To neutralize 23.5 mL of a 0.145 M barium hydroxide solution, 23.9 mL of a 0.284 M hydrochloric acid solution is needed.
What does barium hydroxide serve?
Barium hydroxide is used to titrate weak acids, especially organic acids, in analytical chemistry. In contrast to the alkali hydroxides, barium carbonate creates clear, carbonate-free aqueous solutions because it is insoluble in water.
Acidity of barium hydroxide
When heated to 800 °C, barium hydroxide turns into barium oxide. Barium carbonate is produced when carbon dioxide reacts with it. Its strong base causes its extremely alkaline aqueous solution to go through neutralization reactions with acids.
Briefing:
The equation is given as:
Ba(OH)₂ + 2HCl ------> BaCl₂ + 2H₂O
from the equation it is clear that :
1mole of Ba(OH)₂ = 1 mole of HCl
number of moles of Ba(OH)₂ = volume × Molarity
= 0.0235 × 0.145
= 0.0034 mol
Therefore, number of moles of HCl = 2× 0.0034 mol = 0.0068 mol
volue of HCl = moles / Molarity
= 0.0068 / 0.284
= 0.0239 L = 23.9 mL
Thus, The volume of a 0.284 M hydrochloric acid solution is required to neutralize 23.5 mL of a 0.145 M barium hydroxide solution is 23.9 mL.
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write the balanced equation for the yeast using glucose to produce energy, ethanol and carbon dioxide.
the balanced equation for the yeast using glucose to produce energy, ethanol and carbon dioxide.
C12H22O11+H2O →4C2H5OH+4CO2
The production of medicines, polymers, lacquers, polishes, plasticizers, and cosmetics all need ethanol. In medicine, ethanol is employed as a topical anti-infective and as an antidote for methanol or ethylene glycol overdose. The toxicity of ethanol is rather low. To ensure microbiological stability when used as the only preservative in beverages, minimum concentrations of 18 to 21% by volume are needed. The majority of the alcohol you consume is broken down by your liver so it may be eliminated from your system. As a result, chemicals that are even more dangerous than alcohol are produced. These compounds have the potential to harm liver cells and result in significant liver conditions. 4 out of 5 liver disease deaths are related to alcohol.
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a certain substance has a heat of vaporization of 26.64 kj/mol.26.64 kj/mol. at what kelvin temperature will the vapor pressure be 8.008.00 times higher than it was at 287 k?
At 457.3 K temperature, the vapour pressure will be higher, for the given substance and its heat of vapourization.
What is Vapour pressure?The pressure that a vapour exerts on its condensed phases in a closed system when they are in thermodynamic equilibrium with one another at a specific temperature is known as vapour pressure. A liquid's evaporation rate can be determined by looking at the equilibrium vapour pressure.
Calculation:
The Clausius-Clapeyron equation is as follows:
ln (P2/P1) = ∆Hvap/R * (1/T1 - 1/T2)
ln (8.008) = (26.64 * 10³J/mol) / (8.314J/mol/K) * {(1/287K) - (1/T2) }
2 = (3.2 * 10³/K) * {(T2 - 287K)/ (287T2 * K)
0.000625/K * 287T2 * K = T2 - 287K
179.375K = T2 -287K
T2 = 457.3K.
Hence, at 457.3 K temperature, the vapour pressure will be higher.
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what is the abbreviated nomenclature for octadecanoic acid with two double bonds (don't worry about the designation of where those bonds occur)? 18:2 o 16:1 o 14:2 o 18:1 o 18:0
The abbreviation of octadecenoic acid with two double bonds is 18:2.
Nomenclature
Nomenclature is a system of naming objects within a certain profession or field. For instance, in biology, we have learned about binomial nomenclature. Binomial nomenclature alludes to the practice of designating living things by two names, such as referring to people as Homo sapiens.
A system of names and terminology used in a specific community or field of study is also referred to as nomenclature. The terminology that is used in sculpting is one example, a group of names or phrases. Naming of the chemical compounds or living organisms is done on the basis of nomenclature.
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peleaste help me :(
The increase in the ocean's average water temperature during mid months of the year may be associated with the summer season and therefore those cities should be located in the northern hemisphere.
