Sample 1 = 2.61 * 10^-3 g
Sample 2 = 3.62 * 10^-3 g
Sample 3 - 1.80 * 10^-3 g
What is the scientific notation?We know that when we talk about the scientific notation we are talking about the way that we can use to reduce the bulk of the figures such that the figures that we have would be minimal.
In this case we have been told that the values of the samples can be given by;
Sample 1: 0.00261 grams
Sample 2: 0.00362 grams
Sample 3: 0.00180 grams
The task is to write these values by the use of the scientific notation.
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A pet store owner wants to mix a 11% saltwater solution and a 34 % saltwater solution to obtain 46
liters of a 21% solution. Let a stand for the amount of 11% solution and y for the amount of 34 %
solution.
a. How much saltwater is in the 11% solution?
b. How much saltwater is in the 34% solution?
c. Write an equation about the total amount of solution in the mixture.
x+y=46
d. Write another equation about the amount of saltwater in the mixture.
11x +34y= .21 (46)
O
e. Solve your system and answer the question: How many liters of each ingredient does he need?
11% solution:
34% solution:
a. The amount of saltwater in the 11% solution is 2.86 liters.
b. The amount of saltwater in the 34% solution is 6.8 liters.
c. The total amount of solution in the mixture is 46 liters.
d. The amount of saltwater in the mixture is 9.66 liters.
e. The pet store owner needs 26 liters of the 11% solution and 20 liters of the 34% solution.
How to find the e amount of saltwater in the 11% solution?To solve this problem, we need to use a system of two equations in two variables. Let x be the amount of the 11% solution and y be the amount of the 34% solution. Then we have:
a. The amount of saltwater in the 11% solution = 0.11x
b. The amount of saltwater in the 34% solution = 0.34y
c. The total amount of solution in the mixture is 46 liters, so we have the equation x + y = 46.
d. The amount of saltwater in the mixture is the sum of the amount of saltwater in the 11% solution and the amount of saltwater in the 34% solution. This is given by 0.11x + 0.34y = 0.21(46) = 9.66.
So we have the system of equations:
x + y = 46
0.11x + 0.34y = 9.66
To solve this system, we can use substitution or elimination. Here we will use elimination:
Multiply the first equation by 0.11:
0.11x + 0.11y = 5.06
Subtract this from the second equation:
0.23y = 4.6
y = 20
Substitute y = 20 into the first equation:
x + 20 = 46
x = 26
Therefore, the pet store owner needs 26 liters of the 11% solution and 20 liters of the 34% solution.
So,
a. The amount of saltwater in the 11% solution is 0.11x = 0.11(26) = 2.86 liters.
b. The amount of saltwater in the 34% solution is 0.34y = 0.34(20) = 6.8 liters.
c. The total amount of solution in the mixture is x + y = 26 + 20 = 46 liters.
d. The amount of saltwater in the mixture is 0.21(46) = 9.66 liters.
e. The pet store owner needs 26 liters of the 11% solution and 20 liters of the 34% solution.
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Hydrogen bonds account for which of the following observation?
01:05.
Hydrogen naturally exists as a diatomic molecule.
Hydrogen is easily combustible with oxygen. Spon
Water molecules are bent or "V-shaped".
Air is more dense than hydrogen gas.
For its molar mass, water has a high boiling point.
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A.
B.
C.
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E) Water's high boiling temperature and molar mass are accounted for by hydrogen bonding.
What three different intermolecular forces of attraction are there?The London dispersion force, the dipole-dipole interaction, and the ion-dipole interaction are the three main categories of intermolecular forces.
What do the forces of attraction between molecules mean?A force that attracts the protons or positive parts of one molecule to the electrons or negative parts of another molecule is known as an intermolecular force. A substance's various physical and chemical properties are influenced by this force.
The forces that attract opposing positive and negative charges when two interacting molecules come into contact are known as intermolecular forces of attraction, or IMFA. These include the London dispersion force, hydrogen bonding, dipole-dipole, and ion-dipole forces.
