Take the carbon dioxide (CO2) molecule as an illustration. The linear CO2 molecule has polar carbon-oxygen double bonds (electronegativities: C = 2.5, O = 3.5).
Is CO2 electronegativity polar?
The polar bonds in CO2 and H2O are both two. The CO2 molecule is non-polar because the dipoles in the linear form of the molecule cancel each other out.
Is the bond in CO2 polar or nonpolar?
While sulphur dioxide is a bent molecule, carbon dioxide is a linear molecule. In spite of the fact that both molecules have polar bonds (see bond dipoles on the Lewis structures below), carbon dioxide is nonpolar whereas sulphur dioxide is polar.
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What is the osmotic pressure of a 1.4 M aqueous solution of glycerin in water at 47°c? Report your answer in atm and round to the second decimal place. Glycerin=C3H5(OH)3
The osmotic pressure of the 1.4 M aqueous solution of glycerin in the water at 47 °C is 36.73 atm.
The molarity of the solution = 1.4 M
The temperature of the solution = 47 °C = 320 K
The osmotic pressure is expressed as :
Osmotic pressure = M R T
where,
M = molarity = 1.4 M
R = constant = 0.082 atm L / mol K
T = temperature = 320 K
By solving the values , we get :
Osmotic pressure = M R T
Osmotic pressure = 1.4 × 0.082 × 320
Osmotic pressure = 36.73 atm
Thus, the osmotic pressure is 36.73 atm.
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Which one of the following molecules is nonpolar?
A) NH3 B) OF2 C) CH3Cl D) H2O E) BeCl2
E. BeCl2 is non-polar molecule. Since Beryllium (1.57) and chlorine (3.16) have different electronegativities, and their difference of 1.59 places them in the polar covalent range.
How polar is the CH3Cl molecule?The electronegativities of these two or more atoms differ just little when it comes to the link between carbon and hydrogen. The C-H bond is considered as nonpolar as a consequence. However, CH3Cl is a polar molecule since this chlorine atom has partial negative charges and a net dipole moment.
What distinguishes polar from nonpolar matter?The electron density is distributed evenly among polar molecules. A nonpolar molecule is generated when the density of electrons is not evenly distributed. The organization of polar compounds is asymmetric. They share symmetrical polar bonds.
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if an insufficient amount of acid is added in step 9
To calculate the percentage of hydrogen peroxide in the used solution, the amount of hydrogen peroxide must be known.
Since the amount of water is a dependent variable and must remain constant over the course of each trial, it must be known.
Given equation: [tex]H2O2 - > O2 + 2H+ + 2e-[/tex]
[tex]MnO4- + 8H+ + 5e - > Mn2+ + 4H2O[/tex]
In our solution, hydrogen peroxide made up 3.075% on average. To calculate the ratio, we used the ideas of half-redox reactions and our understanding of stoichiometry. This is very similar to the real figure, 3%, that is listed on the bottle. The inaccurate % value is caused by the following sources of mistake. The ratio would become more equal. The volume would be reduced. Because of the altered mole ratio's increased oxygen requirement, it would be too high.
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complete question: If an insufficient amount of acid is added in step 9, some of the MnO4- ions will be reduced to MnO2 instead of to Mn2+. a. How would this change the mole ratio for the titration reaction? b. How would this affect the volume of KMnO4 solution needed to reach the endpoint? c. lf reduction to MnO2 were occurring but not being reflected in the calculations, would the calculated percent hydrogen peroxide be too high or too low as a result of this error?
explain why biodiesel fuels have a different effect on atmospheric carbon levels than fossil fuels do.
Biodiesel has decreased emission of atmospheric carbon than fossil fuels due to the presence of oxygen molecules.
Biofuels have lower carbon emissions than burning fossil fuels because oxygen molecules are present in them and help in complete combustion. Carbon in biodiesel is recently present in the atmosphere while carbon in fossil fuels are formed by action of many geological forces on deep layers of earth over many thousands of years so the carbon is preserved and lack the presence of oxygen.