Why does temperature vary in the Hemispheres?Temperature varies in the Hemispheres due to the amount of solar radiation received by the earth's surface, which is higher during mid-months (i.e. June, July and August) in the northern hemisphere.
Therefore, with this data, we can see that temperature varies in the hemispheres according to the month which is associated with the solar radiation received in these months.
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The room temperature BCC single-phase solid solution of carbon in iron is known as:
A. Austenite B. Ferrite C. Cementite D. Pearlite
B
The room temperature BCC single-phase solid solution of carbon in iron is known as: B. Ferrite
ferrite is a ceramic-like substance having magnetic characteristics that may be used in many different kinds of electrical equipment. Ferrite are polycrystalline, or made up of many tiny crystals, and are hard, brittle, iron-containing, often gray or black materials.
Temperature is a unit of measurement that may be represented on a variety of scales, including Fahrenheit and Celsius. Temperature shows the direction of the spontaneous movement of heat energy, i.e., from a hotter body (one with a higher temperature) to a colder body (one at a lower temperature).
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in a titration experiment, h2o2(aq) reacts with aqueous mno4-(aq) as represented by the equation above. the dark purple kmno4 solution is added from a buret to a colorless, acidified solution of h2o2(aq) in an erlenmeyer flask. (note: at the end point of the titration, the solution is a pale pink color.) at a certain time during the titration, the rate of appearance of o2(g) was 1.0 x 10-3 mol/(l⋅s). what was the rate of disappearance of mno4- at the same time?
MnO4 is disappearance at a rate of 4.0 x 10-4 mol/L at the same period.
An experiment involving titration requires what?You will need a calibrated burette, a burette stand, numerous beakers or Erlenmeyer flasks, a measured amount of your analyte, and a significant amount of your titrant to perform a titration. Start by adding a little amount of color indicator to the analyte in your beaker.
What is a titration experiment's conclusion?With the use of an indicator, the 'end point' of the titration is found when the color of the solution changes as a result of neutralization. It is feasible to link the concentration of the acid to the concentration of the base by calculating the volume of titrant necessary to achieve the "end point."
40 cm^3 diluted to 250 cm^3 means the dilution ratio of 250/40 = 6.25 times. Hence, the NaOH concentration is reduced by 1/6.25 = 0.16 times.
20 cm^3 is 0.02 dm^3.
That much of 0.05 M sulfuric acid contains 0.02 * 0.05 = 0.001 moles of H2SO4.
It reacts with NaOH at 1:2 molar ratio, which means 0.002 moles of NaOH were titrated.
That amount is found in 25 cm^3 = 0.025 dm^3 of the diluted solution, which yields its concentration to be 0.002 / 0.025 = 0.08 M.
Multiplying that result by dilution ratio gives 6.25 * 0.08 M = 0.5 M as the original concentration.
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why is potassium dihydrogen arsenate a duller color than potassium nitrate? potassium dihydrogen arsenate has a more stable excited state, so the emitted light is dimmer. potassium dihydrogen arsenate is heavier, so it does not excite as intensely. potassium dihydrogen arsenate also contains arsenic, which is a dull blue color. potassium dihydrogen arsenate is often contaminated with sodium, which dulls the color of light emitted.
Potassium dihydrogen arsenate has a more stable excited state than potassium nitrate, so the emitted light is dimmer.
Potassium nitrate (KNO3) is an ionic white crystalline salt made up of potassium ions and nitrate ions. It is also known as saltpeter or nitre. Manufacturing fertilizers, pesticides, glass, fireworks, explosives, and rocket fuel are among the uses of potassium nitrate. When added to meat, it triggers a reaction between the myoglobin and hemoglobin in the blood, giving the meat its red color. It is also used as a food preservative. Additionally, some toothpastes use it as an additive to lessen tooth sensitivity. When it comes to human consumption, potassium nitrate use is strictly regulated because it is toxic at high doses.
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calculate the following quantities for mixing 5 mol of h2 with 3 mol of o2 at 300 k and 1 atm under conditions where no chemical reaction occurs, assuming ideal gases: change in gibbs free energy for the system, change in helmholtz free energy for the system, change in entropy for the system, and change in chemical potential for h2. change in enthalpy for h2. change in energy for h2. is the process spontaneous? why?
