The reflux of the micro-scale reaction should be gentle because since solvents are present in small quantities, the reaction might dry up and burn.
What is reflux?
Reflux can be analogous to distillation. The condenser is present in reflux. The solvent boils and gets condensed back to the same flask. The equipment for reflux are RB flask, heat source, condenser and a water bath.
In reflux reactions, the micro-scale reactions use very small amount of solvents and reagents as the name suggests. During the reaction some solvent might boil and leave the reaction vessel. Then the solvent molecules condense below. Higher the condensation ring, lesser solvent present in the reaction.
Therefore, during reflux reactions, the reaction might dry up and burn since the solvent condenses and only few molecules of solvent are present in the reaction mixture. So, the reaction needs to be gently done.
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hydrocarbons are compounds that contain only carbon and hydrogen. combustion of a sample of a particular hydrocarbon gave 5.86 g of co2 and 1.37 g of h2o. what is the empirical formula of the hydrocarbon?
the emperical formula of the hydrocarbons was CH
what is emperical formula?
The simplest whole number ratio of atoms contained in a substance is its empirical formula in chemistry. The empirical formula of sulphur monoxide, abbreviated SO, and disulfur dioxide, abbreviated S2O2, are two straightforward examples of this idea. As a result, the empirical formula for sulphur monoxide and disulfur dioxide, two compounds made of sulphur and oxygen, is the same. Their molecular formulae, which represent how many atoms are present in each molecule of a chemical compound, are different.
It's important to remember that you're dealing with a hydrocarbon in this situation, which is a chemical made up solely of carbon and hydrogen.
As you can see, the byproducts of this combustion reaction are carbon dioxide, CO2, and water, H2O.
As a result, all the carbon that was formerly a component of the hydrocarbon will now be a component of the carbon dioxide. Similar to how all of the hydrogen that originally made up the hydrocarbon is now a component of the water.
This means that you can calculate the initial amounts of carbon and hydrogen in the hydrocarbon by counting the moles of water and carbon dioxide, respectively.
So, for water you have
1.37g x 1mole H2o/18.015 =0.076moles H2o
and for carbon dioxide
5.86g x 1 mole CO2/44.01g=0.133 moles CO2
Now, you know that every mole of water contains 2 moles of hydrogen and 1 mole of oxygen, which means that the reaction produced
0.076moles H2O x 2 moles H1/mole H2O=0.152 moles H
SInce every mole of carbon dioxide contains 1 mole of carbon and 2 moles of oxygen, it follows that the reaction also produced
0.133moles CO2 x 1 mole C/1mole CO2=0.133 moles C
Finally, to find the mole ratio that exists between carbon and hydrogen in the hydrocarbon, divide these values by the smallest one
For C: 0.133moles/0.133moles=1
For H: 0.152moles0.133moles=1.14≈1
The empirical formula of the hydrocarbon will thus be
C1H1⇒CH
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The direct current of 100 milliampere flows for four hours through three cells connected in series. They contain solutions of sodium chloride, copper(ii)tetraoxosulphate(vi) and gold (ii)trioxonitrate(v).Calculate the mass of metal deposited in it cell (Na=23.0,Cu=63.5,Ag=197g/mol,F=96500)
The masses of the solutions are; 0.34 g, 0.95 g and 2.9 g respectively.
What is the mass of the metal that is deposited in each cell?We know that in the process of electrolysis, it is possible that we can be able to deposit a given mass of the metal when we pass a direct current through the solution.
We then have;
Quantity of current passed through each solution = 100 * 10^-3 A * 4 * 60 * 60 = 1440 C
Solution 1;
23 g of sodium is deposited by 96500 C
x is deposited by 1440 C
x = 0.34 g
Solution 2
63.5 g is deposited by 96500 C
x is deposited by 1440 C
x = 0.95 g
Solution 3;
197 g is deposited by 96500
x is deposited by 1440 C
x = 2.9 g
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suppose that an atom has (i) 4, (ii) 5, electrons in different orbitals. what are the possible values of the total spin quantum number s? what is the multiplicity in each case?
