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A weather balloon has a volume of 750 L when filled with helium at 8 degrees C at a pressure of 380 torr. What is the new volume of the balloon where the pressure is 0.20 atm nd the temperature is -45 degrees C?
A first order reaction has an activation energy of 65.7 kJ/mol and a frequency factor (Arrhenius constant) of 2.36 x 1013 sec -1. Calculate the rate constant at 18 oC
Dry ice, CO2 (s), has a melting temperature of -78o C and will not form a liquid unless atmospheric pressure exceeds 5.1 atm. The following reaction is conducted at -90o C and 101.325 kPa: CO2 (g) ? CO2 (s)
A molecule in which centers of positive and negative charge do not coincide must be.
What compounds react with the diazonium salt to give the phenolic product? Why should an excess of nitrogen be avoided in this reaction?
Sucrose, C12H22O11, is a nonelectrolyte; hypochlorous acid, HClO, is a weak electrolyte; and ammonium chloride, NH4Cl, is a strong electrolyte.
At a particular temp and pressure it takes 4.55 min for a 1.5 L sample of He to effuse through a porous membrane. how long would it take for 1.5 L of F2 to effuse under the same conditions
How many grams of F2 are needed to produce 120. g of PF3 if the reaction has a 78.1% yield?
What molecule does most probable speed of 393m/s at 25*C? Also calculate the mean speed
Does (CH3CH2)2C=CHCH2CH3 have any cis/trans isomers and if so what are they? Constitutional isomers? Can you sketch
What weight of malononitrile would be recovered by extraction with (a) three 100-mL portions of ether; (b) one 300-mL portion of ether.
A fluoridated water supply contains F- at a concentration of 8.9 ppm. What is the maximum concentration of Mg2+ that can exist in this water supply without causing precipitation.
Once 1-butyl-bisulfate is formed, the 1-butanol can act as a nucleophile to form dibutylether. Propose a mechanism for that reaction
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