The mixture contains a concentration of monoprotic acetic acid of
(8.36 M). (0.0083592 mol/1000 mL = 8.36 M) = 0.258 M x 32.40 mL/1000 L.
What is an example of monoprotic acid?Monoprotic acids include benzoic acid (C6H5CO2H), acetic acid (CH3CO2H or HOAc), nitric acid (HNO3), and hydrochloric acid (HCl).
What strength of acid is monoprotic acid?H2SO4 and H3PO4 are examples of polyprotic acids that contain two or three hydrogen ions. Although it is alluring to believe that polyprotic acids are more powerful than monoprotic acids since they include several hydrogen ions, this is not the case.
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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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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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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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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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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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What happens to the chemistry of the seawater as more co2 is absorbed into the oceans?.
Answer:
As more CO2 is absorbed into the oceans, the chemistry of the seawater changes. The pH of the seawater decreases, making it more acidic. This can have a negative effect on marine life, as many species are sensitive to changes in pH. Additionally, the increased acidity can cause the dissolution of calcium carbonate, which is an important component of coral reefs and other marine habitats.
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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Partial bonding, for example, as part of a resonance hybrid, often results in structures with _____.
Answer:
fractional bond orders
Explanation:
because fractional bond orders
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 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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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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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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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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draw the lewis structure for the polyatomic hydronium anion. be sure to include all resonance structures that satisfy the octet rule.
The polyatomic hydronium cation's Lewis structure is H3O+.
The hydronium ion is denoted by the symbol H3O+, and it will have 8 valence electrons to comply with the octet rule.
the quantity of valence electrons is:
First H atom has one valence electron, whereas the second H atom has a similar amount of valence electrons. Third H atom has one more valence electron than O, which has six.
The plus sign indicates that one electron has been lost, and as oxygen is the most electronegative element, it is the center atom. Consequently, it possesses eight valence electrons. Here is an illustration of the Lewis structure:
[ H - O : - H ]⁺
|
H
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A chunk of dry ice, solid co2, disappears after sitting at room temperature for a while. There is no puddle of liquid. What happened?.
Answer:
When dry ice (solid carbon dioxide) is exposed to room temperature, it sublimates, meaning it changes directly from a solid to a gas. This process is known as sublimation and is why dry ice "disappears" when left at room temperature. As the dry ice sublimates, it releases carbon dioxide gas into the air.
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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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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write the balanced chemical equation for the reaction of the weak acid hcn with water. include the phase of each species. chemical equation:
The balanced chemical equation for the reaction of the weak acid HCN with water is HC ≡ N (aq) + H₂O(l) ⇌ N₃O⁺ + ⁻C ≡ N (aq)
What does the chemistry term "equation" mean?
Reaction equation are symbolic depictions of chemical reactions where the reactants and products are stated in relation to the following chemical formulae.
Equation and response are what?What is an equations and a chemical reaction? In a chemical change, bonds between molecules of the reagent are destroyed and new bonds between molecules of the product are established to create a new substance. A chemical formula is nothing more than a statement of fact that represents how reactants generate products.
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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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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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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 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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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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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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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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at a certain concentration of h2 and i2, the initial rate of reaction is 98.0 m / s. what would the initial rate of the reaction be if the concentration of h2 were doubled? be sure your answer has the correct number of significant digits
Learn the concentration and beginning rate in order to determine the correct number of significant digits. The starting rate of reaction is 98.0 m/s at a specific concentration of h2 and i2.
What, using an example, is concentration?
1) Percent Concentration:
The amount of solute that completely dissolves in 100 g of solvent. We know that there are 20 g of solute in 100 g of solution if the solution's concentration is 20 percent. Example: The solution is made by combining 10 g of salt with 70 g of water. Find the solution's concentration using mass percent.
What would you say about concentration?
The amount of solute contained in a specific amount of solution is the substance's concentration. Typically, concentrations are described in terms of molarity, which is the number of
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after 21 days, a radioactive substance has decayed to 30.5% of its original amount. after an additional 51 days, what percent of its original amount will it have decayed to
Use the half-life calculator to analyze radioactive decay the substance will have decayed after the time the half-life has elapsed.
Radionuclides or radioactive substances are a class of chemical compounds where the nucleus of the atom is risky. They obtain balance via changes in the nucleus's spontaneous fission, emission of alpha debris, or conversion of neutrons to protons or the reverse.
Radon is a radioactive gasoline that has no color, odor, or flavor. Radon comes from the decay of uranium, which is a radioactive detail found naturally within the Earth's crust. Over billions of years, uranium decays into radium, and finally into radon.
Radioactive sources are used to observe dwelling organisms, diagnose and deal with diseases, sterilize clinical units and food, produce energy for heat and electric electricity, and to screen diverse steps in all types of business methods.
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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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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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the procedures instructs a student to measure 7.55 ml of solution 1. the student measures 11.89 ml of solution 1. what is the percent (by volume) of extra liquid measured by the student?
The procedures tells a student to measure 7.55 ml of solution 1 but the student measures 11.89 ml of solution 1. The percent by volume of extra liquid measure by the student added is 36.50%.
The percent by volume for any solution is calculated as%(v/v)=(volume of solute/volume of solution)×100
In the given problem, the volume of solution is 11.89 ml and the volume of the solute is
volume of solute=(11.89-7.55)ml
volume of solute=4.34ml
We cannot consider the volume used to measure by procedure because the total volume is increased by extra addition of the solute. Plug all values in the formula
%(v/v)=(4.34 ml/11.89 ml)×100
%(v/v)=0.36501×100
%(v/v)=36.501%
%(v/v)=36.50%
Therefore, the concentration of a liquid measured by the student is 36.50 ml.
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