The fluid that fills the gap between your eye's lens and retina is called vitreous humour (sometimes).
What part of the eye is filled with vitreous humor?The eye is shaped like a round ball with a small bulge in the front.There are three main layers in the eye. These layers, which are flat against one another, combine to form the eyeball.The sclera, a hard, white, opaque membrane, covers the outside of the eyeball. The cornea, a clear, thin, dome-shaped tissue, is what causes the slight bulge in the sclera at the front of the eye.The choroid is in the middle layer. The colored portion of the eye known as the iris is located in front of the choroid. The pupil, a circular opening or hole in the center of the iris, is what gives the eye its visual field.The retina, which covers the rear two thirds of the eyeball, is the inner layer. The sensory retina, which contains nerve cells that process visual information and transmit it to the brain, and the retinal pigment epithelium (RPE), which is situated between the sensory retina and the eye wall, make up the retina.To Learn more about vitreous humour refer to:
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Which statements describe organic compounds? Check all that apply. Organic compounds are commonly found in living things. Organic compounds are not associated with or made from living things. Organic compounds contain carbon. Organic compounds usually lack carbon. Organic compounds are found in food. and whoever could answer this correctly I'll give brainlist to thank you have a nice day
True statements regarding organic compounds are:
Organic compounds are commonly found in living things.Organic compounds contain carbon.Organic compounds are found in food.Organic compound comprises of a large class of chemical compounds in which one or more atoms of carbon are covalently linked to atoms of other elements, most commonly hydrogen, oxygen, or nitrogen.
The basic characteristics of the organic compounds are given below.
Organic compounds contain at least one carbon atom.The carbon atom in the organic compounds form covalent bonds with other elements.Generally, organic compounds have carbon-hydrogen bonds.Organic compounds are found commonly in all living things.Learn more about organic compounds from the link given below.
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which of the following items of information are necessary to calculate the mass percentage of an element in a given compound?
To obtain the percent by mass, we need the molar mass of the compound. Option A
What is the percentage by mass?We know that a compound is composed of so many elements. The amounts of each of the elements that makes up the compound would always vary. We may need to find the mass of the element that is in a compound as it is expressed as a percentage.
If we want to make this kind of calculation, we would need to find out the molar mass of the compound and then we would also have to know the relative atomic mass of the element that is in question.
Thus, the most important things that we need to get the percentage of the element in the compound is the molar mass and the mass of the element.
The formula that we need to use is;
Mass of the element/ Molar mass * 100/1
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What is a pewter pitcher used for?.
These pewter pitchers work great while heated and used as wine decanters, iced tea snifters, and for serving iced water. Every pewter pitcher we sell is produced using same techniques.
They are food safe and free of lead, just like all of our pewter goods. Pewter is a malleable metal alloy that traditionally contains 85–99% tin with the other components being copper, antimony, bismuth, and occasionally, though less frequently now, lead. Heated is also utilized on occasion. The high copper content of this lead-free pewter alloy enables it to produce the finest detail in open face, gravity pour, sand, and cast iron moulids. Heated for good strength. Copper and antimony make up 91–93% of the tin. Around the start of the Bronze Age, the Near East saw the first usage of pewter.
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In another trial the student mixed 0. 10 m na2s2o3 with hydrochloric acid. Calculate the amount of time
The amount of time is 4. 0 s
What is meant by hydrochloric acid ?Acid hydrochloride is an inorganic substance. With the chemical formula HCl, it is a very corrosive acid. Muriatic acid and hydrogen chloride are other names for it. HCl is created when hydrogen chloride is dissolved in water. It's a straightforward diatomic molecule.
An aqueous solution of hydrogen chloride is what is known as hydrochloric acid, commonly referred to as muriatic acid. It has an unmistakably strong odour and is colourless. It is categorised as a powerful acid. In the digestive systems of the majority of animal species, including humans, it is a part of the gastric acid.