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Full Question = Hydrogen bonds account for which of the following observation? a) hydrogen naturally exists as a diatomic molecule b) it is easily combustible with oxygen c) water molecules are bent or "v-shaped" d) air is more dense than hydrogen bonds e) for its molar mass, water has a high boiling point
Answer:
E) Water's high boiling temperature and molar mass are accounted for by hydrogen bonding.
carboxylic acids are typically prepared using oxidation reactions. which of the functional groups below can be oxidized to give a carboxylic acid product? select all that apply.A) Primary alcohols
B) Phenols
C) Secondary alcohols
D) Alkynes
Primary alcohols and alkynes can be oxidized to give carboxylic acid products.
Addition of an oxidizing agent such as potassium permanganate (KMnO4) to acidic, alkaline, or neutral media shows the oxidation of primary alcohols to carboxylic acids. Aldehydes can be converted to carboxylic acids by using mild oxidizing agents. Oxidation of primary alcohols is a common method for the synthesis of carboxylic acids.
RCH2OH → RCOOH. This requires strong oxidants, most commonly chromic acid (H2CrO4), potassium permanganate (KMnO4), and nitric acid (HNO3). Primary alcohols and aldehydes are typically oxidized to carboxylic acids with potassium dichromate(VI) solution in the presence of dilute sulfuric acid.
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The average mass of an M&M candy is 0.625 g. What is the mass of 12 M&Ms? The answer should
be reported to three (3) significant figures. Why are there no sig figs associated with 12 M&Ms?
Answer:The mass of 12 M&Ms can be calculated by multiplying the average mass of an M&M (0.625 g) by the number of M&Ms (12):
0.625 g * 12 = 7.5 g
The answer should be reported to three significant figures, so it would be 7.5 g.
There are no significant figures associated with 12 M&Ms because it is a whole number and does not have any uncertainty. Significant figures are used to indicate the degree of accuracy or precision of a measurement, and whole numbers are considered to be exact values without any uncertainty.
Explanation:
Which of these molecules exhibit hydrogen bonding? Select all that apply. a) chloromethane. b) methanol. c) methane
Chloromethane and methanol are both capable of exhibiting hydrogen bonding, while methane does not. The correct answer A and B.
Chloromethane and methanol both contain hydrogen atoms that are covalently bound to a more electronegative atom (chlorine and oxygen, respectively), which creates a partial positive charge on the hydrogen atom. This partial positive charge can interact with a partial negative charge on a nearby molecule, forming a hydrogen bond.
When hydrogen bonding occurs, the hydrogen atom acts as a bridge between two molecules, allowing them to interact and creating a strong bond. The hydrogen bond is formed when the partial positive charge on the hydrogen atom interacts with a partial negative charge on an electronegative atom of a nearby molecule.
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show the equations you will use to calculate %protein, %phosphate, and %fat in milk
%Protein = (Protein content in Milk / Total Weight of Milk) x 100
%Phosphate = (Phosphate content in Milk / Total Weight of Milk) x 100
%Fat = (Fat content in Milk / Total Weight of Milk) x 100
Define weight?
Weight is a measure of the force of gravity on an object. It is the amount of mass an object has and is usually measured in kilograms (kg) or pounds (lbs). Weight is related to mass, but not the same; mass is the amount of matter in an object, while weight is a measure of the strength of gravity on that object. Weight is a vector quantity, which means it has both magnitude and direction. Weight is an important factor to consider when designing objects and structures, as it affects how much a material can support and the amount of stress it can withstand.
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Label a data table so that the experimenter can record observations for the sand and water temperatures at various points.
the collum table 5 length x 3 width
science
Answer:
Explanation:
Here is a labeled data table for recording sand and water temperatures at various points:
Point Sand Temperature (°C) Water Temperature (°C)
1
2
3
4
5
The table is 5 columns wide and 3 rows long, with the first column labeled "Point" to indicate the location being observed, and the second and third columns labeled "Sand Temperature (°C)" and "Water Temperature (°C)" respectively to indicate the type of temperature being measured. The cells under the "Sand Temperature (°C)" and "Water Temperature (°C)" columns are left blank to allow the experimenter to record the corresponding temperature readings for each point.
in an intramolecular proton transfer reaction, the acidic site and the basic site are tethered in the same structure, and a proton is passed from the acidic region of the structure to the basic region of the structure. an example is shown. draw a mechanism for this brocess.
