A. The moles of H2 that could be produced if 14.0 g of water were to undergo the reaction above is 0.0925 mol H₂O.
24.6 g of Calcium Hyduds were combined with 14g of water which substance would be completely consumed ding the elation
Above we calculate the moles of CAH₂ and moles of H₂O
So, the moles of CAH₂ are more than the moles of H₂O
The substance consumed completely is H2O (water)
15 g of aluminum Sulfide and heart log water
Al2S3 + H2O → 2A(OH)₃ + 3H₂S
The chemical formula for limiting agent
15g x 1mol/150.188 = 0.0998 mol Al2s3
10g x 1mol/6 x 18 = 0.0925 mol H₂O
A mole of the H₂O is less So, H₂O is limiting reagent
B. The limiting reagent and report the theoretical yield of H2S, in grams, that could be produced from this reaction.
c. Theoretical yield, in grams, of H2S
24.6 g of Calcium Hyduds were combined with 14g of water which substance would be completely consumed ding the
Above we calculate the moles of CAH2 and moles of H₂O
So, the moles of CAH2 is more than the moles of H₂O
The substance consumed completely is H2O (water)
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an nmr spectrum of the r-carvone reactant (not the product) is provided for you on blackboard. assign the peaks to specific carbon atoms using the letters on the structure. carbons that you are not expected to be able to differentiate are listed together.
The peaks to specific carbon for the nmr spectrum of the r-carvone reactant are:
Carbons a and j: 15.65 and 20.46ppm
Carbons b and i: 42.41ppm
Carbon c: 144.64ppm
Carbon e: 199.57ppm
Carbons d and f: 110.43pppm
Carbon g: 31.18
Carbon h: 132.27ppm
What is ccarbon?
Carbon is the 15th most plentiful element inside the Earth's crust, and the fourth most abundant element inside the universe via mass after hydrogen, helium, and oxygen. Carbon's abundance, its particular diversity of organic compounds, and its unusual capability to form polymers at the temperatures usually encountered in the world, enables this detail to serve as a common element of all regarded lifestyles. It is the second one most considerable element in the human body via mass (approximately 18.5%) after oxygen.To know more about carbon, click the link given below:
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Draw the structure of the straight chain hydrocarbon that produces the IR and mass spectrum given. For common IR absorptions see Tables 16.3.Hint: Take note of the characteristic IR peak at 2120 cm-1 and relate this to the size of the M-1 peak in the mass spectrum.100E 5021203311 2962040003000200015001000500Wavenumber (cm)
2-Methylbutane's mass spectrum. Pentane's isomer, 2-methylbutane, has the same molecular make-up as isomers do. In comparison to IR spectroscopy, the MS offers the distinct advantage that more structural data may be ascertained.
What is mass spectrum ?
Mass spectrometry can be used to determine the skeletal formula of a structural isomer of heptane butan-1-ol generated in The composition of another ester, an isomer of ethyl propanoate, which has a strong peak in its mass spectrum at m/z = 71. In mass spectrometry, ions are produced from a sample that will be examined. The process of ionizing these ions can either result in the production of the molecular ion M+. The majority of infrared spectra can be produced as a linear frequency absorbance spectrum.
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B) State right (V) or wrong (x): 1. The internal energy in the cyclic process has constant value. 2. An adiabatic system is one which cannot transfer energy but transfer matter to and from its surrounding. 3. Heat of combustion could be used in calculation of the heat of formation. 4. An isochoric process takes place at constant concentration.
Answer:
1. False. The internal energy of a system can vary during a cyclic process.
2. False. An adiabatic system is a system that does not exchange heat with its surroundings. It may still be able to transfer matter or energy in other ways.
3. True. The heat of combustion is the amount of heat produced when a substance is burned. It can be used to calculate the heat of formation, which is the heat absorbed or released when a substance is formed from its elements.
4. False. An isochoric process is a process that takes place at constant volume. It does not necessarily involve a change in concentration.
Explanation:
which is a reactant in the cellular respiration reaction?; what is the purpose of cellular respiration; where in the cell does the second stage of cellular respiration take place; what is the second stage of cellular respiration; what is cellular respiration?; cellular respiration equation; smaller molecules are processed releasing energy; cellular respiration process
A metabolic process called cellular respiration converts glucose to ATP. Glycolysis and pyruvate oxidation are two of the steps of cellular respiration.
