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A mineral's other physical characteristics and the form that its crystals assume can differ. Kyawthuite is the rarest mineral on the planet. There is just one crystal known to exist, and it was discovered in Myanmar's Mogok region.
What is the most unique mineral?On our globe, minerals can be found in a variety of forms, from genuine gem-like hidden treasures to dazzling flecks in sand or gravel. Minerals are organic, or naturally occurring elements or compounds that do not contain carbon, according to the U.S. Geological Society(opens in new tab). Every kind of mineral has a distinct chemical composition and a well-ordered interior structure. Along with other physical characteristics, a mineral's crystals can take on many shapes.Kyawthuite is the most uncommon mineral in the world. In the Mogok region of Myanmar, there is only one crystal that has been identified. It was given official recognition by the International Mineralogical Association in 2015, according to Caltech's mineral database(opens in new tab), and is a tiny (1.61-karat), deep orange gemstone.To Learn more About mineral's Refer To:
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Related Questions
Conservation of energy requires that, in a closed system, which of the following is true?
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Conservation of energy requires that, in a closed system, kinetic energy of the following.
What is kinetic energy?
Kinetic energy is the power of motion, which can be observed in the movement of objects or subatomic particles. All particles and moving objects contain kinetic energy. When something moves, whether it's a person walking, a baseball soaring through the air, a piece of food falling from a table, or a charged particle in an electric field, it has kinetic energy.
What is conservation?
Energy cannot be created or destroyed, according to the energy conservation principle. It can, however, change its shape. In an isolated system, all forms of energy have a fixed total energy.
Therefore, Conservation of energy requires that, in a closed system, kinetic energy of the following.
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compare the processes that occur when methanol ( ), hydrogen chloride (hcl), and sodium hydroxide (naoh) dissolve in water. write equations and prepare sketches showing the form in which each of these compounds is present in its respective solution.
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The like dissolves like means polar dissolves in polar and non polar dissolves in non polar. CH₃OH, NaOH and HCl are polar compounds and H₂O is also a polar compound.
1) The methanol is a polar compound. The water is also a polar compound. The methanol and water makes hydrogen bonding and soluble in water.
2) The hydrochloric acid , HCl is an inorganic compound and water is also in organic compound. The ionic equation is :
HCl + H₂O ---> H₃O⁺ + Cl⁻
3) The sodium hydroxide , NaOH is the polar compound and dissolves in the water. The ionic equation is given as :
NaOH + H₂O ---> Na⁺ + OH⁻ + H⁺
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Trans-1,4-dibromocylohexane is more stable than the cis isomer because only the trans isomer can adopt a conformation in which both bromine
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In contrast to its cis isomer, 1, 4-trans disubstituted cyclohexane exhibits 1, 3 diaxial interaction, making it more stable.
A 1 4 trans disubstituted cyclohexane or its cis isomer, which is more stable? In contrast to its cis isomer, 1, 4-trans disubstituted cyclohexane exhibits 1, 3 diaxial interaction, making it more stable.The presence of both methyl groups in the equatorial position in trans - 1,4 -dimethylcyclohexane causes the trans isomer to be more stable than the cis isomer.4) Chair form is the trans-1,4-cyclohexanediol conformer that is the most stable.<br>5) The boat conformer is the Cis-1,4-cyclohexanediol conformer with the highest stability.As a result of one methyl's requirement to be axial, the cis isomer is less stable than the trans isomer.By 1.8 kcal, the cis isomer is therefore less stable than the trans isomer.The A-values for each axial substituent should be added up to determine the stability of the chair conformation.To learn more about disubstituted cyclohexane refer
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The structure of one form of boron nitride is represented above. This form of boron nitride is one of the hardest substances known. Which of the following best helps explain why boron nitride is so hard?
answer choices
O Boron ions and nitrogen ions are held together by ionic bonds.
O Boron nitride is a network solid of atoms connected by covalent bonds with fixed bond angles.
O Boron nitride is an alloy, and alloys are typically harder than the elements used to make them.