The spin quantum number will be 2 and 2.5 and multiplicity in each case will be 5 and 6.
The angular momentum of such an electron is described by its spin quantum number (ms). An electron carries orbital angular momentum in addition to angular momentum around its axis of rotation. The Spin Quantum Number (s) really does have a magnitude (1/2) and a direction (+ or -) since angular momentum would be a vector.
(i) If an atom has 4 electrons then it will have total
Total spin quantum number = 1/2+1/2+1/2+1/2 = 4/2=2
Multiplicity = 2S+1= 2×2+1=5
(ii) If an atom has 5 electrons then it will have
Total spin quantum number = 1/2+1/2+1/2+1/2+1/2 = 5/2 = 2.5
Multiplicity = 2S+1= 2×2.5+1=6
Therefore, the spin quantum number will be 2 and 2.5
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2. if an ir spectrum is recorded for 2 samples using the same sampling method, and the resulting ir spectra are identical, can we say that the two samples are identical (meaning that they are the same chemical compound)? explain your answer. 3. how could you use ir spectroscopy to distinguish between a carboxylic acid and a ketone? 4. how could you use ir spectroscopy to distinguish between an aldehyde and a ketone?
No, we cannot say that if the IR spectrum is recorded for 2 samples using the same sampling method then the resulting IR spectra are not identical.
Because, in general, it means they have the same functional groups but do not that they have the same chemical compound, different molecules have the same functional groups and stereochemistry is not taken into consideration so these compounds can be enantiomers.
The distinction between a carboxylic acid and a ketone using the IR spectroscopy method is that both compounds have C=O but the ketone does not have OH stretch and distinguish between an aldehyde and a ketone using spectroscopy method that compounds have C=O stretch but aldehyde should have C-H stretches between the carbonyl carbon and the aldehydic Hydrogen.
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difference between volume and time.
Answer:
Volume is defined as the space occupied within the boundaries of an object in three-dimensional space. It is also known as the capacity of the object.
Time is the continued sequence of existence and events that occurs in an apparently irreversible succession from the past, through the present, into the future.
Which type of fire can help prevent larger fires in the
future?
ACrown
B Surface
C Ground
Future greater fires can be avoided by putting out ground fires, which are those that burn beneath the surface.
The correct answer is C
Describe ground fire.A ground fire is a particular kind of wildfire that starts underground when fuels like peat, coal, tree roots, or other buried organic debris catch fire and burn. Ground fires may end up burning through the ground's surface and turn into surface fires, depending on the circumstances of the fire.
Why do ground fires start?Plant roots as well as other organic material ignited beneath the soil surface cause ground fires. Surface fires, which burn old or dried vegetation that is laying or growing slightly above the ground, might develop from these fires. On the contrary hand, crown fires consume the tree canopy.
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270g of glucose no.of molecules
Next question: 40g of ammonium nitrate
Question 1. There are [tex]9.025*10^{23}[/tex] molecules in 270g of glucose.
Question 2. There are [tex]3.009*10^{23}[/tex] molecules in 40g of glucose.
Explanation:Question 1. 270g of glucose, no. of molecules.1. Find the chemical formula of glucose.Formula: [tex]C_{6} H_{12} O_{6}[/tex]
2. Find the molar mass of this compound.Using the molar mass of each element, which can be found in the periodic table, we make the following calculations:
Molar mass of C: 12.011 u
Total mass of C in compound: (12.011 * 6)= 72.066
Molar mass of H: 1.008 u
Total mass of H in compound: (1.008 * 12)= 12.096
Molar mass of O: 15.999 u
Total mass of O in compound: (15.999 * 6)= 95.994
Why did we multiply the molar mass of C, H and O by 6, 12, and 6? This is because the formula contains 6, 12, and 6 atoms of each element, respectively.
Add up all masses:
72.066 + 12.096 + 95.994= 180.156 g/mole
This result means that 1 mole of glucose has a mass of 180.156 grams.