What occurs during oxidation?There is an oxidation reaction when oxygen interacts with a substance or an element. The process of removing hydrogen from reactant species is another definition of oxidation. A molecule, particle, or ion undergoes oxidation when it loses electrons.
What does cellular respiration do, and why?The process of breaking down sugar in the presence of oxygen inside the mitochondria in organisms (animals and plants) releases energy in the form of ATP. This procedure results in the waste products carbon dioxide and water.
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1. Glucose is a reactant in the cellular respiration reaction. When oxygen is present, glucose is broken down to provide energy.
2. Cells produce ATP (adenosine triphosphate), which serves as their main source of energy during cellular respiration.
3. The Krebs cycle or citric acid cycle, the second stage of cellular respiration, occurs in the mitochondria of the cell.
4. The citric acid cycle, also known as the Krebs cycle, is the second stage of cellular respiration and an enzymatic set of events that further breaks down the byproducts of glycolysis.
5. The process through which cells convert organic substances such as glucose into ATP and release energy is known as cellular respiration.
6. The equation for cellular respiration is:
Glucose + Oxygen → Carbon Dioxide + Water + ATP
7. Small molecules, such as glucose or other organic substances, are broken down through a sequence of metabolic events during cellular respiration, generating energy in the process. This energy is stored in the form of ATP, which cells can use for a variety of energy-intensive functions.
To produce energy in the form of ATP, cells must engage in cellular respiration. Through a sequence of chemical events, organic molecules such as glucose are broken down. These multi-step processes take place in the mitochondria of the cell.
Glycolysis, which occurs in the cytoplasm during cellular respiration, is the initial step in the breakdown of glucose. As a result pyruvate and a small amount of ATP are produced. Pyruvate then moves to the mitochondria for further oxidation.
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Your question is incomplete, most probably the complete question is:
which is a reactant in the cellular respiration reaction?; what is the purpose of cellular respiration?where in the cell does the second stage of cellular respiration take place?what is the second stage of cellular respiration?what is cellular respiration?; cellular respiration equation; smaller molecules are processed releasing energy; cellular respiration processtaking logarithms and antilogarithms is necessary to solve many chemistry problems. for practice, complete the following table, where is a number.
N = 7.35 ln in row 1; N Equals ln(7.35) = 1.995 logarithmic N = log(7.35) (7.35) To solve many chemical problems, logarithms and antilogarithms must be used.
Antilogarithms: How are they solved?The bases of logarithm and antilog are both 2.7183. Logarithms and antilogarithms with bases of 10 need be multiplied by 2.303 to create natural logarithms and antilogarithms.
How are the antilogarithm and log calculated?For both numbers, the base must be the same. Log b x y = p - q (= log b x - log b y is the outcome of taking logs on both sides. The inverse function of the difference in the two numbers' logarithms is what is used to divide them.
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In each case below, specify whether the impurity element will act as a donor or acceptor when added to the indicated semiconducting material. Impurity Semiconductor (a) in CdTe (b) AI Si
Impurity :- Cd , AI
Semiconductor :- Te ,Si
Donor Impurities :- The elements added to a donor to increase the electrical conductivity of that donor. Increase the free electrons in the semiconductor.Atoms have five valence electrons.Group V elements.Forms four covalent bonds inside the semiconductor, leaving the fifth electron as a free electron.
Acceptor impurities :-The elements added to an acceptor to increase the electrical conductivity of that acceptor.Group III elements.Increase the holes present in the semiconductor.Atoms have three valence electrons.Forms three covalent bonds inside the semiconductor, leaving a hole where a covalent bond is missing.
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for this reaction it was observed that the first three half-lives were 12.5 h, 25 h, and 50 h when a
Concentration of A after 50 hours = 0.1013 M.
Given that initial concentration of A = 1.621 M
After first half life is after 12.5 hours, concentration is reduced to 0.8105 M.
Concentration of A after 12.5 hours is 0.8105 M
After second half life ( ie 25 hours = 2*12.5 h), concentration of A is reduced to 0.4053 M
After 3rd half life (ie 37.5 hours = 3*12.5 hours) , concentration of A is reduced to 0.2026 M ( Half of 0.4053 M)
Therefore Concentration of A after 50 hours = 0.2026 M
After 4th half life (ie 50 hours = 4*12.5 hours), concentration of A is reduced to 0.1013 M ( Half of 0.2026 M)
Therefore concentration of A after 50 hours = 0.1013 M.
