1.553 atm is the pressure of the air, in atm , in the lungs when the gas expands to 195.0 mL at a body temperature of 37 ∘C , and the amount of gas remains constant.
V1=95 ml
P1=2.90 atm
T1=282 K
V2=195 ml
T2=310 K
by applying ideal gas equation
P1V1÷T1=P2V2÷T2
P2=P1×V1×T2÷V2×T1
P2= 85405 ÷54990
P2=1.553 atm
The definition of pressure is force/area. For instance, the weight of the snow divided by the area of the roof would represent the pressure from snow on a roof. Gases are often where pressure in chemistry originates from. Vacuum is the term for the lack of pressure. Since "nature abhors a vacuum," humans have believed that vacuums are both impossible and unnatural for hundreds of years. This isn't really the case.
The amount of pressure units is insane! The torr or mmHg is a common unit. Simply put, this refers to the height of a mercury column. The atmospheric pressure is about 760 torr, or mmHg. You may also see mmH2O, which employs the same notion, but in this instance the atmospheric pressure is around 10.3 mH2O since water is less dense than mercury.
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What is this answer helpp
The answer is the properties of noble gas. The following correct two answers are :-
A colorless and odorless gasNon-reactiveThe noble gases are colorless, odorless, tasteless, and nonflammable under popular conditions. They have been once categorized institution zero in the periodic table because it become believed they'd a valence of zero, meaning their atoms can't combine with the ones of other elements to form compounds.
The most considerable property of the noble gases, group 18 is their state of being inactive. They occur in low concentrations within the surroundings. They locate makes use of as inert atmospheres, neon signs and symptoms, and as coolants. The 3 heaviest noble gases react with fluorine to form fluorides.
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When preparing a solution in a cuvette, make sure to handle the cuvette by the ________ and avoid touching the __________ then, ___________ the cuvette before placing it in the spectrophotometer.
When preparing a solution in a cuvette ,make sure to handle the cuvette by the rim and avoid touching the transparent sides.then,blot all sides of the cuvette before placing it in the spectrometer.
Cuvette are a type of vessel which is necessary for spectral analysis of liquid samples.It is a small rectangular tube to hold the aqueous solution in it.this is used in spectrometric measurements to measure the absorbance of specific wavelength.
When preparing a solution, we have to handle the cuvette carefully to avoid breakage. We have to avoid contact with clear side of the cuvette with any hard surfaces. Avoid spillage of the solution on the outer side of the cuvette while filling the cuvette. Always hold the cuvette the opaque side with the two fingers and transparent sides are not being touched. Always clear them with the tissue paper before keeping cuvette inside the holder. Avoid applying excessive force while placing the cuvette in the holder.
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there are approximately how many separate chemical compounds, called cannabinoids, which have identified from cannabis resin?
More than 400 chemical components make up the complex plant known as cannabis, more than 60 of which are cannabinoid chemicals, some of which have antagonistic effects.
What are the cannabinoids derived from plant cannabinoids?Cannabinoid receptors are primarily found in the brain, and cannabinoids are a class of chemicals that interact with these receptors. Hallucinations may result from them, and an overdose may result in serious health issues. The Cannabis sativa plant's inflorescences are where one finds the naturally occurring cannabinoids.
There is no nitrogen in cannabinoids; instead, they include aromatic oxygenated hydrocarbons. The primary psychoactive effects of numerous pharmaceutical drugs are mostly attributed to the cannabinoid δ9-thc.
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A liquid mixture containing 40.0 wt % n-octane and the balance n-decane flows into a tank mounted on a balance. The mass in kg indicated by the scale is plotted against time. The data fall on a straight line that passes through the points (t=3 min, m=150 kg) and (t=10 min, m=250 kg)
Gases consist of weakly bonded atoms with no long-range periodicity; gases expand to fill any available space. Liquids have properties intermediate between.
