[/tex]) аnd hydrogen ([tex]H_{2}[/tex]).
The Miller-Urey experiment (or Urey-Miller experiment) wаs аn experiment thаt simulаted hypotheticаl conditions present on the eаrly Eаrth аnd tested for the occurrence of chemicаl evolution. The experiment used wаter ([tex]H_{2}O[/tex]), methаne ([tex]CH_{4}[/tex]), аmmoniа ([tex]NH_{3}[/tex]) аnd hydrogen ([tex]H_{2}[/tex]). The chemicаls were аll seаled inside а sterile аrrаy of glаss tubes аnd flаsks connected together in а loop, with one flаsk hаlf-full of liquid wаter аnd аnother flаsk contаining а pаir of electrodes. The liquid wаter wаs heаted to induce evаporаtion, spаrks were fired between the electrodes to simulаte lightning through the аtmosphere аnd wаter vаpor, аnd then the аtmosphere wаs cooled аgаin so thаt the wаter could condense аnd trickle bаck into the first flаsk in а continuous cycle.
Your question is incomplete, but most probably your options were
A. methane, ammonia, and hydrogen
B. amino acids and carbohydrates
C. amino acids, carbohydrates, and nucleic acids
D. carbohydrates and nucleic acids
Thus, the correct option is A.
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Based on what you have learned why do think you are told not to wear black and other colors in warm weather?
Answer: dark clothes have trouble reflecting the sun's rays
Explanation:
Because of that, the dark-colored clothing traps the heat from the sun. This then makes you feel much hotter.
The chemical para–dichlorobenzene has been used as insecticide for almost 75 years. It has the molecular formula C6H4Cl2. What is the most accurate value for the percent chlorine, by mass, in para–dichlorobenzene?
Answer:lol
Explanation:
kool
give one permissible set of four quantum numbers for each of the outermost electrons in a single as atom when it is in its ground state.
In quantum mechanics, the state of an electron in an atom is described by four quantum numbers: the principal quantum number (n), the angular momentum quantum number (l), the magnetic quantum number (m), and the spin quantum number (s).
For the outermost electrons in a single arsenic atom in its ground state, one possible set of four quantum numbers would be n=4, l=3, m=-3, s=1/2.
The principal quantum number (n) describes the energy level of the electron, with larger values of n corresponding to higher energy levels. In this example, the electron is in the fourth energy level (n=4).
The angular momentum quantum number (l) describes the shape of the electron's orbital, with values ranging from 0 to n-1. In this example, the electron is in a p orbital (l=3).
The magnetic quantum number (m) describes the orientation of the electron's orbital in space, with values ranging from -l to +l. In this example, the electron's orbital is oriented in the direction of -3 times the z-axis.
The spin quantum number (s) describes the intrinsic angular momentum of the electron, with a value of 1/2. This intrinsic angular momentum is a fundamental property of electrons and is not related to their orbital motion.
This set of quantum numbers describes one of the two electrons in the outermost shell of the arsenic atom in its ground state. Another electron in the same shell could have a different set of quantum numbers, but it would still be subject to the same overall energy and angular momentum constraints.
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which of the following compounds is the stronger acid? an acid with a pka of 13.5 an acid with a pka of 13
An acid with a pKa value of 13 is the stronger acid. This is because the lower the pKa value, the stronger the acid is.
The strength of an acid is determined by its dissociation constant (Ka) or the negative logarithm of the dissociation constant (pKa). The lower the pKa value, the stronger the acid. A higher dissociation constant indicates a stronger acid, as the acid will dissociate more readily in solution and release more hydrogen ions. The dissociation constant can be used to calculate the pH of a solution, which is a measure of the concentration of hydrogen ions in the solution.
Therefore, an acid with a pKa of 13.5 is a weaker acid than an acid with a pKa of 13, as the latter has a lower pKa value. This means that the acid with a pKa of 13 will dissociate more readily in solution and release more hydrogen ions, making it the stronger acid.