Concentration is the ratio of a constituent's abundance to the mixture's overall volume. The concentration can refer to any form of chemical mixture, but is most usually used to describe the solutes and solvents in solutions. There are several different types of mathematical descriptions: mass concentration, molar concentration, number concentration, and volume concentration.
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What happens when a gas particle collides with the wall of its container?; What happens to the force of impact of the particles with the container walls as the volume is reduced?; What happens to the force of impact of the particles with the container walls as the temperature increases?; How does pressure affect the collision of gas particles in a container?
The frequency of wall contacts and, consequently, the pressure of the gas rise as the volume of the container contains more gas particles.
A particle is a small, localised item that can have many physical or chemical qualities, such as volume, density, or mass. The term particle—or corpuscule in older texts—is used in the physical sciences. They range significantly in size or number, from tiny particles like atoms and molecules to macroscopic particles like powders and other granular materials. Subatomic particles like the electron are one example. Depending on their density, particles can also be employed to depict larger objects like astronomical bodies in motion or a crowd of people moving.
The meaning of the word particle is quite broad, although it is clarified as needed by different scientific disciplines. Particulate refers to anything that is made up of small particles.
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___________inversions are present during strong sieges of acidic smog in London. This type of inversion combined with the combustion of ____________ during December of 1952 resulted in thousands of deaths from the resulting smog.
Temperature inversions are present during strong sieges of acidic smog in London. This type of inversion combined with the combustion of coal during December of 1952 resulted in thousands of deaths from the resulting smog.
What is Temperature?
Temperature refers to the hotness or coolness of a body. In specific terms, it is the means of determining the kinetic energy of particles within an object. When particles move more quickly, the temperature rises, and vice versa.
The temperature has a crucial part in practically every area of our everyday life as well as in all scientific domains, from physics to geology.
As the temperature rises, so does the velocity of these particles.
Temperature is a proportion of how hot or cold something is; explicitly, a proportion of the typical motor energy of the particles in an item, which is a sort of energy related with movement. Be that as it may, how hot will be hot, and the way in which cold will be cold? The terms hot and cold are not extremely logical terms. We should utilize temperature to portray how hot or cold something is. How hot, for example, is liquefied iron? To respond to that inquiry, an actual researcher would gauge the temperature of the fluid metal. It is less befuddling to utilize temperature rather than words like hot or cold.
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let's repeat the calculation with new values just to check your learning. this time you'll go all the way through at once! alka-seltzer tablet: 3.15 g cup/vinegar/water: 35.42 g sample after reaction: 37.52
The surface area of the Alka-Seltzer tablets and the water's temperature served as independent variables. The time it took the Alka-Seltzer tablet to dissolve in water was the dependent variable.
It erases your progress and stretches your koorts. With several types of pain, including head pain, migraine, knee pain, oor pain, spier pain, gout pain, and menstrual cramps. Also with groans, tears, and verkoudness. Within a half-hour, your pain is reduced by the tablets, powder, and pills. Alka-Seltzer bruistabletten can be used to treat colic and pain associated with gloom and verkoudness, colic and pain following a vaccination, hoofdpijn, kiespijn, zenuwpijn, spit, spierpijn, menstrual pain, and rheumatoid pain. - For a quick effect, start at a lower magnification or, at the very least, a half hour before mealtime. Volwassenen maximum of 12 bruistabletten (=4000 mg) per 24 hours, distributed among 4 or more gifts. 2-3 bruistabletten each day. Ouderen A change in dosage seems unnecessary given that Alka-systemic Seltzer's bloating does not appear to affect older adults significantly.
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Question 4 (1 point)
If the decomposition of (NH4)2(CO3) is a first-order process with a rate constant of
0.196 s-1, how much ammonium carbonate would remain after 39.0 s, starting from
a concentration of 0.957 M?
Your Answer in units:
The final concentration of the reactant of a first order reaction can be determined from the rate constant equation. The concentration of ammonium carbonate after 39 s will be 0.003 M.
What is rate constant?Rate constant of a reaction is the rate of reaction when one molar concentration of the reactant is involved in the reaction. The expression for the rate constant k for first order reaction is :
k = 1/t ln (C0/Ct)
Where C0 be the initial concentration and Ct be the concentration after t seconds.
