The balanced equation is :
HI(aq) + LiHSO₃(aq) → SO₂(g) + H₂O(l) + LiI(aq).
A chemical reaction is a method wherein one or more materials, also called reactants, are transformed into at least one or more special substances, called merchandise. Materials are both chemical elements or compounds.
A few synthesis reactions can result in more than one product. Photosynthesis is one of the maximum important chemical reactions on earth. It allows plants and a few microbes to transform water and carbon dioxide gas into storable sugar and oxygen.
Chemical compounds are made from atoms of different elements, joined collectively through chemical bonds. A chemical synthesis normally involves the breaking of existing bonds and the formation of recent ones.
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a student has 100. ml of 0.20 m hcl solution. she takes 5.0 ml of this solution and adds it to 10.0 ml of water. she then takes 3.0 ml of this new solution for an experiment. what is the concentration of this solution?
The concentration of the solution is .10M
What is dilution equation?Here given,
V1 = 5.Oml
M1 = .20M
V2 = 10.0ml
We have to find M2
For determining a missing dilution equation value, where M1 and M2 are the molarities of the solutions, expressed in mol/L or M, and V1 and V2 are the volumes of the solutions.
By applying V1M1 = V2M2
By substituting values,
(5.0 ml)(0.20 M) = (10.0 ml) (x M)
x = (5.0)(0.20)/10.0
x = 0.10 M
The fact that one begins with 100. ml and ends with 3.0 ml has no bearing on the final concentration. It would influence the total number of moles of HCl present but not the concentration.
Therefore the concentration of solution is .10M.
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the contract is unacceptable in its current form; revision is required. please revise the contract so it can be forwarded to the vice president. this contract is a mess; fix it before the vice president sees it.
Please update the contract in accordance with the provided information so that it can be sent to the vice chairman.
What is the most recent short definition?The pace at which electrons pass a certain point in a fully functional electrical circuit is referred to as rate. Fundamentally, current is the same as flow. The ampere (AM-pir), also called to as an amp, is the standard measurement unit used throughout.
How would you characterize electric current?When describing how much electrical flows through a network and exactly how it flows inside of an integrated device, the term "electric current" is often employed. It is measured in amperes (A). The ampere number increases with the amount of flow of energy all across circuit.
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in a gas mixture, the partial pressures are nitrogen 423 torr , oxygen 149 torr , and helium 255 torr . part a what is the total pressure, in torr, exerted by the gas mixture? express your answer to three significant figures and include the appropriate units
827.0 torr is the total pressure, in torr, exerted by the gas mixture
The partial pressures of the individual gases make up the total pressure of the gas mixture.
Total pressure= sum of all partial pressure
Total pressure=423+149+255
Total pressure= 827.0 torr
Pressure is defined as force/area. To illustrate the pressure from snow on a roof, divide the weight of the snow by the surface area of the roof. Gases are a typical pressure source in chemistry. A "vacuum" is used to describe the absence of pressure. Humans have long held the belief that vacuums are both improbably rare and unnatural because "nature abhors a vacuum." Actually, this is not the case.
The number of pressure units is ridiculous. It's common to use the torr or mmHg unit. This discussion is solely focused on the height of a mercury column. The atmosphere contains 760 torr, or mmHg. You might also look at mmH2O, which makes use of a related idea.
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I am currently enrolled in AP Chemistry and I want to make sure I am completing this assignment correctly. Any help is greatly appreciated and will leave a positive review! 1) Identify the type(s) of motion that individual molecules can undergo in a molecular solid. 2) When the temperature of a solid copper pipe increase, does the motion of the free electrons increase, decrease, or remain the same? 3) Draw particulate representations of a molecular liquid at a low temperature and a high temperature. Use arrows to represent velocity vectors. 4) Draw particulate representations of molecular gas at a low temperature and a high temperature. Use arrows to represent velocity vectors. 5) Draw a particulate representation of a 1.0 L sample of molecular gas in a cylinder. Draw a second particulate representation of the same sample of gas after it has been compressed to 0.5 liters. Assume that the temperature remains the same. Use arrows to represent velocity vectors. 6) Draw particulate representations that show the differences between a solid, liquid, and gas. Particle motion, intermolecular forces, and overall volume must be highlighted in the representations.