O Boron nitride is a polymer made of long chains of boron atoms and nitrogen atoms held together by dispersion forces.
Answers
A network solid made of atoms joined by covalent bonds with set bond angles is called boron nitride. the best helps explain why boron nitride is so hard.
What is the boron ?
Chemical element boron has the atomic number 5 and the letter B in its symbol. It is a nonmetallic, trivalent-metalloid element with a black or brown-black appearance. Boron is found in many minerals and is used industrially in various compounds. It is present in most soils, seawater, and some plants. Boron has low electrical and thermal conductivity and is not particularly reactive. It is one of the few elements that can form stable compounds with carbon, although these are rare. Boron is an essential trace element for plants and animals, but has no known role in human physiology. It is used in some industrial and medical applications and is an important component of certain insecticides and fertilizers. Boron compounds are also used as mild antiseptics and as wood preservatives.
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Determine whether each of the following chemical reactions will occur. If t the products of the reaction. If they will not, explain why not 1) --Li + _ Pb(OH)2 → 2)__C4H8 + 02 →3)__KOH+ ___BaF2-->4) __AICI3+__Ag2SO45)__Fe(OH)3+____NaCI--
Answers
Yes, all of the above chemical processes will occur.
If the final products of the reaction are LiOH + Pb and CO2 + H2O.
1. Lithium hydroxide and lead(II) hydroxide combine to form LiOH and Pb(OH)2 (lead).
Li + Pb(OH)₂LiOH + Pb
is the chemical formula for this reaction.
2. Carbon dioxide (CO2) and water (H2O) are the products of the reaction between butane (C4H8) and oxygen (O2) (water).
C4H8 + O2 + CO2 + H2O
is the chemical formula for a combustion reaction.
3. Due to their chemical incompatibility, potassium hydroxide (KOH) and barium fluoride (BaF2) cannot mix.
4. The chemical incompatibility between silver sulfate (Ag2SO4) and aluminum iodide (AICI3) prevents their reaction.
5. Because sodium chloride (NaCl) and iron(III) hydroxide {Fe(OH)}₃ are chemically incompatible, they cannot combine.
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Write the rate law for the following elementary reaction: O3(g) →O2(g) +O(g) Use k1 to stand for the rate constant.
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The rate law for the following elementary reaction: O3(g) →O2(g) +O(g) is k[O3][O] where k is rate constant.
The coefficients of the reactants in the balanced equation can be used to get the rate law for an elementary reaction. For instance, rate = k[A]^2[B] is the rate law for the elementary reaction 2A + B products.
Rate law = k[O3][O] describes how quickly ozone breaks down into molecular oxygen (O3 -> O2 + O). This process' suggested mechanism is O3 => O + O2 and O + O3 -> 2O2. From these fundamental steps, derive the rate law. The assumptions you make for the derivation should be stated clearly. The rate of the slowest step, often known as the rate-determining step, determines the total rate of a response. One atom is divided into two or more atoms in this reaction, which is referred to as decomposition.
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what would the result have been if there were five exons and four introns? sketch what this would look like an electron micrograph
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If there had been five exons and four introns, the result would have been. The four introns will be forced to loop in order to bring out the adjacent exons together.
An exon is any part of a gene that will be included in the final mature RNA produced by that gene after introns are removed via RNA splicing. Exons refer to both the DNA sequence within a gene and the corresponding RNA transcript sequence. In RNA splicing, introns are removed and exons are covalently joined to form mature RNA. The genome is made up of the entire set of genes for a species, and the exome is made up of the entire set of exons."The concept of the cistron must be replaced by that of a transcription unit," wrote American biochemist Walter Gilbert in 1978.