Given that C0 of ammonium nitrate = 0.957 M
rate constant = 0.196 /s
t = 39 s.
The concentration after 39 seconds is calculated as follows:
0.196 /s = 1/39s ln (0.957 M / Ct)
Ct = 0.957 / (ln⁻¹ (0.196 × 39))
= 0.003 M.
Therefore, the concentration of ammonium carbonate after 39 seconds will be 0.003 M.
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all of these phytochemical compounds have been studied for their potential lipid-lowering effects except for _____. a.Sterols. b.Flavonoids. c.Anthocyanins. d.Mercury
Mercury is a heavy metal of considerable toxicity
Scientific literature reveals various plants and plant derived natural products, i.e., phytochemicals, which can alleviate experimentally induced mercury toxicity in animals.
Phytochemicals have great antioxidant potential and are of great interest due to their beneficial effects on health of human beings, and they give immense health benefits to the consumers.The effects of phytochemical-rich foods on bioaccessibility of mercury in fish tissue (the amount of mercury that is released from fish into gastrointestinal tract fluid following a simulated digestion) were investigated using an in vitro digestion.
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identify each of the changes as either path dependent or path independent. you are currently in a sorting module. turn off browse mode or quick nav, tab to items, space or enter to pick up, tab to move, space or enter to drop. path dependent path independent answer bank
Answer:
turn off browse mode or quick nav, tab to items,
Explanation:
Which is a similarity between prokaryotic and eukaryotic cells
Eukaryotic and prokaryotic cells are similar in having ribosomes, cell membrane, and DNA, and have the same system of DNA replication.
Prokaryotic cells vs Eukaryotic cellsProkaryotic cells are primitive cells with no nucleus or membrane-bound organelles. The cells usually have cell walls whose content can vary depending on the organism. Their genetic materials lie freely within the cytoplasm.
Eukaryotic cells, on the other hand, are plant and animal cells with nuclei and membrane-bound organelles such as mitochondrion and chloroplast. Plant cells have cell walls while animal cells do not. The genetic materials of eukaryotic cells lie largely in the nuclei while organelles like mitochondrion and chloroplast have also been shown to contain some DNA.
While both cells are different in a lot of ways, they also have some similarities. These include:
Both have ribosomes which are organelles where protein synthesis takes place.Both have similar methods of gene expression - from DNA to RNA to proteins.Both have cell membranes, which are organelles that control the movement of materials in and out of the cell. The genetic materials of both cells are DNAs. The mechanisms of making DNA copies in both cells are similar.More on cells can be found here: https://brainly.com/question/12129097
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Which of the following would be a possible amino acid sequence for an oligopeptide given the experimental data below? 1. The amino acid composition is found to be (ala, lys, phe, met, cys, plus some decomposition products] 2. The peptide has a molecular weight around 700 Da and absorbs at 280 nm. 3. Treatment with carboxypeptidase results in tryptophan and a peptide. 4. CNBr treatment yields a tetrapeptide and a dipeptide. 5. Trypsin digestion produces an amino acid and a pentapeptide with met on the amino end. 6. Chymotrypsin digestion yields a dipeptide and a tetrapeptide. a. trp-lys-met-cys-met-ala b. lys-met-cys-phe-ala-trp c. trp-ala-phe-cys-met-lys d. lys-ala-cys-phe-met-trp er lys-met-cys-ala-phe-trp
Previous question
All the above mentioned facts suggest the sequence of amino acids to be Lys-Met-Ala-Phe-Cvs-Trp from N terminus to C terminus.
4.Carboxypeptidase is a protease enzyme that hydrolyzes (cleaves) a peptide bond at the carboxx terminal (C-terminal) end of a protein or peptide.
Hence tryptophan is at the C terminus of the peptide
5. Cyanogen bromide hydrolyzes peptide bonds at the C-terminus of methionine residues.
6.Trypsin cleaves peptide chains mainly at the carboxyl side of the amino acids lysine or arginine. Above two statements along with 2 and 3 in the question suggest the sequence to be
Lys-Met-X-X-X-TER
7. Chymotrypsin preferentially cleaves peptide amide bonds where the carboxyl side of the amide bond is a large hydrophobic amino acid (tyrosine, tryptophan, and phenylalanine). This fact along with point no. 4 in the question suggests the sequence to be Lys-Met-X-Phe-Cys-Trp
All the above mentioned facts suggest the sequence of amino acids to be Lys-Met-Ala-Phe-Cvs-Trp from N terminus to C terminus.
