Partial pressure of helium gas in the tank is 162.24 atm.
Partial Pressure:
A partial pressure is the imaginary pressure that a gas would have if it were to occupy the complete volume of the initial mixture by itself at the same temperature. Each gas in a mixture of gases has a partial pressure.
Explanation:
Total pressure in Heloix (P) = 208 atm
The mole fraction of an individual gas component in an ideal gas mixture can be expressed in terms of the component's partial pressure or the moles of the component
Mole fraction of oxygen (X₀) = 0.220
The sum of the mole fractions of all the components present must equal 1.
Mole fraction of helium (Xₐ) = 1-(X₀) = 1- 0.220= 0.78
According to Dalton's law of partial pressure.
Partial pressure of an individual gas component in an ideal gas can be obtained using this expression:
Partial pressure of oxygen gas in Heloix: P*X₀ = 208 * 0.22 = 45.76 atm
Partial pressure of helium gas in Heloix: P*Xₐ = 208 * 0.78 = 162.24 atm
Partial pressure of helium gas is 162.24 atm.
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The reaction na 3po 4( aq) 3 agno3( aq) → ag 3po 4( s) 3 nano 3( aq) is best classified as a(n):_____.
The reaction [tex]Na_{3} PO_{4} ( aq) +3AgNO_{3} (aq)[/tex] → [tex]Ag_{3} PO_{4} ( aq) +3NaNO_{3} (aq)[/tex] is best classified as double displacement reaction.
Those reaction in which two compounds react by exchanges of ions to form two new compounds is called double displacement reaction. The easiest way to identify double displacement reactions is to check to see whether the cations exchanged anions with each other or not . Always balanced chemical equation is used to determine.
There are three types of double displacement reaction which is given as,
Precipitation Neutralization Gas formationThe real world example of double displacement reaction is combining vinegar and baking soda to create homemade volcano.
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When removing nail wraps, it is recommended that when the client places her hand in the bowl of acetone, the acetone be about ____ above the nail wraps.
When removing nail wraps, it is recommended that when the client places her hand in the bowl of acetone, the acetone be about fully covered above the nail wraps.
What is nail wraps?Nail wraps, often known as nail paint strips, are nail improvements with printed patterns, glitter, or solid colors. Without the use of glue, they are attached to the nail in a flexible strip. There may be 12 to 22 various sized strips per box, depending on the manufacturer, which takes into account the range in size of each person's fingernail.
Nail wraps have a long history that dates back to the 1980s. The popularity of nail polish and the rise in salon visits gave rise to the demand for a better at-home manicure. Although several companies produced nail wraps and polish strips, it wasn't until the 2000s that they truly started to catch popularity. Since then, their appeal has increased.
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The isotope ra decays to rn by emitting radiation. What type of radiation is emitted?
Heavy elements such as radium, uranium, and thorium, all have alpha decaying nuclei. An Rn (radon) nuclei are created when a Ra (radium) nucleus decays, emitting an alpha particle in the process.
Discussion about radiation:
The radioactive process known as alpha decay, sometimes known as α radiation, involves the ejection of an alpha particle from the nucleus, which includes 2 neutrons and 2 protons.
A helium atom's nucleus and an alpha particle have many similarities. Instability is seen as being present in all nuclei with an atomic number (Z) more than 82. These are frequently subject to alpha decay and are thought to be "neutron-rich." Heavy elements such as radium, uranium, thorium, etc., all have alpha decaying nuclei. An Rn (radon) nucleus is created when a Ra (radium) nucleus decays, emitting an alpha particle in the process.The mass number (A) and atomic number (Z) are typically lowered by two and four, respectively, during alpha decay. For instance, Ra-226 with atomic numbers 88 and 226 is converted into Rn-222 with the mass number 222 and atomic number 86 by alpha decay.Learn more about alpha decay here:
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A blue train of mass 50 kg moves at 4 m/s toward a green train of 30 kg initially at rest. The trains collide. After the collision the green train moves with a speed of 3 m/s. What is the final momentum of the blue train?
