Analyte concentration is the first step.
The precise concentration of the analyte must be determined in order to produce accurate results. Concentrations are often expressed as moles per liter.
Given data in step two.
The problem's knowns are listed in the table to get things started. Data for chemicals, and were examined.
Area relative to a compound
A B C relative detector response
ye.commastmastmas, and
Determine the compound percentages in step 3.
To find the corrected area, divide the relative detector response by the relative area. The corrected area is then divided by the total corrected area, which results in the percent of the compound, which is relative detector response corrected area compound relative area .
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Analyte concentration is the first step.
The precise concentration of the analyte must be determined in order to produce accurate results. Concentrations are often expressed as moles per liter.
Given data in step two.
The problem's knowns are listed in the table to get things started. Data for chemicals, and were examined.
Area relative to a compound
A B C relative detector response and
Determine the compound percentages in step 3.
To find the corrected area, divide the relative detector response by the relative area. The corrected area is then divided by the total corrected area, which results in the percent of the compound, which is relative detector response corrected area compound relative area .
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A certain weak base has a b of 7.80×10−7. What concentration of this base will produce a pH of 10.14?
The concentration of the weak base that would produce a pH of 10.14 is 1.5 * 10^15 M.
What is the Kb?Let us recall that the Kb is simply the base dissociation constant. This is the equilibrium constant that would tell us how much of the base has been dissociated in the solution.
In this case, we can be able to write the equation of the dissociation of the base in the following way;
[tex]BH^+[/tex](aq) + [tex]H_{2} O[/tex](l) -------> [tex]B^-[/tex](aq) + [tex]H_{3} O^+[/tex](aq)
Kb = [ [tex]B^-[/tex]] [ [tex]H_{3} O^+[/tex]]/[[tex]BH^+[/tex]]
But [ [tex]B^-[/tex]] = [ [tex]H_{3} O^+[/tex]] = Antilog (-10.14)
= 7.2 * 10^-11 M
Thus;
7.80 × 10^−7 = (7.2 * 10^-11)^2/[[tex]BH^+[/tex]]
[[tex]BH^+[/tex]] = 7.80 × 10^−7/(7.2 * 10^-11)^2
[[tex]BH^+[/tex]] = 7.80 × 10^−7/5.2 * 10^-22
[[tex]BH^+[/tex]] = 1.5 * 10^15 M
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Which molecular orbital has zero nodes, contributes to bonding, and has nonzero electron density directly along the internuclear axis?
A π orbital has zero nodes contributed to bonding and it has non zero electron density localized on both sides of plane.
A completely antibonding molecular orbital has at least one node perpendicular to the internuclear axis while a completely bonding molecular orbital has no nodes (regions of zero electron probability) perpendicular to the internuclear axis. The internuclear axis is the center of symmetry for a sigma orbital (bonding) or a sigma star (*) orbital (antibonding). All cross-sections that are perpendicular to that axis are therefore circular.
A nodal plane that houses the nuclei is present in both a pi orbital (bonding) and a pi star (*) orbital (antibonding), and electron density is localized on both sides of the plane.
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Does bromine react with calcium?
Yes, Bromine reacts with Calcium to form Calcium dibromide. Calcium dibromide is a calcium salt.
Calcium Bromide formula, is also known as Calcium Dibromide formula or Calcium Bromatum formula. Calcium Bromide is formed by one calcium atom and two bromine atoms. The molecular or chemical formula of Calcium Bromide is CaBr2.
In its anhydrous form, it anhydrous is hygro-scopic colorless crystals sharp saline taste. It is soluble in water and alco-hol. It is produced by reacting calcium carbonate (CaCO3) and calcium oxide with hydrobromic acid (HBr).
Or it is made by reacting calcium metal with elemental bromine. It is widely used as a dense aqueous solution for dr-illing fluids. Also, it has a wide application in as neurose-s medication, food preservatives, freezing mixtures, fire reta-rdants, and in photography.
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What type of reaction is 2 CO o2 → 2 co2?
The reaction 2CO+O₂ → 2CO₂ is a combustion as well as combination reaction.
