how much of a radioactive kind of nitrogen will be left after 30 minutes if you start with 1,920 grams and…
how much of a radioactive kind of nitrogen will be left after 30 minutes if you start with 1,920 grams and the half - life is 10 minutes? grams
Answer
Answer:
240
Explanation:
Step1: Calculate number of half - lives
$n=\frac{30}{10}=3$
Step2: Use half - life formula
$A = A_0\times(\frac{1}{2})^n$, where $A_0 = 1920$ and $n = 3$. So $A=1920\times(\frac{1}{2})^3$.
Step3: Calculate the result
$A = 1920\times\frac{1}{8}=240$