In a molecular solid, individual molecules can undergo various types of motion, including translational motion (movement from one point to another), rotational motion (spinning around a fixed axis), and vibrational motion (oscillating or shaking about a fixed position).
When the temperature of a solid copper pipe increases, the motion of the free electrons within the copper atoms will also increase. This is because an increase in temperature corresponds to an increase in the kinetic energy of the particles in a substance, which leads to an increase in their motion.
In a molecular liquid at a low temperature, the individual molecules will be moving relatively slowly, with relatively low velocities. The arrows representing the velocity vectors of the molecules will be relatively small and widely spaced.
In a molecular liquid at a high temperature, the molecules will be moving more quickly, with higher velocities. The arrows representing the velocity vectors of the molecules will be larger and more closely spaced.
In a molecular gas at a low temperature, the individual molecules will be moving relatively slowly, with relatively low velocities. The arrows representing the velocity vectors of the molecules will be relatively small and widely spaced.
In a molecular gas at a high temperature, the molecules will be moving more quickly, with higher velocities. The arrows representing the velocity vectors of the molecules will be larger and more closely spaced.
In a particulate representation of a 1.0 L sample of molecular gas, the individual molecules will be spaced relatively far apart from each other, with relatively low velocities. The arrows representing the velocity vectors of the molecules will be relatively small and widely spaced.
In a particulate representation of the same sample of gas after it has been compressed to 0.5 liters, the molecules will be spaced much closer together, with higher velocities. The arrows representing the velocity vectors of the molecules will be larger and more closely spaced.
In a particulate representation of a solid, the individual particles will be closely packed together in a regular, ordered arrangement. The particles will be vibrating in place, with little overall movement or change in position. In a particulate representation of a liquid, the particles will be more loosely packed together, with more freedom of movement.
The particles will be moving and flowing past each other, with relatively low velocities. In a particulate representation of a gas, the particles will be spaced far apart from each other, with a large amount of empty space between them. The particles will be moving quickly and randomly in all directions, with relatively high velocities.
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what is the vapor pressure of a solution prepared by dissolving 0.750 moles of c6h12o6 in 5.50 moles of water at 25oc? the vapor pressure of water at 25oc is 23.8 mmhg.
The ratio of partial pressure of the solute to the total pressure will be equal to its mole fraction by which, the partial pressure obtained for C₆H₁₂O₆ is 3.24 mmHg.
What is partial pressure ?Partial pressure of a component in a mixture is the pressure contributed by the component to the total pressure of the mixture. Thus, the partial pressure of a solute contributes to the total pressure in solution.
The mole fraction of a component A in a mixture containing A and B is equal to the ratio of the its partial pressure to the total pressure.
nA / (nA + nB) = pA / pA + pB.
Let pA be the partial pressure of C₆H₁₂O₆ and partial pressure of water is given 23.8 mmHg, then pA is calculated as :
0.750 /(5.50 + 0.750 ) = pA / (pA + 23.8 mmHg)
0.12 = pA / (pA + 23.8 mmHg)
pA = 0.12 pA + 2.856
pA = 3.22 mmHg.
Therefore, the partial pressure of C₆H₁₂O₆ is 3.22 mmHg.
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what volume (in ml) of a 0.203 m naoh solution is needed to neutralize 25.0 ml of a 0.188 m h2so4 solution?
25.0 ml of a 0.188 m h2so4 solution must be neutralized with 46.3 ML (in ml) of a 0.203 m sodium hydroxide solution. In the process of making chlorine, sodium hydroxide is created as a byproduct.
It is crystalline, colourless, and solid in its purest form. These sodium cations and hydroxide anions make up this extremely water-soluble molecule known as sodium hydroxide. Chemical element chlorine has the symbol Cl and atomic number 17. It is the second-lightest halogen, and although it is between fluorine and bromine on the periodic table, most of its properties fall somewhere in the middle. Is called chlorine.
H2SO4 millimoles equal 0.188*25.0 = 4.70mmol NAOH millimoles equal 4.70*(2/1) = 9.40mmol in a volume of 0.203M NAOH equals 9.40*(1/0.203) = 46.3 ML.
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acetic acid is a covalent compound but, when dissolved in water, it is a weak electrolyte. how would you explain this phenomenon?