The balanced chemical equation of the reaction of carbon monoxide with Oxygen gas to produce carbon dioxide is given as,
2CO+O₂ → 2CO₂
As you can see from the above reaction carbon monoxide is getting combusted because of the presence of Oxygen gas to produce carbon dioxide. So, we can say this is a combustion reaction.
Also as we can see that carbon monoxide and Oxygen gas is combining to produce carbon dioxide so we can say that it is a combination reaction as well.
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How many DNA molecules would there be after four rounds of PCR if the initial reaction mixture contained two molecules?
There would be 16 DNA molecules after four rounds of PCR if the initial reaction mixture contained two molecules.
An Analysis of Four Rounds of PCR with an Initial Mixture of Two DNA MoleculesPolymerase Chain Reaction (PCR) is a powerful technique used to amplify a specific region of DNA. It is a technique that involves the repeated cycles of denaturing, annealing, and extending DNA strands. The initial reaction mixture contains two DNA molecules.
During each cycle of PCR, the DNA molecules are replicated, resulting in a doubling of the amount of DNA. Therefore, after four rounds of PCR, the initial two molecules would be multiplied by two four times, resulting in a total of 16 DNA molecules.
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The Dutch scientist Johannes van der Waals developed a useful equation to predict the behavior of real gases. In the van der Waals equation, what are the constants a and b, respectively?
a. a is a measure of how strongly the gas molecules attract one another, and b is a measure of the finite volume occupied by the molecules.
b. a is a measure of the random motion of gas molecules, and b is a measure of the volume of the container.
c. a is a measure of the finite volume occupied by the molecules, and b is a measure of how strongly the gas molecules attract one another.
d. a is a measure of the molecular mass of the gas molecules, and b is a measure of the finite volume occupied by the molecules.
Answer:
Explanation:
The higher the value of a, the greater the attraction between molecules and the more easily the gas will compress.
The b term represents the excluded volume of the gas or the volume occupied by the gas particles.
(the following problems involve using the gas laws.) 1. a 7.89 liter sample of gas has a pressure of 850 torr. what volume will it occupy if the pressure is changed to 457 torr? (760 torr
The changed pressure according to Charles law is 14.723l.
What is Charles law ?
Charles' law asserts that a gas's volume is equal to a constant number times the temperature of that gas, as determined by the Kelvin scale (zero Kelvin corresponds to -273.15 degrees Celsius).
What is pressure ?
The SI unit for pressure, the pascal (Pa), which equals one newton per square metre (N/m2) of surface area, is the measure of pressure. An object's pressure is inversely proportional to its area under which it is being forced and is directly proportional to the force it generates.
PV= nrT
PV/T=K
so, P1 V1/ T1 = P2 V2/T2
=P1 V1 = P2V2 (Boyles law)
data given,
V1= 7.89l
P1= 850 for r
P2= 457 for r
V2 = ?
850*7.89=457*V2
V2=850*7.89/457= 14.6750l
According to the charles law
V propotional to T
V1/T1 = V2/T2
=6.50/298= V2/675
V2=6.50/298*675=14.723l
Therefore, the changed pressure according to Charles law is 14.723l.
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What is the appropriate order of steps when responding to a hazardous material release?
Rescue, Confine, Report, Secure, Cleaning is the appropriate order of steps when responding to a hazardous material release
The basic processes for responding to hazardous material spills include:
RESCUE - Evacuate the vicinity of the spill. Include the usage of safety showers and eyewashes in your aid. Once thoroughly decontaminated, seek immediate medical attention.
CONFINE - Confine the spill area by shutting the doors closest to it. Isolate infected individuals and forbid them from leaving or spreading the infection. Cover drains to avoid environmental contamination.
REPORT - Report the spill immediately to the relevant emergency response office, as detailed below in the material-specific spill cleaning protocols. Provide details on wounded personnel, the sort of hazardous substance spilled, the approximate amount, and the location.
SECURE - Ensure no one approaches the spill location until emergency response workers arrive by securing the area until their arrival. If the location has many entries, make careful to station someone at each one to prevent admission.
