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The molar mass of a volatile substance was determined by the Dumas-bulb method. The unknown vapor had a mass oThe molar mass of a volatile substance was determined by the Dumas-bulb method. The unknown vapor had a mass of 0.852 g, the volume of the bulb was 356 cm3, pressure 755 torr, and the temperature 88°C. Calculate the molar mass of the unknown vapor.
A radiometric dating technique uses the decay of U-238 to Pb-206 (the half-life for this process is 4.5 billion years) to determine the age of the oldest rocks on Earth and by implication the age of Earth itself The oldest uranium-containing rocks..
calculate the molality m of a 7.25 kg sample of a solution of the solute ethanol dissolved in the solvent water if the
A noble gas with a mass of 13.1 g occupies a 2.5 L container at a pressure of 3.2 atm at 298 K. What is the identity of the noble gas
In a half-life decay process, start with 4.00 mCi of material having a half life of 25 mins. Without any detailed calculations, approximately how many mCi of this isotope would be remaining after 2 hours and 10 mins
A certain automobile of mass 1920 kg travels on a German autobahn at 120 km/h. What is the wavelength of the automobile?
Calculate the potential that would be measured if the solution pH were 9.70, assuming the selectivity coefficient (Ks) for OH- is 0.1 and that ß is 1.00.
if 3.93 g of sodium borohydride contains 2.5times 1023 h atoms how many moles of h are present in 37 cm3 of sodium
The vapor pressure of br2(l) at 25C is 228 mm hg. if 2.00g of br2 is usedm what is the final pressure in the flask? will there be liquid in the flask.
Conclude the range of pressures that this system can exists as 2 phases By imagine Raoult's law is applied to the system
What is the formula of the missing product?
Determine the binding energy of F-19 nucleus. The F-19 nucleus has a mass of 18.99840325 amu. A proton has a mass of 1.00728 amu, a neutron has a mass of 1.008665 amu.
Potassium hydrohen phthalate, KHC8H4O4, functions as monoprotic acid. If a 1.46 g sample of impure KHC8H4O4 requires 34.3 ml of 0.145 M NaOH
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