The mechanism is given as
here, hydrogen is most acidic, so it's likely to have an intramolecular proton transfer reaction in this problem. One of other sites for an acid base reaction will react with hydrogen because most of the oxygen is negative.
One of these oxygen's is going to act as a base and it's going to take this hydrogen and put it on that oxygen, their negative charge is going to act more basic than the other oxygen.
When electrons are shifted into hydrogen, We have an alcohol here and a carboxyl ion over here. Our acid now is an alcohol and our carboxylic acid is stronger, so we're going towards the weaker acid and base.
In other words, equilibrium is shifted towards the right.
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What is a unit for distance?
There are several units for distance, but the most commonly used unit in the International System of Units (SI) is the meter (m). The meter is defined as the distance traveled by light in a vacuum during a time interval of 1/299,792,458 of a second.
What is Distance?
Distance is a measure of the amount of space between two points. It is the length of the path taken by an object or person moving from one point to another, regardless of the direction taken. Distance is a scalar quantity, meaning it has magnitude but not direction.
Distance can be measured using a variety of units, such as meters, kilometers, miles, or feet, depending on the context and the scale of the distance being measured. For example, we might measure the distance between two cities in kilometers, the distance between two buildings in meters, or the distance between two points on a map in miles.
Other units for distance include:
Kilometer (km): 1,000 meters
Centimeter (cm): 1/100th of a meter
Millimeter (mm): 1/1,000th of a meter
Micrometer (µm): 1/1,000,000th of a meter
Nanometer (nm): 1/1,000,000,000th of a meter
There are also larger units for distance, such as the astronomical unit (AU) which is used to measure distances within the solar system.
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Draw to scale the lines where the equipotential surfaces due to these plates intersect the paper. Limit your drawing to the region between the plates, avoiding their edges, and draw the lines for surfaces that are 10.0 V apart, starting at the low-potential plate.
how would my graph look?
The field strength is measured in Volts / meter (V/m). The voltage is 50V. The distance is 'halfway between' 25cm ( = .25m), or .125m. The field strength is thus = 50V / .125m = 400 V/m
Equipotential surfaces are surfaces where the potential difference is constant. In the given scenario, the two parallel metal plates are connected across a 50.0V battery, and the equipotential surfaces due to these plates will intersect the paper in the region between the plates.
The lines representing the equipotential surfaces will be perpendicular to the electric field lines and will be parallel to each other. The equipotential surfaces will start at the low-potential plate and be 10.0V apart, with the potential increasing as you move away from the low-potential plate. The equipotential surfaces will be closer together near the high-potential plate and further apart near the low-potential plate.
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Two very large metal parallel plates that are 25cm apart, oriented perpendicular to a sheet of paper, are connected across the terminals of a 50.0V battery. Draw to scale the lines where the equipotential surfaces due to these plates intersect the paper. Limit your drawing to the region between the plates, avoiding their edges, and draw the lines for surfaces that are 10.0 V apart, starting at the low-potential plate.
A sample of heptane always contains 84% carbon and 16% hydrogen. Which of these best explains this phenomena?a.Law of Constant Composition b.Law of Conservation of Mass c.Dalton's Atomic Theory d.Law of Mass Actione.Lavoisier's Law
The law of definite proportion best explains this phenomenon.
Heptane has been reported to constantly contain 84% carbon and 16% hydrogen. This indicates that heptane will always contain 84% carbon and 16% hydrogen, regardless of where it was produced or how it was produced. This accords with the law of definite proportion, which stipulates that regardless of the compound's origin or the chemical reaction that created it, a given compound will always contain its constituents in an unaltered mass ratio.