Amino acids are organic compounds containing both amino and carboxylic acid functional groups. [1] There are hundreds of amino acids in nature, but the most important are the α-amino acids found in proteins.There are only 22 α-amino acids in the genetic code.
amino acids can be classified as alpha (α), beta (β), gamma (γ), or delta (δ) amino acids according to the position of the core structural functional group. Other categories relate to polarity, ionization, and type of side-chain groups (aliphatic, acyclic, aromatic, containing hydroxyl or sulfur, etc.). In the form of proteins, amino acid residues constitute the second largest component of human muscle and other tissues (water being the largest). In addition to their role as residues of proteins, amino acids are It is involved in many processes such as neurotransmitter transport and biosynthesis. They are thought to have played a key role in making possible life and its origins on Earth.
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as you have just seen, the presence of one chirality center in a molecule causes it to not have a plane of symmetry. objects that lack a plane of symmetry are usually chiral. (the only exceptions are when they possess other symmetry elements such as a center or axis of symmetry.) which of the following molecules are chiral?
OH Go back to your original model (4 different colors) and make a second identical model of it: Make sure the two models are identical by trying to superimpose them; all of the atoms on one should superimpose on atoms of the same color in the other_ Now switch any two balls on one of the models and answer the following questions_ Are the models still superimposable? Are they identical? What is the word for non-identical structures that have the same molecular formula?
The molecules which are chiral are all of the atoms on one should superimpose on atoms of the same color in the other. Yes.
Yes, the model represents enantiomers. Because it has non-superimposable mirror image.
2. No
3. different
Yes the models are superimposable.Models represent identical structure.Models does not represent enantiomers. because the mirror images are superimposable.
Objects that possess plane of symmtery will never be chiral. Because one of the property of the chiral molecule is, it has no plane of symmetry or centre of symmetry. for example ,take our hand, it doesn't has the property of plane of symmetry. if a molecule possess plane of symmetry it will be an achiral molecule. When we split achiral molecule into two halves, one molecular half will be the exact reflection of the another half of the molecule.
In tetrahedral carbon, if the carbon bonds with four different groups or atoms there will be a symmetry lose. So that it is asymmetric.
3-methyl hexane possess plane of symmetry.
no chiral carbon present
4th carbon atom is chiral
The chiral carbon is present in 4th carbon atom
* All the models are not superimposable
*They are not identical
*Non identical structures with the same molecular formula are called enantiomers.
Baseball bat - Achiral
nail - Achiral
Baseball gloves - Achiral
Baseball - Chiral
Screw - Chiral
Spiral staircase - Chiral
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Why does NaCl not have a molecular formula
Answer:
This is because NaCI is a compound which is made from more than one kind of element
Explanation:
Answer:
because nacl is made up of two or more atoms
The IUPAC name of the following epoxide is НЫС H H CH2CH3 cis-2-ethyl-3-methyloxirane. trans-2-ethyl-3-methyloxirane. trans-1-ethyl-2-methyloxycyclopropane. trans-1-ethyl-2-methylethane epoxide.
The provided epoxide is known by its IUPAC name, trans-1-ethyl-2-methyloxycyclopropane. This is due to the fact that in the oxirane system, the methyl and ethyl groups are trans to one another.
Whether in a continuous chain or a ring, the longest chain of carbons joined by a single bond serves as the basis for IUPAC nomenclature. According to a particular set of priorities, all deviations, whether multiple bonds or atoms other than carbon and hydrogen, are denoted by prefixes or suffixes. Its molecular weight is 84.16 and its chemical formula is C6H12. The chemical is also known as trans-1-methyl-2-ethylcyclopropane.
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the lattice energy for nacl crystals is equal to -787 kj/mol. the enthalpies of solvation for na and cl- ions are equal to -424 kj/mol and -359 kj/mol respectively. for the process of making the nacl aqueous solution, the q value (the heat exchanged between the system i.e. nacl and the surroundings i.e. water) will have a negative sign.
the lattice energy for nacl crystals is equal to -787 kj/mol. the enthalpies of solvation for na and cl- ions are equal to -424 kj/mol and -359 kj/mol respectively. for the process of making the nacl aqueous solution, the q value will have a positive sign not negative sign.