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Most chemicals can be cleaned up with a general spill kit, but a few chemicals require specialized spill procedures. For each substance listed, determine whether a general spill kit is sufficient or if a specialized spill kit is needed.
mercury _________
phosphoric acid ________
methanol ________
hydrofluoric acid ________
acetone _______
Answers
A general spill kit is sufficient or if a specialized spill kit is needed. is determined as follows
Hydrofluoric acid - Specialized spill kit is neededSpecial mercury - Specialized spill kit is neededSpecial phosphoric acid - General spill kit is SufficientAcetone - General spill kit is SufficientGeneral methanol - General spill kit is SufficientWhat is in a chemical spill kit?A chemical spill kit should include absorbent materials like vermiculite or "spill pillows," as well as neutralising agents for acids like sodium bicarbonate or sodium carbonate. Alkali spill neutralizers like citric acid or sodium bisulfate.
Acid, base, and solvent sorbent ingredients are typically included in spill kits. There are additional spill kits for certain substances, such as hydrofluoric acid or mercury.
You can encounter either a straightforward chemical spill or a complicated chemical spill. Simple chemical spills are contained, minor, and pose few risks.
When trying to equip your company with the greatest tools to safeguard it against damage brought on by spills, there are three primary categories of spill kits to take into account.
General Purpose Spill Kit.
Oil Only Spill Kit.
Hazchem Spill Kit.
The kind oft required for the cleanup of chemicals is determined by the nature of the chemical. If a chemical is highly corrosive or toxic, it follows that a special spill kit is required to clean up a spill of the chemicals in order to ensure minimum damage. The spill kit required for each chemical is shown below;
Hydrofluoric acid - Specialized spill kit is needed
Special mercury - Specialized spill kit is needed
Special phosphoric acid - General spill kit is Sufficient
Acetone - General spill kit is Sufficient
General methanol - General spill kit is Sufficient
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heck the box next to each molecule on the right that has the shape of the model molecule on the left:
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Due to the core atom's (Br) sp3d2 hybridization, the molecule has an octahedral form, but Br has two lone pairs of electrons in the axial position, giving it a square planar shape.
All of the information on the chemical molecule bromine pentafluoride is provided in the hybridization of bromine pentafluoride notes. It is a hybrid molecule made up of five fluorine atoms, five pentavalent bromine atoms, and one pair of missing electrons. Since it is so reactive, oxidizers are added to chemical reactions and commercial rocket propellants.
A square pyramidal molecular structure is produced via the hybridization of bromine pentafluoride, which results in an sp3d2 hybridization. Due to the covalent electron sharing and a bond angle of roughly 90 degrees, the hybrid molecule features six sigma bonds. Two bromine electrons must move from its 4p orbital to its 4d orbital for hybridization to take place.
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What can be learned from the journal "ISICLE: A pipeline of molecular collision cross-section calculations to build a large in silico reference library for compound identification"?
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Identification of metabolites and other compounds in complicated samples will alter our knowledge of the function these chemically varied molecules play in biological systems.
Despite recent developments, metabolomics investigations continue to identify an excessive number of characteristics that cannot be reliably attributed to a chemical structure. The single biggest drawback in metabolomics, the reliance on reference libraries created from study of real reference molecules, is what causes this deficiency. In order to do this, we created the in silico chemical library engine (ISiCLE), a cheminformatics method for creating libraries of chemical attributes that is compatible with high-performance computers. In the instantiation outlined here, chemical identities are used as input to estimate likely three-dimensional molecule conformers, from which collision cross sections (CCS) are produced. Modern first-principles simulation is used in this method to produce structures and libraries without the need for training data. It is differentiated by its use of molecular dynamics, quantum chemistry, and ion mobility calculations.
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fill in the blanks with the correct notation, atomic symbols, mass number, atomic number, decay type, and/or emission particles
Answers
Writing for atomic symbols looks like this: [tex]x^{A}_{^{Z} }[/tex] , Here, A denotes the mass number, Z the atomic number, while alpha, beta, and gama denote the various forms of decay.
The mass number, sometimes referred to as the atomic mass number or nucleon number, is the total number of protons and neutrons, which are collectively known as nucleons, in an atomic nucleus (symbol A, from the German word atomic number).while alpha, beta, and gama denote the various forms of decay. In chemistry, chemical symbols are used to represent chemical elements, functional groups, and compounds. Chemical elements are symbolised using one or two letters from the Latin alphabet, usually with the first letter capitalised.