3. Calculate the number of molecules.Furthermore, 1 mole of any compound has a total of [tex]6.022*10^{23}[/tex] molecules. To find the amount of molecules, find the amount of moles and then the amount of molecules. Do it in the following fashion:
180.156g -----> 1 mole
270g -----------> x
[tex]\frac{270*1}{180.156} =1.499[/tex]
270 grams of glucose is the equivalent of 1.499 moles of said compound.
Now, find the number of molecules using the amount of moles calculated previously.
180.156g ----> [tex]6.022*10^{23}[/tex]
270g ---------> x
[tex]\frac{(270*6.022*10^{23} )}{180.156} =9.025*10^{23}[/tex]
4. Conclusion.There are [tex]9.025*10^{23}[/tex] molecules in 270g of glucose.
Question 2. 40g of ammonium nitrate, no. of molecules.Repeat the same process explained previously:[tex]NH_{4} NO_{3}[/tex]
N: 14.007 u
N: 14.007 u
O: (15.999 * 3)= 47.997 u
14.007 + 4.032 + 14.007 + 47.997= 80.043 g/mole
80.043g ----> [tex]6.022*10^{23}[/tex]
40g -----------> x
[tex]x=\frac{(40*6.022*10^{23}) }{80.043} =3.009*10^{23}[/tex]
There are [tex]3.009*10^{23}[/tex] molecules in 40g of glucose.
Why does the graph of beta decay have horizontal change while alpha decay graphs change vertical and horizontal?
In alpha decay both the atomic number and mass number of the atom changes. Whereas, for beta decay only atomic number changes. The horizontal change is representing the change in atomic number and vertical change is for mass number.
What is radioactive decay?Radioactive decay is the process of nuclear decay of an unstable radioactive atom by the emission of charged particles such as alpha, beta or gamma to form a stable isotope.
The nuclear decay by the emission alpha particle is called alpha decay in which the mass number decreases by 4 units and atomic number changes by 2 units. Hence the graph of alpha decay shows both vertical and horizontal change.
In beta decay beta particles are emitted where, no change occurs in mass number but atomic number increases by one. Hence, the graph will only shows the horizontal change.
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which confirmatory test will be used for iron (iii) , and which one for nickel (ii)? why was this reagent chosen? should the solution be acidic or basic for this test?
A confirmatory test for iron(iii) is Potassium Ferrocyanide.
The addition of potassium thiocyanate to Fe3+ produces a reddish-brown color due to the formation of this complex. The formation of the reddish-brown color confirms the presence of Fe3+.
The solution should be acidic for this test
A confirmatory test for nickel(ii) is dimethylglyoxime reagent (DMG).
Adding 2 or 3 drops of dimethylglyoxime reagent (DMG) to nickel(ii) will produce a rose-red precipitate of Ni(DMG)2 should form.
The solution should be basic for this test.
What is the confirmatory test for Fe3+?
Fe3+ forms a complex with thiocyanate, SCN−. The addition of potassium thiocyanate to Fe3+ produces a reddish-brown color due to the formation of this complex. The formation of the reddish-brown color confirms the presence of Fe3+.
What is the confirmatory test for Ni2+?
Add dimethylglyoxime(DMG) to the nickel ion solution. Next, add a little bit of ammonia to make the solution basic. It will give a red precipitate. This confirms the presence of Ni2+.
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Which missing item would complete this alpha decay reaction?
The missing item which would complete this alpha decay reaction is: C. ²⁵³Fm₉₈.
The types of radioactive decay.In Science, there are three (3) main types of radioactive decay and these include the following:
Beta decayGamma decayAlpha decayWhat is an alpha decay?An alpha decay can be defined as a type of radioactive decay in which the atomic nucleus of a radioactive element emits an alpha particle, thereby, producing chemical elements that have different atomic nucleus.
