The half life of protactinium 234 in its ground state is 6.69 h. What fraction of a given amount remains after 26.76 h
Chemistry
kitkatmonkey78
Question
The half life of protactinium 234 in its ground state is 6.69 h. What fraction of a given amount remains after 26.76 h
2 Answer

1. User Answers znk
Answer:
¹/₁₆
Stepbystep explanation:
The halflife of Pa234 (6.69 h) is the time it takes for half the Pa to decay.
After one halflife, half (50 %) of the original amount will remain.
After a second halflife, half of that amount (25 %) will remain, and so on.
We can construct a table as follows:
No. of Fraction
halflives t/(h) remaining
2 13.38 ¼
3 20.07 ⅛
4 26.76 ¹/₁₆
5 33.45 ¹/₃₂
We see that 26.76 h is four halflives, and the fraction of Pa234 remaining
is ¹/₁₆.

2. User Answers lonagirlhayeshome3jm
your answer is 1/16
because once you multiply the first two stated numbers you divide it by the last to get your answer