The energy change that takes place as reactants become products is known as the standard Gibbs free energy change (Go). If Gorxn is negative and the reaction is exergonic, the products are more stable than the reactants.
According to the Gibbs phase rule, the number of degrees of freedom is given by the equation if the equilibrium in a heterogeneous system is not influenced by gravity or by electrical and magnetic forces. F = C-P + 2, where C is the total number of chemical components and P is the total number of phases.
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Consider heptane, a linear compound composed of 7 carbons and 16 hydrogens. In this experiment, would you expect this compound to have a small or large retention factor in this experiment?.
The compound have large retention factor in the experiment.
Definition of retention factor and its formula
Retention factor is one of the useful chromatographic descriptor since it is dimensionless and independent of the flow rate and column dimensions of mobile phases. The formula for retention time is given as follows,
k = tR – toto.
The retention factor may be affected by the temperature, and affected by the composition of the solvent, when the FM are liquid.
Heptane is a derivative of the distillation of oil, Heptane is a chemical compound that is made up of seven carbons, that is why it begins with the prefix "hept".
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a 3.50 gram sample of ch4 is burned in a calorimeter. the calorimeter is filled with 35.0 grams of water. the temperature of a calorimeter increases from 25.0°c to 30.0°c. calculate the energy lost or gained by the reaction.
The energy that an object gains or loses is related by the equation (Q = m•C•T). since a positive value means that heat was added to the system. The heat can be gained or lost without change in temperature.
How to solve?by the equation (Q = m•C•T)
m=3.50g
C=35
T=+5°c
Q=3.50*35*(+5oC)=612.5.
What is the equation for energy acquired or lost?An object's heat uptake or loss and the resulting temperature variations are related by the description above and the following equation (Q = m•C•T). We now know that heat can occasionally be gained or lost without a corresponding change in temperature. When the substance is changing states, this is what happens.
What is heat amount and what is its unit?the amount of heat needed to raise a substance's temperature by one degree Celsius or one kelvin per unit mass.It has the symbol c. joule per kg kelvin is the SI unit. In the SI system, all types of energy are measured in (J/kg K)joules. Because heat is a form of energy, the SI unit for heat is also joules (J), and it is defined as the quantity of energy required to increase the temperature of a given mass by one degree. This is significant because heat is a form of energy.
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based on what you wrote in the table in part a, what effect do lone pairs have on the bond angle? why do you think this happens?
Because they are more in close proximity to the core atom's nucleus than lone pairs are, lone pairs reject other lone pairs more strongly than bonding pairs do effect the bond angle.
When a single pair of electrons at the central atom begins to resist the bound pair of electrons, the bond angle decreases and the bonds are slightly shifted inward. It moves existing atoms closer together and modifies their geometry. It's equivalent to include an atom. When there is an increase in back bonding, the bond angle rises. Because the lone pair electrons of the two atoms reject one another, adjacent atoms in a molecule that have lone pair electrons will not be kept together in their bond as securely.
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What is the empirical formula of a compound that contains 29% na, 41% s, and 30% o by mass?
Na2so3 is the empirical formula for a compound that, by mass, contains 29% NA, 41% S, and 30%.
What is empirical formula of a compound?The empirical formula of a chemical compound in chemistry is the simplest whole number ratio of atoms in a compound. Two simple examples of this concept are the empirical formulas of sulfur monoxide, SO, and disulfur dioxide, S2O2. An empirical formula is a compound's chemical formula that only specifies the ratios of the elements it contains and not the precise number or arrangement of atoms. This would be the compound's element with the lowest whole number ratio.
How can you determine a compound's empirical formula?1. To solve an empirical formula problem, you must first determine the mass percentage of the constituent constituents.
2. Next, convert the percentage to grams.
3. Subtract each mass from its corresponding molar mass.
4. Select the moles answer that is the smallest and divide all numbers by that.
Briefing:1. Change every percentage to grams.
