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A local AM radio station broadcasts at an energy of 4.04×10-31 kJ/photon.
Calculate the frequency at which it is broadcasting.
Frequency = KHz
(1 KHz = 103 sec -1)
Problem- What is the total number of moles (n) of electrons exchanged between the oxidizing agent and the reducing agent in the overall redox equation: Cr2O72-(aq) + 6Fe2+(aq) + 14H+(aq) ? 2Cr3+(aq) + 6Fe3+(aq) + 7H2O(l)
A 30.0 mL sample of a diprotic acid is titrated with 0.255 M KOH. If 59.5 mL of base is required to reach the second equivalence point
Naming compounds containing double as well as triple bonds, Alkenes contain double bonds while alkynes contain triple bonds. How do you name a compound that has both a double and a triple bond
Define why it is good technique to slow the addition of NaOH titrant beyond the stoichiometric point
Consider a situation in which 211g of P4 are exposed to 240g of O2. What is the maximum amount of P2O5 that can theoretically be made from 211g of P4 and excess oxygen?
Assume that you dissolve 10.7g of a mixture of NaOH and Ba(OH)2 in 229.5 mL of water and titrate with 1.49M hydrochloric acid. The titration is complete after 108.7 mL of the acid has been added.
Calculate the percent by mass of the solute in each of the following aqueous solutions. (a) 3.57 g of NaBr in 78.2 g of solution % (b) 31.0 g of KCl in 144 g of water % (c) 2.8 g of toluene in 29 g of benzene %
Determine the volume of .450M NaPO4 is needed to precipitate all the lead(II) ions from 190.0mL of .550M Lead(II) nitrate?
Calculate the expansion work done against a constant external pressure of 0.995 atm and at a constant temperature of 22 degrees C. Assume that the initial volume of dry ice is negligible and that CO2 behaves like an ideal gas.
Air is flowing down a duct at a velocity of 200 m/s. The pressure and the temperature in the flow are 85 kPa and 10°C, respectively.
How many stereoisomers of 3,4-dichlorohexane exist? and what are they? .... what is the formula?
Initially the stopcocks are closed. One of the flasks contains 2.0 of , the second 3.7 of , and the third, 0.10 of ethanol. The vapor pressure of at 308 is 42 and that of ethanol is 102 . The stopcocks are then opened and the contents mix freely.
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