A. 110 kgm/s
B. 200 kgm/s
C. 20 kgm/s
D. 90 kgm/s
16. If the velocity of hydrogen molecule is 5 x 10^4cm sec-¹, then its de Broglie wavelength is
(1)2 A
(2) 4 A
(3)8 A
(4) 100 A
Answer:
Correct option is B)
According to de-Broglie,
λ=mvh=6.023×10232×5×104cm/sec6.62×10−27ergsec=4×10−8cm=4Ao
Carbon dioxide is considered a waste product of cellular respiration.
a. true
b. false
Answer: True
Explanation:
What is the total pressure exerted by a mixture of 48.0 grams of CH4 and 56.0 grams of
hydrogen gas when confined in a volume of 15.0 liters at 13°C.
The pressure of the gas is obtained as 48 atm.
What is the total pressure?Now we know that;
Number of moles of CH4 = 48.0 grams /16 g/mol = 3 moles
Number of moles of H2 = 56.0 grams/2 g/mol = 28 moles
Total number of moles present = 3 moles + 28 moles = 31 moles
Using;
PV =nRT
P = total pressure
V = total volume
n = total number of moles
R = gas constant
T = temperature
P = nRT/V
P = 31 * 0.082 * 286/15
P = 48 atm
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How many moles of na2co3 are necessary to reach stoichiometric quantities with cacl2
0.0102 moles Na₂CO₃ = 1.08g of Na₂CO₃ is necessary to reach stoichiometric quantities with cacl2.
Explanation:Based on the reaction
CaCl₂ + Na₂CO₃ → 2NaCl + CaCO₃
1 mole of CaCl₂ reacts per mole of Na₂CO₃
we have to calculate how many moles of CaCl2•2H2O are present in 1.50 g
We must calculate the moles of CaCl2•2H2O using its molar mass (147.0146g/mol) in order to answer this issue. These moles, which are equal to moles of CaCl2 and moles of Na2CO3, are required to obtain stoichiometric amounts. Then, we must use the molar mass of Na2CO3 (105.99g/mol) to determine the mass:Moles CaCl₂.2H₂O:1.50g * (1mol / 147.0146g) = 0.0102 moles CaCl₂.2H₂O = 0.0102moles CaCl₂
Moles Na₂CO₃:
0.0102 moles Na₂CO₃
Mass Na₂CO₃:
0.0102 moles * (105.99g / mol) = 1.08g of Na₂CO₃ are present
Therefore, we can conclude that 0.0102 moles Na₂CO₃ is necessary.to reach stoichiometric quantities with cacl2.
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What type of interaction occurs between the r groups of valine and isoleucine in a tertiary structure? hydrogen bond salt bridge disulfide bridge hydrophobic interaction
The type of interaction occurs between the r groups of valine and isoleucine in a tertiary structure will be "hydrophobic interaction".
The only factor responsible for the hydrophobic attraction connecting molecules or particles submerged in water would be the AB free energy of cohesiveness between both the water molecules. Regardless of whether the molecules as well as, particles are submerged in water or not, this interaction always exists.
The entire three-dimensional configuration of a protein's polypeptide chain in space is referred to as the protein's tertiary structure. It is typically stabilized through interactions between the side chains of nonpolar amino acids with externally polar hydrophilic hydrogen as well as ionic bonds.
Therefore, the type of interaction occurs between the r groups of valine and isoleucine in a tertiary structure will be "hydrophobic interaction".
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CH3OH ___ ions in an aqueous solution. A) forms B) does not form
CH3OH doesn't form ions in an aqueous solution.
Water and one or more dissolved substances make up aqueous solutions. In an aqueous solution, solids, gases, or other liquids may dissolve. Examples of watery solutions include coke, seawater, rain, acid, base, and salt solutions. A solution that is not an aqueous solution is any liquid that does not contain water.
Solutions that contain water as the solvent are known as aqueous solutions. Water is a great solvent, but not everything will easily dissolve in it. The term "aqueous" in a chemical equation designates a material in water. For instance, adding sodium hydroxide solution to diluted hydrochloric acid results in the production of sodium chloride.
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During the process of heat transfer, the heat transferred to or from a system's surroundings is always?
Answer:
During the process of heat transfer, the heat transferred to or from a system's surroundings is always equal in magnitude to the heat transferred to or from the system, but opposite in sign.
What is the 1st law of thermodynamics?
