What is the observed atomic weight of lithium
Natural lithium is 92.58% lithium-7, with atomic weight 7.016, and 7.42% lithium-6, with atomic weight 6.015. What is the observed atomic weight of lithium as it occurs in nature?
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How many liters of oxygen collected over H2O and measured at 27 degrees Celsius and 745.0 mm Hg can be prepared by decomposing 4.421 grams of gold (III) oxide?
Calculate the concentration of a solution composed of 13.1 g od Ba(NO3)2 dissolved in 750 g of water.
A half-cell, made by dipping a silver wire into 0.05 M aqueous AgNO, at 298 OK, develops a half-cell potential of +0.740 volts. What is the standard half-cell (Eo) for silver?
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An alpha particle with kinetic energy 15.0MeV makes a collision with lead nucleus, but it is not "aimed" at the center of the lead nucleus, and has an initial nonzero angular momentum (with respect to the stationary lead nucleus) of magnitude
The heat of vaporization of CCl2F2 is 289 J/g. What mass of this substance must evaporate in order to freeze 165 g of water initially at 23°C? (The heat of fusion of water is 334 J/g; the specific heat of water is 4.18 J/g·K.
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A 0.6407 g sample containing chloride and iodine ions gave a silver halide precipitate weighing 0.4430g. this precipitate was then strongly heated in a steam of Cl2 gas to convert the AgI to AgCl. the precipitate weighed 0.3181g. calculate % of ch
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