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How many unique carbons are in the following molecules (how many signatures/peaks would you expect to see in a 13C NMR spectrum)?
the following molecules Unique Carbons is : a 1 b 1 c 6 d 7 e 8 f 9.
What are distinctive carbons?Carbon atoms are special because they can join to form extraordinarily long, strong chains that can contain different-sized branches or rings and frequently have tens of thousands more carbon atoms.Similar chains can be created by silicon and just few other elements, although they tend to be much shorter and less robust.
In how many different carbons does benzene come?With chemical formula C6H6, benzoene is a significant organic chemical compound. Its molecule is made up of 6 carbon atoms arranged in a ring, with 1 hydrogen atom connected to each carbon atom.
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which of the following best explains why more contaminants are leached when solid waste is crushed into small particles and put in contact with water than when the particles are large?
The following which best explains why more contaminants are leached when solid waste is crushed into small particles and put in contact with water than when the particles are large is that smaller particles have a larger surface area per unit volume than larger particles.
What is a Contaminant?This is referred to as a biological, chemical, physical or radiological substance that becomes harmful for humans or living organisms.
Smaller particles have a larger surface area per unit volume than larger particles which is why more contaminants are easily leached.
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Hi please help with AP Chem
The half-life of a reaction is described as the time required for the concentration of the reactant to decrease to one-half of its initial value.
The relationship between the concentration of A and the half-life can be shown as:
t1/2 = k / 2.303 / [A]
The reaction is first order, so the rate constant can be shown as:
k = k' * e^(-Ea/RT)
t1/2 = (1 / 0.0387 M s^-1) * 2.303 / 0.333 M = 62.12 s
Therefore, the half-life of the reaction is 62.12 s at 400°C.
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How many oxygen atoms are present in one mole of serotonin?
C10H12N2O
A. 7.2×10²⁴ B. 1.2×10²⁴ C. 6.02×10²³ D. 6.02×10²⁴
The number of oxygen atoms present in one mole of serotonin would be 6.02×10²³ atoms.
Number of atoms in moles of substancesSerotonin goes by the chemical formula C10H12N2O. This means that 1 mole of serotonin contains 10 moles of carbon 12 moles of hydrogen, 2 moles of nitrogen, and a mole of oxygen.
According to Avogadro, 1 mole of any substance contains 6.02×10²³ atoms of the substance.
In other words, 1 mole of oxygen atom will contain 6.02×10²³ atoms of oxygen.
This means that 1 mole of serotonin will contain 6.02×10²³ atoms of oxygen.
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Answer:
B 1.2x10^24
Explanation:
how many valence electrons does the following element have? 1s22s22p63s23p63d104s24p65s24d105p4 group of answer choices 4 6 10 14
Which of the following reactions can be used to synthesize an aldehyde as the reaction product? Select all that apply.A) Reduction of esters using DIBAL-HB) Hydroboration-oxidation of a terminal alkyneC) Reduction of carboxylic acids using LiAlH4D) Oxidation of a primary alcohol with PCC.E) Hydroboration-oxidation of an internal alkyne.
Reactions that can be used to synthesize an aldehyde as a reaction product are:
Reduction of esters using DIBAL-H.Reduction of carboxylic acids using LiAlH4.Oxidation of a primary alcohol with PCC.The other two options (B and E) do not result in the synthesis of an aldehyde as a reaction product.
Correct answer: letters A, C and D.
Extending the explanation of the above reactions, the reduction of esters using DIBAL-H involves the addition of a hydride to the carboxylate, resulting in the formation of an alkoxide which is then hydrolyzed to a primary alcohol.
The hydroboration-oxidation of a terminal alkyne involves the addition of a borane to the alkyne, resulting in the formation of a boronate ester which is then oxidized to a ketone. The reduction of carboxylic acids using LiAlH4 involves the addition of a hydride to the carboxyl group, resulting in the formation of an alkoxide which is then hydrolyzed to a primary alcohol.
