Lead-194 has a half-life of 11 minutes. A sample of lead-194 with a mass of 0.149g is allowed to decay for 66 minutes. What mass of lead-194 in grams remains in the sample after 66 minutes? a. 2.33 x 10 -3 b. 2.48 x 10 -4 c. 2.25 x 10 -4 d. 1.35 x 10 -2 e. no correct response

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