Fossil Fuels are Hydrocarbons which release Carbon Dioxide on burning. The Carbon recently present in atmosphere is extracted in Biofuels so this cause no net Change in Carbon levels in atmosphere.
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For each of the following precipitation reactants, calculate how many grams of the first reactant are necessary to completely react with 18. 0 gram of the second reactant.
K2SO4(aq)+Sr(NO3)2(aq)--->>SrSO4(s)+2KNO3(aq)
29.2 grams of Potassium Sulfate are necessary to completely react with 18.0 grams of Sr(NO3)2.
The balanced chemical equation for the reaction between K2SO4 and Sr(NO3)2 is:
K2SO4 (aq) + Sr(NO3)2 (aq) -> SrSO4 (s) + 2KNO3 (aq)
To calculate the amount of K2SO4 needed to react with 18.0 grams of Sr(NO3)2, we need to use stoichiometry. From the balanced equation, we can see that 1 mole of Sr(NO3)2 reacts with 2 moles of K2SO4. To convert 18.0 grams of Sr(NO3)2 to moles, we use the molar mass:
(18.0 g Sr(NO3)2) / (214.0 g/mol Sr(NO3)2) = 0.084 mol Sr(NO3)2
Since 1 mole of Sr(NO3)2 reacts with 2 moles of K2SO4, then 0.084 moles of Sr(NO3)2 will react with 0.084 × 2 = 0.168 moles of K2SO4. To convert moles of K2SO4 to grams, we use the molar mass:
(0.168 mol K2SO4) × (174.3 g/mol K2SO4) = 29.2 g K2SO4
Therefore, 29.2 grams of K2SO4 are necessary to completely react with 18.0 grams of Sr(NO3)2.
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Need help on question 53
What is the empirical formula for a compound that contains 82.66% C and 17.34% H.
The empirical formula for a compound that contains 82.66% C and 17.34% H is [tex]C_{2}H_{5}[/tex].
The empirical formula of a compound represents the simplest whole-number ratio of elements in the compound. To find the empirical formula from the percentage composition, we need to convert the percentages to masses and then to moles.
First, we can calculate the mass of each element in a 100 gram sample of the compound:
Mass of C = 82.66 g C / 100 g sample = 0.8266 g C
Mass of H = 17.34 g H / 100 g sample = 0.1734 g H
Next, we convert the masses to moles:
Moles of C = 0.8266 g / 12.01 g/mol = 0.0686 mol
Moles of H = 0.1734 g / 1.01 g/mol = 0.1717 mol
Finally, we divide each moles value by the smallest moles value to get the simplest whole number ratio of the elements:
Moles of C / 0.0686 mol = 1
Moles of H / 0.0686 mol = 2.5
Therefore, The empirical formula for a compound that contains 82.66% C and 17.34% H is [tex]C_{2}H_{5}[/tex].
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what kind of intermolecular forces act between a bromide anion and a methanol ch3oh molecule?
The intermolecular forces that act between a bromide anion (Br-) and a methanol molecule are hydrogen bonding and dipole-dipole interactions
Bromide anion (Br-) and methanol (CH3OH) are held together by intermolecular forces. The polar hydroxyl (OH) group in methanol creates hydrogen bonds with the negatively charged bromide anion. These hydrogen bonds are strong, directional, and specific. The methanol molecule has an overall dipole moment, creating dipole-dipole interactions with the bromide anion. Dipole-dipole interactions are the result of attractive forces between positive and negative ends of polar molecules. The polar nature of methanol and the negative charge of the bromide anion result in a significant dipole-dipole interaction between them .London dispersion forces may also play a role in the interaction between Br- and CH3OH, as both species are non-polar. These intermolecular forces result in a stable, cohesive molecular assembly between the bromide anion and methanol. The strength of these intermolecular forces will influence the physical properties of a solution containing Br- and CH3OH.
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stereoisomers that result from the hindered rotation of a single bond are called __________.
Stereoisomers that result from the hindered rotation of a single bond are called "configurational isomers" or "cis-trans isomers".