Acetic acid is a covalent compound but, when dissolved in water, it is a weak electrolyte. It is a vulnerable electrolyte for the reason that compound does now no longer dissociate absolutely to shape ions.
Electrolytes are materials which could behavior power while they may be located in solution. This is because of their capacity to provide charged debris in solution.
These debris are referred to as ions. Acetic acid is a vulnerable acid because it partly dissociates in water ensuing withinside the formation of acetate and hydronium ions. It is a vulnerable electrolyte for the reason that compound does now no longer dissociate absolutely to shape ions.
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suppose a current of .680 ma flows through a copper wire for minutes. calculate how many moles of electrons travel through the wire.be sure your answer has the correct unit symbol and the correct number of significant digits.
The wire is traversed by 1.27 10-2 moles of electrons. A copper wire experiences a 0.680 ma current flow for several minutes. The electron is a subatomic particle with a negative electric charge.
Due to their lack of known components or substructure, electrons, which are part of the first generation of the lepton particle family, are typically considered to be elementary particles.
The mole is a unit of measurement or the starting point for determining how much of a substance is present in a sample. A mole is the avagadro number of molecules.
q = i×t
The terms "charge," "current," and "time" are used here.
I = 680 mA 1 A / 1000 mA
I = 0.680 A
(60 sec. / 1 min.) = 30.0 minutes
t =1800 sec
q = I + t q = 0.680 A 1800 s q = 1224 A sec
q = 1224 Amp.sec
q = 1224 C ( coulomb = ampere × second)
Charge = moles of electrons × charge of an electron
Charge of an electron = 96500 C/mol of e-
1224 C = moles of electrons × 96500 C/mol of e-
Moles of electrons = 1224 C / (96500 C/mol of e-)
Moles of electrons = 1.27×10^-2 moles of e-
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Identify the element with the highest standard free energy of formation.
Group of answer choices
Mn(s)
All elements in their standard states have a value of zero.
K(s)
Ba(s)
Mg(s)
The element with the highest standard free energy of formation is All elements in their standard states have a value of zero.
The correct answer is All elements in their standard states have a value of zero.
What is free energy of formation?The standard free energy of formation of a substance is defined as the free-energy change which results when 1 mol of substance is prepared from its elements at the standard pressure of 1 atm and a given temperature, usually 298 K.
At 25^∘ C , the free energy of formation of H2O (l) is - 56700 cal/mol while that of its ionization to H^ + and OH^ - is 19050 cal mol^-1.
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how much water remains unfrozen after 50.2 kj is transferred as heat from 260 g of liquid water initially at its freezing point?
109 g of water remains unfrozen after transferring 50.2 kj of heat from 260 g of liquid water.
What is freezing point?A liquid turns into a solid at the freezing point. Increased pressure typically causes the freezing point to rise, just like it does for the melting point. Combinations and some organic substances, such as fats, have a freezing point that is lower than their melting points.Every substance has a freezing point, which is the point at which it changes from a liquid to a solid. Since the liquids can be rapidly chilled below their freezing points, they don't solidify until temperatures considerably below freezing.Here given ,
The volume of frozen water is m.
m = LFQ
= 333 kJ/kg x 50.2 kJ
= 0.151 kg
= 151 g.
Consequently, the volume of water that is still liquid is :
260 g − 151 g
= 109 g.
Therefore 109 g of water remains unfrozen.
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2. after work-up, the product of the wittig reaction was recrystallized from hot isopropanol. you were told to do a gravity filtration using a heated stemless funnel if the solution appeared cloudy. what was the likely identity of compound that caused the cloudiness?
The likely identity of compound that caused the cloudiness is because the triphenylphone oxide is the by product in the witting reaction . the likely identity was HCl.
The ethanol does not allow the DNA to dissolve in it. so, the more cold the ethanol the less soluble will be the DNA. the isopropanol is the simplest secondary alcohol. The likely identity is HCl and some of the other gas. The hot iso propanol was use instead of cold isopropanol because of the hot gravity filtration is produce more consistence crystal.
The iso propanol is the colorless and the flammable organic compound.
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a compound has an m peak with relative intensity 84% and an m 2 peak with relative intensity 28%. what is likely present?
An compound m peak has a relative intensity of 84%, and its m 2 peak is 28% stronger. It's probably chlorine. Chemical element chlorine has the symbol Cl and atomic number 17.