The law of definite proportions, commonly referred to as Proust's law or the rule of constant composition, holds that a chemical compound's constituents are always present in a predetermined ratio regardless of the source or method of synthesis (by mass).
The law of definite proportion serves as an example of this.
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Which compounds give a NMR spectrum with two signals in a ratio of 2:3?Knowing the molecular formula of a compound and integration values from its NMR spectrumgives the actual number of protons responsible for a particular signal.
Compounds give a NMR spectrum with two signals in a ratio of 2:3 are
CH3CH2ClCH3CH2CH3CH3CH2OCH2CH3CH3OCH2CH2OCH3 (there are two types of hydrogen atoms, the ratio is 6:4 or 3:2)
About hydrogenHydrogen is a chemical element with symbol H and atomic number 1 on the periodic table. At standard temperature and pressure, hydrogen is a colorless, odorless, nonmetallic, monovalent, and highly flammable diatomic gas.
Hydrogen can also be produced from water by electrolysis, but this process is commercially more expensive than producing hydrogen from natural gas. The most abundant isotope of hydrogen in nature is protium, whose nucleus has only one proton and no neutrons.
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do both members of the following pairs have the same number of protons? neutrons? electrons? (a) 3 h 1 and 3 he 2 (b) 14 c 6 and 15 n 7
For ³₁H and ³₂He, Protons are NOT equal, Electrons are not equal, Neutrons are not equal and for ¹⁴₇N and ¹⁵₇N, Protons are Not equal, Electrons are Not equal, Neutrons are equal.
Atomic isotopes are frequently represented by the nuclear symbol. Isotopes are different versions of an element's atoms. In comparison to other atom types, isotopes contain a varied number of neutrons.
Three components make up the nuclear symbol: the element's symbol, the atomic number, and the mass number. The usual notation for an element's nuclear symbol is anX, where an is the element's mass number and n (or frequently z) is the atomic number.
The total number of protons and neutrons in the atom's nucleus is represented by the mass number, or a.
The quantity of protons in an atom's nucleus, or "atomic number," is known.The amount of neutrons in the isotope determines the difference between the mass number and the atomic number.
The hyphen notation is another symbol used to signify isotopes. The element's name, a hyphen, and the isotope's mass number are used in this notation. For instance, the isotope 126C can alternatively be written as carbon - 12 when employing the hyphen notation.
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Using the data in the Reagents and Properties table, calculate the theoretical yield of methoxybenzaldehyde in grams, assuming you start with 1.50 g of the alcohol. (Assume the alcohol is the limiting reactant). Be sure to show your work: you will NOT receive credit if work is not shown. You may wish to make a copy of this calculation to assist you with your post-lab questions
The theoretical yield of methoxy benzaldehyde is 1.47 g.
We must determine the quantity of p-methoxybenzyl alcohol consumed in the process in order to compute the theoretical yield of methoxy benzaldehyde.
The amount of methoxy benzaldehyde produced will be equal to the amount of p-methoxybenzyl alcohol consumed in the reaction because it is the limiting reactant.
Because the molar mass of 1.5 g of p-methoxybenzyl alcohol is 138.15 g/mol, its moles can be computed as follows:
moles of p-methoxybenzyl alcohol = 1.5 g / 138.15 g/mol = 0.0108 mol
Methoxy benzaldehyde's theoretical yield can be computed as follows:
Theoretical yield (g) = p-methoxybenzyl alcohol moles × the methoxy benzaldehyde molar mass (g/mol) = 0.0108 mol x 136.15 g/mol, or 1.47 g.
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Predict the major organic product when trans-1-chloro-2-methylcyclohexane is heated with concentrated sodium ethoxide [dissolved in ethanol/dimethyl sulfoxide (DMSO) as the solvent]. Cl
+CH 3
CH 2
−OΘ /Na
( in EtOH/DMSO
3.0MCH 3
CH 2
ONa/Δ
Oc D. E.
