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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Dinitrogen tetroxide in its liquid state was used as one of the fuels on the lunar lander for theNASA Apollo missions. In the gas phase it decomposes to gaseous nitrogen dioxide:N2O4(g) ↔ 2NO2(g)Consider an experiment in which gaseous N2O4 was placed in a flask and allowed to reachequilibrium at a temperature where Kp = 0.133. At equilibrium, the pressure of N2O4 wasfound to be 2.71 atm. Calculate the equilibrium pressure of NO2(g).
Equilibrium pressure of NO2 (g) is 0.3604. This is calculated from the expression of equilibrium constant.
Dinitrogen tetroxide in its liquid state was used as one of the fuels on the lunar lander. Decomposition of gaseous nitrogen dioxide ,
N2O+ (g) ---> 2NO2 (g)
chemical equilibrium is the state in which both the reactants and products are present in concentrations which have no further tendency to change with time. For this equilibrium reaction, equilibrium constant can be represented as
K(eq.) = concentration of product / concentration of reactant
In gaseous phase we consider the presence of the molecule ,
Kp = [NO2] / [N2O4]
where, Kp = equilibrium constant that equals to 0.133
[N2O4] = Presence of N2O4 at equilibrium that equals to 2.71.
Putting the values in the expression of equilibrium constant,
0.133 = [NO2]2 / 2.71
[NO2]2 = 0.133 * 2.71
= 0.3604
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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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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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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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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 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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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:
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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which of the following are potential safety concerns for this lab? two of the answer choices below are correct...select the two correct answers. (grading note: for this type of question, canvas will award points for correct selections and deduct points for incorrect selections. make sure you are focusing on the safety concerns for this specific experiment.) group of answer choices broken glassware caustic bases (such as naoh) organic solvents (such as acetone or toluene) open flames
Since the flame test in this experiment requires the use of heat. Consequently, two potential risks include glassware shattering during the flame test and open flames. The correct answers are a and e.
What is a flame test?A qualitative test called the flame test is employed in chemistry to help identify or rule out the identity of a metal or metalloid ion present in an ionic compound. A distinctive color that can be seen with the eye may be released if the compound is placed in the flame of a gas burner.
Why do we do flame tests?The flame test is used to visually identify a metal or metalloid ion that is unknown.
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question at position 14 after you collect a fraction from the column, how do you remove the solvent to get the pure compound?
Remove the solvent by rotoevaporation. You should have a flask of free-flowing silica gel that you can pour on the top of your column. Add a layer of sand and elute as usual.
Solvents are a diversified group of chemical compounds that have the ability to water down, disintegrate, or disperse other substances. A solvent's ability to dissolve another molecule is determined by the molecule and physicochemical parameters of the solvent and the solute. Pure compounds are those contain just one type of particle and possess a simple design throughout. Pure compounds involve sugar, salt, and baking soda. Pure compounds include diamonds, protein crystals, and copper sulphate crystals.
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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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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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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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how much would the temperature of 175 g of water increase if 56.5 kj of heat were added? specific heat of water is 4.184 j/g °c.
When. 56.5kJ of heat is added to water of 175g, the temperature will change by 77.2°C
What is specific heat capacity?The specific heat capacity is defined as the quantity of heat (J) absorbed per unit mass (kg) of the material when its temperature increases 1 K (or 1 °C). Specific heat capacity is measured in J/(kg K) or J/(kg °C).
The quantity of heat required is given as H= mc∆T, where m is the mass of substance and ∆T is the change in temperature.
∆T= H/mc
H = 56.5kJ= 56500J
∆T = 56500/(175×4.184)
∆T= 77.2°C
Therefore the temperature change of the water is 77.2°C
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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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How many grams of Al are needed to
produce 0.450 L of 1.6 M solution
of AICI3?
2AI+ 6HCI 2AlCl3 + 3H₂
[?] g Al
taking 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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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:
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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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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What is the pH of a solution that has the same number of hydrogen ions as hydroxide ions?; What is the pH of a solution that has equal concentrations of both hydrogen ions H +) and hydroxide ions OH -)?; What is the pH of a solution with a hydrogen ion?; At what pH does the hydrogen ion concentration equal the hydroxide ion concentration?
The substance or compound has a pH of 7 when it has the same number of hydrogen and hydroxide ions. The pH of pure water, which is 7, is considered to be neutral.
How acidic is a solution with the same quantity of hydrogen ions as hydroxide ions?The hydrogen ion concentration declines and the hydroxide ion concentration rises when pH rises (over 7.0). Both hydrogen ions and hydroxide ions are present in equal amounts when the pH is at 7.0.
When a solution has an equal number of hydrogen and hydroxide ions the solution is?Pure water is the substance that contains an equal number of hydrogen and hydroxyl ions. The quantity of hydrogen and hydroxide ions in pure water is typically comparable to other solvents. Since it is a neutral answer, it has been regarded as being applicable to all situations.
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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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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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Two students titrated a 25.0 mL aliquot of pear juice with 0.17 M NaOH to the phenolphthalein endpoint. The initial buret reading was 0.73 mL and the final buret reading was 18.39 mL.
A.) What was the mass of citric acid in the juice sample?
B.) Calculate the mg of citric acid present per mL of juice.
(A) The mass of citric acid in the juice sample is 0.576g
(B) The mg of citric acid present per mL of juice is 23.08 mg/ml
Sodium hydroxide (NaOH) reacts with acids, thus:
NaOH + H⁺ → H₂O + Na⁺
The volume of titration is: 18.39mL - 0.73mL = 17.66mL
Moles of this volume in 0.17M NaOH are: 0.01766L × (0.17 mol / L) = 0.00300mol NaOH ≡ mol citric acid
Assuming the only acid in pear juice is citric acid-
As molar mass of citric acid is 192.124g/mol.
Mass of citric acid is: 0.00300mol citric acid × (192.124g / mol) =0.576g citric acid .
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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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Which of the following would most likely form an ionic bond? a. carbon and oxygen
b. sodium and fluorine c. sulfur and hydrogen d. phosphorus and oxygen
Fluorine (F) and Sodium (Na) are both nonmetals. They are hence likely to create an ionic connection.
Option b is the correct answer.
Ionic bonds between carbon and oxygen seem to be unlikely.Additionally, the atom's electron affinity is too low and its ionization energy is too high for ionic bonding to take place. Because it contains four valence electrons—half of an octet—carbon, for instance, cannot form ionic bonds.
C and O are they covalent or ionic?The two elements C and O, both of which are non-metallic, are presented in the aforementioned question. They will link together, but it won't be an ionic bond; it will be covalent. C and O do not, therefore, combine to produce an ionic compound.
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Which is a nonpolar molecule containing a polar covalent bond?
Despite having polar bonds, the molecule of carbon dioxide (CO2) is nonpolar. The linear structure of CO2 is. Due to their identical amplitude and opposite polarity, the distinct bond dipoles cancel one another.
Does water have polar covalent connections but is it a nonpolar molecule?A polar covalent molecule is water.
A water molecule has two poles: a positive charge on the hydrogen pole (side) and a negative charge on the oxygen pole due to the unequal sharing of electrons between the atoms and the asymmetrical form of the molecule (side).
Which chemical from the list below has polar covalent bonds? HCl, Co N2, NH3, and NH4+?CO and NH3; NH4+ and HCl; and Polar covalent bonds are present in all of the species.
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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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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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