Considering the electronic configuration, the electronic configuration of the element with 8 more electrons is 3p⁶ 4s² 3d².
The placement of each element's electrons in its energy levels and sub-levels is known as its "electron configuration" (orbitals).
Cations and anions' electronic configurations
In other words, we adhere to the Aufbau Principle, Pauli-exclusion Principle, and Hund's Rule, which are the three key rules.
Electrons are allocated rationally per their energy level within the seven energy levels.
Sub-levels are separated into each level. There can be up to 4 sub-levels that each level is divided into. The names of these 4 sub-levels are s, p, d, and f.
There can only be a maximum of 2 electrons in sub-level s, 6 electrons in sub-level p, 10 electrons in sub-level d, and there can be a maximum of 2 electrons in sub-level f.
In this instance, the element's electrical arrangement ends with 3p². another element with eight more electrons.
First, you must add 4 electrons to the 3p orbital to complete it:
3p² plus 4 electrons equals 3p⁶
Two equal electrons must be added to the 4s orbital. This is true since 4s is less energetic than 3d.
4s²
Finally, you add the final 2 electrons to occupy the third orbital.3d²
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a radioactive nuclide of atomic number z emits an electron, then the daughter nuclide emits a gamma ray. what is the atomic number of the resulting nuclide after both processes?
The atomic number of the resulting nuclide after both processes is Z+1
Define atomic number.
The charge number of an atomic nucleus is the chemical element's atomic number, also known as nuclear charge number (symbol Z).
Three fundamental processes, including the emission of alpha particles, beta rays, and ayos range, are involved in radioactive decay.
An rise in the atomic number of a unit is implied by the emission of a beta ray, which signifies the transition of a neutral into a proton.
Z ----> Z +1
Since the two particles' masses are nearly equal, the atomic mass remains constant, hence an antineutrino must also be released to counteract the reaction.
When the daughter particle emits a gamma ray, it transitions from its execrated state to its base state without changing its atomic mass or number.
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45)the pressure of a gas is 2.30atm in a 1.80l container. what is the final pressure of the gas if the volume is decreased to 1.20l?
According to Boyle's Law the pressure of a gas is 2.30atm in a 1.80l container. 3.45 atm is the final pressure of the gas if the volume is decreased to 1.20
Boyle's Law demonstrates the relationship between a gas's pressure and volume. To demonstrate, we press the plunger down to alter the gas's volume. The volume is reduced as a result, and as a result of the gas molecules' reduced space, the pressure is rising:
V1 = 1.80 L, V1 = 2.30 atm, V2 = 1.20 L, and P2 =?
P1V1=P2V2
Rearrange now to compute P2:
P2=P1V1V2 P2=2.30atm×1.80L1.20L=3.45atm
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a 0.500 l solution contains 12.00 grams of calcium chloride, cacl2 how many moles of cacl2 are dissolved in the solution
In accordance with the stated assertion, 1 mol of Cacl₂will dissolve in the solution.
What in chemistry is a mole?Chemists employ the mole, a highly significant unit of measurement. Like a dozen eggs implies twelve eggs, having a mole of anything indicates we had 602,214,076,000,000,000,000,000 of that item. For extremely tiny objects as electrons, polymers, or other particles, chemists must quantify using moles. A mole is defined as the mass of a material with the same numbers of elementary particles that are atoms in exactly 12.000 g of 12C.
Briefing:You are aware that 1L of solution contains 2 moles of Cacl₂.
In 0.500 L of solution there are
0.500 L soln. * 2.0 mol of Cacl₂/1 L soln = 1 mol Cacl₂
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gases w and x react in a closed, rigid vessel to form gases y and z according to the equation above. the initial pressure of w(g) is 1.20 atm and that of x(g) is 1.60 atm. no y(g) or z(g) is initially present. the experiment is carried out at constant temperature. what is the partial pressure of z(g) when the partial pressure of w(g) has decreased to 1.0 atm?
Chemistry is the study of substances and bonds. There are two different sorts of elements: metals and bases.
0.20 atm is the right response.
