# Problem: 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

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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

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