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Material
Al
Fe
Cd
Pt
Specific Heat Capacity
0.90
0.45
0.21
0.13
In an experiment, 400 J of energy was absorbed
by each of the four metals (each having a mass
of 10 g) in the above table. Which material
experienced the greatest temperature change?
(a) aluminum
(b) cadmium
(c) iron
(d) platinum
Answers
which of the following products would be obtained in the highest yield from the reaction below? b d e a
Answers
The highest yield obtained from the reaction is 2-methylcyclopentan-1-ol.
In the reaction provided, 2-Methyl-1-bromocyclopentane is reacted with KOH, which acts as a base. KOH will abstract a proton from the most acidic proton of the 2-Methyl-1-bromocyclopentane. This reaction is called an "E2" elimination reaction.
E2 reactions are typically characterized by forming a carbocation intermediate, which then undergoes deprotonation to form the final product.
In this case, the most acidic proton of 2-Methyl-1-bromocyclopentane is the alpha proton (the proton on the carbon atom adjacent to the bromine atom). The deprotonation of this proton forms the carbocation intermediate which will then lose a bromide ion to form 2-methylcyclopentan-1-ol, the product that will be obtained in the highest yield.
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Correct question: Which of the following products would be obtained the highest yield from the reaction below?
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11. a student has two identical guitar strings of the same length. one has a tension f1. when he plucks this string, it produces a sound of 440 hz for its fundamental note. the second string has a tension that is 1.0% higher than the first, f2
Answers
The period of the vibration 2.27 milliseconds.
The mass of a string under tension can be determined in what way?m = V provides information about the string's mass. For instance, the volume V = 0.398 cm3 and mass m = 1.140.398 = 0.454 gm of a nylon string with a 1.30 mm = 0.13 cm diameter and a length of 30 cm, respectively Typically, a racquet's entire string mass is 15 grams (0.015 lb), or about that.
T=f1 T = f 1 is the formula for calculating an oscillation's period, which is the inverse of frequency. This translates into the following in the example: T=1440 Hz=0.00227 s=2.27 ms T = 1 440 H z=0.00227 s=2.27 ms 2.27 milliseconds pass during each vibration.
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The volume of a gas is 450 mL when its pressure is 1.00 atm. If the temperature of the gas does not change, what is theO 0.225 atm
O 0.444 atm
O 2.25 atm
O 4.44 atm
Answers
The volume of a gas is 450 mL when its pressure is 1.00 atm. If the temperature of the gas does not change, so the pressure is 0.444 atm.
The volume of a gas is inversely proportional to its pressure when the temperature is constant. This relationship is described by the Ideal Gas Law PV = nRT , where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature.
If the volume of the gas is 450 mL and the temperature does not change, we can use the following formula to find the new pressure:
V1/P1 = V2/P2
Where V1 is the initial volume, P1 is the initial pressure, V2 is the final volume and P2 is the final pressure.
By substituting the given values:
450mL/1.00atm = V2/P2
To find P2: P2 = V2*P1/V1
P2 = (450mL*1atm)/450mL = 0.444 atm
So the answer is 0.444 atm.
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a bunsen burner, named after robert bunsen, is a common piece of laboratory equipment that produces a single open gas flame, which is used for heating, sterilization, and combustion
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The Robert Bunsen burner, a common scientific tool that produces a single open gas flame used for heating, sterilising, and combustion, is named after Robert Bunsen.
The gas may be natural gas, which is mostly made up of methane, or liquefied petroleum gas, such as propane or butane. It produces a single open gas flame that is used for heating, sterilizing, and combustion. Air and gas mixing chamber: a barrel. The foundation stabilizes and supports the burner. The two types of Bunsen burner flames are as follows: When the air opening is open, a flame known as the non-luminous or blue flame, which is used for heating, is produced. The residual gas forms a secondary, practically colorless flame that is visible as a larger, outer cone when it is completely oxidized by the surrounding air. It burns with a primary flame that is a light blue color.