What exactly is partial pressure?Each gas in a mixture of gases has a partial pressure, which is the notional pressure of that gas if it occupied the complete volume of the initial mixture at the same temperature on its own.
A mixture of ideal gases has a total pressure equal to the sum of its constituent gases' partial pressures.
Consider the subsequent response.
Z = W(g) + X(g) Y(g) (g)
Using an ICE chart, we can determine the partial pressure of Z at a moment we'll refer to as the equilibrium.
We label each row with the pressure or change in pressure for each of the three stages: Initial, Change, and Equilibrium.
Y(g) + Z = W(g) + X(g) (g)
I 1.20 1.60 0 0 C -x -x +x +x E 1.20 -x 1.60 -x x x
The partial pressure of W at equilibrium is 1 atm.
As a result, Z has a pressure of x = 0.20 atm.
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if 20 grams of kno3 is dissolved in 100 grams of water at 0 degrees celsius, what type of solution is made?
The type of solution made is unsaturated.
A solution is a homogeneous mixture of one or more solutes dissolved in a solvent. Note that the solvent is the substance present in the greatest amount. There are many different types of solutions. For example, solutes can be gases liquids, or solids.
A solution is formed when one substance dissolves or decomposes into another substance. A substance that dissolves into a solution is called a solute. A substance in which a solute dissolves is called a solvent. In a sugar, solution sugar is the solute and water is the solvent. A solution is prepared by dissolving a known mass of solute in a given amount of solvent.
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write net ionic equation for the following reaction: h2so4(aq)+mgco3(s)→h2o(l)+co2(g)+mgso4(aq).
The corresponding total ionic equation for the given reaction is:
H+(aq) + SO42+(aq) + MgCO3(s) ---> H2O(l) + CO2(g) + Mg2+(aq) + SO42+(aq)
Omitting the spectator ion which is the S042+ ion, we get the net ionic equation:
H+(aq) + MgCO3(s) ---> H2O(l) + CO2(g) + Mg2+(aq)
Net Ionic Equation:
A chemical reaction involving ionic species can be represented by a molecular, total, or net ionic equation. The molecular equation shows all the species in the undissociated/unionized forms. The total ionic species all the species in their dissociated/ionized ionic aqueous forms along with undissociated solid or liquid species. The net ionic equation, on the other hand, shows only those species which undergo a chemical change to form a non-aqueous species and omits any spectator ions that remain unchanged in the process.
Magnesium carbonate + Sulfuric acid → Magnesium sulfate + carbon dioxide + water.
The names of the products formed in this reaction are Magnesium sulphate, carbon dioxide and water.
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what is the molality of a lithium chloride solution produced by dissolving 14.40 g of licl (42.39 g/mol) in 115 g of water?
Molality of a lithium chloride solution produced by dissolving 14.40 g of licl (42.39 g/mol) in 115 g of water is 2.96.
Molality is calculated by the formula -
Molality = number of moles of solutes ÷ weight of solvent in kilograms
Number of moles of solute = mass ÷ molecular mass
Number of moles of solute = 14.40/42.39
Performing division
Number of moles of solute = 0.34
Keep the values in formula to find the molality
We know, 1000 gram is 1 kilogram
Mass of water = 0.115 kilograms
Molality = 0.34/ 0.115
Performing division
Molality = 2.96
Thus, molality is 2.96.
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a fire is which type of reaction? question 11 options: reduction single replacement double replacement reaction oxidation\
A fire is a single replacement reaction.
Fire converts fuel and oxygen chemically into carbon dioxide and water. Because it is an exothermic reaction, heat is produced. The reason for this is that the chemical connections between the oxygen molecule's molecules are often weak, but the new bonds formed are more stable and result in a net production of energy. During combustion events, carbon dioxide is not directly created. Instead, a large number of intermediate molecules are utilized along the path. Incomplete combustion can occasionally result in extraordinarily large concentrations of these intermediate molecules. For example, a flame that doesn't get enough oxygen may produce carbon monoxide instead of carbon dioxide.
