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Use planck's equation to determine the energy, in J/photon, of radiation of frequency 5.8*10^15 s^-1
A. 1.7*10^24JB. 5.2*10^-8JC. 1.7*10^-16JD. 5.8*10^-25JE. 3.8*10^-18J
Since the freezing point of a solution depends on the number of particles, what would you expect the freezing point of 0.1 m solutions of aqueous NaCL and BaCl2?
A sample of cerium-141 for a diagnostic test was dissolved in saline solution to an activity of 4.5 millicuries/mL. If the patient undergoing the test needs a dose of 10 millicuries
A portable CD player that draws 175 milliamperes of current is powered by Ni-Cd rechargable batteries. Compute the mass of NiO2 consumed when a disk is played for 115 minutes.
What is the expected boiling point of a solution prepared by dissolving 5.83 g of sodium iodide (NaI) and 59.2 g of water (H2O)? For water, Tb=100.00C and Kb=0.512C*m^-1.
a zero-order reaction has a constant rate of 3.00times10-4ms . if after 65.0 seconds the concentration has dropped to
Use the bond dissociation energies in Table 7.1 on page 219 (of your text) to calculate an approximate ?H° in kilojoules for the reaction of ethylene
methanol, CH3OH can be produced through the reaction of CO and H2. if 75.o grams of CO is used and the typical yield is 79.8%, what mass of methanol is likely to be produced.
The reaction 2A ---> B + C has a Kc of 0.2. The reaction is commenced with initial concentrations [A] = 0.2 M, [B] = 0.2 M and [C] = 0.2 M. In what direction does the reaction occur?
A sample of CH4 gas is observed to effuse through a pourous barrier in 5.08 minutes. Under the same conditions, the same number of moles of an unknown gas requires 8.63 minutes to effuse through the same barrier.
An insecticide has the following composition: 47.5% C, 2.54% H, and 50.0% Cl. Determine the empirical formula.
Calculate the value of the solubility product constant for PbSO4 from the half-cell potentials. PbSO4(s) + 2e- ? Pb(s) + SO42-(aq) Eº = (-0.383) V Pb2+ + 2e- ? Pb(s) Eº = (-0.127) V These half-cell potentials are not accurate.
Calculate the average absorbance and use this value for an absorbance point on your graph. Use the printed graph from above, find the average Absorbance of the unknown on the y-axis
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