[tex]\ln [\mathrm{A}]_t-\ln [\mathrm{A}]_0=-k t \Rightarrow \ln \frac{[\mathrm{A}]_t}{[\mathrm{~A}]_0}=-k t[/tex]
[tex]\begin{aligned}&\ln \frac{\left[\mathrm{S}_2 \mathrm{O}_3{ }^{2-}\right]_t}{\left[\mathrm{~S}_2 \mathrm{O}_3{ }^{2-}\right]_0}=-k t \\&\ln \frac{0.020}{0.10}=\left(-0.40 \mathrm{~s}^{-1}\right)(t) \Rightarrow t=\frac{-1.61}{-0.40 \mathrm{~s}^{-1}}=\mathbf{4 . 0} \mathrm{s}\end{aligned}[/tex]
Therefore the amount of time is 4.0 s
The complete question is : In another trial the student mixed 0. 10 m na2s2o3 with hydrochloric acid. Calculate the amount of time would take concentration of [tex]\mathrm{S}_2 \mathrm{O}_3{ }^{2-}[/tex] to drop to .020 m
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What happens when an atom gains 3 electrons?.
When magnesium (mg2+) and fluorine (f1-) combine in an ionic bond, the resulting formula will be.
When Magnesium (Mg²⁺) and Fluorine (F¹⁻) combine in an ionic bond, the resulting formula will be magnesium fluoride (MgF₂).
Magnesium Fluoride (MgF₂) is formed when magnesium and fluorine react together. The reaction between the two elements is very exothermic and occurs in the solid state.
The reaction is as follows:
Mg (s) + F₂ (g) → MgF₂ (s).
The MgF₂ is a white solid that is insoluble in water. It is a wide band gap insulator with a dielectric constant of about 7.5 and a melting point of 1163°C.
Magnesium Fluoride is used in optical components, particularly as an antireflection coating on lenses, as well as in coatings for solar cells and LCDs. It is also used in the production of specialty ceramic materials.
Therefore, when Magnesium and fluorine combine, it forms Magnesium fluoride.
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a molecule that does not have a dipole moment and in which the central atom is sp3 hybridized will have an electron-domain
The molecule that does not have a dipole moment and in which the central atom is sp3 hybridized will have an electron-domain are CH4 , SF4.
Now coming to the hybridization of methane, the vital atom carbon is sp3 hybridized. This is due to the fact one 2s orbital and 3 2p orbitals withinside the valence shell of carbon integrate to shape 4 sp3 hybrid orbitals which can be of same electricity and form
CH 4 and H 2 O each has sp 3 hybridisation however as there's no lone pair found in CH 4 while in H 2 O there are lone pairs found in water molecule. Therefore form of methane is tetrahedral while water molecule has bent form.
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1. Consider the following gas phase reactions in a Packed Bed reactor. (1) A+B→X
(2) A+B→Y
(3) X+B→Z
r ′ 1A =−800∗exp(−8000/T) ∗ (P A ∧0.75 PB )
r ′ 2B =−10∗exp(−300/T) ∗ (PA∗ PB 2 )
r ′3A =−10000∗exp(−8000/T) ∗ (P X ∗ ∗ P B )
a) Write an expression for the instantaneous selectivity of species
X with respect to species Y and Z
. b) Specify the type of reactor and the conditions to maximize the selectivity to X
An expression for the instantaneous selectivity of species X with respect to species Y and Z Specify the type of reactor and the conditions to maximize the selectivity to X are CFSTR.
1) A +B - X,-r1.4=800*exp(- 8000 T )PA^ 0.75 x PB2) A+B - Y,-r2A=10^ * exp(- 300/T) * P A^ x PBthree) X +B - Z,-r3A=10000*exp(- 8000 T )PX*PB(three)X is fashioned from 1 ^ pi response and decomposed from three response. Selectivity is moles of price of response with admire to favored product to price of response with admire to undesired producttheta(x/(y + z)) =phi( X T+Z )= -r1.d+r3.A -r2.4-r3.A = 800exp(- 8000 T )PA^ e.33 *PB-a thousand erp(- 8000 T )PAPB 10exp(- 300/T) x PAPB + 1000exp(- 8000/T) x pAPB . The equation may be written after putting off PB from numerator and denominator theta(X/(T + Z)) = (800exp(- 8000/T) x P x A ^ (4/three) - 10000exp(- 8000/T) * p, X)/(10exp(- 300/T) * p_ + 10000exp(- 8000/T) * pX).The equation may be written after putting off PB from numerator and denominatorphi(X/(T + Z)) = (800exp(- 8000/T) x p, A ^ (4 + three) - 10000exp(- 8000/T) * p_)/(10exp(- 300/T) x p_ + 1000exp(- 8000/T) * p_)The equation may be written after putting off PB from numerator and denominatorO(X/(T + Z)) = (800exp(- 8000/T) * p_ * A ^ (1/three) - 10000exp(- 8000/T) * pX)/(10erp(- 300/T) * p_ + 10000erp(- 8000/T) * p_)The equation may be written after putting off PB from numerator and denominatorO(X/(T + Z)) = (800exp(- 8000/T) * p_ * A ^ (plus/minus 33) - 