M_{per}=52.86
W_{per}=47.14
What is the liquid mixture?
liquid, in physics, one of the three principal states of matter, intermediate between gas and crystalline solid. The most obvious physical properties of a liquid are its retention of volume and its conformation to the shape of its container. When a liquid substance is poured into a vessel, it takes the shape of the vessel, and, as long as the substance stays in the liquid state, it will remain inside the vessel. Furthermore, when a liquid is poured from one vessel to another, it retains its volume (as long as there is no vaporization or change in temperature)First mixture:
40 wt% methanol=60 wt% water 200 kg
m_{met1}=200 kg * 0.4=80 kg
m_{wat1}=200 kg * 0.6=120 kg
Second mixture:
70 wt% methanol=30 wt% water 150 kg
m_{met2}=150 kg * 0.7=105 kg
m_{wat2}=150 kg * 0.3=45 kg
Final mixture:
m_{metF}=80 kg + 105 kg=185 kg
m_{watF}=120 kg + 45 = 165 kg
M_{per}=\frac{185 kg}{185 kg +165 kg}*100=52.86
W_{per}=\frac{165 kg}{185 kg +165 kg}*100=47.14
if,the compositions are constant,the only variables are the mass of each mixture used in the final one, So there can be only one independent balance.
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Which of the compounds can in principle be isolated in optically active form at room temperature? select all valid choices.
Which is a secondary alcohol compound and is optically active is a 2-pentanol compound. It is said to be optically active because it has one asymmetric carbon atom, namely the C atom which binds 4 different groups, namely -CH3, -OH, -H, -CH2-CH2-CH3.
Carbohydrates are also optically active and some carbohydrates can rotate the plane of polarization of light.
Optically active compoundsCompounds that are optically active are compounds that can rotate the plane of polarization. A compound is optically active if it has asymmetric C or chiral C atoms. Asymmetric C atoms are C atoms that are bonded to four different elements or molecules.
If an optically active compound has asymmetric atoms or chiral C atoms in the compound, the compound is called an optically active compound. However, not all compounds that have chiral atoms are optical, because if the atom has a plane of symmetry or a plane that can be folded in half with the same side, it means that it is not an optical compound.
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the experimental ionization energy of na is 3.49 ev. calculate the effective nuclear charge seen by the 3s valence electron.
The effective nuclear charge seen by the 3s valence electron is 2.5.
The effective nuclear charge can be can be calculated by the following formula :
Zeff = Z - s
where,
Z = atomic number
s = screening constant
The electronic configuration of Na i given as :
₁₁Na = (1s²) (2s² 2p⁶) ( 3s¹ )
screening constant cab be calculated as :
s = ( 0.35 ( no. of electrons remaining in nth shell) + 0.85 ( electrons in (n-1) + 1 ( no. of e;ectron in ( n-2 ) )
s = ( 0.35 ( 0) + 0.85 ( 8) + 1 ( 2)
s = 6.8
Zeff = 11 - 6.8
Zeff = 2.5
Thus, The effective nuclear charge seen by the 3s valence electron is 2.5.
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Determine the number of bonding electrons and the number of nonbonding electrons in the structure of co2 c o 2.
Each oxygen atom has two lone pairs, so CO₂ has four non-bonding electron pairs. There are two C=O. Due to the bonds in its structure, CO₂ has four bond electron pairs.
Describe the structure of CO₂.Carbon dioxide is a compound consisting of a molecule in which one carbon atom is covalently bonded to two oxygen atoms. It is a gas at room temperature. Carbon dioxide in the air is permeable to visible light but absorbs infrared light, acting as a greenhouse gas.
Each O is surrounded by four dots and two bars or lines, representing the other four electrons in its double bond. Therefore, each O is surrounded by a total of 8 valence electrons, giving it an octet to stabilize it. Carbon dioxide is linear while sulfur dioxide is curved (V-shaped). In carbon dioxide, the two double bonds are pushed as far apart as possible, so the molecule becomes linear.
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In a hypotonic solution, water will move ____ the cell, causing the cell to ____.
In a hypotonic solution, water will move inside the cell, causing the cell to swell and burst.
Hypotonic solution refers to a solution that contains a lower amount of solute when compared to the solute concentration of other solutions, in a semipermeable membrane. Such kind of solutions basically have less solute concentration and water basically moves inside the cell membrane.
In hypotonic solutions, there is a net movement of the water from the solution into the body. Due to which if we place a cell in a hypotonic solution then that cell will start swelling up as the water is entering the cell and eventually it will burst out. And this process is called as cytolysis.
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Which class of acid will have an increased concentration in someone who is suffocating?.