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in the presence of sulfuric acid, this alcohol is dehydrated to form a pair of alkenes through an e1 mechanism. draw either of the major alkene products of this reaction.
in the presence of sulfuric acid, this alcohol is dehydrated to form a pair of alkenes through an e1 mechanism.hence we treat alcohol with H2SO, the main product is elimination. As we can see in the given reaction, the lone pair of oxygen electrons attached to the alcohol form a bond with the hydrogen of H2SO4 in step 1.
In the second step, H2O separates from the parent ring, resulting in a positive charge on the ring. In the third step, hydrogen is removed from the carbon next to the carbonium carbon, resulting in the formation of an alkene. An alkene is a hydrocarbon with a carbon-carbon double bond in organic chemistry. Alkene is frequently used as a synonym for olefin, which is any hydrocarbon with one or more double bonds. Monoalkenes are classified into two types: terminal and internal. The E1 mechanism, also known as unimolecular elimination, typically involves two steps: ionisation and deprotonation. As an intermediate during ionisation, a carbocation is formed. The carbocation loses a proton during deprotonation.
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Key computer issues addressed by the bureau of consumer protection (bcp) include all of the following except _____
All of the following are significant computer-related concerns that the Bureau of Consumer Protection (BCP) addresses, with the exception of how to increase the number of "cookies".
What is a consumer ?
Consumers are those who buy products for their own needs and utilise or consume them.
Product liability, privacy rights, unfair business practises, fraud, misrepresentation, and other consumer/company interactions are only a few of the many themes covered by consumer protection. Although a customer cannot resell the good, product, or service, he or she may use it to support himself or herself and engage in self-employment.
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Where are most volcanoes located? (Use information from the map.)
What is happening to the earth’s crust in these locations?
identify each of the following reactions as an isomerization, phosphorylation, or phosphate transfer.
solution of a compound in water conducts electricity, turns litmus red, and has a sour taste. what compound might be in the solution?
A chemical conducts electricity when dissolved in water, turns litmus red, and has a sour flavor. The substance in the solution can be acidic.
What is acid?Depending on how one chooses to view the characteristics of acidity and basicity, the terms "acid" and "base" have different definitions. According to Arrhenius, bases are chemicals that ionize to produce hydroxide ions while acids are compounds that ionize to produce hydrogen ions. According to the Lowry-Bronsted definition, a base is a proton acceptor, whereas an acid is a proton giver.
According to the Lewis definition, bases are described as molecules or ions that can coordinate with unshared electron pairs while also having unshared electron pairs that are accessible for sharing with acids. For a molecule to be acidic in the Lewis sense, it must be electron-deficient. The most inclusive definition of acid and base is this.
All Lowery Bronstead acids are Lewis acids, which also contain a variety of other reagents like boron trifluoride, aluminum chloride, etc.
Why do bases have a bitter taste and acids have a sour taste?Because amine groups are frequently found in naturally occurring bitter compounds, many bases are in reality bitter chemicals, whereas acidic compounds are supposed to taste sour due to the presence of hydrogen ions. Amine bases can easily break. Acids taste sour due to the pH level.
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which one of these sentences is appropriate for a formal lab report in chm113 lab?a. Three more trials were conducted and the data was recorded. b. First, record the seven concentrations of the red dye which...... c. The corvet was whipped with a soft tissue and then........ d. The error occurred because Tim spilled the solution. e. We got a good yield.
Three more trials were conducted and the data was recorded this is one of sentence appropriate for a formal lab report in chm113 lab.
The phrase "three further trials were undertaken and the data was recorded" is appropriate for a formal lab report in the CHM113 lab. Following the recording of these samples' absorbencies, a standard line curve with the concentration equation and an R2 value was produced using the data. To make it simpler to grasp huge amounts of data and the relationships between various series of data, series of numeric data are displayed in a graphical fashion using charts.
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an aqueous solution is known to contain ag , mg2 , and sr2 ions. which reagent should be used to selectively precipitate the ag ?
Only reagent (a) can be used to precipitate out the [tex]$\mathrm{Ag}^{+}$[/tex] ion selectively.
