Question

Would someone mind helping me with a half-life questions?

Answer 1

Time (seconds) Radioactive atoms remaining (not decayed) Atoms decayed
0 200 0
3 109 91
6 53 56
9 36 18
12 19 15
15 7 12
18 3 4
21 1 2
24 0 1
27 0 0
30

Answer 2

That's the graph where I'm supposed to figure it how from but I have clue.

Answer 3

what are you supposed to find?

Answer 4

if you want to find the half-life you can use the first-order integrated rate law:

\(ln[A]_t=-\dfrac{t*ln(2)}{\color{red}{t_{1/2}}}+ln[A]_{\circ}\rightarrow \color{red}{t_{1/2}}=-\dfrac{t*ln(2)}{ln[A]_t-ln[A]_{\circ}}\)

Answer 5

The question just says "Find the half-life of your substance". Don't understand how to fill
out your equation.

Answer 6

t=time
\(t_{1/2}\) = half-life
\([A]_{\circ}\)=original amount of substance
\([A]_t\)=amount of substance left after time, t.

Answer 7

pick any 2 points and plug them in.