The type of protein molecules that is been used to digest food in the organism are:
chymotrypsin trypsin .The organelle where energy from nutrients is released is the Mitochondria.
One inference that can be made concerning a cell that has many of these organelles is that te utilization of the energy is balanced.
What is the organelle where energy from nutrients is released?The organelle where energy from nutrients is released is the Mitochondria , this organelles can be described as the one that look tiny inside cells and this is very essential in the cell because it helps in the p[roces of releasing energy from food.
It should be noted that this process is been refferd to as process of cellular respiration and this is the reason why the biologist do referred to mitochondria as the powerhouses of the cell because it involves the use of energy.
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copper(i) iodide (cui) is often added to table salt as a dietary source of iodine. how many moles of cui are contained in 1.00 lb (454 g) of table salt containing 0.0100% cui by mass?
Copper(i) iodide added to table salt as a dietary source of iodine. 0.238mm of CuI are contained in 1.00 lb (454 g) of table salt containing 0.0100% CuI.
What is molar mass?Mass per mole is a definition of molar mass. Molar mass is the total mass of all atoms in substance that makes up a mole. It is measured in gram-per-mole units.
In the case of single elements or individual atoms, the molar mass is just the element's mass given in atomic mass units. Atom's atomic mass and molar mass are exactly equal.
Given,
Mass of table salt is 1.00 lb = 454 g
Copper(I) Iodine (CuI) present in the table is 0.0100% by mass or
CuI present in the 1 pound of salt = 0.01% of 454 g = 0.0454 grams
Now,
Molar mass of CuI = 63.54 grams + 126.90 grams
Molar mass of CuI = 190.44 grams
∴ number of moles of CuI present in 1 pound salt = Mass / Molar mass
Moles of CuI= 0.0454 / 190.44
Moles of CuI = 2.38 × 10⁻⁴ moles
Moles of CuI = 0.238 millimoles
∴ Moles of CuI present is 0.238mm.
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Which property would cesium most likely have?
It is hard.
It is ductile.
It is a gas.
It has low reactivity.
Answer:
It is ductile.
Explanation:
Cesium belongs to group 1 on the periodic table, meaning it is an alkali metal, not a gas. Alkali metals are soft, malleable, and ductile. They are good conductors of heat and highly reactive in nature, meaning cesium is also highly reactive. Therefore, the only option that would make sense is "It is ductile."
what absorbance did you record for spinach at 400 nm?6.25 points question 2what absorbance did you record for spinach at 420 nm?6.25 points question 3what absorbance did you record for spinach at 440 nm?
It was discovered that the photosynthetic pigment in spinach best absorbed light between the wavelengths of 400 and 450 nm as well as at 650 nm. Additionally, it was discovered that this green phototroph barely absorbed light at wavelengths about 550 nm.
What is Absorbance ?The logarithm of the ratio of incident to transmitted radiant power through a sample is known as absorbance. As an alternative, absorbance can be defined as "the negative logarithm of one minus absorptance, as measured on a homogeneous sample," for samples that scatter light.
The opposite of transmittance, or absorbance (A), indicates how much light the sample absorbed. Additionally known as "optical density." A logarithmic function of T is used to compute absorbance: A = log10 (1/T) = log10 (Io/I).The concentration of the molecule (C) and the sample's path length (L), which is typically equal to the cuvette's path length, combined make up the three factors that affect an absorbance value. The extinction coefficient () is the next factor.What is the absorbance of Spinach ?The disks will rise as a result of bubbles developing on their surface when the leaves create oxygen. The leaves eventually sink if the cup's light source is taken away.
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how many milliliters of a 12% (v/v) propyl alcohol solution would you need to obtain 4.5 ml of propyl alcohol
38.1 ml of a 12% (v/v) propyl alcohol solution would need 4.5 ml of propyl alcohol.
What purpose does the isopropyl alcohol solution serve?
A transparent liquid known as propyl alcohol is frequently used to destroy germs (antiseptic).When carbon monoxide and hydrogen are used to create methanol (methyl alcohol), normal (n-) propyl alcohol is produced as a byproduct. Fusel oil contains it as well.As a rubbing alcohol antiseptic, isopropyl alcohol is combined with water. Additionally, it's a component of hand lotions, aftershave products, and other cosmetics. It is employed in industry as a low-cost solvent for gums, shellacs, drugs, cosmetics, and denatured ethanol.To learn more about propyl alcohol, follow the link https://brainly.com/question/29219081
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which statement best describes groups and periods of the periodic table? select one: a. groups are vertical columns, while periods are horizontal rows. b. groups are mostly nonmetals, while periods are mostly metals. c. groups are horizontal rows, while periods are vertical columns. d. periods have similar properties, while the properties of groups gradually change.