[tex]CH4(g)+2O2(g)→2H2O(l)+CO2(g)[/tex]
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complete question: What is a bunsen burner?
Step 1: ?? (slow)Step 2: NO2(g)+F(g)→NO2F(g) (fast)Overall: 2 NO2(g)+F2(g)→2NO2F(g) The overall reaction represented above is proposed to take place through two elementary steps. Which of the following statements about the chemical equation for step 1 and the rate law for the overall reaction is correct?answer choicesThe chemical equation for step 1 is NO2(g)+F2(g)→NO2F(g)+F(g), and the rate law for the overall reaction is rate=k[NO2][F2].The chemical equation for step 1 is NO2(g)+F(g)→NO2F(g)+F2(g), and the rate law for the overall reaction is rate=k[NO2][F].The chemical equation for step 1 is 2NO2(g)+F2(g)→2NO2F(g), and the rate law for the overall reaction is rate=k[NO2][F].The chemical equation for step 1 is 3NO2(g)+F2(g)+F(g)→3NO2F(g), and the rate law for the overall reaction is rate=k[NO2]2[F2].
Answers
The correct rate law that is consistent with the elementary steps in the mechanism is rate = k[NO2][CO].
The rate law is a mathematical expression that describes how the reaction rate changes with respect to the concentrations of the reactants. In this proposed mechanism, the reaction occurs through two steps: NO2(g) → NO3(g) + NO(g) and NO3(g) + CO(g) → NO2(g) + CO2(g).
The rate of the reaction is determined by the rate of the slowest step, which is the first step. Thus, the rate law is consistent with the elementary steps in the mechanism if it includes the concentrations of NO2 and CO as reactants, as they are the only species involved in the rate-determining step. Therefore, the correct rate law is rate = k[NO2][CO].
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The question is -
Step 1:2NO2(g)→NO3(g)+NO(g)(slow)
Step 2:NO3(g)+CO(g)→NO2(g)+CO2(g)(fast)
A proposed two-step mechanism for the chemical reaction NO2(g)+CO(g)→NO(g)+CO2(g) is shown above. Which of the following equations is a correct rate law that is consistent with the elementary steps in the mechanism?
which of the following compounds has the strongest intermolecular forces? group of answer choices c7h16 c8h18 c9h20 c5h12 c6h14
Answers
The following compounds has the strongest intermolecular forces,C8H18 has the strongest intermolecular forces.
What is the compounds ?
A compound is a chemical combination of two or more elements in a fixed ratio. Compounds can be formed from any combination of elements, although the elements must be in the correct ratio in order for the compound to exist. Compounds can exist as solids, gases, or liquids, depending on the elements that comprise it and the desired conditions. Compounds can also be classified as organic or inorganic, depending on whether they contain carbon atoms or not. Compounds are essential in everyday life and are used in a variety of applications, from pharmaceuticals to cleaning products.
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what of the following best describes the expected product of the reaction below? an aldehyde a primary alcohol a ketone a secondary alcohol
Answers
expected product of the reaction below an aldehyde a primary alcohol a ketone a secondary alcohol -The expected product of the aldehyde is a primary alcohol.
The reaction shown is a reduction of a carbonyl group, specifically an aldehyde, using lithium aluminum hydride (LiAlH4) as a reducing agent. Reduction of a carbonyl group converts the carbonyl group (C=O) into a hydroxyl group (C-OH). Since the starting material is an aldehyde, and aldehydes typically have at least one hydrogen atom attached to the carbon atom adjacent to the carbonyl group, the product will be a primary alcohol. Secondary and tertiary alcohols are not formed in this reaction, because there is no alpha-hydrogen available in those cases.
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What stress would shift the equilibrium position of the following system to the right?