It is the second-lightest halogen, and although it is between fluorine and bromine on the periodic table, most of its properties fall somewhere in the middle. At room temperature, chlorine is a yellow-green gas. It is called chlorine.
A compound is a substance created when two or more chemical elements are chemically bonded together. Ionic and covalent bonds are the two most common types of bonds that hold elements in a compound together.
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discuss how spectroscopy may be used to determine the concentration of some molecule. what must be known about the molecule?
A spectrophotometer is a device that counts the number of photons that are absorbed after they have passed through a sample solution. The concentration of the molecule must be known.
The quantitative assessment of a material's reflection or transmission qualities in relation to wavelength is the focus of the branch of electromagnetic spectroscopy known as spectrophotometry. An analytical tool called a spectrophotometer is used to determine the emission or reflection of visible light, UV light, or infrared light objectively. Spectrophotometers calculate intensity as a function of light source wavelength.
The amount of solute in a specific amount of solution determines a concentration of the molecule. The number of moles of solute in 1 L of solution, or molarity, is used to express concentrations.
In chemistry, there are four different forms of concentration of the molecule: volume concentration, number concentration, molar concentration, and mass concentration.
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the pattison company began operations on january 2, 2018, and appropriately uses the installment sales method of accounting. the following data are available for 2018 and 2019:
The deferred gross profit that would appear on the 2019 balance sheet is the amount of revenue that has been earned but not yet received as of the balance sheet date:
$180,000$200,000$285,000$225,000Gross profit deferred is 30% × ($600,000 – ($200,000 + $250,000)) + 40% × ($750,000 – 300,000)= $225,000.
How calculate the deferred gross profit?The deferred gross profit on the 2019 balance sheet is the amount of revenue that has been earned but not yet received as of the balance sheet date.
This can be calculated by taking the gross profit percentage for each revenue type and multiplying it by the difference between the total revenue and the amount of revenue already received.
In this example, that would be 30% of the difference between $600,000 and $200,000 + $250,000 plus 40% of the difference between $750,000 and $300,000, which equals $225,000.
Complete Question:The Pattison Company began operations on January 2, 2018, and appropriately uses the installmentsales method of accounting. The following data are available for 2018 and 2019:
2018 2019
Installment sales $600,000 $750,000
Cash collections from:
2018 sales 200,000 250,000
2019 sales 300,000
Gross profit on sales 30% 40%
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For each of the following sets of atoms and ions, arrange themembers in order of increasing size.
Rank from smallest to largest. To rank items as equivalent, overlapthem.
Se, Te2-. and Se2-
Fe2+, Fe3+, and Mn2+
Ti4+, Sc3+, and Ca
Arranging the atoms and ions from the following sets in the rank from smallest to largest is as Se2-, Te2-, Sc3+, Fe2+, Fe3+ Ca, Ti4+, Sc3+ Mn2
A nucleus and one or more electrons connected to it make up each atom. The nucleus is composed of one or more protons and a sizable number of neutrons. Only the most common kind of hydrogen has no neutrons. Each neutral or ionized atom makes up a solid, liquid, gas, or type of plasma. The two types of fundamental particles that make up an atom are quarks and electrons. Ions are any atom or molecule having a net electrical charge. A proton's charge, which is generally believed to be positive, is equal to and opposite to the charge of an electron, which is supposed to be negative.
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order the intermolecular forces (dipole-dipole, london dispersion, ionic, and hydrogen-bonding) from weakest to strongest . order the intermolecular forces (dipole-dipole, london dispersion, ionic, and hydrogen-bonding) from weakest to strongest . dipole-dipole, london dispersion, ionic, and hydrogen-bonding london dispersion, dipole-dipole, hydrogen-bonding, and ionic hydrogen-bonding, dipole-dipole, london dispersion, and ionic dipole-dipole, ionic, london dispersion, and hydrogen-bonding london dispersion, ionic, dipole-dipole, and hydrogen-bonding
London dispersion < dipole-dipole < hydrogen-bonding < ionic is the correct order of intermolecular forces.
The forces that promote interaction between the solute and solvent molecules and impact their solubility are known as inter-molecular forces of attraction. They were generally categorized as follows:
Ionic: This is the strongest force of attraction between positively and negatively charged atoms or molecules, called ions.