Cleaning - Only trained individuals with the proper training, protective equipment, and cleanup supplies may do cleanup. Depending on the form and extent of the spill, skilled department or laboratory personnel may be able to clean it up as described below. Otherwise, emergency response personnel are accessible 24 hours a day, seven days a week.
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What is the bonding activity between phosphorus and chlorine?
The bond formed between phosphorus and chlorine will be Covalent Bond.
Both phosphorous and chlorine are located on the right side of the periodic table where nonmetals are located.
This means both elements are nonmetals with lower electronegativity gap,
So will form a covalent bond.
Covalent Bond: A covalent bond consists of the mutual sharing of one or more pairs of electrons between two atoms.
A covalent bond is formed when the electronegativity difference of two atoms is too small for an electron transfer to occur to form ions.
The electronegativity difference between two atoms determines how polar a bond will be.
In a diatomic molecule with two identical atoms, there is no difference in electronegativity, so the bond is nonpolar or pure covalent.
In this case, chlorine is more electronegative than that of Phosphorous, making it polar covalent bond.
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List the cell organelles and describe their functions
Answer:
Nucleus - Stores the DNA of the cell, and is the main control center of the cell.Ribosomes - Performs protein synthesis.Endoplasmic Reticulum - Stores calcium and performs protein synthesis.Mitochondria - Converts energy from food into energy the cell can use.Golgi Apparatus - Transports proteins around the body.Chloroplast - Only found in plant cells - Produce energy through photosynthesis.Cytoplasm - Keeps other organelles secure and helps to transport things around the cell.(Everything except the chloroplast is found in both plant and animal cells.)
g under constant-pressure conditions a sample of hydrogen gas initially at and is cooled until its final volume is . what is its final temperature? round your answer to significant digits.
g under constant pressure conditions, a sample of hydrogen gas is cooled until its final volume and temperature are, respectively, and its final temperature is 96.10 kelvin
Charles Slow asserts that the volume occupied by a certain quantity of gas is directly inversely related to that gas's absolute temperature. The steady pressure is Charles. In the case of constant pressure, v 1 byt 1 and p 2 byt 2 are equivalent. It is equivalent to 7.70 liters and 23 degrees, while 2 is equivalent to 2.50 and 1 to 2.50. We are given 96.10 kelvin.
A sample of hydrogen gas is cooled to a final volume and temperature of under constant pressure conditions, and the final temperature of the hydrogen gas is 96.10 kelvin.
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What is the STP in 1 mole of a gas in the volume of the container?
Answer:
STP stands for Standard Temperature Pressure. 1 mole of any gas at STP is 22.4 liters.
Explanation:
The phrasing of the question makes it difficult to understand what is being sought. Given no additional information, the important concept in the gas laws is the fact that 1 mole of any gas occupies the same volume: 22.4 liters (L). This makes a very usefil conversion factor of 22.4L/mole. The gas laws allow the calculation of moles even at non-standard pressure and temperature conditions. The combined gas law will produce a revised volume at STP from conditions other than STP. Then the moles of gas can be found with this conversion factor.
What is the amount of charge on a calcium ion if its neutral atom has lost two valence electrons?
2+ charge is the amount of charge on a calcium ion if its neutral atom has lost two valence electrons.
What is Charge?
Wave energy that travels longitudinally is charge. The relationship between mass and charge may be reduced to a single energy equation, which is shown on this page in classical form. Coulombs may be explained as wave amplitude, which is measured as a distance, to connect mass and charge (meters).
The physical characteristic of matter that allows it to feel a force when exposed to an electromagnetic field is called electric charge.
The two types of electric charges that protons and electrons most frequently carry are positive and negative charges.
Charge movement is what produces energy.
The energy generated by the charge might be thermal, chemical, or electrical energy, depending on the environment or atmosphere in which it is put.
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what role do cfcs play in the catalytic destruction of ozone? what role do cfcs play in the catalytic destruction of ozone? there is no strong scientific evidence that cfcs play a significant role in the catalytic destruction of ozone. ozone is destroyed upon binding to a cfc molecule that has been energized by ultraviolet light. cfc molecules activate chlorine atoms into their catalytic action. cfc molecules migrate to the upper stratosphere where they generate chlorine atoms upon being destroyed by ultraviolet light.