The energy required to transform one mole of such an ionic solid into gases ionic constituents is described as lattice energy. It also can be described as the quantity of energy required to separate one mole of an anion crystal into individual atoms in a vacuum to use an endothermic process. The power of the bond among positive and negative ions in an anion is thus determined by the fees on the ions as well as the distance between both the facilities of the ions when they bundle together just to form a crystal. The liquid in an aqueous is liquid water. Solute (disintegrated) protons and compounds have been enclosed by water particles and integrated into the water's network of bonds.
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when the denominators of two terms in a partial fraction expansion are complex conjugates, the two associated ks are .
When the denominators of two terms in a partial fraction expansion are complex conjugates, the two associated Ks are (complex roots).
Definition of partial fraction
Partial fractions are defined as the fractions that are used for the decomposition of a rational expression. When any algebraic expression is splits into a sum of two or more rational expressions, then each part of the algebraic expression is called as a partial fraction.
We can apply lapcae and inverse laplace for finding the complex roots from its complex conjugates in a partial fraction.
Hence, when the denominators of two terms in a partial fraction expansion are complex conjugates then the two associated Ks are (complex roots).
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calculate the volume of 1.0 x 10-4 m cv solution that needs to be added to a 25.0 ml volumetric flask and diluted with deionized (di) water in order to prepare a calibration standard solution with a concentration of 1.0 x 10-5 m cv . as part of your preparation for performing this experiment, repeat this calculation for each of the calibration standards you would need to prepare in part i a of the experiment and record the information in your notes so that you have it ready during the lab session. also calculate the volume of 1.0 x 10-4 m cv solution required to prepare 10 ml of 3.0 x 10-5 m cv solution to be used in part ii b of the experiment and record the information in your notes. group of answer choices 2.5 milliliters 250 microliters 25 microliters 2.5 microliters none of the above
The volume of solution required to make final concentration of is 2.5 ml and for is 3 ml.
What are calibaration of a solution?
Standard addition, internal standard, and external standard techniques to quantitation all employ calibration solutions. Calibrants can be made gravimetrically using reference standards or pure reference materials, but they can also be made on a volumetric or other fraction basis.
For preparing the solution of known concentration and volume, the equation can be related as:
M1v1=M2V2
M1 and V1 are molarity of known solution
M2 AND V2 molarity of solution to be prepared
Here,M1=1 x 10^-4M
M2= 1 X 10^-5 M
V2= 25ml
1 x 10^-4 x V1=1 X 10^-5 x 25
Volume of required solution=2.5ml
To make the volume 10ml of 3 x 10^-5 x 10
Volume of required solution=3ml
Therefore the volume of solution required to make final concentration of is 2.5 ml and for is 3 ml.
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Why can't we just go directly from grams of reactant to grams of product?; Why mass can neither be created nor destroyed in a chemical reaction?; What is the principle that states that matter is not created or destroyed?; When two substances create a solution what happens to its mass?
The net change in mass between the reactants and products before and after a chemical reaction is zero, according to the rule of conservation of mass. This implies that mass cannot be produced or destroyed.
What are the names of the four chemicals?Intermetallic compounds are held together by metallic bonds, ions are held together by ionic bonds, molecules are held together by covalent bonds, and coordination complexes are held together by coordinate covalent bonds.
What exactly is a chemical?Every molecule that receives just an analytical grade is considered to be a chemical. Therefore, to put it another way, a chemical always contains the same "substance." There are several chemicals found in natural things like water.
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Which sample of copper has atoms with the lowest average kinetic energy? 1. 10. g at 45°C 2. 20. g at 35°C 3. 30. g at 25°C 4. 40. g at 15°C
At 15°C, 40 grams of copper have the lowest average kinetic energy.
What is average kinetic energy?The average kinetic energy of gas particles is proportional to the absolute temperature of the gas, and all gases have the same average kinetic energy at the same temperature.Kinetic energy is the energy generated by the motion of particles or objects.The greater the temperature provided to an atom, the greater the movement of its particles. As a result, the atom's average kinetic energy will increase.Similarly, as a metal's temperature decreases, so does the movement of its molecules. As a result, at low temperatures, the movement of molecules is reduced.Thus, of the options presented, 40 gram of copper at 15°C will have the lowest average kinetic energy.To learn more about kinetic energy refer to :
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Does the material dissolve in (mix with) water?