The major organic product when trans-1-chloro-2-methylcyclohexane is heated with concentrated sodium ethoxide in ethanol/dimethyl sulfoxide (DMSO) as the solvent is expected to be 2-methylcyclohexanol.
This reaction is a nucleophilic substitution reaction where the sodium ethoxide acts as a nucleophile and attacks the chlorine atom, replacing it with an ethoxide ion and forming an intermediate alkoxide. The intermediate alkoxide can then undergo an elimination reaction, leading to the formation of the alcohol product. The reaction is expected to occur with Markovnikov's rule, meaning that the hydrogen from the alkoxide will add to the less substituted carbon in the intermediate, leading to the formation of 2-methylcyclohexanol. the major organic product when trans-1-chloro-2-methylcyclohexane is heated with concentrated sodium ethoxide [dissolved in ethanol/dimethyl sulfoxide (DMSO) as the solvent]. Cl
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What percentage of energy sources are found underground
Energy sources found underground Oil, natural gas, and coal are collectively called fossil fuels.
What energy sources are found underground?sources of energy are fossil fuels formed within the Earth from dead plants and animals over millions of years—hence the name “fossil” fuels. They are established in underground layers of rock and dregs. Nonrenewable energy resources involve coal, natural gas, and oil, ... They are found in underground layers of rock and lees.
Still oil and natural gas will pursue to be the world's top two energy sources accounting for about 60 percent of global demand main energy sources are generally restricted as renewable or nonrenewable on the basis of whether they draw on an exhausted energy resource.
So we can conclude that Even today, oil, coal, and gas serve about 80 chunks of our energy source needs.
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Iron has four naturally occuring isotopes: iron-54, iron-56, iron-57, and iron-58. The natural abundance of each of these isotopes
is shown in the table.
Isotope:
iron-54
iron-56
iron-57
iron-58
Natural Abundance (%):
5.80
91.72
2,20
0.28
-
Identify the isotope that is least abundant on Earth.
iron-54
iron-56
iron-57
-
Identify the isotope that is most abundant on Earth.
iron-57
iron-56
iron-58
iron-54
Iron has four naturally occurring isotopes: iron-54, iron-56, iron-57, and iron-58 are mentioned below.
What is isotope ?
The element's isotopes, though they belong to the same family of elements, differ in the number of neutrons they contain. According to the Periodic Table, an element's atomic number is based on how many protons it has.
What is iron ?
Several processes in our bodies require iron. Hemoglobin, a protein formed in part of iron, is one that carries oxygen from the lungs to every cell in the body. It helps our muscles retain and use oxygen. Iron is also found in a wide variety of other proteins and enzymes. Your body needs the recommended dosage of iron.
Least abundance means having least percentage , So iron-58 is 0.28% hence iron-58 is least abundant isotope of iron.
Most abundant means having highest percentage, so iron-56 is 91.72% ,hence most abundant isotope.
Therefore, Iron has four naturally occurring isotopes: iron-54, iron-56, iron-57, and iron-58 are mentioned above.
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experiment 2: calculate the molar mass of fp sample 2. note that this sample dissociates to form two ions in solution.
The molar mass of fp sample is 74.5513 g/mol
What is molar mass?The molar mass of a sample is the mass of a single mole of the sample in grams. Since the sample dissociates to form two ions in solution, the molar mass will be the sum of the masses of the two ions. To calculate the molar mass, you need to know the mass of each ion, which can be calculated by multiplying the atomic mass of each element in the ion by the number of atoms of that element in the ion. For example, if the sample is KCl, the molar mass would be calculated as follows:
Molar mass = atomic mass of potassium (39.0983 g/mol) * 1 atom of potassium + atomic mass of chlorine (35.453 g/mol) * 1 atom of chlorine
Molar mass = 39.0983 g/mol + 35.453 g/mol
Molar mass = 74.5513 g/mol
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A bacterium such as Pseudomonas uses nitrate as a final electron acceptor in an electron transport system. All of the statements below are true, EXCEPT?
a. The process require an electron donor
b. The process produces nitrite ion
c. They can respire without O2
d. The process does not yield as much ATP
e. The require light
When pseudomonas uses nitrate as a final electron acceptor in anaerobic respiration. Here the statement which is wrong is they require light. Option e is the correct answer.