29% Na = 0.29g
41% S = 0.41 g S
30% O = 0.30 g O
2. Change every amount to moles.
0.29 g Na = 0.01261… moles Na
0.41 g S = 0.01278… moles S
0.30 g O = 0.01875 moles O
3. Divide each mole by the smallest one, then roughly
0.01261 mol Na /0.01261 approximately 1
0.001278 mol S/0.01261 approximately 1(rounded from 1.01348…)
0.01875 mol O/0.01261 approximately 1.5(rounded from 1.486915
4. Since one of the elements was rounded to a non-whole integer, we must multiply each element by 2 to obtain whole numbers.
Na: 1 * 2 = 2
S: 1 * 2 = 2
O: 1.5 * 2 = 3
5. Based on the numbers above, create the equation using subscripts for each element.
6. sodium thiosulfate (Na2S2O3)
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a solution contains one or more of the following ions: ag ag , ca2 ca2 , and cu2 cu2 . when you add sodium chloride to the solution, no precipitate forms. when you add sodium sulfate to the solution, a white precipitate forms. you filter off the precipitate and add sodium carbonate to the remaining solution, producing another precipitate.
SO₄⁻² (aq) + Ca⁺₂(aq) → CaSO₄(s)
CO₃⁻²(aq) + Cu⁺²(aq) → CuCO₃(s).
when you add sodium chloride to the solution, no precipitate forms. when you add sodium sulfate to the solution, a white precipitate forms. you filter off the precipitate and add sodium carbonate to the remaining solution, producing another precipitate.
When sodium chloride (NaCl) is added to the solution, sodium chloride dissociates and forms the ions Na+ and Cl-. The anion can be form salts with the other cations presented in the solution. According to the solubility table of the salts, AgCl is a nonsoluble salt, and so, it was expected to form a precipitate. Perhaps, the concentration was not higher enough to do this.
When sodium sulfate (Na2SO4) is added, sodium sulfate dissociates and forms Na+ and SO₄⁻², the sulfate ion can react with the other cations. According to the solubility table, the salt CaSO4 (Ca is from group 2) is nonsoluble, so it will be formed. The net ionic equation represents the ions in solution that reacts:
Na⁺(aq) + SO₄⁻² (aq) + Ca⁺₂(aq) → Na⁺(aq) + CaSO₄(s)
SO₄⁻² (aq) + Ca⁺₂(aq) → CaSO₄(s)
When sodium carbonate (Na2CO3) is added, it dissociates and forms Na+ and CO₃⁻². According to the solubility table, the salt CuCO₃ is nonsoluble and will form a precipitate:
Na⁺(aq) + CO₃⁻²(aq) + Cu⁺²(aq) → Na⁺(aq) + CuCO₃(s)
CO₃⁻²(aq) + Cu⁺²(aq) → CuCO₃(s)
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carbon dioxide is carried in three forms in the blood. ranking them from greatest to least amount carried, the sequence would be:
The three forms of carbon dioxide in the blood ranking them from greatest to least amount carried, the sequence would be bicarbonate ion, carbamino hemoglobin, and dissolved in plasma.
Most carbon dioxide (about 70%) is transported as bicarbonate ions in the plasma. An increase in carbon dioxide in the blood will cause a slight increase in H+ concentration (drop in pH).
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The hydronium ion, H3O+, is a ________.Check all that apply.very strong baseproton acceptorpolyatomic ionproton donorunique form of waterpolyatomic ionproton donor
The hydronium ion, H3O+, is a polyatomic ion. very strong base proton acceptor polyatomic ion proton donor unique form of water polyatomic ion proton donor.
A polyatomic ion, often called a molecular ion, is a collection of covalently bound atoms or a metal complex that can be thought of as acting as a single unit and has a net charge that is not zero. Depending on the definition, a polyatomic ion may or may not be referred to as a "molecule".
Protonated water, also referred to as the hydronium ion, can be found in all aqueous acidic solutions. The aqueous cation H3O+, a particular kind of oxonium ion created by protonating water, is known by the name hydronium ion. It is frequently thought of as the positive ion that forms when an Arrhenius acid dissolves in water because Arrhenius acid molecules in solution give a proton to the nearby water molecules.
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A pitching machine is used to pitch two balls. The speed of both balls is 94 km/hr. The mass of one ball is 5 grams, and the mass of the other ball is 50 grams. Since both balls are traveling at the same speed, which of the following is true? Responses The 5-gram ball has more kinetic energy than the 50-gram ball. The 5-gram ball has more kinetic energy than the 50-gram ball. The balls have the same kinetic energy.
