Chemistry Mole Concept Solution: How many moles of Kr are contained in 398 mg of Kr...

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Solution: How many moles of Kr are contained in 398 mg of Kr?     A) 4.75 × 10 -3 moles KrB) 1.19 × 10 -4 moles KrC) 2.99 × 10 -3 moles KrD) 33.4 moles KrE) 2.11 × 10 -4 moles Kr