Pseudomonas can survive both in aerobic and anaerobic conditions as it is capable of both aerobic and anaerobic respiration. The process require an electron donor. Nitrate ion acts as the donor. Nitrite ions are produced during anaerobic respiration. Nitrate reductase convert nitrates to nitrites.
This process does not require oxygen because nitrate acts as the electron donor. This process yield less ATP compared to aerobic respiration.
So the statement which is not true is option e. They require light.
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orderly crystal shapes, high melting points, and electrical conductivity when dissolved in water are properties of ionic compounds. (True or False)
True. Ionic compounds are made up of ions, which are atoms that have a positive or negative charge due to the gain or loss of electrons.
What is atoms ?Atoms are the building blocks of all matter in the universe. They are the smallest particles that make up elements and are composed of protons, neutrons, and electrons. Atoms are so small that they can only be seen with the aid of powerful microscopes. They are the fundamental particles of chemistry and cannot be broken down into anything simpler. Atoms are the basic unit of matter and each atom has its own unique chemical properties. The combination of these properties determines the physical and chemical characteristics of the substances made up of atoms. Atoms can combine with other atoms to form molecules, and molecules can combine to form compounds. This is the basis of all chemical reactions and the foundation of modern chemistry.
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In which situation can Le Chatelier's principle be applied? (1 point) It can be applied when a reaction is reversible, and environmental conditions are kept constant. It can be applied when a reaction happens in a single direction, and environmental conditions are changed. It can be applied when a reaction happens in a single direction, and environmental conditions are kept constant. It can be applied when a reaction is reversible, and environmental conditions are changed.
Le Chatelier's principle can be applied when a reaction is reversible, and environmental conditions are kept constant. Therefore, option A is correct.
What is Le Chatelier's principle ?The Le Chatelier's principle may be described as follows: When a system is in a state of dynamic equilibrium and an external stress is applied, the system moves the location of equilibrium to cancel out the effect of the stress.
Chemical systems can be stressed by altering the concentration, pressure, or temperature.
According to Le Chatelier's principle, for exothermic reactions, the equilibrium changes towards the reactant side as the temperature rises; while, for endothermic reactions, the equilibrium shifts towards the product side as the temperature rises.
Thus, option A is correct.
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Answer:
Changing Reaction Rates Quick Check
1. The forward reaction would increase to start reducing the concentration of N2.
2. It can be applied when a reaction is reversible, and environmental conditions are CHANGED.
3. The equilibrium will shift to the LEFT.
4. Adding steam allows more molecules of the REACTANTS to collide, causing the rate of the FORWARD reaction to increase.
5. an increase in the concentration of CO.
Explanation:
if you put these answers, 100%.
P.S. I used "kept constant" for question 2 like the person suggested and it was incorrect for me.
How many electrons in an atom could have these sets of quantum numbers? =4,ℓ=3
14 electrons in an atom could have these sets of quantum numbers ℓ=3. Quantum numbers are eigenvalues of operator
What is quantum numbers?Quantum numbers are used in quantum chemistry and physics to explain the values of state maintains in the dynamic of either a quantum system. Quantum numbers are eigenvalues of operator that commute with Harmonic oscillator that may be known with accuracy while also knowing time as the program's energy as well as eigenspaces.
A description of every one of the quantum numbers of such a quantum system, when combined, completely characterizes the system's basic state and may, in theory, be measured collectively. ,ℓ=3 represents f subshell, which can occupy total 14 electrons.
Therefore, ,ℓ=3 represents f subshell, which can occupy total 14 electrons.