When gaseous CFCs gradually ascend into the stratosphere, are broken down by potent ultraviolet light, release chlorine atoms, and then interact with ozone molecules, they can reduce the amount of ozone in the atmosphere. ) in the form of aerosol (see Ozone Depleting Substance.
What acts as a catalyst to destroy ozone?Because Cl and ClO are generated every time the reaction cycle is finished and are thus available for additional ozone destruction, chlorine is thought of as a catalyst for ozone degradation. O3 and O2 molecules react with solar ultraviolet (UV) radiation to produce atomic oxygen.
What part does CFC play in the atmosphere?Molina discovered that chlorofluorocarbons (CFCs) might destroy the ozone layer in the Earth's atmosphere, which shields the planet from the sun's harmful UV rays.
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An organic compound that is distilled from wood has a molar mass of 32.04 g/mol. its composition by mass is 37.5% carbon, 12.6% hydrogen, and 49.9% oxygen. Draw the Lewis structure of this compound.
The compound has SP3 hybridization and total of 14 valence electrons in its shell. we found this from the Lewis structure.
Distilled from wood Molar mass of organic compound is 32.04g/mole.
molar mass of carbon is 12 g/mole.
molar mass of hydrogen is 1g/mole.
molar mass of oxygen is 16g/mole.
The composition of organic compound by its mass is 37.5% carbon, 12.6% hydrogen, and 49.9% oxygen.
so, we can calculate the number of mole.
so, number of moles of C is, 37.5/ 12 = 3.13
number of moles of H is 12.6 / 1 = 12.6
number of moles of O is 49.9/ 16= 3.12
The molar ratio of carbon, hydrogen and oxygen is ,
C : H : O = 3.13 : 12.6 : 3.12
=1 : 4 : 1
So from this we found the empirical formula. The empirical formula of compound is CH4O.
valence electron of c is, 4.
valence electron of H is 4
valence electron of O is 6.
so the total valence electron is 14.
Form this we can draw the Lewis structure. A Lewis Structure is a very simplified representation of the valence shell electrons in a molecule. It is used to show how the electrons are arranged around individual atoms in a molecule. Electrons are shown as "dots" or for bonding electrons as a line between the two atoms. This have SP3 hybridization.
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What type of bond is CH2O polar or nonpolar?
Answer:
a polar compound.
Explanation:
This is because of the unbalanced electron density.
If a number in scientific notation has a POSITIVE exponent, the number in standard form will have
Positive exponent means bigger number
Negative exponent is smaller - means that its in the denominator.
example:
[tex]2^{2} = 4[/tex]
[tex]2^{-2} =\frac{1}{2^2} = \frac{1}{4}[/tex]
suppose that daniel has a 3.00 l bottle that contains a mixture of o2 , n2 , and co2 under a total pressure of 4.90 atm. he knows that the mixture contains 0.250 mol n2 and that the partial pressure of co2 is 0.250 atm. if the temperature is 273 k, what is the partial pressure of o2 ?
The partial pressure of O2 in bottle with 3L that contains mixture of O2 , N2 and CO2 under a total pressure of 4.9 atm is 2.53 atm.
The total moles of gas present can be calculated using the ideal gas law as follows:
PV = nRT
PV/RT is equal to n = (4.90 atm)(3.00 L)/(0.0821 Latm/Kmol) (273K)
gas at n = 0.656 moles
Find the N2 pressure:
Mole fraction of N2 is equal to 0.270 mol/0.656 mol, or 0.412.
N2 pressure is equal to 0.412 x 4.90 x the mole fraction of total pressure, or 2.02 atm.
We can now get the partial pressure O2 since total pressure = pressure O2 + pressure N2 + pressure CO2.
4.90 atm minus 2.02 atm minus 0.350 atm equals 2.53 atm.
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what is the naming rule for PtS2?
Platinum sulfide.............
What does a half-life of 30 minutes mean?
A half-life of 30 minutes after the drug administration, 25 mg of the drug remains in the body.