The correct statement is "groups are vertical columns, while periods are horizontal rows".
The chemical elements are shown in tabular form on the periodic table, sometimes referred to as the periodic table containing the elements. It is frequently used in physics, chemistry, and some other sciences, and thus is frequently regarded as a symbol of chemistry.
The Periods were the horizontal rows of the periodic table. The periodic table contains seven distinct periods in all. They have the same amount of electron shells and thus are symbolized by the exact overall number of valence electron.
In a periodic table, the horizontal rows were known as periods, while the vertical columns were known as groups.
Therefore, the correct answer will be option (a).
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Answer:
groups are vertical columns, while periods are horizontal rows
Explanation:
given the table below that shows student's examples of proposed models of the atom: which model correctly describes the locations of protons and electrons in the wave-mechanical model of the atom?
The model accurately depicts where protons and electrons are in the wave. The proton is in the nucleus and the electron is where it is most likely to be. This is the mechanical model of the atom.
The electron was expected to move in circular orbits according to the Bohr model. On the other hand, orbitals are used in the wave mechanical model to characterise the electron positions. The two are not the same. Protons are located inside the nucleus in the wave mechanical model of an atom, but electrons are present where they are most likely to be.
A subatomic particle with a negative charge is an electron. A subatomic particle having a positive charge is called a proton. The strong nuclear force holds protons together in the nucleus of an atom. A type of subatomic particle without charge is the neutron (they are neutral).
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The box shows the element helium as it appears in the periodic table. He Helium 4.0 Which list gives the correct numbers of subatomic particles for a neutral atom of helium?
A. Two protons, four neutrons, six electrons
B. Two protons, two neutrons, two electrons
C. Two protons, two neutrons, four electrons
D. Four protons, four neutrons, four electrons
The correct numbers of subatomic particles for a neutral atom of helium are C) Two protons, two neutrons, four electrons
What are subatomic particles ?
Any of the multiple self-contained units of matter or energy that are the building blocks of all matter are considered subatomic particles, also known as elementary particles. They include the heavier constituents of the small but extremely dense atom's nucleus, the positively charged protons and the electrically neutral neutrons, as well as the electrons, the negatively charged, nearly massless particles that still make up the majority of the atom's size. The only known subatomic particles, however, are not these fundamental atomic building blocks.
These particles are frequently referred to as subatomic particles since they are the building blocks of atoms. There are protons, neutrons, and electrons, three types of subatomic particles. Protons and electrons, two of the subatomic particles, each have an electrical charge of one or the other.
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What is the product of the reaction between
Aluminum and lodine?
12 (iodine gas)?
Answers:
Aluminium Iodide
(AlI³)
a five part per million standard has a percent transmission on a spectrometer of 34.780. what is the absorbance?
The absorbance of the sample with 34.780 percent transmittance is 3.54
What is transmittance?
Transmittance is the fraction of the incident light which passes through the sample and comes out successfully. In spectrometer, the detector detects the amount of light coming out of the sample and converts the reading into digital display. Absorbance is the fraction of the light which is being absorbed by the given sample.
The absorbance of the sample is,
A = 2 - log (-% T)
where, A = absorbance, %T = transmittance
A = 2 - log (-34.780) = 2 - (-1.54) = 3.54
Therefore, the absorbance of the sample having 34.780 percentage transmittance is 3.54.
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Is a Covalent bond stronger than an Ionic Bond?
Answer:
yes
Explanation:
because of the close sharing of pairs of electrons
Because of the close sharing of pairs of electrons (one electron from each of two atoms), covalent bonds are stronger than ionic bonds.
Explanation:Ionic bonds are formed by the complete transfer of electrons and covalent bonds are formed by sharing of electrons. The force between ionic bonds is electrostatic force, while that in covalent bonds is Van der Waals force. Generally, ionic bonds are much stronger than covalent bonds. In ionic bonds, there is a complete transfer of electrons between elements to form a stable compound. While in a covalent bond, there is only sharing of electrons between two elements to form a stable compound. The force that keeps the ions together is the electrostatic force and the force that keeps the elements together bonded with covalent bonds is the Van Der Waals force. As there is a complete transfer of electrons in ionic bonds, cations and anions are formed. Thus there exists a huge electrostatic force of attraction between these ions.
suppose that 0.250 mol of methane, ch4(g) , is reacted with 0.400 mol of fluorine, f2(g) , forming cf4(g) and hf(g) as sole products. assuming that the reaction occurs at constant pressure, how much heat is released?
