Question

If sodium 24 has a half life of 15 hours if there are 800g of na-24 initially how long will it take for 750g of na-25 to decay so that only 50g remains

Answer 1

It would take about 60 hours to decay so that only 50g of the sodium remains

How to calculate half life?

The half life is 15 hours and there are 800 g initially. Let N(t) represent the amount of sodium after t hours. Hence:

$N(t)=800(\frac{1}{2} )^\frac{t}{15} \\\\For\ 50g\ to \ remain:\\\\50 = 800(\frac{1}{2} )^\frac{t}{15}\\\\t=60\ hours$

It would take about 60 hours to decay so that only 50g of the sodium remains

Find out more on half life at: https://brainly.com/question/2320811