During an alpha decay, a radioactive element such as fermium (Fe) with a mass number of 257 would be decreased by four (4) while its atomic number (number of protons) of 100 is decreased by two (2), to produce an isotope and an atom of Helium (⁴He₂), as illustrated in the chemical reaction below:
²⁵⁷Fe₁₀₀ ----> ²⁵³Fm₉₈ + ⁴He₂
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what is the concentration of h3po4 that is needed to neutralize 17.61 ml of 2.869 m naoh when 31.16 ml of h3po4 is used?
The concentration of H₃PO₄ that is needed to neutralize 17.61 ml of 2.869 m NaOH when 31.16 ml of H₃PO₄ is used is 0.540 M.
The balanced equation is given as :
H₃PO₄ + 3NaOH ------> Na₃PO₄ + 3H₂O
number of moles of NaOH = 0.0176 × 2.869
= 0.050 mol
moles of moles of H₃PO₄ needed = 0.050 / 3 =0.0168 mol
molarity of H₃PO₄ = moles / volume in L
= 0.0168 / 0.0311
= 0.540 M
Thus, The concentration of H₃PO₄ that is needed to neutralize 17.61 ml of 2.869 m NaOH when 31.16 ml of H₃PO₄ is used is 0.540 M.
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in the lichen experiment, the metal cations bound to the the lichen disk surface, and the methylene blue dye was leached into the solution question 7 options: true false
False; after coming into contact with metal cations, methylene blue solution leaches out of the lichens. Because they can accept electrons, metal cations are very electronegative.
Methylene, often known as carbene, is an organic molecule having the chemical formula CH 2 that is also formally known as methylidene and hydrocarbon (also written [CH 2]). It is a colourless gas that only persists in diluted form or as an adduct, fluorescing in the mid-infrared range. The most fundamental carbene is methylene.
A lichen is a symbiotic association between many organisms, such as a cyanobacterium or an algae. In addition to being unique from algae, cyanobacteria are also known as blue-green lichen.
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what would be the formula of the solid (precipitate) product that forms when fe2(co3)3 (aq) and mgbr2 (aq) are mixed? (break the compounds into their individual ions before combining to get the products) (all the numbers in the possible answers are subscripts)
Iron bromide will form principate during the reaction.
When cations as well as anions in an aqueous solution combine to generate a precipitate, an insoluble solid, precipitation processes take place.
When target ion concentrations were identical, the ion that forms the poorest soluble compound would precipitate initially (at the lowest counter ion concentration), followed by the other ions as when the solubilities of respective compounds are attained.
When fe2(co3)3 reacts with mgbr2 then it will form iron bromide and magnesium carbonate.
Its chemical reaction can be written as:
[tex]Fe_{2}CO_{3} +MgBr_{2}[/tex] →[tex]FeBr_{3} +MgCO_{3}[/tex]
Here, magnesium carbonate will form ppt because it it will be a insoluble.
That's why it can be said that it will form ppt during the reaction.
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what is the concentration in molarity of lithium hydroxide prepared by dissolving 48.0 grams 48.0 grams of solid in sufficient water to make 250 ml 250 ml of solution?
the concentration of lithium hydroxide in molarity was 8M
what are the properties of lithium hydroxide?
A transparent to water-white liquid with a possible strong odour is what lithium hydroxide solution looks like. Skin, eyes, and mucous membranes may have very irritating contact reactions. Through consumption, inhalation, or skin absorption, it may be harmful. Other compounds are created using it.
Given,
weight =48 g
No. of moles =2448=2 moles
volume =250mL
Molarity Volume (in L)No. of moles=0.25L2=8M
=8M
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why do you add 20% naoh to your hexane diamine (aqueous phase) ? group of answer choices to pull a proton off of the amine. to make the reaction turn colors. to neutralize the hcl formed. to hydrolyze the acid chloride.
When we add 20% NaOH to our hexane diamine which is in aqueous phase, Option C. nylon to neutralize the HCl formed.
The NaOH reacts with the HCl to shape salt and water. This prevents the HCl from inflicting facet reactions, along with the viable addition of HCl to a C=C if one is gift inside the molecule.
