Plot a calibration graph of absorbance vs concentration of Ca2+ and determine the concentration of Ca2+ in the unknown tap and unknown bottle water samples.

Q: Titanium (Φ = 6.94 ×× 10–19 J) and silicon (Φ = 7.77 ×× 10–19 J) surfaces are irradiated with UV…

A: Titanium (Φ = 6.94 ×× 10–19 J)  Silicon (Φ = 7.77 ×× 10–19 J) λ = 243 nm = 243 x 10-9 m

Q: Use the picture below to answer the question. 2 s H 7 LI Be =288 2 11 12 Na Mg 19 20 K Ca Sc Ti 37…

A: We have been given a picture of periodic table of chemical elements.We have been asked that in given…

Q: Using the ΔHo for the reaction calculate the increase in temperature of the resultant salt solution…

A: Recall the given reaction as follows     HClaq + NaOHaq → NaClaq + H2Ol  , ∆Ho=-55.9 kJ/mol Here…

Q: (Na2SO4=142.05g/mol; Na2S-78.05g/mol, C=12.01 g/mol; CO=28.01g/mol) Sodium sulfide, Na₂S, is used in…

A: A limiting reagent is the one which finishes first in a reaction. The whole reaction depends on the…

Q: rovide the polymer showing 5 repeating units for the following alkene: CH2CH=CH2CH3

A: Given -> Monomer is CH3CH=CHCH3 When monomers are repeated polymer is formed .

Q: How many moles of Agl will be formed when 75.0 mL of 0.300 M AgNO, is completely reacted according…

A:

Q: can you help me with this and line it up exactly in the order i keep trying but its not being…

A: Given that -  Volume of the solution = 155 mL  Molarity = 0.762 M  And, molar mass of FeCl3 = 162.2…

Q: For the reaction I2(g) + Br2(g) = 21Br(g) K. = 280 at 150 °C. Suppose that 0.540 mol IBr in a 2.00-L…

A: Recall the given reaction,                              I2 g  +  Br2 g  ↔  2 IBr g…

Q: How many electrons are transferred in the following redox reaction? Zn + 2 AgNO3 2 Ag + Zn(NO3)2…

A: The reaction in which one species is oxidized and one species is reduced simultaneously, is called…

Q: Question 2 Briefly explain how the antioxidant activities of tocochromanol natural products can be…

A: Vitamin E consists of 4 tocotrienols (α,β,γ,δ) and 4 tocopherols. Tocotrienol are found in palm oil,…

Q: determine the molar solubility of AgI in pure water. Ksp (AgI) = 8.51 x 10^-17

A:

Q: 1. Aqueous copper (II) sulfate and 0.75 M sodium hydroxide react to form a precipitate of copper…

A: Dear student, Since you have asked multiple questions, we will solve the first question for you. If…

Q: b.

A: Iupac Nomenclature of compound.

Q: How many possible resonance structures can you have in total for the nitrite ion.

A: In nitrite ion you can draw two equivalent structure. Resonance structure is not a autual structure…

Q: Aluminum reacts with Cl₂ to form AICI3. If you have 0.712 mol of Al, what amount (mol) of Cl₂ is…

A: The unbalanced chemical equation is: Al + Cl2 → AlCl3  Amount of Al initially taken = 0.712 mol…

Q: Calculate the pressure difference that must be generated by OA. 1.47 x 103 Pa OB. 1.96 x 103 Pa OC.…

A:

Q: ). A sample of krypton gas at a pressure of 1.00 atm and a temperature of 24.3 °C, occupies a volume…

A:

Q: Complete the following table. Only consider the 'central' atom when filling in the steric # , # of…

A: Given Compounds: HCN H3O+ NH4+ To Complete the given table for the geometry and polarity of the…

Q: For each complex, give the number of d-electrons and circle whether you expect it to be a high spin…

A: This given transition metal complexes having octahedral , square planar structures can attain…

Q: pH of solution in flask 12.0 10.0 8.0 6.0 4.0 2.0 Indicator methyl orange methyl red A 25.0 mL…

A: Answer: Indicator is the chemical substance that indicates about the completion of titration by…

Q: 1H 11 10 2H 2h 3H 3 An IR spectrum, a 13C NMR spectrum, and a ¹H NMR spectrum were obtained for an…

A: We have give the structure of the unknown molecule from the given proton and carbon NMR spectrum and…

Q: (Na2SO4=142.05g/mol; Na2S-78.05g/mol, C=12.01g/mol; CO=28.01g/mol) Sodium sulfide, Na2S, is used in…

A: We will first convert the grams of reactants to moles. So that we can compare relative moles of…

Q: Hydrogen sulfide, H₂S, has the characteristic odor of rotten eggs. If a sample of H₂S gas at 2.75…

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Q: -ОН OH H,CrO4 PCC

A:

Q: why does toluene have a higher boiling point than isopropyl acetate? this question is in regards to…

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Q: which of the following species is amphoteric?