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Which of the following is/are logical assumption(s) that can be derived from analysis of this pathway alone? In other words, disregard any side-pathways that may or may not stem from these two steps.Choose one or more:A. Ineffective argininosuccinase activity will cause a cellular accumulation of arginine.B. Ineffective argininosuccinate synthetase activity will cause a cellular accumulation of fumarate.C. Ineffective argininosuccinate synthetase activity will cause a cellular accumulation of citrulline.D. Ineffective argininosuccinase activity will cause a cellular accumulation of argininosuccinate.
The results of research on this particular pathway logically support the following statement: The inefficient activity of argininosuccinase causes cellular argininosuccinate to accumulate.
The enzymes argininosuccinase synthetase and argininosuccinase control the urea cycle, a metabolic process that helps the body get rid of excess nitrogen. Cells build up argininosuccinate because dormant argininosuccinase activity prevents the final step in the conversion of argininosuccinate to arginine and fumarate.
The urea cycle breaks down waste nitrogen into urea, which the body excretes. The enzymes argininosuccinate synthetase and argininosuccinase are necessary for this cycle. There is an accumulation of argininosuccinate inside the cell because argininosuccinase is unable to convert it to arginine and fumarate.
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The combustion of octane, C8H18, proceeds according to the reaction shown.
2C8H18(l)+25O2(g)⟶16CO2(g)+18H2O(l)
If 546 mol of octane combusts, what volume of carbon dioxide is produced at 12.0 ∘C and 0.995 atm?
If 546 mol of octane combusts,102772.3 L volume of carbon dioxide is produced at 12.0 ∘C and 0.995 atm.
What is an ideal gas equation ?The ideal gas law states that the product of the pressure and the volume of one gram molecule of an ideal gas is equal to the product of the absolute temperature of the gas and the universal gas constant.
It is represented by PV = nRT
Given:
Moles of octane = 546 moles
According to the given reaction:-
2C8H18(l)+25O2(g)⟶16CO2(g)+18H2O(l)
2 moles of octane on reaction produces 16 moles of carbon dioxide
1 mole of octane on reaction produces 16/2 moles of carbon dioxide
546 moles of octane on reaction produces 8 × 546 moles of carbon dioxide
Moles of carbon dioxide = 4368 moles
Given:
Pressure = 0.995 atm
Temperature = 12.0 °C
The conversion of T( °C) to T(K) is shown below:
T(K) = T( °C) + 273.15
T₁ = (12.0 + 273.15) K
= 285.15 K
By using ideal gas equation as:
PV=nRT
where,
P is the pressure
V is the volume
n is the number of moles
T is the temperature
R is Gas constant having value = 0.0821 L.atm/K.mol
Applying the equation as:
0.995 atm × V = 4368 mol × 0.0821 L.atm/K.mol × 285.15K
V = 102772.3
Thus, If 546 mol of octane combusts,102772.3 L volume of carbon dioxide is produced at 12.0 ∘C and 0.995 atm.
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Consider the below 1H NMR spectrum. How many neighboring hydrogen atoms are there to the hydrogen atoms that produce signa C? A) 3B) 5C) 6 D) 2
The correct answer is "4".There are four neighboring hydrogen atoms are there to the hydrogen atoms that produce signa CAs per the graph, signal C is spitted into quartet (i.e. four part).
According to given [tex]^{1}H[/tex] NRM spectrum:
Signal C is spitted into four numbered as 2.50, 2.45, 2.40, and 2,35.
It started from 2.50 and ended at 2.35, the difference is of 2.03.
So, As per the graph, signal C is spitted into quartet (i.e. four part).
Therefore, Among all the options of 3, 4, 4, 6, 2; there are four neighboring hydrogen atoms are there to the hydrogen atoms that produce signa C.
Full question:
Consider the below 1H NMR spectrum. How many neighboring hydrogen atoms are there to the hydrogen atoms that produce signa C?
A) 3
B) 5
C) 6
D) 4
E) 2
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A homogenous mixture varies from a heterogenous mixture in that a homogenous mixture has properties that:A) do not vary in the mixtureB) vary in the mixtureC) suspend in a liquidD) dissolve a solute
A homogenous mixture varies from a heterogenous mixture in that a homogenous mixture has properties that do not vary in the mixture. The correct answer is A.