N2O3(g) ⇌ NO(g) + NO2(g); ΔH is positive
Group of answer choices
Increasing the concentration of N2O3
Heating the system
Adding a catalyst
Decreasing the concentration of NO
Why the answer is not - Increasing the concentration of N2O3 -?
Answers
Answer:
Heating the system
It's the correct answer on the test. I don't understand this very well, but adding a catalyst doesn't change the equilibrium, and increasing the concentration of NO would shift it to the left. Heating the system will shift it right in an endothermic equation, which this is.
Explanation:
to separate a homogeneous mixture of salt water, which of the following pieces of laboratory equipment is necessary?
Answers
C. condenser, Distillation is a common technique used to separate homogeneous mixtures. The combination is separated by distillation using the various boiling points of the constituents.
Boiling the mixture causes one of the chemicals to evaporate. The compound is instantly cooled through the condenser once it has evaporated, and it is then collected in a flask at the opposite end. The sole piece of laboratory apparatus listed in the possible answers that fits this method is [C]. A buret is used in titration tests to measure concentrations, a pipet is used to transfer chemicals in tiny amounts, and a filter would be used to separate a heterogeneous mixture. For separating heterogeneous mixtures such an organic solvent and an aqueous solvent, a separatory funnel is helpful.
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workers using volatile hazardous materials. Which of the following statements is true?A. A worker should feel a steady draft entering the face of the hood.B. A worker should not feel air moving around the chemical hood.C. A worker should feel a steady draft emerging from the face of the hood.
Answers
A worker should feel a steady draft emerging from the face of the hood.
What is emerging?Emerging technology is defined as the application of new and innovative technologies to existing products and services to create new ones. This form of technology is often used as a way to gain competitive advantage in the market and to stay ahead of the competition. Examples of emerging technology include artificial intelligence (AI), virtual reality (VR), robotics, blockchain, and the Internet of Things (IoT). These new technologies have the potential to revolutionize the way we do business and provide new opportunities for both individuals and businesses. As such, many companies are investing heavily in the development of these technologies in order to stay ahead of the competition and remain competitive.
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which of the following is a chemical change?group of answer choicesO ice melting O ice being carvedwaterO boiling water O breaking down into hydrogen and oxygen
Answers
Breaking down into hydrogen and oxygen is chemical change among given changes.
A chemical change is a change in which one or more substances are transformed into one or more different substances through chemical reactions. This is characterized by a change in the chemical properties or composition of a substance. In this case, the breakdown of water into hydrogen and oxygen through an electrolysis process is a chemical change as it results in new substances (hydrogen and oxygen) that have different properties than the original substance (water).
The other options: ice melting, ice being carved, water boiling are physical changes as they result in a change in physical properties like temperature and shape, but the chemical composition and identity of the substance remains the same.
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studies have found that the number of particles deposited into the lungs increases by a factor of ten when frying indoors versus frying outdoors.
Answers
Frying food indoors can release a significant amount of particles into the air, which can then be inhaled.
Studies have found that the number of particles deposited into the lungs increases by a factor of ten when frying indoors compared to frying outdoors. This is because when frying indoors, the particles released by the cooking process are trapped in the enclosed space, leading to a higher concentration of particles in the air. These particles can contain harmful substances such as polycyclic aromatic hydrocarbons (PAHs) and fine particulate matter (PM2.5), which can have negative effects on human health. Therefore, it is important to use proper ventilation and to fry food outdoors when possible to reduce exposure to these particles.
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The solubility of BaSO4 in water is 2 mg/L at 25 oC. A 2 mg BaSO4 sample was added to 100 mL water. Some of the solid dissolved while 1.8 mg of it remained as precipitate. The solution is said to be .
Answers
In summary, the solubility of BaSO4 in water is 2 mg/L at 25 oC. When a 2 mg sample of BaSO4 is added.
What is solubility?Solubility is the ability of a substance to dissolve in a solvent, such as water. It is a measure of how much of a substance will dissolve in a given amount of solvent. Solubility is a physical property that can vary depending on the temperature, pressure, and nature of the solvent. The higher the solubility of a substance, the more of it can be dissolved in a given amount of solvent. Different substances have different solubility levels, and some substances are more soluble in certain solvents than in others.