In radioactivity, the half-life is the period of time needed for half of a radioactive sample's atomic nuclei to spontaneously decay (convert into different nuclear species by emitting particles and energy) or, more precisely, the period of time needed for a radioactive material's rate of disintegrations per second to decrease by half. An example of a radioactive isotope with a long half-life is cobalt-60, which is utilised in radiotherapy. A sample that contained 8 g of cobalt-60 when it was first prepared would now only contain 4 g of the metal after that time period, and it would produce half as much radiation. The sample would only contain 2 g of cobalt-60 after an additional 5.26-year delay
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when a narrow diameter glass tube is inserted into a body of water, water rises in the tube and its surface inside is concave upwards. which statement, concerning the strength of the intermolecular forces between glass and water molecules compared to those between water molecules, is accurate?
The statement that is true is 4 which says, the forces of attraction between the glass and water are stronger than those in water.
Statement 4) is accurate as the force of attraction between the water and walls of glass vessel i.e. adhesion of water to the walls of the glass Vessel causes an upward force on water at the edges and results in meniscus
( Concave shaped ) which turns upward and this adhesive force dominates the cohesive forces within the water. Surface tension is the phenomenon behind this shape.
Therefore, statement 4 is the correct choice.
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You are given a compound with the formula mcl2, in which m is a metal. You are told that the metal ion has 27 electrons. What is the identity of the metal?.
The metallic ion that has 27 electrons and that when united with chlorine forms CoCl2 is cobalt.
The number of electrons is equal to the number of protonsIn a neutral atom, the number of electrons will be equal to the number of protons, so the number of electrons can be easily determined from the atomic number.
In this case, the metal ion has 27 electrons.
And since electrons = protons (P+)
And since Z (atomic number) is equal to P+
Then
z=27
And in the periodic table the element with Z equal to 27 is cobalt
And the compound that would be forming would be CoCl2
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a compound is found to have an empirical formula of ch2o. what is the molecular formula when the molecular weight is 180.0 grams?
Molecular formula of a compound is C₆H₁₂O₆.
Let's find the Molar mass of Carbon=12.
Molar mass of Hydrogen=1.
Molar mass of Oxygen=16.
Mass of CH₂O =12+2(1)+16=30.
Molecular weight of the compound given is 180.
So, the molecular weight is 180/30 =6.
⇒ Molecular formula of a compound is C₆H₁₂O₆.
What is the molecular formula of the empirical formula CH2O?
The molecular formula of an organic molecule with a molar mass of 60 grams per mole and an empirical formula of CH2O is C2H4O2.
What is the molecular weight of CH2O?
30.031 g/mol
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.
PLEASE HELP ASAP:
Two objects are placed a certain distance from each other. The amount of gravitational force between the two objects depends on their masses and the distance between them. As the masses of the objects decrease, the force of gravity between them _____________. As the distance between the objects decreases, the force of gravity between them ______________.
Two objects are placed a certain distance from each other. The amount of gravitational force between the two objects depends on their masses and the distance between them. As the masses of the objects decrease, the force of gravity between them increases. As the distance between the objects decreases, the force of gravity between them decreases.
What is gravitational force?Gravitational force is defined as the force of attraction that a body of mass M, exerts on another body that is found within its region of space that this force acts.
The law of gravitational attraction states that the gravitational force of attraction between two bodies of masses m₁ and m₂ is directly proportional to the product of their asses and inversely proportional to the square of the distance between them, r.
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Is acetic acid soluble in isopropyl alcohol?
Acetic acid and isopropyl alcohol are fully soluble in water
What makes acetic acid and isopropyl alcohol-water soluble?The form of acetic acid and isopropyl alcohol are: The acidic hydrogens are appeared by the arrow in the two systems. As we can see, the O-H bond is attending in both these compounds. Since the O-H bond is highly polar, these compounds are also highly set off, and hence, they are soluble in water.
Acetic acid, however, is quite soluble. This is easy to describe using the small alcohol vs large alcohol argument: hydrogen bonding alcohols are usually more soluble in water than alcohols of the same molecular mass.
