Calculate the wavelength and energy of photons necessary to promote an electron from the n=3 state to the n=4,5,6, and 7 states in hydrogen. Label the region of the electromagnetic spectrum for each of the emission lines.

Q: 3. Why is it unwise to allow the solution of the Grignard reagent to remain exposed to air for an un...

A: The reactive nature of Grignard’s reagent does not allow the Grignard reagent to stay in nature and ...

Q: Gold is alloyed with other metals to increase its hardness in making jewelery. You have a piece of j...

A: Given:Density of pure gold = 19.3 g/cm3Density of pure silver = 10.5 g/cm3Volume of piece of jewelle...

Q: can you solve these 2 and just provide the answer I solved most of the work I just wanna make sure t...

A:

Q: A solution is created by dissolving 10.0 grams of ammonium chloride in enough water to make 355 mL o...

A: Given,Mass of ammonium chloride (NH4Cl) in the solution = 10.0 gThe moles of ammonium chloride prese...

Q: Use the data provided to calculate benzaldehyde’s heat of vaporization.  Vapor Pressure (torr) Te...

A: The heat of vaporization of benzaldehyde is calculated as,

Q: A 35.1 g sample of solid CO2 (dry ice) is added to a container at a temperature of 100 K with a volu...

A: Given,Mass = 35.1 gMolar mass of propane is = 44.01 g/molVolume = 4.0 LTemperature = 298 K

Q: Which factors affect the relative acidity of an oxyacid?

A: Oxoacids are composed of hydrogen, oxygen, and any other element. In oxoacids, at least one hydrogen...

Q: please help

A: The balanced equation and calculation of number of moles are given below:

Q: Why does polysubstitution frequently occur with friedel crafts alkylation but not with friedel craft...

A: Polysubstitution frequently occur with Friedel-Crafts alkylation but not with Friedel-Crafts acylati...

Q: What is the Brønsted–Lowry definition of an acid? Of a base?

A: A Bronsted –Lowry acid:A Bronsted –Lowry acid is a proton donor, it donates a hydrogen ion (H+)

Q: Rubidium has two naturally occurring isotopes, rubidium-85 (atomic mass = 84.9118 amu; abundance = 7...

A: Given information:Isotopes of rubidium are Rb-85 and Rb-87.Atomic mass of Rb-85 is 84.9118 amu and a...

Q: which react faster and slower than benzene; bromobenzene, benzonitrile, benzoic acid, nitrobenzene, ...

A: Monosubstituted benzenes can be nitrated using a mixture of Conc. HNO3 and H2SO4. Electron releasing...

Q: What kinds of cations act as weak acids? List some examples.

A: Cations act as weak acids:Some cations accept hydroxide ion from water to form weak conjugate bases....

Q: What is the pH and pOH of a: a) 0.20M NH4CI solution? b) 0.47M NaCN solution?

A:

Q: An aquarium measures 16 in. X 8 in. X 10 in. How many liters of water does it hold? How many gallons...

A: Calculate the amount of water (in liters) that can be hold by aquamarine:

Q: A glass container was initially charged with 1.70 moles of a gas sample at 3.75 atm and 21.7 °C. Som...

A: Calculate the volume occupied:Assuming the gas to be ideal gas, volume occupied by the gas can be de...

Q: What is the major product(s) of each reaction?

A: Hey, since there is multiple sub part questions posted, we will answer first three questions. If you...

Q: What are the main detrimental effects of acid rain? What is being done to address the problem of aci...

A: Generally, metal gets dissolved on reaction with acid by evolution of hydrogen gas and forms salt.

Q: The quotient of 12.987g divided by 20.0cm^3

A: Given,12.987 g divided by 20.0 cm3 

Q: assume a car gets 28.0 mi/gal using gasoline at $3.50/gal and 22.5 mi/gal using E58 at $2.85/gal. Ho...

A: Calculate the cost to drive 500 km using gasoline:28 miles per gallon of gasoline at $3.50.

Q: 2. Now write the condensed formulas for the following bond-line structures. la он Н HO.

A:

Q: The compound formula is Cu(NO,)2 15. Indicate the total number of all ions of the salt solution if 0...

A: 15. Copper nitrate, an ionic compound soluble in water.  

Q: Hi. So I got a test question wrong. The question was: A bottle of cola purchased in Europe gave the ...

A:

Q: A 0.867 g sample of an unknown acid requires 32.2 mL of a 0.182 M barium hydroxide solution for neut...

