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Chemistry, 22.06.2019 07:30
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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What produces wave a)sound b) heats c)transfer of energy d)vibrations
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What element has similar physical and chemical properties as boron.
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A0.100-kilogram apple hangs in a tree 1.50 meter above the ground. ignore frictional effects, the total mechanical energy of the apples is
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Caustic soda is 19.1 m naoh and is diluted for household use. what is the household concentration if...
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