The heat released after the reaction is -184.79 kJ
The chemical reaction between methane and fluorine is
[tex] CH_{4}[/tex] + 4[tex] F_{2}[/tex] -> [tex] CF_{4}[/tex] + 4HF, where reactants are methane and fluorine. The products are carbon tetrafluoride and hydrogen fluoride.
The limiting reactant is hydrogen fluoride. Number of moles = (0.440 × 4)/4, here 4 is the number of moles of hydrogen fluoride and fluorine
Performing multiplication and division
Number of moles = 0.440 moles of HF
Enthalpy of reaction = -1679.54 kJ
Heat released = (0.440 × -1679.54)/4
Performing multiplication and division to find the heat released
Heat released = -184.749 kJ
Thus, the heat released is -184.79 kJ
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what type of evidence have scientists collected and studied from deep ice cores that shows a correlation between changes in global climate with methane and carbon dioxide levels?
A correlation between changes in global climate with methane and carbon dioxide levels is Variations in ice layer color and thickness.
Ice cores provide direct information about how greenhouse gas concentrations have changed in the past, and also provide direct evidence that climate can change rapidly. By examining the gas trapped in the ice core, scientists learned the amount of carbon dioxide for the first time.
Global temperature has been associated with at least the last million years of Earth's history. A particularly powerful correlation technique is to use the composition of atmospheric gases trapped in ice bubbles. Since most gases remain in the atmosphere long enough to be well mixed on a global scale, ice cores around the world simultaneously exhibit the same atmospheric composition with trapped gas bubbles.
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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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what is the stock system name for N2O3, CO, SO3
Answer:
N2O3= Dinitride Trioxide
CO= Carbon Oxide
SO3= Sulfide Trioxide
Explanation:
Di= 2
Tri= 3
15) in ketose sugars, ring formation can occur because the ketone group reacts reversibly with a hydroxyl group in an aqueous solution. this process is termed . a) hemiacetal formation b) hemicarbation c) mutarotation d) a and c only e) a and b only
in ketose sugars, ring formation can occur because the ketone group reacts reversibly with a hydroxyl group in an aqueous solution. this process is termed " mutarotation".
A shift in the homeostasis between distinct anomers inside the solution causes mutarotation, which is a variation in the specific rotation with plane-polarized light. A hemiketal and hemiacetal group is required for any molecule to exhibit mutarotation. The earliest known example of mutarotation occurred in sugar.
When the matching stereocenters likely to recidivate, the equilibrium among two anomers changes, causing the optical rotation to change. This is known as mutarotation. The interconversion of the and anomeric forms causes the rotation of cyclic sugars.
Therefore, the correct answer will be option (C)
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Ignoring sign which transition is associated with the greatest energy change?
N=1 to n=3
N=3 to n=5
N=2 to n=1
N=3 to n=2
According to the given statement The transition from n=1 to n=3 results in the largest energy change.
How do you calculate energy change?Energy change Equals energy in Minus energy out. To calculate the energy transfer for a reaction, add the bond energy for all the atoms in the reactants (this is the "energy in") and the bond values for all the bonds with in products (this is the "energy out").
What causes energy to change?Energy is capable of changing its forms. For instance, electrical energy transforms into thermal and light heat when a lightbulb is turned on. A automobile transforms the gasoline's molecular bonds' stored energy into a variety of other forms. Chemical energy is converted to light in the engine through a chemical reaction.
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A climatograph of the Western Sahara is depicted here which shows the average rainfall, low and high temperatures over the course of a year. Which features of the Earth most directly contribute to the climate observed in the Western Sahara? Select ALL that apply.
A The convection currents in the atmosphere deposit warm, dry air at the latitudes that contain the Western Sahara.The convection currents in the atmosphere deposit warm, dry air at the latitudes that contain the Western Sahara.
B The tilt of the Earth on its axis gives the Western Sahara direct sunlight during the summer.The tilt of the Earth on its axis gives the Western Sahara direct sunlight during the summer.
C The gravitational pull of the Moon on the Earth diverts water from desert areas to the oceans.The gravitational pull of the Moon on the Earth diverts water from desert areas to the oceans.
D The revolution of the Earth around the Sun prevents rainfall in the areas on the western parts of large continents.The revolution of the Earth around the Sun prevents rainfall in the areas on the western parts of large continents.