The response of adipoyl chloride with 1,6-hexanediamine to shape Nylon 6,6 is used on this test. Nylon 6,6 is consequently a copolymer made by the chemical mixture of specific monomers.The two answers aren't miscible so the reaction can most effective occur on the interface.
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(100 POINTS) Compare the forces between particles solids, liquids, gases
While solids have certain shape and volume, liquids only have definite volume but not shape, gases neither have shape nor volume. The level of energy is highest in gases, medium in liquid and lowest in solids. The compression of solids is difficult, liquids are nearly incompressible, but gases can be easily compressed.
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a 25.00 ml sample of koh is titrated with 21.83 ml of 0.2120 m hcl(aq). what is the concentration of the koh solution?
The molarity or the molar concentration of the KOH solution is 0.18M.
The equation of reaction for KOH and HCl is,
KOH + HCl → KCl + H₂O
As we can see,
Moles of KOH = Moles of HCl.
We also know,
Moles = molarity x volume.
Molarity of KOH x Volume of KOH = Molarity of HCl x Volume of HCl
Volume of KOH is 25 ml.
Molarity of HCl is 0.212M.
Volume of HCl is 21.83 ml.
Putting values,
Molarity of KOH x 25 = 0.2120 x 21.83
Molarity of KOH = 0.18M.
The concentration of KOH solution is 0.18M/.
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Would you expect the equivalence point ph of the wasb to be slightly acidic, neutral, or slightly basic? how does this compare to the sasb equivalence point ph?.
The equivalence point of the WASB would be slightly acidic, while the equivalence point of the SASB would be slightly basic. This is because the WASB has a higher concentration of hydronium ions than the SASB.
The hydronium ion is a key player in acid-base reactions. It is the hydrogen ion that is donated or accepted in an acid-base reaction. The higher the concentration of hydronium ions, the more acidic the solution.
In an acid-base reaction, the acid donates a hydrogen ion to the base. The base accepts the hydrogen ion. This creates a new molecule of water. The equivalence point is the point at which the acid and base have reacted in a 1:1 ratio. At this point, the solution is neutral.
If the acid has a higher concentration of hydronium ions than the base, then the equivalence point will be slightly acidic. This is because there will be more hydronium ions present than there were at the start of the reaction.If the base has a higher concentration of hydronium ions than the acid, then the equivalence point will be slightly basic.
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calculate the value of the maximum velocity for an enzyme-catalyzed reaction that follows michaelis-menton kinetics if the initial velocity is 6 mm/s at a substrate concentration of 6 mm. the km for the enzyme system is 2 mm. a) 4.5 mm b) 8 mm c) 8.75 mm d) 12 mm e) 66 mm
The value of the maximum velocity for an enzyme-catalyzed reaction that follows Michalis Menton kinetics if the initial velocity is 6 mm/s at a substrate concentration of 6 mm. the correct option is (C).
The km for the enzyme system is 2 mm is 8mm. The Michalis-Menten equation is commonly used to study the kinetics of reaction catalysis by enzymes as well as the kinetics of transport by transporters. Typically, the rate of reaction (or reaction velocity) is experimentally measured at several substrate concentration values.
A plot of the reaction rate versus the substrate concentration reveals two important kinetic parameters: Vmax and Km .
Vmax is the maximum reaction rate that is observed at saturating substrate concentrations.
Km is referred to as the Michalis constant and is the substrate concentration at which the reaction rate is exactly half of Vmax.
Km is inversely related to the apparent affinity of the enzyme/transporter for its substrate. Therefore, a low numerical value of Km refers to a very high affinity of interaction between the protein and its substrate.
The Michaelis-Menton equation can be written as -
V = Vmax [S] / (Km + [S])
V is the reaction velocity (rate of reaction progression per unit time)
Vmax is the maximum velocity of the reaction.
[S] is the substrate concentration.
Km is the Michaelis constant.
Here V = 6mm/s
Vmax =?