The solubility of a substance is the maximum amount of it that can dissolve in a certain volume of liquid at a given temperature. The solubility of BaSO4 in a specific volume of water at a given temperature is 2 mg/L. When a 2 mg sample of BaSO4 is added to 100 mL water, some of the solid dissolves and the remaining 1.8 mg is left as a precipitate. This means that the solution has reached its saturation point, which is 0.2 mg/L.
The solubility of a substance can be affected by various factors, such as temperature, pressure, and the presence of other substances in the solution. The solubility of BaSO4 is increased as the temperature is increased, and it is decreased as the temperature is decreased. The solubility of BaSO4 is also affected by the presence of other substances in the solution. For example, if the solution contains sodium chloride, it will decrease the solubility of BaSO4.
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Gaseous ammonia chemically reacts with oxygen O2 gas to produce nitrogen monoxide gas and water vapor. Calculate the moles of water produced by the reaction of 0.070mol of ammonia. Be sure your answer has a unit symbol, if necessary, and round it to the correct number of significant digits.
Answers
The moles of the water produced by the reaction of 0.070 mol of ammonia is the 0.175 mol.
The reaction is given as:
4NH₃(g) + 5O₂(g) ---> 4NO(g) + 5H₂O(g)
The moles of ammonia, NH₃ = 0.070 mol
The moles if substances can be calculated as :
The number of moles = mass / molar mass
The 4 moles of the NH₃ will produces the 4 moles of NO
4 moles of ammonia, NH₃ produces the 5 moles of water , H₂O
The moles of water, H₂O = ( 5 / 2 ) × 0.070 mol
= 0.175 mol
Thus, the moles of water, H₂O is 0.175 mol.
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Which of the following provides the correct mathematical operation to convert the number of atoms of a sample to the number of moles?
Choose matching definition
O 2.0 mol × 6.022 × 1023 molecules/mol
O The formula of the compound The atomic masses of each of the elements that make up the compound
O number of atoms/Avogadro's number
O The molar mass of each element
Answers
Option c is the right response. The correct mathematical operation to convert a sample's atom count to its mole count is atoms/number Avogadro's.
Every atom is made up of a nucleus and maybe one or more electrons. The nucleus is made up of one or more protons and several neutrons. Only the most common type of hydrogen is devoid of neutrons. Hydrogen is a chemical element with atomic number 1 and the letter H. Hydrogen is the lightest atom. Under normal conditions, hydrogen is a gas composed of diatomic molecules, which have the formula H2. It is highly combustible, non-toxic, and devoid of flavour, smell, or colour.
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carbonic acid, h2co3 is a weaker acid than sulfurous acid, h2so3. which of the following reactions is more favorable?
Answers
The reaction of sulfurous acid, H2SO3 with water is more favorable than the reaction of carbonic acid, H2CO3 with water.
What is carbonic acid?
Carbonic acid is a weak acid that is formed when carbon dioxide dissolves in water. It is an inorganic acid, meaning it does not contain any carbon atoms in its molecular structure. Carbonic acid is an important component of the natural carbon cycle as it is produced in the oceans and atmosphere and is involved in many biogeochemical processes. Carbonic acid is a weak acid, with a pKa value of 6.3, meaning that it is not very acidic and can easily be neutralized by alkaline substances such as baking soda.
The reaction of sulfurous acid, H2SO3 with water is more favorable than the reaction of carbonic acid, H2CO3 with water. This is because the reaction of H2SO3 with water is an equilibrium reaction with a larger equilibrium constant and therefore favors the reaction product (H2O and H2SO3) over the reactant (H2SO3). The reaction of H2CO3 with water is an endothermic reaction and therefore favors the reactant (H2CO3) over the reaction product (H2O and H2CO3).