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if a mixture of two moles each of gases A and B are mixed to give a total pressure of 20 atm pressure. calculate the partial pressure of gases A and B
If a mixture of two moles each of gases A and B are mixed to give a total pressure of 20 atm pressure, the partial pressure of gases A and B is 10 atmospheres.
What is pressure?Pressure is defined as the force applied on an object perpendicular to it's surface per unit area over which it is distributed.Gauge pressure is a pressure which is related with the ambient pressure.
There are various units by which pressure is expressed most of which are derived units which are obtained from unit of force divided by unit of area . The SI unit of pressure is pascal .
It is a scalar quantity which is related to the vector area element with a normal force acting on it.It is distributed over solid boundaries and across arbitary sections of fluid normal to the boundaries at every point.
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Determine whether each of the following compounds is likely to exist as a molecule, or as an ionic compound:
Hydrogen fluoride; HF
Silicon tetrachloride; SiCl4
Elemental sulfur as S8
Disodium dioxide; Na2O
PF3
Be3N2
AlP
CBr4
We determine the probability that each of the following compounds exists as a molecule or as an ionic compound:
Hydrogen fluoride (HF) is a polar covalent molecule that exists as a gas at room temperature. Silicon tetrachloride (SiCl4) is an ionic compound, as the silicon atom is bonded to four chlorine atoms by electrostatic attraction. Elemental sulfur (S8) exists as a molecule with a ring-like structure. Disodium dioxide (Na2O) is an ionic compound, as the sodium atoms are bonded to an oxygen atom by electrostatic attraction. Phosphorus trifluoride (PF3) is a polar covalent molecule, as the phosphorus atom is bonded to three fluorine atoms by covalent bonds. Beryllium nitride (Be3N2) is an ionic compound, as the beryllium atom is bonded to two nitrogen atoms by electrostatic attraction. Aluminum phosphide (AlP) is an ionic compound, as the aluminum atom is bonded to a phosphorus atom by electrostatic attraction. Carbon tetrachloride (CBr4) is a polar covalent molecule, as the carbon atom is bonded to four chlorine atoms by covalent bonds.
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when comparing ethanol, c h 3 c h 2 o h , and sodium ethoxide, n a o c h 2 c h 3 , sodium ethoxide is the better nucleophile because it _________.
when comparing ethanol, CH CH, OH, and sodium ethoxide, NaOCH, CH3, sodium ethoxide is the better nucleophile because it has a negative charge.
In chemistry, a nucleophile is a chemical species that form bonds with the aid of donating an electron pair. All molecules and ions with a loose pair of electrons or at least one pi bond can act as nucleophiles. due to the fact nucleophiles donate electrons, they're Lewis bases.
Nucleophilic describes the affinity of a nucleophile to bond with definitely charged atomic nuclei. Nucleophilicity, on occasion known as nucleophile strength, refers to a substance's nucleophilic person and is often used to compare the affinity of atoms. Neutral nucleophilic reactions with solvents consisting of alcohols and water are named solvolysis. Nucleophiles might also participate in nucleophilic substitution, wherein a nucleophile will become attracted to a full or partial high-quality charge and nucleophilic addition. Nucleophilicity is intently associated with basicity.
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given 2.04 moles of Al, how many grams of sulfur are required?Please look at screenshot.
As per the given balanced chemical equation of the reaction between aluminum and sulfur, 2 moles of Al needs 3 moles of sulfur. Then, 2.04 moles of Al requires 3.06 moles of S.
What is aluminum sulphide ?Aluminum sulphide, Al₂S₃ is an ionic compound formed by donation of electrons from Al metal to S atoms. The balanced chemical equation of their reaction is given here.
It is clear that, 2 moles of aluminum requires 3 moles of sulfur for complete reaction. Hence, the number of moles of sulfur needed to react with 2.04 moles of Al is calculated as follows:
Number of moles of S = (2.04 ×3 ) / 2 = 3.06.
Therefore, as per the given equation, 3.06 moles of sulfur is required to react with 2.04 moles of aluminum.
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