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If Peter carries a 20 kg weight up a flight of stairs in 20 seconds and Mary carries the same 20kg weight up a flight of stairs in 30 seconds, who does the most work?
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The molar mass of iron(fe) is 55.8 g/mol. what is the mass in grams of 2.25 moles of iron?
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If Peter carries a 20 kg weight up a flight of stairs in 20 seconds and Mary carries the same 20kg w...
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