A homogeneous mixture is a mixture in which the properties and composition are uniform throughout the mixture. This means that if you took a sample from any part of the mixture, you would find the same properties and composition in that sample as you would find in the entire mixture.
In contrast, a heterogeneous mixture is a mixture in which the properties and composition vary throughout the mixture. For example, a salad is a heterogeneous mixture because you can see different ingredients such as lettuce, tomatoes, and croutons, each with different properties and composition.
So, in a homogeneous mixture, the properties do not vary, while in a heterogeneous mixture, the properties vary throughout the mixture.
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Write the rate laws for the following elementary reactions. (Rate expressions take the general form: rate = k . [H2] . [Cl2].)(a) N2O4(g) ? 2 NO2(g)(b) NO2(g) + SO2(g) ? NO(g) + SO3(g)(c) Cl(g) + ICl(g) ? I(g) + Cl2(g)(d) CH2(g) + Cl2(g) ? CH2Cl2(g)
The rate laws of the following elementary reactions are:
(a) The rate law for the decomposition of N₂O₄ is: Rate = k[N₂O₄].(b) The rate law for the reaction of NO₂ and SO₂ is: Rate = k[NO₂][SO₂]. (c) The rate law for the reaction of Cl and ICl is: Rate = k[Cl][ICl]. (d) The rate law for the reaction of CH₂ and Cl₂ is: Rate = k[CH₂][Cl₂].
The rate of a chemical reaction is a measure of how quickly a reaction occurs. It is usually expressed as the change in concentration of a reactant or product per unit time. The rate of a reaction is affected by a number of factors, including temperature, concentration of the reactants, surface area of the reactants, and the presence of catalysts.
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calculate the mass in g of agarose required to make 200 ml of a 1.2% agarose gel. record the answer to one decimal place
The mass in g of agarose required to make 200 ml of a 1.2% agarose gel is 2.4 g.
Agarose gel is defined as a three-dimensional matrix which is formed from helical agarose molecules in supercoiled bundles that are aggregated into three-dimensional structures with channels and pores through which biomolecules can pass.
Agarose gel electrophoresis is the main use of agarose gel which has proven to be an efficient and effective way of separating nucleic acids.
1.2% refers that 1.2 g of agarose is required to make 100 ml of agarose gel.
So, 200 ml of agarose gel will require 2.4 g of agarose.
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fill the blank density is--property
a. an extensive.
b. an intensive.
c. a chemical.
d. a chemical.
A sample of 0.53 gNa₂CO3, is added to 101 ml of 0.1 N H₂SO4 solution. a. Will the resulting b solution be acidic, basic or neutral?
A sample of 0.53 gNa₂CO3, is added to 101 ml of 0.1 N H₂SO4 solution. Therefore, solution will be Neutral.
What are acid, base and neutral solution?Depending on how fully an acid separates into its ions when placed in water, it can be classified either as strong or weak. In water, a powerful acid, like hydrochloric acid, totally dissociates into its ions. A weak acid barely partially separates into its ions, leaving the acid in the solution together with water and ions.
The terms Arrhenius bases, Brnsted bases, while Lewis bases refer to the three meanings of the word base that are most often used. According to every definition, bases are materials that react to acids. When hydronium as well as hydroxide ion concentrations are equal, a solution is neutral.
Na₂CO₃ + H₂SO₄ → NA₂SO₄ + CO₂ + 2H₂O
Equivalent weight of Na₂CO₃.H₂O = 62 g
weight of Sodium carbonate (Na₂CO₃) = 0.62 g.
W = {N × E × V}/{1000}
0.62 = ( N x 62 x 100 ) / 1000
N = 0.62 x 1000 / 62 x 100
N = 620/6200
N= 0.1
Normality of Na₂CO₃ and H₂SO₄ is Same that is 0.1 N . Solution will be Neutral.
Therefore, solution will be Neutral.
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