These isomers share the same chemical structure and bond connectivity, but their spatial arrangements are different. When a molecule has a single bond that is surrounded by bulky groups, preventing rotation around that bond, cis-trans isomers can form. The two isomers will differ in terms of their melting and boiling temperatures as well as their biological activity.
The isomers of amides, such as N-phenylacetamide, and alkenes, such as cis-2-butene and trans-2-butene, are examples of cis-trans isomers. As some enzymes and other biological molecules show specificity for one isomer over another, these isomers can also be significant in biology. Therefore, it is crucial for students of organic and biochemistry to understand the characteristics of cis-trans isomers.
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relative abundance is the unit along the y-axis in a mass spectrum. what are the units on the x-axis?
The unit on the x-axis is m/z (mass/charge ratio).
The mass-to-charge ratio (m/z) is a physical quantity used in mass spectrometry to describe the size and composition of ions. In a mass spectrometer, ions are separated based on their m/z value, which is calculated as the ratio of the ion's mass to its charge.
The m/z value is a unique identifier for each ion, allowing scientists to identify and quantify individual components within a sample.
Mass spectrometry is an important tool in many fields, including chemistry, biology, and environmental science, where it is used to determine the molecular weight and chemical composition of substances.
Understanding the mass-to-charge ratio is critical to effectively interpret and use data obtained from a mass spectrometer.
Therefore, The unit on the x-axis is m/z (mass/charge ratio).
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316 Ether groups are formed when alcohols are treated with acid. Consider the following two questions that focus on acid-catalyzed ether formation using alcohol functional groups. lSee Periodic Table See Hint Part 1 (1 point) How many unique ether products will be formed when the following reaction is performed? dilute HCI heat Choose one: o A. 1 B. 3 o C. 4 D. 2
There are two primary methods for producing ethers: dehydration of alcohols or the Williamson Synthesis.
Williamson's synthesis, which involves reacting an alkoxide with a haloalkane, can be used to make acyclic ethers.
Alcohols dehydrate in the presence of protic acids (sulphuric acid) to produce alkenes and ethers under different conditions.
Dehydration of ethanol at 443 K, for example, yields ethene in the presence of sulphuric acid, whereas it yields ethoxyethane at 413 K.
The most common ether reaction is the cleavage of the C-O bond by strong acids. The ether oxygen is protonated during acidic cleavage to form good leaving groups that can be eliminated as part of an SN2, SN1, or E1 reaction mechanism.
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What is Iron II Oxide?
Iron II oxide, also known as ferrous oxide, is a chemical compound with the formula FeO. It is a black or brown solid that occurs naturally as the mineral wüstite. FeO is an intermediate in the extraction of iron from iron ore and is also used as a raw material in various industrial processes.
What are the uses of Iron II oxide?
Iron II oxide (FeO) has various industrial uses. It is used in the production of iron and steel, as a raw material in the production of pig iron, in the manufacture of ferromagnetic alloys, and as a catalyst in the synthesis of chemicals.
FeO is also used as a refractory material in high-temperature industrial processes, as well as in the production of ceramics and glass. It is also used as a pigment in the ceramics and glass industries, as well as in the production of magnetic inks for audio and video tapes.
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which one of the following changes would cause the volume of a gas to double, assuming moles were held constant? a) doubling pressure while keeping temperature constant. b) doubling absolute temperature while keeping pressure constant. c) doubling absolute temperature while cutting the pressure in half. d) doubling the absolute temperature while doubling the pressure.
Doubling the absolute temperature while doubling the pressure changes would cause the volume of a gas to double, assuming moles were held constant.
What is volume?
Volume is a measurement of a three-dimensional object's capacity to contain something. It is usually measured in cubic units such as cubic centimeters (cm3), cubic meters (m3), cubic feet (ft3), and liters (L). It is an important concept in many fields, including physics, chemistry, and mathematics. In physics, volume is often used to measure the amount of physical space occupied by an object or substance. In chemistry, it is used to measure the amount of a specific substance in a given space. In mathematics, volume is often used to calculate the area of a three-dimensional shape. Volume is also used in everyday life, such as to measure the capacity of a container, the size of a room, or the amount of a substance. It is a fundamental concept in many areas of science, engineering, and technology.