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If the concentration of [S2O82−] is doubled while keeping [I−] constant, which of the following experimental results is predicted based on the rate law, and why? A The rate of reaction will remain the same, because k will decrease by half. B The rate of reaction will double, because the rate is directly proportional to [S2O82−].. C The rate of reaction will increase by a factor of four, because two moles of SO42− are produced for each mole of S2O82− consumed. D The rate of reaction will increase by a factor of four, because the reaction is second order overall.If the concentration of [S2O82−] is doubled while keeping [I−] constant, which of the following experimental results is predicted based on the rate law, and why? A The rate of reaction will remain the same, because k will decrease by half. B The rate of reaction will double, because the rate is directly proportional to [S2O82−].. C The rate of reaction will increase by a factor of four, because two moles of SO42− are produced for each mole of S2O82− consumed. D The rate of reaction will increase by a factor of four, because the reaction is second order overall.
Answers
The rate of reaction will double, because the rate is directly proportional to [S2O82−].
What is meant by rate ?
A quantity, amount, or degree of something calculated in relation to one unit of another.A payment or charge that is calculated using another amount. more specifically: the premium per insurance unit. transitive verb rating"Per unit of time" is a frequent sort of rate, and examples include speed, heart rate, and flux.Exchange rates, literacy rates, and electric fields are a few examples of ratios with a non-time denominator.A rate in mathematics is the comparison of two related values expressed in different units.The numerator of the ratio expresses the rate of change in the other variable if the denominator of the ratio is given as a single unit of one of these quantities and it is expected that this quantity can be altered systematically.To learn more about rate refer to
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Describe in detail how you would prepare a pure, dry sample of each case give the salts. in each case give the chemical equation of the reaction that occurs
a) silver chloride starting with silver nitrate
b) copper II sulphate crystals starting with copper II carbonate
Answers
Answer:
a) Silver chloride can be prepared from silver nitrate by adding a chloride ion source such as sodium chloride or hydrochloric acid. The chemical equation for this reaction is:
AgNO3 + NaCl → AgCl + NaNO3
or
AgNO3 + HCl → AgCl + HNO3
To prepare a pure, dry sample of silver chloride, the following steps can be taken:
Prepare a solution of silver nitrate by dissolving a known amount of the solid in distilled water.Prepare a solution of sodium chloride or hydrochloric acid in distilled water.Slowly add the chloride ion source solution to the silver nitrate solution while stirring. The reaction should be exothermic and a white precipitate of silver chloride will form.Allow the mixture to stand for a short period of time to allow any undissolved silver chloride to settle into the bottom of the container.Decant the clear solution from the top of the container, being careful not to lose any of the solid precipitates.Transfer the silver chloride precipitate to a filter funnel and wash it with distilled water to remove any remaining impurities.Allow the precipitate to dry completely by leaving it in an oven or desiccator. Once dry, the sample of silver chloride is now considered pure.b) Copper II Sulphate can be prepared from copper II carbonate by adding sulfuric acid. The chemical equation for this reaction is:
CuCO3 + H2SO4 → CuSO4 + CO2 + H2O
To prepare a pure, dry sample of copper II sulphate, the following steps can be taken:
Prepare a solution of copper II carbonate by dissolving a known amount of the solid in distilled water.Prepare a solution of sulfuric acid in distilled water.Slowly add the sulfuric acid solution to the copper II carbonate solution while stirring. The reaction should be exothermic and a blue precipitate of copper II sulphate will form.Allow the mixture to stand for a short period of time to allow any undissolved copper II sulphate to settle to the bottom of the container.Decant the clear solution from the top of the container, being careful not to lose any of the solid precipitates.Transfer the copper II sulphate precipitate to a filter funnel and wash it with distilled water to remove any remaining impurities.Allow the precipitate to dry completely by leaving it in an oven or desiccator. Once dry, the sample of copper II sulphate is now considered pure.It's important to note that these methods are just one way to prepare the pure salts and other methods may also exist. Additionally, the purity of the final product depends on the purity of the starting materials and the care taken during the preparation process.