ECF becomes hypertonic relative to ICF and draws water out of the cells class of acid will have an increased concentration in someone who is suffocating.
Concentration (generally uncountable, plural concentrations) The act, method or ability of concentrating; the system of becoming concentrated, or the nation of being concentrated. The path of attention to a specific object. The act, procedure or manufactured from reducing the quantity of a liquid, as by means of evaporation.
The attention of a substance is the quantity of solute present in a given amount of answer. Concentrations are generally expressed in phrases of molarity, defined as the quantity of moles of solute in 1 L of answer.
In chemistry, concentration refers to the amount of a substance in a defined space. every other definition is that attention is the ratio of solute in a way to either solvent or general answer. awareness is commonly expressed in terms of mass in line with unit extent.
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what attraction holds individual covalent molecules trogether as a solid and how that leads to ower melting and boiling points
Then attraction holds individual covalent molecules together as a solid are the force that hold the atom together if the each atom nucleus for the shared pair of electrons. the covalent compounds have very low melting point and boiling point.
The covalent bond form between the atoms by the sharing of electron. when there is no much difference in electronegativity of the atoms then the electrons are equally shared between two atoms. the mutual sharing of electrons formed covalent bond . the compound is called as covalent compound or molecules. the molecules held by very weak intermolecular forces and it is very easy to break them . so, they have low melting point and boiling point.
Thus, Then attraction holds individual covalent molecules together as a solid are the force that hold the atom together if the each atom nucleus for the shared pair of electrons .the covalent compounds have very low melting point and boiling point.
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calculate experimental error using the following data: the measured value equals 1.4 cm; the accepted value equals 1.2 cm.
The experimental error is 14.3%. A value's experimental error is the discrepancy between the value that was measured and the actual value.
What does experimental error entail and how was it calculated?A value's experimental error is the discrepancy between the value that was measured and the actual value. Or, to put it another way, it is the error or inaccuracies that prevent us from seeing a measurement that is 100 percent accurate.
Every measurement has some degree of experimental error, which occurs frequently. The experimental error is determined as follows in this instance.
The formula to determine percent error is percent error = [(approximate value - exact value) / exact value] 100.
Explanation:
Exp takes into account the observed value, in this case 1.4 cm, while theo takes into account the theoretical value, in this case 1.2 cm. As a result, the final number is: Error = (1.4 - 1.2)/1.4 = 0.1428571429 * 100 = 14.3%.
The correct response is therefore 14.3%. (corrected).
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a chemist makes of silver perchlorate working solution by adding distilled water to of a stock solution of silver perchlorate in water.
A chemist's working solution has a concentration of 6.718 mol/L in the supplied statement.
What is distilled water used for?Involve battery, automobile cooling equipment, or other devices whose mineral buildup might be harmful are sterilized using distilled water. It is perfect for use in skin care items, canning goods, or cleaning laboratory equipment because it doesn't contain any other minerals or pollutants.
Why can't we drink distilled water?Dehydration and health issues due to a lack of critical nutrients are brought on by drinking distilled water. Because of body absorbs dissolved salts from water into tissue, consuming distilled water is not a bad idea.
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Find this answer for me please
What is the coordinate for the last electron placed in the Br drawing
This last electron is called the differentiate electron because it distinguishes an atom from the one straight away preceding it in the periodic table.
What do you find the last electron configuration?Evaluate an electron configuration, and divide the periodic table into sections to act for the atomic orbitals, the regions where electrons are held. Groups one and two are the s-block, three through 12 represent the d-block, 13 to 18 are the p-block, and the two rows in the middle are the f-block. The electron configuration of an atom is written with the help of subshell labels. These labels contain the shell integer (given by the principal quantum number), the subshell name (given by the azimuthal quantum number), and the total number of electrons in the subshell in superscript.
So we can conclude that Electron configurations are the synopsis of where the electrons are around a nucleus. As we learned earlier, each neutral atom has a number of electrons
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Consider an enzymatic reaction in which the initial concentration of substrate is low. If the amount of enzyme is held constant, but the amount of substrate is increased, the rate of an enzyme catalyzed reaction will.
Answer:69.8
Explanation:
Which evidence from "marie curie and the discovery of radioactivity" best supports the idea that radium is helpful to humans?.