- baking soda
- baking powder
- salt
- sugar
- white flour
- white vinegar
- oil
Is the material less dense or more dense than water?
- baking soda
- baking powder
- salt
- sugar
- white flour
- white vinegar
- oil
The substances that mix with water are;
- baking soda
- baking powder
- salt
- sugar
- white vinegar
For the density of the materials
- baking soda - Less dense than water
- baking powder - Less dense than water
- salt - Less dense than water
- sugar - Less dense than water
- white flour - Less dense than water
- white vinegar - less dense than water
- oil - Denser than water
Which of the materials would mix with water?We know that the materials that can be able to mix with water are the material that are ionic in nature. As such a material that is ionic can be able to combine with water efficiently as if the material is polar, the polar bonds can also be able to well interact with the water molecule and dissolve.
If a substance is non polar then the substances would not be able to interact with water hence it can not dissolve.
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Given a cylinder of fixed volume filled with 1 mol of argon gas, which of the following is correct? (Assume all gases obey the ideal gas law.) a) If the temperature of the cylinder is changed from 25 degree c to 50 degree c, the pressure inside the cylinder will double. b) A cylinder of identical volume filled with the same pressure of helium must contain more atoms of gas because He has a smaller atomic radius than argon. c) If a second mole of argon is added to the original cylinder, the pressure will be doubled. d) If the temperature of the cylinder is changed from 400K to 200 K, the pressure will be doubled. e) None of the above.
Given a cylinder of fixed volume filled with 1 mol of argon gas, assume all gases obey the ideal gas law, none of the statement are correct. (Option E)
The ideal gas law, also known as the general gas equation, refers to a state of a hypothetical ideal gas. It is a good behavioral approximation of many gases exhibit under many conditions, although it has several limitations. It was suggested by Benoît Paul Émile Clapeyron in 1834 as a combination of the empirical Boyle's law, Charles's law, Avogadro's law, and Gay-Lussac's law. The ideal gas law is often written in an empirical form:
pV = nRT
where p, V and T are the pressure, volume, and temperature; n is the amount of substance; and R is the ideal gas constant.
Based on the relationship between pressure, volume, and temperature given by the equation, none of the statements are true.
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what must happen for a chemical reaction to take place; what happens to atoms in a chemical reaction; the substances that start a chemical reaction are called; a substance that is formed by a chemical reaction is called a; why do chemical reactions happen book; chemical changes of matter; 20 examples of chemical changes; importance of chemical reactions
When the chemical reaction takes place , the reactant will react with each other , the bond between the atom are broken and the new bond formation take place to form a new product.
When the chemical reaction happens , the reactant bond are broken and the formation of the new bonds are formed to make the new product. the substances that start a chemical reaction are called as the reactants. a substance that is formed by a chemical reaction is called as the product.
The reason for the chemical reactions occur is to the formation of the new substances and the energy change.
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'We discussed how some solutions are electrolytes in this lesson. Which of these would be a strong one? Question 27 options: C4H8O2 C6H12O6 C7H14O5 NaC2H3O2
The solution that will be a string one based on the information is D. NaC₂H₃O₂.
What is an electrolyte?A medium that contains ions and is electrically conducting due to the movement of those ions but does not conduct electrons is called an electrolyte. This includes the majority of salts, acids, and bases that are soluble when dissolved in polar solvents like water.
A solution is a specific kind of homogeneous mixture made up of two or more substances that is used in chemistry. A homogeneous mixture of two or more substances in relative amounts that can be continuously varied up to what is referred to as the limit of solubility is known as such a mixture. A solute is a substance dissolved in a solvent. The word "solution" is most often used to refer to the liquid state of matter, but it is also possible for gases and solids to form solutions.
Strong electrolyte means conducts electricty in water i.e, soluble ionic compound. It ionises in water completely. The correct option is D.