10000exp(- 8000/T) * p, X)/(10erp(- 300/T) * p_ + 10000exp(- 8000/T) * p_)O( X T+Z )= 800 exp(- 8000 T )P. A ^ 8.three - 1000erp(- 8000/T) * pX 10*exp(- -8000+7700 T )*p.d+a thousand*exp(- 8000 T )*p.A .O( X T+Z )= 800exp(- 8000/T) * p * A ^ 6.three - 1000erp(- 8000/T) * pX 10*erp( -8000 T )exp( 7700 T )*p A +a thousand^ * exp(- 8000 T )*pX .theta(X/(T + Z)) = (800P x A ^ 0.73 - 10000PX)/(10exp(7700/T) * PA + 10000PX) From the above equation, denominator ought to be as small as possible. The partial strain of B does now no longer have an effect on the selectivity.Hence PX must be smaller. The response is to be executed at excessive temperature in order that the 1 ^ pi.time period withinside the denominator of above equation is less. So CFSTR makes partial strain of A as little as possible.At low Px, the above equation turns into after neglecting the second one time period of numerator and 2 ^ (pi*d) time period of denominator.Read more about reactor :
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Experiment Reaction: An Aldol Reaction: trans-4-Nitrochalcone
Consider the product IR obtained in the lab and pictured below. Note that the sample is showing an unexpected band of OH (where? why?) but the relevant region is clear and accurate.
Identify and assign the carbonyl absorption band in your product spectrum: [ Select ] ["3361", "2360", "1656", "1607", "1513", "1333"] cm-1 [ Select ] ["stretch", "bend"] .
The acetophenone, which is the starting material, has an IR band assigned to its [ Select ] ["hydroxide", "carbonyl", "aromatic ring"] at 1681 cm-1. How this compare with the product carbonyl band that you found in this IR above? The carbonyl in your product is [ Select ] ["the same in cm-1", "at least 10 cm-1 higher", "at least 10 cm-1 lower"] from that of the acetophenone.
The reason for the difference in frequency value for the carbonyl, is that [ Select ] ["the double bond", "the OH", "the aldehyde"] creates an additional [ Select ] ["enolization", "conjugation", "localization"] which [ Select ] ["increases", "lowers"] the frequency of the C=O band.
The alpha, beta – unsaturated system in the final product results from the elimination of [ Select ] ["water", "nitro", "HCl"] in the last step of the reaction.
The carbonyl absorption band in your product spectrum is 1656 [tex]cm^{-1}[/tex].
How does aldol become made?A was the or enolate ion reacts with such a carbonyl chemical to create a -hydroxyaldehyde and -hydroxyketone, which itself is subsequently dehydrated to create a conjugated enone. This is an example of an endothermic reaction in organic chemistry.
What is a direct aldol reaction?The redirected aldol reaction is a kind of regular crossing aldol reaction. Using LDA, the enolate is made from one carbonyl molecule. The other carbonyl molecule is accordingly the electrophile. Even though there are alpha hydrogens for both locations, just one of the elements is an enolate because it is made with LDA.
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what is true for ideal gases at stp conditions? select all that apply. select all that apply: the standard molar volume is 22.4l. all gases have the same mass. all gases have the same reactivity. one mole of any ideal gas has the same volume.
The statement which is true for ideal gases at stp conditions is: one mole of an ideal gas has a volume of 22.4L which is also known as standard molar volume.
What are ideal gases?
The term ideal gas refers to a virtual gas composed of molecules that obey some rules.
Ideal gas molecules do not attract or repel each other. The only interactions between ideal gas molecules are elastic collisions when they collide with each other or with the walls of the container.
Ideal gas molecules take up no volume by themselves. Gases occupy volume as their molecules expand into large regions of space, but ideal gas molecules are approximated as point particles that have no volume of their own.
What is the molar form of the ideal gas law?
Ideal gas pressure, P, volume V, and temperature T are related by a simple equation called the ideal gas law. The simplicity of this relationship is an important reason why we usually treat gas as ideal unless there is another reason.
PV=nRT
where, P is the pressure of the gas, V is the volume occupied by the gas, T is the temperature of the gas, R is the gas constant, and n is the number of moles of gas.