E The rotation of the Earth generates winds that are deflected as the Earth moves.
The features of the Earth that most directly contribute to the climate observed in Western Sahara are:
"The convection currents in the atmosphere deposit warm, dry air at the latitudes that contain Western Sahara.The convection currents in the atmosphere deposit warm, dry air at the latitudes that contain Western Sahara." (Option A) ; and "The rotation of the Earth generates winds that are deflected as the Earth moves." (Option E).What is Climate?Climate is an area's long-term weather trend, often averaged over 30 years.
More precisely, it is the average and variability of climatic variables across temporal periods ranging from months to millions of years.
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The concentration of a solution of sodium hydroxide is 0.10 mol/dm3. What is the concentration of the solution in g/dm3?
The concentration of solution of sodium hydroxide is 4 g/dm³ as per the molar concentration concept, to convert mole/dm³ to g/dm³ multiply the concentration by molar mass, which is 40 g.
What is molar mass?Molar mass of a compound or a molecule is defined as the mass of the elements which are present in it.The molar mass is considered to be a bulk quantity not a molecular quantity. It is often an average of the of the masses at many instances.
The molecular mass and formula mass are used as synonym for the molar mass.It does not depend on the amount of substance which is present in the sample.It has units of gram/mole.
Molar masses of an element are given as relative atomic masses while that of compounds is the sum of relative atomic masses which are present in the compound.
The molar mass of sodium hydroxide is 40 g thus, concentration in mole/dm³×40, that is 0.10×40= 4 g/dm³.
Thus , the concentration in g/dm³ is 4 g/dm³.
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find the molality of the solution if 42 grams of potassium chloride (kcl) are dissolved in 3.6 kg of water.
When 42 grams of potassium chloride (kcl) are dissolved in 3.6 kilogram of water, the resulting solution has a molality of 0.156 m.
Describe molality.The term "molal concentration" is another word for molality. It measures the solute concentration in a solution. There are a variety of terminology that can be used to describe a solution's concentration, including molarity, molality, normality, formality, volume percentage, weight percentage, and parts per million. The term must determine the molecular weight of the solute and the mass of the solvent.
Molality is the best method for transferring concentration since the mass of the solute and solvent in the solution is constant.
Molality = moles of solute/ liters of solution
Moles of KCl = (42g KCl) x (1 mole KCl/74.5513 g) = 0.5633 moles KCl
Water in kg = 3.6 kg
m = 0.5633/3.6
m = 0.156
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a soluble iodide was dissolved in water. then an excess of silver nitrate, , was added to precipitate all of the iodide ion as silver iodide, . if g of the soluble iodide gave g of silver iodide, how many grams of iodine are in the sample of soluble iodide? what is the mass percentage of iodine, , in the compound?
Answer:
a: 1.181grams of iodine are present in the sample of soluble iodide.
b: 76.44 percent iodine is the mass percentage of iodine when excess silver nitrate was added to precipitate all of the iodide ions
Explanation:
We know that when silver reacts with halides it forms precipitate, silver when reacts with iodine it forms a yellow coloured precipitate of silver iodide which is an inorganic compound soluble in water. One odd characteristic of silver iodide is that it is photosensitive and may form metallic/dark silver if exposed to light. One of the most renowned albeit controversial use of silver iodide is that it is used to generate rain through clouds
Ag+ (aqueous)+ I−(aqueous) →AgI(s) yellow precipitate
2.185g x (1 mole of AgI / 234.77 AgI) x (1 mole Iodine/1 mole AgI) x (126g of Iodine/1 mole of I)
= 1.181g
b)Now, mass percentage can be obtained by using the following formula
mass percentage = mass of solute/mass of solution x 100
iodine mass percent = (mass of iodine/mass of soluble iodide) x 100
= (1.181/1.545) x 100 = 76.44 %
mass percentage is the mass of the element/solute divided by the mass of compound or solution ,then the result is multiplied to get the answer. It can be defined as the weight of solute in a particular weight of solution.
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Oxygen is important in the oxidation of glucose because it ____________________________.
Oxygen is important in the oxidation of glucose because it involves breakdown of glucose in presence of oxygen to produce a large amount of energy.
Glucose oxidation breaks down glucose to create energy. Oxidation of glucose in the presence of oxygen is called respiration. Oxidation means addition of oxygen to a molecule. Respiration is the chemical process by which organic compounds change into different reactions. Glucose reacts with molecular oxygen to produce carbon dioxide and water. The carbon atoms in glucose are oxidized. It produces less amount of energy in absence of glucose. Presence of oxygen in glucose breakdown produces carbon dioxide and water along with the release of large amounts of energy. So, oxygen is necessary for glucose breakdown.