A) The balls have the same kinetic energy.
B) The 50-gram ball has more kinetic energy than the 5-gram ball.
C)The 50-gram ball has more kinetic energy than the 5-gram ball.
D) Neither ball has any kinetic energy.
Answer: b
Explanation:
do the equilibrium concentrations of the reactants and products depend on their initial concentrations?
The value of Keq is unaffected by the initial concentrations, despite the fact that the equilibrium concentrations of the reactants and products are. No matter the initial concentrations, the equilibrium state will always be reached (same Keq).
The equilibrium constant of a chemical reaction depends only on temperature. The initial concentrations will change during the reaction and will, at the end, respect the equilibrium constant. The equilibrium constant does not imply specific concentrations, but only the relation between them. Therefore, for a reaction in equilibrium, shifting to the right will result in a decrease in one of the reactants if the concentration of one of the reactants, such as hydrogen or nitrogen, is increased. The temperature is constant when melting. This is due to the fact that heat energy is not used to increase temperature but rather is absorbed by the particles to dissipate forces between them.
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a net magnetic moment is associated with each atom in paramagnetic and ferromagnetic materials. explain why ferromagnetic materials can be permanently magnetized whereas paramagnetic ones cannot
Ferromagnetic materials can be permanently magnetized whereas paramagnetic ones cannot because in ferromagnetic material the electron spin is in the same direction whereas in the paramagnetic material the electrons spin is in all direction.
A net magnetic moment is associated with each of the atom in the paramagnetic and the ferromagnetic materials. the ferromagnetic is permanently magnetized as the in case of ferromagnetic material the electron spin is in same direction. and ferromagnetic material shows strong attractive or repulsive force when ferromagnetic material introduced to the permanent magnet.
In the case of paramagnetic material the electrons spin is in all the direction thats why paramagnetic material cannot be permanently magnetized.
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Which of the following is a paleoclimate proxy? O A Written temperature records from the summer of 1863 OB Measurements of fossilized tree rings from the Cretaceous period O c A database of satellite temperature data, from 1970 through present © D All of the above
Measurements of fossilized tree rings from the Cretaceous period is a paleoclimate proxy. -database of satellite temperature data,
An animal or plant from a previous geologic era that has been preserved in the Earth's crust as a fossil, remnant, impression, or trace. The main repository for knowledge regarding the evolution of life on Earth is the complex of information preserved in fossils found all across the world.
fossils of dinosaurs discovered in Alberta, Canada. Only a small percentage of extinct species have been preserved as fossils, and often only those with a sturdy skeleton are capable of doing so. A calcareous skeleton or shell is present in the majority of major groups of invertebrate creatures (e.g., corals, mollusks, brachiopods, bryozoans). Other types have silicon dioxide or calcium phosphate shells (both of which are found in the bones of vertebrates).
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what is the molar mass of a 4.80 g sample of gas exerting 0.800 atm of pressure at 295 k in a 7.00 l container?
The molar mass of a 4.80 g sample of gas exerting 0.800 atm of pressure at 295 k in a 7.00 l container is 253.969g/mol.
It is given that the mass of the sample is 4.8g and it exerts a pressure of 0.8atm at 295K in a 7L container. According to the ideal gas law,
PV =nRT
By rearranging this formula we get,
n = PV/RT
On plugging the values of P, V, R and T we get
n = 0.8x7/295
n = 5.6/295
n = 0.0189 moles
The moles of the gas are 0.0189. The molar mass can be computed by,
Molar mass = mass of the gas/moles of the gas
Molar mass = 4.8/0.0189
Molar mass = 253.968g/mol
Therefore, the molar mass of the gas is 253.969g/mol
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solid ammonium chloride, nh4cl, is formed by the reaction of gaseous ammonia, nh3, and hydrogen chloride, hcl. nh3(g) hcl(g)⟶nh4cl(s) a 4.98 g sample of nh3 gas and a 4.98 g sample of hcl gas are mixed in a 0.50 l flask at 25 ∘c. identify the limiting reagent. nh3 hcl nh4cl how many grams of nh4cl will be formed by this reaction? mass: g what is the pressure in atmospheres of the gas remaining in the flask? ignore the volume of solid nh4cl produced by the reaction.