Cancer treatment acts as evidence from "Marie curie and the discovery of radioactivity" best supports the idea that radium is helpful to humans.
Because radiation became the most efficient and safest approach to cure cancer after Marie Curie's discovery because it inhibited the growth of cancer cells and was less invasive than surgery, radium was considered safer and more effective than surgery or the chemicals used to treat cancer at the time.
The discovery of polonium and radium, two naturally radioactive elements, attracted headlines, but Marie Curie's true discovery was that atoms were not little, solid balls and that there must be even smaller particles inside of them. This finding paved the way for all atomic and subatomic studies as well as atom splitting.
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A subunit of an organic compound that confers particular chemical and physical properties is termed.
A subunit of an organic compound that confers particular chemical and physical properties is termed, a functional group. Correct answer: letter C.
These groups are responsible for the reactivity of the molecule and the way it interacts with other molecules.
Importance of functional groups
Functional groups are important components of organic compounds. They are groups of atoms that are responsible for the unique physical and chemical properties of an organic compound. These properties, in turn, determine the behavior of a compound in a variety of reactions.
Functional groups are key to understanding why organic compounds behave the way they do. For example, an organic compound with a hydroxyl group (OH) is likely to react differently than one without it. As the hydroxyl group is responsible for the compound's behavior, it can be said that the hydroxyl group is a subunit of the organic compound that confers particular chemical and physical properties.
A subunit of an organic compound that confers particular chemical and physical properties is termed ________
A) A monomer.
B) An oligomer.
C) A functional group.
D) A synthetic unit.
E) An isomer.
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which property best accounts for the conductivity of metals? * (1) the relatively high first ionization energy
The property best accounts for the conductivity of metals is the free electrons in the valence level.
The metal conduct the electricity because of the free electrons on the valence energy levels. The conductivity is due to the free electrons. metal which have the highest conductivity is silver . the metal which has lower conductivity us aluminum. conductivity is defined as the measurement of the current that how it flow through a substance. the si unit of the conductivity is siemens per meter.
Thus, The property best accounts for the conductivity of metals is the free electrons in the valence level.
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Contractile vacuoles are organelles that maintain water balance by pumping excess water out of some single-celled pond organisms. In humans, the kidney is an organ chiefly involved in maintaining water balance. These facts best illustrate that.
These facts serve as the best examples of how the tissues, organs, and organ systems in all living things collaborate to maintain homeostasis because contractile vacuoles are organelles that regulate water balance
Homeostasis is the term used to describe the body's need to achieve and preserve a specific state of equilibrium. A physiologist by the name of Walter Cannon first used the term in 1926. The tendency of the body to keep internal conditions, like blood sugar and temperature, at essentially constant and stable levels is known as homeostasis.
Between cells and an entire organ, there is a biological organisational level called tissue. An assembly of comparable cells and their extracellular matrix from the same origin that work together to perform a particular function is referred to as a tissue.
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what is the concentration of a solution made by diluting 75 ml of 6.0 m hcl to a final volume of 750 ml?
The concentration of a solution made by diluting 75 ml of 6.0 m hcl to a final volume of 750 ml is 0.6 M.
Given that :
molarity of solution M1 = 6.0 M
volume of the solution V1 = 750 mL
molarity of solution after dilution M2 = ?
Volume of solution after dilution V2 = 750 mL
using the dilution law we get :
M1 V1 = M2 V2
M2 = M1 V1 / V2
M2 = ( 6 × 75 ) / 750
M2 = 0.6 M
Thus, The concentration of a solution made by diluting 75 ml of 6.0 m HCl to a final volume of 750 ml is 0.6 M.
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In mass-volume and volume-mass calculations all gases are considered to be at standard.
In mass-volume and volume-mass calculations all gases are considered to be at standard temperature.
what is standard temperature?
Standard sets of settings for experimental measurements are produced at standard temperatures and pressures (STP), allowing comparisons to be made between various sets of data. The most popular standards, though not universally acknowledged, are those of the National Institute of Standards and Technology (NIST) and the International Union of Pure and Applied Chemistry (IUPAC). For their common reference conditions, other organizations have developed a number of different alternative definitions.
In 1982, the IUPAC modified its definition of standard pressure and temperature for chemistry.
