An electron in a hydrogen atom relaxes to the n 4 level, emitting light of 7.4 x 1013 Hz. What is the value of n for the level in which the electron originated? 7 8 2 3 5

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A: Isotonic solution is one that has same osmolarity as that of other solution. It means when such two…

Q: Classify each of the following as a strong electrolyte or nonelectrolyte. Drag the appropriate items…

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Q: 2 eg. Na OH

A:

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A: Given DataConcentration of NaHA = 0.025Concentration of Na2A = 0.025Experimental value of pH =…

Q: given the molar mass of of compound A as 327.34g/mol and the mass being 0.016g. calculate the…

A: Given that, the molar mass of compound A as 327.34 g/mol. The mass of the compound A is m = 0.016 g.…

Q: The strength of weak solutions or liquid preparations is frequently expressed in terms of strength.

A:

Q: Calculating the pH at equivalence of a titration A chemist titrates 250.0 mL of a 0.5586M cyanic…

A: we have to calculate the pH at equivalence point

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A: Given,  The balanced reaction between HI and Ba(OH)2 in aqueous solution is:

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A: Given :- initial concentration of solution = 2.5 mol.dm-3 Initial volume =  25.0cm3  Final volume =…

Q: What is expected with freezing temperature of DCM if caffeine is dissolved in it?…

A: Effect of caffeine on freezing point of DCM.

Q: 7. Compute for the % mass or weight salt solution by mixing 622g of NaCl with 1.86 liters of H20.…

A:

Q: write a short note on, summary of introduction to pharmaceutical analysis?

A: Pharmaceutical analysis involves the series of processes for identification, determination,…

Q: 2. Determining the Acid Content of Vinegar Trials A В Volume of Vinegar used (ml) 25.00 diluted to…

A:

Q: 12) Calculate the K., of silver chromate if the chromate concentration was determined to be 6.54 x…

A:

Q: H. Application: Choose which test/s does the following structure of compounds will give positive…

A: There are many mechanisms in organic chemistry such as nucleophilic substitution, nucleophilic…

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A: Percent concentration by mass is the mass of solute divided by the total mass of the solution and…

Q: Can you please answer these two sub questions and show the step by step to the solution please and…

A: A) Given: density of solution = 1.1094 g/mL Molar mass of H2SO4 = 98.079 g/mol Mass percent of…

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A: Distillation is the process by which liquid mixtures are separated based on the difference in their…

Q: COLUMN A COLUMN B COLUMN C A. cuprous sulfate pentahydrate 1. KNO, a. base b. oxyacid c. binary…

A: Introduction In order to identify the name of any particular compound, one should have the knowledge…

Q: Analyse the proses of interstitial and substitutional solid solution. Use diagram to aid your…

A: Answer: Interstitial solid solutions form when the solute atom is small enough to enter into the…

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A: calculation: α=Kb​/c​where α=dissociationratio, Kb​=dissociationconstant, c=theconcentration Kb =…

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A: Interpretation: To explain the data of the graph and and spectrophotometric analysis of aspirin.

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Q: c). B (if basic).o

A: Reaction of Salt in Water, K2C2O4(aq.) + H2O(l)--->  2KOH(aq.) + H2C2O4(aq.)

Q: ОН | | OH НО ОН

A: Both molecules are chiral.having two chiral centre .

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A: Given, Concentration of stock solution ,M1=200×10-6M

Q: Part II. Determination Ka and Molar Mass of Unknown Monoprotic Acio

A: The unknown acid is monoprotic, also the base used (NaOH) is monoacidic.

Q: Conc. of NaOH: TRIAL 1 TRIAL 2 TRIAL 3 Mass of flask 81.061 g 69.692 g 96.039 g Mass of flask and…

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Q: What goal is accomplished by standardizing  solutions?

A: Standard solution is made from a solute of known amount to prepare a solution of known…

Q: C Complexometric Titration

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Q: Calculate the number of moles in each sample. 11.1g of nitrogen dioxide

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Q: Write Briefly about Methods of Expressing Concentration ?

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Q: T or F: The normality of the solution obtained by dissolving the acid sample be approximately the…

A: The normality of a solution is calculated by the ratio between the gram equivalent to the solution…

Q: [Review Topics] [References] Use the References to access important values if needed for this…

A: The relation between molality and mole is-  Molality= mole / kg of solvent

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.