Reagents are substances or compounds that are added to a system in order to either start a chemical reaction or assess if one has already occurred. Although the terms "reagent" and "reactant" are sometimes used synonymously, "reactant" refers to a material that is consumed during a chemical reaction.
Among the given ions [tex]$\mathrm{Ag}^{+}, \mathrm{Mg}^{+2}$[/tex] and [tex]$\mathrm{Sr}^{+2}$[/tex].
The selective precipitative of [tex]$\mathrm{Ag}^{+}$[/tex] from the given mixture of ion solution can be carried out by using
a) 0.20 0.20M KBr.
[tex]$$\mathrm{Ag}^{+}(aq)+{Br}(aq) \rightleftharpoons \mathrm{Ag}^{-} {Br}(s)[/tex]
The resultant will be a yellow precipitate.
While the rest of the options [tex]$\mathrm{Mg}^{+2}$[/tex] or [tex]$\mathrm{Sr}^{+2}$[/tex] will be precipitated out.
[tex]$$\left.\mathrm{Mg}_{(aq)}^{2+}+2 \mathrm{OH}^{-}(\mathrm{aq})=\mathrm{Mg}^{+2}(\mathrm{OH)}\right_2{ }{(S)}$$[/tex]
On [tex]$\mathrm{K}_2 \mathrm{SO}_4$[/tex] and [tex]$\mathrm{K}_3 \mathrm{PO}_4, \mathrm{Sr}^{+2}$[/tex] will be precipitate out here only.
[tex]$$\begin{aligned}& \mathrm{Sr}^{+2}+\mathrm{SO}_4^{2-} \rightleftharpoons \mathrm{Sr}^2 \mathrm{SO}_4(s) \\& 3 \mathrm{Mg}^{+^2}+\mathrm{pO}_4^{3-} \rightleftharpoons \mathrm{Mg}_3 \mathrm{PO}_4(s)\end{aligned}$$[/tex]
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The complete question may be like this:
An aqueous solution is known to contain Ag+, Mg2+, and Sr2+ ions. Which reagent should be used to selectively precipitate the Ag+ ion?
a. 0.20M KBr b. 0.20M KOH c. 0.20M K2SO4 d. 0.20M K3PO4
1/16if the oxygen isotope 20o has a half-life of 15 seconds, what fraction of a sample of pure 20o remains after 1.0 minute?
If the half-life of the oxygen isotope [tex]O^{20}[/tex] is 15 seconds, then after one minute, 1/16 of a sample of pure [tex]O^{20}[/tex] is still present.
The period of time it takes for one half of a radioactive isotope to decay is known as the half-life. A particular radioactive isotope's half-life is constant; it is unaffected by environmental factors and is unrelated to the starting concentration of that isotope. A half-life is the amount of time it takes for something to go from 100% to 50%. The word is most frequently used in relation to radioactive decay, which happens when unstable atomic particles lose energy. It is known that 29 elements can go through this process.
Assumed:
The [tex]O^{20}[/tex] half-life is 15 seconds.
According to this half-life, the reactant 8s will be reduced by half at this point.
Currently, 60 seconds equal one minute.
Then we will have 4 half-lives in 60 seconds.
Next, [tex]O^{20}[/tex] will be [tex]\frac{1}{2}^4[/tex]
[tex]\frac{1}{2}^4 =\frac{1}{16}[/tex]
As a result, [tex]\frac{1}{16}[/tex] a sample of pure [tex]O^{20}[/tex] is still present after one minute.
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According to wobble rules, what codons should be recognized by the anticodon 5′-ICC-3′? What amino acid residue do they correspond to?
Sequences, identified by this tRNA will be 5'-GGA-3' or 5'-GGU-3' or 5'-GGC-3'
In RNA molecules, a wobble base pair is a pairing of two nucleotides that deviates from the Watson-Crick base pair rules. Guanine-uracil (G-U), hypoxanthine-uracil (I-U), hypoxanthine-adenine (I-A), and hypoxanthine-cytosine are the four major wobble base pairs (I-C)
So I can pair with A, U, and C on an anticodon.