Before 1982, the standard temperature and pressure (STP) were 273.15 K (0 °C, 32 °F) and exactly 1 atm, respectively (101.325 kPa).
STP has been defined since 1982 as having a temperature of 273.15 K (0 °C,32F
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a student collects hydrogen gas over water in a graduated cylinder. if the student measures that the total pressure inside the graduated cylinder is 0.949 atm and the experiment was performed at 25oc, what is the pressure of hydrogen gas? enter your answer numerically in units of atm.
The pressure of hydrogen gas is 0.9177 atm. The result is obtained by using the Dalton's law of partial pressures.
What is Dalton's law of partial pressures?The Dalton's law of partial pressures states that the total pressure of a mixture of gases equals the amount of the partial pressures of the component gases. It can be expressed as
p = p₁ + p₂ + p₃ + ... + pₙ
Where
p = total pressure of a mixture of gasesp₁, p₂, p₃, ... = partial pressures of gasesCollected hydrogen gas over water in a graduated cylinder. The total pressure inside the graduated cylinder is 0.949 atm at the temperature of 25°C.
What is the pressure of hydrogen gas?
At the temperature of 25°C, the vapor pressure of water is 0.0313 atm.
If the total pressure of the mixture of gases is 0.949 atm, the pressure of hydrogen gas is
p = p vapor of water + p hydrogen
0.949 = 0.0313 + p hydrogen
p hydrogen = 0.949 - 0.0313
p hydrogen = 0.9177 atm
Hence, the pressure of hydrogen gas is 0.9177 atm.
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calculate the ph of a solution that is 0.075 m in trimethylamine, (ch3)3n , and 0.12 m in trimethylammonium chloride, ( (ch3)3nhcl ).
The buffer's pH value is 10.10.
Why is pH so crucial?The crucial parameter of pH represents the chemistry of a solution. The pH can affect how readily available nutrients are, how biological processes work, how bacteria behave, and how chemicals behave.
Trimethylamine is a weak base that creates a buffer when present with its conjugate base, trimethylammonium ion.
We use the H-H equation for weak bases to get the pH of the buffer:
pOH = pKb + log [Conjugate acid] / [Weak base]
pKb is -log Kb = 4.20
pOH = 4.20 + log [N(CH₃)₃] / [NH(CH₃)₃]
Replacing the concentrations of the problem:
pOH = 4.20 + log [0.075M] / [0.12M]
pOH = 3.9
As pH = 14 -pOH
The buffer's pH value is 10.10.
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a solution containing barium iodide is mixed with one containing magnesium sulfate to form a solution that is 0.0130 m in bai2 and 0.00330 m in mgso4 . does a precipitate form in the newly mixed solution? ksp(baso4)
Q(4.29 × [tex]10^{-5}[/tex] ) > Ksp ( 1.07 × [tex]10^{-10}[/tex]), so precipitate form in the newly mixed solution.
Ksp of Baso4 = 1.07 × [tex]10^{-10}[/tex]
Solution contains 0.0130m BaI2 and 0.00330m MgSO4
BaI2 → Ba2+ + 2I-
0.0130 2(0.0130)
MgSO4 → Mg 2+ + SO42-
0.00330 0.00330
Q = [Ba2+] [So42-] = 0.0000429 = 4.29 × [tex]10^{-5}[/tex]
Q(4.29 × [tex]10^{-5}[/tex] ) > Ksp ( 1.07 × [tex]10^{-10}[/tex])
Precipitation in an aqueous solution is the process of changing a dissolved substance from a super-saturated solution into an insoluble solid. Precipitate refers to the solid that forms. The chemical agent responsible for the formation of the solid during an inorganic chemical reaction is known as the precipitant.
Supernate or supernatant are other names for the clear liquid that remains above the precipitated or centrifuged solid phase.
When solid impurities separate from a solid phase, the concept of precipitation can also be applied to other chemical fields, such as organic chemistry and biochemistry, as well as the solid phases (such as metallurgy and alloys).
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What are three examples organisms?.
An organism is typically referred to as a single or unique living species that demonstrates all the characteristics of life. These might be a bacterium, plant, animal, bird, or even an insect.
What is an organism, simply put?A living human, plant, or animal that is capable of carrying out life's processes thanks to organs with unique roles but interdependent relationships organismic.