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During the process of mountain building,
Answer: the villain arc was real
Explanation: got it right 100% on my test
Answer: material from the Earth's interior is often returned to the surface for study island.
What is the formula and use of Sulphuric acid?
Two hydrogen atoms, one sulfer atom, and four oxygen atoms make up sulfuric acid, also known as H2SO4. Strong, water-soluble, highly polar sulfuric acid is a great solvent. It is used in the creation of detergents and fertilisers, among other things.
Which two purposes does sulfuric acid serve?
Producing fertilisers like superphosphate of lime and ammonium sulphate is the main usage of sulfuric acid. It is frequently utilised in the production of chemicals, such as synthetic detergents, explosives, hydrochloric acid, nitric acid, sulphate salts, dyes & pigments, and pharmaceuticals.
What are the four industrial uses of sulfuric acid?
It is extensively utilised in the production of chemicals, such as nitric acid, sulphate, and hydrochloric acid.
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What is Nitrogen dioxide?
Nitrogen dioxide (NO2) is a toxic gas composed of nitrogen and oxygen atoms.
What is Nitrogen dioxide (NO2)?
Nitrogen dioxide (NO2) is a toxic gas composed of nitrogen and oxygen atoms. It is a reddish-brown gas with a strong, pungent odor. It is produced by combustion processes and is commonly found in air pollution, especially near heavily populated cities and industrial areas. NO2 has negative impacts on human health and the environment and is a significant contributor to acid rain and smog.
Nitrogen dioxide has limited practical uses, mostly in the production of nitric acid and as a feedstock for the manufacture of fertilizers. However, its major use is as a pollutant, resulting from transportation and industrial activities.
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What changes the identity of an atom?
The thing which changes the identity of an atom is the by adding or removing the protons from the nucleus will changes the charge of the nucleus and it changes that the atom's atomic number.
The number of the protons in an atom is equals to the atomic number of the atom. So, by adding and removing the protons from the nucleus of atom will changes the charge of the nucleus and it changes that the atom's atomic number. The example is as : if we added a proton to the nucleus of the hydrogen atom and then it turns the helium atom.
Thus by changing the number of the protons in an atom , the atoms identity will changes.
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The method used in this experiment is difficult to apply for determining the formula weight of unknown salts in aqueous solutions. Even when accurate freezing point depressions are measured, the results are not always conclusive because there can be an undetermined parameter. Considering the information in the Introduction section, what is the best explanation for this difficulty?
Considering the information in the Introduction section, the best explanation for this difficulty is the value of the van't Hoff coefficient of the salt must be known.
The Van't Hoff factor (i) is a dimensionless number that is used to describe the degree of dissociation or association of a solute in a solution. It is defined as the ratio of the number of particles in solution to the number of solute molecules added to the solution.
For a solute that dissociates into two or more ions, the Van't Hoff factor is greater than 1, and it is equal to the number of ions produced by the dissociation of one molecule of the solute. For example, if a solute dissociates into two ions, its Van't Hoff factor would be 2.
For a solute that associates to form larger species in solution, the Van't Hoff factor is less than 1. For example, if solute associates to form dimers in solution, its Van't Hoff factor would be 0.5.
Therefore, Considering the information in the Introduction section, the best explanation for this difficulty is the value of the van't Hoff coefficient of the salt must be known.
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Which of the following statements is the best example of a scientific conclusion?
A. A driver must use a turn signal when turning left.
B. Less force is used to make a small car go as fast as a large truck.
OC. In most states, the law requires you to wear a seat belt.
OD. Only people who pass a driver's test are qualified to drive.
answer: option (b) because this option refers to physics
a student fails to dry their 250 ml beaker between trials 2 and 3. what effect does this have on the calculated molarity of hydrogen peroxide for trial 3?
It is important to properly dry a beaker between trials to ensure accurate measurement of the volume of a solution and to obtain accurate results in chemical experiments and the volume of the hydrogen peroxide solution in trial 3 will be (250 + x) / 1000 liters.
