4
QuizMultiple Choice
Unit Test
Question 4 of 15 • *25-26 KCS18 Chemistry IC
Potassium-40 has a half-life of 1.277 109 years. After 1.022 1010 years, how much potassium-40 will remain from a 500.3-g sample?
Answer
A
approximately 1.95 gB
approximately 3.91 gC
approximately 62.54 gD
approximately 71.47 g