A:

Q: + H2O НО A + OH B + HBr

A:

Q: the equiliberium constant for the gas phase reaction see image with 2SO2 is Kwq = 2.80 x 10^-4 at…

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Q: 17 mol O2 10. What is the percentage yield of ammonia when 14.0 g of N2 gas reacts with 5.0 g of H₂…

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Q: the correct formula for ionic compound containing TI3+ and Te2- ions would be

A: Writing the name of ionic compound, charge of first ion is suffix of second ion and charge of second…

Q: identify the species that is oxidized and the species that is reduced  Zn + 2MnO2   ->    ZnO +…

A: The addition of electrons or decreases in the oxidation state is known as a reduction reaction and…

Q: A buffer solution contains 0.408 M C6H5NH3Cl and 0.202 M C6H5NH₂ (aniline). Determine the pH change…

A: Answer:- This question is answered by using the simple concept of calculation of pH change of a…

Q: Write a balanced chemical equation for the standard formation reaction of gaseous hydrogen bromide…

A: Given : HBr(g) formed

Q: Which of the following carbocations will rearrange? (Choose all that apply.)

A:

Q: D D The [Co(NH3)5H₂O]³+ ion has a maximum in its absorption spectrum at 500 nm. Calculate Ao in…

A: The answer is 238.4 kJ/mol. In this question, wavelength is given in nm, first convert it into SI…

Q: 1H 10 2H 2h 3H An IR spectrum, a 13C NMR spectrum, and a ¹H NMR spectrum were obtained for an…

A: 1H-nmr provides the information of hydrogen environment of the unknown compound. 13C-nmr provides…

Q: Provide the correct Lewis dot structure for the following atoms. (Consider each to be uncharged)…

A: To draw a lewis dot structure we need to know the valance electron number. we have shown the lewis…

Q: What volume in L of a 0.724 M Nal solution contains 0.405 mol of Nal?

A: Molarity (M) is a concentration term for a solution. The molarity of a given solution is defined as…

Q: Provide the IUPAC name for the condensed structural formula shown here. CH₁₂_0th-CH₂-C…

A: IUPAC nomenclature: The basic skeleton of iupac nomenclature is " Prefix + Parent carbon chain or…

Q: Which of the following complexes is "inert" in regards to ligand substitution reactions? Group of…

A: The number of d-electrons, configuration, size of the metal and charge of the metal decides the…

Q: 3. The end point is the point where equal masses of reactants combine */^~²) 2-) O False True

A: 3)The endpoint in a titration is defined as the point at which the indicator changes colour.  Note:…

Q: Calculate E, E, and AG for the following cell reaction: Mg(s) + Sn²+ (aq) = Mg²+ (aq) + Sn (s) where…

A:

Q: 1) Consider the following reaction: Mg(s) + 2HCl(aq) MgCl₂(aq) + H₂(g) The total pressure of gas…

A:

Q: Which of the following alkenes results in the most exothermic reaction when hydrogenated with H₂ and…

A: The hydrogenation reactions of alkenes are the exothermic reaction. i.e. The hydrogenation of…

Q: 1. Show the steps necessary to make 4-cyclohexyl-1-octene using a Wittig reaction. Start with…

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Q: Typically, the C=C bond is found at approximately 1500 cm³1, while the C-O bond is found at…

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Q: Which of the following is the least hazardous form of chromium? Group of answer choices chromium(VI)…

A: Oxidation state is defined as charge on central metal atom. In the given compound, it has been asked…

Q: 1. What is the charge on the phosphorus, P, in the following compound, HPO₂S? Input the value here.…

A: Charge on Phosphorus  Overall charge on compound.

Q: How would you find the initial [SCN-]  and the Equilibrium [FeSCN2+]?

A: The initial [SCN-] is already calculated which is the same as the [NaSCN].  Because each NaSCN…

Q: Silver oxide decomposes completely at temperatures in excess of 300 oC to produce metallic silver…

A:

Quantum Chemistry

Quantum chemistry deals with the properties of chemical systems and their reactions. The branch of chemistry which is more concerned with quantum chemistry is physical chemistry. It is a more sophisticated field of theoretical physics which is concerned towards the application of physical concepts towards various chemical aspects such as, formation of atoms, chemical structure descriptions, chemical bond strength, hybridization, conjugation etc. Quantum chemistry mainly studies the various states i.e., ground state, excited state, transition states of the individual atoms or molecules taking place during any chemical reaction. The laws of motion explained by various scientists, which are termed as “classical mechanics” were not acceptable in terms of electrons, protons, atoms, light etc. Thus, a new theory named “quantum mechanics” emerged to understand the basic framework of various atomic and subatomic particles.