[S] = 6mm
Km = 2mm
putting into equation,
V = Vmax [S] / (Km + [S])
6 = Vmax [6] / (2 + [6])
6 = Vmax [6] / 8
48/6 = Vmax
Vmax = 8mm
The value of the maximum velocity for an enzyme-catalyzed reaction that follows Michaelis Menton kinetics is 8mm.
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Which selection best describes what granger believes to be the major difference between man and the phoenix?.
The statement best describes what Granger believes to be the major difference between man and the phoenix: that the phoenix recognizes when they have made a mistake and eventually will learn not to repeat it. Meanwhile, although a man recognizes his fault, he will continue to repeat them.
What does Granger say about the men and phoenix comparison?
Phoenix is a mythological creature that would burn itself to death only to be reborn from the ashes. As well as humans, we tend to cyclically destroy ourselves and our societies only to build them up again. Granger hopes that eventually, men will learn the lessons from history and stop destroying society.
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How is a covalent structure formed
What is the outer part (B) of an atom called?
Answer:
B is the outer part atom .
The outermost regions of the atom are called electron shells and contain the electrons (negatively charged). The atoms have different properties based on the arrangement and number of their basic particles.SO the hydrogen atom (H) contains only one proton, one electron, and no neutrons
Explanation:
suppose you need 100 ml of a 0.00046 m solution for an experiment. you are given 10 ml of a 4.6 m stock solution. what is the best method to get the final volume and concentration you need?
Dilute solution is the best method to get the final volume and concentration as we need.
Dilution is "the process of reducing the concentration of a solute in a solution by simply adding more solvent to the solution, eg. water." To dilute a solution, add solvent without adding solute. Adding water to a concentrated solution to achieve the required concentration is a common way to create a solution of a specific concentration. Dilution is the technical term for this process. Dilution can also be achieved by mixing high and low concentration solutions. Stock solutions are often purchased and stored at high concentrations, requiring dilution of the solution as a laboratory procedure. Solutions must be accurately diluted to known low concentrations prior to laboratory use.
Dilution Formula
Dilution is the process of adding solvent to a solution to reduce the concentration of solutes.
molarity = moles of solute / liters of solution
moles of solute = (molarity)(liters of solution)
moles of solute = MV
The initial and final conditions are expressed numerically,
M₁V₁= M₂V₂
In form of concentration equation will write as C₁V₁= C₂V₂
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a solution is prepared by diluting six times with the dilution factor of 1/5. if the final concentration of the serial dilution is 1.4x10-7 m, calculate the original concentration of the solution. (this is often used in biological sample analysis.)
The original concentration of the solution will be 2.1 × 10⁻³ m
What is dilution factor?Dilution factor is the ratio to dilute the stock solution. This can be expressed as the ratio of the volume of the final diluted solution to the initial volume removed from the stock solution.
Differs from dilution factor. Dilution ratio refers to a simple dilution ratio that combines a unit volume of solute with the desired volume of solvent. On the other hand, the dilution factor refers to the ratio between the volume of the initially concentrated solute and the volume of the final diluted solution. Which is DF = Vₙ / V₀
For the given question,
Vₙ = DF × V₀
Where, Vₙ = Final concentration of the serial dilution
V₀ = Original concentration of the solution
DF = Dilution factor
Since the solution is diluted 6 times then
Vₙ = 1/5⁶ × V₀
1.4x10⁻⁷ = V₀/15625
V₀ = 15625 × 1.4x10⁻⁷
V₀ = 2.1 × 10⁻³ m
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does a change in temperature affect the solubility of nh3? if yes, at which temperature would nh3 be most soluble? does pressure change has effect on the solubility of nh3? if yes, at which pressure would nh3 be most soluble?
Yes as the temperature increases the solubility of NH3 will decrease and as we increase the pressure solubility of NH3 increases.
Solubility is defined as the maximum amount of substance that will dissolve in a given amount of solvent at a given or specified temperature. Based on solubility different types of solutions can be obtained. A saturated solution is a solution where a saturated solution is a solution where a given amount of solute is completely soluble in the solution.