The statement which is true for ideal gases at stp conditions is: one mole of an ideal gas has a volume of 22.4L which is also known as standard molar volume.
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The osmotic pressure of a solution formed by dissolving 25.0 mg of aspirin (c9h8o4) in 0.250 l of water at 25°c is ________ atm.
The osmotic pressure of an aspirin solution formed by dissolving 25.0 mg of aspirin (C₉H₈O₄) in 0.250 l of water at 25°C is
The osmotic pressure is calculated as
π=i×M×R×T (i)
Where, i-van't hoff factor
M-Molarity
R=0.08206 Latm/molK
T=25°C
=25+273=298K
For a molecule C₉H₈O₄, the value of i is 1 as it is a non-electrolyte. We need to find out the molarity of the solution which is
Molarity=moles/volume in L
First calculate moles of C₉H₈O₄. The molar mass of C₉H₈O₄ is
Molar mass = [(9×12)+(8×1)+(4×16)] g/mol
=(108+8+64) g/mol
=176 g/mol
moles=25.0 mg×(1 g/1000 mg)×(1 mol/176 g)
moles=(25.0 mol/176×1000)
moles=(25.0 mol/176000)
moles=0.0001420 mol
The molarity of a solution is
Molarity(M)=0.0001420 mol/0.250 L
=0.000568 mol/L
Plug all values in equation (i)
π=1×(0.000568 mol/L)×(0.08206 Latm/molK)×298K
π=0.01389 atm
π=0.0139 atm
Therefore, the osmotic pressure of an aspirin solution is 0.0139 atm.
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During lab, a student mixed 25 mL of 1.0 M H3PO4 with 75 mL of 1.0 M NaOH. Using the equation below, determine how many moles of reaction the student performed give your answer to 2 sigfigs. H3PO4 (aq) + 3 NaOH(aq) + Na3PO4 (aq) + 3 H20 (1) moles of reaction The intial temperature of both the acid and the base were 22.6 °C, but they rose to 28.2 °C during the reaction. If the calorimeter constant was 78.5J/°C, what was qrxn in J? Give your answer to 3 sigfigs, and watch your signs! Using your answers above, what was the reaction enthalpy, AHxn, in kJ per mol reaction? Give your answer to 2 sigfigs, and watch units! kJ/mol of reaction
3 moles of NaOH required to make 1 mole of Na3PO4 in the given reaction.
H3PO4(aq) + 3NaOH(aq) ⇄ Na3PO4 (aq) + 3H20
Quantifying the quantity of a material is made easier with the aid of the mole concept. It is understood that even a single gram of a pure element has a sizable number of atoms when dealing with particles at the atomic (or molecular) level. In this regard, the mole notion is frequently utilized. The "mole," which is a count of a large number of particles, is the most commonly used unit of measurement.
The letter "NA" is often used to indicate the value 6.02214076*10^23, commonly known as the Avogadro constant. Atoms, molecules, monoatomic and polyatomic ions, as well as other particles, are among the elementary things that may be represented in moles (such as electrons).
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Is melting chocolate in your hand conduction?.
Yes melting chocolate in hand is a process of conduction.
Conduction can be understood as the process, which usually enables direct transfer of heat through the matter, this happens due to the difference in temperature, between adjacent parts of the object. It happens when the temperature of the molecules present in a substance increase, resulting in vigorous vibration. The molecules collide with surrounding molecules, making them vibrate too, which results in the transportation of thermal energy to neighboring part of the object.
In simple terms, whenever two objects are in direct contact with one another, there will be a transfer of heat from the hotter object to the colder one, this happens due to conduction.
Chocolate candy in your hand will eventually melt as the heat from your body is released and makes the chocolate to be melted. This is due to conduction.
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a chemist adds of a barium chloride solution to a reaction flask. calculate the millimoles of barium chloride the chemist has added to the flask. be sure your answer has the correct number of significant digits.
The millimoles of barium chloride the chemist has added to the flask will be 2.6 x 10² mmol.
Volume of barium chloride (BaCl₂) = 425.0 ml
Molarity of BaCl₂ = 0.62 M
Number of mmol = ?