The total energy of an isolated system is said to stay constant according to the first rule of thermodynamics. Energy cannot be generated or destroyed, but it may be transformed from one form into another inside a closed system, which is known as the conservation of energy.
This rule states that when a system is exposed to a certain amount of heat, the amount of heat that the system absorbs is equal to the product of the increase in internal energy (change in internal energy) of the system and the external work that the system does. The relationship between a system's internal energy and work output and the heat given to it is demonstrated by the first law of thermodynamics. This equation provides the foundation for the majority of practical innovations like heat engines, freezers, and air conditioners.
The equation for the first law of thermodynamics is given as; ΔU = q + W
Where,
ΔU = change in internal energy of the system.q = algebraic sum of heat transfer between system and surroundings.W = work interaction of the system with its surroundings.The heat transported to or from a system's surroundings during the process of heat transfer is always opposite in sign, but equal in size, to the heat transferred to or from the system.
What is heat transfer?
The flow of thermal energy between physical systems is known as heat transfer. The temperatures of the systems and the characteristics of the medium used to transmit the heat affect how quickly it transfers. Conduction, convection, and radiation are the three basic ways that heat is transferred. It is crucial to employ heat transfer, or the movement of energy in the form of heat, in applications of the First Law of Thermodynamics since it is a mechanism through which a system changes its internal energy. Diffusion and conduction are two different concepts. Diffusion linked to fluid mixing is not the same as conduction.
The Second Law of Thermodynamics controls the direction of heat transmission, which is from one area of high temperature to another area of lower temperature. The internal energy of the systems from and to which the energy is transmitted is altered during heat transfer. Heat transfer will take place in a way that makes the group of systems' entropy higher.
In physics, heat is described as the flow of thermal energy over a boundary that is clearly defined surrounding a thermodynamic system. The amount of work that a thermodynamic system may accomplish is known as the thermodynamic free energy. Enthalpy is a thermodynamic potential with the letter "H" that is made up of the system's internal energy (U) plus the volumetric product of pressure (P) and temperature (T) (V). A joule is a unit used to measure energy, effort, or heat production.
The quantity of heat transmitted in a thermodynamic process that modifies a system's state relies on how that process happens, not just the net difference between the process' beginning and ending states, since heat transfer is a process function (or route function), as opposed to a function of state.
The heat transfer coefficient, which represents the relationship between the heat flux and the thermodynamic force that drives the flow of heat, is used to determine both thermodynamic and mechanical heat transfer. A quantitative, vectorial description of the movement of heat through a surface is called a heat flux.
The term "heat" is sometimes used interchangeably with "thermal energy" in technical applications. This usage derives from the historical understanding of heat as a fluid (caloric) that may be transported by a variety of reasons, which is also prevalent in laypeople's language and daily life.
Thank you,
Eddie
When an electron in a quantum system drops from a higher energy level to a lower one, the system __
When an electron in a quantum system drops from a higher energy level to a lower one, the system emit a photon.
The energy of the electron drops when it transitions levels, as well as the atom releases photons. The emission of the photon occurs as the electron transitions from an energy state to a lower state. The photon energy represents precisely the energy that would be lost when an electron moves to a level with less energy.
When such an excited electron transitions from one energy level to another, this could emit a photon. The energy drop would be equivalent to the power of the photon that is released. In electron volts, the energy of an electron, as well as its associated photon (emitted or absorbed) has been stated.
Therefore, when an electron in a quantum system drops from a higher energy level to a lower one, the system emit a photon.
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A volume of oxygen gas occupies 38. 7 ml at 751 mmhg and 21°c. what is the volume if the pressure changes to 359 mmhg while the temperature remains constant?
Answer:
80.96 L
Explanation:
START WITH
P1 V1 = P2 V2
V2 = P1 V1 / P2
= 751 * 38.7 / 359 = 80.96 L
According to Boyle's law, where the temperature remains constant the volume of the gas if the pressure changes to 359 mm Hg is 80.95 ml.
What is Boyle's law?Boyle's law is an experimental gas law which describes how the pressure of the gas decreases as the volume increases. It's statement can be stated as, the absolute pressure which is exerted by a given mass of an ideal gas is inversely proportional to its volume provided temperature and amount of gas remains unchanged.
