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Given that incident radiation of 5000A is used on a photocell containing cesium and the threshold wavelength of the photoelectric effect is 660 nm.
Describe the enthalpy of reaction among sodium hydroxide (NaOH) and citric acid (H3Cit). Note that the neutralization reaction is:
Describe the radius in the Angstroms at which the electron is most likely to be found. Suppose the species has an atomic number of 2. Write down for yourself the expression for the radial distribut
Describe the concentration of h+ in solution of .001 M NAOH? What is the ph? Calculate the concentration of OH- in a solution with H+ concentration of 1.3 x 10^-5? What is the ph?
The temperature dependence of the vapor pressure of solid sulfur dioxide can be approximately represented by the relation log(p/Torr)=10.5916-1871.2(T/K) and that of liquid sulfur dioxide by log(p/
Calculate to what speed must an electron be accelerated for it to have a wavelength of 3.0 cm and the same for a proton? Professor did not give example problem to help in solving this.
The rate constant for the reaction is 2.48 × 10-4s-1. Determine the half-life? Discuss how long will it take for the initial pressure of C4H8 to drop to 90% of its initial value?
The following reaction is given: 2NiS2 +5O2 (arrow) 2NiO + 4SO2 When 11.2g of NiS2 react with the 5.43g of O2, 4.86g of NiO are obtained.
A mixture of o-nitrophenol and p-nitrophenol can be separated by the steam distillation. The o-nitrophenol is steam volatile, and the para isomer is not volatile. Explain.
Silver nitrate reacts with iron (III) chloride to give the silver chloride and iron (III) nitrate. A solution which is having 18.0 g ofAgNO3 was mixed with a solution which is having 32.4 g of FeCl3
Determine the value of E for a system that absorbs 213 J of heat and has 55 J of work performed on it. Demonstrate the formula, what each number represents, and how to solve?
Why the composition and proportion of the phases present when a solid of composition x=0.30 is heated to 2200 degrees Celsius.
Explain that why the spots should apply to the TLC plate be kept as small as possible? Suggest a good method to confirm that the two samples are the same or not the same.
Suggest a reason that TLC plates that are stored in a highly humid room result in different Rf value s than plates that are stored in a dehumidified environment.
Discuss why must the injection port and the detector always be heated to higher temperatures than the column in a gas chromatograph?
Discuss how some solid samples (compounds that are solid at room temperature) can be analyzed by gas chromatography and explain how they would be introduced into the injector port and col
Determine the numbers of phosphorous atoms are in the sample? Suppose a device is using a 15.0-mg sample of silicon that is doped with 1x10-5% (by mass) phosphorous.
The Space Shuttle uses aluminum per chlorate and aluminum metal in its reusable booster rockets. The Products of the reaction are aluminum chloride, aluminum oxide, nitrogen oxide gas and the steam:
Suppose you have been recently hired by a major pharmaceutical company. Soon after been hired the FDA passed a new rule that requires all drug makers to identify any chiral molecules that they
Determine the approximate boiling point of a mixture of bromobenzene and water at the atmospheric pressure. Explain in detail.
Compute a particle of mass m confined in an infinite one-dimensional potential well of length a. suppose the system is in quantum state n.
Assuming no loss of water and the heat capacity for the vessel of 10.0 J/K, determine the final temperature of the system where c of copper = 0.387J/g·K?
What type of hydrocarbon is it? An unknown hydrocarbon burns with a clean blue flame. It is insoluble in water, and does not decolorize either 2% bromine in dichloromethane or 1% KMnO4.
Determine the structures of compounds O, P, and R? Compound O, a hydrocarbon, was chlorinated at 300 C to yield two isomeric monochlorinated compounds, P and R.
Calculate the normalized super position wave function |ψ>. A particle is twice as likely to be found in the ground state as the first excited state. Calculate the expectation value of the en