Chemistry Mole Concept Solution: How many moles are in 25 mg of O 2? (Atomic mass o...

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Solution: How many moles are in 25 mg of O 2? (Atomic mass of O = 16.00 g/mol) A) 7.8 ×10−4 B) 1.6 ×10−3 C) 0.40 D) 0.80 E) 800