Mathematically, it can be stated as,
P∝1/V or PV=K. The equation states that the product of of pressure and volume is constant for a given mass of gas and the equation holds true as long as temperature is maintained constant.
According to the equation the unknown pressure and volume of any one gas can be determined if two gases are to be considered.That is,
P₁V₁=P₂V₂
Substitution in the above equation gives ,V₂=751×38.7/359=80.95 ml.
Thus, the volume of gas at 359 mm Hg pressure is 80.95 ml.
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Which of these molecules have all atoms lying in the same plane? a. cbr4 and nh3 b. pf5 c. nh3 and hcn d. so3 and hcn
Molecules having all atoms lying in the same plane is c) HCN
HCN is a molecule in which all the atoms in the same plane i.e. it is a Planar molecule.
A Planar molecule is the one in which atoms are arranged in same plane i.e. atoms arrange themselves to exist in a two dimensional plane around the central atom.
The presence of double bond or triple bond in a molecule allows the molecule to get arranged in a plane.
The presence of triple bond in HCN allows it to be arranged in a plane.
HCN to be specific is a Linear molecule in which the angle between H and CN is 180.
The bond between C and N atom is a triple bond containing two pie bonds and one sigma bond.
Hence c) HCN is a planar molecule.
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Calculate the approximate amount os sodium hydroxide needed to make 500ml if a. 3 naoh solution.
6 gram of sodium hydroxide (NaOH) needed to make 500ml if 0.3 NaOH solution.
What is molarity?Molarity (M) is the amount of a substance in a certain volume of solution.
Molarity is defined as the moles of a solute per liters of a solution.
The unit of molarity is mol/L.
Volume of NaOH = 500 mL
Molarity of the aqueous solution = 0.3 M
Molar mass of NaOH= (23+16+1) g = 40g
Let the mass of NaOH be X.
Now , according to formula number of moles of a given substance = given mass / molar mass
Therefore, no. of moles of NaOH = X/40
Since, molarity = number of moles of solute/ volume of solution in liter.
Hence, 0.3 = ( X /40) / (500 / 1000)
Solving this we get X= 6g
6 gram of sodium hydroxide (NaOH) needed to make 500ml if 0.3 NaOH solution.
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If ionizing radiation interacts with a human cell, causing it to die after one or more divisions, it is classified as:____.
If ionizing radiation interacts with a human cell, causing it to die after one or more divisions, it is classified as mitotic death.
Hence, Option C is correct answer.
What is Ionizing radiation ?Ionizing radiation is a form of energy which is released by atoms that travels in the form of electromagnetic waves.
Examples: Heat or light from the Sun.
What is Mitotic Death ?Radiation damage to the cell death occurs when cells to attempt to divide with the damaged DNA.
Thus from the above conclusion we can say that If ionizing radiation interacts with a human cell, causing it to die after one or more divisions, it is classified as mitotic death.
Hence, Option C is correct answer.
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Disclaimer: The question was given incomplete on the portal. Here is the complete question.
Question: If ionizing radiation interacts with a human cell, causing it to die after one or more divisions, it is classified as
(A) interference of function
(B) mitotic delay
(C) mitotic death
(D) reproductive death
Place the following in order of increasing dipole moment. I. Bcl3 ii. Bif2 iii. Bclf2.
The correct order of increasing dipole moment is BCl3 < BIF2 < BClF2.
What is dipole moment?
The mathematical product of the separation of the ends of a dipole and the magnitude of the charges.More is the electronegativity of an atom more it will have pull of electrons towards itself. For example, in BCl3 electrons will be pulled towards chlorine atom as it is more electronegative than boron.Hence, the dipole moment is cancelled out. So, it will have zero dipole moment. In BIF2 and BClF2 , fluorine is more electronegative in nature and it is present in both the molecules.But chlorine is more electronegative that iodine atom. So, the dipole moment of BClF2 is more than the dipole moment of BIF2.To learn more about dipole moments: https://brainly.com/question/14355450
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How many grams are in 0. 743 mol of al?
There are 20.046 grams in 0.743 moles of Al.
Mole is the SI unit of measurement of the matter present inside any substance or element. It is denoted by the 'n'.