Calculate the number of mmol by using the following formula:
Molarity = moles (solute) / Volume (solution) in liter
As we have to find the number of mmol so rearrange the equation for mmol.
millimoles (solute) = Molarity x Volume (solution) in mL
millimoles of BaCl₂ = Molarity of BaCl₂ x Volume (solution) in mL
Put the values in the above equation.
mmol of BaCl₂ = 0.62 M x 425.0 mL
mmol of BaCl₂ = 0.62 mol/L x 425.0 mL
mmol of BaCl₂ = 263.5 mmol
mmol of BaCl₂ = 2.6 x 10² mmol
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write the electron configurations for the following ions using spectroscopic ( spdf) and orbital box notation. (a) k full electron configuration
Knowing the number of electrons in the K atom is necessary before we can write the potassium octet (there are 19 electrons).
What is an electron example?The electron, the smallest constituent part of an atom, has a negative electrical charge .Protons and electrons each occurs in similar numbers in neutral atoms. One atom and one proton are all that the hydrogen atom has. On the other hand, the uranium atom possesses 92 protons, which means 92 electrons.
Why are there electrons in atoms?The electrons are an atom's negatively charged building blocks. The total negative charge of an atom's electrons counteracts the charge of its protons in the elementary particle.
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What are the impacts of oxygen revolution?.
Thus, changes in the composition of the earth's atmosphere, the emergence of aerobic metabolism, and finally the development of multicellularity were all brought about by cyanobacteria's release of oxygen.
Where is the oxygen?Oxygen is a chemical element, a type of substance, due to its unique atom composition. The atomic number 8 of an oxygen atom, which is represented by the symbol O in its formal chemical formula, indicates that the oxygen atom contains eight protons in its nucleus.
Which is oxygen—air or a gas?All living things require oxygen, which is a clear, flavorless cloud of gas. Animals swallow it, which they subsequently transform into carbon dioxide, which plants utilize to produce new carbon and release oxygen.
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Nitric acid (HNO3) is a component of acid rain that forms when gaseous nitrogen monoxide pollutant reacts with gaseous ozone (O3) and liquid water to form aqueous nitric acid. Enter a balanced chemical equation for this reaction. Express your answer as a chemical equation. Identify all of the phases in your answer.
Nitric acid would be the end product of this reaction, which uses nitrogen dioxide, oxygen, and water as reactants.
How nitric acid is formed in acid rain equation?For this reaction, the reactants are nitrogen dioxide, oxygen and water while the product would be nitric acid. The chemical equation would be written as:
NO2(g) + O2(g) + H2O(l) --> HNO3(aq)
This can be a complete equation when the elements are balanced in each side.
4NO2(g) + O2(g) + 2H2O(l) --> 4HNO3(aq)
Therefore, when Nitric acid is a component of acid rain that forms when gaseous Nitrogen dioxide pollutants react with gaseous Oxygen and liquid water to form aqueous Nitric acid as 4 N O 2 ( g ) Nitrogen dioxide + O 2 ( g ) Oxygen + 2 H 2 O ( l ) Water → 4 HN O 3 ( aq ) Nitric acid .
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a certain amount of chlorine gas was placed inside a cylinder with a movable piston at one end. the initial volume was 3.00 l and the initial pressure of chlorine was 1.45 atm . the piston was pushed down to change the volume to 1.00 l . calculate the final pressure of the gas if the temperature and number of moles of chlorine remain constant.. (figure 1)
4.95 atm is the final pressure of the gas if the temperature and number of moles of chlorine remain constant.
Temperature and Number of Moles are constant
=> PV=k
P1*V1 = P2*V2
V1=3.00 L and P1 = 1.45 atm
V2=1.00 L P2 = ?
so P2 = P1*V1 / V2
= 4.35 atm
a gas or gaseous mixture for fuel or illumination; a fluid (such as air) that neither has independent form nor volume but has a tendency to expand endlessly. in particular: natural gas, a gaseous byproduct of digestion. the discomfort this has caused. A gas is a type of material that has neither a definite volume nor form. Air, water vapor, and helium are a few examples of gases. A material that has neither a definite volume nor form is called a gas. A gas therefore assumes the form and volume of its container. The force perpendicularly applied to an object's surface divided by the area over which it is dispersed is known as pressure. The pressure as compared to the surrounding air pressure is known as gauge pressure. To express pressure, a variety of units are employed.
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How is climate change affecting the Northern Hemisphere?.
What is the valence shell of hydrogen?.
Are amino acids equivalent to proteins?.
A protein is a chain of amino acids linked together by peptide bonds.
