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estimate the linear velocity of an electron in a 2p state of a hydrogen atom. state any assumption and show your work. simplify any numerical expression to the best of your ability without a calculator. (hint: first compute the quantum mechanical angular momentum of electron)
If the pH of a bicarbonate-carbonic acid buffer is 7.90. Compute the ratio of the concentration of carbonic acid (H2CO3) to that of the bicarbonate ion (HCO3-).
At what point is the temperature in degrees farenheit exactly twice in degrees celsius
The probe indicates a stagnation pressure of 52 ×103 P a. If the stagnation temperature is 270°K, find the pressure, density, stagnation pressure and velocity of the flow upstream of the shock.
a sample containing 0.175 g of cl- is dissolved in 50 ml of deionized h2o. the solution is titrated to the equivalence
How would the Rf values change if you used pure dichloromethane ( no methanol ) as the mobile phase for the TLC separation of curcumin
Stricly speaking why is it incorrect to speak of a melting point. What effect would incomplete drying of a sample have on a melting point
Place the following complex numbers in a two-dimensional complex plane and find their absolute value lzl and phase angle arg
Determine how long will it take for the concentration to decrease to 0.13 mol/L express your answer in seconds.
If it is unnecessary to add an indicator to KMnO4 titration because of its intense deep purple color. will the end point of the titration coincide with the stoichiometric point. explain
Compute the initial pressure of the gas in the cylinder. b. Compute how much heat must be added to the gas in the cylinder for the spring to compress by 2cm
When 3.761 g of a hydrate of strontium chloride is heated to 60 degree celsius it forms strontium chloride dihydrate of mass 2.746 g. What is the formula of the original sample
A reaction has a standard free-energy change of -12.30 kJ mol-1 (-2.940 kcal mol-1). Calculate the equilibrium constant for the reaction at 25 °C.
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