Hydrogen bonds are the forces of attraction that exist in molecules where a hydrogen atom is directly connected to an electronegative atom, such as an oxygen, nitrogen, or fluorine atom.
Dipole-dipole: These occur between polar molecules, which are molecules with a persistent dipole.
The weakest intermolecular force, known as dispersion or London forces, develops in non-polar molecules when an immediate or transient dipole forms.
The intermolecular forces are arranged as follows, from weakest to strongest:
London dispersion < dipole-dipole < hydrogen-bonding < ionic.
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for which properties can a student design an investigation of the electrostatic forces between molecules in a substance?
The melting point, boiling point, surface tension, and vapor pressure of a substance are the properties that a student can use to design an investigation of the electrostatic forces between molecules.
What is melting?The method that will help you measure the melting point temperature of ice is to mix ice and water until equilibrium is reached, but some ice is left that is still melting.When atoms, molecules, or ions are close to one another, there may be intermolecular forces that work to repel or attract them.For the measurement to be accurate, the melting point's modest heating rate is crucial.When ice is heated, its temperature frequently increases, but once it begins to melt, the temperature remains constant.It is common for the temperature of ice to rise when it is heated, but once the ice begins to melt, the temperature remains constant until all of it has melted.To Learn more about melting point refer to:
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Answer:
1. melting point, boiling point, surface tension and vapor pressure
2. deciding on the appropriate equipment
3. it ensures that results are accurate
4. the students should take the average of the results from all four trials
5. surface tension
Explanation:
electrical bonding investigation evidence quick check
Does hydrogen have 1 or 2 valence electrons?.
Hydrogen has a single atomic nucleus. Therefore, there will be one electron overall and one valence electron.
Chemistry's concept of valence, sometimes written as valency, refers to an element's ability to mix with a certain number of other atoms. The phrase, which was first used in 1868, can describe both the general power of the combination of an element as well as the numerical magnitude of that power of combination.
A significant issue for 19th-century chemists was explaining and organizing valence. The focus of the majority of the work was on developing empirical guidelines for figuring out the valences of the elements because there was no good hypothesis explaining their origin. Characteristic valences for the elements were calculated based on how many hydrogen atoms each one of their atoms might mix with.
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What are the 4 representations of a function?.
Algebraically, verbally, visually, technically (using a table or table of data), graphically (using a graphical representation or continuous graph), and graphically (using a page summary) (using a mathematical model).
What sort of purpose does chemistry serve?Work is any form of energy transmission that can be explained by a change in the system's macroscopic physical parameters. For instance, energy can be used to increase a system's volume in response to external pressure.
What all chemical state roles are there?Examples of condition numbers or state functions are initial energy, enthalpy, or entropy because they quantitatively characterize an equilibrium point of a thermodynamic system, independent of how the scheme got there.
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a 2mol sample of f2(g) reacts with excess naoh(aq) according to the equation above. if the reaction is repeated with excess naoh(aq) but with 1 mol of f2(g), which of the following is correct? responses
When 1 mol of F₂₍g₎ react with excess of NaOH₍g₎, then the amount of OF₂₍g₎ produced is halved.
What is NaOH?NaOH(sodium hydroxide) is very corrosive. It is generally used as a solid or a 50% solution. It is used in bar soaps and detergents.
Let us assume a balanced reaction that occurs when F₂ with NaOH 2F₂₍g₎ + 2NaOH₍aq₎ ⇒ OF₂₍g₎ + 2NaF₍g₎ + H₂O₍l₎
Moles of OF₂ and NaF obtained from 2moles of F₂, using molar ratios derived from the balanced chemical reaction
2mol F₂ × 1mol OF₂ ÷ 2mol F₂ = 1mol OF₂
2mol F₂ × 2mol NaF ÷ 2mol F₂ = 2mol NaF
Now, let's compare with moles of OF₂ and NaF obtained from 1 mol of F₂, again using the same molar ratios derived from the balanced chemical equation.
1mol F₂ × 1mol OF₂ ÷ 2 mol F₂ = 0.5 mol OF₂
1mol F₂ × 2mol NaF ÷ 2 mol F₂ = 1mol NaF
Since, we have half the amount of F₂, we obtain half the amount of the products, then the only right option is that the amount of OF₂₍g₎ produced is halved.