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the combined gas law relates volume and temperature. the combined gas law relates volume and temperature. true false
True, Combined gas law does relates volume and temperature.
The combined gas law is effectively a restructuring of the ideal gas law, where both n (mols of gas) and R (already a constant) remain constant. It can be used to determine how changes in pressure, volume, or temperature can be used to calculate the conditions of the resulting system.
The combined gas law is a combination of the three previously known laws which are- Boyle’s law PV = K, Charles law V/T = K, and Gay-Lussac’s law P/T = K. Therefore, the formula of combined gas law is PV/T = K,
Where P = pressure, T = temperature, V = volume, K is constant.
One can adjust the formula for the combined gas law so as to compare two sets of conditions in one substance. In the equation, the figures for temperature (T), pressure (P), and volume (V) with subscripts of one are representative of the initial condition. Also, those with the subscripts of two are representative of the final condition.
So we can conclude that the combined gas law relates volume and temperature.
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if a phosphoric acid solution has a ph of 2.42, what can you tell about the relative concentrations of phosphoric acid and dihydrogen phosphate? the pka for each step in the dissociation of phosphoric acid is given.
2.00 [H3PO4] [H₂ PO] = 2.00 X [H₂ PO₁]
The first dissociation of phosphoric acid involves the species phosphoric acid, H2 PO4, and dihydrogen phosphate, H2 PO. The formula for the acid dissociation constant is: Ka, =2.42
the logarithm of the log On both sides of the mentioned equation, ka1 =
Pн = PKA + log [H, PO4)
Using definitions
[H3PO4] The renderson equation mentioned above will be utilized to determine the relative concentrations. log PH - Pka, 2.42; [H2 PO] =0.3
I log x = 2 = 109
Thus, X= 2.00 [H3PO4] [H₂ PO] = 2.00 X [H₂ PO₁]
Dihydrogen phosphate is present at higher concentrations than phosphoric acid.
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which is the major product of the reaction of ethyl grignard and propiophenone (ethyl phenyl ketone)?
2-Methyl-butan-2-ol is the major product of the reaction of ethyl grignard and propiophenone (ethyl phenyl ketone).
What type of reaction is Grignard?The nucleophile in a keto or aldehyde is coupled to alkyl, ethyl ester, vinyl, or allylic halides in the Fermentation process, an organo combination of carbon monoxide. It takes place in this process for carbon-carbon bonds to form.
What purpose does Grignard reagent serve?It is possible to count the halogen atoms in a halide compound using Grignard reagents. For the chemical examination of several glycerides as well as numerous cross-coupling processes for the synthesis of various dioxide and carbon-heteroatom linkages, Grignard degradation is employed.
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you start with a flask at 900k containing only sulfur trioxide at an unknown pressure and allow the equilibrium below to be established. if the final sulfur trioxide pressure is 5.00 atm, what was its initial pressure? 2 so2 (g) o2 (g) <--> 2 so3 (g) kp
2so3 is the initial pressure that is seen to be used for the chemical reactions with flask 900k
what is pressure in a chemical reaction?
Pressure (P) is defined as the force of all the gas particle/wall collisions divided by the area of the wall: All gases exert pressure; it is one of the fundamental measurable quantities of this phase of matter.We can define pressure as: The force applied perpendicular to the surface of an object per unit area over which that force is distributed.The pressure of the gas is the force that the gas exerts on the container boundaries. The gas molecules move randomly along the given volume. During this movement, they collide with the surface and also with each other.A simple example of pressure may be seen by holding a knife to a piece of fruit. If you hold the flat part of the knife against the fruit, it won't cut the surface. The force is spread out of a large area (low pressure).Pressure is defined as force applied per unit area. Mathematically it is given by, P=FA. where F is the force acting perpendicular to the surface area A. The standard unit of pressure is the pascal (Pa), equivalent to one newton per meter squared (N/m 2 ).The rapid motion and collisions of molecules with the walls of the container causes pressure (force on a unit area). Pressure is proportional to the number of molecular collisions and the force of the collisions in a particular area. The more collisions of gas molecules with the walls, the higher the pressure.to know more about pressure follow
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is it possible to prepare 1-chloro-2,2-dimethylpropane in high yield by halogenation of an alkane? how many monohalo isomers are possible upon radical halogenation of the parent alkane?