Pairings C and G can take place.
A pairs with U while G pairs with C, U and U pairs with A, G.
The specified order is 5′-ICC-3′. As a result, we can state that the tRNA's sequence is 3'-CCI-5'.
I serves as the foundation for this wobbling and can be paired with A, U, or C.
As a result, this tRNA will identify the mRNA with the sequence 5'-GGA-3', 5'-GGU-3', or 5'-GGC-3'.
All these Codons corresponds to the amino acid “Glycine”
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an aqueous solution of ammonia, nh3, has a concentration of 6.70 mol/l and has a density of 0.950 g/ml. what are the mass percent and molality of nh3 in this solution?
The mass percent of [tex]NH_{3}[/tex] is 12.01% and The molarity of [tex]NH_{3}[/tex] is 8.015m
Aqueous solutions are solutions in which the solvent is water. It is most often represented by a chemical formula by adding (aq) to the appropriate chemical formula. For example, an aqueous solution of table salt or sodium chloride (NaCl) is represented as Na+(aq) + Cl-(aq)
Calculation :
Let the volume of solution be 1 L
So, number of mol of \ in 1 L solution will be = 6.70 mol
Mass NH3 = mol x molar mass
= 6.70 mol x 17.031 g/mol
= 114.1 g
Mass of solution = density x volume
= 0.950 g/mL x 1000 mL
= 950 g
Mass percent of NH3 = ( mass NH3 / mass solution ) x 100
putting values :
= (114.1 g / 950 g ) x 100
= 12.01 %
Mass of solvent = mass of solution - mass NH3
= 950 g - 114.1 g
= 835.9 g
1 kg = 1000 g
mass of solvent in kg = 835.9 / 1000 kg
= 0.8359 kg
Molality = mol solute / mass solvent in kg
= 6.70 mol / 0.8359 kg
= 8.015 m
So, mass percent NH3 = 12.01 %
molality of NH3 = 8.015 m
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In horses, having chestnut hair (E) is dominant o having black hair (e). A homozygous dominant p is crossed with a homozygous recessive parent.the Punnett square shows the possible genotypes o offspring. Each offspring will express a phenotype of _________ hair.
Answer:
chestnut
Explanation:
In horses, having chestnut hair (E) is dominant over having black hair (e). If a homozygous dominant parent (EE) is crossed with a homozygous recessive parent (ee), the Punnett square will show that all of the offspring will have the genotype Ee (heterozygous).
Since the chestnut hair trait is dominant, all of the offspring will express the phenotype of chestnut hair, regardless of their genotype.
Therefore, each offspring will have chestnut hair.
I hope this helps! Let me know if you have any other questions.
Predict the ground‑state electron configuration of each ion. Use the abbreviated noble gas notation.
Cr2+ : Cu2+ : Co3+ :
The electron configuration of an atom or ion is the arrangement of electrons in the orbitals of the atom or ion. It is represented by a list of occupied atomic orbitals in order of increasing energy, with the number of electrons in each orbital given in superscript. The electron configuration of an atom or ion can be used to predict its chemical behavior and reactivity. It is determined by the number of protons in the nucleus, which determines the number of electrons in the atom or ion, and the arrangement of these electrons in the atomic orbitals. The electron configuration of an atom or ion is written using the Periodic Table and the principles of quantum mechanics.
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once the substance is in the gas phase what would happen if you continue to increase the temperature
It is clear that as temperature rises, the kinetic energy of the particles in a perfect atomic gas also rises. This also holds true for actual gases and other ideal gases with more intricate molecular structures.
Heat energy is arbitrarily measured as "temperature" (enthalpy). When a system encounters a higher energy source, the temperature of that system rises as a result.
The result is the transmission of energy as heat, regardless of the source. Heat causes molecules to move more quickly (absorb energy), and some or all of the heat energy is transformed into kinetic energy.
Therefore, the result of heating a gas is a quicker rate of molecular motion. Because of the molecules' more frantic, frenetic mobility and subsequent collisions with the container walls, there is a rise in pressure inside the container.
