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An electron in a hydrogen atom has undergone a transition from N = 4 to N = 3 energy levels. Find out the energy of the photon that is emitted in electron volts.
1. 0.66 eV
2. 0.83 eV
3. 0.91 eV
4. 1.04 eV
5. 1.33 eV
A sample of 1.00 mol of perfect gas molecules, originally at 1.00 atm, with a molar heat capacity at constant pressure of 7/2 R is put through the following cycle:
What will be the temperature difference needed in a hot-air balloon to lift 1.00 kg of mass. Assume that the volume of the balloon is 100 m3, the temperature of the ambient air is 25 oC, the pressure is 1.00 bar, and air is an ideal gas with an av..
how much isopropanol and how much water will you use to make 20 ml of a 40 isopropanol water solution? how much
The pKa's of benzoic acid and 4-nitroanilinium hydrochloride are 4.2 and 1.0, respectively.
Calculate the length in km of a row containing 1 mole of hydrogen atoms laid side to side if diameter of a hydrogen atom =.212 nm?
A reaction mixture at 175 initially contains 522 torr of NO and 421 torr of O2. At equilibrium, the total pressure in the reaction mixture is 748 torr. Calculate Kp at this temperature.
1. why does phenacetin or acetanilide not dissolve in dilutehcl?2. explain clearly why the solution of phenetidine or
for the decomposition of an antibiotic in aperson with a normal temperature of 98.6 f k0.0000250 s-1. for a person with
Write the condensed electron configurations for the Pt atom. Express your answer in condensed form in order of increasing orbital energy as a string without blank space between orbitals. For example, should be entered as [He]2s^22p^2.
If the pH of a solution is more than the pKa of an acid dissolved in it, is more of the acid in the protonated form or deprotonaqted form
A solution is composed of ethanol and water. The solution density is 0.964g/mL. The partial molar volume of ethanol at this concentration is 52.0 mL/mol and water is 17.0 mL/mol. What is composition of liquid by mass
A reaction has a rate constant of 0.00117 s^-1 at 400 k and 0.689s^-1 at 450 k.1- Calculate the activation energy (Ea) and the pre- exponential factor (A) for this reaction. 2- what is the value of the rate constant at 425k
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