Whereas a supersaturated solution are those where solute starts precipitating out after a certain concentration.
Temperature does effect the solubility of NH3 because as the temperature increases the hydrogen bonding also decreases, due to which the NH3 molecules are no longer able to bind to water molecules hence their solubility decreases.
But as we increase the pressure on NH3 molecules the bonding with the water molecules will be higher and therefore the solubility also increases.
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Which examples are possible environmental impacts of flooding? Select the two correct answers. (1 point,
damage to homes
Reduction in tourism and Groundwater recharge are possible environmental impacts of flooding .
What are floods ?
During floods, people need to quickly move themselves and their most valuable possessions to higher ground. Leaving home in search of a safer place is called evacuation. Floods occur at irregular intervals and vary in magnitude, duration and areas affected.
Water flows naturally from high ground to low ground. This means that low-lying areas can flood quickly before they start reaching higher elevations. In rivers, flooding can occur, especially at bends and meanders in the channel, when flow exceeds the bed's capacity. Floods often damage homes and businesses when they are in the natural floodplains of rivers.
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What are both names for the compound HNO₂?
(In the spaces provided, write out the complete names of the compound requested)
The name of this compound when not dissolved is type your answer...
The name of this compound when dissolved in type your answer…
Answer:
Explanation:nitrous acid
serine proteases make use of which strategy among the four general strategies for catalysis? a.catalysis by approximation b. non-covalent c.covalent d. metal ion
One of the four general catalytic methods used by serine proteases is catalysis by approximation.
What is serine proteases?Endo proteases come in several forms, including serine proteases. They are, nonetheless, quite common in both prokaryotes and eukaryotes. Protease A, a chymotrypsin-like protease from Stremptomyces griseus, has a primary sequence very different from chymotrypsin, but its overall tertiary structure is very similar to chymotrypsin.
The positions of the catalytic triad amino acids in the primary sequences of the protein are very similar, indicating that the genes for the proteins diverged from a common precursor gene. B. subtilisin, a serine protease, in contrast, Subtilis shares only a small amount of tertiary structural homology with chymotrypsin. But when folded, it also possesses a catalytic triad (Ser 221 - His 64 - Asp 32) akin to chymotrypsin's (Ser 195 - His 57 - Asp 102).
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2. Which type of intermolecular force accounts for each of
these differences?
a) CH3OH boils at 65°C whereas CH₂SH boils at 6°C.
b) Xe is a liquid at atmospheric pressure and 120 K whereas Ar is a gas under the same conditions.
c)Kr, atomic mass is about 84 amu, boils at 120.9 K, whereas Cl₂, molecular mass about 71 amu, boils at
238 K.
At atmospheric pressure and 120 K, Xe is a liquid, whereas Ar is a gas at the same circumstances.
The right response is B.
What distinct intermolecular forces are there between each other?Intermolecular forces can be divided into three categories: hydrogen bonds, dipole-dipole interactions, and London dispersion forces (LDF). Despite the fact that molecules can have any combination of these three types of intermolecular forces, all substances at least contain LDF.
What are the four distinct intermolecular force types?These are the four principal intermolecular forces: Van der Waals dipole-dipole interactions > Ionic bonds > Hydrogen bonds > forces of Van der Waals dispersion.
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if you close a pressure cooker with the contents at 280k and 1 atm, what is the pressure when the contents are heated up to 406k ?
The new pressure will be 1.45atm.
Ideal gas equation gave a relation between pressure, temperature and volume. It can be expressed as:
PV=nRT
Where, P is pressure, V is volume and T is temperature
The given data:
[tex]T_{1}[/tex] = 280K
[tex]T_{2}[/tex]= 406K
[tex]P_{1}[/tex] = 1 atm
[tex]P_{2}[/tex] = ?
The amount of unknown pressure can be determined by using the formula:
P1/T1=P2/T2....(i)
Now, put the values of given data in above equation.
P2= P1T2/T1
P2=1×406K / 280
P2 = 1.45atm
Therefore, the new pressure will be 1.45atm
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