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As a distant star moves away from Earth, the light given off by the star has a measurably lower frequency. What happens to the wavelength and energy of the photons of light when the frequency becomes lower?
a. The wavelength becomes longer, and the energy decreases.
b. The wavelength becomes shorter, and the energy decreases.
c. The wavelength becomes longer, and the energy increases.
d. The wavelength becomes shorter, and the energy increases.
As a distant star moves away from earth, a. The wavelength becomes longer, and the energy decreases.
What is wave length?The distance between two successive crests or troughs of a wave is known as its wavelength. The direction of the wave is used to measure it.
The distance a wave travels between its crests or troughs is known as its wavelength (which may be an electromagnetic wave, a sound wave, or any other wave). The peak of the wave is called the crest, while the trough is its base. Because a wavelength represents a distance or length, it is expressed in length units like meters, centimeters, millimeters, nanometers, etc.
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the decay rate of an isotope is initially r 0, but after one half-life has gone by, the rate is r 0/2. at the end of the next half-life, what will the decay rate be?
The decay rate of an isotope is initially r 0, but after one half-life has gone by, the rate is r 0/2. at the end of the next half-life, The decay rate will be r0/4.
The decay rate of an isotope is a measure of the rate at which the isotope decays or breaks down into another element. The decay rate is typically expressed as the fraction of the isotope that decays per unit of time.
The half-life of an isotope is the time it takes for half of the isotope to decay. After one half-life has passed, the decay rate of the isotope is reduced to half of its initial value (r0/2). At the end of the next half-life, the decay rate will be further reduced to half of its current value, which is r0/2/2 = r0/4.
Therefore, at the end of the next half-life, the decay rate of the isotope will be r0/4.
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Lithium has two isotopes with mass number 6 and 7. If the relative atomic mass of
lithium is 6.94, determine the percentage abundance of each isotope.
Answer: 86.14%, 100.86%
Explanation:
The relative atomic mass of an element is the average mass of the isotopes of the element, taking into account the abundance of each isotope. To determine the percentage abundance of each isotope, we can use the following formula:
Percentage abundance = (isotope mass / relative atomic mass) x 100
For the isotope with mass number 6, the percentage abundance would be:
(6 / 6.94) x 100 = 86.14%
For the isotope with mass number 7, the percentage abundance would be:
(7 / 6.94) x 100 = 100.86%
So the isotope with mass number 6 has an 86.14% abundance, and the isotope with mass number 7 has a 100.86% abundance. The sum of these two percentages is slightly greater than 100 because the relative atomic mass is an average and does not take into account the abundance of each isotope.
cis-1,2-Dimethylcyclohexane is achiral, not because there is a plane of symmetry, but because it consists of two enantiomeric conformations which interconvert rapidly via ring flipping at normal temperatures.
Consequently, choice is the right response (D) The symmetry plane of cis-1,2-dimethylcyclohexane exists. Additional Information: It should be emphasized that an achiral molecule is one that possesses a plane of symmetry. It is possible to superimpose an achiral molecule on its mirror counterpart.
Why is achiral cis-1 2-dimethylcyclohexane?
Instead of having a plane of symmetry, cis-1,2-dimethylcyclohexane is achiral because it has two enantiomeric conformations that quickly interconvert via ring flipping at room temperature.
There is an enantiomer of cis-1 2-dimethylcyclohexane, right?
Two different chair conformers of cis-1,2-dimethylcyclohexane are possible. Two conformational enantiomers are present here. Rapid interconversion prevents them from being resolved.
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heliox is a mixture of helium and oxygen gas used to help patients with breathing difficulties. it is also used for scuba diving. the total pressure in a tank of heliox is 208 atm. if the mole fraction of o2 is 0.220, what is the partial pressure of he in the tank?
The answer is 162.24 atm for partial pressure of helium gas.
Reason: Heloix's atmospheric pressure is p0=atm.
Oxygen mole fraction =Xo=0.22
Helium's mole fraction is xHe=1-Xo=1-0.22=0.78.