The limiting reagent in this reaction is the hydrogen chloride (HCl).
What is reagent?
A reagent, also known as an analytical reagent, is a substance as well as compound that is added to a system in chemistry to bring about a chemical reaction or check to see if one occurs. Although the terms "reagent" and "reactant" are frequently used interchangeably, "reactant" refers to a substance that is consumed during a chemical reaction. Despite being a part of the reaction mechanism, solvents are not typically referred to as reactants. Catalysts are not reactants because they are not consumed by the reaction. The reactants in biochemistry are frequently referred to as substrates, particularly in relation to enzyme-catalyzed reactions.
The limiting reagent in this reaction is the hydrogen chloride (HCl). This is because it requires more moles of HCl than ammonia to produce ammonium chloride (NH4Cl). The number of moles of HCl is 0.0998, while the number of moles of ammonia is 0.0498, so HCl is the limiting reagent.
The amount of NH4Cl that will be formed will be 4.98 g, since this is the amount of the limiting reagent, HCl.
The pressure of the gas remaining in the flask will be unchanged, since no gas is consumed in the reaction, only solids. Therefore, the pressure will remain at 0.50 atmospheres.
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inthee2reaction,whatwasthepercentageof1-buteneproductformed?explain why the percentage of 1-butene formed was higher in the e2 reaction compared to the e1 reaction.
In the E2 reaction, the percentage of formation of 1- butene was 20.7%.
The E2 reaction is defined as the process that takes place in one-step, and the E1 reaction is defined as the two-step mechanism. The numbers are used to represent the kinetics of the reaction rather than the number of steps in the mechanism.
E2 is bimolecular (second-order) kinetics, whereas E1 is unimolecular (first-order) kinetics. The three key factors that affect E1 elimination reactions are the solvent type, the leaving group's shape, and the carbocation's stability.
Hence, the percentage of formation of 1- butene was 20.7% and the reason is explained above.
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What happened when force was applied to the ionic crystal? describe interactions between the ions within the crystal.
Similar ions repel one another and the crystal lattice breaks as a result of the powerful electrostatic interactions.
High melting points are found in ionic substances. Ionic chemicals are brittle and rigid. When an ionic chemical is dissolved in water, it separates into ions. Ionic compound solutions and melting forms of these substances carry electricity, while solid materials do not. The chemical formula of an ionic compound is metal + nonmetal or polyatomic ions.
Ionic networks, also known as lattices, are formed when these oppositely charged ions attract one another. Why this occurs is explained via electrostatics: Like charges repel while opposing charges attract. The result of many ions attracting one another is the formation of massive, organized crystal lattices where each ion is surrounded by ions with the opposing charge.
Hence, ionic bond species repel each other when reach too much closer.
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two coordination compounds that have the same ligands arranged differently in space around the central metal ion, but are not mirror images of one another, are called
Geometric isomers are coordination compounds that have two or more of the same atom kinds, numbers, and bond types.
Geometric isomers are two coordination compounds with identical ligands that are not mirror images of one another but are positioned differently in space around the central metal ion. Trans isomers have identical ligands across from each other, whereas isomers with identical ligands adjacent to each other are referred to as cis isomers.
The only compounds with geometric isomerism are square planar and octahedral. Tetrahedral compounds do not exhibit geometric isomerism since each Ligand is positioned in the same way around the centre metal atom or ion in space.
Hence, coordinating substances known as geometric isomers include two or more of the same atom types, numbers, and bond types.
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name the ions formed by these elements and classify them as anions or cations. a) selenium b) barium c) phosphorus
The selenium ion is represented as Se4+, Barium ion is represented as Ba2+ and Phosphorus occurs as phosphate ion i.e., PO43-.
The chemical species that contains a positive charge is known as cation while the chemical species consisting of a negative ion is known as anion.
Selenium is a metal, therefore is exist as a cation with Se4+ representation having +4 charge. Barium is a metal, thus it exist as a cation with Ba2+ representation having +2 charge while phosphorus always occurs as a phosphate ion i.e., PO43- which is an anion as phosphorus is a non-metal.
Therefore, the representation of the ions are given above.