The formula of finding mole is
n = mass / molar mass
According to the question, to find the mass of Al the formula can be rewritten as mass = moles × molar mass.
Molar mass of Al = 26.98 g/mol.
Moles of Al = 0.743 moles
Therefore, mass of Al = 0.743 moles × 26.98 g/moles
Hence, mass = 20.046 grams
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A gas sample at stp contains 1. 20 g oxygen and 1. 43 g nitrogen. what is the volume of the gas sample?
The volume of the gas sample will be 1.79 L.
A liquid, solid, or gas's volume represents the amount of three-dimensional space it occupies. Although there are many additional units that can be used to indicate volume, the most used ones are liters, cubic meters, gallons, milliliters, teaspoons, as well as ounces.
Given data :
Mass of [tex]O_{2}[/tex] = 1.20 g
Mass of [tex]N_{2}[/tex] = 1.43 g
Number of moles can be calculated by suing the formula:
Number of moles of [tex]O_{2}[/tex] = Mass / molar mass = 1.20 / 32 = 0.03 mol
Number of moles of [tex]N_{2}[/tex] = Mass / molar mass = 1.43 / 28 = 0.05 mol
So, the total count of moles can be calculated by :
Total moles = moles of [tex]O_{2}[/tex] + moles of [tex]N_{2}[/tex]
Total moles = 0.03 + 0.05 = 0.08 mol
The volume of the gas at STP can be calculated as:
Volume = 0.08 mol × 22.4 mol/L
Volume = 1.79 L
Therefore, the volume of the gas sample will be 1.79 L.
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Rounding to the nearest
tenth, what is the mean of
85, 85, 100, 90, 100, 85,
80, 100, 90?
For calculating mean value, add up all of the values then divide by the number of them. 815/9 is about 90.6
What is mean value?The mean refers to the average of a set of values. The mean can be computed in a number of ways, including the simple arithmetic mean (add up the numbers and divide the total by the number of observations), the geometric mean, and the harmonic mean.
Moreover, the mean can be used to represent the typical value and therefore serves as a yardstick for all observations. For example, if we would like to know how many hours on average an employee spends at training in a year, we can find the mean training hours of a group of employees.
Hence, the mean can be calculated only for numeric variables, no matter if they are discrete or continuous. It's obtained by simply dividing the sum of all values in a data set by the number of values.
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Write the formula for: strontium carbonate
What reagent is needed to convert 1-hexyne to 2-hexanone?
(a) o3 /zn/ h3o
(b) pcc (pyridinium chlorochromate)
(c) bh3 /h2o2 /oh-
(d) h2o/h
The reagent is needed to convert 1-hexyne to 2-hexanone is [tex]H_{2}O /H^{+}[/tex].
So , option D is correct one.
Ozonolysis is used to form aldehyde and ketone from alkene not alkyne .So option A is incorrect .
The reagent PCC is used as an oxidant and is used to convert primary and secondary alcohol into aldehyde and ketone.
The [tex]BH_{3} /H_{2} O_{2} /OH^{-}[/tex] is used to convert alkene into alcohol which is known as hydroboration reaction.
The addition of a hydroxyl group to an alkyne causes tautomerization which subsequently forms a carbonyl Markovnikov addition of a hydroxyl group to an alkyne forms a ketone. So, [tex]H_{2}O /H^{+}[/tex] is used to convert alkyne into ketone.This reagent is needed to convert 1-hexyne to 2-hexanone.
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There are three major parts within each dna nucleotide. of these three, which is responsible for the storage of genetic information?
How would you separate a mixture of 4-tert-butylphenol and 2- chlorobenzoic acid? Explain the detailed steps including the choice of solvent and why this solvent would be use.
The a mixture of 4-tert-butylphenol and 2- chlorobenzoic acid is separate by the by using bicarbonate solvent.
When solution of bicarbonate is added in mixture of 4-tert-butylphenol and 2- chlorobenzoic acid then 2- chlorobenzoic acid form a carboxylate ion whereas 4-tert-butylphenol is underacted and filtered out.
Since, only 2- chlorobenzoic acid which is acid is convert into its conjugate base by solution of bicarbonate in mixture of 4-tert-butylphenol and 2- chlorobenzoic acid .