Detailed Explanation:
Accurate measurement of the volume of a liquid in a laboratory setting is crucial for obtaining accurate results in chemical experiments. When a beaker is not properly dried between trials, any residual water or previous solution can alter the volume of the subsequent solution, affecting the calculated molarity.
The molarity of a solution is defined as the number of moles of solute per liter of solution. The formula for calculating molarity is given by:
Molarity (M) = Number of moles of solute/Volume of solution (in liters)
In the case of a 250 ml beaker, the volume of solution is 0.25 liters. If a student fails to dry the beaker between trials 2 and 3, any residual water or previous solution will alter the volume of the hydrogen peroxide solution used in trial 3. This means that the volume of the hydrogen peroxide solution in the beaker will no longer be equal to 250 ml, which will affect the calculated molarity.
Let's say that the volume of the residual water or previous solution in the beaker was x ml. The volume of the hydrogen peroxide solution in trial 3 will now be 250 + x ml. To convert this volume to liters, we divide by 1000, so the volume of the hydrogen peroxide solution in trial 3 will be (250 + x) / 1000 liters.
When we use this new volume in the molarity calculation formula, the calculated molarity will be different from the molarity calculated if the beaker was properly dried. This difference in molarity could affect the validity of the results obtained in trial 3, potentially leading to inaccurate conclusions about the experiment.
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how is the full moon an archetype in the alchemist
In "The Alchemist," the full moon is used as an archetype to represent change and transformation.
The full moon symbolizes the completion of a cycle, the coming to fruition of something that has been growing and developing. This is related to the theme of the alchemist's journey, as the main character, Santiago, embarks on a quest to fulfill his personal legend and transform himself into the person he was meant to be.
The full moon also represents a moment of heightened spiritual energy, when the forces of nature are in alignment and magic is said to be at its strongest. In the context of "The Alchemist," the full moon symbolizes a moment of increased spiritual awareness and understanding, when Santiago is able to connect more deeply with the world around him and with the spiritual forces that guide his journey.
Ultimately, the full moon is an archetype in "The Alchemist" that represents the power of change and transformation, both in the world and within the individual. By embracing this archetype and the lessons it teaches, Santiago is able to grow and evolve, moving closer to his personal legend and fulfilling his destiny.
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Which is the best method to synthesize the following compound? CH3-C-0-CH3? A) CH3-C-H + CH3OH B) CH3-C-NH2 + CH3ONa C) CH3-C-Cl + CH3ONA D) CH3-C-OH + CH3OH E) CH3-C-H + CH3ONa
D. CH3-C-OH+CH3OH
Ethers are a subclass of organic compounds that have an oxygen atom linked to two carbon atoms, and CH3-C-0-CH3 is one of these molecules.
An alcohol (CH3OH) and an alkoxide are combined to create this ether (CH3-C-OH). Williamson ether synthesis is the name given to the reaction in which an alkoxide intermediate is created and subsequently attacked by alcohol to produce the ether product.
The appropriate reactants for this reaction are shown in Option D, CH3-C-OH + CH3OH. Option A, CH3-C-H + CH3OH, represents a reaction between an alcohol and an alkane (CH3-C-H), which does not result in the formation of an ether. The reaction between an amine and sodium methoxide in option B, CH3-C-NH2 + CH3ONa, will result in a salt rather than an ether.
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Why is CHCl3polar even though the electronegativity difference is smaller than 1.0
?
CHCl3 molecule is polar because of the asymmetric bond distribution that produces a dipole moment and results in a polar molecule.
What is a definition of polarity ?
An object has polarity when it has two distinct, opposing poles that can either attract or repel one another. The phrase is frequently used to describe the movement of electrons in the fields of electricity, magnetism, chemistry, and electronic signaling.
Because chlorine is exerting more of a pull on the electrons that it shares with carbon, CHCl3 is polar. The force atoms exert on shared electrons in a covalent connection is known as electronegativity. In general, an element is more electronegative the closer it is to fluorine on the periodic table.
