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How do the energy differences between the higher energy levels of an atom compare with the energy difference between the lower energy level of the atom
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11. phosphorus-32 is radioactive and has a half life of 14 days. how much of a 124 mg sample of phosphorus-32 is present after 56 days? a) 7.75 mg b) 15.5 mg c) 31.0 mg d) 62.0 mg
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How many grams of Kr are in a 9.59 L cylinder at 46.0 'C and 4.62 atm?
mass:...
mass:...
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