When 1 mol F₂ reacts with excess of NaOH, the amount of OF₂ produced is halved.
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What are the advantages of I bonds?.
I bonds' primary advantage is that they shield your money's purchasing value from inflation. The amount that a dollar can buy decreases as prices rise throughout the economy. Does inflation remain high
what is An economy is exactly ?An economy is a system of related production and consumption activities that ultimately determine how resources are divided within a society. The entirety of the goods and services produced and consumed satisfies the needs of those who live and work there.
Exactly why is the economy important?Most of the following important life situations include economics: how policy is decided by the government. purchasing real estate prospects and monitoring the situation of the home market. being able to decide on a budget with knowledge
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How long is a TABC license valid in Texas?.
TABC declared your seller training certification will be valid for two years from the date of issue.
The Texas Alcoholic Beverage Commission, or TABC, is a state agency in Texas that regulates, inspects, and taxes the production, sale, and consumption of alcoholic beverages in the state. The agency was established in 1935 and is headquartered in Austin. TABC certification provides you with the knowledge and skills you need to avoid the most common alcohol service violations, as well as peace of mind for employers, knowing they are helping to keep Texans safe.
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determine whether each change represents oxidation or reduction. you are currently in a sorting module. turn off browse mode or quick nav, tab to items, space or enter to pick up, tab to move, space or enter to drop. oxidation reduction
The change represents oxidation or reduction are :
CH₃CH₂OH to CH₃CH₃ = reductionCu to Cu²⁺ = oxidation NO₃⁻ to NO₂⁻ = reduction2Ag⁺ to 2Ag = reductionFe³⁺ to Fe²⁺ = reductionC₆H₁₂O₆ to CO₂ = oxidationThe removal of hydrogen is oxidation and increases in oxidation number is called as the oxidation reaction. the oxidations are given as :
Cu to Cu²⁺ = oxidationC₆H₁₂O₆ to CO₂ = oxidationThe removal of oxygen is called as reduction and the decrease in oxidation number is called as the reduction. the reductions are given as follows :
CH₃CH₂OH to CH₃CH₃ = reductionNO₃⁻ to NO₂⁻ = reduction2Ag⁺ to 2Ag = reductionFe³⁺ to Fe²⁺ = reductionTo learn more about oxidation or reduction here
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A mixture of nitrogen, oxygen, fluorine, and neon are in a container which has a tiny, tiny pinhole leak. Which element leaks the slowest from the container?.
A mixture of nitrogen, oxygen, fluorine and neon are in a container which has a tiny, tiny pinhole leak. The slowest element to leave the container is fluorine.
Gas output is expressed as:
Rate ∝ 1 / √M
rate of effusion is inversely proportional to the square root of the molecular weight.
molecular weight of nitrogen = 14amu
molecular weight of oxygen = 16 amu
Molecular weight of fluorine = 19amu
The rate of effusion with increasing molecular weight. Fluorine is therefore the element that escapes the slowest from the container. There is a mixture of nitrogen, oxygen, fluorine and neon inside the container with a very small leak. elements fluorine are the slowest to leak out of the container
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predict the stronger acid in each pair: part a hno3hno3 hno2hno2 part b h2sh2s h2oh2o
The more potent acid in each pair is HNO3. nitric acid totally dissociates in its aqueous solution.
What purposes do nitric acids serve?Ammonium nitrate, a crucial component of fertilizers, is created using nitric acid. Additionally, it is used to oxidize metals and to make explosives like trinitrotoluene (TNT) and nitroglycerin.
How is nitric acid produced?Nitric acid is created when water and nitrogen dioxide (NO2) react. Normally, the oxygen in the air reoxidizes the nitric oxide created by the process to create more nitrogen dioxide. Making almost pure nitric acid is possible by mixing sulfuric acid with a nitrate salt and heating the mixture in an oil bath.
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what mass of cu(s) is electroplated by running 11.0 a of current through a cu2 (aq) solution for 4.00 h ?
