Answer:
98.1
Step-by-step explanation:
Given: mass= 970 gm
Time = 14 min
rate of decay= 15.1% per minute.
Now, computing to get amount of element remaining after 14 minutes.
Formula; Element remaining= [tex]mass\times (1-r\%)^{t}[/tex]
Element remaining= [tex]970\times (1-15.1\%)^{14}[/tex]
⇒ Element remaining= [tex]970\times (1-0.151)^{14} = 970\times (.849)^{14}[/tex]
⇒ Element remaining= [tex]970\times 0.101= 98.057[/tex]≅ 98.1 (nearest 10th of a gram)
∴ 98.1 element is still remaining after 14 minutes.