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as seen in problem 3.109, silicon carbide nanowires of diameter d 15 nm can be grown onto a solid silicon carbide surface by carefully depositing droplets of catalyst liquid onto a flat silicon carbide substrate. silicon carbide nanowires grow upward from the deposited drops, and if the drops are deposited in a pattern, an array of nanowire fins can be grown, forming a silicon carbide nano-heat sink. consider finned and unfinned electronics packages in which an extremely small, 10 m 10 m electronics device is sandwiched between two d 100-nm-thick silicon carbide sheets. in both cases, the coolant is a dielectric liquid at 20 c. a heat transfer coefficient of h 1 105 w/m2 k exists on the top and bottom of the unfinned package and on all surfaces of the exposed silicon carbide fins, which are each l 300 nm long. each nano-heat sink includes a 200 200 array of nanofins. determine the maximum allowable heat rate that can be generated by the electronic device so that its temperature is maintained at Tt <85oC for the unfinned and finned packages.
1.30×10 W is the maximum allowable heat rate that can be generated by the electronic device to maintain the temperature below 85°C for an unfinned package.
Write the equation conduction resistance
Rcond = d/kA.........(1)
Consider the following and substitute the values:
From the table of 'thermo physical properties of selected nonmetallic solids' at a temperature of 300K.
The thermal conductivity of Silicon carbide, k is given by 490 W/m - K
Dimension of the electronic device,
W=10x10⁻⁶m
Find the cross-sectional area
A=W²
= (10x10⁻⁶)² m²
Rcond = 100×10⁻⁹/490×(10×10⁻⁶)^2
= 2.04 K/W
The equation Convection resistance is given as follows:
Rconv = 1/hA
Consider the following and substitute the values:
Heat transfer coefficient of coolant
h= 1×10 W/m² K and
A= (10×10⁻⁶)² m²
Rcond = 1/10⁵x(10x10⁻⁶)^2
= 1×10⁵ K/W
Find the heat rate by using the following equation
q= T1- Tinfinity/ Rcond + Rconv...........(3)
= 2(85-20)/ (2.04+10⁵)
q = 1.30×10 W
Thus, the maximum allowable heat rate that can be generated by the electronic device to maintain the temperature below 85°C for the unfinned package is 1.30×10 W.
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a molecule has the molecular formula c3h4cl2 a. calculate the degrees of unsaturation for this molecule. b. using the 1h spectrum below, propose a structure for the molecule. from left to right, the integrations are 5.63, 5.65, 11.28 c. indicate which proton in the molecule belongs to which peak in the nmr spectrum.
Our given molecule is missing 6 hydrogen atoms. Each pair of lost hydrogen atoms is equivalent to one degree of unsaturation in a hydrocarbon.
How do you calculate degrees of unsaturation?Image result for a molecule has the molecular formula c3h4cl2 a. calculate the degrees of unsaturation for this molecule.First, the maximum number of hydrogens possible for a given compound (2C + 2) is calculated and then the actual number of hydrogens present in the compound (H) is subtracted. If this difference is then divided by 2 the answer will be equal to the degrees of unsaturation for the compound.As we are not provided with ¹H-NMR spectrum therefore we can not conclude a single result for the minor chlorination of propane with Molecular formula C₃H₆Cl₂.Hence, we will draw all the possible isomers with molecular formula C₃H₆Cl₂ and predict the ¹H-NMR spectrum for each of them separately.Below is the structures of possible minor products and the NMR spectrum respectively.Possible Product A:
If the minor product formed is 2,2-Dichloropropane then it will give only one singlet peak in NMR spectrum.
Possible Product B:
If the minor product is 1,1-Dichloropropane then it will exhibit two triplets and one multiple as shown in figure.
Possible Product C:
If the minor product is 1,2-Dichloropropane then it will give four peaks in NMR. The extra peak is formed due to two enantiomers about the chiral carbon.
Possible Product D:
If the minor product is 1,3-Dichloropropane then it will exhibit one triplet and one quintet signal as shown in figure.
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11.25 considering the organic compound, classify each of the following transformations, some of which may be unfamiliar, as an oxidation, a reduction, or neither. for those that are oxidations or reductions, tell how many electrons are gained or lost.
The reaction given above is as follows:
CH₄ + Br → CH₃Br
This reaction is categorized under halogenation reaction.
Halogenation reaction refers to a type of chemical reaction that involves the replacement of a halogen atom with another substance wherein the halogen atom ends up as a part of that substance or a compound. In general, during the halogenation reaction, there is usually an addition of one or more halogens to the substance occurs.
Halogenation reaction is the addition of halogen atoms to a π‐bond system. For example, the addition of bromine to ethene produces the substituted alkane known as 1,2‐dibromoethane.
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