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How many grams of Mg3(PO4)2 are in 6.5 x10^24 formula units?
The number of grams of magnesium phosphate in 6.5 × 10²⁴ formula units is 2836.21 grams.
How to calculate mass?The mass of a substance can be calculated by multiplying the number of moles in the substance by its molar mass.
mass = moles × molar mass
According to this question, the formula units of magnesium phosphate is 6.5 × 10²⁴ formula units. The number of moles is calculated as follows:
no of moles = 6.5 × 10²⁴ formula units ÷ 6.02 × 10²³
no of moles = 10.79 moles
mass of magnesium phosphate = 10.79mol × 262.855 g/mol = 2836.21 grams.
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please write the symbols for the cation and anion that make up each ionic compound. mni3
MNi3 is an ionic compound composed of a metal cation (M+) and a polyatomic anion (Ni3-).
In ionic compounds, the metal cation is typically represented by its elemental symbol, such as M in this case, while the anion is represented by its chemical formula, such as Ni3- in this case.
Ionic compounds are formed through the transfer of electrons from a metal to a nonmetal, resulting in the formation of positively charged cations and negatively charged anions. These charged species are held together by electrostatic forces, resulting in the formation of a solid crystal lattice.
In the case of MNi3, the metal cation is positively charged, while the Ni3- anion is negatively charged. These charged species attract each other and form a solid crystal lattice.
It's important to note that the actual identity of the metal cation M can be determined by considering the oxidation state of the metal and the charge on the Ni3- anion. For example, if the metal has an oxidation state of +3 and the Ni3- anion has a charge of -3, the metal cation could be aluminum (Al3+), while if the metal has an oxidation state of +2 and the Ni3- anion has a charge of -3, the metal cation could be magnesium (Mg2+).
In conclusion, ionic compounds are formed by the transfer of electrons between a metal cation and a nonmetal anion, resulting in the formation of positively charged cations and negatively charged anions. These charged species are held together by electrostatic forces, resulting in the formation of a solid crystal lattice. The actual identity of the metal cation can be determined by considering the oxidation state of the metal and the charge on the anion.
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Lucite contain 59. 9 g C, 8. 06 g H,
and 32. 0 g O. You want to determine the empirical formula. How many mole of C are in the ample?
The number of moles of Carbon in the sample is 4.99 moles
How to calculate number of moles?The number of moles in a substance can be calculated by dividing the mass of the substance by its molar mass as follows:
moles = mass ÷ molar mass
According to this question, Lucite contain 59.9 g C, 8.06 g H, and 32.0 g O. The moles of C can be calculated as follows:
Molar mass of C = 12g/mol
moles = 59.9g ÷ 12g/mol
moles = 4.99 moles
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Aspartame is an artificial sweetener, it
consists of the elements C, H, O and N.
The complete combustion of 0.001 mol of
aspartame gives 162 mg of water. Its per-
cent mass composition is given as: C: 57.1
%, H: 6.1 %, N: 9.5 %.
a) Calculate the percentage by mass of
oxygen.
b) Calculate the number of mole atoms of
H present in 1 molecule of aspartame.
Deduce the number of H atoms present
in 1 molecule of aspartame.
c) Determine the molecular formula of
aspartame.
Answer:
Explanation:
Aspartame⇒ C14H18N2O5
SO, the number of atoms of H contain in 1 molecule of Aspartame is 18.
1 mole of h = 1g
27.3= Oxygen percentage
A 30 mº tank contains 14 m3 of liquid n-butane in equilibrium with its vapor at 25°C Estimate the mass of n-butane vapor in the tank. The vapor pressure of n-butane at the given temperature is 2.43 bar. The characteristic properties of n-butane are given in the following table: Molar mass T/K Pc/bar Zo cm molt T./K 1-Butane 58.123 0.200 425.1 37.96 0.274 255 2727 The values of Rare given in the following table: Values of the Universal Gas Constant R = 8.314 Jmol K-' = 8.314 mn® Pumol-K! 83.14 cm bar mol"'*'-8314 cm.Pamol - 82.06 cm (atm) mol. 62,356 cm (tor) mol 1.987 (cal) mot K - 1.986 (Btu)(tb mol)(R)! 0.7302 (t)" (atm) (Ib mol)"(R) 10.73 ()" (pnia) (Ib mol)" (R)" 1545 (A) (1) (tb mol) (R) The mass of n-butane vapor in the tank is kg
Mass of n-butane is 72.008kg and the moles is 3.7.