What types of organisms are examples?A living creature with a organized approach, is capable of responding to stimuli, can reproduce, develop, adapt, and preserve homeostasis is referred to as an organism. Therefore, every animal, plant, fungi, protist, microbe, or archaeon found on Earth would be considered a life.
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Compare the reaction for the expansion of methane with the reverse of the reaction that represents the standard enthalpy of formation. Which properties are the same for both reactions and which are different?.
SAME: -the condition of the molecules of methane.
DIFFERENT: Each element's total number of atoms
-the reaction's enthalpy change
-the atomic state of carbon
What does combustion's standard enthalpy change mean?Enthalpy change of combustion on a standard basis, H°c
When one mole of a compound is burned fully in oxygen under standard circumstances and with everything in its normal state, the enthalpy change that results is known as the compound's standard enthalpy change during burning.
What connection exists between standardized enthalpy and the enthalpy of formation?The standard enthalpy change of formation is defined as the sum of the standard enthalpies of formation of the products less the sum of the standard enthalpies of formation of the reactants in this equation.
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give the oxidation number of manganese in each of the following substances: mno4 1- mn2o3 kmno4 mno2 2- mnso4 mno2 mn
The oxidation states of manganese (Mn) in each of the following compounds: [tex]Mn0_{4} ^{-1}[/tex],[tex]Mn_{2} O_{3}[/tex],[tex]KMnO_{4}[/tex], [tex]MnO_{2} ^{-2}[/tex] , [tex]MnSO_{4}[/tex] and [tex]MnO_{2}[/tex] are
+7, +3, +7,+2, +2 and +4
[tex]Mn0_{4} ^{-1}[/tex]
Mn+4(-2)=-1
Mn -8=-1
Mn=-1+8
Mn= +7
[tex]Mn_{2} O_{3}[/tex]
2Mn+3(-2)=0
2Mn-6=0
2Mn=+6
Mn=+6/2
Mn=+3
[tex]KMnO_{4}[/tex]
(+1)+Mn+4(-2)=0
Mn -7=0
Mn=_+7
[tex]MnO_{2} ^{-2}[/tex]
Mn +2(-2)=-2
Mn-4=-2
Mn=-2+4
Mn=+2
[tex]MnSO_{4}[/tex]
Mn+(6)+4(-2)=0
Mn -2=0
Mn=+2
[tex]MnO_{2}[/tex]
Mn+2(-2)=0
Mn -4=0
Mn=+4
The oxidation state, often known as the oxidation number, in chemistry refers to the hypothetical charge that an atom would have if all of its links to other atoms were entirely ionic. It describes how much an atom in a chemical molecule has been oxidized. The oxidation state can theoretically be positive, negative, or zero.
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identify the allylic hydrogens in cyclohexene. select all that apply. image000228 1 2 3 4 5 6 7 8 9 10
The allylic hydrogens in the cyclohexene is four.
The allylic hydrogen atom is defined as the hydrogen atom which are connected to the allylic carbon atom in a compound. The allylic group is given as : -- H₂C = CHCH₂ -- called as allylic group. The allylic carbon atom is sp³ hybridize carbon atom. in cyclohexene the sp³ hybridized carbon atom is directly linked with sp² hybridized of alkene. Therefore cyclo hexene have four allylic hydrogen atom. The allylic carbon atom is the carbon atom which is directly double bonded with other carbon atom.
Thus, The allylic hydrogens in the cyclohexene is four.
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Answer the four questions to figure out the four digit code
Answer:
question 1 =c
question 2 =a
question 3 =d
question 4 =b
how many molecules of lactate can be produced from one molecular of glucose through glycolysis and lactate acid fermentation?
The number of molecules of lactate can be produced from one molecular of glucose through glycolysis and lactate acid fermentation is two molecules of lactate.
Fermentation is the way of breaking down glucose . In the fermentation the only way is glycolysis. six moles of pyruvate generated the two lactate molecules. fermentation is anaerobic process that allow glycolysis to break down glucose into the pyruvate. during fermentation of lactic acid by the anaerobic process two molecules of ATP are produced.
Thus, The number of molecules of lactate can be produced from one molecular of glucose through glycolysis and lactate acid fermentation is two molecules of lactate.
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