Protein is observed in the course of the body—in muscle, bone, skin, hair, and absolutely every different frame component or tissue. It makes up the enzymes that energy many chemical reactions and the hemoglobin that contains oxygen for your blood.
Proteins are big, complicated molecules that play many critical roles in the body. They do the maximum of the work in cells.
The constructing blocks of proteins are amino acids, which can be small natural molecules that encompass an alpha (critical) carbon atom linked to an amino organization, a carboxyl institution, a hydrogen atom, and a variable issue called an aspect chain.
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the oxidation of propan-1-ol with acidified potassium dichromate with distillation will produce . the oxidation of propan-1-ol with acidified potassium dichromate heated under reflux will produce . enter the iupac name of the products in the boxes (not the formula or class name, e.g ethane and not c2h4 or 'alkene').
It is a tertiary alcohol, 2-methylhexan-2-ol. Furthermore, oxidation the reaction of and acid medium produces chromic acid via the following reaction:
Because chromic acid is a strong oxidant, an oxidation-reduction reaction will occur. However, in this case. We have secondary alcohol. Primary alcohols are converted to aldehydes, which are then converted to carboxylic acids. Secondary alcohols are oxidized to ketones, whereas tertiary alcohols are not oxidized due to a lack of hydrogens on the carbon bonded to the "OH" group.
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is the solution for mimo control design using the cyclic method explained in the lecture note isunique? why?
The mimo control design using the cyclic method is unique beacuse,
An algebraic framework is used to illustrate the design and implementation of cyclic control, which includes Iterative Learning and Repetitive Control, for linear MIMO systems. The algebraic framework is frequently utilised in the construction of Iterative Learning Control and is also well suited for Repetitive Control. By diagonalizing the system matrix, the algebraic framework enables illustrative analysis and direct pole placement design of CC for SISO systems. MIMO systems can also be handled using this framework. However, a straightforward application of SISO designs for MIMO systems is not recommended. In most cases, this strategy will not result in control variable decoupling. This study describes a decoupling cyclic MIMO control architecture. The design and execution are carried out using a linked biaxial material testing equipment.Hence above answer is a correct answer.
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a sealed gas, initially at 5.00 atm and 5.00 l, expands to a volume of 10.00 l. what is the new pressure of the gas, assuming constant temperature?
The new pressure of the gas, assuming constant temperature is 2.50atm.
What is atmospheric pressure?
When gas particles in the atmosphere of the Earth collide with other things, the pressure that results is known as atmospheric pressure. The tool used to gauge atmospheric pressure is called a barometer. An evacuated tube is inserted into a container of mercury to create a classic mercury barometer.
What is total pressure?
A mixture of gases' total pressure is equal to the sum of its constituent gases' partial pressures. We can formulate a formula for the total pressure of a combination of two ideal gases, A and B.
Given temperature constant so it is isothermal process.
Given Pressure (P1) = 5atm, P2=?
Volume (V1)= 5L, V2= 10L
We know for isothermal process P1V1= P2V2
==> 5×5 = P2× 10
==> P2 = 25/10= 2.50atm
So the correct answer is 2.50atm.
Therefore, new pressure of the gas, assuming constant temperature is 2.50atm.
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Identify ways in which polysaccharides are covalently attached at their reducing ends to glycoproteins and draw chemical stucures representative of these sugar-protein linkages.
Some types of polysaccharides include starch, cellulose, and glycogen.Polysaccharides are stabilizers and dietary fiber added to foods in the food business.
How do you identify a polysaccharide?One or more covalently linked GAG chains are connected to the core protein of proteoglycans .An amino sugar (either GlcNAc or GalNAc) and a uronic acid make up the linear polysaccharides known as GAGs (GlcA and IdoA).Almost every mammalian cell makes proteoglycans, which are then either secreted into the ECM, inserted into the plasma membrane, or stored in secretory granules.The matrix proteoglycans consist of type IX collagen in proteoglycan form, one or more members of the aggrecan family of proteoglycans, tiny interstitial proteoglycans (decorin, biglycan, and fibromodulin), and others (aggrecan, brevican, neurocan, or versican).These proteoglycans range in size from those with just one GAG chain (such as decorin) to those with more than 100 chains (e.g., aggrecan).GAGs are frequently found in the matrix proteoglycans.To learn more about polysaccharides refer
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a student was synthesizing aspirin in the laboratory. using the amount of limiting reactant, she calculated the mass of aspirin that should form as 11.74 g. when she weighed her aspirin product on the balance, its mass was 2.63 g. calculate the percent yield for this synthesis.