The mass of copper that is electroplated by running 11.0 A of current is calculated to be 52.11 g
The reaction for electroplating, in this case, can be given as;
[tex]Cu^{2+} + 2e^{-} --- > Cu[/tex]
As the current, I = 11 A and the time given is 4 hours, we first convert the time into seconds as follows;
t = 4 hours = 4 × 60 × 60 = 14400 seconds
We know that, F = Faraday constant = 96485.33 C/mol and
Molar mass of copper = 63.546 g/mol
Now we determine the charge by using the following formula;
Q = I × t
Q = 11 × 14400
Q = 158,400 C
Moles of electrons can be calculated as follows;
Q/F = 158400 ÷ 96485.33 = 1.64 moles
Now moles of copper can be calculated as follows;
1/2 × Q/F = 1/2 × 1.64 = 0.82 moles
Now the mass of copper can be determined as follows;
Moles × Molar mass of copper = 0.82 × 63.546
Mass of copper = 52.11 g
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When performing a subcutaneous injection the needle tip is positioned?.
When performing a subcutaneous injection the needle tip is positioned at an angle of 45- to 90-degree.
What is Subcutaneous injection?This is referred to as a type of injection which is used to administer medications or drugs into the body through the fatty tissues which are present beneath the skin so as to ensure that the adequate treatment oif the diseased individual is achieved.
The angle is based on the amount of subcutaneous tissue present and they have an inverse relationship such that shorter needles are positioned at a 90-degree angle.
On the other hand, longer needles are positioned at a 45-degree angle which is therefore the reason why 45- to 90-degree was chosen as the correct positioning for the needle tip of a subcutaneous injection.
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2 al(s) 3 br2(l) ----> 2 albr3(s) suppose the actual yield of the reaction is 42.0 grams of albr3 and the percent yield is 75%. what is the theoretical yield?
By multiplying the theoretical yield, or the amount that the process should theoretically produce, by 100.
What do you mean reaction?Resistance or resistance to a force, impact, or movement is a reactionary act, process, or occurrence. especially: a reaction to the a particular treatment, condition, or stimulus; inclination toward a past but typically antiquated political or social system or policy.
What is meaning of reaction in chemistry?One or more chemicals, also referred to as reactants, are transformed into one or more other substances, often referred to as products, in a chemical reaction. Substances are built up of active compounds or chemical elements. Burning is one of the five basic types of chemical reactions, along with combining, breakdown, only one, double-replacement, and replacement.
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What happens on an atomic level when a reaction between two elements such as sodium and chlorine results in two oppositely charged ions?.
The sodium atom loses an electron to the chlorine atom. The sodium atom becomes positive ion. The chlorine atom then becomes the negative chloride ion.
On an atomic level when the reaction takes place between two elements such as sodium and the chlorine result in two oppositely charged ions is they combine to form the an ionic compound, sodium loses its one electron to chlorine so chlorine gains the one electron.
A white, crystal-like ionic compound called the sodium chloride (NaCl) is used to flavor the food.
It is composed of a chloride anion (Cl-) and a sodium cation (Na+).
Due to the fact that it is made up of two substances with distinct electronegativities, it is categorized as an ionic compound.
It forms a chloride ion and forms the ionic compound sodium chloride.
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what mass of oxygen is needed to react with 1.39 gal of methanol according to the balanced equation below? (1.00 gal
The mass of oxygen is needed to react with 1.39 gal of methanol is 6266.4g
What is mole in chemical reaction?The mole can be used to quantify the amounts involved in chemical processes as well as to identify the simplest formula of a molecule. The related idea of molarity is helpful for discussing reactions that occur in solutions. The amount of moles of a solute in a liter of solution is known as molarity (M).The quantity of stuff that has the same number of essential components as the number of atoms found in a pure sample of carbon weighing exactly 12 g is known as a mole. A mole is defined as the quantity of a substance that contains precisely 6.0221023 of the substance's elementary particles.Given:
methanol = 1.39 gal = 1.39 *3.79 =5.2681 L=5268.1 mL
density of methanol is 0.793 g/mL
weight of methanol = 0.793 * 5268.1 =4177.6 g
From the Balance Equation we know that 2 mole of methanol react with 3 mole of oxygen
since
mass of oxygen is needed to react = 4177.6/2 * 3 =6266.4g
complete Que :
What mass of oxygen is needed to react with 1.39 gal of methanol according to the balanced equation below? (1.00 gal - 3.79 L, and the density of methanol is 0.793 g/mL.) 2 CH2OH(1) + 3 02(g) 2 C02(%) + 4H2O
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