By halogenating an alkane, it is feasible to produce high yields of 1-chloro-2,2-dimethylpropane. Therefore, following radical halogenation of the parent alkane, only one monohalo isomer is feasible.
A double-branched chain alkane containing five carbon atoms, neopentane is also known as 2,2-dimethylpropane. Neopentane is a flammable gas at ambient pressure that, on a chilly day, in an ice bath, or when compressed to a higher pressure, can condense into a highly volatile liquid known as dimethylpropane. In organic chemistry, an alkane is an acyclic saturated hydrocarbon, sometimes known as paraffin (a historical quaint word that also has various meanings). In other terms, an alkane is made up of carbon and hydrogen atoms that are all grouped in a tree form.
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consider a situation in which you analyze a mixture of the starting alcohol and the alkene product of an elimination reaction using tlc. if you used a reverse phase tlc plate, which compound would have the higher retention factor? group of answer choices the alkene
Alcohol would have the higher retention factor .
What is Alcohol ?A molecule that can be found in alcoholic beverages like beer, wine, and liquor. Additionally, it can be discovered in several medications, mouthwashes, home goods, and essential oils. It is produced through the chemical process of fermentation, which makes use of yeast and sugar.
The four different forms of alcohol are rubbing, isopropyl, denatured, and ethyl. Ethyl alcohol, commonly known as ethanol or grain alcohol, is the one that we are most familiar with and adore. It is produced by fermenting sugar and yeast and is a component of beer, wine, and alcoholic beverages.Alcohol found in beverages is known as ethanol. It is created when the carbohydrates in grains, fruits, and vegetables are fermented by yeast. For instance, the sugar in potatoes is used to make vodka and the sugar in grapes to make wine.To know more about Alcohol please click here ; https://brainly.com/question/947751
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how many milliliters of a stock solution of 2.00m mgso4 would you need to prepare 100.0ml of 0.400m mgso4
The volume of 2.00 M MgSO₄ is 20.0 mL.
Parameter
M₁ = 2.00 MM₂ = 0.400 MV₂ = volume of 0.400 M MgSO4 = 100.0 mLIf we added water to the first solution, the concentration changed but the mole in that solution didn't change.
Formula between mole, volume, and concentration (molarity)
[tex]M = \frac{n}{V}[/tex]
n = M×V
n = moleV = volume (mL)M = concentration (Molar)n₁=n₂
M₁×V₁ = M₂×V₂
2.000×V₁ = 0.400×100.0
2.000×V₁ = 40.0
[tex]V_1 = \frac{40.0}{2.000}[/tex]
V₁ = 20.0 mL
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In Spain, the legal blood alcohol limit is 250 of alcohol per 1 L of breath. What is this alcohol concentration in parts per billion, ppb?
The alcohol concentration in parts per billion, ppb given that the alcohol limit is 250 of alcohol per 1 L of breath is 25×10¹⁰ ppb
How do I determin the concentration in ppb?The concentration of substance in parts per million, ppb can be obtained by using the filling formula:
Concentration (in ppb) = (amount of solute / volume) × 10⁹
With the above formula, we can obtain the alcohol concentration in parts per billion, ppb as shown below:
The concentration of the vitamin C in ppb can be obtained as follow:
Amount of alcohol = 250Volume = 1 LConcentration (in ppb) =?Concentration (in ppb) = (amount of solute / volume) × 10⁹
Concentration (in ppb) = (250 / 1) × 10⁹
Concentration (in ppb) = 25×10¹⁰ ppb
Thus, the concentration in ppm is 25×10¹⁰ ppb
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calculate the theoretical yield of strontium sulfate when 525 ml of 1.199 m sulfuric acid is added to 23.66 grams of strontium bromide
The theoretical yield of strontium sulfate will be 16.47g.
The theoretical yield here can be calculated as:
The grams of sulfuric acid present calculated using formula; molarity = given mass/molar mass/ volume of solution (L)
This will give 61.73 g of sulfuric acid.
In the balanced chemical reaction 1 mole of strontium bromide react with 1 mole of sulfuric acid to give 1 mole of strontium sulfate and 2 moles of hydrobromide. Molar mass of strontium sulfate is 183g/mol and strontium bromide is 246g/mol.
calculating number of moles by using given mass/molar mass; we get
0.09 moles of strontium bromide and 0.63 moles of sulfuric acid.
Thus as 1 mole of strontium sulfate is produced thus: 1*0.09*183 = 16.47g
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