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Calculate the energies of the first four rotational levels of H^127 free to rotate in three dimensions, using for its moment of inertia I=uR^2, with u= mHmI/(mh+mI) and R= 160 pm.
For each species listed, indicate the hybrid orbital set (sp2, sp3d, etc) employed by the central atom
What is the molar mass of the unknown compound if the solution has a freezing point of -5 oC?
Liquid sodium is being considered as an engine coolant. How many grams of liquid sodim (minimum) are needed to absorb 4.70 MJ of energy (in the form of heat) if the temperature of the sodiumis not to increase by more than 10.0 C
what is the enthalpy of vaporization of acetone ch3coch3 at its normal boiling point of 56.2?c? the entropy of
When NH3 is prepared from 28 g N2 and excess H2 the theoretical yield of NH3 is 34 g. When this reaction is carried out in a given experiment, only 30. g is produced.
Suppose one wated to take another approach where C is heated until 5% of the atoms occupy the electronically excited state. Consedering only the lowest-energy ground state and the elctronically excited state
how many moles of solute are present in 700ml of 0.230M SrBr2
For the gas phase decomposition of C2H5Cl, a graph of ln t versus 1 / T produced a straight line with a slope of 2.98 × 104 K. What is the activation energy for this reaction
Gives what happens at neutral pH for aluminum hydroxide. A) Al dissolves B) Al(H2O)63+ dissolves C) Al(OH)3 precipitates D) Al(H2O)2(OH)4- dissolves
Calculate the work, heat, energy and enthalpy change upon: a) expansion by 3.3 L at p=const (isobaric). b) isothermal expansion by 3.3. L against a constant external pressure of 30.0 kPa c) reversible isothermal expansion by 3.3 L.
A semipermeable membrane is placed between the following solutions. Which solution will decrease in volume? Solution A: 1.31% (m/v) starch Solution B: 7.48% (m/v) starch
An experiment requires 43.0 of ethylene glycol, a liquid whose density is 1.114 . Rather than weigh the sample on a balance, a chemist chooses to dispense the liquid using a graduated cylinder. What volume of the liquid should he use?
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