So we can conclude that Isopropyl alcohol is soluble in water because it can form strong hydrogen bonds with the water.
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which is the smallest of the subatomic particles? group of answer choices isotope neutron electron proton
The electrons are both smaller and lighter than protons and neutrons.
What is sub atomic particles ?
Anything that is smaller than an atom is referred to as a subatomic particle. Typically, protons, electrons, and neutrons can be used to break down an atom into its three subatomic components.
What is electron?
It is possible for an electron to be free or bound to an atom,There are three main types of particles in an atom: protons, neutrons, and an electron that is bonded to an atom. The nucleus of an atom is composed of protons, neutrons, and electrons.
One electron, proton, and neutron are each made of several quarks. However, when it comes to chemistry, electrons are both smaller and lighter than protons and neutrons.
Therefore, the electrons are both smaller and lighter than protons and neutrons.
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HELP PLEASE 100 POINTS WILL GIVE BRAINLIEST IMAGE BELOW
Answer:
C
Explanation:
When light rays parallel to the principal axis are incident on the convex lens, they are converged at the focus. This can be demonstrated using the following figure. Since the rays converge, the image formed is point-size, which is highly diminished.
a solid with a mass of 19.3 g is added to a graduated cylinder filled with water to the 25.0 ml mark. after the solid sinks to the bottom, the water level is at 35.8 ml. what is the density of the solid?
The density of the solid is 1.79 g/mL
given that :
mass of the solid = 19.3 g
volume of the object = the volume change , when the object is immersed in to it.
volume of solid = 35.8 mL - 25 mL
volume of solid = 10.8 mL
the density of the solid is given as :
D = m / v
D = density of solid
m = mass of solid
v = volume of solid
D = 19.3 / 10.8
D = 1.79 g/mL
Thus, A solid with a mass of 19.3 g is added to a graduated cylinder filled with water to the 25.0 ml mark. after the solid sinks to the bottom, the water level is at 35.8 ml. the density of the solid is 1.79 g/mL.
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using postulates of kinetic molecular theory, select the statement(s) that correctly describe(s) the assumptions used to define an ideal gas as distinct from a real gas. multiple select question. the actual volume of the gas particles is negligible compared to the container volume. gas particles are separated by relatively large distances. gas particles do not exert attractive or repulsive forces on one another.
Following are the KMT's five central tenets: The particles in a gas are constantly moving at random speeds, their total volume is tiny, they do not interact with one another physically, and their collisions are entirely elastic.
The kinetic molecular theory has how many postulates?Gases will depart from the ideal gas law when the Kinetic Molecular Theory's five postulates fail, and there are five postulates in total.
What are the eight tenets of the gas kinetic theory?The relationship between a gas particle's average kinetic energy and temperature is direct. The speed at which the gas molecules move rises with temperature.
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a mixture of neon and oxygen gases at a total pressure of 652 mm hg contains neon at a partial pressure of 351 mm hg. if the gas mixture contains 2.34 grams of neon, how many grams of oxygen are present?
The grams of oxygen are present is 3.2 gram.
The partial pressure of an individual gas is same to the whole pressure improved with the aid of the mole fraction of that gas. because it is established completely on the wide variety of particles and no longer the identification of the gasoline, the correct fuel Equation applies just as well to combinations of gases because it does to pure gases.
Partial pressure is extremely essential in predicting the movement of gases. do not forget that gases generally tend to equalize their strain in two areas which are related. A gas will pass from a place in which its partial strain is higher to a place wherein its partial stress is lower
Calculation:-
Total pressure = 652 mm hg
partial pressure pressure of neon is = 351 mm hg.
pressure of oxygen is = 301 mm of Hg
mass of Oxygen = 2.34 grams
mole = 2.34/20
= 0.117
partial pressure = mole/total mole × total pressure
351 mm hg = 0.117 / total mole × 652
Total mole = (0.117 × 652 ) / 351
= 0.217
partial pressure of Oxygen = mole /total mole × total pressure
mole = (301 × 0.217)/ 652
= 0.1
mole = mass/molar mass
mass = mole × molar mass
= 0.1 × 32
= 3.2 gram
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