Dalton's law of partial pressure states that
Heloix's oxygen partial pressure is calculated as follows: p0=p0Xo=208atm0.22=45.76atm
Heloise's partial pressure of helium is pHe=p0XHe=208atm0.78=162.24atm.
Helium gas has a partial pressure of 162.24 atm.
What happens when oxygen and helium are combined?The density of heliox, a mixture of helium and oxygen, is lower than that of air. In especially in conditions marked by increased airways resistance, inhaling heliox results in a decrease in resistance to flow within the airways and, as a result, a reduction in the work of breathing (WOB).
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in 25.0 g of a 7.50% by mass solution of caso4: a) how many grams of solute are present? b) how many grams of solvent are present?
a) Solute weight in grams: (25*7.5)/100 = 1.875 gm.
b) Because the weight of a solution is equal to the sum of the weights of the solute and solvent,
Solution weight is 100 grams.
Solvent weight in grams: 100 - 1.875 = 98.125 gm.
Given that water has a density of 1 g/ml, the formula to determine how much solute to add to a solution in weight percent is as follows: grams of solute = (wt% solution) x (ml of water) (100 - wt% solution). The ratio of a solute—a material that dissolves—to a solvent—a substance that does not dissolve—determines the concentration of a solution in chemistry. C = m/V, where C is the concentration, m is the mass of the solute dissolved, and V is the overall volume of the solution, is the accepted formula.
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a certain liquid has a normal freezing point of and a freezing point depression constant . calculate the freezing point of a solution made of of iron(iii) chloride () dissolved in
The differential between freezes point of the pure reagent and or the melting point of the solution is referred to as the depression in the freezing point.
How do melting and freezing points differ?
Definition. The temperature at which a liquid turns into a solid under normal air pressure is known as the freezing point. A melting point, on the other hand, is the temperature at which a solid turns into a liquid at ordinary atmospheric pressure.
Is the freezing point precisely 32 degrees?
Water frozen at 32 degrees Fahrenheit, 0 degrees Celsius, and 273.15 Kelvin, as we have all known. But this isn't always the case. After discovering water vapour at -40 degrees Centigrade inside clouds, scientists have even chilled water as in lab to -42 degrees C.
Briefing:
0.8 - (freezing point of solution)=4×7.82×81.1×1000/162.2×850
= 0.8-18.4
freezing point of solution = -17.6°C
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nitrogen in a container (molar mass is 28 g/mol) has a pressure of 2.5 atm, a volume of 0.2 m3, and a temperature of 30oc. what is the mass of the nitrogen? group of answer choices
The mass of the nitrogen is 563.11 g.
Let the number of moles be n
T = 30 C = 303 K
V = 0.2 m3
P = 2.5 atm = 253312 Pa
R = 8.314 J/mol-K
n = PV/RT = (253312*0.2}{303*8.314} = 20.11 moles
Mass = moles * molar mass= 20.11 * 28 = 563.11 g
Moles = Sample Mass / Molar Mass By dividing the number of moles by the Avogadro constant, you may get the total number of atoms or molecules in a sample. Atoms or Molecules=Number of Moles / 6.022*10 23 is the formula. The mass in grams of one mole of a nitrogen is its molar mass. The molar mass of a nitrogen may be found by adding the molar masses of its constituent atoms.
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what percent composition of phosphorus in zn3(po4)2? this means to find the percent composition of each element in the compound (zn, p, and o)
In zinc phosphate, zinc makes up 50.84% of the composition. In zinc phosphate, oxygen makes up 32.12% of the total composition.
How can I calculate the percent composition percentage?Composition as a percent Find the compound's molar mass in grams per mole for each element. Calculate the compound's overall molecular weight. Subtract the total molecular mass from the component's molar mass. The number you have now will be between 0 and 1. To obtain the composition in percent, multiply it by 100%.
How is the oxygen percentage determined?Divide the change in the burette reading by the initial volume of air in the burette and multiply by 100 to get the percentage of oxygen in air expressed as a percentage of volume.
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