A: The reaction between diprotic acid and Ba(OH)2 is as follows,

Q: The NH4+ and NO3− ions of ammonium nitrate are held together by_____ bonds. To separate these two op...

A: Ionic bonds are formed by the complete transfer of one or more electrons to the other atom, thereby ...

Q: A common unit of pressure is the Pascal, Pa, which is equivalent to Newton per meter squared (N/m2)....

A: Given:0.224808943 pounds is identical to 1 Newton.

Q: How would I be able to look at the compound C2H6 and be able to determine what kind of bond there is...

A: Molecular geometry is the 3-D representation of the molecule in a space. In terms of electron densit...

Q: The Gateway Arch in St. Louis, MO is approximately 630 ft tall. How many U.S. half dollars would be ...

A: Since you have posted a question with multiple sub-parts, we will solve first three subparts for you...

Q: Please solve 2nd question which is related to hess law

A: In-order to find the enthalpy change of the desired reaction, the given reactions has to be written.

Q: What is the percent hydrolysis of a 0.26M KF solution?

A: The KF is hydrolysed completely which is shown as follows:

Q: How to prepare Saturated brine (NaCl) solution (50 mL)

A: A saturated solution of sodium chloride that means a quantity of sodium chloride solute to would be ...

Q: The radius of an atom of gold (Au) is about 1.35 Å. (a) Express this distance in nanometers (nm) and...

A: It is given that :Radius of gold atom = 1.35 Å

Q: can you solve these 2 and just provide the answer I solved most of the work I just wanna make sure t...

A: The balanced chemical equation for the reaction is,2I2O5 + 10NO → 5N2O4 + 2I2The number of molecules...

Q: Consider a cloudless day on which the sun shines down across the United States. If 2511 kJ of energy...

A: The entire area of the United States is,

Q: Calculate the enthalpy change (in kilojoules <kJ>, NOT Joules) associated with the conversion ...

A: Given,Mass of water = 18.6 grams.Temperature of water = -14.50C.Temperature of water vapor = 124.70C...

Q: If a temperature increase from 10.0 °C to 20.0 °C doubles the rate constant for a reaction, what is ...

A: Given information:Initial temperature (T1) = 10.0 °CFinal temperature (T2) = 20.0 °CRate constant k1...

Q: 5. Assign the appropriate formal charge to the indicated atoms. Here, lone pairs are shown for learn...

A: The formal charge can be calculated as follows:

Q: Write down the seculardeterminant for naphthalene within the Hückel molecular orbital approximation

A: Huckel molecular orbital is the simplified version of linear variational method which can be applied...

Q: 83 Which of the following electron configurations corre- sponds to the ground state and which to an ...

A: An atom is mainly composed of three sub-particles; electrons, protons and neutrons. These particles ...

Q: can you solve these 2 and just provide the answer I solved most of the work I just wanna make sure t...

A: Hey, since there are multiple questions posted, we will answer first question. If you want any speci...

Q: Cesium chloride has a body-centered cubic structure with unit cell 0.4123 nm. What is the potential ...

A: Potential energy can be calculated using the following formula.

Q: Acetylene (C,H,) gas is often used in welding torches because of the very high heat produced when it...

A: The balanced reaction for the reaction of acetylene with oxygen gas to produce carbon dioxide and wa...

Q: True or false? a. Green electromagnetic radiation with a wavelength of 500 nm has an energy that is ...

A: Hello. Since your question has multiple sub-parts, we will solve the first three sub-parts for you. ...

Q: can you solve these 2 and just provide the answer I solved most of the work I just wanna make sure t...

A: We’ll answer the first question since the exact one wasn’t specified. Please submit a new question s...

Q: Calculate the solubility of silver chloride in a solution that is 0.100 M in NH3.

A: Given information:Concentration of ammonia is 0.100 M.The value of Kf for Ag(NH3)2+ is 1.6×107.

Q: In the United States, barometric pressures are generally reported in inches of mercury (in. Hg). On ...

A: Conversion of in.Hg to torr.Given,30.45 in.Hg30.45 in.Hg pressure to torr.

Q: Explain the meaning of each term within the Arrhenius equation: activation energy, frequency factor,...

A: The Arrhenius equation can be written as follows,

Q: Describe the characteristic electron-domain geometry of each of the following numbers of electron do...

A: The characteristic electron-domain geometry of given following numbers of electron domains about a c...

Q: The black powder used to propel each firework into the sky made up of 75% by mass potassium nitrate,...

A: Given, 75% by mass potassium nitrate15% by mass charcoal10% by mass sulphur65.0 grams of charcoal

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.