The nickel level in a soil sample was determined using AAS. A 3.0 g sample was dissolved in acid and then diluted to a total volume of 100.0 mL. The absorbance of this solution determined at a wavelength of 232 nm, was found to be 0.3. Several standard solutions were tested under the same conditions and a calibration curve shown below was obtained. Calculate the mass of nickel in mg. 0.9 y = 0.0699x +0.015 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 ........ 6 8 10 12 14 [Ni], ppm 00 2. Absorbance

Q: Question 15 Coprecipitation that involves foreign particles? O Surface adsorption O Inclusion…

A: As per the company guidelines, we are authorised to solve only one question at a time.  Please post…

Q: Q28 Q30

A: We have to calculate the molar solubility of CaF2 in 0.25M solution of NaF. Ksp of CaF2 = 4×10-11 We…

Q: 13. Suppose the reaction: A + 2B AB2 occurs by the following mechanism: Step 1 A + B → AB slow Step…

A: Given reaction mechanism for the reaction A + 2B → AB2:  Step 1  A + B → AB    slow Step 2  AB + B →…

Q: Q3. Write the equations of the preparation of tribromoethane from ethane. Name the type of the…

A: Answer:- This question answered by using the simple concept of preparation of alkyl halide from…

Q: Analysis: 1. Reconcile your prediction with your observations. Write a definition for limiting and…

A: For the given HCl and sodium bicarbonate experiment, we have to answer the following questions: 1.…

Q: Question 13: In test tube 5, what evidence did you observe for disturbance in chemical equilibrium?…

A: The given problem is concerned with the following equilibrium: Fe3++SCN-↔[Fe(SCN)]2+…

Q: This reaction, 2 NH3(g) N₂(g) + 3 H₂(g), is an exothermic reaction that is at equilibrium in a 20.00…

A: Le chatelier's principle=>According to this principle when a change is made on equilibrium in the…

Q: OEt (3) ? NaOEt, ELOH

A:

Q: 1. The structure of compound A is shown below. он NH2 (a) Redraw the above structure in the form of…

A: Given: Structure of the compound To find: Expanded and condensed structure of the formula Solution:…

Q: 11. If reaction A has an activation energy of 250 kJ and reaction B has an activation energy of 100…

A:

Q: Br₂ FeBr3

A: Requirement from question: Two chemical reactions are needed products.

Q: Q10. A runner runs 4875 ft in 6.85 minutes. What is the runner's average speed in miles per hour?…

A: 10) Given, Distance a runner runs = 4875 ft  Time taken = 6.85 min Runners average speed = ? mi/hr…

Q: (2) NaOEt, ELOH

A:

Q: Which of the following description(s) are improperly used related to the process of filtration?…

A: Since you have asked multiple question, we will solve the first question for you.If you want any…

Q: 12. If the activation energy in the forward direction of an elementary step is 52 kJ and the…

A: A reversible reaction can be represented as follows: A↔B Here, A to B is the forward step B to A is…

Q: Determine the number of primary, secondary, tertiary and quaternary carbon atom that can be found in…

A: Primary carbon atom is that which is directly linked to 1 carbon atom only. Secondary carbon atom is…

Q: The following DATA for determination of calcium and magnesium in water by titration with EDTA. USE…

A: Given that: Total volume of solution containing Ca2+ and Mg2+ = 10.00 mL For EBT indicator, volume…

Q: Circle the best answer symbol to complete the sentence or question answer below: Use the following…

A: The Bohr model shows that the electrons in an atom travel in circular orbits around the nucleus.…

Q: 6) 7) 8) NH3 + H₂O + — H₂SO4 + 12 → N₂16 + SO3 →→ H2SO4 NH4OH → H₂ Type of reaction: Type of…

A:

Q: Freezing Point of pure TBA (experimentally determined) = 22.90 °C. 8.09 (C)(kg solvent) mol solute…

A: #(b): Here the solvent is TBA and the solute is the unknown substance.  Freezing point of pure TBA =…

Q: Q1 & Q2

A: The given structure is the molecular model of 2, 3-dimethylcyclohexa-1, 3-diene. The given compound,…

Q: How many grams of ferrous sulfate is needed to prepare 250-mL of 2.3 x 10-2 M of Fe2+ solution? O…

A:

Q: Use the following figure to answer the following questions? Q1) Which letters represent the…

A: Given diagram is : (1). Which letters represent the wavelength = ? (2). Which letters represent the…

Q: liquid (C) Y. Which one of the following staternents iS correct abont Avogadro's law and its…

A: Answer  Q=7  Which of the following  statement is correct about Avogadro…

Q: 14. A possible mechanism for the reaction, 2A + B C + D, is: (1) A + A 2 A2 fast, equilibrium (2) A2…

A: A2 + A →A3 is the slow step.

Q: -ダーー OH OH d. く→ mec-eney е. よ…球- MRC- sep

A:

Q: energy a) UV < IR < Vis b) Vis < IR < UV c) IR < Vis 4. A substance available in a pure form or…

A: Here I am answering question 4 and 5 as you have asked.4) a substance available in a pure form or…

Q: PRE-LAB QUESTIONS 1. A student dissolves 2.006 g of FeSO4-7 H₂O in 40 mL of sulfuric acid and then…

A: #2(a): Mass of FeSO4.7H2O standard taken = 2.047 g  Molar mass of FeSO4.7H2O = 55.845 + 32.065 +…

Q: The elements of Period 3 of the P.T are: sodium, magnesium, aluminium, silicon, phosphorus, sulphur,…

A: I explained both of the parts using MgO

Q: please answer Q5

A: The relation used to represent the elevation in boiling point is shown below. The relation used to…

Q: 6. Calculate the pH value when 10.0mL of 1.0M NaOH is added to the solution in question 5. (pH…

A: Answer-6Buffer solution is a type of solution that resists the change in its pH on adding small…

Q: 15. At 300 K, the following reaction is found to obey the rate law: Rate = k[NOCI]?: 2NOCI 2NO + CI,…

A: The reaction taking place is given as, =&gt; 2 NOCl -------&gt; 2 NO + Cl2  Given: Rate = K [NOCl]2…

Q: (d) Draw the structure of the expected product when monosaccharide C undergo mutarotation upon…

A:

Q: 1- Calculate the atomic packing factor of a crystal of cesium chloride KCl that crystallizes in a…

A:

Q: Hint:[ (molar mass of H-1, N-14g/mol), (R-0.0821 L.atm/K.mol), (The specific heat of water is…

A: Chemical kinetics can be defined as the branch of chemistry that deals with rates of chemical…

Q: The initial concentration of chlorous acid is 0.100 M. What is the equilibrium concentration of…

A: Given equilibrium reaction is  HClO2(aq) + H2O(l) ⇔ H3O+(aq) + ClO2-(aq)  Equilibrium constant (Kc)…

Q: If you will measure 90µl of liquid, what pipet calibration should you use appropriately? O 10µl -…

A: A pipette is laboratory glassware used for the accurate measurement of the volume of a liquid.

Q: Help with Q2 and Q3

A: Hello. Since your question has multiple parts, we will solve the first question for you. If you want…

Q: QUESTION 4 A 1.50-g sample of Na2SxO6 contains 6.68 x1021 sodium ions. Determine the value of x.…

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.