If the student was synthesizing aspirin in the lab and she calculated the mass of aspirin that should form as 11.74 g and when she weighed her aspirin product on the balance which was 2.63 g. The percent yield can be 22.4 %.
The amount of a product received from a reaction is indicated by the percent yield.
The theoretical yield is given, which is 11.74 g and the actual yield is given which is 2.63 g.
Now, we use the formula of the percentage (%) yield,
percentage (%) yield = [tex](\frac{ Actual yield }{ Theoretical yield } )[/tex] × 100
% yield = [tex](\frac{2.63}{11.74})[/tex] × 100
% yield = 22.4 %
So, the percentage (%) yield is 22.4 %.
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Arrange the following compounds in increasing order of their acid strength: Propan-1-ol, 2, 3, 6 - trinitrophenol, 3-nitrophenol, 3. 5-dinitrophenol, phenol, 4-methyl phenol.
Propan-1-ol, 4-methylphenol, 3-nitrophenol, phenol, 3, 5-dinitrophenol, and 2, 3, and 6-trinitrophenol are listed in increasing order of acid strength.
Which has the most acidity?What acid has the most strength? Fluoroantimonic acid is actually a blend of hydrofluoric acid and pentafluoride antimony, making carborane superacids the strongest solar acids in the world. The pH level of carborane is -18.
Which of the following acids has the greatest Mcq value for acidity?Acid o-nitrobenzoic ,Nitrophenol and m-nitrobenzoic acid are two related compounds. Solution: O-nitrobenzoic acid has the highest acid strength due to the nature of the -'NO (2)' group, which withdraws electrons, and the "ortho effect."
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in order to prepare a 1:5,000 (w/v) solution from 20 ml of a 1:200 (w/v) solution, the pharmacist should add how many ml of diluent?
Add 0.1 liters of the stock solution to 19.9 liters of diluent (20 liters - 0.1 liters).(C1) (V1) is (C2) (V2) where C1 is the concentration of the beginning solution is the formula for determining a dilution.
How do you determine how much water you need to diluted a solution?(C1) (V1) = (C2) (V2) where C1 is the concentration of the beginning solution is the formula for determining a dilution.
The initial solution's volume is designated as V1.
The final solution's concentration is C2.
The final solution's volume is V2.
Implementing Dilution Factors
Example: Prepare a 1:200 dilution in 20 L.
Final Volume/Solute Volume = DF, according to the formula.
Enter these numbers: (20 L) / Solute Volume = 200.
Justify: Solute Volume = 20 / 200 = 0.1 l.
Add 0.1 liters of the stock solution to 19.9 liters of diluent (20 liters - 0.1 liters).
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What is unique to group 18 nonmetals?.
Noble gases are a subset of nonmetals in group 18 that are frequently referred to as chemically inert because of their lack of color, odor, and high degree of reactivity. Helium, neon, argon, krypton, xenon, radon, and the man-made element oganesson are all members of this category.
What are noble gases ?The noble gases are a group of chemical elements that share several characteristics. They are all monatomic, odorless, and colorless gases with relatively little chemical reactivity under normal conditions. Helium, neon, argon, krypton, xenon, and radioactive radon are the six types of noble gases that are found in nature.
In order of mass, the noble gases are helium, argon, krypton, xenon, and radon. They are known as noble gases because of how beautiful they are and how little they generally react with anything. For this reason, they are often referred to as inert gases.
Thus, noble gases have a stable configuration . Group 18 elements don't form many compounds, since they are gaseous and chemically inert.
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what is the total number of valence electrons in the lewis structure of no2-? 18 electrons feedback area correct correct 2 question content area draw a lewis structure for no2-.
For the NO2⁻ Lewis structure, calculate the total number of valence electrons for the NO2⁻ molecule. After determining that how many valence electrons there are in the NO2⁻ , place them around the central atom to complete the octets of electrons.
There are a total of the 18 valence electrons for the Lewis structure for NO2⁻ .Nitrogen is the least electronegative atom in the NO2⁻ Lewis structure and therefore goes in the center of the structure of electrons.
In order to make sure that the outer shell of the Nitrogen (N) atom is full you will need to form a double bond with one of the Oxygen (O) atoms in the Lewis structure.
Also note that you should put the NO2⁻ Lewis structure in brackets with as 1⁻ on the outside to show that it is an ion with a negative one charge.
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