This question requires the use of the ideal gas law and the information given in the problem to determine the mass of n-butane vapor in the tank. The Ideal Gas Law is a fundamental equation used in physics and engineering to describe the behavior of an ideal gas, which is a theoretical type of gas that consists of large numbers of point-like particles with no intermolecular interactions. The law states that the pressure, volume, and temperature of an ideal gas are directly proportional to each other. It is expressed where P is pressure, V is volume, n is the number of moles of the gas, R is the universal gas constant, and T is the temperature in Kelvin. The Ideal Gas Law is widely used in various fields, including thermodynamics, atmospheric science, and combustion engineering. To solve this, you would first need to calculate the number of moles of n-butane in the tank using the volume and ideal gas law. Then, you would use the molar mass of n-butane to convert the number of moles to mass in kilograms.
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A group of cows are eating grass in a field. What type of energy are they getting from the grass?
Answer:chemical drive
The chemical energy contained in the bonds between the atoms of the carbohydrates in the grass is consumed by the cow when it eats grass. The grass will be broken down within the calf to produce energy that is used to create ATP.
Explanation:
chemical drive
The chemical energy contained in the bonds between the atoms of the carbohydrates in the grass is consumed by the cow when it eats grass. The grass will be broken down within the calf to produce energy that is used to create ATP.
An herbicide contains only C , H , Cl , and N . The complete combustion of a 175.0 mg sample of the herbicide in excess oxygen produced 183.0 mL of CO2 and 106.8 mL of H2O vapor at STP. A separate analysis determined the 175.0 mg sample contained 48.25 mg Cl . Determine the percent composition of the herbicide.
The herbicide has a percent composition of carbon 56 %, hydrogen 5.37 %, Cl 27.57 %, and N 11.06%.
1 mole of gas has a volume of 22.4 L. The molar mass of a gas is equal to 1 mole of the gas. As a result, the molar mass is equal to the mass of gas at 22.4 L.
Calculation of the herbicide's percent183.0 mL of carbon dioxide are generated.
Carbon has a molar mass of 12 g.
In 183.0 mL of carbon dioxide, there are
22400 mL = 1 mol
183 mL = 1 x 183 mol
22400
183 mL= 0.00817 mole
A mole of carbon dioxide contains the same number of moles of carbon.
The mass of carbon is as a result:
1 mole = 12 g
0.00817 mole = 12 g x 0.00817 mole
0.00817 mole = 0.098 g
so the mass of carbon is 0.098 g
The volume of water vapor produced is 122 mL.
The molar mass of hydrogen is 1 g/mol
The mass of water vapors produced is:
22400 mL = 1 mol
106.8 mL = 1 x 106.8 mol
22400
106.8 mL= 0.0047 mole
mass = moles x mass molar
mass = 0.0047 mole 2g/ moles = 0.0094 g
A total of 0.0047 mol of water vapor is generated.
Half as many moles of hydrogen as water are present. As a result, there are 0.0047 moles of hydrogen.
There is 0.0094 g of hydrogen produced.
Cl weighs 48.25 mg in the sample.
Herbicide weighs 175 mg.
The sample's nitrogen content is measured as:
N = total - C+H+Cl
N = 0.175 - (0.098 g + 0.0094 g + 0.04825 g)
N = 0.01935 g
%C = 0.098/ 0.175 x 100 = 56 %
% H = 0.0094 / 0.175 x 100 = 5.37 %
% Cl = 0.04825 / 0.175 x 100 = 27.57 %
% N = 0.01935 / 0.175 x 100 = 11.06 %
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