A 300-G Sample of ²¹⁸Po Undergoes $\alpha$ Decay with a Half-Life of 3

Multiple Choice

A 300-g sample of ²¹⁸Po undergoes $\alpha$ decay with a half-life of 3.1 minutes. After 15.5 minutes,

A) 9.38 g of ²¹⁴Pb would be formed.
B) 18.8 g of ²¹⁴Pb would be formed.
C) 120 g of ²¹⁴Pb would be formed.
D) 281 g of ²¹⁴Pb would be formed.
E) 291 g of ²¹⁴Pb would be formed.