However, phenol is less acidic than carboxylic acid. Both phenol and carboxylic acid is soluble in organic solvent . At that point as the phenol isolates as an oil, one needs to cool the blend in an ice shower to encourage crystallization
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what is metallic conductivity ?
Explanation:
metallic conduction:the movement of electrons through a metal, with no changes in the metal and no movement of the metal atoms.
I hope this help uuhh............
What is chemical energy and how does it work ?
ty in advance
Answer:
Chemical energy is defined as. the energy which is stored in the bonds of chemical compounds (molecules and atoms).
Explanation:
Chemical energy may be released during a chemical reaction
Answer:
Chemical energy is the energy stored in the chemical bonds of Compound.
It's used during chemical Reactions.
How much water would need to be added to 750 ml of a 2.8 m hcl solution to make a 1.0 m solution?
1.35 Litres of water need to be added to 750 ml of a 2.8 m hcl solution to make a 1.0 m solution.
Use the following relation:
M1V1=M2V2
Where M is molarity, V is volume and 1 is initial and 2 is the final conditions. Solving for V(2)
M1=2.8 M,V1=750 mL;M2=1.0 M
(2.8 M)×(750 mL)=(1.0 M)×V2
V2=(2.8 M)×(750 mL)(1.0 M) = 2100 mL = 2.1 L
Therefore, Volume of water to be added =2.1 L−0.75 L=1.35 L
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Explain how the rate of diffusion of a gas is related to its molar mass.
carbon dioxide gas (co2) effuses 3.2 times faster than an unknown gas. determine the molar mass of the unknown gas. show your work or explain your answer, giving specific values used to determine the answer.
The molar mass of the other gas is 450.56 g.
Calculation:
Relation between rate of diffusion and molar mass of two gases is given by:
r₁/r₂ = (√m₂)/(√m₁)
Given,
r₁ = 3.2r₂
(r₁ is the diffusion rate of CO₂ and r₂ is the diffusion rate of the other gas)
We know
m₁ = molar mass of CO₂ = 44 g
To find,
m₂ = molar mass of the other gas =?
Put the values in the above equation,
r₁/r₂ = (√m₂)/(√m₁)
3.2r₂/r₂ = (√m₂)/(√44)
3.2 = (√m₂)/(√44)
Squaring both the sides,
10.24 = m₂/44
m₂ = 10.24 (44)
m₂ = 450.56 g
Hence, the molar mass of the other gas is 450.56 g.
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A solution is 0. 0480 m lif. What is the molarity of the solution if the density is 1. 10 g/ml?.
Molarity of the solution is 0.0527 M.
What is Molarity?The amount of a substance in a specific volume of solution is known as its molarity (M). The number of moles of a solute per liter of a solution is known as molarity. The molar concentration of a solution is another name for molarity.
Calculation of Molarity of the solutionAssume there is 1 kg of solvent present in the beginning.
Thus, the mole of solute is 0.0480 moles of LiF.
Molar mass of LiF = 25.939 grams/mole
0.0480 mol LiF x 25.939 g/1 mol LiF = 1.245 g LiF
Mass of the solution = 1001.245 g
The molarity of the solution can be determined as illustrated using the supplied density and moles of solute.
[LiF] = mol LiF/ volume of solution
[LiF] = 0.0480 mol/1001.245 g x 1ml/1.10g x 1L/1000mL
Hence, the molarity of LiF = 0.0527 M
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What type of response to chemical exposure is an immediate or rapid harmful reaction?.
An acute impact is a detrimental reaction to an exposure that occurs immediately or quickly.
A chronic impact is a long-term/permanent result of a single dosage or repeated lesser doses of a toxic drug.
What type of effects occur immediately following a chemical exposure?Acute (short-term) effects appear immediately or shortly after chemical exposure. They might be mild, such as nose or throat discomfort, or serious, such as eye damage or passing out from chemical fumes. All of these effects have one thing in common: they occur immediately.
What are the types of chemical exposure?The many methods in which a person might come into contact with dangerous substances are referred to as exposure routes. There are three primary routes of exposure: inhalation, ingestion, and skin contact.
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