how do i tell what order this is in order to apply the corre

how do i tell what order this is in order to apply the correct half life equation?

QUESTION 10 5.50000 points Save Answer Tritium (hydrogen-3) has a half life of 12.32 years. How many years will it take for 5.57 g to undergo nuclear decay leaving 1.14 g of tritium? Give your answer with at least one decimal place! QUESTION 11

Solution

This is a radioactive decay. Radioactive decay processes are always first order processes and hence you use the first order rate equation