Question

Element X has a half life of 32 mins, 16 g of element X is decayed in 10 half lives, how much sample was initially available?

Answer 1

`a_0=16.02 g`

Explanation:

Here's a question I made myself and would like to answer:

The time of the half-life of X in the problem is an irrelevant piece of information
To Set up an equation, set the 16g equal to the amount decayed over 10 half lives
`(1/2+1/4+1/8+1/16+1/32+1/64+1/128+1/256+1/512+1/1024) a_0=16 g`

`a_0=16.02 g`