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a wet cell is an electrochemical cell in which the electrolyte is a liquid. please select the best answer from the choices provided t f
A wet cell is an electrochemical cell in which the electrolyte is a liquid,the given statement is true.
What is electrochemical cell?A device known as an electrochemical cell has the ability to produce electrical energy from chemical processes taking place inside of it or utilize electrical energy from external sources to speed up chemical reactions inside of it. The energy in chemicals may be transformed into electrical energy or vice versa using these devices.
A galvanic cell or voltaic cell is an electrochemical device that uses spontaneous redox reactions to transform chemical energy into electrical energy. Example: The typical 1.5 volt cell used in consumer electronics is an illustration of a galvanic cell.
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Calculate the standard reaction entropy for the decomposition of 1 mol calcite to carbon dioxide gas and solid calcium oxide at 25°c.
A process employed entropy was 160.6 J/mol*K again for decomposition if 1 mol calcium calcite to dioxide and white precipitated oxide at 25 °C.
How do you define reaction in chemistry?One or more substances—known as reactants—are transformed into one or more other substances—known as products—in a chemical reaction. Substances are composed up of chemical components or chemical elements.
Explain type of rections?The five basic types of chemical processes are synthesis, breakdown, one, double replacement, and combustion. By analyzing both reactants and products, you can assign a reaction to one of these categories.
Briefing:CaCO3(s) → CaO (s) + CO2 (g)
ΔS° = (1 mol) [ΔS° for CaO (s)] + (1 mol) [ΔS° for CO2(g)] – (1 mol)[ΔS° for CaCO3(s)]
= (1 mol) (39.8 J/mol K) + (1 mol) (213.7 J/mol K) – (1 mol) (92.9 J/mol K)
= 160.6 J/K
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when considering whether a toxic compound will easily move through soil and enter the groundwater--which of the following properties must be identified?
We are considering whether a toxic compound will easily move through the soil and enter the groundwater. The property that must be identified is: D. Soil sorption coefficient (Kd).
What is Soil Sorption Coefficient (Kd)?Soil sorption (adsorption) coefficient, in short Kd, measures the amount of chemical substances absorbed into the soil per amount of water. To calculate the Kd value, we need to divide the concentration of the solid (mg/kg dry solid) by the concentration in the pore water (mg/L). Hence, the correct answer is D. Soil sorption coefficient (Kd).
The question seems incomplete. The complete query is as follows:
When considering whether a toxic compound will easily move through soil and enter the groundwater—which of the following properties must be identified?
a. Water-air ratio (Kw)
b. Bioconcentration factor (BCF)
c. Octanol-water coefficient (Kow)
d. Soil sorption coefficient (Kd)
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draw the lewis structure for the polyatomic phosphite anion. be sure to include all resonance structures that satisfy the octet rule.
The structure of the phosphite anion is a "T" shaped structure as it contains three oxygen atoms one with double bond with the phosphate atom.
Anion is a negatively charged ion that attracts the anode in electrolyte solution. The phosphite anion contains three oxygen atoms with one of them having double bond with the phosphate atom.
According to Lewis structure the phosphite anion would be a "T" shaped structure. As we know, Lewis structure gives us the idea of how many electrons are donated or shared in order to form a covalent bond.
Lewis structures, also known as Lewis dot formulas, Lewis dot structures, electron dot structures, or Lewis electron dot structures, are diagrams that show the bonding between atoms of a molecule, as well as the lone pairs of electrons that may exist in the molecule.
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Cameron used ounces of hydrochloric acid in one experiment. She used ounces of the acid in a second experiment. How much more acid did cameron use in the second experiment?.
Cameron used ounces of hydrochloric acid in one experiment. She used ounces of the acid in a second experiment. In second experiment, She used 2 ounces of the acid
Amount required is x = 3/8 Given: Cameron used 1 ounces of hydrochloric acid in one experiment. She used 2 ounces of the acid in a second experiment.
To find: How much more acid did Cameron use in the second experiment?
Solution:In one experiment, Cameron used 1 ounces of hydrochloric acid i.e 13 = 1
In second experiment, She used 2 ounces of the acid. i.e. 21 = 1 17 Let x amount more she used then experiment 1 in experiment 2.
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