What mass (in g) does 3.99 moles of kr have?

exactly how may be the response A? How is the answer A?
What mass (in g) does 3.99 moles of Kr have? A) 334 g B) 476 g C) 211 g D) 240 g E) 144 g exactly what mass (in g) does 3.99 moles of Kr have actually? A) 334 g B) 476 g C) 211 g D) 240 g E) 144 g

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