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?
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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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