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If the average Bohr radius in the n=1 orbit 3.25x10^-8m, what is the wavelength of the standing electron wave?
102nm32.5nm204nm408nm325nm
Calculate the internal energy and enthalpy of 1 kg of air occupying 0.05 m3 at 20 bar. If the internal energy is increased by 120 kJ as the air is compressed to 50 bar, calculate the new volume occupied by 1 kg of the air.
what is the percent yield of a reaction in which 212 g phosphorus trichloride reacts with excess water to form 137 g
What mass of NaCl must be dissolved in 65.0 grams of water to lower the freezing point by 7.50 °C? The freezing point depression constant, Kfp, for water is -1.86 °C/m.
What is the maximum body accumulation of methylmercury at a constant ingestion rate of 4 mg of mercury per day?
how would you make 100ml of a buffer with a pH =4.25, starting with 0.25 M acetic acid and 0.25M sodium acetate
Predict the freezing point of a solution prepared by dissolving 8.9 g MgCl2 in 98 g H2O. Kf for water is 1.86 °C m-1. A) 3.5 °C B) -3.5 °C C) 5.3 °C D) -5.3 °C E) -0.51 °C
Acid strength decreases in the series HI > HSO4- > HF > HCN. Which of these anions is the weakest base
25 mL of 0.100 M AgNO3 are mixed with 35 mL of 0.0500 M K2CrO4. (a) Calculate the concentrations of each species at equilibrium.
derive the irreducible representations for the normal vibrations of XeF4 and determine which are IR active, which are Raman active
if a reation vessel contains .25 mol KO2 AND .15 mol H2O, what is the limiting reactant ? How many moles of oxygen can be formed ?
How many grams of solid barium sulfate form when 25.5 mL of 0.160 M barium chloride reacts with 69.3 mL of 0.055 M sodium sulfate? Aqueous sodium chloride is the other product.
What is the molality of ethanol in a solution prepared by dissolving 5.00 mL of ethanol (C2H5OH, of density 0.800 grams/mL) in 25.0 mL of water (H2O, of density 1.000 grams/mL)?
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